Abstract

Urea CO(NH₂)₂ is an effective selective lixiviant for uranium from phosphate raw material. Experiments were performed to determine the factors of uranium dissolution from El-Sebaiya phosphate ore. Under the optimized conditions, uranium is extracted almost completely without significant changes in the chemical composition of the phosphate ore. From the latter, highly pure uranium-free phosphoric acid can be prepared. Analysis of the kinetic data using shrinking core models shows that the uranium leaching from El-Sebaiya phosphate ore with urea is a process controlled by chemical reaction.

中文翻译：

---

使用尿素选择性地从El-Sebaiya磷酸盐岩中回收铀

摘要

尿素CO（NH ₂）₂是从磷酸盐原料中提取铀的有效选择性浸出剂。进行实验以确定从El-Sebaiya磷矿中溶解铀的因素。在优化的条件下，铀几乎完全被提取出来，而磷矿石的化学组成没有明显变化。从后者可以制备高纯度的无铀磷酸。使用收缩核模型对动力学数据进行分析表明，尿素从El-Sebaiya磷酸盐矿石中浸出的铀是受化学反应控制的过程。