| Collector matching in origin potential flotation |
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| 作者姓名： | 顾帼华 王晖 邱冠周 胡岳华 |
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| 作者单位： | SchoolofResourceProcessingandBioengineering,CentralSouthUniversity,Changsha410083,China |
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| 基金项目： | Project(2 0 0 14 5 )supportedbyaFoundationfortheAuthorofNationalExcellentDoctoralDissertationofChina，projectsup portedbytheTeachingandResearchAwardProgramforOutstandingYoungTeachersinHigherEducationInstitutionsofMOE |
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| 摘 要： | Through thermodynamic calculation and electrochemistry analysis~ taking the galena as example,the ba-sis for collector matching in origin potential flotation (OPF) was studied. The results of thermodynamic calculation show that the upper limit value of pH and flotation potential of diethyldithiocarbamate (DDTC) is higher than that of xanthogenate (KBX), which indicates that the collecting ability of DDTC for galena is better than that of KBX.The results of the interface capacitance analysis show that lead diethyldithiocarbamate (PbD2) is more steady than lead xanthogenate (Pb(BX)2) on the galena surface under the oxidation condition; the resistance analysis shows thatD2 (DDTC oxidizes into its dimmer) and dixanthogen (BX)2 will occur non-faradic desorption on the pyrite electrodesurface when the potentials are above 0.13 V and 0.2 V respectively. A synthetical criterion ΔE of collecting ability and selectivity was proposed. The results predicted by this criterion are confirmed through flotation experiments of ore.
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| 关 键 词： | 捕集剂 配比 电场浮选 选矿 浮选药剂 方铅矿 |
Collector matching in origin potential flotation |
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| GU Guo-hua,WANG Hui,QIU Guan-zhou,HU yue-hua.Collector matching in origin potential flotation[J].Transactions of Nonferrous Metals Society of China,2004,14(3):576-581. |
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| Authors: | GU Guo-hua WANG Hui QIU Guan-zhou HU yue-hua |
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| Abstract: | Through thermodynamic calculation and electrochemistry analysis, taking the galena as example, the basis for collector matching in origin potential flotation (OPF) was studied. The results of thermodynamic calculation show that the upper limit value of pH and flotation potential of diethyldithiocarbamate (DDTC) is higher than that of xanthogenate (KBX), which indicates that the collecting ability of DDTC for galena is better than that of KBX.The results of the interface capacitance analysis show that lead diethyldithiocarbamate (PbD2) is more steady than lead xanthogenate (Pb(BX)2) on the galena surface under the oxidation condition; the resistance analysis shows that D2 (DDTC oxidizes into its dimmer) and dixanthogen (BX)2 will occur non-faradic desorption on the pyrite electrode surface when the potentials are above 0.13 V and 0.2 V respectively. A synthetical criterion △Eof collecting ability and selectivity was proposed. The results predicted by this criterion are confirmed through flotation experiments of ore. |
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| Keywords: | origin potential flotation collector galena |
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