Impact of CO2 as an oxidant on the decarburization and chromium retention and an approach for CO2 recycling

doi:10.1016/j.cjche.2024.09.019

中国化学工程学报 ›› 2025, Vol. 77 ›› Issue (1): 203-206.DOI: 10.1016/j.cjche.2024.09.019

Impact of CO₂ as an oxidant on the decarburization and chromium retention and an approach for CO₂ recycling

Yun Zhou¹, Wenzhi Xia¹, Guangsheng Wei^2,3, Haichuan Wang¹

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

收稿日期:2024-05-12 修回日期:2024-09-04 接受日期:2024-09-05 出版日期:2025-01-28 发布日期:2024-10-24
通讯作者: Guangsheng Wei,E-mail:wgshsteel@126.com;Haichuan Wang,E-mail:which@ahut.edu.cn
基金资助:
This work was 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), and the China Postdoctoral Science Foundation (2024M750013).

Impact of CO₂ as an oxidant on the decarburization and chromium retention and an approach for CO₂ recycling

Yun Zhou¹, Wenzhi Xia¹, Guangsheng Wei^2,3, Haichuan Wang¹

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

Received:2024-05-12 Revised:2024-09-04 Accepted:2024-09-05 Online:2025-01-28 Published:2024-10-24
Contact: Guangsheng Wei,E-mail:wgshsteel@126.com;Haichuan Wang,E-mail:which@ahut.edu.cn
Supported by:
This work was 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), and the China Postdoctoral Science Foundation (2024M750013).

摘要/Abstract

摘要： This study explores the unique role of CO₂ 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 CO₂ increases the CO partial pressure in the reaction system, the decarburization and chromium (Cr) retention capabilities of CO₂ 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 CO₂ recovery and utilization approach is proposed, integrating CO₂ capture from smelting flue gas and recycling it for smelting, reducing O₂ 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

Abstract: This study explores the unique role of CO₂ 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 CO₂ increases the CO partial pressure in the reaction system, the decarburization and chromium (Cr) retention capabilities of CO₂ 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 CO₂ recovery and utilization approach is proposed, integrating CO₂ capture from smelting flue gas and recycling it for smelting, reducing O₂ 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.

Key words: Carbon dioxide, Oxidation, Decarburization, Chromium retention, Chemical reaction, Stainless steel smelting

Yun Zhou, Wenzhi Xia, Guangsheng Wei, Haichuan Wang. Impact of CO₂ as an oxidant on the decarburization and chromium retention and an approach for CO₂ recycling[J]. 中国化学工程学报, 2025, 77(1): 203-206.

Yun Zhou, Wenzhi Xia, Guangsheng Wei, Haichuan Wang. Impact of CO₂ as an oxidant on the decarburization and chromium retention and an approach for CO₂ recycling[J]. Chinese Journal of Chemical Engineering, 2025, 77(1): 203-206.

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Impact of CO₂ as an oxidant on the decarburization and chromium retention and an approach for CO₂ recycling

Impact of CO₂ as an oxidant on the decarburization and chromium retention and an approach for CO₂ recycling

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