... 4.95/90/85/80/70 Brown fused alumina for buffing Product Description: Brown fused alumina is made by bauxite as ... purification ,crystal, choosing, magnetic, screening, etc. The brown fused alumina of our factory had high purity,detailed texture, ... sand filters, zeolite filters, fillers, bulk bauxite, corundum, white corundum, black corundum, silicon carbide, spinel and other refractory products. Strong ...