Raw mills usually operate at 72-74% critical speed and cement mills at 74-76%. 3.2 Calculation of the Critical Mill Speed . in a ball mill should be . Questions .

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Get Price And Support OnlineBall Mill Critical Speed - 911 Metallurgist. Mar 17, 2017 . A Ball Mill Critical Speed (actually ball, rod, AG or SAG) is the speed at which the centrifugal forces equal gravitational forces at the mill shell's.

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Get Price And Support OnlineThe Critical Speed is used for the determination of ball mill ideal operating speed. But for comparison, rod mills would operate between 50% to 95% of the critical speed.

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