| Influences of silver sulfide on the bioleaching of chalcopyrite, pyrite and chalcopyrite-containing ore |
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| 作者姓名： | 胡岳华 王军 邱冠周 王淀佐 |
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| 作者单位： | [1]DepartmentofMineralEngineering,CentralSouthUniversity,Changsha410083,China [2]CenterofEnvironmentalSciences,BeijingUniversity,Beijing100871,China |
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| 基金项目： | TheNationalScienceFundforDistinguishedYoungScholar(No .5 992 5 4 12 ) |
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| 摘 要： | The effects of silver sulfide (Ag2S) on the bioleaching of chalcopyrite and pyrite were investigated in this paper. It has been shown that Ag2S enhanced the yields of bioleaching of chalcopyrite but inhibited the bio-oxidation of pyrite. The addition of Ag:S selectively increased the copper dissolution from the chalcopyritecontaining ores in shake flasks with a recovery of 85.3 % compared with 24.3 % without Ag2S, while slightly decreased the iron yields from 51% to 41.8%. The copper extraction of the chalcoopyrite-containing waste rock in column leaching charged with 18 kg mass increased up to 21.7% in the presence of Ag2S, while only 3.4% in the absence of the catalyst. The mechanism of Ag2S catalysis could be explained well by the “Mixedpotential model”.
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| 关 键 词： | 硫化银 黄铜矿 黄铁矿 生物滤化 催化作用 |
| 收稿时间： | 10 March 2001 |
Influences of silver sulfide on the bioleaching of chalcopyrite, pyrite and chalcopyrite-containing ore |
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| Hu Yue-hua , Wang Jun , Qiu Guan-zhou and Wang Dian-zuo.Influences of silver sulfide on the bioleaching of chalcopyrite, pyrite and chalcopyrite-containing ore[J].Journal of Central South University of Technology,2002,9(1):11-15. |
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| Authors: | Hu Yue-hua Wang Jun Qiu Guan-zhou and Wang Dian-zuo |
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| Affiliation: | (1) Department of Mineral Engineering, Central South University, 410083 Changsha, China;(2) Center of Environmental Sciences, Beijing University, 100871 Beijing, China |
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| Abstract: | The effects of silver sulfide (Ag2S) on the bioleaching of chalcopyrite and pyrite were investigated in this paper. It has been shown that Ag2S enhanced the yields of bioleaching of chalcopyrite but inhibited the bio-oxidation of pyrite. The addition of Ag2S selectively increased the copper dissolution from the chalcopyrite-containing ores in shake flasks with a recovery of 85.3%
compared with 24.3% without Ag2S, while slightly decreased the iron yields from 51% to 41.8%. The copper extraction of the chalcoopyrite-containing waste
rock in column leaching charged with 18 kg mass increased up to 21.7% in the presence of Ag2S, while only 3.4% in the absence of the catalyst. The mechanism of Ag2S catalysis could be explained well by the “Mixed potential model”.
Foundation item: The National Science Fund for Distinguished Young Scholar(No. 59925412)
Biography of the first author: HU Yue-hua, professor, born in 1962, majoring in mineral processing and bio-processing of minerals. |
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| Keywords: | silver sulfide catalysis chalcopyrite containing ores bioleaching |
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