Cement Raw Material Milling

Cement raw material milling has the objective of producing a homogenous raw meal from a number of components that are sometimes variable in themselves. The feed moisture contents are generally between 3 and 8%, but sometimes also over 20% by weight.

The increasing throughput rates of vertical roller mills kept pace with the rise in kiln line capacities.
At cement raw material milling plant, 16000 tpd of raw material is ground by two mills for a clinker output of 10 000 tpd. Cement mill runs at its warranted capacity of 420 tph. However, at a different plant in India the same size of mill achieves a grinding capacity of 745 tph.
Large ball mill with several independent grinding rollers allow Cement raw material milling operation to be maintained even if one roller or one pair of opposite rollers fails , so that at least partial-load operation of the kiln line is possible.

The fine material passes to the separator for finished product collection. Oversize material is also returned from there to the roller press.