The raymond mill machine is used for grinding the barite, limestone, kaolin, cerames, ahd slags, etc, below scale 9.3 of Mohs hardness and 280-odd sorts of non-inflammable and non-explosive stuff in the trades of mining, metallurgical industrial, chemical engineering and building material for high fine powder generation and processing. The mill size is adjustable in the range of 80-325 (600 the largest) meshes. It is possible for the raymond mill to product 30-80 mesh coarse powder through special device in the machine.