Technical path analysis and development suggestion of blast furnace low carbon ironmaking
The steel industry is one of the major sectors for energy consumption and carbon emissions.Under the global dual carbon background,the heightened awareness of climate change and environmental protection,coupled with the strengthening of carbon tax policies,has intensified the pressure on the steel industry to reduce carbon emis-sions.Considering factors such as asset preservation and the maturity of technology,the low-carbon technology of blast furnace processes is currently the most direct and effective technical measure to reduce carbon emissions.The main technical routes and development directions of low-carbon metallurgy in blast furnaces both domestically and internationally are introduced,and the demonstration projects of low-carbon ironmaking in China's blast furnaces in recent years are summarized.The author believes that the hydrogen-rich blast furnace process is the preferred direc-tion for process technology improvement at this stage.However,its capacity for carbon emission reduction is lim-ited,only achieving a reduction of 10％to 30％in CO2 emissions,and it cannot fundamentally solve the problem of high carbon emissions from blast furnaces.In response to this issue,a full-process low-carbon ironmaking technol-ogy with upstream carbon reduction of biomass,midstream carbon reduction of hydrogen enrichment,and down-stream carbon fixation of CCUS for blast furnaces is proposed,and made an in-depth analysis of the key technologies of each route,and the carbon reduction cost and emission reduction potential of three processes are obtained.It is believed that the full-process low-carbon ironmaking technology will be an important direction for the future develop-ment of the steel industry,with high technical feasibility and emission reduction effectiveness.This will promote the steel industry to develop in a more clean and efficient direction,achieving dual carbon goals while maintaining the sustainability of economic development,and prospects for the future of China's low-carbon route in blast furnaces are also discussed.
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