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首页> 外文会议>The 2nd International symposium on clean steel >Study on Absorption Rate by Eccentric Mechanical Stirring in Gas Injection Refining for Iron and Steel Making
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Study on Absorption Rate by Eccentric Mechanical Stirring in Gas Injection Refining for Iron and Steel Making

机译：钢铁注气精炼中偏心机械搅拌吸收速率的研究。

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摘要

In gas injection refining processes, a great amount of gas is injected into molten metal in short time, so that very large bubbles are inevitably formed. Wide dispersion of small bubbles in the bath is indispensable for high refining efficiency. Eccentric mechanical stirring with unidirectional impeller rotation was tested using a water model for pursuing better bubble disintegration and dispersion. Absorption rate are used to research on the influence law of the bubble dispersion and disintegration and gas-liquid absorption by the influence of, rotation mode, rotation speed and gas flow rate. Compared to the experimental results of absorption rate under eccentric stirring and centric stirring .provide the scientific experimental and theoretical guidance for high-temperature experiment of hot metal desulfurization .According to experimental and theoretical analysis, this paper has studied various factors effecting on gas absorption process and volumetric mass transfer coefficient using the system of CO2-NaOH-H2O.The results show that:the volumetric mass transfer coefficient and absorption efficiency of CO2 can be increased under eccentric stirring mode, Because bubble disperse quickly with eccentric mechanical stirring, which results in promoting complete reaction between CO2 and NaOH, and improving the mass transfer coefficient and absorption. Volumetric mass transfer coefficient and efficiency of CO2 increase with the increasing rotation speed under the condition of eccentric stirring .But volumetric mass transfer coefficient and efficiency of CO2 decrease with the increasing rotation speed under the condition of centric stirring.
机译：在注气精炼工艺中，大量气体会在短时间内注入熔融金属，因此不可避免地会形成很大的气泡。小气泡在浴中的广泛分散对于提高精炼效率是必不可少的。使用水模型测试了具有单向叶轮旋转的偏心机械搅拌，以实现更好的气泡崩解和分散。利用吸收速率，通过旋转方式，转速和气体流速的影响，研究气泡的分散，崩解和气液吸收的影响规律。与偏心搅拌和中心搅拌下的吸收率实验结果相比，为铁水脱硫高温实验提供了科学的实验和理论指导。根据实验和理论分析，研究了影响气体吸收过程的各种因素。结果表明：在偏心搅拌模式下，由于气泡在偏心机械搅拌下迅速分散，因此可以提高CO2的体积传质系数和吸收效率。促进CO2和NaOH之间的完全反应，并改善传质系数和吸收率。在偏心搅拌条件下，随着转速的增加，体积传质系数和CO 2效率增加；而在偏心搅拌条件下，随着转速的增加，CO 2的体积质量传递系数和效率降低。

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  • 来源
  • 会议地点 Shenyang(CN)
  • 作者

    LIU Yan; ZHANG Ting-an; MASAMICHI Sano; WANG Qiang; HE Ji-cheng;

  • 作者单位

    Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China;

    Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China;

    Nagoya University, 464-8603, Japan;

    Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China;

    Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 炼钢;
  • 关键词

    eccentric stirring; bubble dispersion; bubble disintegration; volumetric mass transfer coefficient; efficiency of CO2;

    机译：偏心搅拌气泡分散气泡崩解；体积传质系数二氧化碳效率；;

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