近零碳排电弧炉炼钢工艺技术研究及展望

doi:10.13228/j.boyuan.issn0449-749x.20220381

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Abstract Carbon emissions from China's iron and steel industry account for 16% of the country's total emissions. Reducing carbon emissions from the iron and steel industry is an important starting point for the Chinese government to realize its commitment of "carbon peaking and carbon neutrality". In the context of carbon neutrality,the global steel industry is accelerating technological innovation to reduce carbon emissions. This paper puts forward a new steelmaking process of electric arc furnace(EAF) steelmaking with near-zero carbon emissions,and points out that technological innovation should be carried out from three aspects: near zero carbon emissions in energy source,smelting process and raw material production,so as to realize near zero carbon emissions in steelmaking process. In the aspect of near zero carbon emissions energy source,it is proposed to use mixed utilization of solar energy,wind energy and valley power,effective storage and release of energy,micro smart grid and optimized power supply to realize the direct and efficient utilization of green energy. In the aspect of near zero carbon emissions in smelting process,the key technologies such as hydrogen burner,carbon free foaming agent,CO₂-Ar bottom blowing for denitrification,submerged O₂-CaO injection for dephosphorization and system energy efficiency evaluation are proposed to realize non-carbon smelting. In the aspect of near zero carbon emissions in raw material production,it is proposed to use green hydrogen direct reduction ironmaking and related supporting technologies,green electric plasma hot blast furnace and carbon capture process to reduce carbon emissions in the production process of raw and auxiliary materials. The energy input in EAF steelmaking process, carbon dioxide emissions from smelting and raw materials production are calculated. Combined with the analysis of carbon reduction capacity of the above key technologies,it is calculated and predicted that the ultimate limit carbon emissions of the new process can be reduced to 64 kg/t. Therefore,it is necessary to carry out research on the EAF steelmaking with near-zero carbon emissions and accelerate its industrial application,which would promote the innovative development and green low-carbon development of China's iron and steel industry.

Key words： near-zero carbon emissions EAF steelmaking green power supply non-carbon smelting low carbon raw materials

Received: 01 June 2022

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	ZHU Rong
	WEI Guang-sheng
	ZHANG Hong-jin

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ZHU Rong,WEI Guang-sheng,ZHANG Hong-jin. Research and prospect of EAF steelmaking with near-zero carbon emissions[J]. Iron and Steel, 2022, 57(10): 1-9.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20220381 OR http://www.chinamet.cn/Jweb_gt/EN/Y2022/V57/I10/1

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