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.