Analysis of main factors affecting NO<sub><i>x</i></sub> emissions in sintering process

WU Sheng-li; ZHANG Yong-zhong; SU Bo; WANG Xu-ming; ZHANG Li

doi:10.13374/j.issn2095-9389.2017.05.007

Volume 39 Issue 5

May 2017

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WU Sheng-li, ZHANG Yong-zhong, SU Bo, WANG Xu-ming, ZHANG Li. Analysis of main factors affecting NOx emissions in sintering process[J]. Chinese Journal of Engineering, 2017, 39(5): 693-701. doi: 10.13374/j.issn2095-9389.2017.05.007

Citation:

WU Sheng-li, ZHANG Yong-zhong, SU Bo, WANG Xu-ming, ZHANG Li. Analysis of main factors affecting NO_x emissions in sintering process[J]. Chinese Journal of Engineering, 2017, 39(5): 693-701. doi: 10.13374/j.issn2095-9389.2017.05.007

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Analysis of main factors affecting NO_x emissions in sintering process

doi: 10.13374/j.issn2095-9389.2017.05.007

1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) Baoshan Iron & Steel Co. Ltd., Shanghai 201900, China

Received Date: 2016-09-11

Abstract

Abstract

After effectively controlling the desulfurization of sintering flue gas, steel companies are now putting denitration on their agendas. In the absence of an economically viable and efficient end-of-pipe de-NO_x system, it is necessary to control the sintering process to reduce NO_x emissions. In this study, the influence of raw material and process condition parameters on NO_x emissions was statistically analyzed with data from Baosteel's sintering production during 2013-2014. The results indicate that NO_x emission levels associated with the sintering process can be lowered by decreasing the percentage of hematite, raising sintering fines and the return fines ratios, and enhancing the cold-air permeability, calcium ratio, and sintering bed depth.
- sintering process,
- nitrous oxides,
- flue gas reduction,
- process control,
- correlation analysis

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References(5)

References

[9]	Wu S L, Sugiyama T, Morioka K, et al. Elimination reaction of NO gas generated from coke combustion in iron ore sinter bed. Tetsu-to-Hagané, 1994, 80(4):276
[10]	Morioka K, Inaba S, Shimizu M, et al. Primary application of the "In-Bed-deNO_x" process using Ca-Fe oxides in iron ore sintering machines. ISIJ Int, 2000, 40(3):280
[12]	Chen Y G, Guo Z C, Wang Z. Application of modified coke to NO_x reduction with recycling flue gas during iron ore sintering process. ISIJ Int, 2008, 48(11):1517
[13]	Katayama K, Kasama S, Sato K, et al. Effect of lime coating coke on decreasing NO_x emission from sintering process//AISTech-Iron and Steel Technology Conference Proceedings. Cleveland, 2015:1499
[14]	Yin J Q, Lü X W, Xiang S L, et al. Influence of CaO source on the formation behavior of calcium ferrite in solid state. ISIJ Int, 2013, 53(9):1571