Full
Outline
Pressurization serves as a critical approach for regulating reaction rate in hydrometallurgical processes. To investigate the effects of pressure conditions on uranium leaching performance, laboratory-scale simulated heap leaching tests of uranium ore were carried out using a self-made room-temperature pressurized leaching device, with hard-rock type uranium ore from a mine in southern China as the research material. The results indicate that room-temperature pressurized leaching can accelerates the leaching reaction rate, yet it exerts no positive effect on improving the final uranium leaching rate. Pressurization exhibits a significant promoting effect on uranium leaching before the uranium leaching rate reaches 60%, and the leaching performance is optimal under a pressure of 40 kPa when the uranium leaching rate is below 85%. After 15 days of pressurized leaching, the highest uranium leaching rate reaches 94.66%, while the lowest is 85.90%. This study reveals that based on the correlation between pressure and leaching performance during room-temperature pressurized leaching, the uranium heap leaching technology can be effectively optimized by regulating pressure—a physical parameter with the advantages of controllability and low cost—thereby achieving the high-efficiency recovery of uranium resources.
125
23
| 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 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
