Raymond mill is a common grinding equipment.It is mainly be used for high fineness production of non- flammable and non-explosive minerals,chemicals,building materials with mohs hardness less than 7 Richter scales,humidity below 6%,the final product particle size can be adjustable between 40 and 400 meshes.The suitable minerals are barite,calcite,potash feldspar,limestone,talc,dolomite and gypsum,etc.