| [Chen Kunkun,Li Linbo,Cao Qigao and Zhang Bosheng.Separation and enrichment of rhenium from acid washing solutionof copper smelting flue gas[J].Rare Metal Materials and Engineering,2023,52(1):345~350.] |
| Separation and enrichment of rhenium from acid washing solutionof copper smelting flue gas |
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| Received:December 21, 2021 Revised:January 22, 2022 |
| DOI： |
| Key words: Rhenium copper smelting acid washing solution of flue gas ion exchange enrichment |
| Foundation item:国家重点研发计划项目(2018YFC1901704) |
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| Abstract: |
| The acid washing solution of copper smelting flue gas was adsorbed by D296 anion exchange resin, and then Sb was desorbed by ammonia, Bi was desorbed by NaOH and tartaric acid mixed solution, and Re was desorbed by NH4SCN solution. The step-by-step desorption of Re/Sb/Bi was realized and rhenium enrichment solution was obtained. The results show that the potential of acid washing solution has no significant effect on the adsorption rates of Re, Sb and Bi. The appropriate concentration of H2SO4 in acid washing solution is about 43 g.L-1, and the adsorption rates of Re, Sb and Bi are 100%, 6.55% and 89.05%, respectively. The breakthrough capacity and saturation capacity of D296 resin for adsorption of Re are 1.308 g.L-1 and 1.773 g.L-1, respectively, and the utilization rate of resin is 73.77%. Firstly, 12.5% ammonia is used to desorb sb, and 16% NaOH + 140 g.L-1 tartaric acid mixed solution is used to desorb Bi. The hydrolysis of Bi can be effectively inhibited by adding tartaric acid, and then 10% NH4SCN solution is used to desorb Re to obtain rhenium enrichment solution. The concentration of Cu, As, Sb and Bi in rhenium enrichment solution decrease to less than 1 mg.L-1. Re concentration in acid washing solution is enriched four times. |
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