... alumina/brown corundum used as refractory and abrasive raw material in sand blasting, steel and iron casting brown fused alumina/ ... brown corundum/abrasivesused as refractory and abrasive raw material in sand blasting, steel and iron casting, ramming, grinding wheel ... , using bauxite as raw material. High hardness and toughness, it is an important raw material of abrasive and refractory industries. It ...