Increase the residue on both the 90 micron as well on the 212 micron sieve of the raw mill product ,by decreasing the high efficiency separator speed, by trial and error, so as to ensure what is the ideal fineness for burning of the rawmeal in the purpose process system i.e. the clinker rotary kiln plant system of your integrated cement manufacturing complex or the blended cement grinding unit complex.

Reduce mill , main fan outlet draft and increase air recirculation damper the goal is to increase DP Inside mill
And check for feeding size