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

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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 ...

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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TECHNICAL NOTES 8 GRINDING RP King - Mineral Technologies . The critical speed of the mill, &c, is defined as the speed at which a single ball ..

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Calculations: The critical speed of ball mill is given by, where R = radius of ball mill; r = radius of ball. For R = 1000 mm and r = 50 mm, n c = 30.7 rpm.

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