|
| Removal of antimony from low-purity lead bullion by dynamic process based on the oxygen-controlling method under vacuum condition |
|
Received:March 22, 2019
Revised:April 18, 2019
Accepted:April 19, 2019
Published Online:August 26, 2019
|
| View Full Text View/Add Comment Download reader |
| DOI： |
| KeyWord:jamesonite ore;low-purity lead bullion; antimony; separation; vacuum. |
| Author | Institution |
| BAO ZHI QUN |
Kunming Metallurgical Institute |
| FU BANG BANG |
School of Chemistry and Chemical Engineering, Central South University, |
| QIU KE QIANG |
School of Chemistry and Chemical Engineering, Central South University |
|
| Hits: 3766 |
| Download times: 2358 |
| Abstract: |
| Low-purity lead bullion containing about 15% by weight antimony is a byproduct obtained in treating jamesonite ore in China. Up to now, the electrolytic refining is the only process for treating the low-purity lead bullion to product pure lead. However, the low-purity lead bullion contains only 80–85% by weight lead, leading to a lot of serious drawbacks such as high energy consumption, the poor efficiency of electrolytic refining, diffculty of treating high-antimony anode slimes in the subsequent process and so on. The previous selective removal of antimony may contribute to improve the current situation. Therefore, dynamic process based on the oxygen-controlling method under vacuum condition, a new method to remove antimony from low-purity lead bullion, was developed in this work. The experimental results revealed that the antimony content from low-purity lead bullion decreased from14.37% to 0.38%. Namely, 97.87% by weight of antimony can be removed and the PbO content in the distillate is below 1% under following experimental conditions: melt temperature of 933K, vacuum treatment time of 210 min, and air flow rate of 3L/min, corresponding to the residual gas pressure of 13KPa. |
| Close |
|
|
|