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Abstract

In order to clarify the action law of the swirl oxygen lance jet on the melt pool of the converter and to determine the optimal swirl angle of the swirl oxygen lance for the 120t converter, this study establishes the gas-liquid two-phase flow model of the oxygen lance with different swirl angles based on the realizable k-ε model and the VOF multiphase flow model. The gas-liquid interface behavior during the interaction between the jet and the molten pool was analyzed, and the flow pattern of molten steel in the molten pool was mainly investigated. The results show that compared with traditional oxygen lance, the rotating oxygen lance jet enhances the stirring of the melt pool and intensifies the fluctuation of the melt pool liquid level. The depth of the impact cavity decreases with the increase of the swirl angle, but the diameter of the impact cavity increases with the increase of the swirl angle. When the jet with a swirl angle of 10 ° impacts the surface of the melt pool, the turbulence energy obtained by the molten steel is the highest, the average flow velocity inside the melt pool is the highest, and the molten steel is stirred more thoroughly, achieving better melting effects.
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Authors and Affiliations

Haoran Ma
1
Guangqiang Liu
2
Chengcheng Xu
3
Kun Liu
1
ORCID: ORCID
Peng Han
1

  1. College of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 3114051, China
  2. College of Civil Engineering, University of Science and Technology Liaoning, Anshan 114051, China
  3. Cold rolling mill plant, ANGANG Steel Company Limited, Anshan 114021, China

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