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煤中金因其可异常聚集而日益受到重视,其潜在的经济价值又为该贵金属来源提供了新的途径。详细分析了前人对煤中金研究的相关文献,就煤中金的丰度、分布、成因及其工业前景进行了较全面的阐述,并重点讨论了煤中金异常聚集的地质机制,认为存在河流或大气降尘带入泥炭沼泽、同沉积过程中有机物质吸附富集和后生成因等3种主要的富集机制,且当煤被灰化后灰分中金会进一步富集,其富集度可以高出原煤的几倍,甚至几十倍,达到工业利用价值。深入揭示金在煤炭加工利用过程中的迁移、聚集的机制,发展煤中金的提取技术是很有必要的、前瞻性的工作,也是进行煤中伴生金地质经济评价的基础。
Gold in coal is increasingly valued because of its abnormal aggregation, and its potential economic value provides a new way for the precious metal source. This paper analyzes in detail the previous literature on the study of gold in coal, and gives a more comprehensive exposition on the abundance, distribution, causes and industrial prospects of gold in coal and focuses on the geological mechanism of gold anomalous aggregation in coal, There are three kinds of major enrichment mechanisms, such as river or atmospheric dustfall into the peat swamp, adsorption and enrichment of organic substances during the process of sedimentation and subsequent genesis, and when the coal is ashed, the ash will be further enriched, and its enrichment Degree can be several times higher than the original coal, or even dozens of times, to achieve industrial use value. It is very necessary and forward-looking work to further reveal the mechanism of gold migration and accumulation in coal processing and utilization and to develop gold extraction technology in coal, which is also the basis for the evaluation of geological gold associated with coal.