Opening height and size of classifier: In the installation process of Vertical roller mill, if the size of classifier opening is not adjusted properly, it will affect the grinding operation and grinding fineness.

Therefore, in the process of installation and production of Vertical roller mill, attention should be paid to check the size and height of the opening of classifier. Hardness of raw materials: For different materials, their hardness is different.

The hardness directly affects the grinding difficulty and fineness of Vertical roller mill, so the harder the material is, the greater the grinding degree. In the process of using Raymond grinder, reasonable ingredients should be used to ensure the uniformity of material size and the fineness of grinding.