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critical speed of ball mill calculation formula in turkey

The Formula derivation ends up as follow Critical Speed is N c 76.6D 0.5. where N c is the critical speed,in revolutions per minute, D is the mill effective inside diameter, in feet. Example a mill measuring 110 diameter inside of new shell liners operates at 17.3 rpm. Critical speed is. C.S. 76.63 110.5 23.1 rpm

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