# ball mill critical speed formula

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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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Ball Mill Critical Speed | 911M. Jun 19, 2015 ... A Ball Mill Critical Speed (actually ball, rod, AG or SAG) is the speed at which ... The Formula derivation ends up ...

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Correlations for the Grindability of the Ball Mill ... and speed of the ball mill ... The critical speed is calculated as under . R r g 2 1 n

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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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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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