An investigation of slag floatation and entrapment in a continuous-casting tundish using fluid-flow simulations, sampling and physical metallurgy

Document identifier: oai:DiVA.org:ltu-7648
Access full text here:10.1034/j.1600-0692.2003.00533.x
Keyword: Natural Sciences, Physical Sciences, Other Physics Topics, Naturvetenskap, Fysik, Annan fysik
Publication year: 2003
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Abstract:

Some aspects of inclusion behaviour in the tundish have been investigated both theoretically and experimentally. Good agreement was obtained between measured and predicted temperature and flow fields for 1- to 6-strand continuous-casting tundishes. In this study the flow field was redesigned with weirs, resulting in the addition of a vertical component to Stoke's equation. The results indicate an increase in the velocity that cause a rise of inclusions (smaller inclusions ( < 20 mu m)). Consideration of slag, flux and refractory in the model has also made it possible to simulate the mixing of steel and slag. Special sampling techniques were used to gather information. Samples were analysed using ultrasonic testing, LOM, SEM and Atomic Force Microscopy (AFM). The analysis results were used to verify the predictions regarding steel/slag mixing and understanding of physical conditions at the interfaces. As a result, the casting praxis was improved (cleaner steel) and the products were of higher quality.

Authors

Henrik Solhed

Other publications >>

Lage Jonsson

Swerea MEFOS AB
Other publications >>

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    header: 
        identifier: oai:DiVA.org:ltu-7648
        datestamp: 2021-04-19T12:20:22Z
        setSpec: SwePub-ltu
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                version: 3.7
            recordInfo: 
                recordContentSource: ltu
                recordCreationDate: 2016-09-29
            identifier: 
                http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-7648
                10.1034/j.1600-0692.2003.00533.x
                60d2cf10-7004-11db-962b-000ea68e967b
            titleInfo: 
                @attributes: 
                    lang: eng
                title: An investigation of slag floatation and entrapment in a continuous-casting tundish using fluid-flow simulations sampling and physical metallurgy
            abstract: 
Some aspects of inclusion behaviour in the tundish have been investigated both theoretically and experimentally. Good agreement was obtained between measured and predicted temperature and flow fields for 1- to 6-strand continuous-casting tundishes. In this study the flow field was redesigned with weirs resulting in the addition of a vertical component to Stoke's equation. The results indicate an increase in the velocity that cause a rise of inclusions (smaller inclusions ( < 20 mu m)). Consideration of slag flux and refractory in the model has also made it possible to simulate the mixing of steel and slag. Special sampling techniques were used to gather information. Samples were analysed using ultrasonic testing LOM SEM and Atomic Force Microscopy (AFM). The analysis results were used to verify the predictions regarding steel/slag mixing and understanding of physical conditions at the interfaces. As a result the casting praxis was improved (cleaner steel) and the products were of higher quality.

            subject: 
                    @attributes: 
                        lang: eng
                        authority: uka.se
                    topic: 
                        Natural Sciences
                        Physical Sciences
                        Other Physics Topics
                    @attributes: 
                        lang: swe
                        authority: uka.se
                    topic: 
                        Naturvetenskap
                        Fysik
                        Annan fysik
                    @attributes: 
                        lang: swe
                        authority: ltu
                    topic: Fysik
                    genre: Research subject
                    @attributes: 
                        lang: eng
                        authority: ltu
                    topic: Fysik
                    genre: Research subject
            language: 
                languageTerm: eng
            genre: 
                publication/journal-article
                ref
            note: 
                Published
                2
                Validerad; 2003; 20061109 (ysko)
            name: 
                    @attributes: 
                        type: personal
                        authority: ltu
                    namePart: 
                        Solhed
                        Henrik
                    role: 
                        roleTerm: aut
                    nameIdentifier: solhed
                    @attributes: 
                        type: personal
                    namePart: 
                        Jonsson
                        Lage
                    role: 
                        roleTerm: aut
                    affiliation: Swerea MEFOS AB
            originInfo: 
                dateIssued: 2003
            relatedItem: 
                @attributes: 
                    type: host
                titleInfo: 
                    title: Scandinavian journal of metallurgy
                identifier: 
                    0371-0459
                    1600-0692
                part: 
                    detail: 
                            @attributes: 
                                type: volume
                            number: 32
                            @attributes: 
                                type: issue
                            number: 1
                    extent: 
                        start: 15
                        end: 32
            location: 
                url: http://ltu.diva-portal.org/smash/get/diva2:980538/FULLTEXT01.pdf
            accessCondition: gratis
            physicalDescription: 
                form: electronic
            typeOfResource: text