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ammonium thiosulfate gold recovery

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ammonium thiosulfate gold recovery
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Ammonium thiosulfate extraction of gold from 202011ensp;0183;ensp;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.Gold Recovery from Nickel Catalyzed Ammonium In order to recover gold from t

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  • The role of ligands and oxidants in thiosulfate leaching

    2017828ensp;0183;ensp;gold metal from leach liquor by adding ammonium sulphide (34). Although a low gold recovery of 8283% was achieved in nonammoniacal thiosulfate at elevated temperatures and oxygen partial pressures (19), a recent study has shown the possible application of iron(III)EDTAthiosulfatethiourea as a leaching agent for gold, to achieve a much Recovery of gold ions from ammonium thiosulfate using

    2021312ensp;0183;ensp;Recovery of gold ions from ammonium thiosulfate using synergistic effects of aluminum and activated carbon S. Jeon1, H. Takahashi2, C. B. Tabelin3, M. Ito1, and N. Hiroyoshi1 In hydrometallurgy, ammonium thiosulfate medium is an alternative to cyanide or halides, which

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  • Recovery of gold ions from ammonium thiosulfate

    Recovery of gold ions from ammonium thiosulfate using synergistic effect of aluminum and activated carbon $16.50

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  • Gold Recovery from Nickel Catalyzed Ammonium

    Copper catalyzed ammonium thiosulfate leaching process has been proposed as an alternative gold extraction process to cyanidation. In order to recover gold from the ammonium thiosulfate solution, ion exchange process has been proposed as a gold recovery

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  • GOLD RECOVERY FROM PRINTED CIRCUIT BOARDS

    In the sodium thiosulfate and ammonium thiosulfate tests, it was possible to extract 70 and 75% of the gold contained in the PCB, respectively, using solutions containing 0.12 M of sodium or ammonium thiosulfate, 0.2 M of ammonium and 20 mM of copper sulfate in 4 hours of leaching, at a temperature of 30(2(C and pH 10.

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  • Method for thiosulfate leaching of precious metal

    III. Production of Ammonium Sulfamate by the Oxidation of Ammonium Thiosulfate, Bulletin of the Chemical Society of Japan, vol. 43, pp. 13651372. Dec. 1970. Nicol, M.J. et al.; Recovery of Gold from Thiosulfate Solutions and Pulps with IonExchange Resins; presented at TMS Annual Meeting, New Orleans, LA Feb. 1115, 2001.

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  • Thiosulphate leaching Recovery of gold from

    The main recovery methods of gold from thiosulfate leaching solution are introduced, such as replacement precipitation, carbon adsorption, ionexchange resin adsorption, and solvent extraction.Recovery of gold ions from ammonium thiosulfate using

    2021312ensp;0183;ensp;Recovery of gold ions from ammonium thiosulfate using synergistic effects of aluminum and activated carbon S. Jeon1, H. Takahashi2, C. B. Tabelin3, M. Ito1, and N. Hiroyoshi1 In hydrometallurgy, ammonium thiosulfate medium is an alternative to cyanide or halides, which

    Contact Us
  • Recovery of gold ions from ammonium thiosulfate using

    2021312ensp;0183;ensp;In hydrometallurgy, ammonium thiosulfate medium is an alternative to cyanide or halides, which is toxic and highlycorrosive as it is nontoxic as well as lowcorrosive. Although the solution has those kinds of advantages, its application in real plant is because of difficulties in the recovery of gold ions from the leached solutions.

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  • Biooxidationthiosulfate 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 (lt;10 μm) were encapsulated in pyrite and arsenopyrite, while the proportion of monomer gold was only 21%.

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  • Gold Recovery from Nickel Catalyzed Ammonium

    In order to recover gold from the ammonium thiosulfate solution, ion exchange process has been proposed as a gold recovery method using strongly basic anion exchange resin.

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  • Ammonium thiosulfate extraction of gold from

    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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  • US4269622A Recovery of precious metals from

    Precious metals such as gold and silver are recovered from difficulttotreat ores, particularly those containing manganese, by lixiviating using an ammonium thiosulfate leach solution containing copper, sufficient ammonia to maintain a pH of at least 7.5, and at least 0.05% sulfite ion.

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  • THE INCREASED ACTIVITY IN THE DEVELOPMENT OF

    GOLD THIOSULFATE RECOVERY The concentration and recovery of gold from thiosulfate leach solution by adsorption onto strong base IX resin can be achieved via RIL, RIP or resinincolumn contact and subsequent elution. A generic flowsheet of a RIL or RIP process is shown in Figure 1 with preelution using ammonium thiosulfate (ATS) to remove

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  • The treatment of coppergold ores by ammonium

    2002101ensp;0183;ensp;The average gold recovery for thiosulfate heap leach at a particle size of minus 1.9 cm was found to be approximately 55%. Ammonium thiosulfate consumption was about 5 kg/ton for low sulfide carbonaceous ores (without biooxidation) and 1215 kg/ton for biooxidised ores.

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  • Treatment of a Polysulphide Ore by Ammoniacal

    2015728ensp;0183;ensp;further gold recovery. Gold electrodeposition from ammoniacal thiosulfate solutions, by application of a direct current, presents various hardships. For instance, the presence of cupric ions could contaminate the metallic product obtained by the reduction of goldthiosulfate complex in the cathode area [1]. Another issue is the high consumption

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  • Treatment of a Polysulphide Ore by Ammoniacal

    2015728ensp;0183;ensp;further gold recovery. Gold electrodeposition from ammoniacal thiosulfate solutions, by application of a direct current, presents various hardships. For instance, the presence of cupric ions could contaminate the metallic product obtained by the reduction of goldthiosulfate complex in the cathode area [1]. Another issue is the high consumption

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  • THIOSULFATE LEACHING OF GOLDA REVIEW_

    2013130ensp;0183;ensp;162 M.G. Alymoreand D. M. Muir / Ammonium Thiosulfate Heao Ammonium Thiosulfate Cu 2+ NH3 ~~t Pregnant Lixiviant Solution Storage Pump v Precious Metal Recovery system Fig.14 A schematic diagram of a gold and silver leaching and recovery process for

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  • Effect of additives on thiosulfate leaching of a gold ore

    2018324ensp;0183;ensp;speed of 250 r/min, 100% leach recovery of gold was achieved with 0.03 M fresh ammonium thiosulfate, 2 mM EDTA after 11 h leach. In a resininleach system, full gold recovery was also achievable with sufficient resin after 24 h leach with 0.06 M fresh ammonium thiosulfate and 2 mM EDTA at an agitation speed of 250 r/min.

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  • The treatment of coppergold ores by ammonium

    The application of ammonium thiosulfate for the treatment of coppergold ores has been investigated. Leaching studies were conducted with copper minerals, copper minerals with gold addition to solution and coppergold samples of different copper and gold grades. The behaviour of thiosulfate, tetrathionate and sulfate in solution was studied using ion chromatography. The copper sulfide minerals

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  • Gold Recovery from Nickel Catalyzed Ammonium

    In order to recover gold from the ammonium thiosulfate solution, ion exchange process has been proposed as a gold recovery method using strongly basic anion exchange resin. However, the coadsorption of copper along with gold causes difficulty in separating gold and copper at

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  • Ammonium thiosulfate extraction of gold from

    202011ensp;0183;ensp;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.

    Contact Us
  • THIOSULFATE LEACHING OF GOLDA REVIEW_

    2013130ensp;0183;ensp;162 M.G. Alymoreand D. M. Muir / Ammonium Thiosulfate Heao Ammonium Thiosulfate Cu 2+ NH3 ~~t Pregnant Lixiviant Solution Storage Pump v Precious Metal Recovery system Fig.14 A schematic diagram of a gold and silver leaching and recovery process for

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  • Using Nickel as a Catalyst in Ammonium Thiosulfate

    The feasibility of recycling barren solution was confirmed with zinc precipitation at nearly 100% of gold recovery. Nickel consumption on the cementation process was less than 50%. For extracting gold from the copper bearing sulfide ore, a higher ammonia and thiosulfate concentrations were required with 0.0001 mol/dm 3 of Ni 2+. The ammonium

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  • Thiosulfate leaching of goldA review ScienceDirect

    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.

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  • Gold Cementation from Ammonium Thiosulfate Solution

    2016914ensp;0183;ensp;composition for the gold cementation from the ammonium thiosulfate solution was founded to be 1mol/l NH4OH, 0.01mol/l CuSO4 5H2O and 0.4mol/l (NH 4 ) 2 S 2 O 3 at pH 9.5. 100% of gold was recovered by zinc and aluminium powders at a Metal/Gold mass ratio of 30.

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  • The treatment of coppergold ores by ammonium

    The application of ammonium thiosulfate for the treatment of coppergold ores has been investigated. Leaching studies were conducted with copper minerals, copper minerals with gold addition to solution and coppergold samples of different copper and gold grades. The behaviour of thiosulfate, tetrathionate and sulfate in solution was studied using ion chromatography. The copper sulfide minerals

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  • Recovery of gold ions from ammonium thiosulfate

    Among the alternatives, ammonium thiosulfate is promising reagent because of its nontoxic, lowcorrosiveness as well as highselectivity for gold. Despite those advantages, its application in commercial mining plant is still so far because of its serious drawback, which is that acceptable recovery technique for gold ions from pregnant

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  • Using Nickel as a Catalyst in Ammonium Thiosulfate

    The feasibility of recycling barren solution was confirmed with zinc precipitation at nearly 100% of gold recovery. Nickel consumption on the cementation process was less than 50%. For extracting gold from the copper bearing sulfide ore, a higher ammonia and thiosulfate concentrations were required with 0.0001 mol/dm 3 of Ni 2+. The ammonium

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  • Gold recovery from refractory gold concentrates by

    201931ensp;0183;ensp;that gold recovery is difficult by thiosulfate leaching without any pretreatment, and the recovery of gold only is 10.1%. After roasting and oxidizing, the gold leaching rate increases substantially. The leaching rate of gold reaches 71.2% with the optimal leaching technological parameters (Li et al.,

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