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Research Progress on the Blockage of In-situ Leaching Uranium Induced by Clay Minerals and Pyrite
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Xuerui ZHAO1, 2, Zhenzhong LIU1, Chunguang LI1, 2, Ying XU3, Xianzhe DUAN1, Weimin QUE3, Zhenping TANG1
Uranium Mining and Metallurgy | 2026, 45(2) : 1 - 11
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Uranium Mining and Metallurgy | 2026, 45(2): 1-11
• Cover Article •
Research Progress on the Blockage of In-situ Leaching Uranium Induced by Clay Minerals and Pyrite
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Xuerui ZHAO1, 2, Zhenzhong LIU1, Chunguang LI1, 2, Ying XU3, Xianzhe DUAN1, Weimin QUE3, Zhenping TANG1
Affiliations
  • 1.School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
  • 2.R&D Center of Radioactive Waste Treatment, Disposal and Modeling, University of South China, Hengyang 421001, China
  • 3.Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Beijing 101149, China
Published: 2026-05-20 doi: 10.13426/j.cnki.yky.2025.09.06
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In-situ leaching (ISL) of uranium, a core technology in China's uranium mining, faces significant challenges due to pore blockage caused by clay minerals and pyrite, which severely restricts leaching efficiency and production capacity. This paper systematically reviews the causes and mechanisms of blocking phenomena in acid leaching, alkaline leaching, and "CO2 + O2" neutral leaching processes. It reveals that clay minerals induce pore blockage through physicochemical interactions such as swelling, ion exchange, and argillization of non-clay minerals, while pyrite oxidation generates sulfate and iron ions, leading to permeability reduction via mineral precipitation and colloidal adsorption. Current unblocking technologies primarily employ inhibitors to suppress pyrite oxidation, chelating agents to immobilize iron-containing precipitates, and swelling suppressants to mitigate clay mineral expansion. However, challenges remain, including lack of specificity, limited environmental compatibility, and insufficient long-term stability. Future research should focus on elucidating the synergistic mechanisms of clay-pyrite interactions, developing intelligent unblocking materials with targeted functionality, and establishing ecological risk assessment frameworks. These advancements aim to drive innovation in green and efficient unblocking technologies, providing theoretical and technical support for China's large-scale uranium base construction and sustainable nuclear energy development.

in-situ leaching of uranium (ISL)  /  blocking mechanism  /  clay minerals  /  pyrite  /  clogging mitigation
赵学瑞, 刘振中, 李春光, 许影, 段先哲, 阙为民, 唐振平. 黏土矿和黄铁矿诱发地浸采铀堵塞的研究进展. 铀矿冶, 2026 , 45 (2) : 1 -11 . DOI: 10.13426/j.cnki.yky.2025.09.06
Xuerui ZHAO, Zhenzhong LIU, Chunguang LI, Ying XU, Xianzhe DUAN, Weimin QUE, Zhenping TANG. Research Progress on the Blockage of In-situ Leaching Uranium Induced by Clay Minerals and Pyrite[J]. Uranium Mining and Metallurgy, 2026 , 45 (2) : 1 -11 . DOI: 10.13426/j.cnki.yky.2025.09.06
Appendix
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Year 2026 volume 45 Issue 2
96
20
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Article Info
doi: 10.13426/j.cnki.yky.2025.09.06
  • Receive Date：2025-09-07
  • Online Date：2026-09-28
  • Published：2026-05-20
Article Data
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History
  • Received：2025-09-07
  • Revised：2025-10-24
Funding
Affiliations
    1.School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
    2.R&D Center of Radioactive Waste Treatment, Disposal and Modeling, University of South China, Hengyang 421001, China
    3.Beijing Research Institute of Chemical Engineering and Metallurgy, 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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