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.