基于调控含钙化合物反应行为的烧结过程NO<sub>x</sub>减排研究进展

doi:10.13228/j.boyuan.issn0449-749x.20190224

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Abstract How to cost-effectively reduce NO_x emissions of the iron ore sintering process is a new challenge for iron and steel industries at present. Since there exists a working condition for the reduction of NO to N₂ in the sintering bed, and calcium-containing compounds have a catalytic effect on the NO reduction reaction, the thermodynamics and kinetics of the main reduction reactions of NO are first discussed. It was concluded that the NO-CO reduction reaction had great advantages in thermodynamics and kinetics. Then, the catalytic mechanisms of NO-CO reduction reaction by calcium-containing compounds, such as CaO and calcium ferrites minerals were analyzed. Moreover, the influence of the reaction behavior regulations of primary calcium-containing compounds such as lime/limestone and secondary calcium-containing compounds such as calcium ferrites minerals on NO reduction in the sintering bed were discussed in detail. In addition, the development directions of promoting NO reduction were proposed by clarifying the main influencing factors of NO-CO reaction, the adsorption behaviors of CO and NO by calcium ferrite minerals, and the regulations of changing the height of the sinter bed combined with optimizing the reaction behaviors of calcium-containing compounds, respectively.

Key words： iron ore sinter NO_x calcium-containing compounds reaction behavior process control

Received: 21 May 2019

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	WU Sheng-li
	QUE Zhi-gang
	AI Xian-bin

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WU Sheng-li,QUE Zhi-gang,AI Xian-bin. Research process on regulating reaction behaviors of calcium-containing compounds for reducing NO_x emission in sintering process[J]. Iron and Steel, 2020, 55(3): 1-8.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190224 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I3/1

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