一种强化碱法堆浸提铀工艺的研究

A study of extracting uranium by intensified alkaline heap leaching

研究了一种用来处理高碳酸盐含量铀矿石的新强化碱法堆浸提铀技术。筑堆前用少量高浓度的碱溶液与矿石拌合,并于一定温度下进行熟化,然后筑堆,用低浓度碱溶液喷淋。由于改变传统的先筑堆后浸出的做法,从而大大地缩短了浸出周期,使原来不宜堆浸或浸出率低的矿石,变成适宜用堆浸来处理或使浸出率有所提高。用该方法处理某高碳酸盐含量铀矿石,浸出率由约50%提高到90%以上,浸出时间由64 d缩短到12 d。

A new technique of extracting uranium by intensified alkaline heap leaching was presented to treat a uranium ore of high carbonate content. A lixiviant, high concentration of alkaline solution, reacts with the ore prior to heap making for some time at a certain temperature, reducing the leaching time remarkably. With this technique, the leaching rate of uranium increased from 50% to 90% or above and the leaching time decreased from 64 days to 12 days.