white corundum / polishing powder

Description: White corundum, a kind of high-grade refractories, was made from the high quality alumina by melting above 2000 in the electric arc furnace and cooling. It is white with the main crystal phase alpha-Al2O3. The white alumina produced in titling electric arc furnace has the advantage of high bulk density and low porosity and the volume stability and thermal shock resistance can be improved. Usage: (1)Itcan be used in grinding and polishing the gold, silver jewellery, the eye glass, bearing andany kind of precision instrument.(2)It can be used in manufacturing the superfinishing stone.(3)It can be used in making the superior refractory products.The chemical and physical analysis: Model:JIS#4000 Chemical compositions Physical propertiesItemsValue of specification (%) ItemsPropertyAl2O3 99.25minColorWhiteSiO2 0.04max Bulk density1.75-1.95g/cm3Na2O 0.29max Grain density3.90g/cm3 minFe2O3 0.06maxhardnessMorse hardness9Micro hardness21600-22600kg/mm3Usagepolishing,grinding,sandblastingcontent of magnetic substance0.0023%max Mills: white fused alumina plants brown fused alumina plants black silicon carbideplants green silicon carbide plants About us: Henan Sicheng Co., Ltd, owning two manufacturing enterprises for abrasives and machinery respectively, is a comprehensive joint-stock company integrating production, R&D and trade. Our company has been specializing in abrasives and machinery for over 10 years, and enjoys a good reputation for our best quality and service.