Impact of CO_(2)as an oxidant on the decarburization and chromium retention and an approach for CO_(2)recycling  

作　　者：Yun Zhou Wenzhi Xia Guangsheng Wei Haichuan Wang 

机构地区：[1]School of Metallurgical Engineering,Anhui University of Technology,Maanshan 243032,China [2]Institute for Carbon Neutrality,University of Science and Technology Beijing,Beijing 100083,China [3]Liaoning Academy of Materials,Shenyang 110000,China

出　　处：《Chinese Journal of Chemical Engineering》2025年第1期203-206,共4页中国化学工程学报(英文版)

基　　金：supported by the Postdoctoral Fellowship Program of CPSF(GZC20230017);the Natural Science Research Project of Anhui Educational Committee(2024AH050153);the National Natural Science Foundation of China(52322407,52274313);the China Postdoctoral Science Foundation(2024M750013).

摘　　要：This study explores the unique role of CO_(2)as an oxidant in stainless steel smelting,focusing on its effectiveness in decarbonization and chromium retention.The research begins by theoretically demonstrating that although the introduction of CO_(2)increases the CO partial pressure in the reaction system,the decarburization and chromium(Cr)retention capabilities of CO_(2)can still be stably maintained through the rational adjustment of the molten steel composition,temperature,and inert gas proportions.Further experimental findings indicate that chromium does not exhibit significant oxidation losses when the carbon(C)content exceeds 1.0%(mass).Finally,a novel CO_(2)recovery and utilization approach is proposed,integrating CO_(2)capture from smelting flue gas and recycling it for smelting,reducing O_(2)consumption and energy costs.This innovative process,compatible with existing smelting plants,presents a promising pathway towards carbon neutrality in the iron and steel industry,bridging theoretical insights with practical applications.

关 键 词：Carbon dioxide Oxidation DECARBURIZATION Chromium retention Chemical reaction Stainless steel smelting 

分 类 号：TG1[金属学及工艺—金属学]