#### PDF Effects of Mill Rotational Speed on The Batch Grinding Kinetics of A ...

platinum ore in a batch mill of 5 dm3 and 175 mm internal diameter. One size fraction method was carried out to perform the experiment. Five monosized fractions in the range of mm to mm separated by √2 series interval were prepared. The fractions were milled at different grinding times (, 2, 4, 15 and 30 min) and three