... grinder has opened a new time of ore grinder with high efficiency and low energy consumption. The grinding machine ... from various non-flammable and non-explosive mineral materials with Mohs’ hardness below 9.3 and humidity at 6 ... porcelain clay, kyanite, fluor-spar, bentonite, medicinal stone liparite, diabese, pyrophyllite, shale, red stone, emeraldite, basalt, gypsum, graphite, carborundum, heat ...