# ball mill critical speed formula derivation

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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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A ball mill is a type of grinder used to grind and blend materials for use in mineral ... Critical speed can be understood as that speed after which the ...

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A Ball Mill Critical Speed (actually ball, ... Use our online formula The mill speed is typically defined as the percent of ... The Formula derivation ends up as ...

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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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