【作者】 屠明伟； 冯超； 朱荣； 高扬； 王天佐； 刘蕾；

【Author】 TU Mingwei;FENG Chao;ZHU Rong;GAO Yang;WANG Tianzuo;LIU Lei;Institute for Carbon Neutrality,University of Science and Technology Beijing;Institute of Steel Sustainable Technology,Liaoning Academy of Materials;State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing;National Energy Conservation Center;China Machinery Industry Environmental Protection Development Center;Energy Efficiency and Investment Evaluation Professional Committee of China Energy Research Society;

【机构】 北京科技大学碳中和研究院； 辽宁材料实验室钢铁再生技术研究所； 北京科技大学绿色低碳钢铁冶金全国重点实验室； 国家节能中心； 机械工业环保产业发展中心； 中国能源研究会能效与投资评估专业委员会；

【摘要】 在全球碳中和战略背景下,钢铁冶金行业作为重点碳排放领域,亟须开发创新性低碳技术。本文系统阐述了CO₂在钢铁全流程中的创新应用模式,涵盖高炉炼铁、转炉/电炉炼钢及精炼工序。研究表明:高炉喷吹CO₂可提升煤粉燃烧效率12.3%,降低焦比1.8%;转炉底吹CO₂使熔池搅拌能效提升209%,终点[P]≤0.006%;电弧炉应用CO₂技术实现吨钢粉尘减排2.67kg,氮含量降低35%;精炼工序采用CO₂替代Ar气,夹杂物去除率提升18.6%。通过构建"CO₂-冶金反应-产物回用"的闭路循环体系,形成吨钢CO₂减排23.12kg的技术路径,为钢铁工业低碳转型提供重要技术支撑。更多还原

【Abstract】 In the context of the global carbon neutrality strategy,the steel metallurgy industry,as a key sector of carbon emissions,urgently needs to develop innovative low-carbon technologies.This paper systematically elaborates on the innovative applications of CO₂ throughout the entire steelmaking process,covering blast furnace ironmaking,converter/electric arc furnace steelmaking,and refining processes.The research shows that:injecting CO₂ into the blast furnace can increase coal powder combustion efficiency by 12.3% and reduce coke ratio by 1.8%;bottom-blowing CO₂ into the converter can enhance molten pool stirring efficiency by 209%,with a phosphorus content of ≤0.006%;applying CO₂ technology in the electric arc furnace reduces dust emissions by 2.67 kg per ton of steel and lowers nitrogen content by 35%;in the refining process,replacing argon with CO₂ improves the inclusion removal rate by 18.6%.By constructing a closed-loop system of "CO₂-metalurgical reaction-product reuse," a technical path is formed that reduces CO₂ emissions by 23.12 kg per ton of steel,providing important technical support for the low-carbon transformation of the steel industry.更多还原