... 2000; 2) Competitive prices; 3) Excellent performance alumina; 4) Ideal refractory .raw materials. 1) For crystal,quarz glass,hard glass and other ... high purity calcined alumina,used in a wide range of refractory applications,such as,fired shapes,iron,and steel making ... alumina is adopt with high quality of industrial AL2O3,as raw material into high temperature kiln and scientific controled.So ...