The crusher is a machine that crushes large-sized solid raw materials to the required size.

According to the size of the crushed material or crushed material, the crusher can be divided into coarse crusher, crusher, ultrafine crusher.

There are four kinds of external forces applied to the solid in the grinding process: shear, impact, rolling and grinding. Shearing is mainly used in coarse crushing (crushing) and crushing operations, suitable for the crushing or crushing of ductile or fibrous materials and bulk materials; Impact is mainly used in crushing operations, suitable for crushing brittle materials; Milling is mainly used in high fineness grinding (ultrafine grinding) operations, suitable for most properties of materials for ultrafine grinding operations; Grinding is mainly used for ultrafine grinding or super large grinding equipment, suitable for further grinding operations after grinding operations.

The actual crushing process is often several external forces acting at the same time, but high-end shredders are tailored according to the crushing environment.