There are a number of methods to acquire mill power draw
data. The simplest way is to use the direct plant measurement
data. Note that the mill power draw data used in the model is
the net power, i.e. the gross power less the no-load power. If
directly measured mill power data is not available, mill power
can be predicted by the Morrell Power model (Morrell, 1992).
The Morrell Power model explicitly incorporates mill geometry
and operational conditions in the power calculation. This renders