Raymond mill widely used in grinding equipment of mine, cement, chemical industry, is one of the important equipment of non metallic mineral deep procession. Since its strong stability,adaptability and high cost performance it has popularized in non metallic mineral processing field. Applied in grinding various non plastic ore, mineral soil,metallic oxide, chemical composition etc. which Mohs hardness not more than grade 7,humidity less than 6% non flammable and combustible material such as speckstone, dinas rock, graphite, fluorite, magnesia stone, bentonite, kaoline, pottery clay etc.