Method for recovering uranium from high-quality monazite slag

• Main Authors: LIU HUIWU, WANG GUISHUO, CHENG HAO, LIU KANG, ZHANG CHENGTIAN, LIU ZHONGCHEN, XIANG QIULIN, SU XUEBIN, HUANG YONG, LIANG GENGYU
• Format: Patent
• Language: Chinese; English
• Published: 11.08.2023
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a method for recycling uranium from high-quality monazite molten slag, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: 1, leaching; 2, carrying out solid-liquid separation; 3, extracting to remove iron; and 4, extracting uranium. According to the method, the problem that solid-liquid separation of ore pulp is difficult is solved by adding polyacrylamide, the leaching rate of uranium, thorium and rare earth is high by adopting a high hydrochloric acid system, iron is removed and uranium is extracted step by step by utilizing a single extraction technology, the process is simple and easy to use, the uranium-iron-thorium separation effect is good, sodium diuranate prepared from uranium qualified liquid is few in impurity, high in quality and suitable for industrial application. 本发明提供了一种从独居石优溶渣中回收铀的方法，属于湿法冶金技术领域。本发明的方法包括以下步骤：1.溶浸；2.固液分离；3.萃取除铁；4.萃取提铀。本发明方法通过添加聚丙烯酰胺解决矿浆固液分离困难问题，采用高盐酸体系，铀、钍、稀土浸出率高，利用单一萃取技术分步萃取除铁提铀，工艺简单易用，铀铁钍分离效果好，铀合格液制备重铀酸钠，杂质少