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| The Investigation of Applying Organic Agent for Cobalt Removal to Hydrometallurgical Process of Zinc |
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Received:May 06, 2019
Revised:October 31, 2019
Accepted:May 13, 2019
Published Online:December 24, 2019
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| DOI： |
| KeyWord:hydrometallurgical extracting zinc; cobalt removal agent; purification; application. |
| Author | Institution |
| Zheng Shuping |
Analytical & Testing Center, Sichuan University |
| Ren Rui |
School of Chemical Engineering, Sichuan University |
| Yan Xiye |
School of Chemical Engineering, Sichuan University |
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| Abstract: |
| The cobalt removal efficiencies of OACR on different purifying conditions in hydrometallurgical process of zinc have been investigated. After residual OACR in purified solution had been absorbed by activated carbon, the purified solution was analyzed with IR, cathodic polarization and some physical properties such as viscosity, surface tension and so on. The results show: OACR can efficiently remove cobalt from purifying solution at wide range of operating conditions, most of residual OACR in purified solution can be absorbed by activated carbon. The cathodic reduction potential of zinc in absorbed solution was equal to that in pure zinc sulphate solution. Meanwhile, the potential of cathodic hydrogen evolution from absorbed solution was a little larger than that from pure zinc sulphate solution. All the cathodic polarization results indicated that the absorbed solution as the ingredients of electrolyte will not cause the negative effect on electrolysis process of zinc. It can be found form the results of simulated electrolysis experiments that the current efficiency of electrodepositing zinc by using purified solution as the ingredients of electrolyte was no less than that by using pure zinc sulphate solution as he ingredients of electrolyte. It can be concluded that applying OACR to hydrometallurgical extractive zinc will improve the cobalt removal efficiency in purifying step with little negative effect on electrodepositing zinc. |
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