Raymond mill is a common grinding equipment. It is mainly used for high fineness production of nonflammable and non explosive minerals, chemicals, building materials with mohs hardness less than 7 richterscale, humidity below 6%, the final product particle size can be adjusted between 40 and 400 meshes. Thesuitable minerals are barite, calcite, potash feldspar, limestone, talc, dolomite and gypsum, etc.