东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (5): 633-637.DOI: 10.12068/j.issn.1005-3026.2018.05.006

• 材料与冶金 • 上一篇    下一篇

电磁搅拌钢包内气泡聚并破裂行为

勾大钊1,2， 雷洪1,2， 耿佃桥1,2   

  1. (1. 东北大学 材料电磁过程研究教育部重点实验室， 辽宁 沈阳110819; 2. 东北大学 冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2017-04-17 修回日期:2017-04-17 出版日期:2018-05-15 发布日期:2018-05-25
  • 通讯作者: 勾大钊
  • 作者简介:勾大钊(1992-)，男，湖北宜昌人，东北大学博士研究生; 雷洪(1973-)，男，湖北武汉人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金委员会－宝钢集团有限公司钢铁联合研究基金资助项目(U1460108); 国家自然科学基金资助项目(51304038); 中国博士后基金特别资助项目(2015T80261).

Bubble Breakup and Coalescence in Electromagnetic Stirring Ladle

GOU Da-zhao1,2， LEI Hong1,2， GENG Dian-qiao1,2   

  1. 1. Key Laboratory of Electromagnetic Processing of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China; 2. School of Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2017-04-17 Revised:2017-04-17 Online:2018-05-15 Published:2018-05-25
  • Contact: LEI Hong
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摘要： 结合气液两相流欧拉模型与考虑气泡破碎聚并的颗粒群平衡模型，研究了电磁搅拌下底吹钢包内流场分布及气泡尺寸分布.结果表明:搅拌器向上搅拌时钢包内形成一个大循环流场，而向下搅拌时钢包内形成了一个大的回流区和一个小的回流区.钢包内气泡分布为气液两相区中心区域气泡直径最大，气液两相区边界处直径较小，且从气液两相区中心到气液边界气泡直径逐渐减小.电流越大，气液两相区域在垂直方向上偏转程度越大，而且电流越大，气液两相区中心大气泡分布区域也越大.电磁搅拌器向下搅拌时气液两相中心区域大气泡直径分布区域小于向上搅拌.大气泡偏转程度小于小气泡，大气泡偏向钢包中心轴线一侧.

关键词: 电磁搅拌, 钢包, 气泡, 聚并破碎, 颗粒群平衡模型

Abstract: A mathematical model for the gas-liquid flow field in the ladle with argon blowing and electromagnetic stirring was developed based on the Euler model and population balance model(PBM). The results show that the upward stirring only forms a large circulation flow field in the ladle， while the downward stirring forms a large and a small circulation flow fields. The size of the bubble in the center of gas-liquid region is the largest and is gradually reduced when the bubble is changed from the center to the boundary of the gas-liquid two-phase region. With increasing electromagnetic stirring current， the deflection degree in vertical direction in gas-liquid two-phase region is greater and the distribution of large-sized bubble area in the center of the gas-liquid two-phase region becomes wider. The area of large-sized bubbles in the central region from the downward stirring is smaller than that from the upward stirring. The spatial distribution of large-sized bubbles has less effect on the deflection and bends to the center line of the ladle.

Key words: electromagnetic stirring, ladle, bubble, breakage and coalescence, population balance model

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