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Investigation of iron losses during desulphurisation of hot metal utilising nepheline syenite
RISE, Swerea, Swerea MEFOS.
RISE, Swerea, Swerea MEFOS.
SSAB EMEA AB.
RISE, Swerea, Swerea MEFOS.
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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)
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 Luleå. 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-21 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. © 2013 Institute of Materials, Minerals and Mining.

Place, publisher, year, edition, pages
2013. Vol. 40, no 6, p. 436-442
Keywords [en]
Calcium carbide, Desulphurisation, Hot metal, Iron losses, Nepheline syenite, Reagent efficiency
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-12663DOI: 10.1179/1743281212Y.0000000067Scopus ID: 2-s2.0-84883287249OAI: oai:DiVA.org:ri-12663DiVA, id: diva2:972855
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2017-11-21Bibliographically approved

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