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 i...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.展开更多
The blast furnace ironmaking process is a crucial step in the steel industry.Effectively modelling the blast furnaces is significant in ensuring smooth operation and accelerating the digitalisation transformation of b...The blast furnace ironmaking process is a crucial step in the steel industry.Effectively modelling the blast furnaces is significant in ensuring smooth operation and accelerating the digitalisation transformation of blast furnaces.The authors focus on the mechanism modelling of the blast furnace operation process,using a digital twin model development platform to simulate the main reaction processes inside the blast furnaces.Under on-site production conditions,Si,Mn and Ti contents of molten iron and the corresponding indicators for model accuracy are calculated.For Si,Mn,and Ti content,the Root Mean Square Error values are 0.0678,0.0108 and 0.0093 for dataset 1,while 0.0933,0.0120 and 0.0111 for dataset 2,respectively,indicating that the model has a small simulation error and high accuracy.By comparing the simulation results with accurate laboratory results,the model is validated to have satisfactory simulation reliability and compensates for the existing shortcomings in the blast furnace mechanism modelling field.展开更多
As the first step of mine production, blasting has a vital influence on the safety and smoothness of mine production, the correctness and quality of blade filling and transportation operation, as well as the mine prod...As the first step of mine production, blasting has a vital influence on the safety and smoothness of mine production, the correctness and quality of blade filling and transportation operation, as well as the mine production efficiency. Considering that the effective reduction of detonation velocity and depth is an important scientific research project in the mining industry, given the close relationship between high detonation velocity on the one hand and the size of the base and the quality of the explosion on the other, there are many factors in the process of exposed wing blasting, which lead to the formation of root block and deep block. The related factors of the large block and deep block need to be studied more deeply, effectively and scientifically.展开更多
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)。
文摘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.
基金National Natural Science Foundation of China,Grant/Award Numbers:61933015,62394341Postdoctoral Fellowship Program of CPSF,Grant/Award Number:GZC20232288。
文摘The blast furnace ironmaking process is a crucial step in the steel industry.Effectively modelling the blast furnaces is significant in ensuring smooth operation and accelerating the digitalisation transformation of blast furnaces.The authors focus on the mechanism modelling of the blast furnace operation process,using a digital twin model development platform to simulate the main reaction processes inside the blast furnaces.Under on-site production conditions,Si,Mn and Ti contents of molten iron and the corresponding indicators for model accuracy are calculated.For Si,Mn,and Ti content,the Root Mean Square Error values are 0.0678,0.0108 and 0.0093 for dataset 1,while 0.0933,0.0120 and 0.0111 for dataset 2,respectively,indicating that the model has a small simulation error and high accuracy.By comparing the simulation results with accurate laboratory results,the model is validated to have satisfactory simulation reliability and compensates for the existing shortcomings in the blast furnace mechanism modelling field.
文摘As the first step of mine production, blasting has a vital influence on the safety and smoothness of mine production, the correctness and quality of blade filling and transportation operation, as well as the mine production efficiency. Considering that the effective reduction of detonation velocity and depth is an important scientific research project in the mining industry, given the close relationship between high detonation velocity on the one hand and the size of the base and the quality of the explosion on the other, there are many factors in the process of exposed wing blasting, which lead to the formation of root block and deep block. The related factors of the large block and deep block need to be studied more deeply, effectively and scientifically.
