Effect of biooxidation conditions on cyanide consumption and gold recovery from a refractory gold concentrate

Çiftçi, Hasan; Akçıl, Ata

doi:10.1016/j.hydromet.2010.05.010

Cited by 51 publications

(17 citation statements)

References 21 publications

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“…It means that biooxidation pre-treatment allowed 30 % increase in gold recovery with a cyanide consumption 15 % lower than that observed for the residue from abiotic control. The last result is in contradiction to that usually reported indicating that although the biooxidation pre-treatment achieves better gold recoveries, the cyanide consumption is moderately increased (Ciftci and Akcil, 2010).…”

Section: Cyanide Leaching and Gold Recoverycontrasting

confidence: 99%

“…Biooxidation is a well known technology for the pretreatment of such ores that allows an efficient recovery of dispersed gold by cyanidation method (Muravyov and Bulaev, 2013;Sun et al, 2012a;Sun et al, 2012b). Mixed and pure cultures of acidophilic mesophiles, moderate and even extreme thermophiles have been used for the biooxidation of refractory gold ores; at high pulp densities (used in commercial applications) mesophiles showed better biooxidation potential compared to moderate and extreme thermophiles (Ciftci and Akcil, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Zinc recovery during refractory ore biooxidation by an indigenous consortium

Marchevsky

Urbieta

Bernardelli

et al. 2015

International Journal of Mineral Processing

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Section: Cyanide Leaching and Gold Recoverycontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zinc recovery during refractory ore biooxidation by an indigenous consortium

Marchevsky

Urbieta

Bernardelli

et al. 2015

International Journal of Mineral Processing

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“…This concentration level represents a considerable percentage (39%) of the cyanide being consumed for non-leaching purposes and this may likely be the cause of the suspected cyanide depletion in the column tests after 14 days. Ciftci and Akcil (2010) report a similar effect in their test work which involved the cyanide leaching of bioleached residue concentrate. The first stage of bioleaching was intended to liberate refractory Au minerals for cyanide leaching.…”

Section: High Temperature Cyanide Leachmentioning

confidence: 68%

Assessing a two-stage heap leaching process for Platreef flotation concentrate

2012

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Samples of low-grade flotation concentrate derived from Platreef ore were treated with a two-stage heap leach process to determine the potential to run this process parallel to to the convential concentrate-smelt-refine process for extracting platinum group metals, thereby adding value to the convential process via economic treatment of low-grade materials. Using bench-scale columns, a first stage bioleach achieved extractions of 91.1% Cu, 98.5% Ni and 83.5% Co in a space of 88 days at a temperature of 65°C. Samples of residual concentrate from this process were similarly treated via columns in a second stage leach using cyanide solution, achieving extractions of up to 96.5% Pd, 97.5% Au and 35% Pt in a space of 45 days at 50°C. Mineral liberation analysis of a sample of concentrate from the cyanide leach experiment revealed that the bulk of the remaining Pt was in the form of sperrylite which appeared to leach very slowly in cyanide solution. Further to this, analysis of the cyanide leachate solution showed high levels of thiocyanate

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“…Certain group of chemolithoautotrophic meso-acidophilic bacteria has proved to be the correct answer to biodegradation of pyrite (Acharya et al 2001). Such microorganisms utilize the iron source of pyrite for their growth and metabolism and are frequently used in bioleaching (Sand et al 2001;Ciftci and Akcil 2010). The iron oxidizer Acidithiobacillus ferrooxidans (A. ferrooxidans) is considered to be the industrially important microorganism (Panda et al 2012a;Pradhan et al 2008).…”

Section: Interaction Mechanisms For Inorganic Sulfur Removalmentioning

confidence: 99%