Fluid Flow in Tundish Due to Different Type Arrangement of Weir and Dam

Yanping Bao, Wei Jiang, Baomei Xu, Haizhong Zhang

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    Cite this article as:

    Yanping Bao, Wei Jiang, Baomei Xu, and Haizhong Zhang, Fluid Flow in Tundish Due to Different Type Arrangement of Weir and Dam, J. Univ. Sci. Technol. Beijing , 9(2002), No. 1, pp.13-15.
    Yanping Bao, Wei Jiang, Baomei Xu, and Haizhong Zhang, Fluid Flow in Tundish Due to Different Type Arrangement of Weir and Dam, J. Univ. Sci. Technol. Beijing , 9(2002), No. 1, pp.13-15.
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    Metallurgy

    Fluid Flow in Tundish Due to Different Type Arrangement of Weir and Dam

    • Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China

      通信作者:

      Yanping Bao E-mail: baoyp@metall.ustb.edu.cn

    中文摘要

    Tundish is an important metallurgical reactor in the continuous casting process. In order to control the fluid flow in tundish and thus take full advantage of the residencetime available for the removal of inclusions from molten steel, the effect of weir and dam on the fluid flow has been studied in a water model based on the characteristic number Froude and Reynold number similarity criteria. The residence time distribution curves of the flow were measured by SG800. The optimum arrangement of darn and weir and the nonstationary flow in tundish were discussed. The results show that the combination of weir and dam is benefit for the flow pattern in tundish, weir can prevent the upper recirculating flow, dam can cut off the bottom flow and turn to upwards, it is advantageous to separate the nonmetallic inclusions. Furthermore, it is important to exceed the critical depth of bath during exchange ladles, not only for the inclusion floatation but also for avoiding tundish slag drainage earlier.

     

    Metallurgy

    Fluid Flow in Tundish Due to Different Type Arrangement of Weir and Dam

    Author Affilications

      • Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China

    • Received: 09 May 2001;
    Tundish is an important metallurgical reactor in the continuous casting process. In order to control the fluid flow in tundish and thus take full advantage of the residencetime available for the removal of inclusions from molten steel, the effect of weir and dam on the fluid flow has been studied in a water model based on the characteristic number Froude and Reynold number similarity criteria. The residence time distribution curves of the flow were measured by SG800. The optimum arrangement of darn and weir and the nonstationary flow in tundish were discussed. The results show that the combination of weir and dam is benefit for the flow pattern in tundish, weir can prevent the upper recirculating flow, dam can cut off the bottom flow and turn to upwards, it is advantageous to separate the nonmetallic inclusions. Furthermore, it is important to exceed the critical depth of bath during exchange ladles, not only for the inclusion floatation but also for avoiding tundish slag drainage earlier.

     

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