某铀矿山离子交换吸附工艺影响因素试验研究

The Experimental Research on Influencing Factors of Ion Exchange Adsorption Process in a Uranium Mine

针对某铀矿浸出液离子交换吸附工艺树脂饱和容量低、尾液含量高等问题,通过模拟生产使用的密实移动床,开展室内离子交换吸附条件试验;根据矿石性质和树脂选择性,确定了离子交换吸附工艺的主要影响因素。本次试验主要研究了铀浓度、pH值、Fe^(3+)浓度和Cl^(-)浓度对树脂吸附效果的影响。试验结果表明:浸出液中铀浓度对树脂吸附效果影响较大,pH值、Fe^(3+)浓度和Cl^(-)浓度控制在一定范围内对吸附影响较小。通过本次研究,为铀浸出回收工艺控制提供了依据,有利于降低尾液铀浓度,提高吸附效果,保证各工序有效衔接及稳定运行。

Aiming at the problems of low resin saturation capacity and high uranium concentration in the recycled liquid that in the ion exchange adsorption process of uranium in leaching solution,the indoor ion exchange adsorption condition tests were carried out by simulating a packed moving bed used in production.According to the properties of uranium ore and the resin selectivety,the main influencing factors of ion exchange adsorption process were determined.This experiment mainly studied the influence of uranium concentration,pH,Fe^(3+)concentration and Cl^(-)concentration on the adsorption effect of resin.The results show that the concentration of uranium in leaching solution has a great influence on the adsorption effect of resin,while the pH,the concentration of Fe 3+and Cl-controlled within a certain range has little influence on the adsorption.Through this experimental research,the basis for the control of uranium leaching and recovery process is provided,which is conducive to reducing the concentration of uranium in the recycledliquid,improving the adsorption effect and ensuring the effective connection and stable operation of each process.