The harder the material is, the more difficult vertical roller mill is to make sand, and the more serious the abrasion of the equipment is. The speed of sand making is slow, of course, the sand making capacity is small. This requires us to be moderate in the selection of materials.
The higher the fineness requirement, that is, the finer the material required for sand making, the smaller the sand making capacity.
In this respect, it depends on the specific requirements of the concentrator. If there is no special requirement, the fineness of the material is generally set to medium fine.