... Series Ultrafine Mill is widely used in making fine powder or micro powder, a new kind of machine for producing ultrafine ... powder. It is mainly used for grinding the material ... , such as: calcite, chalk, limestone, dolomite, kaolin, bentonite, steatite, mica, magnetite, iolite, pyrophillite, vermiculite, meerschaum, attapulgite, diatomite, barite, gypsum, ...