Guo Xinwei, Ji Jiaoyang, Gao Yanyang, Wu Xingyuan, Guo Yiming, Wang Weishu, Wen Meng, Wu Xiaojiang, Zhang Zhongxiao
College of Energy and Power Engineering, North China University of Water Resource and Electric Power, Zhengzhou, 450045, China.
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200245, China.
Sci Rep. 2025 Apr 1;15(1):11146. doi: 10.1038/s41598-024-81492-x.
This study examines the impact of sintering air volume on the characteristics of combustible lean gases (CO, H, and CH) in sintering flue gas. By conducting experiments using a fixed combustion test bench, we analyzed the changes in sintering negative pressure, flue gas composition, and sinter quality under various air volume conditions. The results demonstrate that an air volume of 90 m³/(m²·min) leads to a lower combustion ratio (ω(CO)/ω(CO + CO)), indicating more efficient utilization of fuel chemical energy. Additionally, increasing the air volume per unit area reduces the sintering time. The mass fractions of CO and H decrease with increasing air volume, and the mass fraction of CH also decreases, underscoring the importance of its recovery due to its high global warming potential (28 times that of CO). These findings provide guidance for optimizing sintering conditions to improve lean gas recovery and reduce environmental impacts.
本研究考察了烧结风量对烧结烟气中可燃贫气（CO、H和CH）特性的影响。通过使用固定燃烧试验台进行实验，我们分析了不同风量条件下烧结负压、烟气成分和烧结质量的变化。结果表明，风量为90 m³/(m²·min)时燃烧比（ω(CO)/ω(CO + CO)）较低，表明燃料化学能利用更高效。此外，单位面积风量增加会缩短烧结时间。CO和H的质量分数随风量增加而降低，CH的质量分数也降低，鉴于其高全球变暖潜能值（是CO的28倍），这凸显了回收CH的重要性。这些研究结果为优化烧结条件以提高贫气回收率和减少环境影响提供了指导。
