东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (9): 41-50.DOI: 10.12068/j.issn.1005-3026.2025.20240029

• 材料与冶金 • 上一篇    下一篇

旋风炉内气固两相流动特性的数值模拟

齐霖1,2, 曲迎霞1,2(), 姜大鹏3, 邹宗树1,2   

  1. 1.东北大学 多金属共生矿生态化冶金教育部重点实验室,辽宁 沈阳 110819
    2.东北大学 冶金学院,辽宁 沈阳 110819
    3.国家税务总局 辽宁省税务局,辽宁 沈阳 110016
  • 收稿日期:2024-02-02 出版日期:2025-09-15 发布日期:2025-12-03
  • 通讯作者: 曲迎霞
  • 作者简介:齐 霖(1998—),男,黑龙江绥化人,东北大学硕士研究生
    邹宗树(1958—),男,山东章丘人,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(52374329)

Numerical Simulation of Gas-Solid Two-Phase Flow Characteristics in Cyclone Furnace

Lin QI1,2, Ying-xia QU1,2(), Da-peng JIANG3, Zong-shu ZOU1,2   

  1. 1.Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education),Northeastern University,Shenyang 110819,China
    2.School of Metallurgy,Northeastern University,Shenyang 110819,China
    3.Liaoning Provincial Tax Service,State Taxation Administration,Shenyang 110016,China.
  • Received:2024-02-02 Online:2025-09-15 Published:2025-12-03
  • Contact: Ying-xia QU

摘要:

为探究旋风炉在闪速还原炼铁技术中的应用状况与前景,气相采用欧拉模型,颗粒相采用DPM(discrete phase model)对旋风炉内气相流场和颗粒运动轨迹进行了数值模拟.分析了上升气体(熔融还原炉煤气)速度和铁矿粉粒度对气固两相流动特性的影响.结果表明:旋流场的切向速度在喷枪区域呈近似“凹”字形分布,在喷枪以上区域呈近似“M”形分布;上升气体速度由4 m/s增至8 m/s,气体切向速度最大值减小,铁矿粉捕集率由98.99%降至93.51%,但强旋湍流区逐渐上移,铁矿粉运动路径变长,更有利于其熔化和还原.此外,捕集率随着粒度的增大先减小后增大,但大粒度铁矿粉几乎不发生螺旋向上运动.

关键词: 旋风炉, 铁矿粉, 气固两相流, 切向速度

Abstract:

In order to explore the application status and prospects of cyclone furnaces in flash ironmaking technology, numerical simulations were conducted on the gas flow field and particle trajectories within the cyclone furnace using the Eulerian model and DPM, respectively. The effects of the rising gas(smelting reduction vessel gas)velocity and iron ore particle size on the characteristics of gas-solid two-phase flow were analyzed. The results show that the tangential velocity distribution of the vortex field approximately forms a “concave” shape in the lance region and an “M” shape in the region above the lance. As the rising gas velocity increases from 4 m/s to 8 m/s, the maximum tangential velocity of the gas decreases, and the capture rate of the iron ore particles decreases from 98.99% to 93.51%. However, the strong swirling turbulent region gradually moves upward, and the trajectory of the iron ore particles becomes longer, which is more conducive to the melting and reduction. In addition, the capture rate first decreases and then increases with increasing particle size, but the iron ore particles of large size hardly undergo upward spiral motion.

Key words: cyclone furnace, iron ore powder, gas-solid two-phase flow, tangential velocity

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