If the actual speed of a 6 ft diameter ball mill is 25 rpm, calculate its . The critical speed of a ball mill is . Calculation of optimum speed . >>Chat Online

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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 inside ...

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This formula calculates the critical speed of any ball mill. Most ball mills operate most efficiently between 65% and 75% of their critical speed.

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