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Process Mineralogy Study and Separation Process of Atmosphere Roasting and Dilute Sulfuric Acid Leaching for Mixed Rare Earth Concentrate
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Liang WANG1, 2, 3, Wenbin XIN1, 2, 3, Wenbo LI4, Yongchun DENG1, 2, 3, Xiaolong ZHANG4, Yinju JIANG1, 2, 3, Jianfei LI1, 2, 3
Mining and Metallurgical Engineering | 2025, 45(2) : 113 - 117
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Mining and Metallurgical Engineering | 2025, 45(2): 113-117
• METALLURGY •
Process Mineralogy Study and Separation Process of Atmosphere Roasting and Dilute Sulfuric Acid Leaching for Mixed Rare Earth Concentrate
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Liang WANG1, 2, 3, Wenbin XIN1, 2, 3, Wenbo LI4, Yongchun DENG1, 2, 3, Xiaolong ZHANG4, Yinju JIANG1, 2, 3, Jianfei LI1, 2, 3
Affiliations
  • 1.School of Rare Earth Industry (School of Rare Earth Engineering), Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
  • 2.Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources of Ministry of Education, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
  • 3.Inner Mongolia Engineering Research Center for Clean Extraction of Light Rare Earth and Application, Baotou 014010, Inner Mongolia, China
  • 4.School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China
Published: 2025-04-01 doi: 10.3969/j.issn.0253-6099.2025.02.020
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Based on process mineralogy study, a processing technique consisting of atmosphere roasting and leaching with dilute sulfuric acid was proposed to separate a kind of mixed rare earth concentrate containing 48.23% REO. It is found that the phase composition of such concentrate is mainly composed of bastnaesite, monazite, apatite and fluorite, with rare earth elements primarily existing in bastnaesite and monazite. Under air/argon atmosphere roasting, phases of monazite, apatite and fluorite can remain stable, and phase transition is mainly attributed to bastnaesite reaction. In an air atmosphere, bastnaesite is transitioned in the following steps, CeFCO3→Ce7O12→Ce11O20→CeO2, while its transition steps in an argon atmosphere include CeFCO3→Ce7O12, Th0.5Ce0.5O1.84→CeOF. After roasting in an air atmosphere at 500 ℃ followed by leaching with dilute sulfuric acid, the leaching rates of F-REO and P-REO can reach 86.67% and 1.70%, respectively, while the process of roasting at 700 ℃ in an argon atmosphere can lead to the leaching rates of F-REO and P-REO at 75.97% and 13.33% respectively. And the leaching residues obtained from above-mentioned two different processes have F-REO and P-REO contents of 6.92%, 26.02% and 11.86%, 21.81% respectively, all dominated by monazite. It is concluded that this processing technique of atmosphere roasting followed by dilute sulfuric acid leaching can effectively achieve separation between bastnaesite and monazite.

rare earth  /  bastnaesite  /  monazite  /  mixed rare earth concentrate  /  process mineralogy  /  atmosphere roasting  /  phase transition  /  sulfuric acid leaching
Liang WANG, Wenbin XIN, Wenbo LI, Yongchun DENG, Xiaolong ZHANG, Yinju JIANG, Jianfei LI. Process Mineralogy Study and Separation Process of Atmosphere Roasting and Dilute Sulfuric Acid Leaching for Mixed Rare Earth Concentrate[J]. Mining and Metallurgical Engineering, 2025 , 45 (2) : 113 -117 . DOI: 10.3969/j.issn.0253-6099.2025.02.020
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Article Info
doi: 10.3969/j.issn.0253-6099.2025.02.020
  • Receive Date：2024-10-10
  • Online Date：2026-03-19
  • Published：2025-04-01
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  • Received：2024-10-10
Funding
Affiliations
    1.School of Rare Earth Industry (School of Rare Earth Engineering), Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
    2.Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources of Ministry of Education, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
    3.Inner Mongolia Engineering Research Center for Clean Extraction of Light Rare Earth and Application, Baotou 014010, Inner Mongolia, China
    4.School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, 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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