New idea of suppressing free surface vortex during tapping liquid steel from converter

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• 作者：Seung-Jin Lee ; Sang-Joon Kim ; Hae-Geon Lee
• 关键词：computer simulation ; liquids ; purification ; vortex ; dual tapping hole
• 刊名：Metals and Materials International
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：22
• 期：1
• 页码：136-142
• 全文大小：494 KB
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• 作者单位：Seung-Jin Lee (1) (2)
  Sang-Joon Kim (1)
  Hae-Geon Lee (1) (3)
  
  1. Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang, Rep. of Korea
  2. Engineering Solution Center, POSCO, Pohang, Rep. of Korea
  3. School of Engineering, Adama Science and Technology University, Adama, Ethiopia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Metallic Materials
  Operating Procedures and Materials Treatment
  
• 出版者：The Korean Institute of Metals and Materials, co-published with Springer Netherlands
• ISSN：2005-4149

文摘

During tapping liquid steel from a converter to a ladle, slag may carry over due to a formation of free surface vortex. Such vortex should be suppressed in order to minimize contamination of the steel by slag. In the present study, a new idea is proposed to minimize the vortex formation by applying dual tapping hole system. The idea was tested using a rectangular shape water vessel with dual tapping holes, supplemented by a numerical simulations, in order to evaluate feasibility of the dual tapping hole system. Both the water model experiment and the numerical simulation showed similar tendencies that the dual tapping hole system is promising to prevent the vortex formation. Experimental results showed that the free surface vortex formation is highly sensitive to shape and configuration of the nozzle. From the numerical simulation, flow characteristics were obtained, and vortex canceling between two nozzles is confirmed. Effect of dual tapping hole increased with increasing distance between two holes in the present experimental condition. Finally, a 1/7.8 scale-down water vessel simulating a real converter was employed in order to confirm the validity of the above findings. The result showed almost the same tendencies with the previous findings. Keywords computer simulation liquids purification vortex dual tapping hole