... .Usages:Pollution treatment: Stone wastewater, dyeing wastewater, leather wastewater, printingCeramics class: kaolin, superfine glass powder, fire-proof material, silica sand, spray ... materials, artificial black lead, hydrated lime, mica, aluminum oxide, calcium carbonate.Food: sugar, salt, alkali, monosodium glutamate, soya-bean milk, yeast ...