Brown aluminum oxide is fused in an electrical arc furnace from a mixture of bauxite, coal, scrap rion at high temperature. The appearance is brown colour. It has high hardness and great toughness. The tools made of brown aluminum oxide are suitable for grinding carbon steel, normal alloy steel, malleable cast iron and hard bronze. In refractory industry,it is suitable for refractory aluminum oxide lining mixture,pouring materials, castable and refractory brick,etc.

It is on kind of brown aluminium oxide grain with equaled volume grain shape