| Electrode process of diethyldithiocarbamate on surface of pyrrhotite |
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| 作者姓名： | 黎维中 覃文庆 邱冠周 董清海 |
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| 作者单位： | School of Resources Processing and Bioengineering，Central South University，Changsha 410083，China，School of Resources Processing and Bioengineering，Central South University，Changsha 410083，China，School of Resources Processing and Bioengineering，Central South University，Changsha 410083，China，General Research Institute for Nonferrous Metals，Beijing 100088，China |
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| 摘 要： | 1INTRODUCTION Inthepastdecade,muchprogresshasbeen madeinunderstandingthereactionsofasulfidemineralsurfacewithxanthateagents.Manyelec trochemicaltechniqueshavebeenemployedto studythereactionmechanismofsulfideminerals(suchaspyrite,galenaandchalcopyrite)with xanthatereagents14].Theseinvestigationsindi catethattheoxidationofboththemineralandthe collectorplaysanimportantroleintheflotationprocess.Itisgenerallybelievedthatthereactions producethehydrophobicparticlesurfacesrequired inflotation.It…
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| 关 键 词： | 磁黄铁矿 电极 二乙基二硫代氨基甲酸钠 DDTC 选矿工艺 电场浮选 |
| 文章编号： | 1005-9784（2005）04-0416-04 |
| 收稿时间： | 2005-02-28 |
| 修稿时间： | 2005-04-20 |
Electrode process of diethyldithiocarbamate on surface of pyrrhotite |
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| Li Wei-zhong , Qin Wen-qing , Qiu Guan-zhou and Dong Qing-hai.Electrode process of diethyldithiocarbamate on surface of pyrrhotite[J].Journal of Central South University of Technology,2005,12(4):416-419. |
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| Authors: | Li Wei-zhong Qin Wen-qing Qiu Guan-zhou and Dong Qing-hai |
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| Affiliation: | (1) School of Resources Processing and Bioengineering, Central South University, 410083 Changsha, China;(2) General Research Institute for Nonferrous Metals, 100088 Beijing, China |
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| Abstract: | The electrode process of diethyldithiocarbamate on the surface of pyrrhotite was studied using systematic electrochemical analysis, including cyclic voltammetry, chronopotentiometry and galvanostatic. Experimental results show that tetraethylthioram disulphide(TETD) is electrodeposited on pyrrhotite electrode surface in the presence of 1.0×10-4 mol/L diethyldithiocarbamate when the electrode potential is higher than 0.25 V. The electrochemical kinetics parameters of the electrode process of diethyldithiocarbamate on surface of pyrrhotite are calculated as follows: the exchange current density is 2.48 μA/cm2, and the transmission coefficient is 0.46. The electrodeposition includes two steps electrochemical reaction. The first reaction is electrochemical adsorption of diethyldithiocarbamate ion, then the adsorbed ion associates with a diethyldithiocarbamate ion from the solution and forms tetraethylthioram disulphide on the surface of pyrrhotite. |
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| Keywords: | electrode process pyrrhotite diethyldithiocarbamate |
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