12 Nov,2015 UTC+8 Views:
1.Cement ball mill sizing method introduction:
The method is used to size a cement ball mill.
Efficiency correction factors are applied with the Bond equation.
The method is valid both for clinker grinding and for raw materials grinding.
This method only gives a rough and initial idea for sizing a cement ball mill. To go ahead, a deeper study is necessary with ball mills suppliers or a specialized engineering office.
Two calculators have been developed for sizing mono chamber mills and two compartments mills.
2 Bond equation and correction factors:
E = specific energy in kWh/t
WI = work index in kWh/t
C = correction factor
P80 = sieve which has 80% of passing in the product
F80 = sieve which has 80% of passing in the feed
Efficiency correction factors are giving by the following equation:
C2, a correction for open circuit
C3, a correction for mill diameter,
C4, a correction for feed size,
C5, a correction for product fineness,
C6, a correction for high-efficiency separators.
