Motor Sizing Determination

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Mill Power, kW KiloWatts
 Balls
Fraction of the Total Mill Power Draw contributed by the Ball Charge.
 Overfilling
Fraction of the Total Mill Power Draw contributed by the Overfilling Slurry on top of the "kidney".
 Slurry
Fraction of the Total Mill Power Draw contributed by the Interstitial Slurry in the ball charge.
 Net Total
 % Losses
 Gross Total Mill Draw (kW)
FIX SPEED MILL ONLY
Mill Charge Weight, tons
Apparent Density ton/m3
Corresponds to the ratio between the Total Charge Weight and its Apparent Volume (including interstitial voids).
Charge Volume m3
Ball Charge
Slurry Interstitial
Slurry above Balls
MILL DIMENSIONS AND OPERATING CONDITIONS :
Eff. Diameter (ft)
Mill Diameter, inside liners.
Eff. Length (ft)
Effective Grinding Lenght.
Mill Speed % Critical
Rotational Mill Speed, expressed as a percentage of the critical centrifugation speed of the mill.
Mill rpm
Charge % Filling
A)
Balls % Filling
Interstitial Slurry Filling,%
C)
Lift Angle, (°)
D)
Mill Charge Weight, tons
% Solids in the Mill
Ore Density, ton/m3
Slurry Density, ton/m3
Balls Density, ton/m3
BALL MILL MOTOR-POWER SIZING CALCULATION
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