... non-metallic powders, such as calcium carbonate heavy, calcium carbonate light, talcum, kaolin, graphite, wollastonite, brucite, barite, mica powder, bentonite, diatomite, clay and ... as catalyst, cement, abrasive, pharmaceutical, agricultural pesticide, food, paint, dyestuff, fluorescent powder, river sediment, ceramic raw material, and various emulsion and so ...