Novel Modeling Concept for Vacuum Tank Degassing
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.
V. Thapliyal et al., "Novel Modeling Concept for Vacuum Tank Degassing," Proceedings of the 2012 AISTech, The Iron & Steel Technology Conference and Exposition (2012, Atlanta, GA), pp. 1143-1150, Association for Iron & Steel Technology (AIST), May 2012.
2012 AISTech, The Iron & Steel Technology Conference and Exposition (2012: May 7-10, Atlanta, GA)
Materials Science and Engineering
Keywords and Phrases
Vacuum Tank Degassing; Steel; Modeling
Article - Conference proceedings
© 2012 Association for Iron & Steel Technology (AIST), All rights reserved.
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