Gold Leaching from Refractory Ores—Literature Survey
Gold Leaching from Refractory Ores—Literature Survey
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从难熔矿石中浸出金——文献调查
DOI：
10.1080/08827508708952607
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发表时间：
1987
影响因子：
5
通讯作者：
K. E. Haque
中科院分区：
文献类型：
--
作者：
K. E. Haque
本文主要是对近年来难处理金矿石的预处理工艺进行综述。当金细嵌在硫化物、砷硫化物、碲化物、碳质和粘土质材料中时，直接碱性氰化法对金的提取是无效的。然而，涉及热氧化如焙烧、化学氧化如酸浸、酸或碱加压浸;或生物氧化如用T.氧化亚铁从难熔矿物中释放出金。然后通过碱性氰化从氧化物质中回收金。除预处理外，用硫脲法或炭浸法直接从含碳金矿石或精矿中回收金也是可行的。最后，对所有主要的预处理工艺进行了评论，并对进一步的研发工作提出了一些建议。
This review is essentially an overview of the pretreatment processes for the refractory gold ores available in the recent literature. When gold is finely disseminated in sulphides, arsenosulphides, tellurides, carbonaceous and clayey materials direct alkaline cyanidation is not effective for gold extraction. However, pretreatment processes involving thermal oxidation, such as roasting, chemical oxidation, such as acid leaching, acid or alkaline pressure leaching; or biological oxidation such as bioleaching with T. Ferrooxidans liberates gold from refractory minerals. Gold is then recovered from the oxidized mass by alkaline cyanidation. Beside pretreatments, direct gold recovery from carbonaceous gold ores or concentrates with thiourea or CIL leach process is also feasible. Finally, some critical comments have been made to all the major pretreatment processes; and some recommendations for further R&D efforts have been suggested.