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Deformation Characteristics and Influential Parameters of Iron Coke Hot Briquette During Carbonization Process

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Abstract

Iron coke hot briquette (ICHB) is considered as a typical low-carbon ironmaking charge. Much research has been done on its properties including strength, reactivity and post-reaction strength. However, the properties of ICHB in the carbonization process are also very important, which can affect the choice of reactor and the quality of the product. This paper complements the theory of ICHB during the carbonization process. ICHB was prepared with 20 pct iron ore A (referred to as ICHB-A) and iron ore B (referred to as ICHB-B) to study the effect of the reduction process of iron oxide on the deformation ratio and compressive strength of ICHB during carbonization. The main component of iron ore A is Fe3O4 and that of iron ore B is Fe2O3. The results show that Fe2O3 in ICHB-B is reduced at about 500 °C, and more gas is generated to inhibit the contraction of ICHB. However, the compressive strength of ICHB-B during carbonization is higher than that of ICHB-A, which is believed to be related to the closer bonding between hematite and coal. This study also compared the effect of the ratio of iron ore A on ICHB deformation ratio and compressive strength. The results show that the expansion ratio and shrinkage ratio of ICHB decrease with the increase of iron ore A ratio. By analyzing the deformation characteristics of briquette with the same proportion of Al2O3 during carbonization, it is considered that the influence of different proportion of iron ore A on ICHB deformation ration is mainly caused by the inhibition of inert material on the deformation behavior of coal. The iron ore can enhance the compressive strength of coke, but the reinforcing effect decreases with the increase of iron ore ratio. In addition, the influences of carbonization heating rate, forming pressure and particle size of iron ore on ICHB deformation behavior are also included in this study.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China-Liaoning Joint Funds (U1808212), the National Natural Science Foundation of China (52074080), the Fundamental Research Funds of the Central Universities of China (N182504010) and Xingliao Talent Plan (XLYC1902118).

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The authors declare that they have no conflict of interest.

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Authors and Affiliations

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

    Dong Han, Zhenggen Liu, Jiwei Bao, Mingyu Wang & Laigeng Cao

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

    Dong Han, Zhenggen Liu, Jiwei Bao, Mingyu Wang & Laigeng Cao

  3. Liaoning Province Engineering Research Center for Technologies of Low-Carbon Steelmaking, Shenyang, 110819, P.R. China

    Dong Han, Zhenggen Liu, Jiwei Bao, Mingyu Wang & Laigeng Cao

  4. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, P.R. China

    Mansheng Chu

  5. Institute for Energy and Environment, Baosteel Central Research Institute, Shanghai, 200000, P.R. China

    Yongjie Zhang

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  1. Dong Han
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Han, D., Liu, Z., Chu, M. et al. Deformation Characteristics and Influential Parameters of Iron Coke Hot Briquette During Carbonization Process. Metall Mater Trans B 53, 1631–1643 (2022). https://doi.org/10.1007/s11663-022-02473-x

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  • DOI: https://doi.org/10.1007/s11663-022-02473-x

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