Speaker
Description
Temperature control is crucial in metallurgical processes. The correct temperature regime during slab casting is essential from a high qualitative perspective. Moreover, incidents like casting abortion because of too low temperature or outbreaks have to be avoid for safety reasons as well. After reviewing the state of the art available temperature models the decision was made to develop a temperature model at voestalpine Stahl GmbH in Linz. A physical model based on thermodynamic equations of state programmed and put into operation at the secondary metallurgy in Linz.
The present paper describes the fundamental considerations based on the specific needs of the Linz steel plant with one- and two-strand casting machines. Aim and benefit were defined by the internal customer. The accuracy of the model was tested using an industrial dataset featuring several 1.000 heats covering the different metallurgical production routes and huge steel grades variety.
Based on the model a temperature prognosis is established and compared with production data. The limits of the prognosis are estimated by analytical and technical limits as well as metallurgical variations throughout the production. The temperature model was implemented in Dec. 2020. Since then it is operating successfully and permanently optimized.