Electrochemical behavior of galena in the presence of calcium and sulfate ions

被引：22
|
作者：
Manuel Flores-Alvarez, Jose [1 ,2 ]
Araceli Elizondo-Alvarez, Martha [1 ]
Ivone Davila-Pulido, Gloria [3 ]
Daniel Guerrero-Flores, Angel [1 ]
Uribe-Salas, Alejandro [1 ]
机构：
[1] IPN, CINVESTAV, Unidad Saltillo, AP 663, Ramos Arizpe 25900, Coahuila, Mexico
[2] Univ Colima, Fac Ingn Mecan & Elect, Carr Colima Coquimatlan,Km 9, Coquimatlan 28400, Colima, Mexico
[3] Univ Autonoma Coahuila, Escuela Super Ingn, Nueva Rosita, Coahuila, Mexico
来源：
MINERALS ENGINEERING | 2017年 / 111卷
关键词：
Galena; Calcium; Sulfate; Xanthate; Carbon paste electrodes; CARBON-PASTE ELECTRODES; ANODIC-DISSOLUTION; CYCLIC VOLTAMMETRY; PERCHLORATE MEDIUM; ETHYL XANTHATE; LEAD SULFIDE; FLOTATION; WATER; CHALCOPYRITE; ADSORPTION;
D O I：
10.1016/j.mineng.2017.06.014
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A study of the electrochemical behavior of galena and the effect of the Ca2+ and SO42- species on the mineral behavior at different pH, was carried out using carbon paste electrodes. The Ca2+ and SO42- ions were used to simulate the species that are most concentrated in the recycled water of sulfide mineral flotation processes. By means of electrochemical and SEM analysis, it was possible to identify the chemical species that are generated on the mineral surface by means of redox reactions. In the same way, it was observed that depending on the pH, Ca2+ and CaOH+ species interact with the oxidized species of galena. Furthermore, at acidic pH, sulfate reacts with lead ions to form a passivating layer on the surface of the mineral, while at alkaline pH more than one species is generated on the mineral, which passivate its surface.
引用
收藏
页码：158 / 166
页数：9
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