leaching gold with thiosulfate

Thiosulfate leaching of gold—A review ScienceDirect Thiosulfate leaching can be considered a nontoxic process, the gold dissolution rates can be faster than co leaching gold with thiosulfate

leaching gold with thiosulfate

Thiosulfate leaching of gold—A review ScienceDirect

Thiosulfate leaching can be considered a nontoxic process, the gold dissolution rates can be faster than conventional cyanidation and, due to the decreased interference of foreign cations, high gold recoveries can be obtained from the thiosulfate leaching of complex and carbonaceoustype ores In addition, thiosulfate can be cheaper than cyanideThiosulfate leaching can be considered a nontoxic process, the gold dissolution rates can be faster than conventional cyanidation and, due to the decreased interference of foreign cations, highThiosulfate leaching of gold A review | Request PDFThe gold industry has been seeking alternative reagents for leaching gold from lowgrade ores for the past 25 years The cost and transport of cyanide, the poor recovery of gold from carbonaceous ores, the lack of selectivity of cyanide towards copper minerals and the cost of waste treatment are real factors which can make cyanide unattractive in some circumstancesSodium Thiosulphate Gold Leaching

Biooxidation‒thiosulfate 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 μm) were encapsulated in pyrite and arsenopyrite, while the proportion of monomer gold was only 21% The goldbearing sample was identified as a highsulfur finesized wrappedtype refractory goldUnderstanding 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 resinsolution systems are taken into account Process models associated with theThiosulfate Leaching Process for Gold ExtractionAmmonium 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 temperatureThiosulphate Stability In Gold Leaching Process

THIOSULPHATE LEACHING – AN ALTERNATIVE TO

Thiosulphate leaching is a process that removes gold from gold bearing ores without the use of cyanide Although not as aggressive a leaching agent as cyanide, thiosulphate offers several technological advantages including its lower toxicity and greater efficiency with gold depositsof leaching gold with ammoniacal thiosulphate has been proposed Ammonia reacts primarily with gold ions on th2anodic surface of gold and the formed ~iNH3)/ reaezs then with S20 3insolution to fonn the stabler Au(S203) 2' Cu (NE?) : gains electrons on the cathodic surface and is reduced to CU(N~)2' which is then oxidised by oxygen andElectrochemistry and Mechanism of Leaching Gold withThiosulfate leaching is considered to be a promising method for carbonaceous gold ore treatment because of low affinity of gold thiosulfate complex to activated carbon (Gallagher et al, 1990, Aylmore et al, 2014) Many reports on the use of thiosulfate solutions to extract gold from carbonaceous ores have been publishedResearch on leaching of carbonaceous gold ore with

Gold strike with thiosulphate

The first gold bar produced with the thiosulphate process was poured in late 2014 at Barrick’s Goldstrike plant in Nevada, USA and operations are ramping up to recover goldThiosulfate leaching can be considered a nontoxic process, the gold dissolution rates can be faster than conventional cyanidation and, due to the decreased interference of foreign cations, high gold recoveries can be obtained from the thiosulfate leaching of complex and carbonaceoustype ores In addition, thiosulfate can be cheaper than cyanideThiosulfate leaching of gold—A review ScienceDirectA 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 μm) were encapsulated in pyrite and arsenopyrite, while the proportion of monomer gold was only 21% The goldbearing sample was identified as a highsulfur finesized wrappedtype refractory goldBiooxidation‒thiosulfate leaching of refractory gold

Thiosulfate Leaching Process for Gold Extraction

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 resinsolution systems are taken into account Process models associated with theof leaching gold with ammoniacal thiosulphate has been proposed Ammonia reacts primarily with gold ions on th2anodic surface of gold and the formed ~iNH3)/ reaezs then with S20 3insolution to fonn the stabler Au(S203) 2' Cu (NE?) : gains electrons on the cathodic surface and is reduced to CU(N~)2' which is then oxidised by oxygen andElectrochemistry and Mechanism of Leaching Gold withThe gold industry has been seeking alternative reagents for leaching gold from lowgrade ores for the past 25 years The cost and transport of cyanide, the poor recovery of gold from carbonaceous ores, the lack of selectivity of cyanide towards copper minerals and the cost of waste treatment are real factors which can make cyanide unattractive in some circumstancesSodium Thiosulphate Gold Leaching

Improved thiosulfate leaching of a refractory gold

The roles of these additives in thiosulfate leaching of gold are widely believed to be that they can compete with thiosulfate anions to complex with cupric ions at axial coordinate sites and thus reduce the interaction between cupric ions and thiosulfate (Breuer and Jeffrey, 2003b, Feng and van Deventer, 2011, Senanayake, 2012)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 temperatureThiosulphate Stability In Gold Leaching ProcessThiosulfate leaching is considered to be a promising method for carbonaceous gold ore treatment because of low affinity of gold thiosulfate complex to activated carbon (Gallagher et al, 1990, Aylmore et al, 2014) Many reports on the use of thiosulfate solutions to extract gold from carbonaceous ores have been publishedResearch on leaching of carbonaceous gold ore with

The effect of solution parameters on the thiosulfate

In the thiosulfate leaching of gold, one of the main reagents is copper (II) The major role of the cupric ion in the thiosulfate leaching system is to catalyze the dissolution of gold (Breuer and Jeffrey, 2000) Copper, as an oxidant, can also enhance the degradation of thiosulfate and increase its consumption in the processThiosulphate leaching is a process that removes gold from gold bearing ores without the use of cyanide Although not as aggressive a leaching agent as cyanide, thiosulphate offers several technological advantages including its lower toxicity and greater efficiency with gold depositsTHIOSULPHATE LEACHING – AN ALTERNATIVE TOHemmati et al (1989) investigated the thiosulfate leaching of gold from carbonaceous ore that contained 25% organic carbon The optimum conditions for gold extraction were found to be 35°C and 103 kPa oxygen over pressure, pH 105, 3M NH3 with a lixiviant(PDF) Thiosulfate leaching of gold—A review | Mark

A Review of Thiosulfate Leaching of Gold: Focus on

Thiosulfate leaching is a promising alternative to cyanidation, and the main hindrances for its wide commercial application are the high thiosulfate consumption and the difficult recovery of dissolved gold In this review, the four solutions to reduce the consumption of thiosulfate, including the control of reaction conditions, the use of additives, the generation of thiosulfate in situ, andGold 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 And the dissolution rate of gold from 20 and 50%Gold leaching in thiosulfate solutions and itsThiosulfate leaching can be considered a nontoxic process, the gold dissolution rates can be faster than conventional cyanidation and, due to the decreased interference of foreign cations, high gold recoveries can be obtained from the thiosulfate leaching ofThiosulfate leaching of gold A review 百度学术

Factors affecting gold leaching in thiosulfateO2 solutions

ALTA 2013 Gold Conference, Perth, WA, Australia, 25 May 1 June 2013 Pages: 9p Abstract: 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 oxidantAmmoniacal thiosulfate has been studied over the last three decades as a nontoxic and highlyefficient alternative lixiviant to cyanide for leaching gold from gold ores with copper(II) acting as a catalyst [1,2]Much of the work has concentrated on coppergold ores, carbonaceous gold ores and complex sulfidic gold ores where the recovery of gold by cyanidation is unsatisfactory or theEffect of Pyrite on Thiosulfate Leaching of Gold and the36 CHEMISTRY OF GOLD LEACHING WITH THIOSULFATE 100 361 The Rate of Conversion of Copper (II) to Copper (I) 100 362 Stability of Copper (II) Amine in a Thiosulfate Solution 100 37 ADSORPTION EXPERIMENTS 102 371 Gold Loading on Various Commercial Resins 102 372 Loading of Sulfur Anions 102Recovery of Gold from Thiosulfate Solutions and Pulps

thiosulfate leaching Gold Refining Forum

out if Thiosulfate is a viable process for extracting gold I would like to hear the facts,from 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 particularLiu X L, Xu B, Yang Y B, et al Effect of galena on thiosulfate leaching of gold Hydrometallurgy, 2017, 171: 157 doi: 101016/jhydromet201705011 [14] Yang Y B, Gao W, Xu B, et al Study on oxygen pressure thiosulfate leaching of gold without the catalysis金矿非氰化浸金研究进展Leaching of gold and silver from printed circuit board Leaching of gold and silver from printed circuit board of mobile phones Inquire Now; Leaching of Gold DocCopper Copper, Gold and Leaching of Gold with Various Gold will dissolve in the presence of ammonium thiosulfate as Here is a more scientific explanation of thiosulfateammonium thiosulfate leaching gold jcc2019cl