Detailed Product Description It is as hard as white aluminum oxide, as tough as brown aluminum oxide. It is a kind of high-grade refractory and grinding materials, the specific gravity 3.9g/cm3, the degree of refractory 1850 Physical chemical performance indexGritChemical Composition(%)Al2O3TiO2Fe2O3SiO20-50mm98.001.000.300.78-5mm98.001.000.300.75-3mm98.001.000.300.73-1mm98.001.000.300.71-0mm97. ...