Study of the Effect of Dissolved Oxygen Concentration on Gold Recovery Leaching at PT Indo Muro Kencana

Equilibrium Journal of Chemical Engineering Pub Date : 2023-11-27 DOI:10.20961/equilibrium.v8i1.78333

Frideni Yushandiana Putri GF, Wilson Pauru', Sulaeman

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Abstract

Gold is a very important metal in human life. Most gold is processed using the cyanidation method. The most commonly used cyanidation method is the agitation leaching method. The cyanidation method will produce aurocyanide complexes that will be further processed, with activated carbon adsorption stages using the carbon in leach method to increase gold recovery. To maximize leach recovery, optimization of leaching and carbon adsorption process parameters is carried out, one of which is dissolved oxygen (DO) levels. Oxygen is added to oxidize gold atoms (Au) into cations (Au+) which will then react with cyanide ions (CN-) to form the aurocyanide complex anion Au(CN)2- dissolved in cyanide solution. To optimize leaching, various testworks were carried out by varying the operating parameters in the leaching process. This study used dissolved oxygen variations derived from oxygen injection with a recovery of 92.5% Au and 80.5% Ag, hydrogen peroxide achieved a recovery of 92.5% Au and 79.9% Ag, and Aachen sheared with a recovery of 95% Au and 81.9% Ag.keyword: Gold, Cyanidation, Dissolved Oxygen, Percent Recovery

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PT Indo Muro Kencana 公司溶解氧浓度对黄金回收浸出的影响研究

金是人类生活中非常重要的金属。大多数黄金都是用氰化法加工的。最常用的氰化法是搅拌浸出法。氰化法将产生呋喃氰化物络合物，这些络合物将进一步加工，在活性炭吸附阶段使用碳浸出法提高金的回收率。为了最大限度地提高浸出回收率，对浸出和碳吸附工艺参数进行了优化，其中一个参数是溶解氧（DO）水平。氧气的加入会将金原子（Au）氧化成阳离子（Au+），然后与氰化物离子（CN-）反应，形成溶解在氰化物溶液中的乌氰络合阴离子 Au(CN)2-。为了优化沥滤，通过改变沥滤过程中的操作参数进行了各种试验。本研究使用的溶解氧变化来源于氧气注入，金的回收率为 92.5%，银的回收率为 80.5%；双氧水的金回收率为 92.5%，银的回收率为 79.9%；亚琛剪切法的金回收率为 95%，银的回收率为 81.9%。关键词：金、氰化法、溶解氧、回收百分比

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Equilibrium Journal of Chemical Engineering

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