The image above represents shaft power | ball mill length.

To compute for shaft power | ball mill length, six essential parameters are needed and these parameters are **Value of C, Volume Load Percentage (J), % Critical Speed (V _{cr}), Bulk Density (s.g), Mill Length (L)** and

**Mill Internal Diameter (D).**

The formula for calculating shaft power | ball mill length:

P = 7.33 x C X J X V_{cr} x (1 – 0.937) x [1 – ^{0.1}/_{29 – 10Vcr}] x s.g. x L x D^{2.3}

Where:

P = Shaft Power | Ball Mill Length

J = Volume Load Percentage

V_{cr} = % Critical Speed

sg = Bulk Density

L = Mill Length

D = Mill Internal Diameter

Let’s solve an example;

Find the shaft power | ball mill length when the volume load percentage is 8, the %critical speed is 10, the bulk density is 3. the mill length is 14 and the mill internal diameter is 16.

This implies that;

J = Volume Load Percentage = 8

V_{cr} = % Critical Speed = 10

sg = Bulk Density = 3

L = Mill Length = 14

D = Mill Internal Diameter = 16

P = 7.33 x C X J X V_{cr} x (1 – 0.937) x [1 – ^{0.1}/_{29 – 10Vcr}] x s.g. x L x D^{2.3}

P = 7.33 x 1 x 8 x 10 x (1 – 0.937) x [1 – ^{0.1}/_{29 – 10(10)}] x 3 x 14 x 16^{2.3}

P = 36.94 x [1 – ^{0.1}/_{2-91}] x 3 x 14 x 588.133

P = 36.94 x [1 – ^{0.1}/_{4.038e-28}] x 24701.609

P = 36.94 x [1 – 2.47e+26] x 24701.609

P = 36.94 x -2.475e+26 x 24701.609

P = -2.259

Therefore, the **shaft power | ball mill length **is **– 2.259 W.**