2.4 Mathematical Models for Grinding Energy Calculation After carrying out sieve analysis of the powder, the final weight mean diameter (L2) was evaluated by:
where Dp is the average of the aperture sizes of the sieve and dU is the mass fraction of particles of diameter Dp. Further, Kick’s, Rittinger’s constants and Bond’s (Work index), were calculated as per the following equations: Kick0s law : E ¼ KKIn
KK and KR are the Kick’s and Rittinger’s constants respectively. E is the net energy required for grinding and Wi is the work index. L1 and L2 are the weight mean diameter of feed and final product. But, in the case of Bond’s law, L1 and L2 are the particle sizes corresponding to 80% cumulative undersize mass fraction with respect to feed and final product, respectively.