Title

Novel Modeling Concept for Vacuum Tank Degassing

Abstract

Vacuum Tank Degassing (VTD) is widely used as a secondary steelmaking process to achieve very low concentrations of nitrogen, hydrogen, carbon, sulphur, and other elements in steel. In the present study, a dynamic model for the VTD has been developed. Fluent CFD software was used to calculate the flow and recirculation rates, which vary over time depending on the rate of CO evolution in the melt and the argon flow rate. These have then been combined in process simulator software (METSIM) to build a dynamic model which incorporates all the kinetic aspects of the process. The steel melt was divided into different zones, at different pressures, with mixing represented by flow between the zones. This model includes reactions at the slag-metal interface, argon bubble-metal interface and in the liquid metal due to the reduced pressure while maintaining the circulation of liquid metal in the VTD.

Meeting Name

2012 AISTech, The Iron & Steel Technology Conference and Exposition (2012: May 7-10, Atlanta, GA)

Department(s)

Materials Science and Engineering

Keywords and Phrases

Vacuum Tank Degassing; Steel; Modeling

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2012 Association for Iron & Steel Technology (AIST), All rights reserved.

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