VDEh (BFI) GmbH, Düsseldorf:

B. Kleimt, Dr.Eng., Head of Office, bernd.kleimt@bfi.de

Hüttenwerke Krupp Mannesmann, Duisburg:

M. Weinberg, Dr.Eng., Chief Technologist

J. Bongers, Dr., Head of Project of Steel Production

Peiner Träger GmbH, Peine:

M. Schöring, Eng., Head of Steelnaking Shop

Within liquid steelmaking an important control parameter with relevance for energy consumption is the adjustment of the target casting temperature. To avoid an unnecessarily high energy input in the BOF or the LF a system for through-process prediction of temperature evolution within the complete steelmaking route has been developed. The scheme of temperature evolution during the liquid steelmaking process at Hüttenwerke Krupp Mannesmann (HKM) is presented. Current process routes in the electric steelmaking plant of Peiner Träger GmbH (PTG) are also displayed. It is shown that energy consumption can be decreased by optimal temperature control. Scheme of through-process temperature control for HKM process route and tracking of the ladle in the electric steelmaking plant of PTG are shown as examples. Onits basis the adjustment of the BOF tapping temperature respectively the electrical energy input in the ladle furnaceis optimized, so that further temperature control actions during ladle treatment like cooling scrap addition or intensive stirring can be minimized. Melt temperature loss rate on the ladle treatment time since BOF tapping and steel temperature loss rates for different ladle conditions at PTG are given. On-line prediction of melt temperature evolution for calculation of set-point for BOF tapping at HKM and the same prediction for LF energy input at PTG are compared.

1. Kleimt, B.; Zisser, S.; Weinberg, M.; Bongers, J.: Through process dynamic prediction of melt temperature evolution for optimised energy input and temperature control in oxygen steelmaking, Proc. Metec InSteelCon 2007, 11.–15. Juni 2007, Düsseldorf, S. 168/75.

2. Kleimt, B.; Cappel, J.; Hoffmann, J.; Sheng, D.; Landa, S.: Rev. Métallurgie (2003) Nr. 6, S. 583/93 .

3. Cappel, J.; Kaiser, H.-P.; Schlüter, J.: Time management at the HKMHuckingen BOF shop, Proc. 4. Europ. Oxygen Steelmaking Conf. (EOSC) 2003, 12.–15. Mai 2003, Graz, Österreich.

4. Ponten, H.; Kleimt, B.; Grob, S.; Heesen, M.: Cast in time and quality: energy savings through integrated heat temperature forecast and scheduling model, Proc. AISTech 2010, 3.–6. Mai 2010, Pittsburgh, USA, Vol. I, S. 1 013/25.