Hongyu Tian, Deqing Zhu, Jian Pan, Congcong Yang, Weiqun Huang, and Mansheng Chu, Effect mechanism of aluminum occurrence and content on the induration characteristics of iron ore pellets, Int. J. Miner. Metall. Mater., 30(2023), No. 12, pp. 2334-2346. https://doi.org/10.1007/s12613-023-2725-3
Cite this article as:
Hongyu Tian, Deqing Zhu, Jian Pan, Congcong Yang, Weiqun Huang, and Mansheng Chu, Effect mechanism of aluminum occurrence and content on the induration characteristics of iron ore pellets, Int. J. Miner. Metall. Mater., 30(2023), No. 12, pp. 2334-2346. https://doi.org/10.1007/s12613-023-2725-3
Research Article

Effect mechanism of aluminum occurrence and content on the induration characteristics of iron ore pellets

+ Author Affiliations
  • Corresponding author:

    Congcong Yang    E-mail: smartyoung@csu.edu.cn

  • Received: 31 March 2023Revised: 20 July 2023Accepted: 11 August 2023Available online: 18 August 2023
  • With the intensified depletion of high-grade iron ores, the increased aluminum content in iron ore concentrates has become unavoidable, which is detrimental to the pelletization process. Therefore, the effect mechanism of aluminum on pellet quality must be identified. In this study, the influence of aluminum occurrence and content on the induration of hematite (H) and magnetite (M) pellets was investigated through the addition of corresponding Al-containing additives, including alumina, alumogoethite, gibbsite, and kaolinite. Systematic mineralogical analysis, combined with the thermodynamic properties of different aluminum occurrences and the quantitative characterization of consolidation behaviors, were conducted to determine the related mechanism. The results showed that the alumina from various aluminum occurrences adversely affected the induration characteristics of pellets, especially at an aluminum content of more than 2.0wt%. The thermal decomposition of gibbsite and kaolinite tends to generate internal stress and fine cracks, which hinder the respective microcrystalline bonding and recrystallization between Fe2O3 particles. The adverse effect on the induration characteristics of fired pellets with different aluminum occurrences can be relieved to varying degrees through the formation of liquid phase bonds between the hematite particles. Kaolinite is more beneficial to the induration process than the other three aluminum occurrences because of the formation of more liquid phase, which improves pellet consolidation. The research results can further provide insights into the effect of aluminum occurrence and content in iron ore concentrates on downstream processing and serve as a guide for the utilization of high-alumina iron ore concentrates in pelletization.
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  • [1]
    C. Wang, C.Y. Xu, Z.J. Liu, Y.Z. Wang, R.R. Wang, and L.M. Ma, Effect of organic binders on the activation and properties of indurated magnetite pellets, Int. J. Miner. Metall. Mater., 28(2021), No. 7, p. 1145. doi: 10.1007/s12613-020-2055-7
    [2]
    D.Q. Zhu, W.Q. Huang, C.C. Yang, X. Hu, and J. Pan, Technical progress in iron ore pelletization, Sintering and Pelletizing, 42(2017), No. 3, p. 42.
    [3]
    T. Jiang, Y.B. Zhang, Z.C. Huang, G.H. Li, and X.H. Fan, Preheating and roasting characteristics of hematite–magnetite (H–M) concentrate pellets, Ironmaking Steelmaking, 35(2008), No. 1, p. 21. doi: 10.1179/174328107X174771
    [4]
    F. Zhang, D.Q. Zhu, J. Pan, Z.Q. Guo, and M.J. Xu, Improving roasting performance and consolidation of pellets made of ultrafine and super-high-grade magnetite concentrates by modifying basicity, J. Iron Steel Res. Int., 27(2020), No. 7, p. 770. doi: 10.1007/s42243-020-00388-y
    [5]
    D.Q. Zhu, F. Zhang, Z.Q. Guo, J. Pan, and W. Yu, Grate-kiln pelletization of Indian hematite fines and its industrial practice, Int. J. Miner. Metall. Mater., 24(2017), No. 5, p. 473. doi: 10.1007/s12613-017-1428-z
    [6]
    A.B. Kotta, A. Patra, M. Kumar, and S.K. Karak, Effect of molasses binder on the physical and mechanical properties of iron ore pellets, Int. J. Miner. Metall. Mater., 26(2019), No. 1, p. 41. doi: 10.1007/s12613-019-1708-x
    [7]
    J.J. Dong, G. Wang, Y.G. Gong, Q.G. Xue, and J.S. Wang, Effect of high alumina iron ore of gibbsite type on sintering performance, Ironmaking Steelmaking, 42(2015), No. 1, p. 34. doi: 10.1179/1743281214Y.0000000195
    [8]
    G.H. Li, M.D. Liu, T. Jiang, T.H. Zhou, and X.H. Fan, Mineralogy characteristics and separation of aluminum and iron of high-aluminum iron ores, J. Cent. South Univ. Sci. Technol., 40(2009), No. 5, p. 1165.
    [9]
    S.W. Kim, J.W. Jeon, I.K. Suh, and S.M. Jung, Improvement of sintering characteristics by selective granulation of high Al2O3 iron ores and ultrafine iron ores, Ironmaking Steelmaking, 43(2016), No. 7, p. 500. doi: 10.1080/03019233.2015.1109293
    [10]
    H. Sahoo, S.S. Rath, D.S. Rao, B.K. Mishra, and B. Das, Role of silica and alumina content in the flotation of iron ores, Int. J. Miner. Process., 148(2016), p. 83. doi: 10.1016/j.minpro.2016.01.021
    [11]
    A.B. Kotta, D. Narsimhachary, S.K. Karak, and M. Kumar, Studies on the mechanical and physical properties of hematite iron ore pellets prepared under different conditions, Trans. Indian Inst. Met., 73(2020), No. 10, p. 2561. doi: 10.1007/s12666-020-02061-0
    [12]
    A. Ghosh, B. Nayak, T.K. Das, and S. Palit Sagar, A non-invasive technique for sorting of alumina-rich iron ores, Miner. Eng., 45(2013), p. 55. doi: 10.1016/j.mineng.2012.12.004
    [13]
    G.H. Li, T. Jiang, M.D. Liu, T.H. Zhou, X.H. Fan, and G.Z. Qiu, Beneficiation of high-aluminium-content hematite ore by soda ash roasting, Miner. Process. Extr. Metall. Rev., 31(2010), No. 3, p. 150. doi: 10.1080/08827501003727030
    [14]
    X.G. Hu, H.Y. Zheng, Y.C. Guo, X. Jiang, Q.J. Gao, and F.M. Shen, Determination of Al2O3 activity by reference slag method in CaO–SiO2–Al2O3–MgO melts for blast furnace slag with high Al2O3 at 1873 K, Steel Res. Int., 91(2020), No. 3, art. No. 1900285. doi: 10.1002/srin.201900285
    [15]
    T. Murakami, S. Nakamura, D. Maruoka, and E. Kasai, Effects of iron ore type and gangue mineral components on strength of sintered fine powder granule, Tetsu-to-Hagane, 107(2021), No. 6, p. 463. doi: 10.2355/tetsutohagane.TETSU-2020-061
    [16]
    Y.F. Chai, W.T. Yu, J.L. Zhang, S.L. An, J. Peng, and Y.Z. Wang, Influencing mechanism of Al2O3 on sintered liquid phase of iron ore fines based on thermal and kinetic analysis, Ironmaking Steelmaking, 46(2019), No. 5, p. 424. doi: 10.1080/03019233.2018.1503629
    [17]
    N.A.S. Webster, D.P. O’dea, B.G. Ellis, and M.I. Pownceby, Effects of gibbsite, kaolinite and Al-rich goethite as alumina sources on silico-ferrite of calcium and aluminium (SFCA) and SFCA-I iron ore sinter bonding phase formation, ISIJ Int., 57(2017), No. 1, p. 41. doi: 10.2355/isijinternational.ISIJINT-2016-332
    [18]
    J.L. Zhang, Z.Y. Wang, X.D. Xing, and Z.J. Liu, Effect of aluminum oxide on the compressive strength of pellets, Int. J. Miner. Metall. Mater., 21(2014), No. 4, p. 339. doi: 10.1007/s12613-014-0914-9
    [19]
    F.M. Shen, Q.J. Gao, X. Jiang, G. Wei, and H.Y. Zheng, Effect of magnesia on the compressive strength of pellets, Int. J. Miner. Metall. Mater., 21(2014), No. 5, p. 431. doi: 10.1007/s12613-014-0926-5
    [20]
    X.B. Li, H.Y. Wang, Q.S. Zhou, et al., Reaction behavior of kaolinite with ferric oxide during reduction roasting, Trans. Nonferrous Met. Soc. China, 29(2019), No. 1, p. 186. doi: 10.1016/S1003-6326(18)64927-1
    [21]
    Y.H. Guo, J. Xie, J.J. Gao, H.J. Xu, and J.M. Qie, Study on the production and metallurgical properties of fluxed pellets with high hematite content, Metallurgist, 61(2017), No. 7-8, p. 638. doi: 10.1007/s11015-017-0545-2
    [22]
    Y.X. Xue, J. Pan, D.Q. Zhu, et al., Effect of alumina occurrence on sintering performance of iron ores and its action mechanism, J. Mater. Res. Technol., 12(2021), p. 1157. doi: 10.1016/j.jmrt.2021.03.054
    [23]
    L. Lu, R.J. Holmes, and J.R. Manuel, Effects of alumina on sintering performance of hematite iron ores, ISIJ Int., 47(2007), No. 3, p. 349. doi: 10.2355/isijinternational.47.349
    [24]
    Y.Z. Wang, J. Schenk, J.L. Zhang, et al., Novel sintering indexes to evaluate and correlate the crystal characteristics and compressive strength in magnetite pellets, Powder Technol., 362(2020), p. 517. doi: 10.1016/j.powtec.2019.12.022
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