Raymond mill is widely used in dolomite, limestone, potash feldspar, barite, calcite, talcum, marble, fluorite, active white soil, activated carbon, bentonite, kaolin, cement, gypsum, glass, etc. These materials' Moh's hardness is no more than, and the humidity is below 6%. This is a nonflammable and nonexplosive mineral process, containing about chemical industry, .