东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (4): 16-23.DOI: 10.12068/j.issn.1005-3026.2025.20230312

• 材料与冶金 • 上一篇    下一篇

旋流喷吹角度对RH精炼多相流及混匀行为的影响

韩宇超, 谢清华, 倪培远, 厉英   

  1. 东北大学 冶金学院,辽宁 沈阳 110819
  • 收稿日期:2023-11-15 出版日期:2025-04-15 发布日期:2025-07-01
  • 作者简介:韩宇超(1998—),男,黑龙江齐齐哈尔人,东北大学硕士研究生
    倪培远(1987—),男,山东潍坊人,东北大学教授,博士生导师
    厉 英(1963—),女,安徽合肥人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(52374333);中央高校基本科研业务费专项资金资助项目(N2325010)

Effect of Swirling-Flow Gas Injection Angle on Multiphase Flow and Mixing Behavior in RH Refining Process

Yu-chao HAN, Qing-hua XIE, Pei-yuan NI, Ying LI   

  1. School of Metallurgy,Northeastern University,Shenyang 110819,China. Corresponding author: NI Pei-yuan,E-mail: nipeiyuan@smm. neu. edu. cn
  • Received:2023-11-15 Online:2025-04-15 Published:2025-07-01

摘要:

利用数值模拟研究了旋流喷吹角度对RH(Ruhrstahl-Heraeus)精炼过程中多相流、循环流量及混匀时间的影响.与传统喷吹相比,采用喷嘴水平旋转30°+竖直倾斜15°和水平旋转30°+竖直倾斜30°喷吹时,RH循环流量分别提高了17.8%和20.1%,混匀时间分别缩短32.6%以及21.4%.采用旋流喷吹时,上升管内钢液产生旋转流动,速度分布更均匀,旋流促进了氩气泡在上升管内的向心运动,与传统喷吹相比气泡分散度提高,强化了气/液两相作用、钢液传质及提高了混匀效率.此外,与喷嘴仅水平旋转30°相比,采用喷嘴水平旋转30°+竖直倾斜15°喷吹时,上升管壁面剪切应力由500 Pa降低至约100 Pa,且高壁面剪切应力区域面积大大减小,有利于降低钢液对耐火材料的冲刷侵蚀.

关键词: RH精炼, 旋流喷吹, 循环流量, 混匀时间, 数值模拟

Abstract:

The effects of swirling-flow gas injection angles on multiphase flow, circulation flow and mixing time in the RH refining process were investigated using numerical simulation. Compared with the conventional gas injection mode, the circulation flow increased by 17.8% and 20.1%, respectively, when the swirling-flow gas injection nozzles with 30° horizontal angle + 15° vertical angle and 30° horizontal angle + 30° vertical angle were employed. Moreover, the mixing time was reduced by 32.6% and 21.4%, respectively. With the swirling-flow gas injection technology, a swirling steel flow was generated in the up-snorkel and the steel flow velocity was more uniform. The swirling-flow caused argon bubbles to move centripetally in the up-snorkel. The bubble dispersion was improved compared to the conventional gas injection mode. This promoted the gas-liquid two-phase interaction, mass transfer and mixing efficiency. Additionally, the wall shear stress was reduced from 500 Pa to around 100 Pa when the swirling-flow gas injection of 30° horizontal angle 15°vertical angle was applied, compared to swirling-flow gas injection with only 30° horizontal angle. Also, the area of the high wall shear stress region was decreased greatly, which is helpful to reduce the erosion of refractory materials by molten steel.

Key words: RH refining, swirling-flow gas injection, circulation flow, mixing time, numerical simulation

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