... SiO2, Fe2O3, CaO and MgO.♦ Brown Fused Alumina is characterized by good toughness, high mechanical resistance ... a raw material in the manufacture of high alumina refractory. 2. Applications:♦ Wet and dry blasting ... precision casting 3. Grit Size Available (P, F):P series: P8, P10, P12, P16, P24, P30, P36 ... , P600, P800, P1000, P1200, P1500, P2000, P2500, P3000F series: F4, F8, F10, F12, F14, F16, F22, F24 ...