Abstract

The features of forms of occurrence of gold in technogenic raw materials—lying clinker of zinc production of the Belovsky Zinc Plant (Belovo, Kemerovo oblast)—are considered in the paper. The Belovsky plant operated from 1930 to 2003 using zinc concentrates from the Salair Mining and Concentration Plant. After the shutdown of the plant, the clinker dumps were stored at the plant’s industrial site and were repeatedly washed with acidic solutions to isolate copper. This form of storage and leaching has led to the transformation of the forms of noble metals found in clinker, which currently makes it difficult to extract gold. The gold content in clinker is at the level of 2–3 g/t, which makes gold recovery profitable. The presence of carbon in clinker complicates the known methods of both analytical detection of gold and its recovery. A method is proposed for determining the forms of occurrence and content of gold, taking into account the fact that gold may be present in the form of free fine gold and gold finely disseminated in iron and its oxides, in sulfide phases, in the quartz-silicate part of the clinker, and in the carbonaceous phase. It is shown that, depending on the storage conditions and the previous acid treatment, the forms of gold in the clinker change, which affects the choice of the technological scheme for processing the material. The share of gold available for leaching is at least 40%. The increased associativity of gold with the coal (flotation) phase and the sorption activity of coal brings significant interference into the study of the properties of gold forms in clinker, which requires preliminary carbon removal.

中文翻译：

---

锌生产熟料中贵金属存在的特点

摘要

本文考虑了金在工艺原料中的赋存形式特征——位于别洛夫斯基锌厂（别洛沃，克麦罗沃州）的锌生产熟料。Belovsky 工厂从 1930 年运营到 2003 年，使用来自 Salair Mining and Concentration Plant 的锌精矿。工厂关闭后，熟料堆放在工厂的工业场地，并用酸性溶液反复清洗以分离铜。这种储存和浸出形式导致熟料中发现的贵金属形态发生转变，这使得目前很难提取黄金。熟料中的金含量为 2-3 克/吨，这使得黄金回收有利可图。熟料中碳的存在使金的分析检测及其回收的已知方法复杂化。考虑到金可能以游离纯金和金微散布于铁及其氧化物、硫化物相、石英-熟料的硅酸盐部分，以及碳质相。结果表明，根据储存条件和前次酸处理，熟料中金的形态会发生变化，从而影响材料加工工艺方案的选择。可用于浸出的黄金份额至少为 40%。金与煤（浮选）相的缔合性增加以及煤的吸着活性对熟料中金形态的性质的研究造成了重大干扰，这需要预先除碳。