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方铅矿高碱浮选流程的电化学
引用本文:顾帼华,胡岳华,邱冠周,王晖,王淀佐.方铅矿高碱浮选流程的电化学[J].矿冶工程,2002,22(1):52-55.
作者姓名:顾帼华  胡岳华  邱冠周  王晖  王淀佐
作者单位:1. 中南大学,矿物工程系,湖南,长沙,410083
2. 北京有色金属研究总院,北京,100088
基金项目:全国优秀博士学位论文作者专项资金资助 (2 0 0 1 4 5),国家杰出青年基金资助 (5992 541 2 )
摘    要:研究了方铅矿在无捕收剂和有捕收剂浮选体系中 ,尤其是在强碱性介质中的电化学行为。结果表明 :pH >12 .5 ,电位Eh <0 .17V条件下 ,方铅矿的表面氧化产物是S0 和HPbO2 -,同时由于HPbO2 -的溶解 ,方铅矿表面会出现S0 过剩 ,过剩S0 的疏水作用有利于方铅矿浮选 ;而此时闪锌矿、黄铁矿由于过渡氧化而受抑制。二乙基二硫代氨基甲酸盐 (DDTC)是方铅矿最有效的捕收剂。DDTC和方铅矿作用生成疏水产物二乙基二硫代氨基甲酸铅 (PbD2 )的合适电位是 0~ 0 .2V ,同时 ,DDTC的存在还会抑制方铅矿表面的过度氧化 ,疏水产物PbD2 在矿物表面牢固吸附 ,在 -0 .9~ 0 .6V电位范围内稳定存在

关 键 词:方铅矿  电化学  捕收剂  原生电位浮选
修稿时间:2001年10月26

Electrochemistry of Galena in Hight Alkaline Flotation
GU Guo hua ,HU Yue hua ,QIU Guang zhou ,WANG Dian zuo.Electrochemistry of Galena in Hight Alkaline Flotation[J].Mining and Metallurgical Engineering,2002,22(1):52-55.
Authors:GU Guo hua  HU Yue hua  QIU Guang zhou  WANG Dian zuo
Affiliation:GU Guo hua 1,HU Yue hua 1,QIU Guang zhou 1,WANG Dian zuo 2
Abstract:Electrochemical behaviour is studied of galena in collectorless or collector flotation system,especially in high alkalinity media(pH=12.8). It has been shown that at pH>12.5 and E h<0.17 V,S 0 and HPbO 2 - are oxidation products on the surface of galena, and the former is excessive due to the latter's dissolution. The excess sulfur has hydrophobic effect, which is advantageous to galena flotation. At the same time, sphalerite and pyrite are depressed due to their overoxidation.Diethyldithiocarbamate(DDTC) is the most suitable collector for galena and the suitable potential at which DDTC and galena react each other to form PbD 2 ranges from 0 to 0.2 V. Moreover, DDTC can depress the surface overoxidation of galena surface. Also,the study has shown that in the range of -0.9 to 0.6 V,the hydrophobic PbD 2 can be firmly adsorbed on the surface of galena.
Keywords:galena  electrochemistry  collector  original potential
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