|
| Experiments on Hydrometallurgical Process for Extraction of Water-Soluble Zinc from Leaching Residues |
|
Received:April 15, 2019
Revised:April 22, 2019
Accepted:April 22, 2019
Published Online:June 17, 2019
|
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2019.07.007 |
| KeyWord:zinc; Pb-Ag residue; jarosite residue; washing; solvent extraction |
| Author | Institution |
| XIE Keng |
北京矿冶科技集团有限公司 |
| WANG Haibei |
北京矿冶科技集团有限公司 |
| LIU Sanping |
北京矿冶科技集团有限公司 |
| SU Li-feng |
北京矿冶科技集团有限公司 |
|
| Hits: 2279 |
| Download times: 2126 |
| Abstract: |
| Address to high content of water-soluble zinc in Pb-Ag residue and jarosite residue produced by zinc hydrometallurgy, washing-purification-solvent extraction process was adopted to recover zinc. Effects of reaction temperature, acidity and time on zinc recovery were investigated to obtain the optimum process conditions. Zinc recovery in Pb-Ag residue and jarosite residue is 61.4% and 79.6% respectively when washing is carried out at room temperature with L/S=5, washing water acidity of 5 g/L and washing time of 30 min. Solution after washing is neutralized and purified with hydrated lime as neutralizer by controlling final pH value at 4.0. Iron in solution can be completely precipitated and removed, while zinc loss is 0.9% below. Zinc extraction rate of three-stage countercurrent extraction is 96% above under the conditions including organic phase composition of 30% P204+70% sulfonated kerosene, extraction ratio O/A=2/3, and extraction time of 3 min. Zinc-rich solution is obtained by stripping with zinc electrowinning lean solution. This hydrometallurgical process is simple in operation and realizes resource utilization of water-soluble zinc entrained in zinc leaching residues. It can be integrated with the original zinc process. |
| Close |