... ~ 55%, the basic particle size is to guarantee the effect of grinding is an important index in production should be appropriate ... of the earliest established manufacturers produce of corundum quality is better. Also have Burma, Thailand, Sri Lanka, ... 5-8mmappearancegranulecolorwhiteproductwhite fused alumina for refractory(white corundum)active principleAl2O3country of originchinasize0-1,1-3,3-5, ...