... grinder mill is widely used in making fine powder or micro powder, a new kind of machine for producing fine ... , iolite, pyrophillite, vermiculite, meerschaum, attapulgite, diatomite, barite, gypsum, alunite, graphite, fluorite, phosphate ore, potassium ore pumice, etc. The size of ... the roller and the ring for grinding.The grinded powder goes into classifier along with the circulation wind of ...