SAG mill circuits are typically operated with Ball Mills (BM) that are in closed circuits with a group of hydrocyclones as classifiers. The feed slurry to the cyclone (CF) contains 58% solids (wt.), the cyclone overflow (COF) slurry is 40% solids and the cyclone underflow (CUF) slurry is 70% solids. To operate mills and hydrocyclones at indicated slurry densities, water additions are made at the two points indicated. a) Calculate the circulating load into the Ball Mill (BM) circuit through CUF (in \% wt.) b) If the dry ore feed tonnage from the stockpile to the SAG mill is 2000 tonnes/h and the SAG mill discharges to the pump box at 70% solids (i.e., same as the BM discharge at 70% wt.), how much water must be added to the SAG mill? Note that pebble crushing is essentially a dry process. c) Considering that the BM side is in a closed circuit, how much water must be added to the pump box to maintain a cyclone overflow density of 40% solids (wt.)