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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
Dalarna University, School of Technology and Business Studies, Materials Technology.ORCID iD: 0000-0001-6996-5001
Dalarna University, School of Technology and Business Studies, Materials Technology.
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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 Al killed low carbon steel has been evaluated. The coating materials have been tested in laboratory 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. The chemical composition was analysed by using an FEG-SEM equipped with EDS.The major result showed that alumina reacted with CaTiO3 in the temperature interval from 1550-1600°C. In addition, the clogging ratio showed a decreased clogging tendency for coated nozzles compared to standard nozzles. Also, the results showed that an approximately three times higher steel mass could be teemed through the coated nozzles before clogging occurred compared to trials with uncoated standard nozzles. Overall, it is concluded that plasma sprayed CaTiO3 coatings can reduce the clogging tendency during the continuous casting process.

Place, publisher, year, edition, pages
Maney Publishing, 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
Steel Forming and Surface Engineering, Studier angående bildningsmekanismer för igensättningar i gjutrör
URN: urn:nbn:se:du-21364DOI: 10.1179/1743281215Y.0000000065OAI: oai:DiVA.org:du-21364DiVA: diva2:919553
Förbättrad processteknik vid stränggjutning av stål speciellt känsliga för igensättning

Finansiering för färdigställande av artikel har erhållits från Stålindustrins forskarskola i sammarbete med SSAB i Oxelösund. 

Stålindustrins forskarskola: Huvudman och sammanhållande i arbetet är Högskolan Dalarna. Satsningen finansieras av Jernkontoret, Region Dalarna, Region Gävleborg, Länsstyrelsen Gävleborg, Högskolan Dalarna, Sandvikens kommun samt samverkande företag. Samarbeten har hittills etablerats med SSAB, Sandvik, Outokumpu, Böhler-Uddeholm, Åkers Sweden, Triple-Steelix och data M Scandinavia. Luleå Tekniska Universitet samt Högskolan i Gävle är viktiga akademipartners.

Available from: 2016-04-14 Created: 2016-04-14 Last updated: 2016-06-03Bibliographically approved

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