Acrushing plantdelivered ore to a wet grindingmillfor further size reduction. The size of crushed ore (F 80) was. 4.0 mm and the S.G. 2.8 t/m 3. The work index of the ore was determined as 12.2 kWh/t. A wet ballmill1 m × 1 m was chosen to grind the ore down to 200 μm.