where the ore is broken up. liberated particles are. pure either all gangue or all mineral. locked particles are. ... ball mill autgenous mill (AG) (rock on rock) ... rod or ball tumbling mill charge are balls and or rocks hydrocyclone separates on the basis of size/weight
When the proportion of pebbles in the mill charge was low (up to 30%), the larger pebbles wore away significantly faster than expected, based on a constant surface wear rate. This could be due to size segregation in the mill. CITATION. Nkwanyana S and Loveday B. Addition of pebbles to a ballmill to improve grinding efficiency.