Exercise 6-6 Ball mill circuit - Energy-based model for porphyry

Repeat exercise 6-5 using the Herbst-fuerstenau model. Use the power that was calculated in exercise 6-5 (1.48 MW).

Selection function parameters for this ore are:

S1E = 0.3 tonnes/kWhr

zeta1 = 0.3

zeta2 = -0.25

Breakage function parameters are:

beta = 3.723

gamma = 0.748

delta = 0

Phi5 = 0.72

This exercise provides a good opportunity to observe the behavior of the circuit processing this ore as the power input to the mill varies. Run the simulation several times varying the power input in steps from 3000 kW down to 1300 kW. Plot the circulating load as a function of the power and observe the size distribution graphs at each power level. This will give you a good idea how to interpret the four size distribution graphs as the mill handles less and less of the comminution load.