东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (2): 232-237.DOI: 10.12068/j.issn.1005-3026.2015.02.017

• 材料与冶金 • 上一篇    下一篇

电磁制动对CSP结晶器内流动和传热的影响

张晓峰1,2， 张路莎1,2， 王宝1,2， 刘青1,2   

  1. (1.北京科技大学 钢铁冶金新技术国家重点实验室， 北京100083； 2.北京科技大学 冶金与生态工程学院， 北京100083)
  • 收稿日期:2013-12-12 修回日期:2013-12-12 出版日期:2015-02-15 发布日期:2014-11-07
  • 通讯作者: 张晓峰
  • 作者简介:张晓峰(1985-)，男，安徽亳州人，北京科技大学博士研究生； 刘青(1967-)，男，陕西神木人，北京科技大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51074023).

Influences of EMBr on Flow and Heat Transfer in CSP Mold

ZHANG Xiao-feng1,2， ZHANG Lu-sha1,2， WANG Bao1,2， LIU Qing1,2   

  1. 1. State Key Laboratory of Advanced Metallurgy， University of Science and Technology Beijing， Beijing 100083， China; 2. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China.
  • Received:2013-12-12 Revised:2013-12-12 Online:2015-02-15 Published:2014-11-07
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摘要： 采用数值模拟方法，通过计算1500mm×90mm CSP漏斗型结晶器内磁场、流场和温度场分布，研究了CSP漏斗型结晶器采用不同浸入式水口条件下电磁制动对钢液流动和传热行为的影响.研究结果表明，施加电磁制动后，采用牛鼻子水口的结晶器内流股冲击深度变小，自由液面最大速度从0.231m/s降至0.067m/s；采用双侧孔水口的结晶器内钢液主流股向上弯曲的趋势消失，流股对结晶器窄侧壁的冲击强度减弱，结晶器上部回流钢液速度减小，自由液面最大速度从0.798m/s降到0.140m/s.综合比较采用两种水口时电磁制动对钢液流动和传热行为的影响，采用双侧孔水口时制动效果较好，有利于提高铸坯质量.

关键词: CSP漏斗型结晶器, 浸入式水口, 电磁制动, 数值模拟

Abstract: The magnetic field， flow field and temperature field in the CSP funnel type mold with a size of 1500mm×90mm were calculated by numerical simulation， and the influences of electromagnetic brake(EMBr) on the behavior of flow and heat transfer of molten steel with different submerged entry nozzle(SEN) in the CSP mold were researched. The results show that the impinging depth of steel jet is shortened in the mold with cow-nose nozzle when the EMBr is employed， and the maximum velocity in the free surface is decreased from 0.231m/s to 0.067m/s. The upswept trend of liquid steel mainstream disappears under the influence of EMBr when the bifurcated nozzle is adopted. The impinging strength of steel jet on the narrow side of mold is weakened. The velocity of molten steel in the upper circumfluence is reduced. The maximum velocity in the free surface decreases from 0.798m/s to 0.140m/s. Comparing synthetically the influences of EMBr on the behavior of fluid flow and heat transfer with the two kinds of SEN， the braking effect is better under the condition of bifurcated nozzle， and the quality of thin slab is improved.

Key words: CSP funnel type mold, submerged entry nozzle(SEN), electromagnetic brake, numerical simulation

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