HIPS, PA, PBT, unsaturated polyester, epoxy resin, rubber, paint flame retardant filler, chemical industry, environmental protection and other industrial fields; used in plastics, rubber and other high polymer materials excellent retardant and filler, in environmental protection as flue gas desulfurizer, can replace burning and lime as acid-containing wastewater neutralizer; used as oil additives, anti-corrosion and desulfurization for electricity. Subindustries, thermal insulation materials and other magnesium salt products.