| Potential control flotation of galena in strong alkaline media |
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| 引用本文： | 顾帼华,胡岳华,邱冠周,王晖,王淀佐. Potential control flotation of galena in strong alkaline media[J]. 中南工业大学学报(英文版), 2002, 9(1): 16-20. DOI: 10.1007/s11771-002-0004-4 |
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| 作者姓名： | 顾帼华 胡岳华 邱冠周 王晖 王淀佐 |
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| 作者单位： | [1]DepartmentofMineralEngineering,CentralSouthUniversity,Changsha410083,China [2]BeijingGeneralResearchInstituteforNonferrousMetals,Beijing100083,China |
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| 基金项目： | TheNationalScienceFundforDistinguishedYoungScholars(No.5 992 5 4 12 ) |
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| 摘 要： | The electrochemical oxidation of galena in collectorless and collector flotation systems, particularly in strong alkaline media, was studied. The results show that, with pH value higher than 12.5 and potentials below 0.17 V, the oxidation products of galena are elemental sulfur and HPbO2^- . Elemental sulfur was present on the mineral surface in excess of oxidized lead species due to dissolution of HPbO2^- , which is beneficial to the flotation of galena. Under the same conditions, sphalerite and pyrite were depressed as a result of significant surface oxidation. Diethyldithioearbamate (DDTC) was found to be the most suitable collector for galena flotation in strongly alkaline media. The very potential produced hydrophobic PbD2-the surface reaction produet of DDTC with galena, is 0 to 0.2 V. Meantime DDTC can depress the surface over-oxidation of galena.Investigations also indicate that, in the range of - 0.9 V to 0.6 V, hydrophobic PbD2 can be firmly adsorbed on galena.
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| 关 键 词： | 方铅矿 电化学氧化 强碱介质 DDTC 可控浮选 |
| 收稿时间： | 2001-08-01 |
Potential control flotation of galena in strong alkaline media |
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| Gu Guo-hua , Hu Yue-hua , Qiu Guan-zhou , Wang Hui and Wang Dian-zuo. Potential control flotation of galena in strong alkaline media[J]. Journal of Central South University of Technology, 2002, 9(1): 16-20. DOI: 10.1007/s11771-002-0004-4 |
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| Authors: | Gu Guo-hua Hu Yue-hua Qiu Guan-zhou Wang Hui Wang Dian-zuo |
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| Affiliation: | (1) Department of Mineral Engineering, Central South University, 410083 Changsha, China;(2) Beijing General Research Institute for Nonferrous Metals, 100083 Beijing, China |
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| Abstract: | The electrochemical oxidation of galena in collectorless and collector flotation systems, particularly in strong alkaline media, was studied. The results show that, with pH value higher than 12.5 and potentials below 0.17 V, the oxidation products of galena are elemental sulfur and HPbO 2 − . Elemental sulfur was present on the mineral surface in excess of oxidized lead species due to dissolution of HPbO 2 − , which is beneficial to the flotation of galena. Under the same conditions, sphalerite and pyrite were depressed as a result of significant surface oxidation. Diethyldithiocarbamate (DDTC) was found to be the most suitable collector for galena flotation in strongly alkaline media. The very potential produced hydrophobic PbD2—the surface reaction product of DDTC with galena, is 0 to 0.2 V. Meantime DDTC can depress the surface over-oxidation of galena. Investigations also indicate that, in the range of − 0.9 V to 0.6 V, hydrophobic PbD2 can be firmly adsorbed on galena. Foundation item: The National Science Fund for Distinguished Young Scholars(No. 59925412); Biography of the first author: GU Guohua, associate professor, doctor, majoring in the natural resources multipurpose use and electrochemical flotation. |
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| Keywords: | galena potential control flotation collector |
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