... widely used as a raw material in refractories, ceramics shapes, grinding wheels, sandpaper, blasting media, metal preparation, laminates, coatings, lapping, polishing, grinding and hundreds ... materials. Zhengzhou whale refractory Co.,LTD John duan Brown fused alumina use high-quality bauxite as main raw material, it is made ... 1.8≤3 brown fused alumina/brown fused aluminum oxide/refractory material