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HomeResource-saving operation of stainless steel refining in VOD and AOD processes
Resource-saving operation of stainless steel refining in VOD and AOD processes
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The argon oxygen decarburisation (AOD) and the vacuum oxygen decarburisation (VOD) processes are the dominant methods for refining stainless steels with low carbon contents. The objective of this project was to improve the operation and control of stainless steel refining within the VOD and the AOD processes by various methods. Detailed investigations with CFD-based process models coupled to thermodynamic equilibrium calculations have revealed fundamental insights to reaction kinetics and mixing times. Statistical evaluations of extensive slag analyses regarding chemical composition as well as phase structures during the oxidation phase have provided indications on how to accelerate the decarburisation process. Plant trials with different schemes for the vessel pressure and injection of oxygen via oxides in scale powder were carried out in order to examine alternative VOD operation modes with respect to a more effective decarburisation. Possible influences of scale injection on the steel cleanness were also investigated. The results of these extensive numerical, experimental and statistical studies were used for the development of dynamic process models which were then validated by offline simulations based on process data from AOD and VOD plants. In a next step, dynamic control functions were developed which evaluate the heat states observed and predicted by the dynamic process models. Finally, these models with their monitoring and control functions were implemented and tested within the automation environment of AOD and VOD plants. The online application of the models contributes to a more reliable and resource-efficient operation of the respective processes.
- Published:
- Corporate author(s): Directorate-General for Research and Innovation (European Commission)
- Personal author(s): Ersson, M ; Lindstrand, G ; Klinar, M ; Ternstedt, P ; Tilliander, A ; Schlautmann, M ; Andersson, J.-O ; Jaklic, A ; Kubbe, A ; Teworte, R ; Kleimt, B ; Rzehak, D ; Gyllenram, R
- Themes: Basic metals industry, steel industry , Industrial research and development
- Subject: industrial research , iron and steel product , materials technology , research and development , resistance of materials , sheet , testing
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| ISSN 1831-9424 | ISBN 978-92-79-22239-9 | DOI 10.2777/30457 | Catalogue number KI-NA-25087-EN-N |
- Released on EU Publications:
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