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Roasting-Water Leaching of Complex Niobium-Rare Earth Polymetallic Ore
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Guishuo WANG1, 2, 3, Huiwu LIU1, 2, 3, Zhongchen LIU1, 2, 3, Kang LIU1, 2, 3, Gengyu LIANG1, 2, 3, Hao CHENG1, 2, 3, Tongyan LIANG1, 2, Xilin GENG1, 2
Hydrometallurgy of China | 2026, 45(2) : 215 - 222
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Hydrometallurgy of China | 2026, 45(2): 215-222
• Experiment Research •
Roasting-Water Leaching of Complex Niobium-Rare Earth Polymetallic Ore
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Guishuo WANG1, 2, 3, Huiwu LIU1, 2, 3, Zhongchen LIU1, 2, 3, Kang LIU1, 2, 3, Gengyu LIANG1, 2, 3, Hao CHENG1, 2, 3, Tongyan LIANG1, 2, Xilin GENG1, 2
Affiliations
  • 1.China Nuclear Mining Science and Technology Corporation, CNNC, Beijing　101149, China
  • 2.Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Beijing　101149, China
  • 3.National Key Laboratory of Uranium Resources Exploration-Mining and Nuclear Remote Sensing, CNNC, Beijing　101149, China
Published: 2026-04-20 doi: 10.13355/j.cnki.sfyj.2026.02.011
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The extraction of niobium and rare earths from niobium concentrate by concentrated sulfuric acid low-temperature roasting-water leaching process was studied. The effects of sulfuric acid dosage, calcination temperature, calcination time, liquid volume to solid mass ratio of water leaching, water leaching time and water leaching temperature on the leaching rates of niobium and rare earths were investigated. The results show that under the optimized conditions of 120% sulfuric acid dosage, calcination temperature of 180 ℃, calcination time of 4 h, liquid volume to solid mass ratio of water leaching of 4∶1, water leaching time of 4 h and water leaching temperature of 25 ℃, the niobium leaching rate is 91.4% and the rare earth leaching rate is 93.9%. The process can achieve efficient extraction of niobium and rare earths from niobium concentrate.

niobium  /  rare earth  /  polymetallic ore  /  roasting  /  leaching
王桂硕, 刘会武, 刘忠臣, 刘康, 梁耕宇, 程浩, 梁童雁, 耿西林. 复杂铌-稀土多金属矿的焙烧—水浸试验研究. 湿法冶金, 2026 , 45 (2) : 215 -222 . DOI: 10.13355/j.cnki.sfyj.2026.02.011
Guishuo WANG, Huiwu LIU, Zhongchen LIU, Kang LIU, Gengyu LIANG, Hao CHENG, Tongyan LIANG, Xilin GENG. Roasting-Water Leaching of Complex Niobium-Rare Earth Polymetallic Ore[J]. Hydrometallurgy of China, 2026 , 45 (2) : 215 -222 . DOI: 10.13355/j.cnki.sfyj.2026.02.011
Appendix
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Year 2026 volume 45 Issue 2
145
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Article Info
doi: 10.13355/j.cnki.sfyj.2026.02.011
  • Receive Date：2025-11-03
  • Online Date：2026-09-28
  • Published：2026-04-20
Article Data
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History
  • Received：2025-11-03
  • Revised：2025-12-23
Funding
Affiliations
    1.China Nuclear Mining Science and Technology Corporation, CNNC, Beijing　101149, China
    2.Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Beijing　101149, China
    3.National Key Laboratory of Uranium Resources Exploration-Mining and Nuclear Remote Sensing, CNNC, Beijing　101149, 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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