POWER DRAW OF WET TUMBLING MILLS AND ITS RELATIONSHIP TO CHARGE DYNAMICS .2. AN EMPIRICAL-APPROACH TO MODELING OF MILL POWER DRAW

Part 1 of this two-part contribution presented a mathematical model, b ased on the dynamics of the charge and termed the ''C-model'', for pre diction of the power draw of tumbling mills. Part 2 describes a simple r, empirical model (the 'E-model') whose performance is based on that of the C-model. The database of industrial ball-, semi-autogenous and fully autogenous mills that was collected for the validation of both m odels is described in detail. The database is used to assess the predi ctive capabilities of the E-model, showing it to be only slightly less accurate than the C-model despite its much simpler structure.