内蒙古某砂岩型铀矿地浸采铀技术的高效优化与应用

地浸采铀是当前砂岩型铀矿开采最主要的方法，采用该方法进行铀矿开采其生产能力、浸采率、开采成本是地浸采铀工作关注的重点。为提高浸出效率、降低成本，在内蒙古某地浸采铀矿山开展过滤器、酸度、抽液量对铀浸出效能的优化研究与应用。研究表明将过滤器长度控制在4~6m能保证其处于高效工作状态，过滤器上段与品位相对较高的富矿段对接有助于铀浸采率的提升。将溶浸液酸度控制在15g/L左右可提高铀浸出效率和浸出液铀浓度。将抽液量（单宽）维持在0.75m2/h~1.0m2/h，能使采区保持较高的铀生产能力和较低的浸出液量。通过优化的工艺技术参数，优化后的浸出液峰值铀浓度由优化前的28.89mg/L提升至59.72mg/L。采区投运的前两年，铀浸出率由47.20%提升到60.99%，浸出液平均铀浓度由17.43mg/L提升至32.63mg/L，吨铀耗酸减少15.26%，吨铀耗电减少46.51%。从而实现了地浸采铀技术的高效优化。

Efficient optimization and application of in-situ leaching of uranium technology in a sandstone-type uranium mine in Inner Mongolia

In-situ leaching of uranium is the most important method for mining sandstone type uranium at present, and the production capacity, leaching rate and mining cost are the focus of in-situ leaching of uranium. In order to improve leaching efficiency and reduce costs, the optimization of filter, acidity and pumping volume on the leaching efficiency of uranium was studied and applied in an in-situ leaching uranium mine in Inner Mongolia. The research showed that the length of the filter could be controlled within 4~6m to ensure its high efficiency, and the connection between the upper section of the filter and the rich ore section with relatively high grade was conducive to the improvement of uranium leaching rate. The leaching efficiency and concentration of uranium in leaching solution could be improved by controlling the acidity of