... /90/85/80/70 Brown fused alumina for buffing Product Description: Brown fused alumina is made by bauxite as main ... purification ,crystal, choosing, magnetic, screening, etc. The brown fused alumina of our factory had high purity,detailed texture,high stacking ... are: coconut shells and husks, coal, woods, cylindrical products, powdered activated carbon, PAM, PAC, anthracite filter media, quartz sands, ...