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Effect of Traveling Magnetic Field on Flow, Mixing, Decarburization and Inclusion Removal during RH Refining Process

机译:RH精炼过程中行进磁场对流动,混合,脱碳和夹杂物去除的影响

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摘要

In order to improve productivity during RH refining, the traveling magnetic field was imposed around the snorkels. The numerical method was employed to investigate the flow, mixing, decarburization and inclu sion removal in RH degasser. Numerical results showed that the predicted results agree well with the experimental data. With the increasing current, the circulation flow rate increases and the mixing time decreases. If the current frequency lies in the range of 10-30 Hz, with the increasing current frequency, the circulation flow rate increases while the mixing time decreases. If the current frequency lies in the range of 30-60 Hz, with the increasing current frequency, the circulation flow rate decreases while the mixing time increases. In order to increase circulation flow rate and shorten mixing time, the most effec tive measure is to apply the traveling magnetic field around the up snorkel, and the second choice is to apply the traveling magnetic field around the down snorkel if the gas flow rate is smaller than the satura tion value. Applying the traveling magnetic field can accelerate the decarburization rate during the pro cess, but can not decrease the final carbon mass concentration. For inclusion removal, the most effective measure is to apply the traveling magnetic field around the up snorkel and down snorkel, and to apply the traveling magnetic field around the up snorkel has the minor effect. Furthermore, the application of traveling magnetic field can decrease the maximum inclusion characteristic radius and the related peak value time.
机译:为了提高RH精炼的生产率,在通气管周围施加了行进磁场。采用数值方法研究了RH脱气机中的流动,混合,脱碳和夹杂物去除。数值结果表明,预测结果与实验数据吻合良好。随着电流的增加,循环流量增加,混合时间减少。如果当前频率在10-30 Hz的范围内,则随着电流频率的增加,循环流量增加而混合时间减少。如果当前频率在30-60 Hz的范围内,则随着电流频率的增加,循环流量会降低,而混合时间会增加。为了增加循环流量并缩短混合时间,最有效的措施是在上通气管周围施加行进磁场,而第二种选择是在气体通量为零时在下通气管周围施加行进磁场。小于饱和度值。施加行进磁场可以加快过程中的脱碳速度,但不能降低最终碳质量浓度。对于去除夹杂物,最有效的措施是在上通气管和下通气管周围施加行进磁场,而在上通气管周围施加行进磁场影响较小。此外,施加行进磁场可以减小最大夹杂物特征半径和相关的峰值时间。

著录项

  • 来源
    《ISIJ international》 |2012年第6期|p.1036-1044|共9页
  • 作者单位

    Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, Liaoning Province, 110819 P.R. China;

    Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, Liaoning Province, 110819 P.R. China;

    Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, Liaoning Province, 110819 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

    numerical simulation; RH; traveling magnetic field; circulation flow rate; mixing time; decar burization; inclusion removal;

    机译:数值模拟相对湿度行进磁场循环流量混合时间;脱碳去除夹杂物;
  • 入库时间 2022-08-18 00:01:34

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