| Title: | Optimization of partial stainless steel melt oxidation in the EAF |
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| Authors: | ID Bajželj, Anže (Author)
ID Burja, Jaka (Author) |
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| Files: |  PDF - Presentation file, download (706,28 KB)
MD5: BB502E24D78C84384082F44E2A50F7B9
 URL - Source URL, visit https://www.confer.cz/metal/2024/4868-optimization-of-partial-stainless-steel-melt-oxidation-in-the-eaf
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| Language: | English |
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| Typology: | 1.08 - Published Scientific Conference Contribution |
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| Organization: |  IMT - Institute of Metals and Technology
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| Abstract: | Stainless steel production typically follows the duplex process, beginning with the electric arc furnace (EAF) and proceeding to the vacuum oxygen decarburizer (VOD) or argon oxygen decarburizer (AOD). The EAF's role is to melt the charge and heat it up for further processing, reducing tap-to-tap times through partial oxidation. However, this partial oxidation in the EAF leads to chromium losses as oxygen interacts with the high chromium steel melt. To address this issue, parameters affecting chromium burn-off have been identified and presented. A primary challenge in EAF steel production with elevated chromium content is to lower carbon levels while maximizing chromium yield in the melt. Unlike VOD and AOD processes, which permit low carbon and high chromium levels through vacuum or argon blowing, the EAF provides limited protection, mainly through silicon. At higher temperatures, carbon oxidation predominates, hence it is important to limit oxygen input into the system in the initial stages, while “protecting” the chromium with silicon. During the oxidation phase of the steel melt, carbon content decreases; however, attention must be paid to ensure that the concentration is not too low, as this increases chromium activity in the melt, leading to more intense oxidation. A practical model, derived from thermodynamic calculations, has been developed to guide carbon, chromium, and other element oxidation during scrap melting. This model, validated through industrial trials, aids in optimizing steel melt oxidation to minimize chromium losses effectively. |
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| Keywords: | EAF, stainless steel scrap, carbon oxidation, chromium oxidation, thermodynamics |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 02.12.2024 |
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| Publisher: | TANGER |
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| Year of publishing: | 2024 |
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| Number of pages: | Str. 19-24 |
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| Source: | Češka |
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| PID: | 20.500.12556/DiRROS-21212  |
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| UDC: | 669.14:536.7 |
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| ISSN on article: | 2694-9296 |
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| DOI: | 10.37904/metal.2024.4868 |
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| COBISS.SI-ID: | 222588419 |
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| Copyright: | Licenca Creative Commons je navedena na pristajalni strani članka (glej izvorni URL): "© This is an open access article distributed under the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/)". (Datum opombe 16. 1. 2025) |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 15. 1. 2025;
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| Publication date in DiRROS: | 16.01.2025 |
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| Views: | 21 |
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| Downloads: | 9 |
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| Metadata: |    |
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