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critical speed calculation of ball mill

Thecritical speedn (rpm) when the balls remain attached to the wall with the aid of centrifugal force is: n = 42.3 D m. where D m is themilldiameter in meters. The optimum rotationalspeedis usually set at 65%–80% of thecritical speed. ... It is possible to make an approximatecalculationof the capacity of aball millwith uneven armor ...

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