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| Effect of oxygen mass transfer on iron removal by goethite process in Zinc Hydrometallurgy |
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Received:October 09, 2020
Revised:October 14, 2020
Accepted:October 20, 2020
Published Online:May 13, 2021
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| DOI： |
| KeyWord:zinc hydrometallurgy; goethite process; oxygen; aeration; iron removal by oxidation |
| Author | Institution |
| SU Kaimeng |
School of Metallurgy and Energy Engineering,Kunming University of Science and Technology |
| XIE Keqiang |
School of Metallurgy and Energy Engineering,Kunming University of Science and Technology |
| MAO Zhidan |
School of Metallurgy and Energy Engineering,Kunming University of Science and Technology |
| YUAN Xiaolei |
School of Metallurgy and Energy Engineering,Kunming University of Science and Technology |
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| Abstract: |
| reduction-oxidation process (V.M. goethite process) is used in zinc hydrometallurgy to remove iron ions from oxygen pressure leaching solution of zinc sulfide concentrate, and the influence of different aeration modes and oxygen flow rate on iron removal process is explored. It is found that the mass transfer of oxygen has a significant effect on the process of iron removal by oxidation, and the effect of intensified stirring on the mass transfer of oxygen is small. However, aeration can greatly improve the dispersion of oxygen, increase the mass transfer of oxygen, and accelerate the oxidation rate of Fe2+, so as to improve the iron removal efficiency. The results show that when the oxygen flow rate is more than 1 L/min, the oxygen flow rate has little effect on the iron removal; when no seed crystal is added, a large number of amorphous substances are formed in the aeration oxidation iron removal, which may be the hot metal compound (5Fe2O3.9H2O), which hinders the transformation of the precipitate to goethite due to its adsorption of other ions. The research results will have a certain reference value for iron removal by reduction oxidation method (V.M. goethite process) in zinc hydrometallurgy. |
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