gold pressure oxidation

A FUNDAMENTAL STUDY OF THE ACIDIC PRESSURE OXIDATION OF ORPIMENT AND …

A FUNDAMENTAL STUDY OF THE ACIDIC PRESSURE OXIDATION OF ORPIMENT AND …

ABSTRACT The acidic pressure oxidation of pyrite (FeS 2) and orpiment (As 2S 3), as a pretreatment of refractory gold ores, has been studied by investigating the reaction chemistry and kinetics. The effects of retention time, temperature, particle size, oxygen

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Gold Recovery from Electronic Waste by Pressure Oxidation

Gold Recovery from Electronic Waste by Pressure Oxidation

Gold recovery by pressure oxidation Recovery of gold was reached oxidizing the metal substrate (Fe, Ni, and Cu) where gold was superficially associated as coating. Substrate oxidation was performed using different concentration (0.66-1.31 M) of (NH 4) 2 S 2 O ...

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Pressure Oxidation Leaching Process

Pressure Oxidation Leaching Process

Batch Autoclave Laboratory Procedures: The vessel used for the laboratory pressure oxidation process was a two-liter Parr titanium autoclave with dual impellers. It was heated and cooled externally and was pressurized with commercial-grade oxygen. A positive bleed of offgas was maintained in each test; the rate was measured in the offgas after the steam was removed with a condenser and ...

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Alkaline Pressure Oxidation of a Gold-Bearing …

Alkaline Pressure Oxidation of a Gold-Bearing …

abstract = "The aqueous pressure oxidation of gold bearing arsenopyrite concentrates in alkaline solution was investigated as a function of O2 pressure and NaOH concentration. Dissolution of gold from the leach residue was accomplished by standard cyanidation.

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Autoclave Pressure Oxidation Gold Au

Autoclave Pressure Oxidation Gold Au

Pressure oxidation of gold ores is therefore a pretreatment leaching step to enhance gold recovery although pressure oxidation of gold ores and concentrates does not directly recover gold in a strict sense of the above definition it is an essential step to enable the ...

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Pilot plant pressure oxidation of refractory gold-silver …

Pilot plant pressure oxidation of refractory gold-silver …

Pilot plant pressure oxidation of refractory gold-silver concentrate from Eldorado Gold Corporation''s Certej Project in Romania T. Chan Sherritt Technologies, Sherritt International Corporation, 8301-113 Street, Fort Saskatchewan, AB, T8L 4K7, Canada, M. Collins Sherritt Technologies, Sherritt International Corporation, 8301-113 Street, Fort Saskatchewan, AB, T8L 4K7, …

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PRESSURE OXIDATION OF PYRITE-ARSENOPYRITE REFRACTORY GOLD …

PRESSURE OXIDATION OF PYRITE-ARSENOPYRITE REFRACTORY GOLD …

Pressure oxidation of pyrite-arsenopyrite refractory gold concentrate 105 350 kPa, 15%) or increased very slowly (test 3, 165 C, 1050 kPa, 5%). At higher tem-perature and oxygen pressure the oxygen consumption was more rapid and reached a steady level in 55

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Pressure oxidation

Pressure oxidation

Pressure Oxidation is a process for extracting gold from refractory ore. The most common refractory ores are pyrite and arsenopyrite, which are sulfide ores that trap the gold within them. Refractory ores require pre-treatment before the gold can be adequately extracted. [1]

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Gold Recovery from Electronic Waste by Pressure Oxidation

Gold Recovery from Electronic Waste by Pressure Oxidation

Gold recovery by pressure oxidation Recovery of gold was reached oxidizing the metal substrate (Fe, Ni, and Cu) where gold was superficially associated as coating. Substrate oxidation was performed using different concentration (0.66-1.31 M) of (NH 4) 2 S 2 O ...

Get price
Optimisation of Circuits for Gold Pressure Oxidation

Optimisation of Circuits for Gold Pressure Oxidation

Pressure oxidation is one method of rendering the ores more suitable for cyanidation. The focus of this work is optimisation of autoclave configuration for pressure oxidation. An autoclave for the pressure oxidation of a feed containing pyrite and arsenopyrite was modelled, using the …

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Pressure Oxidation Pretreatment of Refractory Gold | …

Pressure Oxidation Pretreatment of Refractory Gold | …

Pressure oxidation of gold containing concentrates and ores is an effective pretreatment for liberating refractory gold. This is particularly true when an appreciable portion of the gold is associated with sulfides and is not amenable to conventional cyanidation. A brief review of the literature on pressure oxidation of refractory gold materials is presented. The chemistry of the aqueous ...

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pressure oxidation gold leach

pressure oxidation gold leach

Pressure oxidation (POX), high pressure oxidation (HiPOX) and ACTIVOX autoclave leaching are viable industry-standard technologies used to recover gold and other accessory metals. Read more The process is particularly well suited for treating refractory gold ores, which give low recovery when directly leached with cyanide.

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pressure oxidation refractory gold

pressure oxidation refractory gold

Pressure oxidation of refractory gold ores and concentrates Faster reaction kinetics and smaller process equipment than biooxidation and High gold recoveries 95 possible over a wide range of feed composition 15 to 40 wt S 01 to 20 wt As and sulphide ...

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What is PRESSURE OXIDATION? What does PRESSURE …

What is PRESSURE OXIDATION? What does PRESSURE …

 · What is PRESSURE OXIDATION? What does PRESSURE OXIDATION mean? PRESSURE OXIDATION meaning - PRESSURE OXIDATION defini...

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Pressure Oxidation Pretreatment of Refractory Gold | …

Pressure Oxidation Pretreatment of Refractory Gold | …

Pressure oxidation of gold containing concentrates and ores is an effective pretreatment for liberating refractory gold. This is particularly true when an appreciable portion of the gold is associated with sulfides and is not amenable to conventional cyanidation. A brief review of the literature on pressure oxidation of refractory gold materials is presented. The chemistry of the aqueous ...

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ACID PRESSURE OXIDATION OF REFRACTORY GOLD …

ACID PRESSURE OXIDATION OF REFRACTORY GOLD …

 · ABSTRACT Acid pressure oxidation is currently strongly advocated as the most effective pretreatment method for refractory gold ores and concentrates. Arsenopyrite and pyrite are the most common mineral carriers of refractory gold. Pressure oxidation of these refractory gold mineral carriers is a very complex reaction system involving several oxidation and hydrolytic reactions which occur in ...

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PRESSURE OXIDATION OF REFRACTORY GOLD ORES: THE …

PRESSURE OXIDATION OF REFRACTORY GOLD ORES: THE …

Pressure oxidation is employed to liberate gold and silver in refractory sulfide concentrates often and ores. The main pressure oxidation products from iron sulfide minerals are sulfuric acid (and metal

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Pressure Oxidation Process

Pressure Oxidation Process

Outotec can provide a complete pressure oxidation plant including all auxiliary processes for refractory gold sulfide oxidation. Gold is efficiently released from the sulfide matrix for the subsequent leaching process, whether cyanidation or chloride leaching. The

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Polymetal to expand pressure oxidation gold treatment …

Polymetal to expand pressure oxidation gold treatment …

"Pressure oxidation was selected as the most feasible processing technology for double refractory ores. It is able to achieve gold recoveries of 96% by utilising high temperatures, elevated pressure and oxygen to recover encapsulated gold, while conventional cyanidation methods would result in sub-optimal recovery rates of 20-40%.

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Gold extraction

Gold extraction

Generally, recovery of the gold from the sulfide concentrates requires further processing, usually by roasting or wet pressure oxidation. These pyrometallurgical or hydrometallurgical treatments are themselves usually followed by cyanidation and carbon adsorption techniques for …

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Gold deportment and leaching study from a pressure …

Gold deportment and leaching study from a pressure …

Pressure oxidation (POX) is an effective method for base metal extraction and a pretreatment of refractory gold ores. A residue from pressure leaching of chalcopyrite concentrate was collected and investigated for gold recovery and deportment of metals.

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pressure oxidation refractory gold

pressure oxidation refractory gold

Pressure Oxidation is a process for extracting gold from refractory ore The most common refractory ores are pyrite and arsenopyrite which are sulfide ores that trap the gold within themRefractory ores require pre-treatment before the gold can be adequately extracted ...

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Gold extraction

Gold extraction

Gold extraction refers to the processes required to extract gold from its ores.This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore. Gold mining from alluvium ores was once achieved by techniques associated with placer mining such as simple gold panning and sluicing, resulting in direct recovery of ...

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pressure oxidation refractory gold

pressure oxidation refractory gold

Pressure oxidation of refractory gold ores and concentrates Faster reaction kinetics and smaller process equipment than biooxidation and High gold recoveries 95 possible over a wide range of feed composition 15 to 40 wt S 01 to 20 wt As and sulphide ...

Get price
Optimisation of Circuits for Gold Pressure Oxidation

Optimisation of Circuits for Gold Pressure Oxidation

Pressure oxidation is one method of rendering the ores more suitable for cyanidation. The focus of this work is optimisation of autoclave configuration for pressure oxidation. An autoclave for the pressure oxidation of a feed containing pyrite and arsenopyrite was modelled, using the …

Get price
A FUNDAMENTAL STUDY OF THE ACIDIC PRESSURE OXIDATION OF ORPIMENT AND …

A FUNDAMENTAL STUDY OF THE ACIDIC PRESSURE OXIDATION OF ORPIMENT AND …

ABSTRACT The acidic pressure oxidation of pyrite (FeS 2) and orpiment (As 2S 3), as a pretreatment of refractory gold ores, has been studied by investigating the reaction chemistry and kinetics. The effects of retention time, temperature, particle size, oxygen

Get price
Autoclave Pressure Oxidation Gold Au

Autoclave Pressure Oxidation Gold Au

Pressure oxidation of gold ores is therefore a pretreatment leaching step to enhance gold recovery although pressure oxidation of gold ores and concentrates does not directly recover gold in a strict sense of the above definition it is an essential step to enable the ...

Get price
Optimisation of Circuits for Gold Pressure Oxidation

Optimisation of Circuits for Gold Pressure Oxidation

Pressure oxidation is one method of rendering the ores more suitable for cyanidation. The focus of this work is optimisation of autoclave configuration for pressure oxidation. An autoclave for the pressure oxidation of a feed containing pyrite and arsenopyrite was modelled, using the …

Get price
What is PRESSURE OXIDATION? What does PRESSURE …

What is PRESSURE OXIDATION? What does PRESSURE …

 · What is PRESSURE OXIDATION? What does PRESSURE OXIDATION mean? PRESSURE OXIDATION meaning - PRESSURE OXIDATION defini...

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Pressure Oxidation Process

Pressure Oxidation Process

Outotec can provide a complete pressure oxidation plant including all auxiliary processes for refractory gold sulfide oxidation. Gold is efficiently released from the sulfide matrix for the subsequent leaching process, whether cyanidation or chloride leaching. The

Get price
Sun High Pressure Oxidation Of Refractory Gold Minerals

Sun High Pressure Oxidation Of Refractory Gold Minerals

Pressure Oxidation Of Refractory Gold Ores The 2014101Pressure oxidation is employed to liberate gold and silver in refractory sulfide concentrates often and ores The main pressure oxidation products from iron sulfide minerals are sulfuric acid and metal ...

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Pressure Oxidation

Pressure Oxidation

Valves For Autoclaves Pressure Oxidation Pox 2018-9-27for the refractory ore is autoclave pressure oxidation POX. This method is often used in the extraction of gold in cases where the gold is trapped in sulphide minerals such as pyrite and arsenopyrite.

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Gold deportment and leaching study from a pressure …

Gold deportment and leaching study from a pressure …

Pressure oxidation (POX) is an effective method for base metal extraction and a pretreatment of refractory gold ores. A residue from pressure leaching of chalcopyrite concentrate was collected and investigated for gold recovery and deportment of metals. A ...

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(PDF) Pressure oxidation of double refractory gold …

(PDF) Pressure oxidation of double refractory gold …

Pressure oxidation is one of the most common and reliable methods of processing gold sulfide concentrates. It allows effective sulfides decomposition, thus eliminating the primary ...

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US5489326A

US5489326A

A process for recovering gold from a refractory auriferous ore containing sulfide sulfur. An aqueous slurry of refractory auriferous ore is subjected to pressure oxidation in an autoclave while the distribution of oxygen to the various compartments of the autoclave is ...

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Optimisation of Circuits for Gold Pressure Oxidation

Optimisation of Circuits for Gold Pressure Oxidation

Pressure oxidation is one method of rendering the ores more suitable for cyanidation. The focus of this work is optimisation of autoclave configuration for pressure oxidation. An autoclave for the pressure oxidation of a feed containing pyrite and arsenopyrite was modelled, using the …

Get price
Pressure Oxidation Plants For Gold Mining

Pressure Oxidation Plants For Gold Mining

Valves For Autoclaves Pressure Oxidation Pox 2018-9-27for the refractory ore is autoclave pressure oxidation POX. This method is often used in the extraction of gold in cases where the gold is trapped in sulphide minerals such as pyrite and arsenopyrite.

Get price
Gold deportment and leaching study from a pressure …

Gold deportment and leaching study from a pressure …

 · The gold grade is 3.1 g/t, with 0.31% residual copper in the sample. Hematite was a dominant iron oxide (31.5%), and iron sulfate salts (45.4%) existed in various minerals phases. The gold deportment study revealed that 32.3% of the total gold was present as a visible gold, and the remainder was sub-microscopic gold.

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US5489326A

US5489326A

A process for recovering gold from a refractory auriferous ore containing sulfide sulfur. An aqueous slurry of refractory auriferous ore is subjected to pressure oxidation in an autoclave while the...

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