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Mass transfer and slag-metal reaction in ladle refining: a CFD approach
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Micro-Modelling.
2009 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

 

In order to optimise the ladle treatment mass transfer modelling of aluminium addition and homogenisation time was carried out. It was stressed that incorporating slag-metal reactions into the mass transfer modelling strongly would enhance the reliability and amount of information to be analyzed from the CFD calculations.

 

In the present work, a thermodynamic model taking all the involved slag metal reactions into consideration was incorporated into a 2-D fluid flow model of an argon stirred ladle. Both thermodynamic constraints and mass balance were considered. The activities of the oxide components in the slag phase were described using the thermodynamic model by Björkvall and the liquid metal using the dilute solution model. Desulphurization was simulated using the sulphide capacity model developed by KTH group. A 2-D fluid flow model considering the slag, steel and argon phases was adopted.

 

The model predictions were compared with industrial data and the agreement was found quite satisfactory. The promising model calculation would encourage new CFD simulation of 3-D along this direction.

 

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology , 2009. , iii, 32 p.
Keyword [en]
reoxidation, desulphurisation, CFD, ladle treatment, model
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-11864ISBN: 978-91-7415-534-1 (print)OAI: oai:DiVA.org:kth-11864DiVA: diva2:286521
Presentation
2010-01-29, KTH, Brinellvägen 23, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20110414Available from: 2010-01-14 Created: 2010-01-14 Last updated: 2011-04-14Bibliographically approved
List of papers
1. Simulation of A1-addition in an inductive stirred ladle
Open this publication in new window or tab >>Simulation of A1-addition in an inductive stirred ladle
2004 (English)In: Proceedings of SCANMET II, 2nd International Conference on Process Development in Iron and Steelmaking, 2004, Vol. 1, 253-262 p.Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-11862 (URN)
Conference
SCANMET II, 2nd International Conference on Process Development in Iron and Steelmaking, 6-9 June 2004, Luleå, Sweden
Note
QC 20101102Available from: 2010-01-14 Created: 2010-01-14 Last updated: 2010-11-02Bibliographically approved
2. Study on desulphurization and reoxidation by coupled thermodynamic modelling and CFD simulation
Open this publication in new window or tab >>Study on desulphurization and reoxidation by coupled thermodynamic modelling and CFD simulation
2010 (English)In: Steel Grips - Journal of Steel and Related Materials, ISSN 1611-4442, E-ISSN 1866-8453, Vol. 8, 50-56 p.Article in journal (Refereed) Published
Abstract [en]

In the present work, a thermodynamic model taking into account all involved slag metal reactions was incorporated into a 2-dimensional fluid flow model of an argon stirred ladle. Both, the thermodynamic constraints and the mass balance were considered. The activities of the oxide components in the slag phase were described using the thermodynamic model by Björkvall, and the liquid metal using the dilute solution model. Desulphurization was simulated using the sulphide capacity model developed by KTH group. A 2-dimensional fluid flow model considering slag, steel and argon phases was adopted. The model predictions were compared with industrial data. The promising model calculation encourages new 3-dimensional CFD simulation.

Keyword
Reoxidation, desulphurisation, CFD, ladle treatment, model simulation, thermodynamics
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-11863 (URN)10.5161/steel/2010/g02318 (DOI)
Note
QC 20101102. Uppdaterad från Accepted till Published (20101102).Available from: 2010-01-14 Created: 2010-01-14 Last updated: 2017-12-12Bibliographically approved

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CiteExportLink to record
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Citation style
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  • Other locale
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Output format
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