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| Removal and Separation of Uranium and Thorium from Radioactive Nb-Fe Concentrate |
| Received:October 12, 2023 Revised:October 19, 2023 |
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| DOI：doi：10.3969/j.issn.1007-7545.2024.02.012 |
| KeyWord:Nb-Fe concentrate; uranium; thorium; multi-stage leaching |
| Author | Institution |
| KE Pingchao |
东华理工大学 水资源与环境工程学院 |
| WANG Kunkun |
东华理工大学 水资源与环境工程学院 |
| ZHONG Tingting |
东华理工大学 水资源与环境工程学院 |
| ZHOU YIpeng |
东华理工大学 水资源与环境工程学院 |
| MA Xiaolei |
东华理工大学 水资源与环境工程学院 |
| WAN Lingyun |
东华理工大学 水资源与环境工程学院 |
| XU Lingling |
东华理工大学 水资源与环境工程学院 |
| WANG Jian |
东华理工大学 水资源与环境工程学院 |
| LI Guangrong |
东华理工大学 水资源与环境工程学院 |
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| Abstract: |
| Through the process mineralogy analysis of the radioactive Nb-Fe concentrate imported by a domestic enterprise, the main mineral phase of the concentrate is pyrochlore, associated with ilmenite and muscovite. The contents of radioactive elements U and Th in the ore are 0.27% and 1.03% respectively. For this Nb-Fe concentrate, the leaching and separation effects of U and Th in H2SO4-Fe(Ⅲ), H2SO4-HF, H2SO4-HF-H2O2, and H2SO4-HF-H2O2-(NH4)2CO3 systems were explored. Finally, it is determined that H2SO4-HF-H2O2-(NH4)2CO3 multi-stage leaching process can effectively remove and separate U and Th. The removal efficiency of U and Th is 100% and 80% respectively. Based on the research, the removal and separation process of U and Th from Nb-Fe concentrate is proposed. |
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