the machine is suitable for grinding more than 280 kinds of non-inflammable and non-explosive materials with the hardness below scale 9.3 of moh’s and the moisture content below 6%, such as barite, limestone, kaolin, ceram and slags, etc, in the trades of mining, metallurgy, chemical engineering and building material for high fine powder generating and processing. the product size is adjustable in the range of 80-425 meshes. it is possible to product 30-80 mesh coarse powder through special device in the machine.