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Coupling of a fundamental mathematical fluid flow model with computational thermodynamics model to study the decarburisation
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. , 28 p.
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-96621ISBN: 978-91-7501-418-0 (print)OAI: oai:DiVA.org:kth-96621DiVA: diva2:531479
Public defence
2012-06-15, Sal B1, Brinellvägen 23, KTH, Stockholm, 12:00 (English)
Opponent
Supervisors
Note
QC 20120607Available from: 2012-06-07 Created: 2012-06-07 Last updated: 2012-07-23Bibliographically approved
List of papers
1. A fundamental decarburization model of the AOD process
Open this publication in new window or tab >>A fundamental decarburization model of the AOD process
(English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812Article in journal (Other academic) Submitted
Keyword
AOD, CFD, thermodynamics, fundamental model, industrial converter
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-99276 (URN)
Note

QS 2012

Available from: 2012-07-23 Created: 2012-07-23 Last updated: 2017-12-07Bibliographically approved
2. An in-Depth Model-Based Analysis of Decarburization in the AOD Process
Open this publication in new window or tab >>An in-Depth Model-Based Analysis of Decarburization in the AOD Process
2012 (English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 83, no 11, 1039-1052 p.Article in journal (Refereed) Published
Abstract [en]

A previously reported flow and reaction model for an argon-oxygen decarburization converter was extended to also include a thermodynamic description. An in-depth study of the model results has been conducted to answer how concentrations of elements and species in the converter at different locations change with time. This may contribute to the understanding of the mechanisms of the refining procedure in the argon-oxygen decarburization process. The refining procedure includes several step-wise changes of an injected gas composition to higher and higher inert gas ratio, called step changes. A step change leads to a decreased partial pressure of carbon monoxide and maintains the decarburization at a higher efficiency. The results shows early and late concentration profiles for the first injection step and suggests a way to determine when a step change should be made. Moreover, the step change could be determined by calculating the carbon concentration profiles and deciding when the carbon concentration gradients start to diminish.

Keyword
AOD, decarburization, modeling, fluid flow, thermodynamics
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-99278 (URN)10.1002/srin.201200066 (DOI)000310600100006 ()2-s2.0-84868365981 (Scopus ID)
Note

QC 20121207. Updated from submitted to published.

Available from: 2012-07-23 Created: 2012-07-23 Last updated: 2017-12-07Bibliographically approved
3. Investigating the effect of slag on decarburization in an AOD coverter using a fundamental model
Open this publication in new window or tab >>Investigating the effect of slag on decarburization in an AOD coverter using a fundamental model
(English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344XArticle in journal (Other academic) Submitted
Keyword
AOD, modeling, fluid flow, decarburization, chromium oxide separation
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-99279 (URN)
Note

QC 2012

Available from: 2012-07-23 Created: 2012-07-23 Last updated: 2017-12-07Bibliographically approved
4. Preliminary investigation of temperatur dependencies on decarburization in a fundamental AOD model
Open this publication in new window or tab >>Preliminary investigation of temperatur dependencies on decarburization in a fundamental AOD model
(English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812Article in journal (Other academic) Submitted
Keyword
AOD, modeling, fluid flow, decarburization, temperature
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-99281 (URN)
Note

QS 2012

Available from: 2012-07-23 Created: 2012-07-23 Last updated: 2017-12-07Bibliographically approved

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