Intensification of Bubble Disintegration and Dispersion by Mechanical Stirring in Gas Injection Refining
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- Liu Yan
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University
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- Sano Masamichi
- Nagoya University
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- Zhang TingAn
- School of Materials and Metallurgy, Northeastern University
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- Wang Qiang
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University
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- He JiCheng
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University
Bibliographic Information
- Other Title
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- ガス吹込み精錬における機械攪拌を利用した気泡の微細化と分散強化
- ガス フキコミ セイレン ニ オケル キカイ カクハン オ リヨウ シタ キホウ ノ ビサイカ ト ブンサン キョウカ
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Description
Water model experiments were performed for developing highly efficient gas injection refining processes. Mechanical stirring was applied to disintegrate the injected bubbles and to disperse them widely in the bath. The bubble disintegration and dispersion were investigated by changing rotation mode (direction of rotation), rotation speed and blade size of the impeller, and gas flow rate. Forward rotation of the impeller induced a stable tangential flow and could not disperse bubbles in the bath due to formation of a vortex around the impeller shaft. The tangential flow was suppressed by forward-interrupt rotation, which could reduce the vortex formation to some degree. However, the forward-interrupt rotation could not disperse the bubbles widely in the bath. Forward–reverse rotation could prevent the vortex formation completely and create a turbulent and strong shear stress field, which intensified the bubble disintegration and dispersion in the bath. Higher impeller rotation speed and larger blade length in the forward–reverse rotation could enhance the bubble disintegration more intensely, and make the dispersed bubbles smaller and the bubble dispersion zone wider. The bubble size tended to be larger at higher gas flow rates. However, its dependence on the gas flow rate became smaller at higher impeller rotation speed.
Journal
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- Tetsu-to-Hagane
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Tetsu-to-Hagane 96 (2), 57-63, 2010
The Iron and Steel Institute of Japan
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Details 詳細情報について
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- CRID
- 1390001205125792384
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- NII Article ID
- 130000262795
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- NII Book ID
- AN10528571
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- ISSN
- 1341688X
- 18832954
- 00211575
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- NDL BIB ID
- 10546359
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed