In general, for wet grinding, load the alumina grinding ball to 44%-51% of the ball mill volume can get the ideal grinding performance.

Formula for the load of alumina grinding ball:

M=π×(D²÷4)×L ×α×(1-β)×ψ

M: Alumina grinding load, in tons
π: Circumference ratio, 3.14
D: Ball mill diameter, in meters
L: Ball mill length, in meters
α: Ideal stacking volume of the alumina grinding ball to the ball mill capacity, 44%-51%
β: Void rate of the stacking alumina grinding ball, 40%
ψ: Alumina grinding ball density, in ton/m³