According to the D90 standard of the required material fineness (90% of the material reaches the predetermined fineness), the crusher can be divided into crusher (below 60 mesh), crusher (60-120 mesh), superfine crusher (120-300) Mesh), superfine grinder (above 300 mesh).
There are four types of external forces applied to the material during the crushing process: rolling, shearing, impact (blow), and grinding. Rolling is mainly used for coarse and medium crushing, suitable for the crushing of hard materials and bulk materials; shearing is mainly used for crushing or crushing, suitable for crushing of tough or fibrous materials; impact (strike) is mainly used for crushing and decomposing Poly, suitable for the crushing of brittle materials; grinding is mainly used for ultra-fine grinding and ultra-fine grinding, suitable for ultra-fine grinding after medium-fine grinding.