... great concentration and on the basis of many years of powder processing experience. HGM series of Three-Ring & Medium ... mohs, such as calcite, chalk, limestone, dolomite, kaolin, bentonite, talc, mica, magnesite, pyrophillite, ceyssatite, barite, gypsum, alunite, granite, fluorite ... air into the mill and carries the powder after third turnplate into powder-separator. Turbine in the separator makes the ...