Correction Factors in Example Calculation for Ball Mill Sizing

In this example, correction factors 1 and 2 are not applicable.

CORRECTION FACTOR 3

CORRECTION FACTOR 4. Oversized Feed

CORRECTION FACTOR 5

P80 = 84 microns
P80 > 74 microns
CF5 = 1
   
CORRECTION FACTOR 6 is not applicable
CORRECTION FACTOR 7 is not applicable

The final calculated horsepower is obtained by multiplying the previously calculated base horsepower bye each applicable correction factor.

Final calculated horsepower is:

(1030 hp) (938) (1.067) (1) = 1031 hp

… in this instance, not much difference from the uncorrected value.

The mill size form pp. 10-11 corresponding to the calculated horsepower is therefore the same, 11’6” x 15’.

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