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Studies of the decarburisation phenomena duringpreheating of submerged entry nozzles (SEN) incontinuous casting processes
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy. Dalarna University, Falun, Sweden.ORCID iD: 0000-0001-6996-5001
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy. Dalarna University, Falun, Sweden.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
2016 (English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812Article in journal (Refereed) Epub ahead of print
Abstract [en]

Decarburisation of the submerged entry nozzles (SEN) during the preheating process wasinvestigated based on plant trials and thermodynamic modelling at three different steel plants.During the trials the preheating processes were mapped, the temperature profiles wereregistered and post-mortem studies of the SENs with scanning electron microscopy wereperformed. Typically, the glass/silicon powder will form a dense and protective layer inside theSEN when heated over 1100°C. However, this study found that the temperature distributioninside the SEN did not always reach this critical temperature. Thus, decarburisation of the SENwas found at all steel plants. The overall results illustrate that the control of the preheatingprocess needs to be improved at all steel plants. It is suggested that future research should befocused on the development of new coating materials to prevent decarburisation of therefractory base material, which would decrease the chances of clogging during casting.

Place, publisher, year, edition, pages
Taylor & Francis Group, 2016.
Keyword [en]
Continuous casting, Industrial plant trials, Preheating, Decarburisation, Submerged entry nozzle
National Category
Metallurgy and Metallic Materials
Research subject
Materials Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-185229DOI: 10.1080/03019233.2016.1156900OAI: oai:DiVA.org:kth-185229DiVA: diva2:919527
Projects
Förbättrad processteknik vid stränggjutning av stål speciellt känsliga för igensättning
Funder
VINNOVA, TO2352 JK
Note

QCR 20160531

Available from: 2016-04-14 Created: 2016-04-14 Last updated: 2016-05-31Bibliographically approved

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The full text will be freely available from 2017-03-20 10:52
Available from 2017-03-20 10:52

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Svensson, JennieBrabie, VoicuJönsson, Pär
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