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According to the D90 standard for the required material fineness (90% of the material reaches the predetermined fineness), crushers can be divided into crushers (below 60 mesh), crushers (60-120 mesh), ultrafine crushers (120-300 mesh), and ultrafine crushers (above 300 mesh).

There are four types of external forces applied to the material during the crushing process: rolling, shearing, impact (impact), and grinding. Rolling is mainly used for coarse and medium crushing, suitable for crushing hard and large materials; Shearing is primarily used for crushing or crushing, suitable for crushing durable or fibrous materials; Impact (impact) is mainly used for crushing and depolymerization, suitable for crushing brittle materials; Grinding is primarily focused on ultra-fine grinding and ultra-fine grinding, suitable for ultra-fine grinding after medium to fine grinding.