... , sepiolite, palygorskite, rectorite, diatomite, barite, gypsum, alunite, graphite, fluorite, phosphorus ore, ore of potassium, pumice humidity is less than 6%, Mohs hardness ... more than 45% of high yield than the jet mill and mixing mill with the same product fineness and power consumption. 3 ... 325mesh to 2500mesh6. Energy saving &little pollution HGM ring eccentrifugal mill, grinding mill