Selective Recovery of Metals in Gold Refining Processes using Adsorbents.

使用吸附剂在黄金精炼过程中选择性回收金属。

• 批准号: 519841-2017
• 负责人: Rakshit, Sudip
• 金额: $ 1.82万
• 依托单位: Lakehead University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639911
• 关键词: Selective; Recovery; Metals; Gold; Refining

Gold ore processing includes crushing, grinding, leaching by cyanidation, carbon in pulp recovery andelectrowinning. This method is one of the major gold separation procedures used by most such industries.Interference of other metal ions in the ore in upstream and downstream processes has a significant effect on theproduction process efficiency. A substantial amount of heavy metal ions is present in the downstream (tailing)process. This has been identified as a challenge that needs to be overcome. Selective removal of the metal ionsfrom the gold ore in the upstream process before leaching or after leaching will significantly improve goldquality. Separation of these metal ions can lead to a by-product of economic value. We plan to develop and usenovel adsorbents that can specifically recover valuable metals from solution containing mixture of metal ions.Selective recovery of some metal ions from the production line of gold ore will also improve the processingand cost of production. It will enhance the yield and the quality of gold. Interfering metal ions removal beforeleaching or immediately after leaching before refining will enhance gold recovery and will lead to additionalrevenues for the company and the local economy as these metals have a market of their own. The plannedprocedure will also improve the quality of the effluents from the wastewater treatment. In this study, novelenvironmentally friendly adsorbents capable of selective adsorption of heavy metal in a complex mixture ofmetal ions will be developed. The Musslewhite unit of Goldcorp is very keen to address interfering metal ionsissues to increase the efficiency of their process and potentially derive financial benefits from the same. Ourpreliminary studies have shown the novel adsorbents to be effective on laboratory model samples.

金矿石加工包括破碎、磨矿、氰化浸出、矿浆中碳回收和电积。该方法是大多数此类行业采用的主要选金工艺之一，矿石中其他金属离子在上下游工艺中的干扰对生产工艺效率有显著影响.大量的重金属离子存在于下游（尾矿）工艺中。这已被确定为一项需要克服的挑战。在浸提前或浸提后的上游工艺中选择性地去除金矿石中的金属离子将显著提高金的质量。这些金属离子的分离可以产生具有经济价值的副产品。我们计划开发和使用新的吸附剂，专门从含有金属离子的混合溶液中回收有价金属，从金矿生产线中选择性回收某些金属离子，也将改善加工和生产成本。这将提高黄金的产量和质量。在浸提前或浸提后立即在精炼前去除干扰性金属离子将提高黄金回收率，并将为公司和当地经济带来额外收入，因为这些金属有自己的市场。计划的程序也将提高污水处理的出水质量。在本研究中，新型的环境友好的吸附剂能够选择性吸附的重金属在复杂的混合金属离子将被开发。Goldcorp的Musslewhite部门非常热衷于解决干扰金属离子的问题，以提高其工艺效率，并可能从中获得经济利益。我们的初步研究表明，新的吸附剂是有效的实验室模型样品。