Gangue–reagent interactions during acid leaching of uranium
Gangue–reagent interactions during acid leaching of uranium
复制标题
DOI：
10.1016/j.mineng.2013.03.030
复制
发表时间：
2013-10
影响因子：
4.8
通讯作者：
B. Youlton;J. Kinnaird
中科院分区：
文献类型：
--
作者：
B. Youlton;J. Kinnaird
在铀的酸浸过程中，脉石-试剂的相互作用既有消极的影响，也有积极的影响。煤矸石溶解增加了试剂成本，在某些情况下可能会妨碍矿石的经济酸浸，但也会增加铀矿物的暴露并提高回收率。由于快速溶解动力学，各种碳酸盐物质的酸消耗特性很容易预测，但硅酸盐脉石的酸消耗特性却并非如此。由于包括较慢的浸出速率、不一致的溶解、抛物线动力学以及表面积、pH和温度依赖性等因素，硅酸盐矿物的脉石酸消耗特性明显更加复杂。对砂岩铀矿样品进行了详细的矿物学调查和酸浸试验。确定了较常见的脉石相的溶解特性。该研究表明，可以从矿物学数据预测脉石-试剂相互作用，从而降低加工过程中的技术风险。
During the acid leaching of uranium, gangue–reagent interactions have both negative and positive consequences. Gangue dissolution increases reagent costs, and in some cases can prevent the economic acid leaching of an ore, but can also increase uranium mineral exposure and improve recoveries. Due to rapid dissolution kinetics, the acid consumption characteristics of the various carbonate species are readily predicted, however the same is not true of silicate gangue. Due to factors including slower leach rates, incongruent dissolution, parabolic kinetics, and surface area, pH and temperature dependence, the gangue acid consumption characteristics of silicate minerals are significantly more complex. A detailed mineralogical investigation and acid leach tests were conducted on sandstone-hosted uranium ore samples. The dissolution characteristics of the more common gangue phases were determined. The study demonstrated that gangue–reagent interactions can be predicted from mineralogical data, thus reducing technical risk during processing.