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Investigation of iron losses during desulphurisation of hot metal utilising nepheline syenite
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Swerea MEFOS AB.
SSAB EMEA, Luleå.
Swerea MEFOS AB.
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2013 (English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812, Vol. 40, no 6, p. 436-442Article in journal (Refereed) Published
Abstract [en]

Iron losses during calcium carbide based hot metal desulphurisation have been studied via large scale investigations of slag from the slag pit as well as slag sampling during desulphurisation at SSAB EMEA in Lulea. The desulphurisation slag, after injection of calcium carbide, is normally solid and contains large amounts of iron. An alkali containing mineral, nepheline syenite, was mixed together with the calcium carbide to form a more fluid slag as the iron losses originate from enclosed metal droplets in the slag as well as drawn off hot metal during slag skimming. The slag amount after slag skimming decreased from 28.1 to 25.1 kg t(-1) hot metal with addition of 5 wt-% nepheline syenite to the calcium carbide, and the magnetic fraction of the slag from the slag pit decreased from 2.5 to 1.9%. Finally, no negative effect on the reagent efficiency was observed during the trials with addition of nepheline syenite.

Place, publisher, year, edition, pages
2013. Vol. 40, no 6, p. 436-442
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-5229DOI: 10.1179/1743281212Y.0000000067ISI: 000322793600006Scopus ID: 2-s2.0-84883287249Local ID: 3454daeb-edd3-46f2-a8dc-3e95c933a00cOAI: oai:DiVA.org:ltu-5229DiVA, id: diva2:978103
Note
Validerad; 2013; 20130905 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Magnelöv, MarianneBjörkman, Bo

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