| 摘要 |
A process is described for improving yields and leaching rates of mineral values in highly reducing uranium-bearing formations, while minimizing deleterious environmental impact, by injecting an oxidant such as gaseous air or O2 into the formation prior to leaching. The preoxidation may be enhanced by the presence of CO2 gas in the pre-leaching oxidant. The process is particularly suitable for systems employing a CO2/O2 lixiviant. The presence of sulfate ion further improves the leaching rate of such a system.
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