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 (2): 195-199.DOI: 10.12068/j.issn.1005-3026.2018.02.010

• 材料与冶金 • 上一篇    下一篇

吹氩钢包内气泡聚并破碎和运动行为

勾大钊1,2， 王伟先2,3， 耿佃桥1,2， 雷洪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; 3. 东北特钢集团 北满特殊钢有限责任公司， 黑龙江 齐齐哈尔161041)
  • 收稿日期:2016-09-26 修回日期:2016-09-26 出版日期:2018-02-15 发布日期:2018-02-09
  • 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:
    国家自然科学基金与宝钢集团有限公司联合资助项目(U1460108)；国家自然科学基金资助项目(51304038).

Bubble Coalescence/Breakage and Movement in the Ladle with Argon Blowing

GOU Da-zhao1,2， WANG Wei-xian2,3， GENG Dian-qiao1,2， LEI Hong1,2   

  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; 3. Beiman Special Steel Company Limited， Dongbei Special Steel Group， Qiqihar 161041， China.
  • Received:2016-09-26 Revised:2016-09-26 Online:2018-02-15 Published:2018-02-09
  • Contact: LEI Hong
  • About author:-
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摘要： 基于Euler-Euler双流体模型及PBM模型，建立了吹氩钢包流场数学模型.此模型考虑了吹氩钢包内气液两相之间的曳力、升力、湍流扩散力和气泡的聚并和破碎等因素.研究了气泡聚并破碎对钢包钢液内含气率、气泡速度和混匀时间的影响，并与定气泡直径下的流场进行对比.数值结果表明:PBM模型的预测值更接近实验结果;钢包内气泡分布为中心区域气泡直径大，从中心到气液边界处气泡直径逐渐减小，气液两相区边界处直径最小;在钢包轴线上气泡速度先急剧增加然后缓慢减小，在接近液面处气泡速度又急剧减小.

关键词: 钢包, 气泡, 聚并破碎, Luo模型, 群体平衡模型(PBM)

Abstract: A mathematical model for the gas-liquid flow field in the ladle with argon blowing was built based on the Euler-Euler model and population balance model(PBM)， which considered the effects of the drag force， lift force， turbulent dispersion force and bubble coalescence and breakage in ladle with argon blowing. The effects of bubble coalescence and breakage on the gas holdup， bubble velocity and mixing time were investigated and further compared with those from the constant diameter model. The numerical results show that the predicted data of the PBM agrees well with the experimental one. The bubble diameter is the largest one in center area and reduces gradually from the center to the gas-liquid interface， therefore it becomes the smallest one at gas-liquid interface in the ladle. At the ladle central axis， the bubble velocity firstly increases drastically and then decreases gradually， however， it decreases greatly near the free surface.

Key words: ladle, bubble, coalescence and breakage, Luo model, PBM

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