... of alumina in an electric arc furnace. White electro corundum is iron-free, ultra pure and extremely ... hard.White electro corundum for Abrasive and Refractory spec: ItemsUnitIndexTypicalChemicalcompositionAl2O3%99. ... )FEPA16, 24, 46, 100,180,220,F12-F220White electro corundum for Abrasive applicationReusable abrasiveGrinding, lapping and polishing mediaCeramic ...