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Studies of new coating materials to prevent clogging of the submerged entry nozzle (SEN) during continuous casting of Al-killed low carbon steels
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy. Högskolan Dalarna.ORCID iD: 0000-0001-6996-5001
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics. Högskolan Dalarna.
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2016 (English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812Article in journal (Refereed) Epub ahead of print
Abstract [en]

The possibility to reduce clogging in the submerged entry nozzle (SEN) when casting Alkilledlow carbon steel has been evaluated. The coating materials have been tested inlaboratory trials and pilot plant trials. Totally, 2 mixes of the coating material has been tested;containing 4.8 and 9.1 % CaTiO3 mixed with yttria stabilised zirconia (YSZ) powder. Thechemical composition was analysed by using an FEG-SEM equipped with EDS.The major result showed that alumina reacted with CaTiO3 in the temperature interval from1550-1600°C. In addition, the clogging ratio showed a decreased clogging tendency forcoated nozzles compared to standard nozzles. Also, the results showed that an approximatelythree times higher steel mass could be teemed through the coated nozzles before cloggingoccurred compared to trials with uncoated standard nozzles. Overall, it is concluded thatplasma sprayed CaTiO3 coatings can reduce the clogging tendency during the continuouscasting process.

Place, publisher, year, edition, pages
Taylor & Francis, 2016.
Keyword [en]
Clogging; Submerged entry nozzle; Pilot plant trials; Al-killed steel; Calcium titanate; Coating; Plasma spraying
National Category
Metallurgy and Metallic Materials
Research subject
Materials Science and Engineering
URN: urn:nbn:se:kth:diva-185230DOI: 10.1179/1743281215Y.0000000065OAI: diva2:919538
Förbättrad processteknik vid stränggjutning av stål speciellt känsliga för igensättning

QCR 20160531

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

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Svensson, JennieBrabie, VoicuJönsson, Pär
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