Galvanic Interaction Studies on Sulphide Minerals
Galvanic Interaction Studies on Sulphide Minerals
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DOI：
10.1179/cmq.1988.27.4.253
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发表时间：
1988-10
影响因子：
0.9
通讯作者：
S. Rao;J. Finch
中科院分区：
文献类型：
--
作者：
S. Rao;J. Finch
摘要通过电化学技术研究了两种硫化物矿物相互接触时发生的电偶相互作用，其中包括：黄铁矿、黄铜矿、方铅矿和闪锌矿。黄铁矿电极与第二硫化物的电流接触的组合电位显着低于单独的黄铁矿的休息电位。这表明电子转移到黄铁矿，使其更还原。黄铜矿方铅矿电偶也得到了类似的结果，黄铜矿与方铅矿的电偶作用使黄铜矿变得更还原，而在含氮水中，由于溶解氧的活性较低，电偶作用减弱。这表现为：（a）在充氮水中，黄铁矿与另一种硫化物发生电接触时，电位降要小得多;（B）Zn ~（2+）离子释放到溶液中：在充氮水中，闪锌矿-黄铁矿混合物中Zn ~（2+）离子的溶解减少;（c）黄药在黄铁矿-闪锌矿混合物中的吸收增加。
Abstract Galvanic interactions occurring when two sulphide minerals are in contact with each other have been investigated by electrochemical techniques for pairs of the following: pyrite, chalcopyrite, galena and sphalerite. Combination potentials of pyrite electrodes in galvanic contact with a second sulphide were significantly lower than the rest potential of pyrite alone. This suggested electron transfer to pyrite which makes it more reducing. Similar results were obtained with the chalcopyrite galena couple, chalcopyrite becomes more reducing by galvanic interaction with galena.Galvanic interactions are weakened in nitrogenated water due to the lower activity of dissolved oxygen. This is shown by: (a) much smaller drop in potential when pyrite is in galvanic contact with another sulphide in nitrogenated water; (b) Zn2+ ions released into solution: dissolution of Zn2+ ions in sphalerite pyrite mixtures is decreased in nitrogenated water; and (c) xanthate uptake at pyrite-sphalerite mixtures is increase...