... 4.95/90/85/80/70 Brown fused alumina for buffing Product Description: Brown fused alumina is made by bauxite as main material ... purification ,crystal, choosing, magnetic, screening, etc. The brown fused alumina of our factory had high purity,detailed texture,high ... rust sands, sponge iron, medical stones, ceramic filters, manganese sand filters, zeolite filters, fillers, bulk bauxite, corundum, white ...