Blasting media 14# 16# White korund grain White korund grain was made from the high quality alumina by melting above 2000 °C in the electric arc furnace and cooling. White korund oxide is white with the main crystal phase alpha-Al2O3.The White korund 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. Product Name White korund Material AL2O3 Al2O3 99.2% Fe2O3 0.04% Na2O 0.26% SIO2 0.02% Bulk density 3.60g/cm3 Mohs Hardness 9.0 Quality Control