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›› 2012, Vol. 12 ›› Issue (4): 550-557.

• 流动与传递 • 上一篇    下一篇

板坯连铸中电磁制动方式对结晶器中钢液流场的影响

贾皓 张振强 常同旭 邓康 任忠鸣   

  1. 上海大学上海市现代冶金与材料制备重点实验室 上海大学上海市现代冶金与材料制备重点实验室 上海大学上海市现代冶金与材料制备重点实验室 上海大学材料学院 上海大学材料学院
  • 收稿日期:2012-04-24 修回日期:2012-06-04 出版日期:2012-08-20 发布日期:2012-08-20
  • 通讯作者: 邓康

Influence of EMBr on Flow Field of Molten Steel in a Continuous Casting Slab Mold

JIA Hao ZHANG Zhen-qiang CHANG Tong-xu DENG Kang REN Zhong-ming，   

  1. Shanghai Key Laboratory of Modern Metallurgy and Material Processing, Shanghai University Shanghai Key Laboratory of Modern Metallurgy and Material Processing, Shanghai University Shanghai Key Laboratory of Modern Metallurgy and Material Processing, Shanghai University School of Materials Science and Engineering, Shanghai University School of Materials Science and Engineering, Shanghai University
  • Received:2012-04-24 Revised:2012-06-04 Online:2012-08-20 Published:2012-08-20
  • Contact: DENG Kang

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被引次数

12

摘要： 以水银模拟钢水，研究了板坯连铸电磁制动过程中不同拉速下，不同电磁制动方式[单条型电磁制动(EMBr-Ruler)和流动控制结晶器(FC Mold)]对结晶器内钢水流动的影响规律. 实验表明，(1) FC Mold可有效抑制结晶器内液面流及其波动行为(拉速0.52 m/min时最大液面流速和湍流度分别为无电磁制动时的1/5和1/6); (2)两种电磁制动方式均会压缩水口出流的扩张空间，结晶器窄壁附近向下液流的竖直流速剧增[拉速0.41 m/min时最大竖直流速由0.030 m/s(无电磁制动)增至0.066 (EMBr-Ruler)和0.057 m/s (FC Mold)]，不利于快速形成活塞流；(3)高拉速(如2.0 m/min)时FC Mold电磁制动可获得较好的流场形态(液面最大流速为0.028 m/s)，中拉速(如1.3 m/min)时EMBr-Ruler电磁制动所得流态较好，而低拉速(如1.0 m/min)时2种电磁制动方式均未获得预想的效果，甚至会恶化结晶器内原有的流态.

关键词: 板坯连铸, 结晶器, 流场, 电磁制动, 物理模拟

Abstract: A mercury model was developed to studied the effects of different types of electromagnetic brake (EMBr), electromagnetic mold brake ruler (EMBr-Ruler) and flow control mold (FC Mold) on molten steel flow with the practical casting speeds of 1.0, 1.3 and 2.0 m/min in a slab continuous casting mold. The results show that the velocity and fluctuation of the liquid surface flow are depressed with FC Mold, the maximum values of the horizontal velocity and turbulent intensity near the surface are 1/5 and 1/6 respectively compared with those without EMBr, both types of EMBr compress the expanding space of the jet discharged from the outport, the maximum vertical velocity of downward flow near the narrow wall increases from 0.030 m/s without EMBr to 0.066 (EMBr-Ruler) and 0.057 m/s (FC Mold), it inhibits the formation of plug flow. EMBr is conductive to the formation of plug flow when the port is placed in the EMBr region and the casting speed is suitable. The flow velocity distribution in mold with FC Mold is better than that without EMBr and with EMBr-Ruler with high practical casting speed (2 m/min). The flow field is better with EMBr-Ruler at 1.3 m/min, but when the casting speed is low (1 m/min), the effects of two types of EMBr are unsatisfactory, even deteriorate the original metal flow.

Key words: continuous casting of slab, mold, flow field, electromagnetic braking, physical simulation

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