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Study of the behaviour of Au in oxide ores during thiosulfate leaching

硫代硫酸盐浸出氧化矿石中Au行为的研究

基本信息

批准号：
434421-2012
负责人：
Lipkowski, Jacek
金额：
$ 3.31万
依托单位：
University of Guelph
依托单位国家：
加拿大
项目类别：
Collaborative Research and Development Grants
财政年份：
2014
资助国家：
加拿大
起止时间：
2014-01-01 至 2015-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=552680
关键词：
Study behaviour Au oxide ores

项目摘要

The objective of this project is to develop a novel methodology to investigate the interactions between thiosulfate, complex ore samples and Au to better understand the complex behaviour that occurs during the industrial process of Au extraction called leaching. A novel ring-Au disk-mineral electrode will be fabricated to study Au and mineral interactions in the presence of thiosulfate and to study thiosulfate interactions with both Au and the mineral surface. Electrochemical techniques will be employed to study the Au leaching kinetics as well as the rate of formation of a passive layer that impedes the leaching kinetics in the presence of different minerals. Spectroscopic techniques will then be employed to identify the nature of the passive layer responsible for limiting the Au leaching kinetics. Using this ring-disk electrode we will identify the mineral(s) responsible for increased thiosulfate oxidation and passive layer formation. This knowledge is essential for the development of the ore pretreatment methodology mitigating these effects and increasing the Au leaching kinetics. Several additives to the lixiviant solution that have been previously identified to enhance Au leaching will be investigated in order to comparatively determine the role of each additive in the presence of different minerals. The information sought in this project will be essential for assisting the Canadian Au industry, specifically Barrick Gold Inc in development of new environmentally-friendly Au extraction processes.

该项目的目的是开发一种新的方法来研究硫代硫酸盐、复杂矿石样品和Au之间的相互作用，以更好地了解在称为浸出的Au提取工业过程中发生的复杂行为。将制备一种新型的环-Au盘-矿物电极来研究在硫代硫酸盐存在下Au和矿物的相互作用，并研究硫代硫酸盐与Au和矿物表面的相互作用。电化学技术将被用来研究Au浸出动力学以及在不同矿物存在下阻碍浸出动力学的钝化层的形成速率。光谱技术，然后将被用来确定的性质的钝化层负责限制Au浸出动力学。使用这种环盘电极，我们将确定负责增加硫代硫酸盐氧化和钝化层形成的矿物质。这些知识对于减轻这些影响和提高Au浸出动力学的矿石预处理方法的发展是必不可少的。为了比较确定每种添加剂在不同矿物存在下的作用，将研究先前已确定可增强Au浸出的浸提剂溶液的几种添加剂。本项目所寻求的信息对于协助加拿大Au行业，特别是Barrick Gold Inc开发新的环境友好型Au提取工艺至关重要。