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Application of a Unified Eulerian Model to Study the Inclusions Deposition at a Steel-Slag Interface in a Tundish
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing.ORCID iD: 0000-0001-7953-1127
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy. FOI, Swedish Defence Research Agency, Division of CBRN Defence and Security.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.ORCID iD: 0000-0003-1919-9964
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(English)Manuscript (preprint) (Other academic)
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-168399OAI: oai:DiVA.org:kth-168399DiVA: diva2:816220
Note

QS 2015

Available from: 2015-06-02 Created: 2015-06-02 Last updated: 2015-06-15Bibliographically approved
In thesis
1. Some Aspects on Macroscopic Mixing in a Tundish
Open this publication in new window or tab >>Some Aspects on Macroscopic Mixing in a Tundish
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Two aspects on macroscopic mixing in a continuous flow system – metallurgical tundish were studied. Specifically, 1) the first focus was on salt solution tracer mixing, which is important for tundish design from perspectives of tracer technology and Residence Time Distributions (RTD) as well as for the understanding of the macroscopic mixing in tundishes. The different amounts of salt solution tracer mixing in a tundish were studied by using both physical models and mathematical models. The disturbance of KCl salt tracer on the flow in the tundish with respect to different amounts is like the “butterfly effect”, i.e. only a slight increase of the amount of tracer, the flow field might be disturbed. This, in turn, will result in a shifted RTD curve. 2) The second focus was on Eulerian modeling of inclusions macroscopic transport and removal, which is important for tundish design from perspectives of inclusions removal and to provide information of macroscopic removal of inclusions. In the study, an approach that combined the meso-scale inclusions deposition at turbulent boundary layers of steel-slag interface and the macroscopic transport of inclusions in the tundish was used. The theoretical calculation results showed that the effect of the roughness on the deposition velocity of small inclusions (radius of 1 μm) were more pronounced than that for the big inclusions (up to the radius of 9 μm). The dynamic inclusions removal studies showed that the tundish with a weir and a dam exhibited a better performance with respect to the removal of bigger inclusions (radii of 5 μm, 7 μm and 9 μm) than that of the case without weirs and dams. However, the tundish without weirs and dams showed a higher removal ratio of smaller inclusions (radius of 1 μm).

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2015. x, 24 p.
Keyword
continuous reactor, tundish, tracer, macroscopic mixing, water model, CFD, turbulence models, inclusions removal, inclusions deposition, dynamic removal
National Category
Metallurgy and Metallic Materials
Research subject
Materials Science and Engineering
Identifiers
urn:nbn:se:kth:diva-168402 (URN)978-91-7595-632-9 (ISBN)
Public defence
2015-08-28, B2, Brinellvägen 23, KTH, Stockholm, 10:00 (English)
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Supervisors
Note

QC 20150615

Available from: 2015-06-15 Created: 2015-06-02 Last updated: 2015-06-15Bibliographically approved

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Chen, Chao

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