Cement Milling Part II Ball Mill
Contents
Cement milling circuits
Particle size distributions
Separators types
Separator performance
Mill circuit modelling
Cement Milling Circuits
?Why Close Circuit
Fine grinding is not energy efficient
media coating
cushioning effect from fines
less flaws in smaller particles
Close circuiting allows coarser grinding but need separator to separate out coarse particles and return to mill.
A narrower particle size distribution may be desirable in certain cases
Disadvantage is that power consumed by extra ancillaries (elevator, separator etc.) may offset power saving in mill
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