Do you have an idea of each point decreased in the standard deviation of the kiln feed and how it affects to the specific heat consumption? (for example: 40kJ/kg of clinker for every additional 0.1 by which the standard deviation is raised in the usual range).

The effect of kin feed standard deviation on unit energy consumption is complex and is likely to vary from kiln to kiln. For a precalciner kiln each one per cent increase in the standard deviation of the kiln feed lime saturation factor you might expect an increase in the energy consumption by 150kJ/kg clinker. However, this relationship is unlikely to be linear and will vary around that figure from kiln to kiln.

We have ESP at the kiln system. It is also used for raw mill system. System is sent ESP's feedback to kiln feeding silo. There are two homogeneous silos and two stockage silos. Material is sent from ESP to homogeneous silos. So, my question is that, I am thinking to feed the ESP's feedback directly to preheater system but this line will be entered to system after weighfeeder. We have got line to feed this material before weighfeeder but it causes to reduce of fresh feeding. In this way I want to increase clinker production with same feeding amount. What do you think?

How can we reduce the clinker size -5mm >35 per cent (existing),we want to reduce to under 20 per cent. Our plant is a 1Mta capacity unit. Fuel is pet coke 70 per cent balance Indian coal.