University of Oulu

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

Suitability of self-reducing and slag-forming briquettes for electric arc furnace use based on laboratory tests

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Author: Abdelrahim, Ahmed1; Aula, Matti1; Iljana, Mikko1;
Organizations: 1Process Metallurgy Research Unit, University of Oulu, Pentti Kaiteran katu 1, 90014 Oulu, Finland
2Department for Industrial Furnaces and Heat Engineering, RWTH Aachen University, Kopernikusstr. 10, 52074 Aachen, Germany
3Chair of Nonferrous Metallurgy, Montanuniversitaet Leoben, Franz-Josef-Str. 18, 8700 Leoben, Austria
4Dipartimento di Meccanica, Politecnico di Milano, Via La Masa 1, 20156 Milano, Italy
5MFG Metall- und Ferrolegierungsgesellschaft mbH Hafner, Blondin & Tidou, Rudolf-Diesel-Str. 9, 40670 Meerbusch, Germany
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe202201199474
Language: English
Published: John Wiley & Sons, 2022
Publish Date: 2022-11-10
Description:

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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Series: Steel research international
ISSN: 1611-3683
ISSN-E: 1869-344X
ISSN-L: 1611-3683
Volume: 93
Issue: 2
Article number: 2100472
DOI: 10.1002/srin.202100472
OADOI: https://oadoi.org/10.1002/srin.202100472
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
Subjects:
EAF
Funding: This research is part of the Fines2EAF project and received funding from the Research Fund for Coal and Steel (RFCS) of the European Community with Grant Agreement No. 754197. Chemical and mineralogical characterizations were performed with the support of the Centre for Material Analysis, University of Oulu, Finland. The authors would like to acknowledge the technical assistance of Mr. Tommi Kokkonen from the Process Metallurgy research unit at the University of Oulu. The authors would also like to acknowledge the financial support from the Finnish Cultural Foundation (grant number: 60212342/2021), Olvi Foundation, and Walter Ahlström foundation.
Copyright information: © 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.