Model of gas flow through upper tundish nozzle refractory and initial bubble size

Rui Liu, Brian G. Thomas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Argon flowing through the porous upper tundish nozzle (UTN) refractory forms the gas bubbles which greatly impact the multiphase flow pattern in the SEN and caster, and on defect formation in the final product. Two separate computational models, (pressure-source and porous-flow), were developed and validated to study gas flow through heated UTN refractory including the thermal effects on gas expansion and permeability. A third model predicts the initial bubble size distribution. Simulations revealed an asymmetric gas distribution from the inner surface of a particular UTN design, which was confirmed with observations of a static physical water model. The models were then applied to predict the gas and bubble behavior during commercial caster operation with slide-gate flow control, including the effect of gas leakage.

Original languageEnglish (US)
Title of host publicationAISTech 2012 - Proceedings of the Iron and Steel Technology Conference and Exposition
Pages2235-2245
Number of pages11
StatePublished - 2012
EventAISTech 2012 Iron and Steel Technology Conference and Exposition - Atlanta, GA, United States
Duration: May 7 2012May 10 2012

Other

OtherAISTech 2012 Iron and Steel Technology Conference and Exposition
CountryUnited States
CityAtlanta, GA
Period5/7/125/10/12

Keywords

  • Argon gas
  • Gas leakage
  • Initial bubble size
  • Porous-flow model
  • Pressure-source mode
  • UTN refractory

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

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  • Cite this

    Liu, R., & Thomas, B. G. (2012). Model of gas flow through upper tundish nozzle refractory and initial bubble size. In AISTech 2012 - Proceedings of the Iron and Steel Technology Conference and Exposition (pp. 2235-2245)