... Al2O3 99.53%...........NaO 0.3%.........Fe2O3 0.1%......... Magnetic material content 0.0023%.....color white …… ... electrically fused in the furnace with high grade bayer processed alumina as raw material..It ... body for chemical industry,special ceramics and high-grade refractory materials,etc.Abrasives gradeGrit size: 16#, ... #,1200#,1500# 2000#,2500#,3000#,4000#Refractory grade:1-0mm,3-1mm,5-3mm,5-8mm - ...