An increase of over 10% in mill throughput was achieved by removing the ball scats from a singlestage SAG mill. These scats are nonspherical ball fragments resulting from uneven wear of balls with included porosity. 30t of scats were removed from a total charge load of 70t. Surveying and modelling the mill revealed that the breakage rates
Using a ballnosed endmill comes at the price of decreased speed and depth of cut. On a vertical milling machine, the ballnosed endmill will mean that the cut has to be made from the top down. This will require the barrel to have additional support underneath. A 3/16″ PTG fluting cutter (left) and solid carbide ballnosed endmill (right).