thiosulfate gold extraction


Thiosulphate Leaching | Mining | SGS

Thiosulfate leaching offers a number of benefits related to gold recovery yields and environmental concerns: Thiosulfate leaching of gold ores has great potential to reduce the impact on the environment. Unlike cyanide, which is highly toxic, the chemicals used in the thiosulfate leaching process are benign.

THIOSULPHATE LEACHING AN ALTERNATIVE TO CYANIDATION IN GOLD

and greater efficiency with gold deposits associated with preg-robbing ores. The thiosulphate leaching process, followed by resin-in-pulp gold extraction, has been developed by SGS to the point where it is a technically and economically viable alternative to cyanidation for some gold bearing ore bodies. Whether the leaching is performed in

CN101760628B

The invention provides a thiosulfate gold extracting method taking diethylenetriamine as an additive, which is characgerized by comprising the following steps of: adding 0.03-3 mol/dm<3> of thiosulfate leaching agents to ore pulp which is subjected to wet grinding and has the mass concentration of 40 percent by water volume; then adding a diethylenetriamine and copper (II) coordination ion

thiosulfate leaching

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 situation.Bits 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.

thiosulfate leach of gold plate

recovered powders from a sodium thiosulfate leach of gold plated pins. if all my experiments can be perfected, i will have a safe, non-toxic process to remove gold from gold plated objects and

thiosulfate leaching

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 situation.Bits 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.

Thiosulfate leaching of gold

The ammoniacal thiosulfate leaching process for gold and silver extraction has been reviewed in terms of leaching mechanism, thermodynamics, thiosulfate stability, and gold recovery options.

Associated Sulfide Minerals in Thiosulfate Leaching of Gold

Associated Sulfide Minerals in Thiosulfate Leaching of The effects of some associated minerals on thiosulfate gold leaching were PYRITE ON GOLD EXTRACTION AND

Leaching of gold and silver from printed circuit board of

The effect of adding an oxidizing agent (H 2 O 2) for gold extraction in solutions of sodium thiosulfate and ammonium thiosulfate are shown in Figure 3. It was observed that the addition of the oxidizing agent increases the gold extraction, reaching a percentage similar to that of the cupric ion addition.

Thiosulfate leaching process for gold extraction

Gold leaching in thiosulfate solutions and its environmental effects compared with cyanide Oraby, Elsayed A. ( 2009 ) Nowadays, keeping mining and the environment sustainable is a major concern all over the world.

Sodium thiosulfate

Sodium thiosulfate is used in gold mining, water treatment, analytic chemistry, the development of silver-based photographic film and prints, and medicine. The medical uses of sodium thiosulfate include treatment of cyanide poisoning and pityriasis. It is on the World Health Organization's List of Essential Medicines.

Gold and silver extraction by ammoniacal thiosulfate leaching

title = "Gold and silver extraction by ammoniacal thiosulfate leaching from a rhyolite ore", abstract = "An investigation has been carried out to identify the parameters of importance in the dissolution of gold and silver values from an ore using ammoniacal thiosulfate solutions containing copper.

Gold strike with thiosulphate MINING.COM

The first gold bar produced with the thiosulphate process was poured in late 2014 at Barricks Goldstrike plant in Nevada, USA and operations are ramping up to recover gold from four million

Thiosulfate leaching of goldA review

Chen et al. (1996) reported at 50, 90% gold extraction from a sulfide concentrate without the addition of an oxidant. However, a relatively high polysulfide concentration (>2M) is required for high gold extraction. In mixtures of thiosulfate and polysuifides, the polysulfides only act as a lixivant when no oxidant is present.

thiosulfate leach of gold plate

recovered powders from a sodium thiosulfate leach of gold plated pins. if all my experiments can be perfected, i will have a safe, non-toxic process to remove gold from gold plated objects and

The Chemistry of the Extraction of Gold

The Chemistry of the Extraction of Gold M.J. Nicol, C.A. Fleming and R.L. Paul 1S.1 General Principles 15.1.1 The chemistry of gold compounds Gold is the most noble of all the metals and this .is the key to both its eternal romance and its many practical uses in industry. It is the only metal, for

Gold strike with thiosulphate MINING.COM

The first gold bar produced with the thiosulphate process was poured in late 2014 at Barricks Goldstrike plant in Nevada, USA and operations are ramping up to recover gold from four million

US6632264B2

Processes for recovering gold from copper-gold ores thiosulfate leaching or gold ores copper catalyzed thiosulfate leaching using ion exchange technology are disclosed. The processes include subjecting the gold-bearing and copper-bearing thiosulfate solution to a pH and/or temperature adjustment to reduce tetrathionate concentration in the

Sodium Thiosulphate Gold Leaching

The gold industry has been seeking alternative reagents for leaching gold from low-grade 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 circumstances.

Associated Sulfide Minerals in Thiosulfate Leaching of Gold

Associated Sulfide Minerals in Thiosulfate Leaching of The effects of some associated minerals on thiosulfate gold leaching were PYRITE ON GOLD EXTRACTION AND

Leaching of gold and silver from printed circuit board of

The effect of adding an oxidizing agent (H 2 O 2) for gold extraction in solutions of sodium thiosulfate and ammonium thiosulfate are shown in Figure 3. It was observed that the addition of the oxidizing agent increases the gold extraction, reaching a percentage similar to that of the cupric ion addition.

thiosulfate gold extraction

The role of ligands and oxidants in thiosulfate leaching of gold. Since the late 1970's (1), the oxidation of gold by thiosulfate. (S2O3. 2-) solutions has . gold and silver extraction during thiosulfate leaching and conventional

Sodium Thiosulfate

Sodium thiosulfate is a component of an alternative lixiviant to cyanide for extraction of gold. However, it forms a strong soluble complex with gold(I) ions, [Au(S2O3)2]3.

Sodium Thiosulfate: Formula, Properties, Risks and Uses

Sodium thiosulfate is a component used as an alternative leaching agent to cyanide for the extraction of gold. However, it forms a strong soluble complex with the ions gold (I), [Au (S 2 OR 3 ) 2 ] 3- .

Leach Gold using Hyposulphite Of Sodium AKA Thiosulfate Gold

Thiosulfate Gold Extraction The fact that gold will dissolve in sodium hyposulphite solutions is known from the lixiviation of silver and gold ores. The gold will dissolve only in small quantities.

Thiosulfate leaching of goldA review

The ammoniacal thiosulfate leaching process for gold and silver extraction has been reviewed in terms of leaching mechanism, thermodynamics, thiosulfate stability, and gold recovery options. The application to different ore types and process options have also been discussed.

Improvement of thiosulfate stability in gold leaching

Ammonium thiosulfate is a noncyanide lixiviant for gold leaching. However, the major problem with this leaching method has been the high consumption of reagents. To leach a mild-refractory

Sodium Thiosulfate Formula

It is an important antidote used for treating cyanide poisoning. Apart from its medical uses, it also has applications in water treatment, neutralizing bleach, leather tanning, gold extraction, photographic processing, and chemical heating pads. Health effects/safety hazards: Sodium thiosulfate is not a toxic material and is used for medical

The role of ligands and oxidants in thiosulfate leaching of gold

also affect gold extraction (21,30). Figure 5 compares and contrasts the effect of silver grade of the starting material on % gold and silver extraction during thiosulfate leaching and conventional cyanidation of oxide ores (21). In the case of gold ores of low silver grade (0.3 Ag g/t), thiosulfate leaching

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.

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