charge for the grinding mill pdf

charge the grinding is achieved mainly by friction 2 It is necessary to correlate the specific charge with the mill is described by the relation 6 20 15 2 8 40 40 16 Ψ− Ψ⋅ − n D ncr D ϕ 6 where D is the inside diameter of the drum and n represents mill speed measured in rpm ncr D 30 ⋅ 2 critical speed

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