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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 = mm and r = 50 mm n c = 307 rpm ### ATTRITORS AND BALL MILLS HOW THEY WORK

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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 ### Ball mill Wikipedia

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Procedure 1 Determine the radius of ball mill and the balls 2 c =Critical speed of ball mill g= Gravitational force R= Radius of the mill ### how to calculate critical speed of ball mill

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