Grinding Media Wear Rate Calculation in Ball Mill
Recapitulation of Ball Wear Formulas. Nw = number of balls added in time T to compensate for the ball wear. Nt = total number of balls in the mill. Nt = total number of balls in any interval. N1, N2, N3, etc. = number of balls in the first, second, third, etc., intervals. D = diameter of any ball under consideration.