Effect of ball load and size distribution on grinding and classification performance

Abstract

An industrial test work was performed to analyse the effect of applying a lower ball load and a finer ball size distribution in the second compartment of a KHD Humboldt Wedag® ball mill on grinding and classification performance of a hybrid high pressure grinding roll (HPGR)/multi-compartment ball mill cement grinding circuit. Mass balance of the circuit was done by JKSimMet Steady State Mineral Processing Simulator. Specific discharge and breakage rate functions were estimated by using a perfect mixing modeling approach [1]. The performance of the dynamic air separator was determined by using an efficiency curve approach