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首页> 外文期刊>South African Journal of Geology: Being the Transaction of the Geological Society of South African: Syndie die Verhandelinge van die Geologiese Vereniging van Suid-Afrika >A geometallurgical characterization study of the Crystalkop Reef at the Great Noligwa Mine, Klerksdorp Goldfield, South Africa
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A geometallurgical characterization study of the Crystalkop Reef at the Great Noligwa Mine, Klerksdorp Goldfield, South Africa

机译：南非Klerksdorp Goldfield的伟大Noligwa矿区结晶礁石的几何冶金特征研究

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摘要

Mineralogical and textural variability of ores from different sources commonly leads to processing inefficiencies, particularly when a processing plant is designed to treat ore from a single source (i.e. ore of a relatively uniform composition). The bulk of the Witwatersrand ore in the Klerksdorp goldfield, processed at the AngloGold Ashanti Great Noligwa treatment plant, is derived from the Vaal Reef (>90%), with a comparatively small contribution obtained from the Crystalkop Reef (or C-Reef). Despite the uneven contribution, it is of critical importance to ensure that the processing parameters are optimized for the treatment of both the Vaal and C-Reefs. This paper serves to document the results of a geometallurgical study of the C-Reef at the Great Noligwa gold mine in the Klerksdorp goldfield of South Africa, with the primary aim of assessing the suitability of the processing parameters that are in use at the Great Noligwa plant. The paper also draws comparisons between the C-Reef and the Vaal Reef A-facies (Vaal Reef) and attempts to explain minor differences in the recovery of gold and uranium from these two sources. Three samples of the C-Reef were collected in-situ from the underground operations at Great Noligwa mine for mineralogical analyses and metallurgical tests. Laboratory-scale leach tests for gold (cyanide) and uranium (sulphuric acid) were carried out using dissolution conditions similar to that in use at the Great Noligwa plant, followed by further diagnostic leaching in the case of gold. The gold in the ore was found to be readily leachable with recoveries ranging from 95% to 97% (as opposed to 89% to 93% for the Vaal Reef). Additional recoveries were achieved in the presence of excess cyanide (96% to 98%). The recovery of uranium varied between 72% and 76% (as opposed to 30% to 64% for the Vaal Reef), which is substantially higher than predicted, given the amount of brannerite in the ore, which is generally regarded as refractory. Thus, the high
机译：来自不同来源的矿石的矿物学和纹理可变性通常导致处理效率低下，特别是当处理厂设计以从单个源处理矿石时（即相对均匀的组合物的矿石）。在Klerksdorp Goldfield中的大部分Witwatersrand Ore在anglogold Ashanti Great Noligwa治疗厂中的源自Vaal Reef（> 90％），从结晶礁（或C-Reef）获得的相对小的贡献。尽管贡献不均匀，但确保优化了处理参数以用于治疗VAAL和C-REEF的处理是至关重要的。本文旨在记录南非Klerksdorp Goldfield的Great Noligwa Gold Mine的C-Reef的几何冶金研究结果，主要目的是评估在伟大的Noligwa中使用的加工参数的适用性植物。本文还借鉴了C-Reef和Vaal Reef A-Face（Vaal Reef）之间的比较，并试图解释来自这两个来源的黄金和铀的恢复的微小差异。将三个C-Reef样品从大型Noligwa Mine的地下行动原位收集，用于矿物学分析和冶金测试。使用类似于在伟大的Noligwa植物中使用的溶解条件进行金（氰化物）和铀（硫酸）的实验室型浸出试验，随后在黄金的情况下进一步诊断浸出。发现矿石中的黄金可易浸出，回收率范围为95％至97％（而不是Vaal Reef的89％至93％）。在过量的氰化物存在下达到额外的回收率（96％至98％）。铀的回收率在72％和76％之间（而不是Vaal Reef的30％至64％），其基本上高于矿石中的Brannerite的量，这通常被认为是难治性的。因此，高

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