Calculation of rolling pressure distribution and force .
With many grinding mills — including roller mills, rotor mills, hammermills, air-classifier . bed opposed-jet mill's pressure drop is much more complicated than for a hammermill, however. The largest pressure drop occurs when the air passes through the classifier wheel. This pressure .High pressure roller mill is used in 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 9.3 richter scale, humidity below 6%, such as quartzite, feldspar, barite, fluorite, dolomite, garnet, carborundum, bauxite, zircon sand, marble .