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Critical speed of ball mill derivation

Ball Mill Critical Speed Mineral Processing Metallurgy. 19/06/2015 A Ball Mill Critical Speed Charge movement at Various Mill Critical Speed The Formula derivation ends up as follow: Critical Speed is: N c =766(D 05) where: N c is the critical speed,in revolutions per minute, D is the mill effective inside diameter, in feet Example: a mill measuring 11’0” diameter inside of new shell

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