A new control strategy for IKN-type coolers

This paper presents a new system for the optimized control of IKN-type cement coolers based on adaptive predictive methodology. The new system introduces the concepts of ’layer on grate’ and ’thickness of slope’, which allow a decoupled multivariable control of the layer of clinker over the grate, and the flow rate of the cooler fans, solving a fundamental control problem for this type of process and maximizing the heat transfer from the cooling process to the kiln. The experimental results obtained in the Gador mill of Holcim, in Almeria (Spain), are analyzed.

► Development of estimated variables from plant measurements.
► Adaptive predictive control of those estimated variables.
► Development of a new control strategy for IKN-type coolers.
► Optimization of the clinker cooling process.