Effect of titanium on the sticking of pellets based on hydrogen metallurgy shaft furnace: Behavior analysis and mechanism evolution

Jinge Feng; Jue Tang; Zichuan Zhao; Mansheng Chu; Aijun Zheng; Xiaobing Li; Xiao’ai Wang

doi:10.1007/s12613-023-2730-6

Volume 31 Issue 2

Feb. 2024

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2024 > 31(2): 282-291

Jinge Feng, Jue Tang, Zichuan Zhao, Mansheng Chu, Aijun Zheng, Xiaobing Li, and Xiao’ai Wang, Effect of titanium on the sticking of pellets based on hydrogen metallurgy shaft furnace: Behavior analysis and mechanism evolution, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 282-291. https://doi.org/10.1007/s12613-023-2730-6

Cite this article as:

Jinge Feng, Jue Tang, Zichuan Zhao, Mansheng Chu, Aijun Zheng, Xiaobing Li, and Xiao’ai Wang, Effect of titanium on the sticking of pellets based on hydrogen metallurgy shaft furnace: Behavior analysis and mechanism evolution, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 282-291. https://doi.org/10.1007/s12613-023-2730-6

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Research Article

Effect of titanium on the sticking of pellets based on hydrogen metallurgy shaft furnace: Behavior analysis and mechanism evolution

+ Author Affiliations

1)
School of Metallurgy, Northeastern University, Shenyang 110819, China
2)
Institute for Frontier Technologies of Low-carbon Steelmaking, Northeastern University, Shenyang 110819, China
3)
Liaoning Low-carbon Steelmaking Technology Engineering Research Center, Northeastern University, Shenyang 110819, China
4)
Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking (Ministry of Education), Shenyang 110819, China
5)
Zhang Xuan Technology of HBIS Group Co., Ltd., Shijiazhuang 050000, China
6)
Xuanhua Iron and Steel Group Co., Ltd., Shijiazhuang 050000, China
7)
Iron and Steel Research Institute of HBIS Group Co., Ltd., Shijiazhuang 050000, China

Corresponding author:
Jue Tang E-mail: tangj@smm.neu.edu.cn
Received: 17 June 2023; Revised: 12 August 2023; Accepted: 16 August 2023; Available online: 18 August 2023

Abstract

Abstract

Direct reduction based on hydrogen metallurgical gas-based shaft furnace is a promising technology for the efficient and low-carbon smelting of vanadium–titanium magnetite. However, in this process, the sticking of pellets occurs due to the aggregation of metallic iron between the contact surfaces of adjacent pellets and has a serious negative effect on the continuous operation. This paper presents a detailed experimental study of the effect of TiO₂ on the sticking behavior of pellets during direct reduction under different conditions. Results showed that the sticking index (SI) decreased linearly with the increasing TiO₂ addition. This phenomenon can be attributed to the increase in unreduced FeTiO₃ during reduction, leading to a decrease in the number and strength of metallic iron interconnections at the sticking interface. When the TiO₂ addition amount was raised from 0 to 15wt% at 1100°C, the SI also increased from 0.71% to 59.91%. The connection of the slag phase could be attributed to the sticking at a low reduction temperature, corresponding to the low sticking strength. Moreover, the interconnection of metallic iron became the dominant factor, and the SI increased sharply with the increase in reduction temperature. TiO₂ had a greater effect on SI at a high reduction temperature than at a low reduction temperature.
- titanium;
- sticking index;
- hydrogen metallurgy;
- direct reduction;
- pellets

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