process for the treatment of refractory gold concentrates

Process Development for Refractory Gold Concentrates ,

Peter V Zaytsev, Yakov M Shneerson, Process Development for Refractory Gold Concentrates Treatment, carbon flotation is introduced to the Malomir flotation flowsheet in order to remove carbonaceous matter Chemical composition of the Malomir and Pioneer pilot flotation concentrates is shown in Table 2...

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Biooxidation of Mouteh Refractory Gold-Bearing ,

increase gold particle exposure, preliminary treatment of the concentrates is necessary [5,6] Oxidation roasting and aqueous pressure oxidation are two processes that have found widespread industrial application for the treatment of refractory sulphide gold ores [3,7] Bacterial oxidation is ,...

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Bacterial oxidation of refractory gold concentrates ,

Bacterial oxidation is now considered to be a proven commercial technique for the treatment of refractory sulfide gold concentrat Since 1986 the technique has been applied successfully on a commercial scale for the removal of arsenopyrite and pyrite to give high gold extractions on cyanidation (Van Aswegen et al, 1989)A chronology of gold projects, recognized as using agitated aerated ....

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MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY ,

The result of the novel microbial pre-treatment process indicated that sulfide sulfur was degraded under alkaline conditions and carbonaceous matter passivated by T versicolor at its optimum growth conditions This led to a significant improvement in gold extraction from the double refractory gold ore and concentrate investigated...

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Refractory Gold | Mining | SGS

First, the gold recovery to the concentrate should be sufficiently high that the tailings can be discarded without further treatment, and the mass ratio of concentrate to tailings should be low SGS has extensive experience with environmentally sustainable refractory gold extraction...

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OXIDATION OF REFRACTORY GOLD CONCENTRATES AND SIMULTANEOUS ,

Jan 01, 2004· The leaching experiments also have shown that gold may dissolve in alkaline thioarsenite solutions, which provides a possible new process option for the leaching of gold The oxidation of refractory arsenical gold concentrates in aerated alkaline solutions results in the formation of thiosulfate, arsenate and sulfate as well as the dissolution ....

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MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY ,

The result of the novel microbial pre-treatment process indicated that sulfide sulfur was degraded under alkaline conditions and carbonaceous matter passivated by T versicolor at its optimum growth conditions This led to a significant improvement in gold extraction from the double refractory gold ore and concentrate investigated...

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Gold mineral processing - Hatch Ltd

Refractory gold ore pretreatment Treatment of refractory gold ore (whole ore and flotation concentrates) has become more prominent since the 1980s, with many gold discoveries often including ores that are wholly or partially refractory Refractory pre-treatment processes include pressure oxidation, biological oxidation and various forms of ....

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The Leachox Refractory Gold Process

The albion process is an atmospheric leaching process for processing zinc concentrate refractory copper and refractory gold this process is an integration of the ultrafine grinding ufg and oxidative leaching at atmospheric condition mike hourn 2014 the leachox process is essentially a range of established and new unit process steps such as ....

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Novel Processes for the Treatment of Sulphidic Refractory ,

This paper presents initial findings of a project examining novel processes for the treatment of refractory sulphidic gold concentrat Non-oxidative roasting of such concentrates for 12 hours at 750°C resulted in the finely disseminated gold agglomerating to form discrete grains The pyrite and arsenopyrite decomposed to form pyrrhotite, whilst the labile sulphur and arsenic driven....

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Gold recovery from refractory gold concentrates by ,

and could improve gold extraction of flotation concentrate treated by oxidative roasting (Xu et al, 2015) Pressure oxidation technology for the treatment of refractory gold concentrates has been deployed in some countri Shuiyindong gold deposit is one of the Carlin-type deposits which is a typical...

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Process for recovering gold and silver from refractory ores

Referring to FIG 6, it can be seen that gold recovery and concentrate grade (sulfide sulfur) is superior for the conventional process at concentrate grades less than about 4% sulfur but superior for the MCF2 process at concentrate grades higher than about 4% sulfurAt a target concentrate grade of 7% S or greater, the MCF2 process showed approximately 2% higher Au recovery...

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Studies on the bioleaching of refractory concentrates

for the pre-treatment of refractory gold ores and concentrates and the leaching of whole-ore copper heaps In many cases, it offers economic, environmental and technical advantages over pressure oxidation and roasting1,2 However, in order for bioleaching to compete successfully with other pre-treatment processes it needs to be optimized...

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The Leachox Refractory Gold Process

The albion process is an atmospheric leaching process for processing zinc concentrate refractory copper and refractory gold this process is an integration of the ultrafine grinding ufg and oxidative leaching at atmospheric condition mike hourn 2014 the leachox process is essentially a range of established and new unit process steps such as ....

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Process for recovering gold and silver from refractory ores

Referring to FIG 6, it can be seen that gold recovery and concentrate grade (sulfide sulfur) is superior for the conventional process at concentrate grades less than about 4% sulfur but superior for the MCF2 process at concentrate grades higher than about 4% sulfurAt a target concentrate grade of 7% S or greater, the MCF2 process showed approximately 2% higher Au recovery...

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Flowsheet Options - Flowsheet Options | Albion Process

The oxidative leach can be operated under a range of pH conditions, varying from acidic to neutral For the processing of a refractory gold/silver concentrate, the pH of the oxidative leach is held at 55 by the continual addition of limestone slurry to ensure complete oxidation of the sulphur to sulphate...

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pretreatment of refractory sulphide gold ores and concentrates

Refractory Gold Ore Treatment Methods At the plant of the Consolidated Murchison Co in the Transvaal, South Africa, where a refractory high-antimony gold ore is being treated, flotation and cyanidation of the flotation concentrates and tailings are being practiced...

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Pressure Oxidation of a Refractory Sulfide Concentrate and ,

Significant advances have taken place in the treatment of refractory gold ores and concentrates during the past decade In sulfide ores, pyrite is the most common host mineral for gold Studies by Gasparrini (1983) showed that gold occurs in pyrite as native gold or electrum in all sizes and forms Arsenopyrite is probably the second most common host for gold and forms similar associations ....

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Installation for the treatment of refractory gold concentrates

Setting processing of refractory gold concentrates contains module 1 gravity-flotation peredishki the source of the concentrate, leaching the module 2 and module 3 obezbalivaniya gold-bearing solutions that are installed in series along the process and interconnected means of ,...

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ALTA Gold 2012 E-Doc - Albion Process

A significant contemporary challenge for gold mining companies is to define economic process options for treating more complex ore bodies as the less refractory ores become depleted Demonstration of economic treatment options allows gold companies to maintain and increase their...

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Biooxidation - BioMineWiki - Skellefteå

Applications It can be used as a pretreatment process to degrade mineral sulfides such as pyrite or arsenopyrite The most common commercial example is pre-treatment of arsenopyrite refractory gold concentrat The sulphide matrix (arsenopyrite), hosting inclusions of elemental gold particles, is biooxidatedThe matrix surrounding the elemental gold will hence loosen up and partly ....

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AU766123B2 - The recovery of gold from refractory ores and ,

AU766123B2 AU71583/00A AU7158300A AU766123B2 AU 766123 B2 AU766123 B2 AU 766123B2 AU 71583/00 A AU71583/00 A AU 71583/00A AU 7158300 A AU7158300 A AU 7158300A AU 766123 B2 AU766123 B2 AU 766123B2 Authority AU Australia Prior art keywords ores treatment gold characterised carrying out Prior art date 1999-11-17 Legal status (The legal status is an assumption ,...

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Process For The Treatment Of Refractory Gold Ncentrates

Gold mineral processing hatchRefractory gold ore pretreatment treatment of refractory gold ore whole ore and flotation concentrates has bee more prominent since the 1980s, with many gold discoveries often including ores that are wholly or partially refractory refractory pretreatment processes include pressure oxidation, biological oxidation...

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Gold recovery from refractory gold concentrates by ,

and could improve gold extraction of flotation concentrate treated by oxidative roasting (Xu et al, 2015) Pressure oxidation technology for the treatment of refractory gold concentrates has been deployed in some countri Shuiyindong gold deposit is one of the Carlin-type deposits which is a typical...

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MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY ,

The result of the novel microbial pre-treatment process indicated that sulfide sulfur was degraded under alkaline conditions and carbonaceous matter passivated by T versicolor at its optimum growth conditions This led to a significant improvement in gold extraction from the double refractory gold ore and concentrate investigated...

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Installation for the treatment of refractory gold concentrates

Setting processing of refractory gold concentrates contains module 1 gravity-flotation peredishki the source of the concentrate, leaching the module 2 and module 3 obezbalivaniya gold-bearing solutions that are installed in series along the process and interconnected means of ,...

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Process For The Treatment Of Refractory Gold Ncentrates

Gold mineral processing hatchRefractory gold ore pretreatment treatment of refractory gold ore whole ore and flotation concentrates has bee more prominent since the 1980s, with many gold discoveries often including ores that are wholly or partially refractory refractory pretreatment processes include pressure oxidation, biological oxidation...

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Pilot plant pressure oxidation of refractory gold-silver ,

A pilot plant campaign has been conducted by Sherritt Technologies in support of Eldorado Gold Corporation's evaluation of pressure oxidation (POX) technology for the treatment of refractory gold concentrates from the Certej deposit in Romania...

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Process For The Treatment Of Refractory Gold Ncentrates

Gold mineral processing hatchRefractory gold ore pretreatment treatment of refractory gold ore whole ore and flotation concentrates has bee more prominent since the 1980s, with many gold discoveries often including ores that are wholly or partially refractory refractory pretreatment processes include pressure oxidation, biological oxidation...

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Use of Ozone for Gold Extraction from a Highly Refractory ,

When the gold or silver are locked up in the mineral matrix, they remain unrecovered and the ore is classified as refractory to cyanidation Ozonization in acidic media of an arsenopyritic-pyritic highly refractory gold concentrate (110 g Au/t) as a treatment prior to cyanidation was evaluated...

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