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Laser induced reduction of iron ore by silicon
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0002-3569-6795
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development. SWERIM AB, Box 7047, 164 07 Kista, Sweden.ORCID iD: 0000-0003-4443-3097
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development. Fraunhofer IWS, Winterbergstrasse 28, 01277 Dresden, Germany.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development. Laser Expertise Ltd., Nottingham, UK.
2023 (English)In: Journal of Alloys and Metallurgical Systems, ISSN 2949-9178, Vol. 4, article id 100039Article in journal (Refereed) Published
Abstract [en]

Iron ore powder accompanied by Si-powder as a reducing agent, was melted using a high-power laser beam. During laser melting of the two different powder beds placed next to each other, silicon merged and diffused into the iron ore, forming a ternary melt phase Fe-O-Si of around 30–60–10 at%. High speed imaging of the laser melting process as well as subsequent SEM-analysis of the generated nuggets showed the formation of droplets that merge with the surrounding Si- or ore-powder and form distinct domains. Under certain circumstances, the solidifying nuggets, of the order of 0.5–5 mm in size, generated numerous small domains, up to 25 µm, of high purity iron, 90 + at%, surrounded by a matrix of the above mentioned slag. Many of these Fe-domains were created in the vicinity of regions of high Si-content.

Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 4, article id 100039
Keywords [en]
Laser treatment, Reduction, Iron, Iron ore, Powder processing, Ore reduction, Silicon
National Category
Other Materials Engineering Metallurgy and Metallic Materials
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-102647DOI: 10.1016/j.jalmes.2023.100039OAI: oai:DiVA.org:ltu-102647DiVA, id: diva2:1813899
Funder
Swedish Energy Agency, 51021-1, P2022-00202
Note

Godkänd;2023;Nivå 0;2023-11-22 (joosat);

CC BY 4.0 License

Funder: EU ERDF Kolarctic CBC with Region Norrbotten, project I2P, (no. KO4012); LKAB

Available from: 2023-11-22 Created: 2023-11-22 Last updated: 2023-11-22Bibliographically approved

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Kaplan, Alexander F. H.Fedina, TatianaBrückner, FrankPowell, John

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