The preparation of cement raw materials is a link of cement production. The cement raw materials is formed with calcareous materials, clayey materials and slight corrective material in appropriate proportion, and grinded into certain fineness. The raw material production of cement plant can be classified into four steps: crushing, grinding, mixing and homogenizing.

1. Crushing: the limestone and other materials are crushed into small pieces by cement crusher, such as hammer crusher, cone crusher, jaw crusher, impact crusher, etc.
2. Mixing: according to the requirement of clinker, compound desired raw material for cement production line.
3. Grinding: grinding all materials into required fineness by cement mill. Cement ball mill and vertical cement mill are two common types.
4. Homogenizing: homogeneous kiln feed is the precondition of clinker production, so homogenization of raw materials guard a pass of cement plant.