Flow Characterization and Inclusions Removal in a Slab Tundish Equipped with Bottom Argon Gas Feeding

The fluid dynamics of a straight tundish was studied when Ar-gas was fed through the bottom, using mathematical simulation. Flow rates of 15 and 40 liters/min of argon in three locations into the tundish – near input steel, center, and near output steel – were analyzed. A stochastic model was employ...

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Bibliographic Details
Published in:Metallurgist (New York) 2018-03, Vol.61 (11-12), p.1055-1066
Main Authors: Aguilar-Rodriguez, C. E., Ramos-Banderas, J. A., Torres-Alonso, E., Solorio-Diaz, G., Hernández-Bocanegra, C. A.
Format: Article
Language:English
Subjects:
Aluminum oxide
Argon
Characterization and Evaluation of Materials
Chemistry and Materials Science
Computational fluid dynamics
Computer simulation
Materials Science
Metallic Materials
Nonmetallic inclusions
Residence time distribution
Tundishes
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Summary:The fluid dynamics of a straight tundish was studied when Ar-gas was fed through the bottom, using mathematical simulation. Flow rates of 15 and 40 liters/min of argon in three locations into the tundish – near input steel, center, and near output steel – were analyzed. A stochastic model was employed for determining statistically the particle amount (emulating alumina particles) in the inclusions removal. From these calculations and those of the Residence Time Distribution (RTD) curves, we found a direct relationship to improve steel quality. Specifically, removal of the smaller nonmetallic inclusions was significantly enhanced for cases with the lowest dead volume fraction; they correspond to those of the highest averaged residence time. Therefore, it was found that it is even possible to reduce argon consumption and still obtain good results of steel cleanness.
ISSN:0026-0894
1573-8892
DOI:10.1007/s11015-018-0607-0