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| Oxidation Roasting of Sphalerite at Low Temperature with CaCO3 |
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Received:March 20, 2017
Revised:March 24, 2017
Accepted:March 27, 2017
Published Online:July 17, 2017
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| DOI：doi：10.3969/j.issn.1007-7545.2017.08.001 |
| KeyWord:sphalerite; zinc hydrometallurgy; oxidation roasting; ammonia leaching |
| Author | Institution |
| GAO Xiao-bing |
昆明理工大学 冶金与能源工程学院 |
| HUA Yi-xin |
昆明理工大学 冶金与能源工程学院 |
| XUN Cun-ying |
昆明理工大学 冶金与能源工程学院 |
| KUANG Wen-hao |
昆明理工大学 冶金与能源工程学院 |
| ZHANG Zheng |
昆明理工大学 冶金与能源工程学院 |
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| Abstract: |
| Pretreatment of oxidation roasting at low temperature with CaCO3 for two kinds of sphalerite was proposed. The results show that sphalerite in sample No.1 with 11.46%Zn is completely transformed into easily soluble ZnO, sulfur is fixed as CaSO4 by CaCO3 when roasted at 300 ℃ for 3 h. Leaching rate of zinc in calcine of No.1 sample in NH3-(NH4)2SO4-H2O system at 45 ℃ for 1 h is 100.0%. However, for No.2 sample with 49.25%Zn, the leaching rate of zinc is only 91.76% under the same conditions due to its complex mineral composition. |
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