Fluidized magnetization roasting of refractory siderite-containing iron ore via preoxidation–low-temperature reduction

Haoyan Sun; Zheng Zou; Meiju Zhang; Dong Yan

doi:10.1007/s12613-022-2576-3

Volume 30 Issue 6

Jun. 2023

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2023 > 30(6): 1057-1066

Haoyan Sun, Zheng Zou, Meiju Zhang, and Dong Yan, Fluidized magnetization roasting of refractory siderite-containing iron ore via preoxidation–low-temperature reduction, Int. J. Miner. Metall. Mater., 30(2023), No. 6, pp. 1057-1066. https://doi.org/10.1007/s12613-022-2576-3

Cite this article as:

Haoyan Sun, Zheng Zou, Meiju Zhang, and Dong Yan, Fluidized magnetization roasting of refractory siderite-containing iron ore via preoxidation–low-temperature reduction, Int. J. Miner. Metall. Mater., 30(2023), No. 6, pp. 1057-1066. https://doi.org/10.1007/s12613-022-2576-3

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Research Article

Fluidized magnetization roasting of refractory siderite-containing iron ore via preoxidation–low-temperature reduction

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Corresponding author:
Haoyan Sun E-mail: sunhaoyan@ipe.ac.cn
Received: 29 September 2022; Revised: 9 November 2022; Accepted: 24 November 2022; Available online: 25 November 2022

Abstract

Abstract

Magnetization roasting is one of the most effective way of utilizing low-grade refractory iron ore. However, the reduction roasting of siderite (FeCO₃) generates weakly magnetic wüstite, thus reducing iron recovery via weak magnetic separation. We systematically studied and proposed the fluidized preoxidation–low-temperature reduction magnetization roasting process for siderite. We found that the maghemite generated during the air oxidation roasting of siderite would be further reduced into wüstite at 500 and 550°C due to the unstable intermediate product magnetite (Fe₃O₄). Stable magnetite can be obtained through maghemite reduction only at low temperature. The optimal fluidized magnetization roasting parameters included preoxidation at 610°C for 2.5 min, followed by reduction at 450°C for 5 min. For roasted ore, weak magnetic separation yielded an iron ore concentrate grade of 62.0wt% and an iron recovery rate of 88.36%. Compared with that of conventional direct reduction magnetization roasting, the iron recovery rate of weak magnetic separation had greatly improved by 34.33%. The proposed fluidized preoxidation–low-temperature reduction magnetization roasting process can realize the efficient magnetization roasting utilization of low-grade refractory siderite-containing iron ore without wüstite generation and is unlimited by the proportion of siderite and hematite in iron ore.
- magnetization roasting;
- fluidization;
- siderite;
- preoxdization;
- low-temperature reduction

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References

[1]	World Steel Association, 2022 World Steel in Figures, World Steel Association, 2022.
[2]	J.W. Yu, Y.X. Han, Y.J. Li, and P. Gao, Growth behavior of the magnetite phase in the reduction of hematite via a fluidized bed, Int. J. Miner. Metall. Mater., 26(2019), No. 10, p. 1231. doi: 10.1007/s12613-019-1868-8
[3]	S.K. Roy, D. Nayak, and S.S. Rath, A review on the enrichment of iron values of low-grade iron ore resources using reduction roasting-magnetic separation, Powder Technol., 367(2020), p. 796. doi: 10.1016/j.powtec.2020.04.047
[4]	Y.J. Li, Q. Zhang, S. Yuan, and H. Yin, High-efficiency extraction of iron from early iron tailings via the suspension roasting-magnetic separation, Powder Technol., 379(2021), p. 466. doi: 10.1016/j.powtec.2020.10.005
[5]	X.R. Zhu, Y.X. Han, Y.S. Sun, P. Gao, and Y.J. Li, Thermal decomposition of siderite ore in different flowing atmospheres: Phase transformation and magnetism, Miner. Process. Extr. Metall. Rev, 44(2023), No.3, p. 201. doi: 10.1080/08827508.2022.2040498
[6]	V.P. Ponomar, N.O. Dudchenko, and A.B. Brik, Synthesis of magnetite powder from the mixture consisting of siderite and hematite iron ores, Miner. Eng., 122(2018), p. 277. doi: 10.1016/j.mineng.2018.04.018
[7]	Q. Zhang, Y.S. Sun, Y.X. Han, and Y.J. Li, Pyrolysis behavior of a green and clean reductant for suspension magnetization roasting, J. Clean. Prod., 268(2020), art. No. 122173. doi: 10.1016/j.jclepro.2020.122173
[8]	Y.H. Luo, D.Q. Zhu, J. Pan, and X.L. Zhou, Thermal decomposition behaviour and kinetics of Xinjiang siderite ore, Miner. Process. Extr. Metall., 125(2016), No. 1, p. 17. doi: 10.1080/03719553.2015.1118213
[9]	Y.J. Li, G. Yang, R.C. Zhao, Y.X. Han, and S. Yuan, Feature of refractory iron ore containing siderite and its research trends of beneficiation technology, Multipurp. Util. Miner. Resour., 2015, No. 2, p. 12.
[10]	C.Q. Hu, Y.F. He, D.F. Liu, et al., Advances in mineral processing technologies related to iron, magnesium, and lithium, Rev. Chem. Eng., 36(2019), No. 1, p. 107. doi: 10.1515/revce-2017-0053
[11]	Z.D. Tang, H.X. Xiao, Y.S. Sun, P. Gao, and Y.H. Zhang, Exploration of hydrogen-based suspension magnetization roasting for refractory iron ore towards a carbon-neutral future: A pilot-scale study, Int. J. Hydrogen Energy, 47(2022), No. 33, p. 15074. doi: 10.1016/j.ijhydene.2022.02.219
[12]	S. Yuan, R.F. Wang, P. Gao, Y.X. Han, and Y.J. Li, Suspension magnetization roasting on waste ferromanganese ore: A semi-industrial test for efficient recycling of value minerals, Powder Technol., 396(2022), p. 80. doi: 10.1016/j.powtec.2021.10.048
[13]	X.L. Zhang, Y.X. Han, Y.S. Sun, and Y.J. Li, Innovative utilization of refractory iron ore via suspension magnetization roasting: A pilot-scale study, Powder Technol., 352(2019), p. 16. doi: 10.1016/j.powtec.2019.04.042
[14]	X.Y. Liu, Y.F. Yu, and W. Chen, Research on flash magnetizing roasting-magnetic separation for Daxigou siderite, Met. Mine, 39(2009), No. 10, p. 84.
[15]	Q.S. Zhu and H.Z. Li, Status quo and development prospect of magnetizing roasting via fluidized bed for low grade iron ore, CIESC J., 65(2014), No. 7, p. 2437.
[16]	A.A. Adetoro, H.Y. Sun, S.Y. He, Q.S. Zhu, and H.Z. Li, Effects of low-temperature pre-oxidation on the titanomagnetite ore structure and reduction behaviors in a fluidized bed, Metall. Mater. Trans. B, 49(2018), No. 2, p. 846. doi: 10.1007/s11663-018-1193-z
[17]	H.M. Na, J.C. Sun, Z.Y. Qiu, et al., A novel evaluation method for energy efficiency of process industry–A case study of typical iron and steel manufacturing process, Energy, 233(2021), art. No. 121081. doi: 10.1016/j.energy.2021.121081
[18]	J.W. Yu, Y.F. Li, Y. Lv, Y.X. Han, and P. Gao, Recovery of iron from high-iron red mud using suspension magnetization roasting and magnetic separation, Miner. Eng., 178(2022), art. No. 107394. doi: 10.1016/j.mineng.2022.107394
[19]	Z.D. Tang, Q. Zhang, Y.S. Sun, P. Gao, and Y.X. Han, Pilot-scale extraction of iron from flotation tailings via suspension magnetization roasting in a mixture of CO and H₂ followed by magnetic separation, Resour. Conserv. Recycl., 172(2021), art. No. 105680. doi: 10.1016/j.resconrec.2021.105680
[20]	S. Yuan, W.T. Zhou, Y.X. Han, and Y.J. Li, Efficient enrichment of iron concentrate from iron tailings via suspension magnetization roasting and magnetic separation, J. Mater. Cycles Waste Manage., 22(2020), No. 4, p. 1152. doi: 10.1007/s10163-020-01009-2
[21]	Z.D. Tang, P. Gao, Y.J. Li, et al., Recovery of iron from hazardous tailings using fluidized roasting coupling technology, Powder Technol., 361(2020), p. 591. doi: 10.1016/j.powtec.2019.11.074
[22]	M. Gheisari, M. Mozaffari, M. Acet, and J. Amighian, Preparation and investigation of magnetic properties of wüstite nanoparticles, J. Magn. Magn. Mater., 320(2008), No. 21, p. 2618. doi: 10.1016/j.jmmm.2008.05.028
[23]	S. Yuan, H.X. Xiao, T.Y. Yu, Y.J. Li, and P. Gao, Enhanced removal of iron minerals from high-iron bauxite with advanced roasting technology for enrichment of aluminum, Powder Technol., 372(2020), p. 1. doi: 10.1016/j.powtec.2020.05.112
[24]	V.P. Ponomar, M.M. Bagmut, E.A. Kalinichenko, and A.B. Brik, Experimental study on oxidation of synthetic and natural magnetites monitored by magnetic measurements, J. Alloys Compd., 848(2020), art. No. 156374. doi: 10.1016/j.jallcom.2020.156374
[25]	W. Kim, C.Y. Suh, S.W. Cho, et al., A new method for the identification and quantification of magnetite-maghemite mixture using conventional X-ray diffraction technique, Talanta, 94(2012), p. 348. doi: 10.1016/j.talanta.2012.03.001
[26]	F.J. Gotor, M. Macías, A. Ortega, and J.M. Criado, Comparative study of the kinetics of the thermal decomposition of synthetic and natural siderite samples, Phys. Chem. Min., 27(2000), No. 7, p. 495. doi: 10.1007/s002690000093
[27]	H. Shokrollahi, A review of the magnetic properties, synthesis methods and applications of maghemite, J. Magn. Magn. Mater., 426(2017), p. 74. doi: 10.1016/j.jmmm.2016.11.033
[28]	B. Weiss, J. Sturn, F. Winter, and J.L. Schenk, Empirical reduction diagrams for reduction of iron ores with H₂ and CO gas mixtures considering non-stoichiometries of oxide phases, Ironmaking Steelmaking, 36(2009), No. 3, p. 212. doi: 10.1179/174328108X380645
[29]	V.P. Romanov, L.F. Checherskaya, and P.A. Tatsienko, Peculiarities of wustite formed below 570℃, Phys. Status Solidi A, 15(1973), No. 2, p. 721. doi: 10.1002/pssa.2210150244
[30]	A. Pineau, N. Kanari, and I. Gaballah, Kinetics of reduction of iron oxides by H₂, Thermochim. Acta, 447(2006), No. 1, p. 89. doi: 10.1016/j.tca.2005.10.004
[31]	P.K. Gallagher and S. St J Warne, Thermomagnetometry and thermal decomposition of siderite, Thermochim. Acta, 43(1981), No. 3, p. 253. doi: 10.1016/0040-6031(81)85183-0