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From the development of a semi-autogenous grinding model based on effective grinding rates and internal classification presented during the nineties (Magne et al., 1995) the state of the art of the mathematical structure of this model was updated, presenting the development of each subprocess from the inside of the mill in detail, considering grinding, internal classification, and mass transport.

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SAGMILLING.COM .:. Mill Critical Speed Determination. The Critical Speed for a grinding mill is defined as the rotational speed where centrifugal forces equal gravitational forces at the mill

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A comparison of SAG mill power models - SAGMILLING.COM SAG Mill power draw models are used in mill design and grinding circuit modelling to predict . Ball charge is not explicitly used in the power formula, but is considered in the mill charge density formula: 1.

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