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Influence of ladle slag additions on BOF process performance
Royal Institute of Technology (KTH).
Royal Institute of Technology (KTH).
RISE, Swerea, Swerea MEFOS.
Royal Institute of Technology (KTH).
2012 (English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812, Vol. 39, no 5, 378-385 p.Article in journal (Refereed)
Abstract [en]

plant trial has been performed, with recycling of ladle slag to the LD converter at SSAB EMEA, Luleå, Sweden. The effect of ladle slag addition on the slag and steel composition, together with the slag weight, was investigated with sampling both during the blow and at blow end. The addition of ladle slag resulted in an increase in slag weight between 1 and 2 t throughout the blow and an increase of 3 wt-% in the slag Al 2O 3 content. This indicated that the ladle slag melted during the initial stages of the blow and enhanced the early slag formation. Lime additions were reduced with 3·5 kg t -1 liquid steel without drawbacks on the phosphorus or sulphur refining. Heats with added ladle slag had an increase in blowing time with ~4% and an increased tendency for slopping. However, this can be handled by different lance and addition programmes. © 2012 Institute of Materials, Minerals and Mining.

Place, publisher, year, edition, pages
2012. Vol. 39, no 5, 378-385 p.
Keyword [en]
Ladle slag, LD converter, Recycling, Slag formation
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-12673DOI: 10.1179/1743281211Y.0000000021Scopus ID: 2-s2.0-84861973611OAI: oai:DiVA.org:ri-12673DiVA: diva2:972865
Available from: 2016-09-22 Created: 2016-09-22Bibliographically approved

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