... under condition of negative and positive pressure.is widely used in the field of metallurgy, building materials, chemical ... and mining to process powder. The series is used in grinding the non-flammable and non-explosive stuff ... marble, feldspar, barite, dolomite, granite, kaolin, bentonite, bauxite, iron ore etc., the final products change from 613 micron to 44 ... 4.515 High-pressure Raymond mill in sell