brown corundum 1) High Al2O3 Content: 95%min 2) Professional manufacture 3) Hot sale overseas 4) Passed ISO9001:2000 brown corundumI1. Introduction Brown Alumina Oxide is made by high-quality bauxite as main material, fusing and purifying in a pouring electric arc furnace at a temperature of over 2200°c, and made into different grain size through crystal, choosing, crashing, magnetic, separating, ...