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Numerical and Physical Simulations of a Combined Top‐Bottom‐Side Blown Converter
Author(s) -
Zhou Xiaobin,
Ersson Mikael,
Zhong Liangcai,
Jönsson Pär G.
Publication year - 2015
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201400376
Subject(s) - tuyere , mechanics , shear stress , mixing (physics) , wake , stress (linguistics) , materials science , turbulence , oscillation (cell signaling) , jet (fluid) , structural engineering , engineering , metallurgy , chemistry , physics , quantum mechanics , blast furnace , linguistics , philosophy , biochemistry
In this study, a side tuyere was introduced to investigate how it is possible to lower the mixing time and to avoid problems of a reduced stirring when using the application of slag splashing process in the combined top and bottom blown converter. Both physical and mathematical models were applied to study the flow in the bath. Specifically, the effects of a side‐blowing gas jet on the bath stirring intensity was studied. The results indicate that the mixing time for a side blown converter is decreased profoundly compared to a conventional combined top and bottom blown converter. Overall, the mathematical model showed similar trends and a good agreement with that of the physical modeling data. Furthermore, the shear stress at the wall in the top‐bottom‐side (TBS) converter was considered, since the furnace lining is important when side blowing is used in the converter. It was found that the side wall shear stress is increased by introducing side blowing, especially in the region near the side blowing plume. Three side tuyeres with different locations in the same level did not show any obvious effects on the mixing of the bath, but showed apparent differences in the shear stress and the oscillation of the bath. Overall, the results showed that the mathematical model can be used to design the configuration of the metallurgical vessels when it is necessary to consider the oscillation and the shear stress of the bath.