Optimum choice of the make up ball sizes for maximum ...
Sep 01, 2013· For a single size of make up ball, the mass fractions in the mill within the size ranges are calculated from: m k = d k u 4 Δ d k l 4 Δ d max 4 Δ d min 4 Δ where d k u and d k l represent the upper and lower boundaries of the ball size interval k, d max is the largest ball size in the mill, and d min is the smallest ball size in the mill which is still retained.