The use of barite grinding mill processing flow as follows: the raw barite calcined by calcination equipment such as rotary kiln, the processed lime change into calcium oxide. Then the calcium into the mill’s host through the screw conveyor, under the joint action of the multilayer grinding rings and multiple rollers,it become fine barite powder. Barite powder are transported to storage silos under the action of wind, after removal equipment processing collected, lime will finish processing.

 

The fineness of barite is relatively high when using ultrafine mill, generally the fineness is 300-3250 mesh. The fineness of the mineral powder has a very high activity and significantly expanded range of applications.So it is not only used in the construction industry, but also used in the paint, plastics and rubber industries.

 

The main component of calcium carbonate’s natural rock calcined at a suitable temperature, after eliminate the decomposition of carbon dioxide, the resulting calcium oxide (CaO) as the main ingredients is lime, also known as barite.

 

Calcination of calcium carbonate to produce barite is the traditional production process, with the development of science, the production of barite used mechanized, semi-mechanized shaft kiln and rotary kiln, fluidized bed furnace and other equipment.

Mica is the major solid waste of coal-fired power plants. Every year, the large sum or mica may cause environment pollution and resource waste.

However, mica can be applied as the mixed material of mica powder processing. The functions are improving capacity, energy saving, cost reducing, and can improve product performance.

The capacity of cement will rise for 10-15% if added with mica, and will rise for 20-30% if added mica and slag. It will also increase corrosion stability.

When producing mica powder, it can take the method of jointly grinding or separately grinding. The feeding mica fineness should be around 0.08mm (200 mesh), much smaller than other material.

Jointly grinding is to send the raw material, gypsum and mica into the mill to be ground together. The technology is simple and easy to operate. The mica will not only assist the grinding, but also help to clean the powder on the wall, which will increase capacity.

Mica materials are generally natural rocks as the main component such as chalk, dolomitic mica all can be used to produce lime.

The main component of mica’s natural rock calcined at a suitable temperature, after eliminate the decomposition of carbon dioxide, the resulting calcium oxide (CaO) as the main ingredients is lime, also known as mica.

Calcination of mica to produce mica is the traditional production process, with the development of science, the production of mica used mechanized, semi-mechanized shaft kiln and rotary kiln, fluidized bed furnace and other equipment. Calcination time is correspondingly reduced, lime rotary kiln production only need 2 to 4 hours. Compared with kiln production,it can improve production efficiency more than 5 times. In recent years, the use of ultrafine mill for processing mica improve the utilization value and scope of mica.

Ways and methods of gypsum recycling are: the produce of construction gypsum powder, gypsum board and gypsum block; as cement retarder, production of cement and sulfuric acid and ammonium sulfate; can be made into paper filler; can be used as soil conditioner in agriculture field. Recently, an innovative of new technology is to extract rare earth elements from gypsum.

Poland had reported this technology as early as in the 1990s about extracting rare earths from apatite; and our country carried out a experimental study of launched comprehensive utilization of gypsum and extraction of rare earths, it is learned that this innovative technology can solve three problems once: extracting important rare earth metals from industrial waste, gypsum building materials, and waste recycling.

In phosphoric acid production process, part of the phosphate rock is not decomposed, gypsum washing the filtration process is not completely and the addition of additive are all reasons of gypsum containing phosphorus, fluorine and other impurities. gypsum can be used in pharmacy industry.

Kaolin is a kind of clay and clay rock mainly composed of kaolinite group clay minerals. Kaolin is white, fine and soft, with good plasticity, fire resistance and other physical and chemical properties. It is also an important non-metallic mineral, which is called the four major non-metallic minerals together with mica, quartz and calcium carbonate, and is widely used.

Kaolin is mainly used in paper making, ceramics and refractory materials, followed by coating, rubber filler, enamel glaze and white cement raw materials, and a small amount is used in plastics, grinding wheels, daily cosmetics, medicine, textiles, petroleum, chemical industry, building materials, national defense and other industrial sectors. With the rapid development of modern science and technology, some high-tech fields began to use a large amount of kaolin as a new material, as well as high temperature resistant porcelain parts of atomic reactors, space shuttles and spaceships, also made of kaolin.

The continued popularity of the kaolin sales market has led many regions with high-quality kaolin resources to encourage local enterprises to invest in the kaolin mining and processing industry. At present, all applications of kaolin must be grinded into fine powder before it can be added to other materials for complete fusion. At present, the equipment for processing the fine kaolin powder below 400 meshes are R Raymond mill, high pressure medium speed mill, overpressure V mill, etc., which can process the raw kaolin ore into 80-400 meshes of different specifications.

The complete configuration of the kaolin mill includes jaw crusher, bucket elevator, vibrating feeder, main machine of the mill, classifier, powder collector, pulse dedusting system, air compressor, electrical control system and the corresponding supporting grinding equipment of the mill. Collirick kaolin mill has a unique crushing chamber structure and advanced grading device to ensure that the equipment can achieve ultra-fine powder processing. Especially, it is suitable for processing products with high whiteness requirements, such as kaolin, calcite, calcium lime powder, etc., which are characterized by high whiteness, fine particle size, and no black slag.
Kaolin Processing Equipment

Due to the high industrial value of kaolin and the increasing demand for mining, Shanghai Collirick Machine has launched a full set of kaolin processing equipment, which is mainly composed of hammer crusher, bucket elevator, storage bin, vibrating feeder, Raymond mill, grader, magnetic separator, compressor, electric control system and some conveying equipment; It is applicable to the processing of superfine powder with materials ranging from 3.25 meshes to 3000 meshes.

If a soft material is added between the cover plate and the main body, under the action of the pressing force, the sealing material will be deformed, filling the wet groove, reducing the air leakage gap, and then playing a sealing role. in addition to the mechanical pressing force, the force generated by the static pressure difference acting on the cover plate uniformly acts on the cover plate.

when the direction of the force is the same as the pressing direction, it becomes the pressing force, and when it is opposite, it becomes the loosening force. the cover air tightness effect plays the opposite role. therefore, setting the closing direction of the cover plate correctly and making full use of the pressure difference existing in the system to positively press the cover plate can achieve a good leakage prevention effect.

The selection of dust removal bag is very important, it directly affects the dust removal effect of ultrafine vertical mill. the selection of dust removal bag is selected from the following aspects: gas temperature, humidity and chemical properties, particle size, dust concentration, filtering wind speed, dust removal method and other factors. in pulsed and airbox pulsed ultrafine vertical mills, dust is attached to the outer surface of the bag.

For the back-flushing bag-type ultrafine vertical mill, after the bag room is cleaned, the pressure loss can only be reduced to 20-80% of that before cleaning because there is still a layer of adhering dust. when the cleaning is not complete, the adhesion layer is speckled. if the work is continued, the pressure loss will rise sharply. this shows that the pressure loss of the filter bag has decreased, which does not mean that the dust is completely cleaned.

For multi-chamber bag-type ultrafine vertical mills, the method of off-line cleaning by separate chambers is often used. at this time, although the actual total filtration area of ​​the ultrafine vertical mill is reduced, the pressure loss will increase slightly. when the cleaning is finished and the work is resumed, because the impedance of the bag chamber for cleaning has dropped and the air volume passing through it has increased, the total air volume of the reverse-blow bag ultrafine vertical mill will increase after cleaning, compared with before cleaning, and the pressure loss will increase. will drop.

The dust-removing effect of the back-flushing bag-type ultrafine vertical mill is relatively weak, so the filter cloth is generally recommended to use a lighter woven cloth [300-450g/㎡], which is rich in softness and has a small size change.

1. The grinding efficiency is high. The vertical roller mill of the SBM vertical roller mill adopts large-diameter double-row spherical roller bearings, which makes the equipment run faster, reduces the power consumption of startup, and the rotating device is also simplified. Delicate and able to meet customer needs.
2. The output can reach 615 tons per hour, and the phenomenon of calcium stone blocking the feeding port will not occur during the grinding process, which improves the grinding capacity and output of the equipment.

3. The output range of vertical roller mill is still very large, the output of small equipment is 0.65 tons per hour, and the output of large equipment is 615 tons. Equipment with different output not only differs in the amount of raw materials used, but also the structure design of large equipment is more complicated, so their prices There is definitely a big difference, and different manufacturers have different cost inputs and different pricing. We need to compare and choose equipment with high cost performance when purchasing.

Too much or too little bearing oil, oil pollution or oil quality is not in line with the lubricating system can ensure the normal operation of the ultrafine mill bearing, prevent foreign matter intrusion and sealing effect, but also eliminate friction heat, reduce friction and wear, and prevent the bearing from overheating Therefore, during production, be sure to ensure the amount and quality of ultrafine mill bearing grease.

Solution: It is necessary to regularly add oil to the bearing box according to the requirements of equipment use to avoid too much or too little oil. If there is a problem with the oil quality, it is necessary to clean, replace the oil and seal in time.

After long-term operation, some parts of the ultrafine mill may be severely worn or even broken. Common wear and tear parts include spring springs, bearings, pipe beams, beams and screen frames. The spring should be an important part of the ultrafine mill for shock absorption and noise reduction.

If the spring is worn or broken, it will not only produce a large noise, but also cause disorder on the screen. Solution: The spring should be replaced in time to prevent production accidents.

First, pay attention to the pre-tightening degree of special screws under the condition that the screw is well lubricated and has no rubber damage.

The rubber is glued to the back of the gate. It is necessary to ensure that the rubber is firmly bonded and the surface is flat. Install the gate when it is fully dry. The special screws are designed according to the selection and structural dimensions.

After pre-tightening, the natural pre-tightening force between the gate and the U-shaped plate of the tank body should meet the design requirements, and no adjustment should be made unless there are special circumstances, otherwise the pre-tightening is too loose or excessive.

Tightening may lead to running water, and the lifting is not smooth. The above are the common mechanical failures of mechanical kaolin milling equipments. In actual production, attention should be paid to the maintenance and maintenance awareness of the kaolin milling equipment.

The kaolin milling equipment tank failure is mainly due to air leakage, which generally occurs in the equipment installation stage. Different degrees of water seepage and leakage may occur at the anchor position, and some may appear at the individual welds of the channel bottom channel.

Water seepage and leakage have no effect on the use of the equipment, but have a greater impact on the environment. Troubleshooting and troubleshooting: The surface connection of the tank body must ensure that the rubber is complete and free of deformation.

Fill the flange surface with sealant to seal, strengthen the seal, and pre-tighten the bolts after the joint surface is well connected. If it is found that the gap of the connected tank body leaks, first check whether the bolts are loose and whether the rubber is damaged. Try loosening the preload bolts, refill the sealant if the bolts and rubber or maintenance interval, and then preload the bolts.

Troubleshooting and troubleshooting: First of all, when the grinding mill is installed for the first time, the foreign objects in the tank should be removed first, and the large pulley should be turned to confirm whether it rotates flexibly and whether the belt is properly tight. 

Start the inspection to confirm that the belt is running in the correct direction (the correct direction is clockwise when looking down). Make sure that the belt is free of scratches, and then officially start. If the above problems occur during the operation of the grinding mill, the belt should be removed, and the stirring parts should be disconnected for separate investigation. 

The routine inspection part is the motor, the verticality of the motor shaft should be checked, the structure between the motor and the plate, the plate and the bracket is in good condition, the motor can be tested separately for wiring, and the small pulley can be visually checked to see if the operation is stable. 

Influenced by factors such as lubrication, if necessary, please ask professional motor maintenance personnel to carry out maintenance. 

When the feeding is stopped, grinding aids (such as dry coal and quicklime) can be added to the cylinder. After the grinding sound of the ultrafine vertical mill returns to normal, first feed a small amount of material, and then gradually increase the feeding amount until it is normal. 

Always observe whether the current of the main motor of the ultrafine vertical mill increases. If the current increases, it means that the "full grinding" phenomenon of the ultrafine vertical mill has been eliminated, and the feeding amount can be gradually increased. 

Stop the machine to check the compartment board and grate board. If the above methods do not work, the method of stopping and grinding can be adopted. Empty all the steel balls and materials in the barrel of the ultrafine vertical mill, and at the same time clean the attached materials on the liner and steel balls, then reload the balls and start the operation.

When there is a slight "full grinding" phenomenon, the grinding sound of the vertical roller mill changes from clear to low, the discharge volume at the end of the vertical roller mill decreases, and the air pressure at the inlet and outlet of the middle unloading drying mill increases; when the "full grinding" phenomenon is aggravated When the grinding sound of the vertical roller mill disappears completely, the current of the main motor is only about 70% of the normal value, and the discharge volume at the tail end of the vertical roller mill is greatly reduced; and when the phenomenon of "full grinding" is extremely heavy, the head end of the vertical roller mill returns material, and the tail end of the vertical roller mill returns.

Unexpectedly, there is no air at the outlet of the air extractor.What causes the "full grinding" of the vertical roller mill? Sudden increase of the feeding amount makes the grinding capacity of the steel balls unable to adapt to the increased feeding amount in time.

The properties of the grinding material change, such as the particle size becomes larger, the hardness becomes larger, etc. If the feeding amount is not reduced in time, a large number of unqualified materials will be caught in the gaps of the partition board, resulting in blockage, so that the materials cannot be discharged in time.

For new lubricating parts, after 30 days of oil injection, all oil should be poured out and new oil should be replaced. When refueling or changing oil in winter, the oil should be preheated to about 25 ℃.

In addition, if the parking time is long in winter, the three-way cock at the water inlet of the main bearing can be turned to the waterproof position, and the siphon action can be used to discharge the accumulated water in the spherical tile through the water channel, so as to avoid freezing and cracking of the spherical tile or the bearing seat.

The daily cleaning of the ultrafine vertical mill is mainly to prevent the ultrafine vertical mill from corroding, rusting, or even causing blockage and wear due to impurities, which in turn affects the daily production of the ultrafine vertical mill.

Therefore, it is necessary to maintain the "daily hygiene" of the ultrafine vertical mill equipment at all times to ensure that the operation room or machine room is free from dust accumulation, parts, materials and tools are stored neatly.

The lubricating oil used in each lubricating point is different, and the oil filtration and oil change time of the lubricating point are also different. For details, please refer to the vertical roller mill lubrication and replacement requirements table.

Vertical roller mill lubrication replacement requirements table serial number lubrication point lubrication method lubricating oil standard number oil change period 1 main bearing splash lubrication Winter: 46 # mechanical oil summer: 68 # mechanical oil 6-12 months 2 vertical roller mill size gear oil pool splash lubrication 220 # heavy Load industrial gear oil 6-12 months 3 reducer gears and bearings splash lubrication 18 # hyperbolic gear oil 6-12 months 4 motor bearing oil gun 3 # ordinary lithium grease 6-12 months 5 pinion bearing oil gun 3# Ordinary lithium base grease 6-12 months inspection content: 1.

Regularly observe the oil pressure gauge, generally the normal oil pressure is maintained at 0.05-0.15MPa, if the oil pressure difference before and after the filter cooler exceeds 0.04MPa , the filter needs to be cleaned in time.

During the use of the beneficiation vertical roller mill, problems such as wear, loose links, oil deterioration, and corrosion of the metal structure will inevitably occur between each link, which will cause the technical performance, economic performance and safety performance of the vertical roller mill to be reduced to varying degrees.

Therefore, in order to prevent and eliminate hidden dangers and ensure that the vertical roller mill is in good condition for a long time before the wear and tear of the various parts of the vertical roller mill has not reached the production efficiency, the vertical roller mill should be regularly maintained and maintained.

The maintenance and maintenance of the vertical roller mill is a routine operation, which can be combined with the maintenance of the vertical roller mill. Full-time personnel are required to carry out daily inspection, lubrication inspection and daily cleaning operations.

When installing the ultrafine vertical mill base, prepare some horns with uneven thickness in advance for backup. When installing the base, the main function of the horn is to adjust its position, and the number of horns should be guaranteed. Under normal circumstances, there is no looseness in the side knock of the base, which can be regarded as qualified.

Before installing the base, be sure to analyze the base of the ultrafine vertical mill in detail, and check whether it meets the relevant design requirements. Observe whether the main bearing chassis of the ultrafine vertical mill is on the center line, whether its coincidence exceeds 0.5mm, and the feed end should usually be about 1mm higher than the discharge end.

In addition, after the elevation bolts are tightened, the theodolite can be used to test the chassis to see if it is on the same level as the chassis.

For the concentrator, ensuring the stable performance of the calcium carbonate mill plays an important role in the production efficiency of the entire concentrator. In real production, there are many factors that affect the operation efficiency, service life and quality of use of the calcium carbonate mill, but the key lies in whether the calcium carbonate mill is properly installed and debugged.

The structure and working principle of the calcium carbonate mill Generally, the structural components of the calcium carbonate mill mainly include the feeding part, the discharging part, the main bearing part, the cylinder part, the transmission part, the base part, the main motor, the jacking device and the electric control box etc, these components make up a complete calcium carbonate mill.

At present, grid type calcium carbonate mill and overflow type calcium carbonate mill are more common types. These two calcium carbonate mills are mainly composed of working structure and transmission structure.

I believe that the problem of too much sludge in the pulp has troubled many people. Too much sludge will greatly affect the grinding efficiency of the limestone grinding process. In the practice of solving mineral processing problems for customers for many years, SBM has accumulated a very rich experience on the problem of excessive sludge.

Experience, let's briefly talk about how to deal with the problem of too much sludge in the slurry in the operation of the limestone grinding process.

Reduce and prevent the formation of ore slime: Multi-stage grinding process and stage beneficiation process can be used. It is necessary to correctly select the grinding and classification equipment to improve the efficiency of the classifier.

The temperature of the sliding bearing of the mini cement plant increases. During the operation of the mini cement plant, the head base of the mini cement plant slides and the temperature of the bearing suddenly rises. This phenomenon is mostly due to the sinking of the head base and the overall advance of the grinding body. And inclined, the spherical shoulder of the mini cement plant and the flange root of the hollow shaft pass through extrusion contact and rotational friction, which generates heat and causes the temperature to rise rapidly. This situation may cause the mini cement plant to tilt, and the meshing of the large ring gear and the pinion will form an axial angle, and the teeth will be cut with each other, which will increase the difficulty of meshing, cause loud noise and aggravate vibration, and in severe cases will cause the mini cement plant to stop. After the phenomenon occurs, it is necessary to stop the machine for inspection, weld and lengthen the grounded foot bolts, wedge the pads, and raise the bearing seat, which can control the temperature of the sliding bearing and the sound of the transmission part.

We all know that mini cement plant equipment is the equipment with a considerable investment in the entire concentrator, accounting for more than 50%. Therefore, ensuring the normal operation of the mini cement plant is a necessary condition to ensure the normal production of the entire concentrator. However, when the mini cement plant is used, some failures often occur, thus affecting its production efficiency.

So how to effectively solve or avoid the failure of the mini cement plant is an effective way to improve the efficiency of the mini cement plant. We have sorted out some common faults and spare parts faults of mini cement plants.

Today, the editor continues to sort out some sudden failures and solutions of mini cement plants for you. The sudden failure of the mini cement plant is generally caused by multiple reasons such as long-term high-speed operation, job responsibility and improper operation.

The stator coil of the mini cement plant is broken down in the whole system of the mini cement plant. There will be iron-containing dust in the air around the material. After a long time of operation, the iron-containing dust will adhere to the coil of the mini cement plant stator. Thickness will cause short-circuit discharge on the surface of the stator coil. When a short circuit occurs for many times, the insulator of the coil will be damaged, resulting in the phenomenon of ignition breakdown, which will cause the mini cement plant to stop running.

In the absence of a backup motor, it is difficult to continue the grinding work. So we can correlate this fault with the lack of cylinders in the car and find a solution. At this time, the breakdown coil should be cut off immediately, and scientific protection measures should be adopted, and the mini cement plant should be started again to continue production.

Check whether the dolomite powder machine meets the following debugging conditions. Whether the dolomite powder machine equipment is fully installed according to the drawings, and ensure that all parts of the equipment are in the correct position.

It is required to have a record of the complete installation process and to pass the acceptance inspection;

The strength of the basic concrete of the equipment and the strength of the secondary grouting concrete must reach the strength level required by the design;

The PLC control system, thermometer and pressure gauge of the dolomite powder machine can be reliably put into operation;

The dolomite powder machine is equipped with equipment for installation Completed, the grinding workshop system is complete;

The surrounding environment of the equipment is free of garbage and debris, and the scaffolding is removed;

Ensure that the water power, electricity, and communication facilities are complete;

Explosive materials, and equipped with corresponding fire-fighting facilities to prevent accidents;

Ensure that the amount of lubricant used during the operation of the dolomite powder machine is sufficient;

The mini cement plant is in an abnormal operation state, which will also bring adverse effects to the lining of the mini cement plant. When the mini cement plant is in normal operation, the steel balls and the material are mixed together, and when the steel balls are thrown to the lining plate, a barrier will be formed between the steel balls and the material, which plays a buffering role and gradually grinds the material.

If the mini cement plant is running at a low load, the steel balls will directly impact the liner, causing serious wear and even breakage of the mini cement plant liner. Countermeasures: Relevant staff need to understand the operation status of the mini cement plant and control the operation status of the mini cement plant.

When the mini cement plant is running under a low load state, it is necessary to adjust the ore input of the mini cement plant in time to ensure the grindability of the material. In addition to the four wear reasons described above, the design, manufacture and installation of the mini cement plant liner are also one of the reasons that affect the rapid wear of the mini cement plant liner.

In continuous operation, the lining plate and steel ball of the mini cement plant will be seriously worn, which is directly related to The Hardness Of The Material. The greater the hardness of the material, the faster the wear rate of the mini cement plant liner and steel balls, which may cause equipment damage or even safety accidents in severe cases.

In addition, it is also related to the steel balls of the mini cement plant. The size of the steel balls and the number of steel balls will affect the service life of the mini cement plant liner. If the mini cement plant is in operation, increasing the amount of steel balls or filling steel balls with larger diameters will increase the wear of the mini cement plant liner.

Countermeasures: Reasonable selection of the mini cement plant liner and steel balls is one of the main ways to reduce the excessive wear of the liner. First, the relevant staff need to know the ratio of the mini cement plant liner to the steel ball, and select the corresponding steel ball size and quantity according to the ratio.

Under normal circumstances, the hardness ratio of the liner of the conventional mini cement plant to the steel ball is about 1:0.8. Second, it is necessary to control the ratio of materials and steel balls, and it is advisable that the material is twice that of the steel balls.

Third, when choosing a mini cement plant, it is necessary to select the appropriate mini cement plant liner according to the type of minerals, control the hardness of the mini cement plant liner and the steel ball, and make a reasonable match between the steel ball and the liner.

Grinding efficiency, but also improve the energy-saving efficiency of the limestone grinding mill. However, grinding aids for limestone grinding mills should be added in accordance with the national standards. In general cement production process, the amount of grinding aids added should not exceed 1%. The proportion of grinding aids for other materials can be inquired through the national standards.

The gradation ratio of limestone grinding mill steel balls in common economical operating conditions: steel ball diameter mmΦ100Φ80Φ60Φ40Φ20 mass/total loading 7.5% 6.9% 33.5% 30.1% 22 Note: When the easy grinding performance of the material is poor, or the grinding requirements are relatively fine , the fill rate of a bin should be >28%.

The temperature of the material entering the limestone grinding mill is too high. Generally, when the temperature of the material entering the limestone grinding mill is too high, it is easy to reduce the grinding efficiency. When the temperature of the limestone grinding mill exceeds 100 °C, an air film isolated from each other on the surface of the small particles of the material will be damaged. damage, causing adhesion.

The grading of steel balls in bentonite milling machines is to achieve impact and grinding of materials with different particle sizes to improve grinding efficiency. Therefore, the gradation of steel balls in bentonite milling machines is very important, and the general gradation range is 25% ~ 35% %, but most of the intermediate grades in practical applications are 28% to 32%.

The gradation ratio of bentonite milling machine steel balls in common economical operating conditions: steel ball diameter mmΦ100Φ80Φ60Φ40Φ20 mass/total loading 7.5% 6.9% 33.5% 30.1% 22 Note: When the easy grinding performance of the material is poor, or the grinding requirements are relatively fine , the fill rate of a bin should be >28%.

The temperature of the material entering the bentonite milling machine is too high. Generally, when the temperature of the material entering the bentonite milling machine is too high, it is easy to reduce the grinding efficiency. When the temperature of the bentonite milling machine exceeds 100 °C, an air film isolated from each other on the surface of the small particles of the material will be damaged. damage, causing adhesion.

The bentonite milling machine is mainly responsible for the grinding operation of the beneficiation plant, which is the key link of the beneficiation process, and accounts for a considerable proportion of the capital construction investment and production cost of the entire beneficiation plant. At the same time, the bentonite milling machine is also the "bottleneck" operation link of the entire concentrator.
It is directly related to the overall processing capacity of the concentrator and has a significant impact on the economic and technical indicators of the entire concentrator. Therefore, ensuring that the output of the bentonite milling machine meets the standard is the top priority.
In the production of the dressing plant, it is a very common problem that the output of the bentonite milling machine fails to meet the design requirements. Then, under what circumstances will the output of the bentonite milling machine fail to meet the standard?
Unreasonable design of the length ratio of each bin of the bentonite milling machine. The unreasonable length ratio of each bin of the bentonite milling machine will cause the imbalance of the coarse and fine grinding capabilities of the bentonite milling machine, resulting in the phenomenon of over-coarse or over-fine products, which will affect the output.

The force distribution should be greater than 70%. When running empty, if the lubricating oil system works normally and no oil leakage occurs, the dolomite powder machine runs smoothly without obvious noise, the vibration value of the main bearing, motor and pinion does not exceed 0.1mm, and there is no obvious damage or hot phenomenon of each part. The empty car runs normally.

During the test run of the dolomite powder machine under load, according to the proportion of the dolomite powder machine, a certain amount of steel balls are added to the barrel of the dolomite powder machine, and the steel balls are added in batches. During the operation process, the bearing temperature, current, and vibration intensity are measured.

After the dolomite powder machine is installed, start running with load, add 70% of the specified load to the grinding material, and continue to run for more than 10 hours. During the process, the threaded joints of the dolomite powder machine lining should be tightened and the threaded connections should be checked frequently to prevent loosening.

When the dolomite powder machine is running empty, let the motor run for 2 hours under the condition of no load of the dolomite powder machine. During this period, ensure that the motor rotates in the correct direction and the accident button works normally and reliably to ensure safety. If the motor runs normally when idling, the reducer should be idling for 2 hours.

Connect the reducer and the pinion coupling, install the protective cover, start the lubricating oil system and the cooling water system. Turn on the power of the dolomite powder machine, after the rotation is normal, press the accident button to stop, and check the main bearing, motor, and gears to determine whether the dolomite powder machine rotates in the correct direction.

If there is no abnormality, start the dolomite powder machine to run for 8 hours. During the trial operation, check the heat generation of the dolomite powder machine bearing seal, the lubricating oil temperature and pressure, and the temperature should be controlled between 40-50 °C. If there is any abnormality, stop cooling immediately.

The inspection work before the debugging of the vertical roller mill is required to be meticulous and keep the equipment in good condition. The details are as follows: the sector block and bearing bush of the lower bearing seat should be aligned with the center line;

The large gear and the pinion should be aligned according to the instructions. The sector block of the lower bearing seat, the bottom plate of the pinion, the bottom frame of the main gear and the bottom frame of the motor are completely grouted, and the grouting strength meets the design strength requirements.

All anchor bolts, connecting bolts and main gear pressing bolts should be tightened. The fixing bolts of the large gear should be tightened according to the specified torque. The bearing bush should be installed on the fan-shaped block of the bearing seat according to the rotation direction of the vertical roller mill;

The bearing bush should be corrected according to the axial guide ring;

The bearing seat seal is installed correctly, and the joint point is sealed with sealant. All lubricating points of the vertical roller mill are given sufficient amount according to the lubrication requirements;

The vertical roller mill is an indispensable equipment in the concentrator, and it is also a very critical equipment in the construction of the entire concentrator. Therefore, it is very important to ensure the stable operation of the vertical roller mill.

However, before it is officially put into operation, the debugging of the vertical roller mill is a very important step, and there can be no deviation at any point, otherwise the particle size of the vertical roller mill product will not meet the requirements, and even the metal recovery rate will be reduced. So how to debug the vertical roller mill? Let's see how vertical roller mill does in the debugging process.

The debugging of the vertical roller mill should confirm whether the debugging conditions are met, run empty and under load, and check the status of all aspects of the equipment.

Check whether the vertical roller mill meets the following debugging conditions. Whether the vertical roller mill equipment is fully installed according to the drawings, and ensure that all parts of the equipment are in the correct position.

It is required to have a record of the complete installation process and to pass the acceptance inspection;
The strength of the basic concrete of the equipment and the strength of the secondary grouting concrete must reach the strength level required by the design;
The PLC control system, thermometer and pressure gauge of the vertical roller mill can be reliably put into operation;

Grinding ore is usually carried out in a mill. There are many types of mills, but vertical roller mills and rod mills are generally used in metal mines. Gravel mills and autogenous mills have been gradually applied in China in recent years.

The vertical roller mill hydraulic system is a rotary cylinder with hollow shafts at both ends, and a considerable number of steel rods and steel balls are installed in the cylinder. When ore and water are fed into the cylinder from the hollow shaft at one end, and discharged from the hollow shaft at the other end.

When the vertical roller mill cylinder rotates at a specified speed, the steel balls and steel rods are together with the ore. Under the action of centrifugal force and frictional force, they rise to a certain height with the cylinder, and then they are thrown away from the cylinder wall and slide down.

Then they rise to the same height with the cylinder, and then fall down, periodically, so that the ore is crushed by impact and grinding. The ground ore and water form ore slurry (wet grinding), which is discharged from the hollow shaft at the discharge end to complete the grinding operation.

The main component of quartz stone is silica, which has good oxidation resistance, high temperature resistance, corrosion resistance, and stable physical and chemical properties. It is a commonly used industrial mineral raw material and has a wide range of applications.

Quartz stone is generally processed into powder and is used more, and a quartz ultrafine vertical mill is required. With the development of the industry, the demand for ultra-fine powder is getting higher and higher, and the machine that can grind the ore into 1000 mesh is also more common. So what is the output of the 1000-mesh quartz ultrafine vertical mill per hour? How much is it? Let's introduce it in detail.

The 1000-mesh quartz ultrafine vertical mill recommends ultra-fine mill. It is a new generation of mill. It has been upgraded in terms of output, finished product fineness, performance, etc., which can bring you uniform fineness and large output. It is more guaranteed to choose 1000 mesh quartz stone powder for fine processing of quartz stone powder.

ultrafine vertical mill: https://www.oremillingplant.com/grinding-mill/lum-vertical-roller-mill.html

With the continuous development of the mining machinery industry, the functions of various ores have been widely developed. Calcite also plays an increasingly important role in our production and life, and the demand is increasing.

Especially in recent years, the development of my country's chemical, cement and other industrial raw material industries has prompted the continuous improvement of calcite mills and is widely used in various industrial production.

Calcite is used as a flux in the metallurgical industry, and is used in the construction industry to produce cement and lime. Filling additives in plastics, paper, toothpaste and food. If calcite is added to the glass production, the resulting glass will become translucent, especially suitable for making glass lampshades.

In addition to the concentrator, it can also be used for grinding cement, silicon hydrochloric acid products, new building materials, refractory materials and glass ceramic materials. The cement raw material milling liner is one of its main accessories. 

First, the function of cement raw material milling lining plate is to protect the cement raw material milling cylinder from direct impact and friction by grinding medium and materials.

Secondly, there are many different forms of cement raw material milling liner, which can be used to adjust the motion state of grinding medium in the cylinder to enhance the grinding effect of grinding medium on materials and improve the grinding efficiency.

However, high manganese steel lining plate is rarely used now. Although it has sufficient impact toughness, cold hardening of the surface when subjected to a certain impact, it is more hard and wear-resistant, its processing technology requirements are very high and the price is expensive.

First, the function of cement raw material milling lining plate is to protect the cement raw material milling cylinder from direct impact and friction by grinding medium and materials.

Secondly, there are many different forms of cement raw material milling liner, which can be used to adjust the motion state of grinding medium in the cylinder to enhance the grinding effect of grinding medium on materials and improve the grinding efficiency.

Material and application of cement raw material milling lining plate the materials of cement raw material milling lining plate mainly include high manganese steel, alloy steel, hard steel, chromium steel, alloy cast iron, magnetic lining plate, rubber lining plate, etc.

Ultrafine mill is a common grinding equipment in concentrator. Compared with other calcite grinder milling plant machine equipment, it can save energy and reduce consumption by 30%. For fine-grained mineral processing, it can increase the processing capacity by 15 ~ 20% compared with other calcite grinder milling plant machine equipment.

In the cylinder, the materials are crushed due to the throwing impact and self grinding of the steel ball and the ore itself. Due to the continuous feeding of materials, the pressure causes the materials in the cylinder to move from the feeding end to the discharge end, and the materials reaching the particle size of finished products are discharged from the discharge end of the cylinder.

Friction is greatly reduced, easy to start and significant energy saving; The discharge end adopts conical design, and the materials and steel balls at the discharge end are graded, which not only increases the volume, but also forces the cone closer to the discharge port and the smaller the diameter of the steel ball, increasing the effect of repeated grinding;

The barite ore grinding plant commissioning must be completed by the commissioning team, and equipped with corresponding professional technicians such as instruments, electrical appliances and equipment, as well as fitter, plumber, electric welding, electrical appliances and other relevant staff to participate in the commissioning task, so as to fulfill their respective responsibilities and obey the command.

After the barite ore grinding plant idles for the specified time, stop the barite ore grinding plant, carefully check all working parts, tighten the lining plate bolts and eliminate the defects found. After there is no problem with the barite ore grinding plant idling, the load test run can be carried out.

Clean up sundries inside the barite ore grinding plant and ensure that rotating parts do not collide with each other. There are good protective measures for the inlet and outlet shafts of each coupling.

After starting the barite ore grinding plant, ensure that there are no people standing on both sides of the equipment. Carefully check the cooling system of high-low lubrication station and main bearing, and ensure normal operation through test.

After starting the barite ore grinding plant, ensure that there are no people standing on both sides of the equipment. Carefully check the cooling system of high-low lubrication station and main bearing, and ensure normal operation through test.

Before the initial operation, the high-pressure and low-pressure lubrication device shall be started, and the high-pressure system shall float the cylinder to ensure the production of oil film with sufficient strength.

At the same time, cooling water shall be opened for bearing cooling. After the inspection, the barite ore grinding plant commissioning can be carried out.

Generally, the barite ore grinding plant commissioning is divided into no-load commissioning and load commissioning.

The grit nozzle is sprayed or rope-shaped. Under normal circumstances, the aggregate crushing value conclusion grit is discharged in an umbrella shape. 

The grit angle is between 10°-20°, and the concentration reaches about 75%, which is ideal for aggregate crushing value conclusion. 

If the grit nozzle is spray-like, the spreading angle of grit is too large, indicating that the size of the grit nozzle is too large. 

If the grit nozzle is in a rope shape, it may be because the concentration of the ore feed is too high, the size of the grit nozzle is too small, the grit nozzle is partially blocked or the slurry density is too low. When the grit nozzle is spray-like, it can be adjusted by replacing the small grit nozzle.

The high underflow concentration may be caused by the feed slurry concentration or the ultrafine vertical mill underflow opening is too small. You can add an appropriate amount of water to the feed first. If the underflow concentration is still large, you need to replace the larger underflow opening.

If the underflow is discharged in an "umbrella shape", but the underflow concentration is less than the production required concentration, it may be caused by the low feed concentration. At this time, the feed concentration should be increased.

The "fine underflow clamp" may be caused by the underflow orifice wear, the underflow orifice is too large, the overflow pipe diameter is too small, the pressure is too high or too low, it is necessary to adjust the pressure first, and then check whether the underflow orifice is worn or replaced A small underflow port is gradually adjusted to normal production state.

LUM ultrafine vertical mill is a more effective fine-grain classification equipment among the current grinding equipment. In daily production, LUM ultrafine vertical mill more or less will have some equipment failures. If it cannot be found and solved in time, it is likely to cause LUM ultrafine vertical mill to stop.

So, what are the common failures of LUM ultrafine vertical mill in daily operation? How can we solve these failures? This article starts with five common faults and analyzes their causes and countermeasures.

Large fluctuations in the feed pressure During the production process, the feed pressure will affect the processing capacity and grading particle size of the LUM ultrafine vertical mill.

The grinding concentration is high, and the materials are easy to be around the steel ball, which enhances the impact and grinding effect on the materials, but the pulp flow is slow, which is easy to cause over grinding.

In production practice, the grinding concentration is controlled by controlling the ore feeding amount of vertical roller mill, the replenishment amount of vertical roller mill, or adjusting and controlling the particle size composition and water content in graded return sand, so as to help improve the grinding efficiency of vertical roller mill.

Optimize the grinding process according to the ore properties of the raw ore (embedded particle size of useful minerals, monomer dissociation degree, embedded particle size of gangue minerals), such as pre tailing, pre enrichment, stage grinding and pre classification.

The grindability is small, indicating that the raw ore is easy to grind, the wear to the ore milling plant liner and grinding medium is relatively small, and the energy consumption is low; The large grindability indicates that the raw ore is difficult to grind, the wear to the ore milling plant lining plate and grinding medium is also large, and the energy consumption is high.

This shows that the grindability of raw ore will directly affect the grinding efficiency of ore milling plant.

Therefore, in production, when the raw ore is difficult to grind and the particle size is required to be fine, we can take certain measures to enhance the grindability of the raw ore under the condition of economy and site permission, such as adding chemicals in the grinding process to increase the grinding efficiency; Or work hard on the grindability of raw ore: heating minerals in raw ore, reducing hardness, etc.

This method can improve the chemical reaction activity of roasted products, greatly improve the whiteness of calcite, and obtain high-grade calcite grinder milling plant machines.

However, the disadvantage of roasting purification is high energy consumption and easy to cause environmental pollution.

It is difficult to obtain high-grade calcite grinder milling plant machines only through a single process.

Therefore, in the actual production, it is recommended that the mine owners select qualified manufacturers for beneficiation test, and adopt a combination of multiple processes to improve the product quality of calcite.

Centrifugal concentrators are usually used to remove high-density impurities. The hydrocyclone group can also be used to complete the washing and screening operation in the separation of silica sand.

It can not only achieve the purpose of washing and classification, but also remove some impurities, which has good application value. However, it is difficult to obtain qualified silica sand products by gravity separation, and the final qualified products still need to be obtained by magnetic separation, flotation, calcination and other methods.

Silica sand grinding mill almost all silica sand raw ores contain a small amount of iron minerals, generally 0.5% - 3%, mainly including colored impurities such as magnetite, ilmenite, siderite and pyrite.

The working efficiency of ultrafine vertical mill has a significant impact on the operation efficiency of the whole concentrator.

Whether the grinding particle size is qualified or not directly affects the subsequent beneficiation operation, and the qualified rate of grinding particle size is closely related to the feeding particle size. The relationship between feeding particle size and ultrafine vertical mill is introduced below.

When the fineness requirements of grinding products are the same and the feeding particle size is large, the production capacity of ultrafine vertical mill is low; If the feeding particle size is small, the production capacity of ultrafine vertical mill is high.

Improper installation causes misalignment of the coupling and non levelness of the bearing seat. The alignment of the coupling or split bearing seat is not adjusted well, and the alignment accuracy is poor. The bearing of vertical roller mill is in a distorted state in the initial state.

The alignment of the coupling shall be in accordance with the requirements of the general code for construction and acceptance of mechanical equipment installation engineering (gb50231-2009), determine the maximum allowable value of radial displacement and inclination according to the diameter of the coupling, and correct it according to this value.

During installation, the free end bearing does not leave enough thermal expansion, so that this end bearing cannot extend freely during operation, resulting in the bearing bearing bearing large axial force, heating and even burning out.

During the use of ore milling plant, many users find that their ore milling plant will produce bearing heating. Some heating phenomena occur in the initial running in period and return to normal after running for a period of time; Others last for a long time and have a great impact on production. Today, we mainly introduce the causes of heating of ore milling plant bearing.

Ore milling plant is a heavy-duty equipment. It is started with heavy load. During operation, the load is heavy and there is impact load. Therefore, special attention should be paid to two aspects when selecting rolling bearings:

(1) Load selection of bearing. If the selected bearing has low rated load and serious bearing wear during operation, it will cause bearing heating and shorten service life.

(2) Selection of bearing clearance. Too small clearance is not conducive to the formation of oil film and the elimination of thermal expansion. Especially when the ambient temperature is high, too small original radial clearance will make the clearance of the bearing smaller or even zero due to the expansion of temperature rise during operation, which is easy to cause bearing heating.

If the feed particle size is large and the discharge particle size is small, two-level milling or multi-level milling is often required. Different milling levels also have certain requirements for LM vertical roller mill types.

Generally, vertical roller mill is often used as primary mill, while counterattack vertical roller mill, conical vertical roller mill and hammer vertical roller mill are used as secondary mill or even tertiary mill.

Consider the impact of material water content on milling productivity. When the water content is too large, fine-grained materials will agglomerate or stick to coarse-grained materials due to the increase of humidity, so as to increase the viscosity of materials.

When a certain viscosity is reached, the materials will be bonded in the vertical roller mill inlet and milling chamber, which greatly reduces the ore discharge speed, aggravates the blockage of inlet and outlet, and reduces the productivity.

Determine the required vertical roller mill model and milling level according to the incoming and outgoing material particle size.

Different types of vertical roller mill feed ports are different, and their model size also determines the size of the feed port, which requires the vertical roller mill manufacturer to produce according to the particle size of the material to be milled by the concentrator.

If the content of coarse particles (large dry outlet size) in the feed is high, the required milling is relatively large, which will affect the productivity and cause blockage to a certain extent; When the content of fine particles (close to or less than the outlet size) is large, the milling to be realized is relatively small, so its productivity will be improved accordingly.

If the height difference between the end face of the bearing seat and the end face of the bearing is too small, the positioning boss on the sealing gland will lose its fixed positioning function, resulting in the non concentricity of the sealing gland and the bearing, resulting in the failure of the sealing function of the sealing gland and oil rejection.

Check the vibrator regularly to prevent the vibrator from sliding; Select lubricating oil with high viscosity to reduce oil rejection. The service life of vertical roller mill surface is short, and the main factors affecting the aging of screen surface are screen surface structure, material and tightness.

At present, many vertical roller mills use polyurethane screen surface. Reasons and Countermeasures: on the one hand, the anti-aging property of polyurethane itself is not high.

On the other hand, if the staff do not tighten the screen surface when installing the screen surface, that is, when installing the screen surface, only both sides of the screen surface are fixed and the middle is not fixed, the screen surface and bracket will collide and rub up and down continuously during operation.

If the tension of the triangular belt of the barite ore mill is too large, the additional bending moment of the shaft and the synthetic moment will be increased.

The stress in the working process of the belt will increase significantly, even exceed the allowable stress of the shaft, which will directly lead to the destruction of the shaft. Therefore, the tension of V-belt needs to be adjusted in time.

It is suggested that the tension of V-belt should be reduced as much as possible on the premise of ensuring normal transmission. Of course, this phenomenon can be avoided by changing to flexible connection.

LUM ultrafine vertical mill feeds mainly through feeding materials to the mine department, and the main function of the feeding department is to quickly feed materials and graded returned sand into the LUM ultrafine vertical mill.
During the operation of the LUM ultrafine vertical mill, it is necessary to ensure uniform ore feeding. The so-called uniform ore feeding means that the number of ore feeding is stable and the particle size composition of the ore feeding remains unchanged.

So how important is the uniformity of the LUM ultrafine vertical mill? If the ore is not fed in proportion, if the feeding amount is appropriately increased, the grain size of the mill product will become coarser and the amount of returned sand will increase.

All users must understand the basic knowledge of the equipment in detail before purchasing the equipment, and then conduct comprehensive analysis and summary, so as to buy a satisfactory ideal barite grinding mill model.
Although the production efficiency of barite grinding equipment is very high, for all users, it is necessary to understand the basic properties of grinding raw materials before purchasing, and have a detailed understanding of the hardness, humidity and water content of raw materials, and then purchase according to the statistics of these elements, so as to purchase purposefully, To buy a high-quality barite grinding mill in a short time and reduce the chance of being cheated.

When purchasing barite grinding mill, you must find professional well-known manufacturers, so that the product quality produced by such manufacturers will be more guaranteed.

In reality, many users only pay attention to the price of the equipment and blindly crave for cheap.

Influence of materials on vertical roller mill grinding efficiency is mainly reflected in material properties and grinding particle size.

Different ores have different properties and hardness, and the corresponding grinding process should also be different. For example, fluorite, tin ore and other ores that are easy to be crushed are different from other ores.

Attention should be paid to over grinding in ball milling. The coarser the grinding particle size, the longer the time required for grinding to the separation stage, and the greater the loss of grinding equipment.

At present, more crushing and less grinding is one of the main principles of concentrator design and production. For ores of the same nature, the higher the content of fine particles in the grinding products, the higher the grinding efficiency.

After the installation of the calcite grinder milling plant machine and before it is officially put into production, it is necessary to carry out strict commissioning of the newly installed calcite grinder milling plant machine.

The commissioning of calcite grinder milling plant machine is of great significance to the grinding stage and the whole concentrator.

By observing and analyzing the commissioning and operation of the calcite grinder milling plant machine, on the one hand, it can test whether the newly installed calcite grinder milling plant machine can operate normally.

Generally, when the ball is initially loaded, the steel ball ratio of cement raw material milling shall be determined according to the value given by the manufacturer.

After the lining of cement raw material milling is worn to a certain extent, the content product of cement raw material milling will increase due to the decrease of lining plate thickness, which will reduce the output, resulting in the discharge and stone discharge of cement raw material milling.

In order to maintain a reasonable filling rate and ensure the output of cement raw material milling, it is necessary to increase the steel ball quantity of cement raw material milling, generally 5% ~ 15%.

In addition, when replacing the lining plate in the later stage, the steel balls shall be screened, and the broken steel balls and small-diameter steel balls shall be cleaned in time.

During vertical roller mill operation, periodic inspection, maintenance and other operations shall be carried out according to the regulations.
During the operation of vertical roller mill, the problem of excessive bearing temperature is not only due to the reasons mentioned in the appeal, but also due to poor bearing quality or improper bearing selection.

In order to solve the problem that the temperature of vertical roller mill is too high, in addition to finding and solving problems in time, attention should also be paid to the purchase and selection.

It is recommended to choose a reliable and reputable manufacturer in order to improve the operation efficiency of vertical roller mill.

The Raymond mill mostly operates in wet environment, but it is not protected from dust.
When some fine dust enters The Bearing Seat Of Raymond Mill running at high speed, the lubricating oil in the bearing seat will deteriorate and the quality will deteriorate, resulting in the wear of Raymond mill bearing.

When the Raymond mill bearing runs in the worn state, it will increase the friction and heat, resulting in an increase in the temperature of the Raymond mill bearing.

Solution: the Raymond mill bearing is worn due to lubricating oil, so it is necessary to clean the Raymond mill bearing housing and bearing during maintenance, and check and dredge the refueling pipeline; Ensure that different types of grease are not mixed; If the lubricating oil of other models is replaced, the original lubricating oil shall be cleaned and replaced.

Note: moisture proof and dust-proof measures shall be taken for grease storage, and lubricants of the same brand and model shall be selected as far as possible.

The reasons for the high material level in the vertical roller mill are as follows: first, the reduction of water material ratio reduces the carrying capacity of water, resulting in the increase of material level in the mill; Second, the inlet material diameter is too large, which increases the residence time of the material in the vertical roller mill, resulting in too high material level in the vertical roller mill.
In order to ensure the stable and efficient operation of the equipment, in addition to selecting the type of equipment in line with the beneficiation process, daily maintenance and repair are particularly important.

Therefore, it is recommended that the mine owners consult the equipment manufacturers with the qualification of the overall concentrator when selecting the vertical roller mill, and select the equipment suitable for their own process flow, so as to fundamentally ensure the production efficiency and economic benefits of the whole concentrator.

The amount of water flowing through the cylinder of the LM vertical roller mill should correspond to the material throughput of the LM vertical roller mill and be controlled within an appropriate range.

The water flowing through the cylinder of the LM vertical roller mill is mainly composed of the carrying water and the underflow of the cyclone.

Under normal conditions, the bottom water flow of the hydrocyclone generally remains unchanged, but the premise is to ensure that the bottom flow sand setting nozzle of the hydrocyclone is free of wear.

When the bottom flow sand setting nozzle of the hydrocyclone is worn, the working conditions of the hydrocyclone itself change, which will increase the bottom water flow of the hydrocyclone and reduce the top flow overflow, resulting in an increase in the water entering the LM vertical roller mill.

When the inner liner of the ore milling plant is damaged or falls off, obvious impact sound can be heard locally.In case of such situation, stop the ore milling plant as soon as possible and deal with the damaged liner immediately, so as to avoid large-scale damage to the liner of the ore milling plant.

Slurry is easy to be thrown out at the outlet of the ore milling plant.During normal operation of the ore milling plant, slurry flows out of the outlet sundry pipe and is mixed with small stones.

The water material ratio in the ore milling plant is out of regulation, and the amount of water flowing through the cylinder of the ore milling plant is an important parameter in operation, and its size reflects the carrying capacity of solid particles in the ore milling plant.

The high wind pressure causes the fan to heat, which makes the fan temperature too high. During the operation of barite ore grinding plant, unconscious touch may cause the wind pressure of the fan to change, resulting in motor heating. When the fan temperature is too high, it will seriously affect the normal operation of barite ore grinding plant. Therefore, avoid such situations when using barite ore grinding plant.

Due to the equipment itself, for example, the equipment quality is not qualified, which requires users to carefully select large brand and high-quality equipment, such as Zenith barite ore grinding plant. In fact, normal maintenance is also very important, so Zenith suggests that you carry out regular maintenance on barite ore grinding plant to prolong the service life of the equipment.

Zenith specializes in producing Raymond Mill powder machine for more than 20 years, continuously introduces advanced technology at home and abroad, improves and develops barite ore grinding plant, and strives to provide customers with reasonable barite ore grinding plant equipment.

Many people don't know how to solve this problem. Next, Zenith will explain to you the solution to the problem of too high temperature in Raymond mill. When the temperature of Raymond mill is too high, we need to find out the cause of the temperature rise first, and then apply the medicine to the case.

The temperature in Raymond Mill cabin is too high, mainly because a lot of friction and pressure are required to grind materials during milling, so how to reduce friction is the top priority. Zenith suggests that customers regularly add high-performance lubricating oil to bearings, grinding rollers and other parts, which not only solves the problem of friction heating, but also increases the flexibility of various parts and improves the production capacity of Raymond mill.

Pay attention to ventilation. The external air can be removed at the dust removal position to make the external air flow convection with the air flow in the cabin, so as to slowly reduce the temperature in the mill room. If necessary, a high-power exhaust fan can be installed for indoor cooling.

When it is found that the vibration sense of the vertical roller mill is strong, the fault cause can be analyzed from the vibration frequency. The vibration feeling is not obvious, which is mostly caused by the dislocation or damage of the indenter.
It is necessary to check the pressurizing device and replace the indenter in time to reset it; When it is found that the vibration sense of the vertical roller mill is strong, it is mostly caused by poor infrastructure, large steel blocks or large hard materials in the vertical roller mill, damage to transmission gears and bearings, etc.

After the problem is diagnosed, appropriate treatment measures can be taken. When it is found that the foundation of the vertical roller mill sinks locally, it is mainly caused by the uneven foundation construction, so it is necessary to stop the machine for treatment and add cushions to make it reach the level; When the vibration of the vertical roller mill often intensifies suddenly, the current changes little with impact sound, and the current increases.

It is very necessary to diagnose the operation state of vertical roller mill equipment, the causes of deterioration and the changes of operation information.
The diagnosis is mainly to compare various symptoms and standards of the vertical roller mill in operation to judge whether the vertical roller mill is in normal operation, so as to find out the causes and eliminate the problems in time before the failure, or predict the operation state of the vertical roller mill according to some symptoms and find the corresponding relationship between performance change and structure change, To make scientific judgments and decisions in order to prevent accidents.

Vertical roller mill diagnosis results and treatment methods for the fault diagnosis of vertical roller mill equipment, many faults will have omens before they occur, such as vertical roller mill sound change, vertical roller mill amplitude change, vertical roller mill temperature change, etc.

When the wear reaches the upper limit, it shall be repaired or replaced in time.

If the pinion surface is found to be rough, it can be polished manually to reduce the roughness of the gear surface; If the big gear is seriously worn, due to its high cost, it can be repaired or turned over to continue to use, which can not only prolong the service time, but also reduce the investment of the big gear.

In this regard, SBM will configure corresponding vertical roller mill gears according to the needs and requirements of users, and adopt international well-known brands for supporting manufacturing, which can not only effectively ensure the efficient and stable operation of vertical roller mill, but also greatly reduce various problems of vertical roller mill.

The selection of lubricating oil and lubrication mode is not only an important means to ensure the normal operation of barite ore grinding plant gear, but also a necessary condition for noise reduction and wear reduction.

In the concentrator, the technicians chose barite ore grinding plant gear lubrication at random, and did not choose to use it respectively according to the different service characteristics and effects of different lubricating oils, nor did they choose the lubricating oil correctly according to the actual use situation on site.

This will lead to the insufficient viscosity of the lubricating oil during the operation of barite ore grinding plant gear, which can not effectively form a protective oil film, resulting in the wear of barite ore grinding plant gear.

In addition, there are still a few concentrators that use inferior lubricating oil as good, and use waste diesel oil as lubricating oil, which not only can not play the role of lubrication, but also accelerate the wear of barite ore grinding plant.

Compared with the existing drive system, zenith barite grinding mill's innovative drive system has the following characteristics:

(1) cancel the deceleration link of the reducer: reduce the intermediate transmission link, improve the equipment operation rate and reduce the equipment operation cost, and has the advantages of low noise and improving the on-site environment

(2) Large starting torque: stable starting, with a starting torque multiple of more than 1.8.

(3) High efficiency and energy saving: the motor efficiency reaches the level I energy consumption(IE4) standard, and the comprehensive power saving rate reaches 10 ~ 40%

(4) Variable frequency speed regulation: the speed can be adjusted according to the on-site working conditions to make the equipment reach a good running state

(5) Vector control technology: small starting current, no impact on power grid and equipment

(6) High power factor: the power factor reaches 0.94 ~ 0.99, which reduces the loss of power supply line and improves the service efficiency of transformer

(7) Small size: small floor area, convenient installation and increasing the distance of safety passage.

In the preparation stage of commissioning, Zenith commissioning staff carefully inspected Raymond mill.

The main contents of the inspection are as follows: 1. There are no sundries inside Raymond mill cylinder.

2. The fastening of Raymond mill and the connecting bolts are tightened.

3. The rotating parts shall not collide with other objects.

4. Heating and cooling, main bearing cooling water system, no water leakage.

5. There is no oil leakage in the lubrication station.

It is necessary to inject sufficient grease into the sealing ring cavity of Raymond mill main bearing to ensure the lubrication of the main bearing.

The frequent fluctuation of more time and less time will affect the final grinding effect.

Raymond mill operation criterion 2: large sand return refers to coarse-grained particles returned by the grading equipment to Raymond mill for regrinding during closed-circuit grinding.

Generally, the return ore volume is often several times more than the original feed ore volume. We call the ratio between the return sand volume and the raw ore volume as the return sand ratio.

The "large sand return" here requires us to maintain the "ideal sand return ratio" during Raymond mill operation. Practice has proved that the return sand ratio will directly affect the production efficiency of Raymond mill.

When the return sand is large, the increase of Raymond Mill total ore feeding accelerates the discharge speed of Raymond mill, shortens the residence time of ore in the cylinder and speeds up the circulation.

In addition, there are many reasons for the low output of vertical roller mill operation.

Finding and solving the problems in time is one of the ways to improve the grinding output of vertical roller mill operation.

In addition, completing various operations and daily maintenance of vertical roller mill operation in strict accordance with the design requirements of vertical roller mill operation is also an effective way to ensure the grinding output of vertical roller mill operation.

However, vertical roller mill operation grinding aid shall be added according to the amount specified in the national standard.

Generally, in the process of cement production, the amount of grinding aid shall not exceed 1%. The proportion of grinding aid for other materials can be queried through the provisions of the national standard.

Under normal operation, due to the repeated impact and friction of the medium in the cylinder, the temperature in the mill increases continuously, resulting in the generation of water vapor for water containing materials.

If the ventilation effect of silica sand mill is not good, the water vapor cannot be discharged in time, and the water vapor will adhere to the silica sand mill liner and steel ball, resulting in ball paste or grinding.

Therefore, it is necessary to control the ventilation volume of silica sand mill.The passing effect in silica sand mill is good.It can not only bring out qualified fine materials in time, but also effectively reduce the phenomenon of over crushing and reduce the temperature of silica sand mill.

Unreasonable grinding aid dosage LM vertical roller mill grinding can add a small amount of grinding aid without damaging the product performance, which can not only accelerate the crack propagation in material grinding, reduce the mutual adhesion between fine powders, effectively improve the grinding efficiency, but also improve the energy-saving efficiency of LM vertical roller mill.

However, LM vertical roller mill grinding aid shall be added according to the amount specified in the national standard. In the general cement production process, the addition amount of grinding aid shall not exceed 1%.

The proportion of grinding aid for other materials can be queried through the provisions of the national standard. The above are the common problems that lead to the substandard output of LM vertical roller mill. In addition, there are many reasons for the low output of LM vertical roller mill.

 

Finding and solving the problems in time is one of the ways to improve the grinding output of LM vertical roller mill. In addition, completing various operations and daily maintenance of LM vertical roller mill in strict accordance with the design requirements of LM vertical roller mill is also an effective way to ensure the grinding output of LM vertical roller mill.

LM vertical roller mill has poor ventilation. Under normal operation, due to repeated impact and friction of media in the cylinder, the temperature in the mill continues to rise, resulting in water vapor generated by water containing materials.

If LM vertical roller mill has poor ventilation effect and the water vapor cannot be discharged in time, the water vapor will adhere to the lining plate and steel ball of LM vertical roller mill, Cause paste ball or paste grinding. Therefore, it is necessary to control the ventilation volume of LM vertical roller mill.

The passing effect in LM vertical roller mill is good, which can not only bring out qualified fine materials in time, but also effectively reduce over crushing and reduce the temperature of LM vertical roller mill.

The feeding of LM vertical roller mill is unreasonable. During the operation of LM vertical roller mill, uniform feeding is a necessary condition to ensure the normal operation of LM vertical roller mill.

China has always advocated that while promoting the rapid development of the country, we should pay attention to environmental protection and take the road of sustainable development. The same is true for industries that advocate an environment-friendly society. 

For example, a number of cement industries were banned and merged last year, which greatly reduced China's environmental pollution. As we all know, the mining machinery industry is also an industry with high energy consumption and high pollution. In order to develop well, we must take the green environmental protection route. 

Therefore, as an ultrafine mill equipment to promote the development of milling industry, it is necessary to put & ldquo; The concept of "green" is introduced into its production and development. In addition, this is the inevitable trend of the future development of the machinery industry, not only in the future, but also at present. 

The crushing method adopted by the new vertical roller mill is shear type. During operation, the materials will be sent to the position where the grinding ring is installed between the static disc and the moving disc. 

Once the moving disc of mill rotates, the grinding ring will gradually cut the materials. According to the different needs of production, the installation accuracy and speed of the motorized stationary plate of vertical roller mill can be adjusted reasonably, which will minimize the damage to equipment and the waste of materials in the production process.

Fly ash has the characteristics of high strength, so it is very important to select a suitable grinding equipment in fly ash production. Compared with the traditional grinding equipment, the new vertical roller mill has great advantages both in terms of material strength and overall output. The materials produced by the new vertical roller mill have uniform fineness and smooth appearance, and the concrete produced by mill will have higher strength.

For example, the prices of ultra-fine mill and jaw crusher are different; The price of 300 mesh small ultra-fine mill is different from that of 200 mesh small crusher. The price of mills with more than 300 mesh is another level. We often budget the price according to the overall configuration of the mill.

In an ore production line, many kinds of equipment are needed, including crusher, ultrafine mill, screening equipment and other auxiliary equipment. Crushers are divided into many types, such as jaw crusher, impact crusher, roller crusher, cone crusher and so on. 

Grinding machine is divided into ultra-fine grinding, T-shaped grinding and so on. According to the required material fineness, customers need to choose different mills. The price difference is also shown here. Correctly budgeting the cost of an ore production line can help customers better grasp their investment and income.

All users must have a detailed understanding of the basic knowledge of the equipment before purchasing the equipment, and then conduct comprehensive analysis and summary, so as to buy a satisfactory ideal barite ore grinding mill model.

When purchasing barite ore grinding mill, you must find professional well-known manufacturers, so that the product quality produced by such manufacturers can be more guaranteed. In reality, many users only pay attention to the price of equipment and blindly crave for cheap.

Therefore, when purchasing barite ore grinding plant, it is necessary to compare, select well-known manufacturers, and pay attention to after-sales service, so that it can be repaired in time in case of equipment failure, reducing a lot of trouble. The principle of barite ore grinding mill is not as simple as expected.

When the motor drives the main shaft to rotate through the transmission device, the blade installed on the blade holder rotates synchronously with the grinding roller, The grinding roller rotates around its own axis while rolling in the inner circle of the grinding ring.

For example, marble, limestone, gypsum, coal, clay, pigment and other materials often seen in life can be mixed in ultrafine mill and then produced into materials required for construction sites, And more importantly, the materials processed by this equipment will not easily produce any chemical reaction or explosion at high temperature.

Why are the prices of different clay production lines different, because the materials composed of different machines will be different. Although the working principles are the same, the prices are still different when merchants buy because of different materials. The following describes the detailed working principle of ultrafine mill.

As an important building cementitious material, cement can be used to make concrete, precast concrete, fair faced concrete, color pavement brick, permeable brick, cultural stone, wear-resistant floor, etc. Vertical roller mill is a special processing equipment designed by Shibang according to the raw meal processing technology of cement industry. The unique vertical roller mill hydraulic system has good automatic control performance.

Cement raw materials commonly used in production are mainly calcareous raw materials, clayey raw materials and a small amount of correction raw materials mixed in proportion.

These raw materials can be processed into high-quality cement by dry or wet method, which can be used in civil construction, water conservancy, national defense and other projects. However, no matter which processing method, the processing of cement raw meal is unchanged.

It can automatically open and close according to the incoming materials, which can effectively prevent the grinding roller and teeth from being damaged due to the sudden interruption of incoming materials during normal production, and lay a foundation for the production automation of the pulverizing workshop.

 

In the following years, with the continuous improvement of market demand, Raymond Mill's technology continued to improve. According to the processing technology of ultra-fine powder equipment mastered over the years, many manufacturers Raymond mill have carried out comprehensive and thorough technical innovation. During this period, the price of Raymond mill also experienced some changes.

Some customers reported that when Raymond Mill processed calcite mineral powder, 325 mesh mineral powder contained a large amount of 10um ultra-fine mineral powder. If 10um ultrafine ore powder can be separated and the output can be expanded, the benefit will be greatly improved.

Practice has proved that when the calcite with the feed size of 25mm is selected for grinding, when the fineness is adjusted to 1250 mesh (10um), the output can reach 450kg / h, and the input power only needs 23KW, which has significantly higher cost performance than the traditional Raymond mill. If necessary, customers can consult our online customer service for Raymond Mill quotation.

Once the load is too large or foreign matters enter the crushing chamber, the equipment may be damaged. At this time, it is necessary to check and replace the damaged parts in time. Aggregate crusher needs no-load start before formal operation, and then starts feeding after the equipment fully works normally and reaches the rated power and revolution, so as to ensure the stability of feeding and discharging system.

There are many matters needing attention during operation. Here, it is hoped that all operators should pay great attention to some common matters and operate the equipment in strict accordance with the production requirements.

At the same time, attention should be paid to prohibit some inoperable behaviors, conduct comprehensive inspection and maintenance of aggregate crush regularly, and eliminate faults in time to ensure the normal operation of the equipment and ensure the maximum production benefits of the enterprise.

In terms of the products of ore milling plant, the products produced by ore milling plant can meet the national standards for product level and green environmental protection of production line. The effect of production line and construction can be well guaranteed. 

Therefore, many people choose ore milling plant, which can indeed double its capacity growth. So, when we need to buy ore milling plant, what should we do? In choosing an ore milling plant, we should not only look at the price of the equipment, but also look at the quality of the product and the reputation of the ore milling plant manufacturer, so as to select an ore milling plant suitable for ourselves to the greatest extent. 

The most important thing is to understand the after-sales service of ore milling plant manufacturers, so as to make the greatest guarantee for their own production line.

Calcite is a widely distributed mineral with high hardness and stable chemical properties. It is widely used in construction, mining, metallurgy, industry and many other fields.

For the processing of calcite, the first thing we think of is crushing technology. The calcite grinder milling plant machine used includes jaw crusher, hammer crusher (impact crusher), vibrating feeder, vibrating screen, belt conveyor, etc. the specific working process is as follows:

1. Its production capacity is very high, the output is as high as 800 tons per hour, high-yield production line can create more economic benefits for users.

2. The operation is more simple and convenient. Due to the high degree of automation of the production line, it reduces the application difficulty of users to a certain extent.

The bearing of silica sand grinding mill can be said to bear all the load of the equipment, so whether the lubrication degree of the bearing is enough has a great influence on the service life of the equipment.
Once the abnormal noise or vibration is encountered in the process of silica sand, it is generally caused by the unstable bottom of the equipment or excessive material addition, which needs to be handled in time.

After running for a long time, there will be a lot of dust inside or on the surface of silica sand grinding mill. If the dust accumulates too much, it will lead to the generation of static electricity, which will bring great damage to the equipment.

Therefore, the silica sand grinding mill should be maintained and cleaned regularly to remove the dust and other impurities, so as to ensure the efficient operation of the equipment next time.

Impactor Shape Difference

There are two kinds of impact blocks in the sand making machine: artificial sand And natural sand. The latter is more popular with users, because the rhombic combined impact block can avoid material impact damage to the vertical plate, improve its own wear resistance, and can also be used alternately, which not only improves the utilization rate of materials, but also effectively protects the service life of the inner guard plate of the sand making machine.

Design Difference Of Crushing Chamber

The high-quality sand making machine has the optimal launching port and internal smooth curve design, which reduces the flow resistance of materials, greatly improves the passing capacity of materials, and further improves the production efficiency of sand making.

In addition, the rotor as an important crushing part of the sand machine, its design affects the sand yield and sand stone shape, and the deep cavity rotor greatly improves the material handling capacity.

There are many manufacturers of barite grinding mill in China, so there are many types of mills, such as vertical mill, European mill, superfine mill, Raymond mill and so on. Because the fineness of materials required by different industries is also different, we should choose barite grinding mill according to the actual situation, Grinding mill is generally divided into coarse grinding, fine grinding and ultra-fine grinding. Generally, in large industrial grinding, it will choose ultra-fine large barite grinding mill. 

Compared with traditional grinding machine, it has higher production efficiency and can process raw materials to 2500 mesh. It is a popular equipment in the market, Its excellent performance has been confirmed in barite powder production lines in major regions. It can be said that it is the best equipment in barite powder industry. I believe that in the near future, with continuous innovation and development, barite grinding mill will bring greater surprise to the industry and drive the development of more industries.

Generally, the machine seldom breaks down because of the parts themselves, and most of them are caused by the unreasonable operation of the operators. Each vertical roller mill has different operation precautions. Here we take LM vertical mill as an example to introduce its operation precautions.

We all know that the price of purchasing a vertical roller mill equipment is relatively high. Generally, enterprises will try their best to maintain the equipment so as to extend its service life, improve work efficiency as much as possible, and bring high benefits to the enterprise.

However, the maintenance cost caused by improper operation is also very high, which will increase the production cost of the enterprise. Therefore, the preventive maintenance plan of enterprise equipment is essential.

The ball mill produced by zenith company is an important secondary crushing and grinding equipment. By changing the structure of ball mill of different types, the integrated underframe inside the body is realized.

Ball mill is widely used in cement, silicate products, new building materials, refractories, fertilizers, ferrous and non-ferrous metal mineral processing, glass ceramics industry, ground processing and grinding of some filling materials, etc.

The grinding medium of ball mill can be different materials, such as ceramic ball, flint and stainless steel ball. Aggregate sand and gravel can be operated continuously with ball mill, and the feed port is at one end, and the other end can discharge materials.

The large and medium-sized ball mill rotates on the axis, but the small one usually includes a sealed end cylindrical container, which is located between two driving shafts, and the driving shaft is a pulley and belt used to transmit the rotary motion.

In the actual production process, the material can not leave the vertical roller mill freely from the discharge end. The discharge end of the vertical roller mill has the effect of inhibiting the discharge of large particles. The small particles can be discharged smoothly, while the large particles remain in the mill and continue to be ground.

This effect is called export classification. The classification function of the mill itself will affect the residence time of materials in the mill, and the inhibition effect of different discharge methods is different.

For lattice ball mill, the effect of lattice has a greater inhibition on the discharge of large particles, even if the lattice opening is large, it will also prevent the discharge of some large particles.

Raymond mill is mainly used for mining crushing and processing of materials with hardness not greater than 7. The finished powder can be used for various man-made materials, natural rubber, coating plastics, cosmetics, glass, medicine, etc. 

More than 20 household chemicals and other products are used as fillers. The mills produced by Qingdao Raymond mills include Raymond mills, high-pressure suspension roller mills, high-pressure micro-powder mills, straight-through centrifugal mills, overpressure trapezoidal mills, and three There are several categories of ring medium speed grinding and three-roll grinding. 

The grinding equipment produced by the Qingdao Raymond mill manufacturer is a well-known Raymond mill brand in China. The Qingdao mill is composed of three systems: grinding, analysis, and dust removal. The raw materials can be processed by the Qingdao ultrafine mill. The granules are formed into powder at one time, the degree of fineness is stable and the probability of passing the screening exceeds 99%.

Through the structural optimization design of the vertical roller mills on both sides of the mine ore bin, the problem of uneven wear and serious wear of the vertical roller mill has been completely solved, and the service life of the optimized vertical roller mill is extended from 6 months to 24 months.

The project has achieved good results, solved the problem of the short service life of the vertical roller mill, reduced the frequency of maintenance and repair of the heavy apron feeder, reduced the labor pressure of the maintenance personnel, and improved the operating efficiency of the equipment and the stability of the production system.

SBM, 35 Years of mining equipment manufacturing, provides types of ore feeders around the world (apron feeder, vibrating feeder, chute feeder, disk feeder, etc).

We are here help to help mining machine selection, mineral processing solutions, processing plant optimization.

The post operators must obey the marked operation procedures specified in mill's start-up and shutdown procedures.

Before starting, it is necessary to carefully check whether there is ore or foreign matter in the crushing chamber; Before start-up in winter, use electric heater to heat the oil to 15 ℃ before start-up, and the oil level is between the upper and lower limits;

Start the oil pump, wait until the oil pressure is stable at 0.07-0.13mpa, and the lubricating oil in the oil return pipeline returns to the oil tank, then start ultrafine vertical mill, and start feeding after no-load operation for 10min.

The working environment of ultrafine vertical mill is bad, so it is hard to avoid some failures. These faults not only affect the normal performance of mill efficiency, but also greatly reduce the service life of mill parts and lubricants, and increase the consumption of spare parts and materials, which increases the labor intensity of maintenance and production. Therefore, the reasonable handling of these faults can ensure the stable operation of ultra vertical mill and improve the production efficiency.

Big and small bevel gears are worn and broken

reason:

1) The normal meshing condition of bevel gear is destroyed

2) Rigid connection transmission

3) Too much iron or being bitten by large pieces

Ultrafine vertical mill is to use high-speed air to accelerate the particle production speed and collide with the target to crush the material. Its advantage is that the crushed material does not produce pollution. 

Because the compressed high-speed air velocity decreases after crushing, the volume increase belongs to the heat absorption process, and has cooling effect on the material, so it is particularly suitable for ultra-fine grinding of heat sensitive materials.

However, one of the disadvantages of ultrafine vertical mill is the high energy consumption. Therefore, how to reduce energy consumption and improve production efficiency is one of the difficulties in air flow pulverization.

In order to reduce the energy consumption of air flow and improve the production efficiency of LM vertical roller mill, we must first understand the reasons.

Generally speaking, the forms of solid particles accelerated by high-speed airflow are mainly composed of the following three methods:

Airflow particle acceleration nozzle: the airflow and particles are fully mixed and then accelerated by the nozzle, which can make the particles obtain a very high speed (almost the same as the airflow speed), but the material has serious wear on the inner wall of the nozzle, so it is rarely used in practice.

Syringe accelerating particles: high speed (supersonic) airflow and particles are mixed and accelerated in the mixing tube, and the particles get higher speed, but the material has serious wear on the mixing tube.

Free air acceleration particles: particles enter the high-speed air beam as a free falling body to be accelerated. At this time, there is only high-speed air flow through the nozzle, and the wear is very small. However, due to the low falling velocity (transverse) of particles, it is difficult to get into the center of the air beam (high-speed air flow) and obtain high velocity.

The working state of ultrafine vertical mill is influenced by the factors such as speed rate, filling rate, ball material ratio, length diameter ratio, lining plate and grinding medium size, and the factors are connected with each other and are complex.
In order to give full play to the grinding efficiency of ultrafine vertical mill, the influence of mill design operating parameters must be attached importance. The improper selection of grinding parameters will cause the efficiency of the ultrafine vertical mill to be greatly reduced, and even can not work normally.

Among the working parameters of ultrafine vertical mill, the speed rate and filling rate have the most significant influence on the working state of the ultrafine vertical mill.

Grinding process is the process of material decreasing from large particles. In different grinding stages, the influence of speed rate and filling rate on product granularity is different.

When adding the coolant to the vertical mill, add the same type of coolant as the ultrafine verticla mill. Do not add tap water at will, unless it is urgent. When adding cooling water to the ultrafine verticla mill, be sure to wait until the water temperature drops to about 70 °C.

The "gradual water injection method" should be adopted to gradually cool down, but not too much water can be added too quickly, that is, while the water is being added, the engine is idling, and the tank is slowly filled with long water to ensure the safety of operators and equipment.

In addition, when the brake or other parts are overheated, it is not allowed to cool down with water, which will reduce its life and performance, causing deformation or even cracking of the parts, so it must be shut down to allow it to cool naturally.

The above is the emergency treatment method when the vertical mill is in high temperature failure, and it is hoped that it can be helpful to the user.

According to statistics, the hydraulic system fault is the first among the total number of failures in every system. What factors are the causes of hydraulic system leakage? How to solve it?

The leakage of the vertical roller mill hydraulic system is mainly caused by the pressure difference and the gap between the components when the liquid flows in the hydraulic components and pipelines. There are two types of oil discharge in the vertical roller mill hydraulic system.

One is the oil discharge sealed by the static joint surface (i.e. the fixed part, mainly including the joint between cylinder head and cylinder barrel, the connection of each pipe joint, etc.); The second is the oil release of the sealing of the dynamic joint surface (i.e. sliding part, mainly including multi-channel valve stem, cylinder piston and inner wall of cylinder barrel, piston rod and guide sleeve of cylinder head, etc.).

The vertical roller mill models produced by each manufacturer have certain differences. The sand production and energy consumption of different models of equipment are different during operation. When purchasing equipment, users should have a certain understanding of their own production and purchase the appropriate model of vertical roller mill. Otherwise, it will not only affect the output of equipment, but also make users spend higher costs.

The standard operation and regular maintenance of vertical roller mill will also affect the sand production of the equipment. If the operation of a vertical roller mill is not standardized and regular maintenance is not carried out, the wearing of vulnerable parts of the equipment will be accelerated, the service life of the equipment will be greatly reduced, and the production volume per unit time will be small.

Firstly, the problem of insufficient system pressure is caused by the failure of the pressure regulating valve or the abrasion of the valve core of the pressure regulating valve. At this time, the oil filter needs to be removed to observe whether there are metal debris

If there are bright steel particles, it indicates that the working pump of vertical roller mill has wear problems.

If aluminum particles are found, it indicates the wear of vertical mill.

If there are black or copper particles, it means that the clutch wear failure.

In addition, the magnetic filter screen under the oil pan needs to be removed for inspection to see if there is any steel debris. Through the inspection of the above parts, it can be determined whether the oil temperature rise is caused by the component damage.

Slim oil pipe, many elbows and no fixing are easy to cause pipe shaking when oil flow rate is high.Unbalanced rotating parts of electric motor and hydraulic pump, poor alignment during installation or loose coupling can generate vibration and noise.

Solution: It is suggested to separate the long oil pipe from the wall of the machine tool and install support pipe clamp properly.Adjust installation accuracy of motor and hydraulic pump;Reinstall the coupling to ensure that the coaxiality is less than 0.1MM etc.

In addition to routine maintenance, when the ultrafine vertical mill encounters abnormal phenomena in operation, check the fault parts and causes one by one and take corresponding measures in time, so as to avoid greater losses.

There are many ways to install the centering idler group, such as four-bar linkage type, vertical roller mill and intermediate shaft type. The principle is that the belt can be automatically centripetally adjusted by blocking or idler rotating in the horizontal plane to block or generate transverse thrust, and the stress condition is the same as that of the bearing idler group.

The adjustment method of tail roller is just opposite to that of head roller. The specific method is which side of the belt, which side of the idler group moves forward towards the belt, or the other side moves backward.

In general, this method is more suitable for the vertical roller mill with bidirectional operation state or the total length of the vertical roller mill is short. This is mainly because the shorter vertical roller mill is more prone to run off and is not easy to adjust compared with the longer belt conveyor, If the long vertical roller mill adopts this rule, it will affect the service life of the belt.

Large scale and diversified equipment has become the mainstream equipment in the current market. Compared with fixed milling equipment, vertical roller mill is more automatic and intelligent, and has more advantages in handling materials. 

The advantage of mobile station is that it is convenient for it to move flexibly, and it can directly enter the site for milling work, leaving a large amount of cost to the owner, This is also the reason why many consumers choose vertical roller mill. 

At present, the most used construction waste is broken, and the construction waste is not concentrated. The use of mobile station can solve this problem, realize the use of construction waste recycling equipment, make construction waste into sand and brick, and truly turn waste into treasure.

In the past, the main bearing is sealed with fine wool felt ring in the traditional vertical roller mill structure, which is easy to wear. Moreover, the dust particles will enter into the main bearing after the cracks between the wool felt ring and hollow shaft after the wear.

This method is also the key reason for abrasive wear and oil blockage of spherical bearing shells. Therefore, during the maintenance, the wear of sealing ring should be checked timely. If the degree is serious, it should be replaced and updated, which will block the dust.

Many manufacturers have also improved and optimized on this basis. In order to avoid oil leakage, the main bearing adopts more advanced piston seal.

Analysis of the causes of typical faults in the maintenance of vertical roller mill and the key measures to deal with them.

Vertical roller mill is an indispensable abrasive equipment in many mining companies, and it is an important basis to ensure the normal operation of industrial production. Daily maintenance is very important.

1. there is oil groove in the contact angle scraper, but it is necessary to note that it cannot be scraped through.

2. daily maintenance is very important.

3. in normal working process, the cracked cylinder under working condition shall be renewed and replaced at the first time once the bolt is loose or the lining plate is falling off.

There are three control modes of wound motor + reducer. The first control mode is wound motor series frequency sensitive resistance or water resistance; The second control mode is winding motor with metal resistance; The third control mode is winding motor cascade speed regulation.

The first control mode has no speed regulation function, and the motor can not be started frequently. It is generally used on the ultrafine vertical mill with the length of more than 500m and the motor can not be started frequently.

The second control mode has no speed regulation function, but the motor can be started frequently. With SCR power brake, it is a common driving mode for the downward transport of ultrafine vertical mill.

The third control mode has the function of speed regulation, which can be used as closed-loop control. It is generally used in large-scale ultrafine vertical mill with the length of more than 1000m and the function of speed regulation is required.

The abnormal sound of ultrafine vertical mill will produce great noise. In daily production, noise is inevitable, but too much noise will have adverse effects on the staff. Therefore, the following measures can be taken to reduce the noise:

Select Bearing With High Box Size

The vibration of the bearing during operation includes two aspects:

One is structure: the rolling body causes the small change of the axis position through the composite action, which causes the vibration;

The second is manufacturing: the geometrical errors of rolling body, inner and outer ring, cage and so on will cause vibration.

The load, speed, lubrication and working clearance will affect the vibration of the bearing to varying degrees. Therefore, when selecting the bearing, the bearing life conditions must be satisfied first, and the bearing with smaller size and higher box size shall be adopted as much as possible.

Lining plate is an important part of conical fracture, and it is also the main wear-resistant part of conical fracture. How to reduce the wear of liner is a problem that many users are very concerned about

Reduce the looseness of lining plate. The looseness of the liner will cause the relative movement between the liner and the conical body, which will aggravate the wear. Therefore, a soft metal gasket can be padded between the lining plate and vertical roller mill, and the bolt can be used for fastening, so as to ensure the leveling between the two, and reduce the breakage or wear phenomenon caused by the loosening of the lining plate.

Improve the stress state of lining plate. In order to make each point of the lining plate bear uniform force, plastic precipitation is often placed between the lining plate and vertical roller mill, such as lead plate, aluminum plate, zinc alloy plate, low carbon steel plate or cement mortar, to ensure the close combination of the lining plate and vertical roller mill.

Cement standard consistency water demand (hereinafter referred to as cement water demand), the exact characteristic parameters should be the standard consistency of concrete water consumption, is to make the cement vertical roller mill to achieve a certain degree of plasticity and mobility required mixing water, it is important indicators of cement performance.

Cement water demand directly affects the water-cement ratio of concrete, which affects the strength of concrete, corrosion resistance, frost resistance, durability, the amount of concrete produced by concrete and the amount of admixture, affecting the cost and benefit of the user.

Large amount of Cement standard consistency water demand, the more cement paste to achieve the standard consistency of water consumption, the more cement mortar to achieve the required flow of water, and cement concrete to achieve a certain amount of slump water consumption are also larger, so the greater the water-cement ratio of mortar and concrete, the more space between the particles, the smaller the density, the cement and its concrete construction performance, mechanical properties and durability deterioration will get worse.

At present, there are broken line shaped and circular arc shaped ultrafine vertical mill in the market. The angle of each stage of impact plate has a great influence on the effective crushing force of the material impacting the impact plate, and also has a great influence on the impact and shear crushing effect of the material.

The broken line impact plate has a simple structure, but it can not guarantee the most effective impact crushing of ore. therefore, when purchasing and debugging the impact plate, we must pay attention to the angle of the impact plate, so that when the material collides with the impact plate, it can be perpendicular to the impact plate, so as to improve the production capacity of the impact plate.

The arc-shaped impact plate is commonly used in involute linear structure. The characteristics of this structure are that at each point of the impact plate, the ore is impacted in the vertical direction, resulting in higher crushing efficiency and higher production capacity.

The level of the overflow weir of the classifier affects the size of the sedimentation zone of the ore. In production, the level of the overflow weir of the classifier can be adjusted appropriately according to the requirements of the fineness of the grinding.

If the grinding fineness is required to be finer, angle irons of a certain height can be welded on both sides of the classifier, and the level of the overflow weir of the classifier can be adjusted by the method of inserting wooden boards. Sometimes long-term accumulation of mineral mud can naturally increase the height of the overflow weir.

In production, the vertical roller mill must supervise the crushing system. If the particle size of the vertical roller mill to the ore changes during reproduction, it must be immediately fed back to the crushing workshop. The final requirement is that the finer the crushing particle size, the better, and "more breaks and less grinding" saves production costs.

1. The Current Of The Main Engine Increases, The Temperature Of The Main Engine Increases, And The Current Of The Fan Decreases

Causes: 1) feeding speed is too fast; 2) The air duct is blocked by powder, and the pipe exhaust is not smooth.

Solutions: 1) reduce the amount of feed, 2) remove the dust accumulation at the air duct or open the residual air pipe valve, and control the temperature at the feed inlet below 6 ℃.

2. The Main Engine Of Vertical Roller Mill Starts Slowly

Causes: 1) insufficient power distribution; 2) The voltage is unstable.

Solutions: 1) check whether the motor is in line with the power of vertical roller mill, and replace the suitable motor power; 2) Check the power line and set the voltage stabilizing device.

The replacement workload of the ultrafine vertical mill bearings is very large. When the spare parts are fully prepared, it takes about 7 days to replace the ultrafine vertical mill or a set of ultrafine vertical mill bearings at the fastest, and the replacement cost is high and the economic loss caused is relatively large.

Therefore, in order to ensure the normal operation of the roller bearings, the following points need to be done in daily maintenance:

Ensure the normal operation of the sealed fan. The wind pressure should not be lower than the specified value. Under normal circumstances, it should be kept above 20Bar. Regularly check whether the sealed air duct is damaged; the joint bearing at the joint between the sealed air duct and the ultrafine vertical mill in the grinding cavity Whether the flange is disengaged, etc.

At the same time, in order to ensure that the positive pressure air entering the ultrafine vertical mill is clean, a filter screen and filter cloth must be installed at the entrance of the fan to prevent micro-particle materials from entering the sealing air cavity of the ultrafine vertical mill, damaging the sealing ring and oil seal of the ultrafine vertical mill, and causing the ultrafine vertical mill Oil spill.

 

The replacement workload of the ultrafine vertical mill bearings is very large. When the spare parts are fully prepared, it takes about 7 days to replace the ultrafine vertical mill or a set of ultrafine vertical mill bearings at the fastest, and the replacement cost is high and the economic loss caused is relatively large.

Therefore, in order to ensure the normal operation of the roller bearings, the following points need to be done in daily maintenance:

Ensure the normal operation of the sealed fan. The wind pressure should not be lower than the specified value. Under normal circumstances, it should be kept above 20Bar. Regularly check whether the sealed air duct is damaged; the joint bearing at the joint between the sealed air duct and the ultrafine vertical mill in the grinding cavity Whether the flange is disengaged, etc.

At the same time, in order to ensure that the positive pressure air entering the ultrafine vertical mill is clean, a filter screen and filter cloth must be installed at the entrance of the fan to prevent micro-particle materials from entering the sealing air cavity of the ultrafine vertical mill, damaging the sealing ring and oil seal of the ultrafine vertical mill, and causing the ultrafine vertical mill Oil spill.

Deformation of the grinding roller

Long-term wear causes the shape of the grinding roller to change, the grinding roller is not round, and it collides with the grinding ring during the rolling process and vibrates violently. The grinding roller should be replaced in time.

The analysis machine blade is unbalanced

Check whether the blades of the analysis machine are intact. In order to save trouble and cost, some manufacturers install the blades without debugging, resulting in unqualified production in later stages and causing vibration.

The Internal Parts Of The Equipment Are Loose

The biggest components inside the ultrafine vertical mill are the plum blossom frame and the grinding roller. These two components are connected by bolts. When the equipment is running, a strong airflow will be generated inside. If these two parts are loosened, the airflow will become very unstable, and will gradually vibrate and cause noise.

During the running process of vertical roller mill, the hydraulic system pressure can not be maintained. Observe the frequent start of high-pressure oil pump and increase of hydraulic oil temperature. This phenomenon is very easy to cause oil pump damage and energy consumption.

There are two main reasons for frequent start-up of high pressure pump

One is the damage of the rod seal of the hydraulic cylinder, and the leakage in the cylinder is caused;

Second, leakage or damage in return valve (or pressure relief valve) causes frequent action of high-pressure oil pump.

Measures can be taken to inspect and deal with in production from the following aspects:

One is to check whether there is internal leakage in hydraulic cylinder. The most direct method is to shut down the oil pump of the tension hydraulic station after grinding is stopped. Observe whether the oil pressure of the hydraulic station gradually drops under the static state. If the drop indicates that the hydraulic cylinder has internal leakage, the seal should be replaced in time.

Controlling the running state of vertical roller mill is also an important measure to deal with liner wear. When the vertical roller mill is running under low load, it is necessary to adjust the feed quantity of vertical roller mill in time so as to improve the grindability coefficient of the ore.

During the installation of the lining plate, it is necessary to excavate and repair the non-conforming parts so that the lining plate can be fully integrated into the working system of the vertical roller mill. After the installation of the lining plate, the relevant staff should carry out repeated debugging and make detailed records to ensure that the fixing bolts in the vertical roller mill have a certain pre-tension force so as to prevent the bolts from loosening during the operation of the vertical roller mill.

In addition, the liners need to be replaced in a timely manner.Generally speaking, as long as the operation is correct, it is necessary to replace the liner once every 12 months, do a good job of checking, and actively adjust the position of the liner according to the actual situation, which can reduce the loss of the liner to a certain extent.

Material and heat treatment process of liner directly determine the mechanical properties of liner and will have an important impact on the wear of liner.If the lining material is not properly selected and the heat treatment process is unreasonable, the fatigue strength and service life of the lining will be greatly reduced, which will not meet the requirements of grinding operation of vertical roller mill, and even cause some problems such as plastic deformation and drum.

Heat treatment of lining plate is an important way to reduce wear of lining plate of vertical roller mill. Therefore, proper heat treatment process should be selected according to the material of lining plate.However, in actual work, the relevant staff lacks the knowledge of lining material, so in heat treatment, the processing of lining is not enough, which not only does not play a strengthening role, but also makes the strength of lining lower. When hit by steel balls and materials, plastic deformation will occur.

The grinding speed of the grinding machine is very slow, the grinding capacity is small and the production efficiency is low. Therefore, in the daily use of equipment, it is necessary to strictly follow the instructions of vertical roller mill, grinding the materials with appropriate hardness.

The requirements of each type of ultrafine vertical mill for the moisture content of materials are different, but the production efficiency of any type of equipment will be greatly affected by the water content.

The fine powder contained in the material also affects the production efficiency of vertical roller mill. Because these fine powder is easy to adhere, affecting the transport. When the fine powder is more in the material, it is easy to adhere to the equipment during grinding, which affects the transportation. For such materials with more fine powder, the sieve shall be conducted one time in advance.

The requirements of each type of ultrafine vertical mill for the moisture content of materials are different, but the production efficiency of any type of equipment will be greatly affected by the water content.

When the moisture content of the material is high, the material is easy to adhere to the grinder, and it is also easy to block in the process of feeding, which results in the reduction of the grinding capacity and the reduction of production efficiency.

At the same time, it will block the circulation air duct, discharge port of analyzer, etc., so the water content of materials should be controlled. Generally, the moisture content of the material can be controlled by drying operation before production.

The fine powder contained in the material also affects the production efficiency of the grinder. Because these fine powder is easy to adhere, affecting the transport. When the fine powder is more in the material, it is easy to adhere to the equipment during grinding, which affects the transportation. For such materials with more fine powder, the sieve shall be conducted one time in advance.

Vertical roller mill are widely used in thermal power plants with the advantages of low investment, simple operation, low power consumption, and compact structure.
Trouble phenomenon:

The coal quality changes greatly, and the raw coal has a large moisture;

Improper adjustment of air and coal volume, out-of-balance of air-to-coal ratio, and too small primary air volume;

The inlet air temperature of the vertical roller mill is too low;

The entrance of the stone coal hopper is blocked or the slag is not discharged in time;

The coal feeder control device is malfunctioning.

Solution:

1. Reduce the amount of coal fed, increase the primary air flow, and increase the outlet temperature of the mill; take precautions during processing to prevent a large amount of coal powder accumulated in the mill from suddenly blowing into the furnace, causing a sudden increase in boiler load and steam pressure;

2. Increase the number of discharges of pebble coal;

The barrel is an important part of the vertical roller mill, and the price is relatively expensive. After the liner is installed in the barrel, the barrel will not directly bear the impact and grinding of the grinding medium and the material to be ground, thereby protecting the barrel and extending the barrel and the entire The service life of the equipment. The lining board and the cylinder body are tightly combined, and also play a role in enhancing the rigidity of the cylinder body.

Automatic grading linings such as angle spiral linings, cone grading linings, etc., can make the grinding bodies of different gradations in the cylinder, along the axial direction of the mill, according to the change of the grinding particle size, reasonably positively classify, so that various Grinding bodies of different diameters exert their greatest function in the process of crushing materials of corresponding particle sizes.

In other words, the automatic grading liner can gather the larger steel balls in the same grinding bin at the feed end of the bin to smash larger pieces of material, and at the same time make the smaller steel balls gather at the discharge end of the bin.

With the advancement of technology, new material liners have also begun to be used in vertical roller mill. For example, a composite liner composed of rubber and cemented carbide steel can ideally solve the contradiction between the toughness and rigidity of the liner and reduce the liner. The impact force received during operation. 

Compared with ordinary liners, the heat resistance and strength of composite liners have been greatly improved. Especially in terms of service life, composite liners are twice as effective as traditional liners, which greatly improves the economic benefits of enterprises. In addition, the composite liner has low working noise, light weight, and is easy to promote, but it lacks practice. However, there is a lot of room for development in dealing with the problems of liner aging and liner wear.

Regularly check the operation of the vertical roller mill lubrication system, such as whether the oil temperature is normal, the oil temperature should be 52-53℃ in normal production, whether the balance pipe connected between the vertical roller mill and the oil tank is blocked, whether the vacuum switch is normal, whether the oil pipe joints and soft Whether the pipe is damaged or leaking, whether the oil return pipe works normally, etc.

At the same time, closely observe the changes in the oil level of the oil tank. When the oil level of the oil tank is found to fluctuate abnormally, it is necessary to carefully analyze the cause, find the crux of the problem, and deal with it in time to prevent bearing damage due to lack of oil or excessive refueling. Burst.

Regularly add grease to the sealing rings on both sides of the vertical roller mill. The general addition cycle is one month. It is added when the vertical roller mill is hot and lifted by hydraulic pressure, and the vertical roller mill is manually rotated while adding. Do not add too much to prevent the grease from being squeezed and sealed.

Regularly inspect the oil quality and detect the content of metal particles in the oil sample to determine the bearing damage. At the same time, keep the lubricating oil clean, and judge whether to replace the lubricating oil according to the oil quality and the replacement interval of the oil filter.

The sealing of the grinding roller is to prevent high-concentration dust in the vertical roller mill from entering the grinding roller cavity and to protect the roller bearings from damage. High pressure air is blown into the grinding roller cavity through the sealing machine to form a positive pressure in the grinding roller cavity to prevent The purpose of dust entry.

However, the working conditions in the vertical roller mill are very complicated, and the dust concentration in the suspended state is very high. The following situations often occur during the production process:

The air pressure of the sealing fan is low or the filter screen and filter cloth of the sealing fan are blocked by dust, which causes the sealing air volume and air pressure to enter the grinding cavity to decrease;

The flange of the wind pressure sealing pipeline and the joint bearing on the sealing pipeline in the vertical roller mill have poor sealing and air leakage, which reduces the wind pressure entering the grinding roll cavity;

When the vertical roller mill is running or stopped, the unreasonable drawing of the wind in the vertical roller mill will produce a slight negative pressure in the grinding roll cavity.

The above reasons may cause the air volume and air pressure to enter the grinding roller cavity to decrease, and it is easy for micro-particle materials to enter the sealing air cavity of the grinding roller, damaging the sealing ring and oil seal of the grinding roller, and causing oil leakage or bearing damage to the grinding roller.

When the temperature of the roller rises abnormally, immediately stop production and conduct an investigation. From the sealed fan, step by step inspection is carried out in the direction of the wind, so as to plug the loopholes, seal and unblock them in time.

Due to the harsh working environment of ultrafine vertical mill, which is accompanied by a large amount of powder for a long time, the filter screen of the fan is easy to be blocked, so the technicians should clean it frequently and try to do it once every half a month.

And because the temperature of the working environment is high, the air duct is prone to softening and deformation or air leakage. It should also be checked every half a month to kill the fault in the cradle.

The reason for the lack of ultrafine vertical mill lubricating oil is generally because the choice of the type of ultrafine vertical mill lubricating oil is wrong. Generally speaking, the working temperature of the roller bearing is relatively high, and the temperature inside the bearing is close to 200°C.

If the type of ultrafine vertical mill lubricating oil is wrong, the oil used for lubrication will deteriorate or evaporate due to high temperature and high pressure, thus losing the function of protecting and lubricating the roller bearing, which will increase the heat generated by the friction of the roller bearing. , Resulting in an abnormal increase in bearing temperature.

In addition, if the ultrafine vertical mill lubricating oil is too little, or if it is not replaced in time, it may cause the ultrafine vertical mill lubricating oil to lose its original function, resulting in insufficient lubrication of the roller bearing, and will also increase the bearing temperature and cause premature damage to the bearing.

The first is high quality, which mainly refers to the complete performance of ultrafine vertical mill, complete functions, and long service life of accessories, which can ensure that ultrafine vertical mill brings better production benefits to the production line;
The second is daily maintenance, which mainly refers to the maintenance of ultrafine vertical mill during the working process to reduce the damage in the production of ultrafine vertical mill, help to extend the service life of ultrafine vertical mill, and make ultrafine vertical mill better serve the production line, and ultrafine vertical mill encounters severe vibration during production. Other problems also have a great impact on production, so daily maintenance mainly includes the following aspects:
For the problem of excessively large particle size in the production of ultrafine grinding equipment, it may be caused by spring wear or excessive gap between the spring and the high-pressure plate. Therefore, the spring needs to be replaced or adjusted, and the spring and the high-pressure plate The gap is generally kept between 15-20 mm;

The vertical roller mill separator and the louver ring are one of the important internal parts. When they are working, they will also encounter some problems. The solution of these problems is an important condition to ensure the smooth operation of the machine, and then for these parts The maintenance of these two parts is also very important, so that failures can be prevented in time. In this article, we are going to analyze the maintenance of these two parts.

Remove the five moving blades in each layer of the squirrel cage of the fine grinder to leave enough space to observe the connection and wear of the stationary blades. Rotate the squirrel cage to check whether the connection of the stationary blades is welded or worn. The grinding parts need to be welded firmly with J506/Ф3.2 welding rod. Adjust the angle of the stationary blades, the vertical distance is 110 mm, and the horizontal angle is 17° to ensure the quality of powder selection.

The vertical roller mill separator and the louver ring are one of the important internal parts. When they are working, they will also encounter some problems. The solution of these problems is an important condition to ensure the smooth operation of the machine, and then for these parts The maintenance of these two parts is also very important, so that failures can be prevented in time. In this article, we are going to analyze the maintenance of these two parts.
In the interior of the vertical roller mill, the material after the sorter is ground and dried enters the part along with the air flow from the lower part for sorting operation. The purpose of sorting is to obtain a better quality of the finished product. There are moving and static blades, and the welding must be firm, otherwise it will cause accidents such as shutdown.
The maintenance of this part is divided into the inspection and repair of the moving blades and the static blades. When the moving blades are overhauled, they need to be vibrated with a hand hammer one by one. See if there is any movement of the blade. If so, it needs to be fastened, marked, and welded and strengthened.
If severely worn and deformed blades are found, they need to be removed, and new moving blades of the same size shall be installed according to the requirements of the drawings, and they shall be weighed before installation to prevent loss of balance. When the stationary blades are overhauled, they need to be overhauled.

LUM series ultrafine vertical mill is a professional new type of ultrafine vertical mill that Shanghai SBM relies on nearly 30 years of Mill Research And Development and manufacturing experience, based on LM vertical mills, and combines Taiwan's advanced roller technology and German new powder selection technology.

The feed size is less than 10mm, the production capacity is 5-18/H, and the finished product has a fineness of 400-2500 mesh and the sieving rate reaches 97%. The birth of the LUM series of ultrafine vertical mill has broken through the development bottleneck of the general low production capacity of ultrafine vertical mill, and has guided a new direction for the development of the ultrafine vertical mill industry.

Answer: LUM series ultrafine vertical mill can realize large-scale ultra-fine dry powder processing of calcite, marble, limestone, heavy calcium, talc, barite, kaolin, dolomite and heavy calcium and other non-metallic minerals. Limestone is used for desulfurization in power plants and steel plants. It is also widely used in large-scale projects such as the grinding of powder, the deep processing of slag powder and the preparation of blast furnace injection coal powder.

Moreover, the environmental protection technology of the new industrial cement mill also provides an opportunity for the development of the cement industry. Industrial cement mill that is in line with sustainable development must have a better future for development.
Then there is market advantage. We know that the direct downstream enterprises of the cement industry are the building materials industry, and the development of my country's building materials industry in recent years is obvious to all. As the pillar industry of the building materials industry, the cement industry has a market development prospect that can be imagined.
Moreover, with the increasing market competition among upstream cement companies & mdh; cement crushing and grinding equipment manufacturers, the cement equipment industry will surely promote technological innovation and speed up the speed of product upgrading, which in turn promotes the efficient and effective cement production. High-yield, high-tech content.

The correct operation of ultrafine vertical mill has a great impact on the production process of ultrafine vertical mill, so some problems in the use of ultrafine vertical mill must be paid attention to in order to make ultrafine vertical mill work better. This article will discuss the production of ultrafine vertical mills. What issues should be paid attention to.

Ultrafine mill has an impact on its working process, but the operations in the production engineering will also affect the work of ultrafine vertical mill. Therefore, ultrafine vertical mill has operating instructions when it leaves the factory. Operating ultrafine vertical mill according to these instructions can make ultrafine vertical mill better Work, here is what should be paid attention to in the production of ultra-fine vertical mill equipment.

Although ultrafine vertical mill has operating instructions, it is difficult for staff to perform these operating items well if they do not understand the operating items. Therefore, it is more important to train professional staff to have a certain understanding of the Structure And Principles Of The Equipment.

The limestone ultrafine vertical mill desulfurization and pulverizing process designed by SBM can achieve 95% desulfurization rate, which not only benefits from the reasonable process and equipment configuration, but also benefits from the high efficiency of its grinding equipment; ultrafine vertical mill machine.

The machine has a high degree of automation, thin oil lubrication, automatic control device and limit device to ensure the stable operation of the equipment. The chemical composition of the finished coal powder prepared by the mill is stable, the fineness grade is high, and the particle size distribution is reasonable. Moreover, the machine has the advantages of low cost, strong drying capacity, fully sealed production system, no dust and clean environment.

Shanghai SBM provides customers with one-stop service, from equipment selection, process design, to installation and commissioning, follow-up follow-up maintenance, so that customers can save effort.

The grinding roller of the ultra-fine grinding machine in normal operation will not be in direct contact with the grinding ring. , The degree of wear of the grinding ring has also increased correspondingly, which will cause insufficient grinding of the material, affect the fineness of the finished product, and increase the coarse particles;

The second point is the influence of the speed of the fan of the ultrafine vertical mill on the particle shape. The speed of the fan has a direct influence on the wind. The magnitude of the wind will have an important influence on the material, because the collection of finished products in the production mainly depends on the wind;

The third point is that the speed of the main engine also affects the grain shape of the ultrafine vertical mill. The machine speed directly determines the size of the finished product, so if the speed is too high or too low, it will affect the finished product.

The influencing factors of the ultrafine vertical mill particle type introduced above mainly include the degree of wear of the grinding roller and the grinding ring, the speed of the fan of the fine mill, the speed of the main engine and the blades of the analyzer. These four factors affect the fine powder The main factors of grain size, controlling these factors during production can produce finished products that are more in line with customer needs.

Ultrafine vertical mill manufacturers must make efforts in two aspects of equipment quality and service if they want to carry forward.
The ultrafine vertical mill is widely used in the production line of bauxite, slag, water slag, clay, bentonite and other materials. It has a series of advantages such as low cost and high efficiency.
It is welcomed by many industries such as mining and metallurgy, but In this case, many manufacturers have not developed well. This phenomenon is mainly due to the quality of equipment and the vicious competition in the market. So how can ultra-fine grinding manufacturers develop better and carry forward their own brands?
First of all, let's talk about the quality problem of the ultrafine vertical mill. This is the fundamental reason why customers choose this equipment. If the quality is not good, it will be difficult to bring good production efficiency to the production process, and the quality will not be closed during production.

The components of the vertical roller mill will have some faults during the production process. Only when these faults are solved well can the equipment work better. Now let's introduce what are the faults of the equipment construction and how to solve them.

The components of the vertical roller mill are always inevitable in the production of such or other failures. Only a good solution to these failures can ensure the good working condition of the equipment, so the topic of this article is to introduce the vertical roller mill How to solve the problem of component failure in production.
Shanghai Zenith has been engaged in the production of mining machinery for more than 20 years. We have not only studied the technology of the equipment, but also invested a lot of research efforts on the failure of the equipment during the work process, and the problem of the failure of the components of the vertical roller mill equipment.

After research in our factory, it is found that this statement is unreasonable, because hot air has an impact on the properties of materials and other aspects, and with the change of wind temperature, the effect on the production capacity of vertical roller mill is not obvious. , So hot air does not help increase production capacity, so if we want to increase production capacity, what aspects should we operate from?

The point is that the size of the air volume is directly proportional to the production capacity, that is, the larger the air volume, the greater the production capacity will be during the production process. Therefore, if you want to increase the production capacity, you need to perform vertical roller mill while meeting the demand for finished products. Set the air volume reasonably;

The second point is to ensure reasonable operation. This point mainly refers to the standardization of operation. As long as it is carried out in accordance with the operating regulations when leaving the factory, in this process, in order to better ensure the production process, we also need to Reasonable maintenance of the ultra-fine mill, such as lubrication, overhaul, etc., has a definite period.

In the production process of vertical roller mill, the improvement of efficiency is a constant topic. In the actual production process, efficiency is related to many aspects. The most important one is the choice of mill model. The ultra-fine pulverizer can better improve production efficiency. If the selected machine itself is not suitable, it is difficult to bring better production efficiency to the production process.

In the production process of vertical roller mill, the improvement of efficiency is a constant topic. In the actual production process, efficiency is related to many aspects. The more important one is the choice of mill model. A suitable vertical roller mill can better improve the production efficiency. If the selected machine itself is not suitable, it is difficult to bring better production efficiency to the production process.

The old saying goes well: "Workers must first sharpen their tools if they want to do well", which means "to do a good job, you must first sharpen the tools, and do one thing well, preparation is very important", especially In the mining industry, it is particularly important to choose a suitable production equipment. The type of vertical roller mill equipment we call is mainly used to produce fine powder. If the type is unreasonable, it cannot be completed with specific properties. The grinding of materials cannot be processed normally, so the selected model is very important.

The reason why large carbon black vertical roller mill manufacturers can occupy a place in the market and can withstand changes in market demand depends not only on the quality of the machine, but also on the excellent strength of the manufacturer. This article will analyze What are the problems with the advantages of large carbon black mill manufacturers?
The reason why large carbon black vertical roller mill manufacturers can occupy a place in the market and can withstand changes in market demand depends not only on the quality of the machine, but also on the excellent strength of the manufacturer. This article will analyze What are the problems with the advantages of large carbon black mill manufacturers.
The number of points and meshes is fine, up to 1250 meshes
When the carbon black vertical roller mill is working, the carbon black material is sent between the grinding roller and the grinding ring. The material is crushed into powder under the action of the rolling pressure, and then the powdered material is blown up under the action of the fan and analyzed.

The ultrafine vertical mill has the properties of large crushing ratio and good quality of finished products, which is of great benefit to the improvement of production efficiency of the production line.
The ultrafine vertical mill has the advantage of low loss in addition to better production capacity, because the equipment uses a special production process in view of the disadvantages of traditional grinding equipment in the production of large losses, which makes the structure of the equipment a lot stronger. It can reduce the maintenance cost of the equipment in the production process and save the investment of the project.

barite-mtw110-2
The ultrafine vertical mill uses a high-efficiency turbine classifier, which is currently a relatively advanced classifier system in the world, which can effectively enhance the accuracy of the equipment classification, and the hammer head and other important parts of the equipment are all special.

The second is the quality problem, which is mainly related to the service life of the vertical roller mill equipment in production. If the quality is good, the failures in the production will be reduced, and it can also help the performance to be better;
After sales again, after the manufacturer sells the mill, the customer may not understand the information of the superfine grinding machine. If the manufacturer can provide some knowledge training on the structure, principle, use, etc., then the operation in the production will be more convenient. And when a customer encounters a problem that cannot be solved, if the manufacturer provides some help, the problem can be solved well;
Summary: The article mainly introduces the problems that customers will care about during the development of vertical roller mill equipment, mainly in three aspects: quality, performance and after-sales. The article analyzes these three aspects in detail.

The second point is that the equipment must be regularly overhauled, mainly to check the wear of the wear parts of the equipment, whether it needs to be replaced, and then regularly add lubricating oil to the equipment;

In addition to the above two accidents, you need to pay attention to stopping the feeding operation when shutting down. After the LUM ultrafine vertical mill equipment is shut down, the unfinished materials should be removed from the equipment. You are almost done doing these tasks, and then you have to follow the manufacturer's suggestions.

Thank you for your guidance. With these valuable opinions, the service life of the LUM ultrafine vertical mill equipment will be longer, better work, and greater contributions to the grinding production line.

Vertical roller mill usually in coarse size, with high grade and low water content, it is a good source of gold production, but a shortage in small scale.Karst vertical roller mill often produced in karst tunnels and caves.

The width of vertical roller mills is generally 50-300m or wider, and the length can reach several kilometers or even tens of kilometers; generally it is made up of soft sandstone; the buried depth of the ore is generally 1-5m, some would 20-30m even deeper; the thickness of the gold-bearing ore layer is usually 1-5m; the bottom of gold layer is mostly granite, shale, limestone.

In addition to gold, vertical roller mills also contain a variety of heavy minerals, which associated with gold, magnetite, ilmenite, rutile, garnet, zircon, hematite, chromite, olivine, epidote, pyrite, monazite, limonite, platinum, antimony, cinnabar, wolframite, scheelite, cassiterite, corundum, diamond, mercury paste, galena, etc.

In order to meet the needs of the power industry desulfurization and dust removal, the company newly developed the equipment for production of desulfurization limestone powder. Vertical roller mill has become the preferred equipment for desulfurization limestone powder processing plant because of large output and high efficiency.

With many years of rich experience and high design level accumulated in the building materials industry, new areas are opened up in the vertical roller mill desulfurization limestone crushing projects. And the cooperation with Datang, to the Union, Shendong and other companies fully proves that we already had a strong strength and are the first company to enter the field of China's power industry environmental protection.

LM vertical roller mill uses the technology of flue gas desulfurization dry limestone, and carries out the policy of saving investment, reliable production, easy operation, advanced technology, meeting the environmental protection and improving efficiency and makes contribution to the desulphurization and superfine limestone crushing projects of vertical roller mill.

LUM ultrafine vertical mill: https://www.gravelmill.com/product/grinding/lum-ultrafine-vertical-roller-mill.html

Limestone, a mineral resource with high calcium carbonate content, is an important participant in building materials and industrial raw materials, and has become a powerful auxiliary in China's modern industrial construction. As a senior mining machinery equipment manufacturer processing limestone, SBM recommends: LUM ultrafine vertical mill for limestone. Why do you say this, please see the breakdown.

In order to ensure the high efficiency and energy saving of the limestone powder production process, it is necessary to strictly control the moisture content of the product. For the analysis of some characteristics of limestone, combined with its production advantages to control the moisture content, in order to improve the overall production efficiency and ensure efficient yield.

Ultra-fine vertical mills are advanced in many aspects compared to the traditional technology of limestone processing. This production technology combines the characteristics of limestone into powder, according to the crushed mill.

vertical roller mill operation: https://www.gravelmill.com/solutions/vertical-roller-mill-operation.html

In recent years, Chinese infrastructure including high-speed rails, road and building is developing fast. Machine-made sand is used widely. The ultrafine vertical mill production lines, composed of crushers, sand-making machines and conveyors, are seen everywhere. 

Considering environment and technologies, two sand-making methods-by dry-process and wet-process, are gradually mixed with each other. Chinese machine-made sand production is entering leaping development stage. As the domestic famous enterprise configuring aggregate production line, GK becomes the focus of this field.

Ultrafine vertical mill production lines are widely used in aggregate plants, mines, metallurgy, building materials, roads, railways, water conservancy, chemical engineering. The capacity varies from 50 t/h to 1000 t/h with granularity arranged and classified in terms of different demands. 

The beneficiation of ultrafine vertical mill ore is based on the difference in physical properties of minerals, such as the difference in particle size, shape and specific gravity, the gravity separation is the main method of placer alluvial gold beneficiation processing.Commonly used gravity separation equipment includes chute (sluice), various types of mineral jigs, gold shakers, centrifugal concentrators, etc. 

According to the working principles, the gravity separation process can be divided into ore washing, particle grading, gold sluice, gold jig, gold shaker and heavy medium separation. Among them, except for washing and grading, which are mainly separated by particle size, the other is the process of separating the minerals by specific gravity (density).

These primary gold-bearing geological bodies can be either primary gold ore bodies, gold-bearing altered rock belts, fractured fracture zones, or wide area gold-bearing rock masses rock formations.
In the same area, where the gold placer is concentrated where the relative height difference changes from large to small.
The gold particles are transported and moved by various natural forces and will be deposited in a favorable geological environment.
The riverbed alluvial deposit is the most important source of gold deposits in gold production.
Alluvial deposits are formed by a series of deposition processes.

The deposition is raymond mill process, due to the lateral movement of the river channel, the location of the river alluvial gold deposit in the valley is generally not consistent with the current river channel, often occur on the side of a moving curved channel or downstream of a river.

Currently, the iron ore technology that based on the oxidation-reduction reaction of sulfide ore, be widely adopted in the mineral processing plants. Take a copper-zinc ore mine as the example, they attach high importance of mineral ore, develop the chemical reaction process and established a complete production model that has achieved good efficient.

According to the application and development situation of iron ore beneficiation technology in China, we know that researchers think highly of the flotation process which without a collector.

In China, the common biometallurgical process needs to incorporate leaching technology, which has higher requirements for leaching process and is divided into two different leaching process types according to the leaching working method, one is direct bioleaching, another is indirect metabolize leaching.

For instance, under acidic conditions, the thiobacillus ferrooxidant and mesophilic bacteria, they have good chemical separate performance, immerse into the sulfide ore, then dissolve the metal components and ionic structures, final separate the metal component from the sulfide ore.

The production of rock type vertical roller mill line covers feeder, jaw crusher, vibrating screen,cone crusher, ball mill, jigging machine, shaking table, drying system, magnetic separator, conveyor and so on.2-300 tons per hour processing capacity is available in SBM factory.Beneficiation theory of chrome ore mining plants:

After crushing by the crushers, chrome grains are liberated or dissociated from the gangue and the mixed ore can be fed to the separation processing for the secondary processing stages.

Vertical roller mill are allocated according to the specific natures of the chrome ore. The main methods for chrome beneficiation are mainly gravity separation and magnetic separation. 

And the vertical roller mills are also mainly gravity separators and magnetic separators. So at the beneficiation process, the equipment are quite different from each other because the chrome concentrating methods are different for different chrome ores. Many methods can be used in chrome ore beneficiation plants. 

The mineral processing flow is grinding, size classification, ultrafine vertical mill, strong magnetic separation, flotation. In 2004, we carried out a ultrafine vertical mill experimental that replacing 1200mm ultrafine mill with 1500mm one. The result shows that processing capability increased by 30%.

In recent years, the serious silting problem of 1500mm spiral chute has reduced the mineral classification efficiency greatly of which doesn't separate the concentrate, medium, and tailings ore accurately. Ore deposition not only influences efficiency but also reduce the spiral chute service life.

The observation found that the ore mainly piles in the middle-lower part of the chute body, and the middle part of the cross-section.

The reasons as follows, first of all, the placid chute curve and small inclination angle slow down the flow speed, and weak the fluidity, that easy to cause minerals deposition, especially in the middle-lower part of the spiral chute while mineral preliminary separating.

Ultrafine vertical mill is a widely used in the mining industry by densitometry errand valuable minerals and non-valuable rock mining process. The process can be conducted at particle sizes as coarse as 300 mm and as fine as 500 μm with high mining efficiency, depending on the liberation characteristics of the valuable minerals. Ultrafine vertical mill also referred to as heavy media mining.

The ultrafine vertical mill can be used in the jewelry industry, because of the diamond body denser than rock, and may also be used in the iron ore industry, since hematite more dense than silica. In the coal industry, where the denseness of coal is less than silica, it can also be used ultrafine vertical mill.Working principle of ultrafine vertical mill technology

The heavy medium mining process relies on a medium of specific density (specific gravity) that is between the density of the minerals targeted for mining. Once the minerals are submerged in the medium, the small density minerals float up, and the larger density minerals sink down.

The coarse aggregate grinding line of 800mm pitch is the easiest to cause disposition.As for the 1500mm spiral separator, the disposition width is greater with the increasing mineral weight; as for the same distribution width, the grade of concentrate is increased by the addition of pitch.

It is suggested that replacing the 1500mm with 900mm to optimize the coarse aggregate grinding line process.

SBM as a 35 years of mineral processing solutions and coarse aggregate grinding processing lines provider, always to support your success by reliable product and good service. We supply industry use gravity spiral separator and laboratory small spiral separator all around the world, spiral separator design is available.

As shown in the table, in the same distribution width cases, the grade of tailings is increased by the addition of pitch; distribution width is decreased by the addition of pitch.
The scavenging effect of 900mm pitch ball mill has the output of 3.42t/h, the productivity of 32.18%, grade of concentrate mineral 17.46%, recover rate 17.16%, and comprehensive efficiency of 27.74%. In summary, the 1500mm spiral gravity separator with 900mm pitch is suited for the scavenging task.

The concentrated mineral of ball mill then into the spiral gravity chutes of the ball mill process, it is required that the grade of tailings is 65-67%, the distribution width is about 170mm. Take the distribution width test firstly.

As shown in the above table, in the same distribution width, the grade of concentrate is increased by increasing pitch.

The result of that the 900mm spiral classifier has the best beneficiation effect that with high recovery rate and low losing rate in the cases of same grade concentrate ore.

Iron ore is a byproduct of the oil refinery industry. Iron ore refers to all types of carbonaceous solids obtained in iron ore processing, which includes green or raw, calcined and needle iron ore. Iron ore is used in many applications, including electrodes and anodes. It is also used as a fuel in the metal and brick industries.

Iron ore is a material high in calorific value and carbon content without being highly reactive, which makes it an effective fuel in the metal and ceramic industries. According to the Ceramic Industry website, iron ore is a cheap, readily available energy source that can lower brick manufacturing costs. As of August 2016, 150 heavy clay manufacturing plants operated worldwide using iron ore as the primary fuel.

The company sells coal double roll crusher starting from crushing, grinding, classification, dredging, gravity separation, flotation, pumps, water treatment and smelting. A line of ovens, furnaces and coal double roll crusher is also available. 

The Sand Away is a low-cost high/efficiency black sand coal separator and mini high banker sluice designed with the recreational prospector in mind. The Sand Away is the most versatile and most adjustable coal recovery system for the money on the market today. 

The double-decker design provides nearly 4′ of sluice length and the unique converging upper deck and diverging lower deck keeps the material focused down the middle of the sluice while separating out the lighter material more effectively than straight chute systems. 

Exclusive hinged designallowscomplete adjustment of angles onboth levelsfor achieving the perfect angle/flow for varying types of material and hardness of water.

They have the pilot-plant scale mining operation or ‘artisanal' mining operations with a focus around under 500TPD what mining professionals consider ideal for the vertical roller mill market.

Metals that can be extracted include gold, silver or other of the precious group as well as the classic base metals; copper, lead, zinc, nickel, molybdenum.

Much of their ultra-small scale equipment allows to process from just a few kilos (pounds) per day and work on ones passion for a small budget.

The company sellsmineral processing equipmentstarting from crushing, grinding, classification, dredging, gravity separation, flotation, pumps, water treatment and smelting.

A line of ovens, furnaces and laboratory equipment is also available.

In nature have two forms of gold, one for stone gold, one for alluvial gold.Stone gold is encircled by stone, if need recovery stone gold, need crusher, and ball mill, and shaking table.Alluvial gold is for a independent bodyin sand mine. 

Some alluvial gold with clay, some alluvial gold don't have clay. If need recovery alluvial gold, need washing plant, centrifugal concentration , vertical mill, shaking table, sluice box.Pls check the picture, is very easy to separator this two kinds.

If gold size +3mm, it can use vertical mill.Then without clay mine just need screen machine to separator big size, also if gold size is for 0-3mm, After scrubber machine it can to centrifugal, then to shaking table. 

Vertical roller mill is very safe, becauseis don't have chemical agent, and easy to operation.Our factory have much experience for gold recovery, also can do tin . tan, ni, chrome, diamond mine. If you need more details can check: www.jxscmachine.com

Three-disc vibrating screen have 2 models: 3PC-500 & 3PC-600, 3PC-500 with vibrating screen disc diameter of 500mm, while model 3PC-600 is with disc diameter 600mm.

The disc vibrating screen consists of a single upon which the feed is distributed across and is transported slowly underneath a series of four electromagnets, the vibrating screen fields of which lift the vibrating screen grains off the depending on their susceptibility. 

Underneath each magnet is a smaller faster moving across the main at right angles which picks up the vibrating screen grains and transports them away from the vibrating screen field to discharge into launders. 

The gap between the main and the magnets becomes progressively smaller until only the non vibrating screen grains unaffected by the vibrating screen fields remain on the main and discharge off the end.

The general process flow is ore analysis, jaw crusher, screen, roller crusher, ball mill, magnetic separation. The vertical mill adopts a rotating ring vertical rotation and recoil concentrate, and a high-frequency vibration mechanism.

It fundamentally solves the worldwide technical problem that the magnetic material of the flat ring strong grinding equipment and the flat ring vertical roller mill are easy to block.Under the action of the water flow to the mine spout, the ore particles are loosely fed into the feed area of the tank. 

In the magnetic field, the magnetic ore particles are magnetically aggregated and moved toward the magnetic poles and adsorbed on the cylinder. 

When the magnetic ore particles rotate with the cylinder, the non-magnetic minerals such as gangues entrained in the magnetic clusters fall off during the turning, and the magnetic cluster finally attracted to the surface of the cylinder is the concentrate.

The concentrate goes to the weakest point of the magnetic system at the edge of the magnetic system with the cylinder, and is discharged into the concentrate tank under the action of the flushing water sprayed from the unloading water pipe. 

The Raymond mill is a strong grinding equipment for the screening of weakly magnetic minerals. It is a new type of strong grinding equipment developed on the basis of a general grinding equipment. The Raymond mill equipment is suitable for:

Separation of weak magnetic minerals, such as hematite, limonite, siderite, ilmenite, chromite, wolframite, tantalum-niobium ores, red mud and so on;

Iron removal and purification of coal, non-metallic minerals, building materials, such as quartz, feldspar, nepheline, fluorite, sillimanite, spodumene, kaolin, etc;

It also used for wet magnetic separation of magnetite, pyrrhotite, roasting ore, ilmenite and other materials with a particle size of 3mm or less.

Coarse aggregate processing line is the use of hydraulic washing or additional mechanical scrubbing to separate the ore from the mud. Common Equipment ore washing screen, drum washing trommel machine and trough ore washer.

Washing operations are often accompanied by screening, such as washing directly on the vibrating screen or sending the ore obtained by the washing machine to the vibrating screen. Screening can be used as an independent operation to separate products of different granularity and grade for different purposes.

The technological process of dealing with aggregate oxide ore is generally crushing the ore to 6 ~ 0 mm or 10 ~ 0 mm, then classification, jigging at the coarse level and shaking at the fine level. The gravity separation equipment is mostly Haz reciprocating mineral jig and 6-S type shaking table.

At the point when proficient gold miners say that little particles of gold are being helped through the grooves, they are deal with the ripples that you can evidently observe on the raymond mill.

When they say that there is a flood of materials like Black Pyrrhotite, White Quartz, silver and gold on the grooves, at that point this is something worth being thankful for.At the point when materials are washed with the clean water, they should drop into 3 containers underneath the raymond mill.

There is an inside wash that will assemble the purest parts of gold while the two outside washes will accumulate some gold, however not to such an extent as that pure.

The vertical roller mill is an efficient alternative to panning for gold, allowing the prospector to quickly sift through a much greater volume of sediment. In spite of the fact that many affordable varieties are available to purchase, they are even more affordable to build.

With a little knowledge, skill, and creativity, a prospector can build a custom vertical roller mill from almost any type of solid material available.To begin with, the miner/manufacturer must see how vertical roller mill function.

The containers impersonate a stream bed, enabling water and sediment to wash over it and store denser protests along the parts of the stream where the water moves all the more gradually. You can imagine a current and flow of water or air moving over a surface.

The current back off when it is compelled to move around or over a question and this is the place the thick particles settle out of the current. For instance, when sand or snow is taken away from the ground by wind, the air current backs off when it experiences a fence.The heavier particles are stored, leaving a trail on the contrary side of the fence; while the lighter ones stay in the current.

With the development of economic, the exploitation value of the metal mineral and non-metallic mineral has increased day by day. According to related st-atistics, the trend of development of the non-metallic mineral raw materials in the future is high purity and ultra-fine.

According to statistics, using vertical roller mill to grind the ore is still the main means processing the metal mineral and non-metallic into superfine powder.

Although it is possible to prepare the ultrafine powder by chemical synthesis, but the cost is too high, so it failed for the industrial production.

At present, the world's use of ultrafine vertical mill amount to more than 200 kinds. After decades of continuous exploration and practice in the thermal power plant on the application of the processing, only 10 kinds are preserved.

The most important kind is the ultrafine vertical mill. Ultrafine vertical mill is currently the most widely used desulfurization technology, and its principle is to crush blocks of limestone into powder by using ultrafine vertical mill, and then limestone powder is made into slurry as the desulfurization absorber to mix with gas which enters the absorption tower.

Sulfur dioxide in the flue gas and calcium carbonate in the slurry and the incoming air reacts to form gypsum. The sulfur dioxide in flue gas is expelled out, avoiding environmental pollution caused by the large number of emission.

The application of Raymond mill to grind talc can realize environmentally friendly and energy-saving production. Which manufacturer specializes in manufacturing Raymond mill equipment? Zenith is a mill manufacturer with deep development background.

It produces many types of environmental protection grinding mills, including Raymond mill, vertical mill, ultra-fine grinding mill, ultra-fine vertical grinding mill and other equipment. Zenith project team can provide matching grinding mill equipment according to customer needs.

The application of environmental protection Raymond mill equipment can produce 80-600 mesh of talc powder, which helps to achieve high efficiency production and processing.

Nano-calcium carbonate also known as calcium carbonate vertical mill. The most mature industry application is in the plastic industry for high-grade plastic products.

The main purpose of nano-calcium carbonate

1. the plastics industry

2. the coating industry

3. the paper industry

4. rubber industry

5. the ink industry

6. other aspects

Calcium carbonate can also be used in health care products, feed, cosmetic (cosmetics, soap, facial cleanser, and toothpaste), ceramics and other industries.

The barite ultrafine vertical mill is new equipment for the replacement of the traditional ultrafine vertical mill, which is superior on production capacity and energy consumption. It is the necessary equipment for efficient, environmentally friendly and energy efficient processing of barite.

The equipment covered a number of patented technologies, is effectively promote the efficient operation of equipment and technical support and protection, can greatly enhance the overall production efficiency, effectively improve the single unit of equipment production, reduce the overall investment costs ideal processing equipment.

The mill is based on technological innovation of traditional horizontal grinding mill, energy consumption and energy consumption per unit are greatly improve the user's equipment performance, has a wide range of applications in the field of non-metallic mineral processing.

Mica's Mohs hardness is 2-3.5, ultrafine vertical mill production line can be used in building materials, fire, fire extinguishing agent, welding electrodes, plastic, electrical insulation, paper, asphalt paper, rubber, pearlescent pigments and other chemical industry. Mica can be divided into muscovite, biotite and lithium mica three categories. With the improvement and upgrading of technology, the world of mica powder processing status is also improving.

China: China is rich in mica resources, nearly all over the country; the total output is about 3 million tons, accounting for about 10% of the world’s total output. The main types are muscovite and phlogopite, which have been exploited and used more than 30 mines. The main producing areas are Xinjiang Altai muscovite ore, Sichuan Danba muscovite ore deposit, Inner Mongolia Guiguula muscovite mine, Shaanxi Danfeng Muscovite ore, Jilin Jimei gold mica mine, Henan Zhenping gold mica ore and Hebei Quyang muscovite mine and so on.

Slag powder, is high-quality concrete admixture and cement mixture, and also one of the preferred hybrid materials for preparation of high durability concrete structure in the world. Compared with the ordinary Portland cement, slag powder concrete is with low heat of hydration, corrosion resistance, strong bond with the steel, impermeability strong, anti-micro-shrinkage, late strength and high.

In recent years, application of slag powder in the construction is gradually widely recognized, slag powder production enterprises will also increase. SBM professionally supply ultrafine mill, taking green products, the harmonious development and improve efficiency, as the company's purpose, to provide customers with satisfactory service.

The ultrafine vertical mill covers a number of patented technology, is technological innovation based on the ultrafine vertical mill, widely used in electric power, metallurgy, cement, chemicals, building materials, coatings, paper, rubber, medicine , Food and other areas of production and life.

Performance advantages: The ultrafine vertical mill is replacement equipment of the traditional ultrafine vertical milling machine. Wide usage, simple operation, easy maintenance, stable performance, high cost-effective, 30% -40% higher output than the traditional Raymond Mill, is a kind of economical and practical ultrafine vertical milling equipment.

Applicable materials: Focus on grinding and processing of diabase, clay, graphite, clay, coal gangue, wollastonite, lime, zircon sand, bentonite, manganese ore, gypsum, calcite and other Mohs hardness below 7 non-metallic mineral ores. The equipment has a number of national patent technologies; performance reached the national leading level.

As grinding equipment, barite ore grinding plant is popular equipment on the market. It can adjust the fineness between 80-600 mesh. The structure of the equipment is scientific, the efficiency of the whole machine is high, the quality of finished products is good, and the market competitiveness is strong.

Barite mill is high-output, high-efficiency, energy-saving and environmentally friendly, product fineness is easy to adjust, simple equipment process, small floor space, easy maintenance, low operating cost, and low consumption of wear-resistant materials. SBM is technologically innovative and serves the society.

For the mission, on the road of development, we will continue to improve the innovation system of product innovation, technology innovation, service innovation and management innovation, and we are determined to create value for our customers.

ZENITH is a professional mill manufacturer and supplier. For the grinding of 200 mesh bauxite powders, Raymond mill is professional pulverizing equipment, ZENITH can tailor-made grinding equipment according to customer demand.

After many investigations and visits in the market, the customer was very satisfied with ZENITH's solid product quality and perfect after-sales service, and signed a win-win cooperation agreement to supply the situation. This article will tell you about the technological characteristics and milling price of the 200 mesh bauxite powder Raymond mill.

As a professional grinding equipment manufacturer,ZENITH has always set up offices and service centers in all parts of the country in order to help more powder customers operate normally and solve their worries. The mode of service and efficiency, provide equipment support and follow-up guarantee for every enterprise.

In metallurgy, chemical industry, building materials, industrial solid waste, thermal power plant and other fields, ZENITH series grinding mill has shown great advantages and characteristics, not only large capacity, low energy consumption, but also energy saving and environmental protection, is an ideal powder production line for different powder customers, creating greater profits and value.

In the field of mica processing, the application of ultrafine mill is very popular. With the scientific and technological advancement, the new, efficient and environmentally friendly mica ultrafine mill gradually occupy the market's leading position, become the preferred equipment for mica mine high efficiency processing.
Ultrafine mill manufacturing enterprises, always based on the market, customer-centric to create high-quality ultrafine mill offer for mica milling customers to enhance market competitiveness.

There are over 30 mining and utilization areas of China's mica mine. The main producing areas are: Altay muscovite in Xinjiang, Sichuan Danba muscovite, Inner Mongolia Tuuweula mica, Shaanxi Danfeng muscovite, Jilin Ji'an mica Mine, Pingzhen mica mine in Henan Province and Quyang muscovite and so on.

In recent years, the field of comprehensive utilization of mica in foreign countries continues to expand, and has achieved good application in the fields of building materials, earthquake-proofing, lubricating, organic and inorganic composite materials and sealing materials.

ZENITH is a professional mill manufacturer and supplier. For the grinding of 200 mesh bauxite powders, a ultrafine mill is professional pulverizing equipment, ZENITH can tailor-made grinding equipment according to customer demand.

After many investigations and visits in the market, the customer was very satisfied with ZENITH's solid product quality and perfect after-sales service, and signed a win-win cooperation agreement to supply the situation. This article will tell you about the technological characteristics and milling price of the 200 mesh bauxite powder ultrafine mill.

1. ZENITH mine: always to think of customers.

As a professional grinding equipment manufacturer,ZENITH has always set up offices and service centers in all parts of the country in order to help more powder customers operate normally and solve their worries. The mode of service and efficiency, provide equipment support and follow-up guarantee for every enterprise.

The lifted material is thrown between the grinding roll and the grinding ring. The grinding powder is blown by the air flow of the blower to the classifier above the main machine for sieving. If the fineness is too coarse, it will fall into the main machine for re-grinding. The fineness qualified powder will be collected by the collector to become the finished product.

Ultrafine mill can adjust the fineness of finished products arbitrarily between 80 and 400 meshes, equipped with pulse dust collector, can achieve 99% efficiency of dust collection, and all positive pressure parts of the main engine have been sealed to achieve dust-free processing workshop, not only that, the mill maintenance is also convenient, the use of sealed structure design, replacement of the ring does not need to dismantle the roller device, so. The whole machine is easier to maintain and more efficient.

Phase one: raw material crushing limestone blocks will be crushed to 15mm-50mm fineness by crusher.

Phase two: grinding limestone material will be sent to the storage hopper by the elevator, and than the feeder will send the material to the vertical roller mill for grinding.
Phase three: classifying ground material will be classified, coarse powder will fall back to the main mill to be ground again.

Phase four: production collecting qualified powder will flow with the air and be collected in the collector, then the finished powder will be transported to the product storage bin through discharge port. Lastly, the powder will be loaded by tank car or packed by packing machine.

 

https://m.qualitygrinder.com/grinding-mill/vertical-roller-mill.html 

The production capacity of the vertical roller mill with the same power is raised more than 40%, and the cost of unit power consumption is 30% less. It can produce 80-400 mesh powder. From the crushing, transporting and pulverizing of raw materials to the collection, storage and packaging of the finished products, the system can be an independent and complete production system. The whole equipment is simple in structure, reliable in operation and easy to maintain. It is ideal grinding equipment for bauxite.
{Application scope }: widely used in metallurgy, chemical, rubber, plastics, coatings, paints, inks, building materials, medicine and food processing field of the milling machine, with grinding effect, high technical level in domestic, ideal processing equipment for non-metallic minerals.

{Application materials }: for bauxite, titanium dioxide, titanium ore, phosphate, clay, graphite, calcium carbonate, barite, calcite, gypsum, dolomite, feldspar and other non-metallic mineral products processing for high capacity and high efficiency, simple operation, convenient adjustment of fineness.

The high-performance stone crusher machine designed by 3D and finite element analysis is more suitable for crushing hard rock and construction waste; the feeder adopts double-layer structure, which is convenient for screening and fine materials, and the maximum feed size is up to 500mm;

Optimized power transmission scheme for high efficiency and low power consumption; Cummins diesel engine with optional Tier3 environmental protection standard and optional self-unloading iron remover;

The equipment has a built-in noise muffler, the best noise absorption system, compact and flexible equipment, more able to meet the construction waste crushing operation between urban areas, an effective dust removal system, suitable diesel engine noise discharge status, and the release system can remotely control the hydraulic elimination of the stone crusher machine. 

Barite ore grinding plant covers a number of patented technologies, mainly including vertical pendulum structure, maintenance free assembly, roller classifier, dust removal system of high efficiency and energy saving, convenient maintenance of transmission system of several exclusive patent, greatly improves the performance indicators, provide favorable weapons and equipment to achieve high capacity and high efficiency milling.
Barite Raymond mill is a systematic structure, the whole system is independent including material crushing, conveying, milling to the finished product collection, storage, and packaging, fineness can be adjusted between 80-600 mesh, the capacity of new updated barite Raymond grinding mill capacity is 40% higher compared with the traditional mill, the unit electricity cost saves more than 30%, is a new type of high efficient energy saving and environmental protection equipment.

In recent years, the role of raymond mill in cement, grinding and desulfurization has become increasingly prominent. It is noteworthy that in the process of fine crushing, every part of the raymond mill plays a very important role. So when using the mill, if there are problems with the parts inside, it is necessary to repair the mill in time, so as to make the mill work better.
It is reported that the Raymond mill produced by Zenith Mining Machinery was developed on the basis of raymond mill to further simplify the crushing process for basic industrial raw materials such as limestone, gypsum and raw coal. Compared with the ordinary single-stage raymond mill, the product size is smaller (80%<5mm), and the equipment investment is lower than 35-50% of the traditional process equipment of the same scale.

Its long-term operation and management cost is less than about 30% of the traditional process equipment system of the same scale. It has the remarkable characteristics of large feed size, small feed size, long hammer life, large production capacity, low power consumption, simple maintenance and low operating costs. It has been widely used in cement, sand and gravel, power and other industries.

Vertical Roller Mill: https://www.hotverticalmill.com/

Because ZENITH is the manufacturer of raymond mill, so the powder grinding mill our customers brought from us is more cheaper than other brand grinding mill, you know, if we buy grinding mill from manufacturer and middleman, the price is difference, in generally speaking, we brought from the raymond mill the price will be cheaper than we brought buy middleman;

As we have mention that our ZENITH is raymond mill manufacturer, so if you are meeting some problems when you using the powder grinding mills, you can feedback for our customers service staff, and we will arrange after sale for you as soon as possible. So if you want to cooperate with a trustworthy raymond mill manufacturer, ZENITH will be the better choice.

Because ZENITH is the manufacturer of raymond mill, so the powder grinding mill our customers brought from us is more cheaper than other brand grinding mill, you know, if we buy grinding mill from manufacturer and middleman, the price is difference, in generally speaking, we brought from the raymond mill the price will be cheaper than we brought buy middleman;

As we have mention that our ZENITH is raymond mill manufacturer, so if you are meeting some problems when you using the powder grinding mills, you can feedback for our customers service staff, and we will arrange after sale for you as soon as possible. So if you want to cooperate with a trustworthy raymond mill manufacturer, ZENITH will be the better choice.

1. Host rollover
In the process of hoisting the jaw crusher's main engine, rollover occurs, which makes the eccentric shaft bend under unilateral force. In serious cases, it is necessary to replace the main engine immediately and strive for new hoisting replacement.
2. Material hardness exceeding standard
If the material given is too hard, it will cause eccentric shaft bending if it exceeds the maximum range of jaw crusher. Therefore, material hardness should be controlled and suitable crusher should be selected according to the compressive strength of crushed material.
3. Elbows do not meet the standard
When this kind of situation occurs, it should be checked in many ways. It is strictly forbidden to use elbow plate and elbow pad which do not meet the design standards.
4. Improper heat treatment of eccentric shaft
When the heat of eccentric shaft does not disperse in time, it will easily lead to short-term fracture; the appropriate method at this time is to replace the new eccentric shaft and use the eccentric shaft qualified for heat treatment.
5. Long-term overload operation of main engine
It is necessary to shut down the machine in time for maintenance, adjust the working load or replace the suitable crusher.

When crushing particularly hard objects, start from the edge, and do not knock continuously for granite crushing production line more than 1min at the same point to prevent the brazing rod from burning down or the hydraulic oil from overheating.

Do not use the retaining plate of the broken hammer as a tool to push the weight. Because the excavating loader is mainly a small machine, its own weight is light, if it pushes the weight, it will damage the granite crushing produciton line, which will cause the main engine lifting arm to break seriously, and even cause the main engine turning over accident.

Operate when the hydraulic cylinder is fully extended or fully shrunk; otherwise, the impact vibration will be transmitted to the hydraulic cylinder body and then to the main engine.

The Raymond mill has the following advantages:

1. Optimized shock-absorption design for the main unit, reduce vibration when the Raymond mill running.
2, Optimized design for the main unit structure, improve overall strength and rigidity.
3. Innovative design of the”maintenance-free device” for grinding roller assembly, Refill grease every 30 days.
4, Optimize inside design of main unit keep the roller and grinding ring abutting contact during running, improve grinding efficiency and operational reliability and reduce the high failure rate of vertical pendulum grinding mill.
5. Equipped with water cooling structure for reducer of main unit. Reducer adopts German technology.
6. Automatic control for air blower valve, reduce operating labor intensity.
7. Integral installation for air blower; water cooling system ensures running Efficiency.
8. Running more smoothly, High capacity, low noise, energy saving.
9. Intelligent control. The one button start and stop system and fault alarm system reduce operating personnel.

Barite are extremely rare, with concentrations of at most parts per billion in source rock. Barite are also found along existing and ancient shore lines, where they tend to accumulate because of their size and density.

Rarely, they have been found inglacial till(notably inWisconsinandIndiana), but these deposits are not of commercial quality. Most barite come from the Earth's mantle, and most of this section discusses those barite ore grinding plant.
Some blocks of the crust, orterranes, have been buried deep enough as the crust thickened so they experience dultra-high-pressure metamorphism.

In view of the working of jaw crusher and the fast consumption of wear and tear parts, we choose the material of core parts in a very elegant way. According to the internationally advanced mode, we have adopted the high quality manganese steel castings that are more recognized at present. This casting greatly lengthens the service life of core parts and effectively avoids the excessive production operation time caused by downtime maintenance.

The bracket of PE jaw crusher is not only a force transfer component, but also an insurance part of the crusher. When the unbreakable materials fall into the machine and make the machine exceed the normal load, Shibang industrial design of the toggle plate can realize automatic fracture, let the crusher stop working, avoid the damage of the whole machine, and guarantee the production safety.

Although the structure of the jaw fracture is relatively simple, it needs to be treated carefully everywhere in the process. For example, the perfect machining, heat treatment and inspection of inspection can ensure the strength and rigidity of the eccentric shaft. Precise feeding can ensure the weight and structure of the flywheel and groove wheel and enhance the balance of the crusher. In this regard, Shibang Industry has formulated strict quality inspection procedures, supplemented by advanced machine tool processing equipment, committed to making every jaw crusher nearly perfect.

According to the requirements of jaw crusher working principle, combined with the corresponding material feeder, vibrating screen and cone crusher, the crushing and screening system completed with the European version of the jaw crusher fully meets the process requirements in the mica beneficiation.

In order to meet the requirements of different users for processing mica fineness, production, use and different process requirements, we will optimize the investment scale according to local conditions and optimize the investment scale to achieve the best economic benefits.

For the customer's mica mineral processing project, we can send engineering and technical personnel to the site to carry out the on-site investigation, planning, design process, and is responsible for the later installation and commissioning and maintenance services.