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HomeEvaluation of airtight furnace technology (reduction of air ingress in EAF)
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The objective was to test airtight electric arc furnace (EAF) technologies and evaluate their benefits, at pilot and industrial scale. For the pilot-scale study, reference and airtight trials were carried out. ln airtight conditions, a bricked wall was built at the door location. The main results are summarised below. - The mean specific air ingress is around 220 Nm3.h-1.t-1 for reference trials (common value for industrial EAF), and from 100 Nm3.h-1.t-1 to 40 Nm3.h-1.t-1 in airtight conditions. - ln airtight conditions, the sensible heat of the fumes leaving the furnace is extensively reduced (between - 66 kWh/t and - 110 kWh/t) but, without a specific process, the thermal gain is compensated by a lack of post -combustion energy. - Additional airtight trials with post-combustion practice displayed a - 179 kWh/t reduction of electric energy consumption, from air ingress reduction and thermal loss reduction. Extrapolating this result for an industrial EAF leads to a potential gain of around 100 to 120 kWh/t but requires to reach a high level of airtightness (80 % reduction of air ingress with mechanical tightness and fume control) and control of the process (post -combustion). The operating practice of the Carsid Marcinelle furnace was moved, aiming to close the slag door as long as possible, involving a reduction of 8 kWh/t in energy consumption. A comparison of two furnace operations at ProfilArbed Esch-Belval (normal/more airtight) has been carried out. The air ingress reduction was around 5 to 10% and the observed gain of 13 kWh/t is thus coherent with pilot trial results.
- Published:
- Corporate author(s): Directorate-General for Research and Innovation (European Commission)
- Personal author(s): Nyssen, P ; Ruby, F ; Huber, J. C
- Themes: Industrial research and development
- Subject: applied research , industrial research , iron and steel industry , iron and steel-working machinery , metalworking , production improvement , steel
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| ISSN | ISBN 92-894-9840-4 | DOI | Catalogue number KI-NA-21692-EN-S |
- Released on EU publications website:
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