... iolite, pyrophillite, vermiculite, meerschaum, attapulgite, diatomite, barite, gypsum, alunite, graphite, fluorite, phosphate ore, potassium ore pumice, etc. The size of ... and the ring for grinding.The grinded powder goes into classifier along with the circulation wind of the blower and ... constant pressure between the roller and the ring hence to be ensured,the stable output and fineness. Grinder Mill ...