|
| Study on New Technology of Efficient Extraction of Palladium from Complex Platinum-palladium Concentrate |
|
Received:January 08, 2019
Revised:January 15, 2019
Accepted:January 16, 2019
Published Online:April 16, 2019
|
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2019.05.007 |
| KeyWord:platinum and palladium concentrate; remove of copper and nickel; separation of platinum and palladium; selective separation of silver; crystal transformation |
| Author | Institution |
| WangLi |
金川集团铜业有限公司 |
| JiTing |
金川集团铜业有限公司 |
| LiRui |
金川集团铜业有限公司 |
| ZhangChuanshan |
金川集团铜业有限公司 |
| FengYan |
金川集团铜业有限公司 |
|
| Hits: 2179 |
| Download times: 2222 |
| Abstract: |
| A new process to separate and refine palladium from complex platinum-palladium concentrate, i.e., removal of copper and nickel, extraction of palladium, silver selective separation, crystal transformation and chemical refining, was developed. Pd with purity of 99.99% above is produced. Compared with traditional technology, Pd recovery rises from 96.12% to 98.55%, production cycle drops by 51.63%, and refining capacity of palladium rises by about 30%. Removal rate of copper and nickel with oxalic acid is 99.8% and 98.8% above respectively under the optimum process parameters including pH value of 1~1.5, temperature of 80~85 ℃, and excess coefficient of 2.0. Platinum and palladium separation efficiency with S201 extraction is 99.9% above and organic phase cycle life is 300 times above by controlling palladium concentration in pre-solution of 6~10 g/L. Silver selective separating from palladium stripping solution is 91% above by controlling pH value of 5~6. Crystal transformation rate of dichlorodiamine palladium exceeds 99.5% within 1~2 h under the optimum conditions including temperature of ≥95 ℃, H+ concentration of 0.5~1 mol/L, and L/S=(5-6)/1. |
| Close |
|
|
|