Li, Y., Ren, J., Wei, H., Khan, I.U., Omran, M., Fabritius, T., Shu, Q., Wang, C., Zang, Y. and Yu, Y. (2023), Reduction Kinetics of Cold-Bonded Briquette Prepared from Return Fines of Sinter with Carbon Monoxide and Coke. steel research int., 94: 2300057. https://doi.org/10.1002/srin.202300057
Reduction kinetics of cold-bonded briquette prepared from return fines of sinter with carbon monoxide and coke
|Author:||Li, Ying1; Ren, Jie1; Wei, Han1;|
1State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, 99 Shangda Rd, Shanghai, 200444 China
2Process Metallurgy Research Group, Faculty of Technology, University of Oulu, 90014 Oulu, Finland
3Department of Process Metallurgy, Swerim AB, SE-971 25 Lulea, Sweden
4Material Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
5School of Materials and Metallurgy, Guizhou University, Guiyang, 550025 China
6Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Process Saving, Guiyang, 550025 China
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe20230914125901
John Wiley & Sons,
|Publish Date:|| 2024-08-01
The reduction kinetics of cold-bonded briquette prepared from return fines of sinter is studied. The results reveal that cold-bonded briquettes with coke (CBBC) have a higher reduction velocity index (RVI) value than cold-bonded briquettes without coke (CBB). Interfacial chemical reaction controls the early stages of the CBB reduction process at 900 and 950 °C, followed by both interfacial chemical reaction and internal diffusion. At 1000, 1050, and 1100 °C, the early and final stages of the CBB reduction process are controlled by interfacial chemical reaction and internal diffusion, respectively, while both interfacial chemical reaction and internal diffusion control middle stage. The apparent activation energies of the different stages are 46.20, 56.74, 38.24, and 40.74 kJ mol⁻¹, respectively. The gasification of carbon reaction controls the reduction process of CBBC, and the apparent activation energy is 32.42 kJ mol⁻¹. According to the Friedman method, the apparent activation energy of CBB and CBBC is reasonable. Coke promotes the phase transformation in CBBC. Scanning electron microscopy results show that the CBBC sample is more fully reduced than the CBB sample and that it has smoother corners and edges of the iron-bearing phase or the metallic iron phase than the CBB sample.
Steel research international
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
This work was supported by China Scholarship Council under grant no. 202106890046, the National Natural Science Foundation of China under grant no. 51974182, Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning under grant no. TP2015039, National 111 Project (The Program of Introducing Talents of Discipline to University), under grant no. D17002, Independent Research Project of State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of advanced Ferrometallurgy, Shanghai University (SKLASS 2022-Z01), the Science and Technology Commission of Shanghai Municipality, under grant no. 19DZ2270200, and China Baowu Low Carbon Metallurgy Innovation Foudation-BWLCF202112.
© 2023 Wiley-VCH GmbH. This is the peer reviewed version of the following article: Li, Y., Ren, J., Wei, H., Khan, I.U., Omran, M., Fabritius, T., Shu, Q., Wang, C., Zang, Y. and Yu, Y. (2023), Reduction Kinetics of Cold-Bonded Briquette Prepared from Return Fines of Sinter with Carbon Monoxide and Coke. steel research int., 94: 2300057, which has been published in final form at https://doi.org/10.1002/srin.202300057. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.