Of Thiosulfate In Gold Leaching

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  • 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.

  • THIOSULPHATE LEACHING AN ALTERNATIVE TO CYANIDATION

    THIOSULPHATE LEACHING AN ALTERNATIVE TO CYANIDATION IN GOLD PROCESSING ALTERNATIVES TO CYANIDE IN GOLD PROCESSING THIOSULPHATE LEACHING 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

  • Thiosulfate leaching of gold A review Request PDF

    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.

  • 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.

  • Cited by: 460
  • 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.

  • Cited by: 460
  • COMPARISON OF CYANIDE AND THIOSULPHATE LEACHING FOR

    cons which have been discussed in this work. The topics of this work are gold ores and their suitability for leaching processes, pretreatment of concentrate, leaching chemistry and reagent consumption, leaching kinetics, gold recovery from leaching liquors and environmental and safety aspects.

  • Thiosulphate Leaching Mining SGS

    Thiosulfate leaching is particularly well suited to state-of-the-art resin-in-pulp (RIP) gold recovery technologies Thiosulfate leaching is an alkaline process (usually operated in the pH 8 to 10 range) so there are no concerns with corrosion of equipment in the recovery operation; The main chemical components of the thiosulfate leaching

  • Effect of additives on thiosulfate leaching of a gold ore

    Effect of additives on thiosulfate leaching of a gold ore *S.J. Dai, P.C. Li, Q.Q. Wang,D.W. Feng University of Science and Technology, Liaoning, Anshan, China Received August 15, 2017, Revised November 15, 2017 The effect of additives on gold leaching was investigated using ammonium thiosulfate or calcium thiosulfate.

  • 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 copper-bearing gold ore, the authors used a reagent combination of 0.3M (NH 4) 2 S 2 O 3, 0.03M CuSO 4 and 3M NH 3 at pH 10.2 for 24 hours. In the testing

  • Degradation of Thiosulfate in the Process of Gold Leaching

    Thiosulfate is a promising alternative for the hydrometallurgical treatment of gold ores. Degradation of thiosulfate before leaching and in the process of gold as well as the behaviours of

  • How to leach gold with sodium thiosulfate Quora

    27/05/2017· Crush your ore to the consistency of fine sand in a rod mill, then transfer it into a large vat with a strong solution of sodium thiosulfate and agitate it with paddles for a day to a week, depending on the size of your vat. Finally, filter and di...

  • US6632264B2 Gold recovery from thiosulfate leaching

    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 thiosulfate solution prior to contacting with an

  • thiosulfate leach of gold plate YouTube

    24/02/2014· 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 remove gold from gold plated objects and

  • Author: Geo
  • Barrick Thiosulfate Leaching of Double Refractory Ore

    The leaching of gold is then accomplished by maintaining a temperature of 50-70⁰C.7 The 2009 Patent15 mentions that the thiosulfate concentration in the leaching container may have to be subsidized with more thiosulfate as the test goes along “to prevent the re- precipitation of gold as its sulfide.” The overall thiosulfate 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, copper-ammon ions, pH and sulphite on anodic oxidation of thiosulfate ions have been examined in details. Results show that the anodic oxidation of thiosulfate

  • THIOSULPHATE LEACHING FOR GOLD PRODUCTION JACOB

    7/06/2018· Thiosulfate leaching is a process that recovers gold from ore without the use of cyanide. Jacob Jason Demedici developed the thiosulfate leaching process because in

  • THIOSULPHATE LEACHING FOR GOLD PRODUCTION JACOB

    7/06/2018· Thiosulfate leaching is a process that recovers gold from ore without the use of cyanide. Jacob Jason Demedici developed the thiosulfate leaching process because in

  • Going for gold: Alternative processing methods

    17/01/2014· Thiosulfate was chosen for in-situ or in-place leaching of gold as it is more environmentally friendly than cyanide, however its stability and rate of gold

  • 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 system.The 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% silver alloys is more than that obtained for pure gold

  • Fundamental aspects of gold leaching in thiosulfate

    Fundamental aspects of gold leaching in thiosulfate solutions: Creator: Li, Cheng: Date Issued: 2003: Description: The kinetics and mechanism of gold leaching in the ammonia-thiosulfate-copper (ATS-Cu) system have been studied using the rotating electrochemical quartz crystal microbalance (REQCM). Anodic polarization, cathodic polarization and

  • Kinetic Investigation and Dissolution Behavior of Cyanide

    10/05/2019· Thiosulfate is the most promising non-cyanide leaching reagent and the only reagent which found industrial application on gold recovery from a highly carbonaceous preg-robbing gold

  • thiosulfate leaching Gold Refining Forum

    19/05/2011· 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 seems to be a real pain. Any real answers for this

  • Gold adsorption and elution in thiosulfate leaching system

    The gold loaded MNPs were easily separated from the solution using an external magnetic field. Proposing a novel adsorbent with characteristically easy solid-liquid separation, to recover gold from synthetic thiosulfate leaching solutions and gold elution and reuse of MNPs were the main objectives of this study. Adsorption isotherm studies

  • process for thiourea and thiosulphate leaching Gold

    9/11/2015· butcher wrote:I suspect iron with thiosulfate would form ferrous sulfate and precipitate the gold, while your trying to leach, basically not leaching the gold into solution (at least to any extent). qst42know is this your thought?

  • DISSOLUTION OF GOLD WITH CYANIDE REPLACING REAGENTS

    queries. The aim of this paper is to study leaching of gold with cyanide replacing alternatives such as ammonium thiosulfate, chloride-hypochlorite, thiourea and thiocyanate to provide new cases for the tool. The behaviour of gold was examined with electrochemical tests and weight loss measurements a using

  • Published in: Physicochemical Problems of Mineral Processing · 2015Authors: Jari Aromaa · Lotta Rintala · Mikko Kahari · Olof ForsenAffiliation: Helsinki University of TechnologyAbout: Thiocyanate · Ammonium thiosulfate · Chloride · Thiourea
  • Leaching of Gold from the Waste Mobile Phone Printed

    lixiviant for gold leaching which efficiently recovers gold. 3. but this is not an economical route for the gold leaching due to its high consumption and cost. Thiosulfate leaching to recover gold from ores is known for several decades but extensive researches have been started only for the past two decades. 4