... fused in an arc furnace from a mixture of bauxite, coke (anthracite) as main raw materal ... chemical composition contains Al2O3, TiO2, and small amount of SiO2, and Fe2O3, etc,. Microhardness:1800-2200 kg ... silicon carbide. Abrasive articles made of it is suited for grinding metals of high-tensile strength such as ... have free time in china. Hongtai Hot selling!!! high purity brown fused alumina