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2.5.6 Distribution of slurry in ball mill charge 70 2.6 Net power draw of a ball mill as affected by slurry pool 75 2.6.1 Introduction 75 2.6.2 Torque-arm approach 77 2.6.3 Energy balance approach Morrell's model 78 2.6.3.1 Active charge of the mill 78 2.6.3.2 Window of applicability of the active charge model 81 2.6.3.3 Velocity profile of

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