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Abstract
In this study, a novel technology for the comprehensive utilization of low-grade iron ore is presented. For the iron ore with a Fe content of 24.91%, a pilot-scale study of pre-concentration, suspension magnetization roasting, grinding, and low-intensity magnetic separation was conducted, and an iron concentrate with a grade of 62.21% and a recovery of 85.72% was obtained. The products were analysed using chemical elemental analysis, particle size analysis, X-ray diffraction, scanning electron microscopy, and vibrating sample magnetometry. The results indicated that hematite was reduced by CO and H2 mixture and transformed into ferrimagnetic magnetite in the suspension magnetization roasting, which was easily recovered in the subsequent magnetic separation. Additionally, a pre-concentration tailing with a SiO2 content of 81.55% and a magnetic tailing of the roasted ore with a SiO2 content of 79.57% were obtained, which can be used as building materials. This presents significant implications for the comprehensive utilization of low-grade iron ore.
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He J, Chen H, Zhu L, Tan M, Liu B, Chen L, Zhang M. Decarbonization and upgrading of fine-sized coal-series kaolinite via the enhancement of density stability and uniformity of dense-phase gas-solid fluidized bed. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.08.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Oshitani J, Sasaki T, Tsuji T, Harada S, Kajiwara H, Matsuoka K. Unstable sinking of spheres at higher air velocity in a gas-solid fluidized bed. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.02.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Zheng F, Guo Y, Fan J, Yao H, Chen F, Wang S, Yang L, Jiang T, Qiu G. R31 filter aid enhances filtration of fine hematite concentrate particles. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2020.09.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Roy SK, Nayak D, Rath SS. A review on the enrichment of iron values of low-grade Iron ore resources using reduction roasting-magnetic separation. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.04.047] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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He J, Bai Q, Du T. Beneficiation and upgrading of coarse sized low-grade bauxite using a dry-based fluidized bed separator. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2019.10.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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