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| Indium Recovery from Indium-bearing Calcium Sulfate Slag |
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Received:June 29, 2017
Revised:July 01, 2017
Accepted:July 04, 2017
Published Online:November 22, 2017
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| DOI：doi：10.3969/j.issn.1007-7545.2017.12.011 |
| KeyWord:indium-bearing calcium sulfate slag; leaching; reduction; indium; extraction; stripping |
| Author | Institution |
| chen xian you |
云南华联锌铟股份有限公司 |
| zhu bei ping |
云南华联锌铟股份有限公司 |
| yao ying xiong |
云南华联锌铟股份有限公司 |
| yang cheng wu |
云南华联锌铟股份有限公司 |
| wang bang wei |
云南华联锌铟股份有限公司 |
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| Abstract: |
| Indium was recovered from indium-bearing calcium sulfate slag by acid leaching, lixivium reduction with iron powder, pretreatment of reduction solution, solvent extraction of indium, and indium stripping. Acidic leaching rate of In is 98% above under conditions of terminal acidity of 70 g/L, temperature of 80 ℃, L/S=4︰1, and leaching time of 2 h. Fe3 reduction rate is 98% above upon iron powder excess coefficient of 1.5. Reduction solution is purified by 8 g/L activated carbon. Extraction rate of In is 97.5% above with In content in raffinate of 4 mg/L below after four-stage countercurrent extraction under the conditions including P204 concentration of 30%, acidity of 70 g/L, A/O=4︰1, mixing time of 3 min, and temperature of 45 ℃. In concentration in stripping solution is 70 g/L above after four-stage countercurrent stripping under the conditions of 6 mol/L hydrochloric acid and A/O=1︰12. |
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