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| Calculation of Leachable Resources of Interbedded Uranium Deposit and Analysis of Reservoir Permeability Improvement |
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Received:October 24, 2022
Revised:November 02, 2022
Accepted:November 08, 2022
Published Online:January 09, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.02.010 |
| KeyWord:uranium deposits; leachable resources; calcareous interlayer; permeability improvement of reservoir |
| Author | Institution |
| WANG Ya-nu |
核工业北京化工冶金研究院 |
| SU Xue-bin |
中国铀业有限公司 |
| ZHAO Li-xin |
核工业北京化工冶金研究院 |
| HUO Jian-dang |
核工业北京化工冶金研究院 |
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| Abstract: |
| The uranium ore grade of calcareous interlayer in a mining area of Ordos is high and the interlayer thickness is large. Whether the calcareous interlayer is considered has a significant influence on calculation of the reserves and leachable resources. Based on the logging interpretation data of the test well, the characteristics of the calcareous interbedded uranium deposit were described, the main logging response characteristics of the calcareous interbedded uranium deposit were identified, and the reserves of the calcareous interbedded uranium deposit were calculated by linear interpolation method. The results show that the reserves of the calcareous interbedded uranium deposit account for 25.2% of the total reserves. The application results show that under CO2+O2 leaching process, without considering the interlayer, the amount of leachable resources of this unit is 16 978 kg. When considering the reserves of calcareous interlayer and effect of CO2, the amount of leachable resources is 17 210 kg, which is 1.36% higher than that without considering the interlayer. The leaching rate of uranium in calcareous interlayer is 2.37%. The effects of various permeability improvement technologies on leachability are quantitatively considered. Acid and ultrasonic permeability improvement technologies could increase the leaching rate of calcareous interlayer to 7.84% and 9.42% respectively, and the amount of leachable resources of this unit is increased by 4.51% and 5.43% respectively, compared with that without considering the interlayer. Under ideal conditions, blasting permeability improvement technology can realize the maximum exploitation of calcareous intercalation, but it will inhibit the efficient leaching of conventional ore bed. The results show that the leaching capacity of calcareous interbedded uranium ore has a great influence on the total leaching capacity of calcareous interbedded uranium ore, and the leaching capacity of calcareous interbedded uranium ore can be significantly increased by adopting certain permeability improvement technology. |
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