典型钢铁制造流程碳排放及碳中和实施路径  

Analysis of carbon emissions in typical iron-and steelmaking process and implementation path research of carbon neutrality

作　　者：张琦[1,2,3] 沈佳林[1] 籍杨梅 ZHANG Qi;SHEN Jia-lin;JI Yang-mei(State Environment Protection Key Laboratory of Eco-Industry,Northeastern University,Shenyang 110819,Liaoning,China;Institute for Frontier Technologies of Low-Carbon Steelmaking,Northeastern University,Shenyang 110819,Liaoning,China;Engineering Research Center of Ministry of Education for Frontier Technologies of Low-Carbon Steelmaking,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学国家环境保护生态工业重点实验室,辽宁沈阳110819 [2]东北大学低碳钢铁前沿技术研究院,辽宁沈阳110819 [3]低碳钢铁前沿技术教育部工程研究中心,辽宁沈阳110819

出　　处：《钢铁》2023年第2期173-187,共15页Iron and Steel

基　　金：“兴辽英才计划”资助项目(XLYC2002072);中央高校基本科研业务费资助项目(N2225047)。

摘　　要：高炉-转炉钢铁生产流程是典型的钢铁制造流程,也是典型的铁-煤化工过程,能耗高、碳排放量大,是中国钢铁行业实现碳中和目标的重点领域。2020年,由该流程生产的钢产量占全国粗钢产量的90%以上,是钢铁行业重要的CO_(2)排放源,因此,以典型高炉-转炉钢铁流程为主的企业碳排放计算和碳中和路径研究引起重视。目前国内外有多种针对钢铁企业碳排放的计算方法,但不同CO_(2)计算边界和方法对企业CO_(2)排放结果差异较大,影响因素也不同。剖析了钢铁生产流程的碳排放特征,以典型高炉-转炉制造流程为例,从系统边界、碳排放核算方法以及影响因素等角度全方位分析了钢铁制造流程碳排放,核算了不同方法下390万t和550万t钢铁企业的碳排放量,并对比了不同核算方法的差异性。结果表明,A企业和B企业铁前工序的CO_(2)排放占总碳排放的比例分别为60.99%和54.12%,减少钢铁制造流程CO_(2)排放应优先考虑焦化、烧结和炼铁工序;影响钢铁制造流程减排的因素主要包括化石燃料的消耗、能源的回收率、自发电的比例和碳排放因子的选取,其中化石燃料的消耗是钢铁制造流程中最大的CO_(2)排放源,消耗产生的CO_(2)排放占总碳排放的80%以上。同时,以钢铁全流程碳中和为目标,分析了不同降碳技术、措施的应用效果和减碳路径,以期为钢铁企业实现碳达峰碳中和目标提供实施依据,为企业制定碳中和路线图和行动方案提供有用参考。The blast furnace-blast oxygen furnace(BF-BOF)steel production process is a typical iron and steel process,and also is typical iron-coal chemical process with high energy consumption and large carbon emissions,which is in a key area for Chinese iron and steel industry to achieve the goal of carbon neutrality.In 2020,the production of steel produced by this process accounted for over 90%of the national crude steel production,and the BF-BOF steel process is an important source of CO_(2)emissions in the iron and steel industry.Therefore,the carbon emission calculation and carbon neutralization path research of companies based on the typical BF-BOF steel process has attracted attention.At present,there are a variety of calculation methods for carbon emissions of iron and steel companies at home and abroad,but different CO_(2)calculation boundaries and methods have great differences in the results of companies′CO_(2)emissions,and the influencing factors are also different.The carbon emission characteristics of the steel production process are introduced.Taking a typical production process as an example,it analyzes the carbon emission,carbon emission accounting methods,and influencing factors of the whole steel process from the perspective of system boundary,and calculates the carbon emissions of 3.9 million tons and 5.5 million tons of iron and steel companies under different methods,and compares the differences between different calculation methods.The results show that the proportion of CO_(2)emissions in the pre-iron process of company A and company B to the total carbon emissions is 60.99%and 54.12%,respectively.Coking,sintering and ironmaking processes should be given priority to reduce CO_(2)emissions in the iron-and steelmaking process.The factors affecting the emission reduction in the iron-and steelmaking process mainly include the consumption of fossil fuels,the recovery rate of energy,the proportion of self-generated electricity and the selection of carbon emission factors.Among them,the consumption of fo

关 键 词：钢铁生产流程 CO_(2)排放 节能 低碳技术 碳中和 

分 类 号：TF089[冶金工程—冶金物理化学]