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Reduction Roasting of Refractory Hematite-Limonite Ore Containing Lead and Zinc Impurities and Its Kinetics Research
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Liqun LUO1, 2, Yanming LEI1, 2, Chenxi WEI1, 2, Yuanlin YE1, 2
Mining and Metallurgical Engineering | 2023, 43(2) : 86 - 90
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Mining and Metallurgical Engineering | 2023, 43(2): 86-90
• MINERAL PROCESSING •
Reduction Roasting of Refractory Hematite-Limonite Ore Containing Lead and Zinc Impurities and Its Kinetics Research
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Liqun LUO1, 2, Yanming LEI1, 2, Chenxi WEI1, 2, Yuanlin YE1, 2
Affiliations
  • 1.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
  • 2.Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan 430070, Hubei, China
Published: 2023-04-01 doi: 10.3969/j.issn.0253-6099.2023.02.020
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A kind of refractory hematite-limonite ore containing 0.39% lead, 0.30% zinc and 47.04% TFe was taken to perform carbothermic reduction roasting experiment, and the reduction effect of hematite-limonite ore and the removal rate of lead and zinc in the reduction roasting process were all investigated. The reaction fraction, reaction rate and kinetic parameters of the reduction roasting process were studied by means of thermogravimetric analysis at a constant temperature, and the kinetics of carbothermic reduction roasting of refractory hematite-limonite ore was also discussed. After 60-min roasting at 1 200 ℃ with the reducing agents of carbon and oxygen at a ratio of 2.25, the obtained roasted ore was subjected to low intensity magnetic separation, resulting in the yielded iron concentrate grading 89.63% TFe at 86.09% recovery and the removal rates of lead and zinc up to 98.97% and 91.19%, respectively. The iron minerals are mainly transformed into spherical metallic iron particles with iron purity over 99.4% in micro-zone. The reduction roasting process of iron ore follows the shrinkage boundary control reaction mechanism and shrinkage core model. The apparent activation energy is calculated to be 91.37 kJ/mol, and the pre-exponential factor is calculated to be 18.09 min-1, indicating that the rate-limiting reaction step is solid-state diffusion. This research can provide reference for removing harmful impurities from similar ores by reduction roasting process.

hematite-limonite ore  /  reduction roasting  /  kinetics  /  lead  /  zinc  /  impurity  /  iron concentrate
Liqun LUO, Yanming LEI, Chenxi WEI, Yuanlin YE. Reduction Roasting of Refractory Hematite-Limonite Ore Containing Lead and Zinc Impurities and Its Kinetics Research[J]. Mining and Metallurgical Engineering, 2023 , 43 (2) : 86 -90 . DOI: 10.3969/j.issn.0253-6099.2023.02.020
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Year 2023 volume 43 Issue 2
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Article Info
doi: 10.3969/j.issn.0253-6099.2023.02.020
  • Receive Date：2022-10-28
  • Online Date：2026-03-05
  • Published：2023-04-01
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  • Received：2022-10-28
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Affiliations
    1.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
    2.Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan 430070, Hubei, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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