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sodium thiosulfate use for gold leaching

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. However there are also

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Thiosulfate leaching of gold—A review ScienceDirect

Thiosulfate leaching can be considered a non-toxic 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 carbonaceous-type ores. In addition, thiosulfate can be cheaper than cyanide.

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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.

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Sodium Thiosulfate Gold Leaching

sodium thiosulfate use for gold leaching. ALTA Gold 2012 Proceedings ALTA Metallurgical Services. Thiosulphate Leaching Mining SGS. Patent US20040237721 Anoxic leaching of precious metals. leaching gold with thiosulfate phmb info. The Study and Application of Hydrometallurgical Gold

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(PDF) 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

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thiosulfate leach of gold plate YouTube

Feb 24, 2014· 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 remov...

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THIOSULPHATE LEACHING AN ALTERNATIVE TO

equivalent rates of gold leaching, and a typical thiosulphate leach solution will have a reagent concentration of 5 to 20 g/L versus a cyanide concentration of only 0.25 to 1 g/L. The higher concentration of thiosulphate required leads to higher reagent consumption, which is at least .

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how to prepare sodium gold thiosulphate ? Gold Refining

Jul 27, 2012· Sodium thiosulfate will leach gold (dissolve gold), in the use of sodium thiosulfate to leach ore they use air or oxygen, many times ammonia is added, many time’s copper is used as a catalyst for the reaction, keeping the pH regulated is also important for the leach to work. I have never used this leach, and from what I have read about it

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thiosulfate leaching Gold Refining Forum

May 19, 2011· I have some questions about thiosulfate leaching. Has anyone here actually used thiosulfate for leaching gold ore,and had positive results,that can be repeatable as a real leaching process? Has anyone found a real working precipitation process to recover the gold,that works well,and is dependable? Also getting the gold out of the precipitates

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US8597399B2 Method for thiosulfate leaching of precious

Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polythionates, inert atmospheres to control polythionate production, and electrolytic solutions which provide relatively high rates of

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(PDF) 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

More

Sodium Thiosulfate Gold Leaching

sodium thiosulfate use for gold leaching. ALTA Gold 2012 Proceedings ALTA Metallurgical Services. Thiosulphate Leaching Mining SGS. Patent US20040237721 Anoxic leaching of precious metals. leaching gold with thiosulfate phmb info. The Study and Application of Hydrometallurgical Gold

More

US8597399B2 Method for thiosulfate leaching of precious

Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper

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how to leach gold with sodium thiosulfate? Yahoo Answers

Sep 04, 2011· I have a few pieces of computer parts that I would like to extract the gold from. I heard that you can leach it out with sodium thiosulfate which makes a strong complex of gold ions to make [Au(S2O3)2]3−. Is there a way you can get it out of this form? P.S. I know there is a way because it is used in gold leaching

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Gold Sodium Thiosulfate Allergic Contact Dermatitis Database

Also avoid all gold-plated jewelry. Inform your healthcare providerss, including dental providers, that you are allergic to gold sodium thiosulfate. Ask that they use products free from this allergen. Gold

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Method for thiosulfate leaching of precious metal

Li, J. et al.; “Important Solution Chemistry Factors That Influence the Copper-Catalyzed Ammonium Thiosulfate Leaching of Gold,” Presented at the 125th SME Annual Meeting held in Phoenix, Arizona, Mar. 11-14, 1996, pp. 1-20. Li, J. et al.; “Copper Catalyzed Ammoniacal Thiosulfate Leaching of Gold

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