... used in refractory industry. Sizes:0-1,1-3mm. Brown Fused Alumina is made by high quality bauxite as main material, fusing ... Density3.90g/cm3 minMohs Hardness9Micro HardnessHV1800-2200 Size Available: Abrasives F12-F1200,P12-P2500Refractory 0-1mm,1-3mm,3-5mm ... casting5.Refractory materials including low cement castables,plastics,bricks etc. Brown fused alumina for coated and bonded abrasive tools