813 power drawn by ball semiautogenous and autogenous mills a simplified picture of the mill load is shown in figure 83 ad this can be used to establish the essential features of a model for mill power the torque required to turn the mill is given by torque t mcgdc t f 89 where mc is the total mass of the charge in the mill and tf is the torque required to overcome friction power 2 nt 810 for mills of different diameter but running at the same fraction of critical speed
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Get PriceBall mills the starting torque restrictions of some of the newer mill drive configurations and the softness speed is given by the following calculation time wk2x speed change 308 x avg acc torque trains used with ball mills because of the torque shock calculation of load torque in cement balls
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Get PriceMay 01 2017 the power of a ball mill is obtained by multiplying the corresponding torque with the mill speed thus the torque curves and power curves are similar fig 20 shows 78 groups of dem simulation results for the effect of rotation rate lifter height and lifter number on the power draw of the ball mill each curve represents the variation of the
Get PriceNotes critical speed formula for ball mill in meters a ball mill critical speed actually ball rod ag or sag is the speed at the formula derivation ends up as follow critical speed is nc 766d05 revolutions per minute d is the mill effective inside diameter in feet mill critical speed
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Get PriceTorque speed calculation for ball mill 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 surface and no balls will fall from its position onto the shell the imagery below helps explain what goes on inside a mill as speed
Get PriceTorque values before and after optimization on a large mill drive a time signal of the torque when the hammer mill was switched on and views of two torque measuring locations torque measurements for calculation of torsional
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