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A thermodynamic and kinetic model of reoxidation and desulphurisation in the ladle furnace
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.
2000 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 40, no 11, 1080-1088 p.Article in journal (Refereed) Published
Abstract [en]

A thermodynamic and kinetic model of reoxidation and desulphurisation in the ladle furnace has been developed by using a two-dimensional fluid-flow model combined with equations expressing the thermodynamics of reoxidation and desulphurisation. More specifically ladle vacuum treatment of a gas-stirred ladle has been simulated. In order to describe the activities of the oxide components of the slag, expressions by Ohta and Suito(1)) were adopted. The thermodynamic model describes the slag/metal equilibria between Al, Si, O, Mn and S in the molten steel and Al2O3, SiO2, FeO, MnO and S in the slag. A fluid dynamic model that considers the slag, steel and argon phases derives the kinetics. Results from an isothermal calculation have been heuristically compared with industrial plant data and they show good agreement. The model results have also revealed that the reduction of silica plays a part in aluminium loss during ladle treatment.

Place, publisher, year, edition, pages
2000. Vol. 40, no 11, 1080-1088 p.
Keyword [en]
ladle treatment, vacuum, reoxidation, desulphurisation, kinetics, thermodynamics, fluid flow, CFD, model simulation, gas-stirred ladle, slags
Identifiers
URN: urn:nbn:se:kth:diva-20164ISI: 000165352600005OAI: oai:DiVA.org:kth-20164DiVA: diva2:338857
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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