White corundum physical and chemical indicators:  Use Specifications The main chemical components% Al2O3 Na2O SiO2 K2O Fe2O3 Abrasives   F 12#60# ≥99.15 ≤0.26 ≤0.08   ≤0.05 60#-100# ≥99.15 ≤0.28 ≤0.09   ≤0.06 120#150# ≥99.1 ≤0.29 ≤0.10   ≤0.08 180#220# ≥99.05 ≤0.31 ≤0.12   ≤0.1 230#-800# ≥98.5 ≤0.5 ≤0.15   ≤0.1 1000#-1200# ≥98.1 ≤0.6 ≤0.18   ≤0.1 W W#-63# ≥98.5 ≤0.6 ≤0.15   ≤0.1 W10-W5 ≥98 ≤0.7 ≤0.15   ≤0.1 Refractories   Sand paragraph   0-1mm 1-3mm 3-5mm 5-8mm 10-20mm 1/0.3mm 0-0.3mm 1-2mm 0.5-1.5mm ≥99.4 ≤0.35 ≤0.3 ≤0.05 ≤0.1 Powder 100mesh0 200mesh-0 325mesh-0 ≥99.4 ≤0.35 ≤0.3 ≤0.05 ≤0.1 Note: F for the consolidation and abrasive blasting with the specifications for the W powder. Alumina powder with the ball, the ball mill lining of alumina production.

White corundum physical performance:                                  Item                           Indicators Color  White Crystal system  The six-party body                         Hardness (Mo's) ≥9.0                  True Densityg/cm3 ≥3. 95 Linear expansion coefficient(1/°C)  8.3×10-4                  The proportion of song ≥3.6                                  Porosity ≤8.5