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How to design a Ball Mill (4 replies)
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E= 10 Wi (1/√P80- 1/√F80)
E= Specific Energy, Wi= Work Index,P80= Output,F80= Feed
After this we need to multiply certain factors such wet/dry Factor, Separation Factor, Dia. factor, Open/Closed Circuit Factor etc..
E= 10 Wi (1/√P80- 1/√F80 * C1*C2*C3*C4*C5*C6
After This we multiply throughput Volume (Q)
Specific Power (P)= QE which gives Total Power consumption (KW).
We assume Critical Speed as 70% of Nominal RPM with 30% of Grinding Charge.
Question1:- How do we determine Nominal RPM optimum for Grinding?
Question2:- How do we determine Dia. Of Mill?
Question3:- How do we determine Length. Of Mill?
Question4:- How do we determine L/D ratio for wet closed Mill with specific throughput?
Question5:- How do we determine the F80 for Grinding Mill so that the P80/P68 is in 106/75 microns?
Question6:- Does Length & Diameter determine Critical Speed/ Nominal RPM?