期刊论文

Influence of Uranium Chemical Fractions on In-Situ Leaching of Uranium From Sandstone Deposits

中文

核化学与放射化学

0253-9950

2019

41

5

457-463

10.7538/hhx.2018.YX.2018047

国家自然科学基金资助项目(U1703123) 湖南省自然科学基金资助项目(2019JJ50496) 湖南省教育厅资助项目(13C799) 衡阳市科技局资助项目(2013KS28).

本校为第一机构

为研究铀赋存形态对地浸开采的影响,采用逐级提取法分离新疆某砂岩铀矿同一采区不同地段样品的铀赋存形态,测定其中的铀品位。结合室内浸出实验以及现场监测实验,探究了铀赋存形态与浸出动力学和浸出过程的关系。结果表明:相同采区不同地段的铀矿赋存形态存在差异,铀的浸出动力学受到F1-F4四种铀赋存形态的影响,首先由内扩散控制,然后转变为化学反应控制,铀表观浸出速率常数随着F1-F4相态铀质量分数提高而增大。浸出液铀浓度变化特征可以根据F1相态的质量分数分为两类:当F1质量分数高于25%时,铀浓度由高到低变化;当F1质量分数低于10%时,铀浓度表现为低→高→低的变化趋势。最后建立了铀初始浓度...

In order to study the influence of uranium chemical fraction on the in-situ leaching mining, the uranium chemical fractions of different samples from the same mining area of a sandstone uranium mine in Xinjiang were separated by step-by-step extraction method, and the uranium grades were determined. Combined with indoor leaching experiment and on-site monitoring experiment, the relationship between uranium chemical fraction and leaching kinetic as well as leaching process was explored. The results show that there are differences in the chemical fractions of uranium deposits in different sectio...