Brief information WFA white emery sand grit 36 was made from the high quality alumina by melting above 2000 in the electric arc furnace and cooling. WFA white emery sand is white with the main crystal phase alpha-Al2O3. The WFA white emery sand 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. Al2O3 99.50min Color White SiO2 0.08max Bulk density 3.65-3.85/cm3 Na2O 0.26max True density 3.95-3.97g/cm3 Fe2O3 0.06max hardness 9 Usage Abrasive tools ,sand blasting content of magnetic substance 0.0023%max SIZE: emery sand grit 36 46 60 80 100 120 150 180 220 Mills:WFA white emery sand plants Sales Company:Zhengzhou Haixu Abrasives Co.,Ltd