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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