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- W2523203535 abstract "The present work investigates the mineralogical and chemical characteristics of a refractory gold (Au) ore (Eburnean Tectonic Province, Ghana) which sometimes display poor carbon-in-leach (CIL) Au extraction behaviour. Currently, the plant feed ores to the leach circuit is prepared by flotation concentrate treatment involving biological oxidation (BIOX), followed by BIOX product wash. To understand and diagnose the cause(s) of low Au recovery, detailed mineralogical (QXRD), optical, shape, size and phase discrimination (OM, laser diffraction and SEM), and bulk (XRF/laser ablation- MS, ICP-OES) and surface (EDTA) chemical characterisation of run-of-mine (ROM), flotation concentrate (FC), pre-wash BIOX product (BIOX U), low Au recovery post-wash (BIOX L), and high Au recovery post-wash (BIOX H) products were investigated. The results show that, the ore is complex sulphidic and comprises quartz (45%), chlorite group, plagioclase feldspar, dolomite, mica group, olivine group, pyrite, siderite, and rutile as major and minor minerals. Chemical analyses showed Au enrichment in sulphides (arsenopyrite, pyrite). Poor Au leach recovery from BIOX L could be ascribed to cyanicides (chalcopyrite, pyrite, etc.) and passivation (jarosite, beudantite, etc.)." @default.
- W2523203535 created "2016-09-30" @default.
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- W2523203535 date "2014-01-01" @default.
- W2523203535 modified "2023-09-23" @default.
- W2523203535 title "Characterisation of tectonic refractory gold ore" @default.
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