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| Extraction Germanium from Low-grade Germanium-bearing Coal Ash by Reduction Volatilization |
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Received:September 23, 2014
Revised:September 28, 2014
Accepted:September 29, 2014
Published Online:February 15, 2015
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| DOI：10.3969/j.issn.1007-7545.2015.02.014 |
| KeyWord:coal ash; germanium; roasting; reducing volatilization |
| Author | Institution |
| jinmingya |
广州有色金属研究院 |
| chenshaochun |
广州有色金属研究院 |
| caohongyang |
广州有色金属研究院 |
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| Abstract: |
| Germanium was enriched by reduction volatilization from germanium-bearing coal ash from lignite volatilization roasting with carbon as heating and reducing agents. The effects of particle size of coal ash and pellet, roasting temperature and duration, and reducing atmosphere on germanium volatilization rate were investigated. The results show that reducing atmosphere has greater impact on germanium volatilization than particle size of coal ash and pellet. Germanium volatilization rate is higher at strong reducing atmosphere within limits. Germanium volatilization rate is 99.33% above when roasted at 1 000 ℃ for 2 hours without supplemental oxygen and activated carbon. |
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