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| The status of removal zinc in Bayer process of alumina production |
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Received:October 25, 2016
Revised:October 27, 2016
Accepted:October 31, 2016
Published Online:April 06, 2017
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| DOI： |
| KeyWord:alumina, sulfide, zinc;removal, high;sulfur bauxite |
| Author | Institution |
| Li Junfu |
Yunnan Wenshan Aluminum Industry Co. Ltd. |
| Shi Yingjie |
Kunming University of Science and Technology |
| Li Rongxing |
Faculty of metallurgy and energy engineering, Kunming University of Science and Technology |
| YU Xiaohua |
Kunming University of Science and Technology |
| Zhang Tao |
Kunming University of Science and Technology |
| Xie Gang |
State key laboratory of Common associated non-ferrous metal resources pressure hydrometallurgy technology |
| Qiao Juqi |
Yunnan Wenshan Aluminum Industry Co. Ltd. |
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| Abstract: |
| zinc impurities in bauxite will directly affect the product purity and production targets of alumina. Zinc impurities mainly exist in the form ZnO22- in Bayer production system. The zinc hydroxide amphoteric substances. Therefore, zinc in the Bayer process production system mainly in the form of ZnO22-deposit, coupled with zinc and aluminum in the caustic liquid have very similar chemical behavior, this is the zinc removal in Bayer liquor is extremely difficult. The main method of removal zinc of domestic and foreign is add sulfide especially adding high sulfur bauxite ore to removal zinc and this approach has become a good way to removal of zinc in Bayer. |
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