brown fused alumina

our custom visit our factory Brown fused alumina oxide symbol A Brown fused alumina is fused and crystalized under high temparature from amixture of barxite and other raw materials. It is characterized by its high hardness,good toughness and sharp in size. Abrasives tools mead of it are suitalbe for grinding metals of high-tensile strength such as:carbon steel,general-purpose alloy steel,annealed malleable iron and hard bronze,etc.It also can be used as refractory materials. brown fused alumina Chemical composition(%) GB/T2479-1996Chemical Composition(%,by weight)TypeGrit SizeAl2O3TIO2CaOAA-P116-150#(P16-150)95.00-97.501.50-3.80≤0.45180-220#(P180-220)94.00-96.00220# finer≥92.00A-BA-P216-80#(P16-80)≥93.001.50-4.20-----90-220#(P100-220)≥91.00220#(P220)finer≥90.00≤4.50-----A-S16-220#≥92.00≤4.20----- According to costomer`s requirement,various spec of group sizes and mixed sizes also can be supplied. Its reference chemical somposition is as following. (mm)Main Chemical content(%)Other chemical content(%)Group sizesAl3O2≥94.50SiO2≤1%ZrO2≤0.28-55-3CaO≤0.5MgO≤0.43-11-0TIO2≤3.8Fe2O3≤0.4