Mill Steel Charge Volume Calculation- ball mill grinding media calculation ore processing ,Mill Steel Charge Volume Calculation View Larger Image We can calculate the steel charge volume of a ball or rod mill and express it as the % of the volume within the liners that is filled with grinding media.Grinding Media Calculation - mill grinding media calculation pdf - MTM Crusher . effects of grinding media shapes on ball mill performance. Spherical grinding media are predominantly used in final stages of ore grinding.