Multi-process production occurs in the iron and steel industry,supporting‘dual carbon'target:An in-depth study of CO_(2)emissions from different processes  

作　　者：Hongming Na Yuxing Yuan Tao Du Tianbao Zhang Xi Zhao Jingchao Sun Ziyang Qiu Lei Zhang 

机构地区：[1]SEP Key Laboratory of Eco-Industry,Northeastern University,Shenyang 110819,China [2]School of Metallurgy,Northeastern University,Shenyang 110819,China

出　　处：《Journal of Environmental Sciences》2024年第6期46-58,共13页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52270177);the Young Elite Scientists Sponsorship Program by CAST(No.2022QNRC001);the Key R&D Plan of Liaoning Province(No.2021JH2/10300103)。

摘　　要：Reducing CO_(2)emissions of the iron and steel industry,a typical heavy CO_(2)-emitting sector is the only way that must be passed to achieve the‘dual-carbon’goal,especially in China.In previous studies,however,it is still unknown what is the difference between blast furnace basic oxygen furnace(BF-BOF),scrap-electric furnace(scrap-EF)and hydrogen metallurgy process.The quantitative research on the key factors affecting CO_(2)emissions is insufficient There is also a lack of research on the prediction of CO_(2)emissions by adjusting industria structure.Based on material flow analysis,this study establishes carbon flow diagrams o three processes,and then analyze the key factors affecting CO_(2)emissions.CO_(2)emissions of the iron and steel industry in the future is predicted by adjusting industrial structure The results show that:(1)The CO_(2)emissions of BF-BOF,scrap-EF and hydrogen metallurgy process in a site are 1417.26,542.93 and 1166.52 kg,respectively.(2)By increasing pellet ratio in blast furnace,scrap ratio in electric furnace,etc.,can effectively reduce CO_(2)emissions(3)Reducing the crude steel output is the most effective CO_(2)reduction measure.There is still 5.15×10^(8)-6.17×10^(8) tons of CO_(2)that needs to be reduced by additional measures.

关 键 词：Blast furnace-basic oxygen furnace process Scrap-electric furnace process Hydrogen metallurgy process Carbon flow diagram Influencing factors CO_(2)emission prediction 

分 类 号：X757[环境科学与工程—环境工程]