Preparation: crushing and grading, sometimes including washing and pre-selection;
1. The crushing stage: coarsely crushed, mediumly crushed, and finely crushed. Generally, the factory is divided into three sections or two sections;
2. Screening operation: meet the grinding grain size requirements, avoid over-grinding, and improve the crushing efficiency; the mesh number represents the number of mesh holes within 1 inch length, and 200 mesh means 200 holes;
3. Grinding operation: dissociation of useful mineral monomers and meeting the granularity requirements of specific beneficiation methods. Generally, the plant is a one- or two-stage closed-circuit process with the highest power consumption; grinding fineness is important for judging feasibility. index;
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