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Of Thiosulfate In Gold Leaching

Sep 04 2011018332I heard that you can leach it out with sodium thiosulfate which makes a strong complex of gold ions to make AuS2O323 Is there a way you can get it out of this form PS I know there is a way because it is used in gold leaching as an alternative to cyanide in mining operations

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A Study Of Thiosulfate Leaching Of Gold From Carbonaceous

A Study Of Thiosulfate Leaching Of Gold From Carbonaceous

A comparison of thiosulfate with cyanide leaching of gold from carbonaceous ore showed that thiosulfate is chemically better and economically more advantageous Description Online access for this thesis was created in part with support from the Institute of Museum and Library Services IMLS administered by the Nevada State Library Archives

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A Review Of Ammoniacal Thiosulfate Leaching Of Gold An

A Review Of Ammoniacal Thiosulfate Leaching Of Gold An

This literature review provides an update of ammoniacal thiosulfate as a potential lixiviant of gold the history of thiosulfate leaching and recent progress on thiosulfate leaching of gold as well as the production oxidation and stabilization of thiosulfate The leaching results of different types of gold ores including oxide sulfide

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Thiosulphate Stability In Gold Leaching Process

Thiosulphate Stability In Gold Leaching Process

Ammonium thiosulphate is an alternative gold leaching Laaviant used to replace cyanide The current problem of thiosulphate gold leaching is the high reagent consumption To understand the decomposition chemistry of thiosulphate solution stability tests were conducted in open and sealed vessek mder ambient temperature

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Anodic Oxidation Of Thiosulfate Ions In Gold Leaching

Anodic Oxidation Of Thiosulfate Ions In Gold Leaching

The regularities of anodic oxidation of thiosulfate ions on a gold electrode have been investigated using electrochemical methods in order to improve gold extraction Effects of ammon copperammon ions pH and sulphite on anodic oxidation of thiosulfate ions have been examined in details Results show that the anodic oxidation of thiosulfate ions is an inreversible reaction whose oxidizing

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Effect Of Additives On Thiosulfate Leaching Of A Gold Ore

Effect Of Additives On Thiosulfate Leaching Of A Gold Ore

In a resininleach system full gold recovery was also achievable with sufficient resin after 24 h leach with 006 M fresh ammonium thiosulfate and 2 mM EDTA at an agitation speed of 250 rmin Key words Gold leaching Thiosulfate Additives Leaching kinetics Thiosulfate stability

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Thiosulfate Leaching Process For Gold Extraction

Thiosulfate Leaching Process For Gold Extraction

Thiosulfate leaching appears to be one of the most promising alternatives to cyanidation Understanding gold thiosulfate leaching system plays a crucial role in order to effectively extract gold in which the kinetics and equilibrium adsorption of thiosulfate polythionates gold thiosulfate and copper onto resin in

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Gold Thiosulfate Leaching Core

Gold Thiosulfate Leaching Core

At best leaching achieved 298 mghcm2 with ammonium thiosulfate and 268 mghcm2 with sodium thiosulfate In batch reactor experiments the best yield was 88 There was a distinct disappearance of gold after each batch reactor experiment

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Thiosulfate Leaching Gold Refining

Thiosulfate Leaching Gold Refining

May 19 2011018332out if Thiosulfate is a viable process for extracting gold I would like to hear the factsfrom someone that has used it in a real mining situationBits and pieces of information are what is dangerous with any process I have edited this to include some information that may help the forum members in the future and one in particular

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A Fundamental Study Of Gold Leaching In A Thiosulfate

A Fundamental Study Of Gold Leaching In A Thiosulfate

Leaching tests using gold powder showed that the gold dissolution in a thiosulfateoxygencopper system in the absence of activated carbon was very slow with only 2 gold dissolved over 24 h In contrast in the presence of activated carbon as an additive the gold leach recovery was dramatically improved to over 95 in the same period

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The Treatment Of Coppergold Ores By Ammonium Thiosulfate

The Treatment Of Coppergold Ores By Ammonium Thiosulfate

The application of ammonium thiosulfate for the treatment of coppergold ores has been investigated Leaching studies were conducted with copper minerals copper minerals with gold addition to solution and coppergold samples of different copper and gold grades The behaviour of thiosulfate tetrathionate and sulfate in solution was studied using ion chromatography The copper sulfide

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Recovery Of Gold From Thiosulfate Solutions And Pulps

Recovery Of Gold From Thiosulfate Solutions And Pulps

recovery of gold from thiosulfate leach liquors and pulps It was found that Strongbase resins are superior at accommodating the gold thiosulfate complex compared to Weakbase resins which means Strongbase resins have a greater capacity to compete with other anions in leach solutions Strongbase resins were therefore

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Leaching Of Gold Doccopper

Leaching Of Gold Doccopper

Leaching gold with thiosulfate however was found to be sensitive to the concentration of copper thiourea and temperature of the solution The relationship between gold dissolution and copper concentration is complex and involves the complexation of copper by thiosulfate At low concentrations copper can have a catalytic influence but at

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Leaching Of Gold From The Waste Mobile Phone Printed

Leaching Of Gold From The Waste Mobile Phone Printed

Jan 02 2012018332observed that the gold recovery increases up to 01M thiosulfate thereafter on further increase in thiosulfate concentration there is a decrease in the leaching of gold This indicates that the higher thiosulfate concentration promotes the formation of unfavourable products such as trithionate tetrathionate and polythionates 10

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Biooxidationthiosulfate Leaching Of Refractory Gold

Biooxidationthiosulfate Leaching Of Refractory Gold

A process of biooxidation followed by thiosulfate leaching of gold from refractory gold concentrate was investigated Mineralogical studies on the concentrate showed that very fine gold grains 10 m were encapsulated in pyrite and arsenopyrite while the amount of monomer gold was only 21The goldbearing sample was identified as a highsulfur finesized wrappedtype refractory gold

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Effect Of Copper In Gold Leachin

Effect Of Copper In Gold Leachin

Gold leaching in thiosulfate solutions and its Effect of silver in thiosulfate leaching of goldsilver alloys in the presence of copper and ammonia relative to pure gold and silver Oraby E Browner Richard Nikraz Hamid 2014 One promising alternative to cyanide for the leaching of gold is thiosulfate due to its low toxicity and

4611

Goldstrike Tcm Leaching Ausenco

Goldstrike Tcm Leaching Ausenco

Successful gold production uses patented thiosulfate processing method Project Goldstrike TCM Leach Project Location Elko Nevada United States Timeframe 2011 2015 Client involved a 620 million investment that included major upgrades to the Goldstrike leaching circuits and new infrastructure

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Notice Of Retraction Thiosulfate Leaching Of Gold And

Notice Of Retraction Thiosulfate Leaching Of Gold And

Notice of Retraction Thiosulfate Leaching of Gold and Silver from Waste Mobile Phones Abstract This article has been retracted by the publisher Note Notice of Retraction After careful and considered review of the content of this paper by a duly constituted expert committee this paper has been found to be in violation of IEEEs Publication

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The Extraction Of Gold From Ewaste By Hydrometallurgy

The Extraction Of Gold From Ewaste By Hydrometallurgy

In other words less than 2 of the gold remained in the gold leach solution Then the organic phase which is charged with 2 M ammonium hydroxide solution and 05 M sodium thiosulfate was transferred The results were not positive and 313 and 1526 of gold was transferred from organic to

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Gold Leaching In Thiosulfate Solutions And Its

Gold Leaching In Thiosulfate Solutions And Its

Gold and silver leaching in thiosulfate solution is preferable kinetically and environmentally if conducted in a closed vessel systemThe effect silver alloyed with gold was evaluated and the result showed that the dissolution rate of pure gold is higher than that form 4 and 8 wt Ag alloys

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A Method For Leaching Or Dissolving Gold From Ores Or

A Method For Leaching Or Dissolving Gold From Ores Or

lurgical gold extraction routes utilize a leaching step to produce a goldbearing solution as an intermediate product while the recycling of secondary gold from electronic and precious metal scrap is based on the selective and fast dissolution of the precious metal Therefore A Method for Leaching or Dissolving Gold from Ores or Precious

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Factors Affecting Gold Leaching In Thiosulfateo

Factors Affecting Gold Leaching In Thiosulfateo

The research into leaching of gold with thiosulfate as an alternative lixiviant to cyanide has predominantly involved the use of copper in the presence of ammonia which serves as the oxidant However there are concerns about the health and environmental risks of ammonia or ammonium At CSIRO continued research has been carried out to look for different oxidants for the thiosulfate leaching

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Fundamental Aspects Of Gold Leaching In Thiosulfate

Fundamental Aspects Of Gold Leaching In Thiosulfate

The kinetics and mechanism of gold leaching in the ammoniathiosulfatecopper ATSCu system have been studied using the rotating electrochemical quartz crystal microbalance REQCM Anodic polarization cathodic polarization and leaching experiments were included in this study The effect of concentration of different reagents applied potential pH temperature and electrode rotating

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Gold Leaching By Organic Base Polythionates New Nontoxic

Gold Leaching By Organic Base Polythionates New Nontoxic

Thiosulfate leaching of gold represents a potentially attractive alternative to a respective cyanation process at least for three types of auriferous ores Firstly in auriferous ores containing an organic carbon material the recovery of gold by thiosulfate leaching is generally significantly higher due to the insensibility of the thiosulfate

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A Kinetic Study That Compares The Leaching Of Gold In

A Kinetic Study That Compares The Leaching Of Gold In

Jan 26 2001018332gold leaching in cyanide ammoniathiosulfate and chloridehypochlorite solutions The gold leach rates were measured using a rotating electrochemical quartz crystal microbalance REQCM This instrument allows the mass of a gold sample to be measured in situ with a

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