|
| New Process of Direct Reduction to Treat Complex Rare Metal Ore |
|
Received:April 17, 2013
Revised:April 17, 2013
Accepted:April 18, 2013
Published Online:September 29, 2013
|
| View Full Text View/Add Comment Download reader |
| DOI：10.3969/j.issn.1007-7545.2013.10.009 |
| KeyWord:rare metal ore; direction reduction; acidification and leaching |
| Author | Institution |
| LIU Mu-dan |
广州有色金属研究院 |
| LIU Yong |
广州有色金属研究院 |
| LIU Zhen-zhen |
广州有色金属研究院 |
|
| Hits: 2481 |
| Download times: 2744 |
| Abstract: |
| A new process composed of direct reduction, acidification and leaching, precipitation and roasting was developed to recover rare earth, niobium, tantalum and iron from a complex rare metal ore. The results show that the iron powder with 91.62% TFe and recovery of 91.03% is obtained when raw ore is mixed with mass fraction 35% alkaline additive, reduced at 1 050 ℃ for 120 min, and then separated by wet low intensity magnetic separation. The rare earth oxide with 93.27% REO and recovery of 74.26% is gained when the nonmagnetic materials are acidized with sulfuric acid, leached and precipitated. Nb-Ta precipitation is obtained from precipitated solution at pH value of 8.5 adjusted with ammonia water. The Nb-Ta enrichment with 32.65% Nb(Ta)2O5 is produced after the precipitation is roasted, and the recovery of niobium and tantalum is 75.44% and 66.21% respectively. |
| Close |
|
|
|