After practice for years and continuous improvement,the technical indicators of raymond mill have increased greatly and the structure has been perfect. It has advantages of low land ,low investment and no environment pollution,etc. So it is widely used in powder  grinding processing of mineral materials in metallurgy ,building materials,chemical,mining and other fields. Raymond mill suited to all kinds of  non-inflammable and non-explosive stuff with the hardness below 7mohs scale and the humidity below 6%,such as gesso,talc,fluorite ,iron ore ,manganese ore, phosphate rock,clay ,pottery clay, titanium iron ore ,grind barite ,calcite ,potash feldspar ,talcum ,marble, limestone and ceramics, kaolin bentonite, maifanshi,bauxite ,oxidation iron oxide red , etc, the fineness is from 613 to 440 micron. Through the analysis of the common function of machine and fan, it can satisfy different operating requirements of users.