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A CFD Study on Refractory Wear in RH Degassing Process

机译：RH脱气过程中耐火磨损的CFD研究

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摘要

In order to assess the wear damage of the lining refractory in the RH degasser, a transient 3D numerical model has been established using volume of fluid approach-discrete phase model (VOF-DPM) technology. The gas-oil-water three-phase flow in a RH degasser water model was evaluated. The breakup and coalescence of gas bubble was taken into account, and moreover the bubble diameter changed with static pressure. The wall shear stress and turbulence intensity were employed to predicate the erosion rate of the lining refractory, while the diffusion coefficient of the refractory material and the slag property at high temperature were used to consider the corrosion rate. The effects of the operational parameters on the refractory wear rate were clarified. A careful comparison between the experimental and the numerical results was conducted for the model validation. The results show that the wear behavior of the lining refractory at the up snorkel wall is the most severe due to the rapidly rising bubble. The vacuum chamber wall that near the up snorkel is also subjected to a serious wear damage. Besides, a higher wear rate is observed at the ladle wall that close to the oil/water interface, since both the physical erosion and chemical corrosion contribute to the wear damage of the lining refractory here. The developed model could help smelters to estimate the remaining thickness of the refractory in the RH degasser under different operational conditions.
机译：为了评估RH脱气器中衬里耐火的磨损损伤，使用流体方法 - 离散相模型（VOF-DPM）技术的体积建立了瞬态3D数值模型。评估RH脱气水模型中的气体油水三相流动。考虑气泡的分解和聚结，而且气泡直径随着静压而变化。采用壁剪切应力和湍流强度使衬里耐火的腐蚀速度谓，而耐火材料的扩散系数和高温下的炉渣性能用于考虑腐蚀速率。阐明了操作参数对耐火磨损率的影响。对模型验证进行了实验和数值结果之间的仔细比较。结果表明，由于泡沫迅速上升，衬砌壁在上升墙上的衬里耐火材料的磨损行为最严重。在浮潜附近的真空室壁也受到严重磨损损坏。此外，在靠近油/水界面的钢包壁上观察到更高的磨损率，因为物理腐蚀和化学腐蚀都有助于这里衬里耐火的磨损损坏。开发的模型可以帮助冶炼在不同的操作条件下估计RH脱气器中耐火材料的剩余厚度。

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  • 来源
    《ISIJ international》 |2020年第9期|1938-1947|共10页
  • 作者

    Qiang WANG; Shuyuan JIA; Fengsheng Ql; Guangqiang LI; Yawei LI; Tao WANG; Zhu HE;

  • 作者单位

    The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan 430081 P.R. China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and Technology Wuhan 430081 P.R. China;

    The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan 430081 P.R. China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and Technology Wuhan 430081 P.R. China;

    School of Metallurgy Northeastern University Shenyang 110819 P.R. China;

    The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan 430081 P.R. China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and Technology Wuhan 430081 P.R. China;

    The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan 430081 P.R. China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and Technology Wuhan 430081 P.R. China;

    Baoshan Iron & Steel Co. Ltd. Shanghai 201900 P.R. China;

    The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan 430081 P.R. China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and Technology Wuhan 430081 P.R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    RH degassing process; refractory wear; erosion and corrosion; three-phase flow; CFD;

    机译：RH脱气过程;耐火磨损;侵蚀和腐蚀;三相流动;差价合约;

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