Role of iron ore in enhancing gasification of iron coke: Structural evolution, influence mechanism and kinetic analysis

Jie Wang; Wei Wang; Xuheng Chen; Junfang Bao; Qiuyue Hao; Heng Zheng; Runsheng Xu

doi:10.1007/s12613-024-2873-0

Volume 32 Issue 1

Jan. 2025

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2025 > 32(1): 58-69

Jie Wang, Wei Wang, Xuheng Chen, Junfang Bao, Qiuyue Hao, Heng Zheng, and Runsheng Xu, Role of iron ore in enhancing gasification of iron coke: Structural evolution, influence mechanism and kinetic analysis, Int. J. Miner. Metall. Mater., 32(2025), No. 1, pp. 58-69. https://doi.org/10.1007/s12613-024-2873-0

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Jie Wang, Wei Wang, Xuheng Chen, Junfang Bao, Qiuyue Hao, Heng Zheng, and Runsheng Xu, Role of iron ore in enhancing gasification of iron coke: Structural evolution, influence mechanism and kinetic analysis, Int. J. Miner. Metall. Mater., 32(2025), No. 1, pp. 58-69. https://doi.org/10.1007/s12613-024-2873-0

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Research Article

Role of iron ore in enhancing gasification of iron coke: Structural evolution, influence mechanism and kinetic analysis

+ Author Affiliations

Corresponding authors:
Xuheng Chen E-mail: chenxuheng0627@163.com

Runsheng Xu E-mail: xurunsheng@ustb.edu.cn
Received: 8 January 2024; Revised: 29 February 2024; Accepted: 5 March 2024; Available online: 7 March 2024

Abstract

Abstract

The utilization of iron coke provides a green pathway for low-carbon ironmaking. To uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification, the effect of iron ore on the microstructure of iron coke was investigated. Furthermore, a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric method. The findings indicate that compared to coke, iron coke exhibits an augmentation in micropores and specific surface area, and the micropores further extend and interconnect. This provides more adsorption sites for CO₂ molecules during the gasification process, resulting in a reduction in the initial gasification temperature of iron coke. Accelerating the heating rate in non-isothermal gasification can enhance the reactivity of iron coke. The metallic iron reduced from iron ore is embedded in the carbon matrix, reducing the orderliness of the carbon structure, which is primarily responsible for the heightened reactivity of the carbon atoms. The kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore structure. Moreover, as the proportion of iron ore increases, the activation energy for the carbon gasification gradually decreases, from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.
- low-carbon ironmaking;
- iron coke;
- gasification;
- structural evolution;
- kinetic model

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