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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 ###### formula for calculating critical speed of a ball mill

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Calculation of the power draw of dry multi-compartment, fCs – Fraction of critical speed Ss – Ball size factor To determine the power that a dry grinding needs, full grate discharge mill ###### 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 critical speed ###### how to calculate critical speed of ball mill

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