Analysis of grinding kinetics in a laboratory ball mill 01/11/2019· The subscript T refers to the laboratory test mill conditions and results C1 C2 and C3 are respectively related to mill and ball diameter Also C4 and C5 are related to ball and powder loading level Table 4 shows the values of the grinding parameters for each condition determined in this manner a was decreased from to as 1 cm 4 lifters progressed to 2 cm 12 lifters condition