|
| Separation and Recovery of Iron and Niobium from Nb-bearing Tailings |
|
Received:September 17, 2014
Revised:September 27, 2014
Accepted:September 28, 2014
Published Online:January 23, 2015
|
| View Full Text View/Add Comment Download reader |
| DOI：10.3969/j.issn.1007-7545.2015.02.002 |
| KeyWord:Nb-bearing tailings; carbothermic reduction; magnetic separation; Bayan Obo |
| Author | Institution |
| ZHANG Xun-di |
东北大学 多金属共生矿生态化冶金教育部重点实验室 |
| LIU Cheng-jun |
东北大学 多金属共生矿生态化冶金教育部重点实验室 |
| YU Zhu-ying |
东北大学 多金属共生矿生态化冶金教育部重点实验室 |
| YUAN Hao-zhi |
东北大学 多金属共生矿生态化冶金教育部重点实验室 |
|
| Hits: 2536 |
| Download times: 2509 |
| Abstract: |
| Iron recovery and niobium enrichment from Nb-bearing tailings in Bayan Obo were investigated by carbothermic reduction and magnetic separation based on thermodynamic analysis. The results show that iron oxide can be selective reduced at 1 000~1 100 ℃ with carbon as reductant. Separation of iron concentrate and niobium minerals could be realized by reduction roasting at 1 100 ℃ for 0.5 h and then wet grinding under magnetic field strength of 50 mT. Iron grade in magnetite iron concentrate is 84.82% with iron recovery rate of 81.95%. Nb2O5 grade in magnetic tailings is 1.98% with niobium recovery rate of 95% above. |
| Close |