Study on pollutant reduction effect and environmental benefits of ultra-low emission retrofit of iron and steel sintering process: A case study of a steel group in Gansu province

Zhang Yuhao; Zhao Peiqiang; Li Mingli; Zhang Xinglin; Liu Zewei; Yan Dahai; Chen Chao; Fang Wei

doi:10.1016/j.cjche.2025.08.006

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Study on pollutant reduction effect and environmental benefits of ultra-low emission retrofit of iron and steel sintering process: A case study of a steel group in Gansu province

Updated：2026-03-13

- Study on pollutant reduction effect and environmental benefits of ultra-low emission retrofit of iron and steel sintering process: A case study of a steel group in Gansu province
- Chinese Journal of Chemical Engineering Vol. 89, Issue 1, Pages: 220-229(2026)
- Affiliations：
  
  Lanzhou University, Lanzhou 730000, China
  Zhengdong Space Industry Co., Ltd., Beijing 100020, China
  Gansu Academy of Eco-environmental Sciences, Lanzhou 730030, China
  Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
  Research Institute of Solid Waste Management, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
- Author bio：
  
  Corresponding authors. E-mail addresses: chen.chao@craes.org.cn(C. Chen)
  fangwei@stu.kust.edu.cn(W. Fang).
- Funds：
- DOI：10.1016/j.cjche.2025.08.006
  CLC：
- Received：09 May 2025，
  
  Revised：2025-08-08，
  
  Accepted：12 August 2025，
  
  Online First：04 September 2025，
  
  Published：2026-01
- Accepted：
Scan QR Code
Zhang Yuhao, Zhao Peiqiang, Li Mingli, et al. Study on pollutant reduction effect and environmental benefits of ultra-low emission retrofit of iron and steel sintering process: A case study of a steel group in Gansu province[J]. Chinese Journal of Chemical Engineering, 2026, 89(1): 220-229.
DOI：

Zhang Yuhao, Zhao Peiqiang, Li Mingli, et al. Study on pollutant reduction effect and environmental benefits of ultra-low emission retrofit of iron and steel sintering process: A case study of a steel group in Gansu province[J]. Chinese Journal of Chemical Engineering, 2026, 89(1): 220-229. DOI： 10.1016/j.cjche.2025.08.006.

摘要

Abstract

Iron and steel industry is one of the main sources of air pollution emissions in China. The sintering process is an important link in the blast furnace ironmaking process

but it is also accompanied by a large number of pollutants. Under the background of ultra-low emissions

iron and steel enterprises urgently need to upgrade their existing processes to address the existing process in practical application problems. In this study

a steel group in Gansu Province was taken as an example. By comparing and analyzing the pollutant emission characteristics before and after the ultra-low emission retrofit

the collaborative control effect of the combined process on SO

particulate matter

and dioxins after the new retrofit was systematically evaluated. The results show that after the retrofit

the concentrations of particulate matter

and NO

have dropped to near-zero levels

and the dioxin removal efficiency has reached 98.87%

with all indicators being better than the national ultra-l

ow emission standards. The study confirms that the optimal combination of multi-pollutant collaborative treatment technologies is the key to achieving efficient emission reduction

among which selective catalytic reduction technology has a particularly significant synergistic removal effect on NO

and dioxins. This study provides an important technical reference and practical basis for the ultra-low emission retrofit of the steel industry

and has important guiding significance for promoting the green retrofit of the industry. Its ultra-low emission retrofit is of great significance for achieving green and low-carbon development.

关键词

Keywords

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