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Gold Extraction from an Oxide Ore by Thiourea Leaching with Hydrogen Peroxide as an Oxidant
Russian Journal of Non-Ferrous Metals = Izvestiya VUZ. Tsvetnaya Metallurgiya, 2021 In this study, the effects of thiourea (CH4N2S) on the efficiency of gold dissolution were investigated for the extraction of gold from an oxide gold ore of the eastern Anatolia region, Turkey.
Mert Terzi
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Reaction chemistry of gold leaching in thiourea solution for a Turkish gold ore
Hydrometallurgy, 2002 This study was carried out on a finely disseminated gold-bearing ore from Kaymaz, Turkey. The main objective was to determine the mechanism of reaction between thiourea and Fe 31 in the thiourea leaching of gold.
Atalay, U, Orgul, S
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A REVIEW OF GOLD LEACHING IN ACID THIOUREA SOLUTIONS
Mineral Processing and Extractive Metallurgy Review, 2006Since the initial report of thiourea as a complexing reagent for gold leaching, considerable research has been directed toward the use of thiourea as an alternative to cyanide for gold extraction from different auriferous mineral resources. At the same time, some fundamental investigations of the system have been reported.
Jan D Miller
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Gold Leaching in an Alkaline Thiourea Solution
Journal of The Electrochemical Society, 1999Gold leaching by thiourea has been investigated in an alkaline solution. In the presence of both Na 2 SO 3 and Na 2 S 2 O 8 , the chemical dissolution of gold can be accomplished in the alkaline thiourea solution. It was found that used as a buffer, SO 2- 3 can prevent thiourea from further decomposing into some insoluble species in contact with the
Dawei Wei +3 more
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Catalytic effect of ethylene thiourea on the leaching of chalcopyrite
Hydrometallurgy, 2020Abstract Chalcopyrite leaching in acidic ferric sulfate media was improved by addition of ethylene thiourea (ETU) in shaking flask tests with the iron-oxidizing bacterium acidithiobacillus ferrooxidans. In bioreactor experiments, ETU was able to solubilize the chalcopyrite even after the mineral was pre-leached under non-catalytic conditions. Surface
Zihe Ren +5 more
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A novel bio-oxidation and two-step thiourea leaching method applied to a refractory gold concentrate
Hydrometallurgy, 2017Guo-Hua Wang, Xue Guo, Dianzuo Wang
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Technology of Gold Extraction from Mature Dumps by Thiourea Leaching
Russian Journal of Non-Ferrous Metals, 2020Tajikistan has a large volume of gold-containing dumps, which on conversion to gold equals ~18 t. These dumps are products of amalgamation and cyanidation processes, resulting from treating the ores from Tarorskoe, one of the largest deposits in Tajikistan, and from a few other nearby deposits: Dzhilau, Khirskhon, and Olimpiiskoe.
I. Р. Boboev +3 more
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GOLD LEACHING BY USE OF AN N,N′-DISUBSTITUTED THIOUREA
Separation Science and Technology, 2001A novel reagent for gold leaching was synthesized and the leaching conditions investigated. The reagent, 1-phenyl-2-thio-3-(2-hydroxyethyl) urea, dissolved gold at relatively high yields (>95%) in the presence of an oxidant (Fe(III)) in a sulfuric acid solution at pH 0.9–1.2 at room temperature.
Adnan Aydin, Esra Kaki, Ahmet Aydin
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Leaching of gold from a chalcopyrite concentrate by thiourea
Hydrometallurgy, 1988Abstract A gold containing chalcopyrite concentrate has been treated with thiourea using H 2 SO 4 . The effects of some leach parameters such as thiourea concentration, oxidizing agents, redox potential, pH, temperature, pulp density, acid pretreatment and SO 2 addition have been investigated.
G. Deschênes, E. Ghali
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