ABSTRACT The cyanidation process is used for the recovery of gold and silver from their ores. However, during cyanidation, some of the copper minerals present are also dissolved, resulting in the presence of copper impurities in the form of cuprocyanide complexes. A high copper content in solution decreases the recovery of precious metals, mainly due to zinc passivation during gold/silver cementation. The objective of this work is to study the effect on copper electrowinning of the cyanide/copper molar ratio, the potential applied to the electrolytic cell, the temperature and circulation rate of the solution, and the use of synthetic solutions with physicochemical characteristics similar to those of an industrial solution. The experiments were carried out in electrolytic reactors using different regimes (i.e. batch and continuous). The results obtained indicate that an applied potential of 4 V at temperatures above of 25°C, significantly increases the amount of copper removed, while high cyanide concentrations resulted in low levels of copper removal. Furthermore, the intensification of the agitation of the solution increases the amount of copper removed due to enhanced mass transfer conditions. Copper removal in the continuous reactor was of approximately 50%. Metallic copper was deposited on the cathode and copper oxide and copper hydroxide on the anode.

中文翻译：

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使用间歇式和连续式流动池通过电解提取从氰化液中去除铜。

摘要 氰化工艺用于从矿石中回收金和银。然而，在氰化过程中，一些存在的铜矿物也被溶解，导致以亚铜氰化物络合物的形式存在铜杂质。溶液中的高铜含量会降低贵金属的回收率，这主要是由于金/银胶结过程中的锌钝化。这项工作的目的是研究氰化物/铜摩尔比、施加到电解槽的电位、溶液的温度和循环速率以及使用具有类似于这些物理化学特性的合成溶液对铜电解的影响。的工业解决方案。实验在电解反应器中使用不同的方式（即间歇和连续）进行。获得的结果表明，在高于 25°C 的温度下施加 4 V 的电压会显着增加去除的铜量，而高氰化物浓度导致铜去除量较低。此外，由于增强的传质条件，溶液搅拌的加剧增加了去除的铜量。连续反应器中的铜去除率约为 50%。金属铜沉积在阴极上，氧化铜和氢氧化铜沉积在阳极上。由于增强的传质条件，溶液搅拌的加强会增加铜的去除量。连续反应器中的铜去除率约为 50%。金属铜沉积在阴极上，氧化铜和氢氧化铜沉积在阳极上。由于增强的传质条件，溶液搅拌的加强会增加铜的去除量。连续反应器中的铜去除率约为 50%。金属铜沉积在阴极上，氧化铜和氢氧化铜沉积在阳极上。