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

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International Journal of Minerals, Metallurgy and Materials Aims and scope Submit manuscript

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.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51904063), the Science and Technology Plan Project of Liaoning Province, China (No. 2022JH24/10200027), the Key Research and Development Project of Hebei Province, China (No. 2131 4001D), and the seventh batch of the Ten Thousand Talents Plan (No. ZX20220553).

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, 110819, China

    Jinge Feng, Jue Tang & Zichuan Zhao

  2. Institute for Frontier Technologies of Low-carbon Steelmaking, Northeastern University, Shenyang, 110819, China

    Jinge Feng & Zichuan Zhao

  3. Liaoning Low-carbon Steelmaking Technology Engineering Research Center, Northeastern University, Shenyang, 110819, China

    Jinge Feng, Zichuan Zhao & Mansheng Chu

  4. Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking (Ministry of Education), Shenyang, 110819, China

    Jue Tang & Mansheng Chu

  5. Zhang Xuan Technology of HBIS Group Co., Ltd., Shijiazhuang, 050000, China

    Aijun Zheng

  6. Xuanhua Iron and Steel Group Co., Ltd., Shijiazhuang, 050000, China

    Xiaobing Li

  7. Iron and Steel Research Institute of HBIS Group Co., Ltd., Shijiazhuang, 050000, China

    Xiao’ai Wang

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  1. Jinge Feng
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Correspondence to Jue Tang.

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Mansheng Chu is an editorial board member for this journal and was not involved in the editorial review or the decision to publish this article. All authors declare that there are no competing interests.

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Feng, J., Tang, J., Zhao, Z. et al. 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, 282–291 (2024). https://doi.org/10.1007/s12613-023-2730-6

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  • DOI: https://doi.org/10.1007/s12613-023-2730-6

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