Multi-criteria through-process optimisation of liquid steelmaking (TOTOPTLIS) : final report

The main objective of the TOTOPTLIS project was the development of a model-based through-process optimization system to be applied at the liquid steelmaking routes of three different oxygen and electric steelmaking plants. The focus of this development was laid on the specific operational requirements regarding liquid steel temperature and quality control in the respective steel plants, which were individually identified by the different industrial partners. Analytical and data-based process models were developed respectively adapted, and combined for through-process monitoring and prediction of liquid steel temperature and composition for selected relevant elements. The prediction models were combined with optimization tools to derive corrective actions for through-process control, to achieve the target values for temperature and composition of liquid steel under minimum costs with maximal productivity. For each steel plant finally a case- study was performed to investigate on the applicability and transferability of the new control concept, and to estimate the expectable industrial benefits.