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thiosulfate gold extraction

THIOSULFATE LEACHING OF GOLD A REVIEW . MARK G AYLMORE AND DAVID M MUIR . CSIRO Division of Minerals, PO Box 90 Bentley WA 6982, Australia. Email Mark.Aylmoreminerals.csiro.au Received 26 May 2000 accepted 20 October 2000 ABSTRACT . The ammoniacal thiosulfate leaching process for gold and silver extraction has been reviewed in terms of

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Thiosulfate Leaching of Gold a Review   PDF Document

Thiosulfate Leaching of Gold a Review PDF Document

THIOSULFATE LEACHING OF GOLD A REVIEW . MARK G AYLMORE AND DAVID M MUIR . CSIRO Division of Minerals, PO Box 90 Bentley WA 6982, Australia. Email Mark.Aylmoreminerals.csiro.au Received 26 May 2000 accepted 20 October 2000 ABSTRACT . The ammoniacal thiosulfate leaching process for gold and silver extraction has been reviewed in terms of

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Thiosulfate leaching of goldA review   Semantic

Thiosulfate leaching of goldA review Semantic

2020520Abstract 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. The thiosulfate leaching process it catalysed by copper and has several advantages over the conventional ...

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Thiosulfate Consumption in Gold Ammonia thiosulfate

Thiosulfate Consumption in Gold Ammonia thiosulfate

The regularity of thiosulfate consumption in gold leaching process is studied in simulative and actual situation, respectively. The thiosulfate consumption is increased with the increase of concentration of Cu 2 and ammonium. The S2O3 2 is not consumed, on ...

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Sodium Thiosulfate

Sodium Thiosulfate

2017123Sodium thiosulfate is a component of an alternative lixiviant to cyanide for extraction of gold. However, it forms a strong soluble complex with goldI ions, AuS2O323. The advantage of this approach is that thiosulfate is essentially not toxic and that ore types that are refractory to gold cyanidation e.g. carbonaceous or Carlintype ...

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Thiosulphate Leaching   Mining   SGS

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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gold extraction from boards   rajexpress co za

gold extraction from boards rajexpress co za

Ammonium thiosulfate extraction of gold from printed . In this study, the ammonium thiosulfate leaching of gold Au from printed circuit boards PCBs of endoflife mobile phones and the subsequent recovery of dissolved metals from pregnant leach solution via cementation were elucidated under various conditions.

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Cyanide free gold recovery   CSIRO

Cyanide free gold recovery CSIRO

The results. Developed and brought to market with industry partners. On the path to commercialisation, we partnered with small gold producer, Eco Minerals Research, to build a mobile gold processing demonstration plant based in Menzies, Western Australia.The demonstration plant enabled us to trial and improve the process to ensure it was robust and practical at scale for commercial operations.

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Gold strike with thiosulphate   CSIRO

Gold strike with thiosulphate CSIRO

Gold produced with a cyanidefree thiosulphate process is adding value to a US gold operation. Roger Nicoll reports that the process incorporates patented technology developed through a collaboration between Barrick Gold Corporation and CSIRO.

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thiosulfate leaching   Gold Refining Forum com

thiosulfate leaching Gold Refining Forum com

2011519out 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.

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Thiosulfate Consumption in Gold Ammonia thiosulfate

Thiosulfate Consumption in Gold Ammonia thiosulfate

The regularity of thiosulfate consumption in gold leaching process is studied in simulative and actual situation, respectively. The thiosulfate consumption is increased with the increase of concentration of Cu 2 and ammonium. The S2O3 2 is not consumed, on ...

Get Price

Sodium Thiosulfate

Sodium Thiosulfate

2017123Sodium thiosulfate is a component of an alternative lixiviant to cyanide for extraction of gold. However, it forms a strong soluble complex with goldI ions, AuS2O323. The advantage of this approach is that thiosulfate is essentially not toxic and that ore types that are refractory to gold cyanidation e.g. carbonaceous or Carlintype ...

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Separation of Gold from Other Metals in Thiosulfate

Separation of Gold from Other Metals in Thiosulfate

2018611The extraction of gold, silver, copper, zinc, and nickel present in thiosulfate solutions with or without the presence of ammonia was studied. Results show that neither a primary amine nor the mixed extractants of a primary amine with tributyl phosphate or trialkyl amine oxide can separate gold from other metals in the absence of ammonia in aqueous solutions.

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thiosulfate gold leaching   micheldeegens nl

thiosulfate gold leaching micheldeegens nl

Thiosulfate Gold Extraction Leach These solutions have very little solving action upon the natural sulphide contained in goldbearing ore, and should be suitable solutions for the treatment of gold or silver ore, as they have a greater solving power than cyanide of potash, are not poisonous, and can be obtained in very large quantities at a ...

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Preparation of Sodium Thiosulfate and Sodium Polysulfide

Preparation of Sodium Thiosulfate and Sodium Polysulfide

The preparation of sodium thiosulfate and sodium polysulfide mixture for gold leaching,with the reagent of sulphur and sodium hydroxide,was studied by the experiments.The results show that the optimum reaction conditions are as follows mixing speed 200 rmin ...

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The role of ligands and oxidants in thiosulfate

The role of ligands and oxidants in thiosulfate

The widely used cyanidation technology is not applicable to some gold ores due to economic or technical reasons when the cyanidation gives very low gold extractions. Despite the fact that the gold mining industry accounts for only 13 of total cyanide consumption there is growing public concern over the use of toxic cyanide for gold extraction. Many researchers have identified that thiosulfate ...

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Leaching of gold from a free milling gold ore in copper

Leaching of gold from a free milling gold ore in copper

2020526Similar gold extraction is obtained for Coppercitratethiosulfate system and cyanidation. Leaching of gold ore is controlled by the product layer diffusion. For the last two decades, a considerable amount of research has focused on developing a completely safe and nontoxic leaching process for gold to replace cyanidation.

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gold extraction from boards   rajexpress co za

gold extraction from boards rajexpress co za

Ammonium thiosulfate extraction of gold from printed . In this study, the ammonium thiosulfate leaching of gold Au from printed circuit boards PCBs of endoflife mobile phones and the subsequent recovery of dissolved metals from pregnant leach solution via cementation were elucidated under various conditions.

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Gold recovery from refractory gold concentrates by

Gold recovery from refractory gold concentrates by

201931conditions, the Au extraction value was about 86.21, which was significantly higher than that obtained with leaching directly. Keywords gold, pressure oxidation, thiosulfate, leaching, RSM 1. Introduction Gold was an important rare and precious metal, always coexists with

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gold extraction from boards   rajexpress co za

gold extraction from boards rajexpress co za

Ammonium thiosulfate extraction of gold from printed . In this study, the ammonium thiosulfate leaching of gold Au from printed circuit boards PCBs of endoflife mobile phones and the subsequent recovery of dissolved metals from pregnant leach solution via cementation were elucidated under various conditions.

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ammonium thiosulfate mining gold leaching

ammonium thiosulfate mining gold leaching

extraction and thiosulfate consumption. The maximum gold extraction obtained was compatible with that obtained with cyanide leaching, indicating the possibility of use of thiosulfate. Lowering copper grade prior to thiosulfate leaching through sulphuric acid leaching bad a negative effect on gold extraction, while injecting N2 in order to ...

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thiosulfate gold leaching   micheldeegens nl

thiosulfate gold leaching micheldeegens nl

Thiosulfate Gold Extraction Leach These solutions have very little solving action upon the natural sulphide contained in goldbearing ore, and should be suitable solutions for the treatment of gold or silver ore, as they have a greater solving power than cyanide of potash, are not poisonous, and can be obtained in very large quantities at a ...

Get Price

Gold recovery from refractory gold concentrates by

Gold recovery from refractory gold concentrates by

201931conditions, the Au extraction value was about 86.21, which was significantly higher than that obtained with leaching directly. Keywords gold, pressure oxidation, thiosulfate, leaching, RSM 1. Introduction Gold was an important rare and precious metal, always coexists with

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LEACHING GOLD BY LOW CONCENTRATION

LEACHING GOLD BY LOW CONCENTRATION

Abstract The effects of the concentrations of thiosulfate,copper and ammonia on the extraction of gold from sulfide gold concentrate have been studied. The results show that it is possible to reduce thiosulfate concentration. More than 95 of the gold could be ...

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Leaching of Gold from the Waste Mobile Phone

Leaching of Gold from the Waste Mobile Phone

2017121The rapid growth in the use of electronic equipments, combined with early obsolescence has contributed enormously to the generation of large quantity of electronic e waste. One such ewaste, the mobile phone printed circuit boards PCBs contain various precious metals which can be extracted by different hydrometallurgical routes. The present work deals with the recovery of gold using ...

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Ph D theses about gold leaching  CSDN

Ph D theses about gold leaching CSDN

20131024thiosulfate 1.4 The use of gold colloids for kinetic studies 1.5 Objectives 2. 1 History and recent progress on gold extraction using thiosulfate 15 2.2 Goldcoppersulfur species and electrode potentials 17 2.2.1 Goldcopper species 17 2.2.2 Sulfur species 23 2 ...

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THIOSULFATE LEACHING OF SILVER FROM A SOLID

THIOSULFATE LEACHING OF SILVER FROM A SOLID

2015522Thiosulfate leaching of silver from a solid residue after pressure leaching of industrial copper 605 Results and discussion The effect of thiosulfate ions concentration on Ag and Cu leaching was investigated for four different thiosulfate concentrations 0.25, 0.50, 0.75 and 1.00 moldm3. The

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hxhg hpu edu cn

hxhg hpu edu cn

2019781. Wang Q, Hu X, Zi F, Yang P, Chen Y, Chen S. Environmentally friendly extraction of gold from refractory concentrate using a copper ethylenediamine thiosulfate solutionJ. Journal of Cleaner Production, 2019, 214 860872. SCI 2.

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