中国钢铁工业绿色发展回顾及展望

doi:10.13228/j.boyuan.issn0449-749x.20220465

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Abstract The green development of steel industry is an important way to promote the transformation and upgrading of steel industry and achieve sustainable development. The green development of Chinese steel industry has gone through four stages: end-of-pipe treatment,clean production,ecological industry and circular economy. Under the guidance of policies related to the green development of the steel industry,the steel industry has promoted and applied technologies such as coke dry quenching,oxygen-enriched coal injection in blast furnaces,hot feeding and hot loading of continuous casting billets,and carried out ultra-low emission renovation,pilot demonstration of clean production,eco-industrial demonstration parks,and circular economy demonstration sites. The green development of steel industry has made great progress around the three functions of steel manufacturing process: steel product manufacturing,energy conversion,waste treatment and recycling.The specific energy consumption per ton of steel (measured by coal equivalents) decreased by 71.8% from 1.93 t/t in 1981 to 0.55 t/t in 2020; the emissions of particulate pollutant and SO₂ per ton of steel decreased from 6.77 kg/t and 5.56 kg/t in 2000 to 0.36 kg/t and 0.30 kg/t in 2020,with a decrease of 94.7% and 94.6%,respectively. The NO_x emissions per ton of steel decreased from 1.68 kg/t in 2007 to 0.87 kg/t in 2020,with a decrease of 48.2%. The chemical oxygen demand emissions per ton of steel decreased from 0.99 kg/t in 2000 to 0.02 kg/t in 2017,with a decrease of 98.2%. The utilization rate of BF slag and BOF slag has been higher than 90% since 2005. Fresh water consumption per ton of steel decreased by 90.3% from 25.24 m³/t in 2000 to 2.45 m³/t in 2020. In the future,with the evolution of the three functions of steel manufacturing process,the green development of steel industry will be promoted in the direction of low carbonization,greenization and intelligence. Through the research and application of a batch of green low carbon technologies such as short process of fully scrap-EAF,hydrogen reduction,non-blast furnace ironmaking,CCUS and intelligent technologies in steel production and enterprise decision-making,the high-quality development of steel industry will be realized.

Key words： steel industry green development physical essence low carbonization greenization intelligent

Received: 07 July 2022

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	WANG Hai-feng
	PING Xiao-dong
	ZHOU Ji-cheng
	LI Xiu-ping
	LU Li-jin

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WANG Hai-feng,PING Xiao-dong,ZHOU Ji-cheng等. Review and prospect of green development for Chinese steel industry[J]. Iron and Steel, 2023, 58(2): 8-18.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20220465 OR http://www.chinamet.cn/Jweb_gt/EN/Y2023/V58/I2/8

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