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Enhancement in Bath Mixing and Plume area in a New Degassing Process - A Computational Fluid Dynamic Study

Mondal, MK and Maruoka, N and Kitamura, S and Gupta, GS (2010) Enhancement in Bath Mixing and Plume area in a New Degassing Process - A Computational Fluid Dynamic Study. In: Archives of Metallurgy and Materials, 55 (4). pp. 1131-1135.

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Abstract

Reaction between the various species in slag and metal phase is usually mass transfer controlled. There have been continuous efforts to increase the reaction efficiency in slag-metal system, especially during decarburization of steel to produce the ultra low carbon steel (ULCS) in secondary steelmaking. It has been found that the surface reaction is a dominant factor in the final stage of decarburization. In the initial stage, the inner site reaction is major factor in the refining process. The mixing of bath affects the later reaction. However, the former reaction (surface reaction) is affected by the plume size area at the top of the metal surface. Therefore, a computational study has been made to understand the fluid dynamics of a new secondary steelmaking process called Revolutionary Degasser Activator (REDA) to study the bath mixing and plume area. REDA process has been considered as it is claimed that this process can reduce the carbon content in steel below 10ppm in a less time than the other existing processes such as RH and Tank degasser. This study shows that both bath mixing and plume area are increased in REDA process facilitating it to give the desired carbon content in less time. Qualitative comments are made on slag-metal reaction system based on this finding.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Polish Acad Sciences Committee Metallurgy.
Keywords: REDA;decarburization;CFD;ultra low carbon steel
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 06 Apr 2011 11:57
Last Modified: 06 Apr 2011 11:57
URI: http://eprints.iisc.ernet.in/id/eprint/36383

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