Abstract
In Part II the relation between the relevant dynamic variables and the power required to drive a ball mill containing both balls and powder charge is established; this being an extension, to the practical case of a mill grinding a powder, of the results, given in Part I of the paper, of an investigation into the dynamics of a mill containing a ball charge only.
By means of the results of Part II the power required to drive a mill, in which a granular material is being dry ground, may be calculated with an accuracy sufficient for design and operational purposes.
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