1. Al2O3 99.30%MIN 2.sufficient supplies 3.A grade, pure & ... . The physical and chemical analysis:Model:WA3-5mmItemsUnitIndexChemical CompositionAl203%99.60minSiO2%0.04maxFe2O3%0.03maxNa20+K2O%0.03maxMelting Point 2250Refractoriness ... hotel, bauxite mine, carbon plant, ceramic proppant factory, medium alumina grinding ball factory. With the close cooperation of these industries, our group is ...