Expert Optimizer for Alternative Fuel Precalciner Kilns at Holcim Lägerdorf

This article details the challenges and results of using alternative fuels in modern precalciner kilns, focusing on a two-year operation at Holcim’s Lägerdorf plant. It describes how ABB’s Expert Optimizer with Model Predictive Control (MPC) and Mixed Logical Dynamics (MLD) stabilized the calciner temperature, reduced variability, and enabled coal-free operation.