The grinding circuit of a zinc concentration plant is shown in Figure 2. The plant is treating 250tph of ore containing 4% moisture. The cyclone underflow contains 50% solids by volume, the overflow 30% solids by weight and the ball mill discharge 45% solid by volume. The circulating load ratio of the circuit was found to be 300%. Solids density (2.8t /m?). Calculate: OF= 30% CF water? 250tph 4% Moisture water =? x= 4596 x= 5096 BM PUMP Figure 2: Grinding Circuit-Zinc concentrator 2.1. The mass flowrate of the addition water to the ball mill. 2.2. The mass flowrate of the dilution water (sump water)