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Outokumpu HydroCopper~(TM) Process A Novel Concept in Copper Production

机译:奥托昆普HydroCopper〜(TM)工艺在铜生产中的新概念

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摘要

At Outokumpu Research various hydrometallurgical processing routes have been studied for copper recovery from sulphide concentrates, both in sulphate and chloride environments. The utilisation of chloride solutions is advantageous due to their aggressiveness in leaching and the stability of the cuprous ion. However, the electrowinning of copper from chloride solutions promotes dendritic copper deposits, making operations somewhat complicated in an electrolytic diaphragm cell. To overcome this drawback a novel process has been developed, in which cuprous oxide is precipitated with sodium hydroxide from the purified pregnant leach solution. Sodium hydroxide is regenerated in a chlor-alkali cell. The other products of the electrolytic cell are also recirculated, chlorine gas to concentrate leaching and hydrogen gas to the reduction of cuprous oxide to metallic copper. In this paper, the experimental work and evaluations of the different process options are discussed. To verify the technology Outokumpu will design and construct a demonstration plant in Pori, Finland. Operations will start in early 2003.
机译:在奥托昆普研究公司,研究了各种湿法冶金工艺路线,以从硫酸盐和氯化物环境中的硫化物精矿中回收铜。氯化物溶液的利用是有利的,这是因为它们在浸提中具有侵蚀性和亚铜离子的稳定性。然而,氯化物溶液中铜的电解沉积会促进树枝状铜的沉积,使电解隔膜电池的操作有些复杂。为了克服该缺点,已经开发了一种新颖的方法,其中用氢氧化钠从纯化的母浸出溶液中沉淀出氧化亚铜。氢氧化钠在氯碱电池中再生。电解池的其他产品也进行再循环,用氯气浓缩浸出,用氢气将氧化亚铜还原成金属铜。在本文中,讨论了不同工艺选项的实验工作和评估。为了验证该技术,奥托昆普将在芬兰波里设计并建造一个示范工厂。业务将于2003年初开始。

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