添加强化剂醋酸钠堆浸金的研究

IF 1.5 Q3 Materials Science

Nonferrous Metals Pub Date : 2020-12-29 DOI:10.17580/NFM.2020.02.04

Y. Yessengarayev, B. Baimbetov, B. Surimbayev

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引用次数: 2

摘要

堆浸法是提取黄金最便宜的方法之一。然而，与破碎材料的氰化相比，这种方法的金回收率相对较低，因此寻找强化浸出和提高金回收率的方法是一项紧迫的任务。采用一种有前景的试剂乙酸钠强化堆浸工艺，对Sari-Gunay金矿含金矿石进行了堆浸研究。介绍了氧化矿石的测定重量、化学、矿物学和粒度分析结果。矿石中的平均金含量为2.90g/t。根据电子探针分析，矿石中的金以细小（微米）包裹体的形式存在于矿物和矿石岩石中。对添加醋酸钠和不添加醋酸钠从粒度为–20+0 mm的破碎矿石中堆浸金进行了比较研究。在0.5kg/t的流速下用乙酸钠回收金的程度为58.74%，在没有乙酸钠的情况下为54.69%，即加入试剂可使回收率增加4%以上。添加试剂的浸出也将氰化钠的消耗从0.65千克/吨减少到0.59千克/吨。研究结果表明，当矿石粒度为–20+0 mm时，乙酸钠可用于强化堆浸金过程。

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Studies on heap leaching of gold with the addition of sodium acetate as an intensifying reagent

One of the cheapest methods of extracting gold is heap leaching. However, the recovery of gold by this method is relatively low, compared with cyanidation of the crushed material, so the search for the ways to intensify leaching and increase gold recovery is an urgent task. Investigations on heap leaching of gold from the gold-bearing ore of the Sari Gunay deposit were conducted using a promising reagent sodium acetate to intensify the heap leaching process. The results of assay-gravimetric, chemical, mineralogical and granulometric analyses of oxidized ore are presented. The average gold content in the ore was 2.90 g/t. According to the electron probe analysis, gold in the ore is present in the form of fine (micron) inclusions in minerals and ore rocks. Comparative studies on heap leaching of gold from the crushed ore with a grain size of –20 + 0 mm with the addition of sodium acetate and without that were carried out. The degree of gold recovery with sodium acetate at a flow rate of 0.5 kg/t was 58.74%, that without sodium acetate was 54.69%, i.e. the addition of the reagent provides an increase in recovery of more than 4%. Leaching with the addition of the reagent also reduces sodium cyanide consumption from 0.65 to 0.59 kg/t. The research results have shown that sodium acetate can be used to intensify the process of heap leaching of gold when the ore size is –20+0 mm.

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来源期刊

Nonferrous Metals METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.50

自引率

0.00%

发文量

期刊介绍： Its thematic plan covers all directions of scientific and technical development in non-ferrous metallurgy. The main journal sections include scientific-technical papers on heavy and light non-ferrous metals, noble metals and alloys, rare and rare earth metals, carbon materials, composites and multi-functional coatings, radioactive elements, nanostructured metals and materials, metal forming, automation etc. Theoretical and practical problems of ore mining and mineral processing, production and processing of non-ferrous metals, complex usage of ores, economics and production management, automation of metallurgical processes are widely observed in this journal. "Non-ferrous Metals" journal publishes the papers of well-known scientists and leading metallurgists, elucidates important scientific-technical problems of development of concentrating and metallurgical enterprises, scientific-research institutes and universities in the field of non-ferrous metallurgy, presents new scientific directions and technical innovations in this area. The readers can find in this journal both the articles with applied investigations and with results of fundamental researches that make the base for new technical developments. Publishing according to the approach APC (Article processing charge).