Development of CO_(2) capture and utilization technology in steelmaking plant  

作　　者：Wen-liang Dong Guo-hui Ding An-jun Xu Ning Hao Chen-xi Ji Li-peng Ji Hai-bo Li Rong Zhu 

机构地区：[1]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing,100083,China [2]Research Institute of Technology,Shougang Group Co.,Ltd.,Beijing,100043,China [3]Steelmaking Department,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan,063200,Hebei,China

出　　处：《Journal of Iron and Steel Research International》2023年第11期2210-2218,共9页

摘　　要：The performance of a recycling process for CO_(2) capture and utilization of exhaust gas in the steelmaking plant was reported.A facility capable of capturing CO_(2) at 3200 m^(3)/h was established in the steelmaking plant,resulting in the CO_(2) production of 50,000 t/a.The CO_(2) concentration of the exhaust gas from the lime kiln increased from 25.0 to 99.8 vol.%using the comprehensive method of the pressure swing adsorption and cryogenic separation.The captured and purified CO_(2) was successfully applied in the converter process by the top blowing and bottom blowing.The utilization of CO_(2) was 3.5 m^(3)/t through these two modes.After optimizing parameters of CO_(2)-O_(2) mixed top blowing,the value of[C]×[O]and the content of TFe in slag were reduced by 1.33×10-4 and 1.27%,respectively,and the dephosphorization rate of the molten steel increased by 2.31%.For the CO_(2) bottom blowing,the[N]content in the molten steel was significantly reduced by 5.7×10^(-6).

关 键 词：Lime kiln exhaust gas CO_(2)capture CO_(2)utilization CO_(2)-O_(2)mixed top blowing CO_(2)bottom blowing Converter 

分 类 号：TG142[一般工业技术—材料科学与工程]