... arc furnace at a temperature of over 2200 celsius degree, and made into different grain sizes through crystal, choosing, crashing, ... ,3-5mm,5-8mm,200mesh,325mesh Applications:1.Coated and bonded abrasive tools2.Lapping and polishing processes3.Sandblasting4.Producing mold of precision casting5 ... low cement castables,plastics,bricks etc. Brown fused alumina for coated and bonded abrasive tools