High-pressure roller mills used in the mineral industry,building industry,chemical industry and metallurgy industry.It is used for high fineness production of more than 400 kinds of non flammable and non-explosive materials of Mohs hardness less than 7 Richter scales,humidity below 6%,such as quartzite,feldspar,barite,fluorite,dolomite,garnet,carborundum,bauxite,zircon sand,marble,calcite,iron ore,phosphate ore,coal briquette,ceramic,slags,etc.The final product particle size can be adjustable between 40 and 800 meshes.