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Morphology Change and Thermal Decomposition Analysis of Baiyun Obo Ore Under Stable Magnetic Field
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Jintao JIANG1, 2, 3, 4, Yongli JIN1, 2, 3, 4
Mining and Metallurgical Engineering | 2023, 43(1) : 89 - 94
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Mining and Metallurgical Engineering | 2023, 43(1): 89-94
• METALLURGY •
Morphology Change and Thermal Decomposition Analysis of Baiyun Obo Ore Under Stable Magnetic Field
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Jintao JIANG1, 2, 3, 4, Yongli JIN1, 2, 3, 4
Affiliations
  • 1.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
  • 2.Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
  • 3.Provincial and Ministerial Co-founded Collaborative Innovation Center for Comprehensive and Efficient Exploitation of Bayan-Obo Associated Ore Resources, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
  • 4.National & Local Joint Engineering Research Center for Comprehensive Utilization of Discarded Resources of Bayan-Obo Associated Ore, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
Published: 2023-02-01 doi: 10.3969/j.issn.0253-6099.2023.01.020
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The influence of roasting on mineral decomposition under stable magnetic field was investigated. A direct reduction roasting experiment without carbon presence was performed for Bayan Obo lean iron, with roasting temperature of 950 ℃ and magnetic induction density of 1.02 T. Based on the analysis of the loss rate of mineral weight, mineral phase transformation and micro-morphology change by means of TG-DSC, XRD and SEM-EDS, the phase evolution law for rare earth minerals, gangue minerals and iron minerals under magnetic field was revealed. The results show that the decomposition time of bastnaesite is shortened by about 20 min after applying a stable magnetic field, and even the monazite with extremely low decomposition rate is almost completely decomposed after 60 min-roasting process. It is found that magnetic field can promote the decomposition and transformation of gangue minerals that cannot be decomposed without application of magnetism, and also accelerate the migration of alkali metal ions and the replacement of Fe2+ with fayalite.

stable magnetic field  /  Bayan Obo lean iron ore  /  roasting  /  gangue phase  /  rare earth phase
Jintao JIANG, Yongli JIN. Morphology Change and Thermal Decomposition Analysis of Baiyun Obo Ore Under Stable Magnetic Field[J]. Mining and Metallurgical Engineering, 2023 , 43 (1) : 89 -94 . DOI: 10.3969/j.issn.0253-6099.2023.01.020
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Article Info
doi: 10.3969/j.issn.0253-6099.2023.01.020
  • Receive Date：2022-09-05
  • Online Date：2026-03-05
  • Published：2023-02-01
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  • Received：2022-09-05
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Affiliations
    1.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
    2.Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
    3.Provincial and Ministerial Co-founded Collaborative Innovation Center for Comprehensive and Efficient Exploitation of Bayan-Obo Associated Ore Resources, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
    4.National & Local Joint Engineering Research Center for Comprehensive Utilization of Discarded Resources of Bayan-Obo Associated Ore, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, 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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