东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (1): 35-43.DOI: 10.12068/j.issn.1005-3026.2025.20230220

• 材料与冶金 • 上一篇    下一篇

铁矿石烧结过程传质传热数值模拟

李中正, 吴朝霞, 王金杨, 康增鑫   

  1. 东北大学秦皇岛分校 控制工程学院,河北 秦皇岛 066004
  • 收稿日期:2023-07-26 出版日期:2025-01-15 发布日期:2025-03-25
  • 作者简介:李中正(1999—),男,山西吕梁人,东北大学硕士研究生.
  • 基金资助:
    河北省教育厅科学技术研究项目(BJ2021099)

Numerical Simulation of Mass and Heat Transfer in Iron Ore Sintering Process

Zhong-zheng LI, Zhao-xia WU, Jin-yang WANG, Zeng-xin KANG   

  1. School of Control Engineering,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China. Corresponding author: WU Zhao-xia,E-mail: ysuwzx@126. com
  • Received:2023-07-26 Online:2025-01-15 Published:2025-03-25

摘要:

以某钢铁厂360 m2带式烧结机单节台车中的烧结料为研究对象,基于多孔介质模型和烧结理论,结合局部非平衡热力学理论、组分传输理论以及烧结过程中各种关键子模型的动力学方程,建立了二维瞬态烧结料烧结过程传质传热的数学模型.模拟研究影响烧结过程传质传热的主要因素和规律,得到了烧结过程中料层温度、料层中烟气主要成分具体分布情况.结果表明:抽风负压的增加使料层的整体温度升高、料层中氧气含量上升和二氧化碳含量降低;料层厚度的增加使料层的整体温度升高、料层中氧气含量下降和二氧化碳含量上升.台车底部合适的抽风负压和料层厚度分别为12 kPa和0.6 m,燃烧带料层温度接近于1 500 K,且燃烧带料层中氧气和二氧化碳体积分数分别为11%和10%左右.

关键词: 烧结矿, 多孔介质, 烧结过程, 传质传热, 数值模拟

Abstract:

Taking the sintering material in a single pallet of a 360 m2 belt sintering machine in a steel plant as the research object, based on the porous media model and sintering theory, combined with local non‑equilibrium thermodynamic theory, component transport theory and the kinetic equation of various key sub‑models, a two‑dimensional transient mathematical model of mass and heat transfer in the sintering process of sintering material was established. The main factors and laws affecting the mass and heat transfer in the sintering process were simulated and studied, and the material bed temperature, the specific distribution of the main flue gas components in the material layer were obtained. The results show that, an increase in negative pressure of the exhaust caused a rise of overall temperature in the material layer, an increase in oxygen content and a decrease in carbon dioxide content in the material layer. The increase in thickness of the material layer leads to a rise of overall temperature, a decrease in oxygen content, and an increase in carbon dioxide content in the material layer. The appropriate exhaust negative pressure at the bottom of the trolley and material layer thickness are 12 kPa and 0.6 m, respectively. The temperature of the combustion zone is close to 1 500 K, and the volume fractions of oxygen and carbon dioxide in the combustion zone are about 11% and 10%, respectively.

Key words: sinter, porous media, sintering process, mass and heat transfer, numerical simulation

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