Alumina bricks are widely used in all kind of ball mills, liners of mixer. They can improve grinding efficiency, reduce the pollution for the materials, and also can increase usable cubage, promote the productivity and reduce the cost. Specific properties of bricks a Items Value Al2O3(%) ≥90 Fe2O3(%) ≤0.5 Bulk density (g/cm3))≥3.55 Water absorption (%) ≤0.2 mohs Hardness ≥9