Influence of oxygen-rich hot air composite gas medium on sintering performance and function mechanism

Hot air sintering technology is used to improve the quality and production efficiency of sintered ore. However, the current thick layer condition highlights the disadvantage of the low oxygen potential of the hot air sintering layer. Therefore, it is considered to use oxygen enrichment sintering to...

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Bibliographic Details
Published in:Journal of iron and steel research, international international, 2024-05, Vol.31 (5), p.1071-1081
Main Authors: Gan, Min, Zheng, Hao-xiang, Fan, Xiao-hui, Ji, Zhi-yun, Li, Qiang, Wu, Ming, Wang, Yi-fan, Wang, Xiao-long, Wu, Yu-feng, Chen, Xu-ling, Sun, Zeng-qing, Huang, Xiao-xian
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Engineering
Machines
Manufacturing
Materials Engineering
Materials Science
Metallic Materials
Original Paper
Physical Chemistry
Processes
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Summary:Hot air sintering technology is used to improve the quality and production efficiency of sintered ore. However, the current thick layer condition highlights the disadvantage of the low oxygen potential of the hot air sintering layer. Therefore, it is considered to use oxygen enrichment sintering to improve the environment of hot air sintering. Traditional sintering, hot air sintering, and oxygen-rich hot air sintering were compared through sintering cup experiments, and the influence of hot air and oxygen-rich hot air on sintering indexes was clarified. Hot air reduced the vertical sintering velocity, while improved the yield and tumbler index. Oxygen-rich hot air sintering contributed to improving the vertical sintering velocity while ensuring the quality of sintered ore, thus comprehensively improving production efficiency. Under the action of hot air, the highest temperature of the sintering layer increased and the high-temperature holding time was prolonged. After oxygen enrichment, the combustion efficiency of fuels in the upper layer of materials was promoted, which optimized heat distribution in the middle and lower layers of materials and increased the content of calcium ferrite in the sintered ore, thus strengthening the sintering process.
ISSN:1006-706X
2210-3988
DOI:10.1007/s42243-023-01127-9