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| Research progress on synergistic control of CO and NO in sintering flue gas |
| LI Jie1, HAO Xintao1, ZHAO Xinfeng1, ZHANG Zunqian1, YANG Aimin2, YANG Qiang1 |
1. School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China;
2. School of Science, North China University of Science and Technology, Tangshan 063210, Hebei, China |
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Abstract Under the environment of carbon peaking and carbon neutrality policy, sintering flue gas has gradually become the focus of energy conservation and emission reduction in iron and steel industry. CO and NO in the sintering flue gas are studied, the formation mechanism of CO and NO in the sintering flue gas is analyzed, and the current methods for the separate removal of CO and NO from the sintering flue gas are analyzed and summarized from the aspects of source reduction and terminal treatment. At present, China′s requirements for green and low-carbon development are relatively strict, and there are often problems such as high energy consumption and high cost in separate removal, while the reduction of NO by CO in sintering flue gas has good thermodynamic and kinetic conditions, and the removal products will not cause secondary pollution. The synergistic control methods of CO and NO in sintering flue gas are reviewed. Both the CO-SCR method and the sintering flue gas circulation method have good control effects on the reduction of NO by catalytic CO. The catalytic mechanism of calcium ferrite is the future development trend of synergistic control for sintering flue gas.
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Received: 18 April 2023
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2023, Vol. 33 
