东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (11): 1561-1564.DOI: 10.12068/j.issn.1005-3026.2014.11.010

• 材料与冶金 • 上一篇    下一篇

电渣重熔过程渣池磁流体力学行为数值模拟

王晓花，厉英   

  1. (东北大学 材料与冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2013-11-14 修回日期:2013-11-14 出版日期:2014-11-15 发布日期:2014-07-03
  • 通讯作者: 王晓花
  • 作者简介:王晓花(1985-)，女，湖北宜昌人，东北大学博士研究生;厉英(1963-)，女，安徽合肥人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51274057);国家高技术研究发展计划项目(2012AA03A508).

Numerical Simulation of Magnetohydrodynamic Behavior of ESR Slag

WANG Xiaohua， LI Ying   

  1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2013-11-14 Revised:2013-11-14 Online:2014-11-15 Published:2014-07-03
  • Contact: LI Ying
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摘要： 建立了耦合电渣重熔过程渣池内电磁场、温度场和流场的数学模型，在考虑渣池内电磁力和热浮力对熔渣流动影响的基础上，分析了电渣重熔工艺(电极形貌、插入深度和电流强度)对渣池磁流体力学行为的影响规律.结果表明:当电磁力为主时，渣池内存在逆时针涡流；当热浮力为主时，渣池内存在顺时针涡流.电渣重熔电流5kA，频率50Hz，电极端部为平面时，渣池内同时存在逆时针和顺时针涡流，最大流速为005m/s；当电极端部为锥形时，渣池内部只存在顺时针涡流，最大流速为020m/s..增加电极插入深度和增大电流强度都会增强渣池内逆时针涡流；相反，则增强渣池内顺时针涡流.

关键词: 电渣重熔, 渣池, 磁流体力学行为, 数值模拟

Abstract: A coupled model for the magnetic field， temperature field and fluid flow field of electroslag remelting (ESR) was developed. Considering electromagnetic force and thermal buoyancy force effects on the fluid flow in slag pool， the effects of practice parameters (electrode tip shape， immersion depth， and current density) on the magnetohydrodynamic behavior of ESR slag were investigated. The results showed that the anticlockwise circulation pattern is generated in slag pool when electromagnetic force is dominated， and the clockwise circulation pattern is generated in slag pool when buoyancy force is dominated. When current density and current frequency are 5000A and 50Hz， respectively， the anticlockwise vortex and clockwise vortex are coexisted in slag pool for the electrode tip with flat shape， but only clockwise vortex is existed in slag pool for the electrode tip with conical shape. The maximum velocities of molten slag are 005m/s and 020m/s for the electrode tip with flat shape and conical shape， respectively. Increasing immersion depth and current density can enhance anticlockwise vortex in slag pool. On the contrary， the clockwise vortex in slag pool is enhanced.

Key words: electroslag remelting (ESR), slag pool, magnetohydrodynamic behavior, numerical simulation

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