Effect of mechanical activation on thiosulfate leaching of gold from complex sulfide concentrate

Hashemzadehfini, Mohsen; Ficeriová, Jana; Abkhoshk, Emad; Shahraki, Behrouz Karimi

doi:10.1016/s1003-6326(11)61118-7

Cited by 33 publications

(10 citation statements)

References 27 publications

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“…Analysis of scientific-technical and patent literature shows that the research is directed to problem-solving connected with certain types of materials and special reactant treatments of technological processes. It is obvious that during study of extraction technology of nonferrous metals (Ahmed et al, 2012;Vafaeian et al, 2011), noble metals (Celep et al, 2011;Zhang et al, 2004) in leach (Alonso-Gómez and Lapidus, 2009) and electrolytic processes (Kenzhaliev, 2014;Silva et al, 1994) from sulfide, oxidized, mixed mineral products and concentrates (Feng and Van Deventer, 2006;Hashemzadehfini et al, 2011;Senanayake, 2007), recovered and technogenic materials (Jessop and Turner, 2011), mineralogical particularity of mining aspects is neglected, as a rule, especially in regard to same-name materials, which can vary in their chemical activity in reference to chemical agents and can show physical properties leading to their incomplete usage in technological process. Insufficient attention is paid to interconnection, interdependence in multicomponent systems both in solid state during thin interpenetration of different minerals and during leach, sorption and electrolytic processes (Jeffrey et al, 2005).…”

Section: Literature Reviewmentioning

confidence: 99%

Research of the Interacting Process of Copper-Base Alloys with Leaching Solutions under the Action of Different Physicochemical Factors

Kenzhaliyev¹,

Berkinbayeva²,

Sharipov³

2015

American Journal of Applied Sciences

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Analysis of the current scientific and technical data shows the increased difficulty in innovative solutions development for metal extraction from different kinds of mineral raw materials, due to fundamental change in mineral resources base of metallurgy. Apart from polymetallic ores, complex in chemistry and intractable, the basis for the current mineral resources base is formed by technogenic production waste, so-called recovered materials. The source for nonferrous metals is not only mineral but also recovered materials. The possibility of copper and zinc extraction from recovered materials, particularly from latten, widely-used in technology, has been examined. The article studies influence of different physicochemical factors on the process of dissolution of copper-base alloys by cathode and anode polarization of a sulfur-graphite electrode. It is specified that copper and zinc extraction by cathode polarization is 25 and 30% respectively. During the solution process, copper is oxidized and sulfurized and complex zinc sulfates are formed, which prevent metals from further dissolution. Electrolyte concentration, current density and temperature contribute to metal solubility increase. It is shown that the difference in leach process of metal alloys and polymetallic minerals is connected both with metal alloys' structure and mechanism of metals' solution in nonorganic aqua solution. The results of the phase analysis prove that sulfide and copper oxides and hydrated zinc sulfate, i.е., zinc dissolution is made via formation of sulfates.

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Section: Literature Reviewmentioning

confidence: 99%

Research of the Interacting Process of Copper-Base Alloys with Leaching Solutions under the Action of Different Physicochemical Factors

Kenzhaliyev¹,

Berkinbayeva²,

Sharipov³

2015

American Journal of Applied Sciences

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“…For gold encapsulated in arsenopyrite or pyrite, pretreatments are necessary in order to break or alter the matrix of the sulfide (Chryssoulis and McMullen, 2005;Climo et al, 2000;Hashemzadehfini et al, 2011). The most common techniques include pre-aeration, roasting, high pressure oxidation and biological oxidation.…”

Section: Introductionmentioning

confidence: 99%

Pretreatment of a refractory arsenopyritic gold ore using hydroxyl ion

Espitia

Lapidus

2015

Hydrometallurgy

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“…Consequently, the performance of reagents is highly limited, despite the use of various reagents at different conditions (i.e., acidic and/or basic) [17][18][19]. Pre-treatments are required to improve gold recovery at economically viable levels [20,21]. Moreover, the beneficiation techniques such as gravity separation, flotation, roasting, high pressure oxidation, and biological oxidation are the most common techniques used in the gold industry to extract refractory gold [15,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%

CIL Gold Loss Characterization within Oxidized Leach Tails: Creating a Synergistic Approach between Mineralogical Characterization, Diagnostic Leach Tests, and Preg-Robbing Tests

et al. 2019

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A double refractory gold ore contains gold particles locked in sulphides, solid-solution in arsenopyrite, and preg-robbing material such as carbonaceous matter, and so on. The diagnostic leach test (DLT) and preg-robbing (PR) approaches are widely used to investigate the occurrence and the distribution of refractory gold. DLT serves to qualitatively evaluate the gold occurrences within the ore. Preg-robbing, or the ore’s capacity to fix dissolved gold, is evaluated to determine physical surface interactions (preg-borrowing) and chemical interactions (preg-robbing). The objective of this project is to characterize the refractory gold in Agnico Eagle Mine’s Kittilä ore using the DLT and PRT approaches coupled with mineralogical analyses to confirm testing. The studied material was sampled from the metallurgical circuit following carbon in leach (CIL) treatment at the outlet of the autoclave in order to investigate the effect of the autoclave treatment on the occurrence and distribution of gold. Different reagents were used in the DLT procedure: sodium carbonate (Na2CO3), sodium hydroxide (NaOH), hydrochloric acid (HCl), and nitric acid (HNO3). The final residue was roasted at a temperature of around 900 °C. These reagents were selected based on the mineralogical composition of the studied samples. After each leaching test/roasting, cyanide leaching with activated carbon was required to recover gold cyanide. The results show that gold is present in two forms (native and/or refractory): to a small extent in its native form and in its refractory form as association with sulfide minerals (i.e., arsenopyrite and pyrite) and autoclave secondary minerals that have been produced during the oxidation and neutralization processes such as iron oxides, iron sulfates, and calcium sulfate (i.e., hematite and jarosite), along with carbonaceous matter. The results of DLT indicate that 25–35% of the gold in the tails is nonrecoverable, as it is locked in silicates, and 20–40% is autoclave products. A regrind can help to mitigate the gold losses by liberating the Au-bearing sulphide minerals encapsulated within silicates.

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Effect of mechanical activation on thiosulfate leaching of gold from complex sulfide concentrate

Cited by 33 publications

References 27 publications

Research of the Interacting Process of Copper-Base Alloys with Leaching Solutions under the Action of Different Physicochemical Factors

Research of the Interacting Process of Copper-Base Alloys with Leaching Solutions under the Action of Different Physicochemical Factors

Pretreatment of a refractory arsenopyritic gold ore using hydroxyl ion

CIL Gold Loss Characterization within Oxidized Leach Tails: Creating a Synergistic Approach between Mineralogical Characterization, Diagnostic Leach Tests, and Preg-Robbing Tests

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