... grinder mill is widely used in making fine powder or micro powder, a new kind of machine for producing fine ... , such as: calcite, chalk, limestone, dolomite, kaolin, bentonite, steatite, mica, magnetite, iolite, pyrophillite, vermiculite, meerschaum, attapulgite, diatomite, barite, gypsum, ... the roller and the ring for grinding.The grinded powder goes into classifier along with the circulation wind of ...