Suitability of self-reducing and slag-forming briquettes for electric arc furnace use based on laboratory tests
Abdelrahim, Ahmed; Aula, Matti; Iljana, Mikko; Willms, Thomas; Echterhof, Thomas; Steinlechner, Stefan; Mombelli, Davide; Mapelli, Carlo; Omran, Mamdouh; Preiss, Stefan; Fabritius, Timo (2021-11-10)
Abdelrahim, A., Aula, M., Iljana, M., Willms, T., Echterhof, T., Steinlechner, S., Mombelli, D., Mapelli, C., Omran, M., Preiss, S. and Fabritius, T. (2022), Suitability of Self-Reducing and Slag-Forming Briquettes for Electric Arc Furnace Use Based on Laboratory Tests. steel research int., 93: 2100472. https://doi.org/10.1002/srin.202100472
© 2021 Wiley-VCH GmbH. This is the peer reviewed version of the following article: Abdelrahim, A., Aula, M., Iljana, M., Willms, T., Echterhof, T., Steinlechner, S., Mombelli, D., Mapelli, C., Omran, M., Preiss, S. and Fabritius, T. (2022), Suitability of Self-Reducing and Slag-Forming Briquettes for Electric Arc Furnace Use Based on Laboratory Tests. steel research int., 93: 2100472, which has been published in final form at https://doi.org/10.1002/srin.202100472. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
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https://urn.fi/URN:NBN:fi-fe202201199474
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Abstract
The in-plant recycling routes of side streams produced in electric arc furnace (EAF) steelmaking remain underexplored. Briquetting is an attractive technique to enable their recycle. Briquettes introduced into EAF must possess certain mechanical and chemical properties. However, no standard is available to determine the suitability of briquettes used in the EAF process. Herein, eight side streams are characterized, and used to produce seven different briquettes to be used in EAF. Briquettes tested consist of four self-reducing briquettes and three slag-forming briquettes produced using different recipes. The briquettes are subjected to several mechanical and thermal tests which reflect their intended use in EAF. The mechanical tests include compression and drop tests, and the thermal tests include optical dilatometry, thermogravimetric analysis (TGA)–derivative thermogravimetry (DTG)–mass spectrometry (MS), and full-scale briquette reduction tests. Moreover, melting trials are performed to assess the melting behavior of selected briquettes and their interaction with slag. Suitability of briquettes characteristics is assessed based on values from the literature and against reference ferroalloys and lime stones used in one of the steel plants. Two briquettes are deemed suitable for EAF use, while three briquettes are deemed unsuitable, and two briquettes are considered of limited use.
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