... from above that are suitable for the grinding of high carbon steel, high speed steel and quenching steel. They are also used ... spraying abd coating materials, chemical catolyst carrier, soecial ceranics and high refractory materials. Major technical parameters: projectparameterAl2O3≥90%SIO2≤8%Fe2O2 ... *3hThermal conductivity W/m,k≤1.0refractoriness1790 best-selling and high quality brown fused alumina