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| Recycling of Chlorine-Containing Caustic Soda Slag during Zinc-Smelting with Jarosite Process |
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Received:September 25, 2010
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| DOI：DOI：10.3969/j.issn.1007-7545.2011.04.001 |
| KeyWord:Jarosite process; Caustic soda slag; Recycling；Zinc；Chlorine; Cadmium |
| Author | Institution |
| SHI Qi-ying |
商洛学院化学与化学工程系 |
| ZHAO Xiao-ru |
陕西锌业有限公司 |
| HE Xue-bin |
陕西锌业有限公司 |
| REN You-liang |
商洛学院化学与化学工程系 |
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| Abstract: |
| The cadmium, contained in the chlorine-containing caustic soda slag from the process of cadmium- recycling during the zinc metallurgy, can be recycled by using hot water dissolving and liquid-solid separation process. The alkali liquor with chlorine entered into the zinc hydrometallurgy flowsheet before vitriol-sinking. When vitriol sinking, the replacement of OH- with Cl- and the hot acid leaching from the copper cadmium slag, as well as the production of CuCl from the copper slag with low-acid washing process can eliminate the harm from Cl-; and still the replacement of NH4+ with Na+ can be fully used. Thus the recovery rate of zinc and cadmium reached up to 99.90%. The trial production proved an ideal economic efficiency and environmental protection benefit. |
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