汽车钢板生产的生命周期评价

doi:10.13228/j.boyuan.issn0449-749x.20220645

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Abstract Driven by "carbon peak and carbon neutrality",automobile manufacturing industry is an important part of energy saving and carbon reduction. As a resource and energy intensive industry,it uses automobile steel plate as the main material,which has the typical characteristics of high production energy consumption and emissions. The life cycle assessment (LCA) method was used to conduct environmental impact assessment and contribution analysis for each stage of the long process (BF-BOF) and short process (EAF) of automobile steel plate production. The results show that in BF-BOF, the iron making process and sintering process have greater contribution to the total environmental impact. In automotive steel plate production short process (EAF), iron making process and electric furnace steelmaking process contribute greatly to the total environmental impact. The environmental impacts of EAF process in automobile steel plate production are lower than those of BF-BOF process. Global warming (GWP),fossil energy depletion (FFP),mineral resource depletion (SOP),freshwater eutrophication (FEP),marine eutrophication (MEP),freshwater ecotoxicity (FETP),human carcinogenic toxicity (HTPc),and human non-carcinogenic toxicity (HTPnc) are the major environmental impacts. The copper equivalent of BF-BOF process and EAF process are 85.6 kg/t and 25.6 kg/t,respectively,and the comprehensive energy consumption is 541 kg/t and 265 kg/t,respectively. The carbon dioxide equivalent was 2 111.7 kg/t and 1 054.9 kg/t. The resource consumption, energy consumption and greenhouse gas emission of EAF process are better than those of BF-BOF process,which are 70.1%,51.0% and 50.1% lower,respectively. The three types of environmental damage of EAF process are lower than that of BF-BOF process,which has certain environmental advantages. Therefore,if conditions permit,increasing the production proportion of EAF process will contribute to the low-carbon and sustainable development of automobile manufacturing and steel industry.

Key words： automotive steel sheet steel plate production environmental impact assessment life cycle assessment energy consumption

Received: 13 October 2022

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	ZHU Shuai-kang
	GONG Xian-zheng
	GAO Feng
	LIU Yu

Cite this article:

ZHU Shuai-kang,GONG Xian-zheng,GAO Feng等. Life cycle assessment of automotive steel sheet production[J]. Iron and Steel, 2023, 58(5): 145-152.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20220645 OR http://www.chinamet.cn/Jweb_gt/EN/Y2023/V58/I5/145

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