Results 241 to 250 of about 832,680 (294)
Transactions of Nonferrous Metals Society of China, 2015 The treatment of a copper sulphide-bearing gold ore by direct cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching was investigated. Dissolution behaviour of gold and copper in these leaching systems was demonstrated.
Haci Deveci
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Radiotracer investigation in gold leaching tanks
Applied Radiation and Isotopes, 2012Measurement and analysis of residence time distribution (RTD) is a classical method to investigate performance of chemical reactors. In the present investigation, the radioactive tracer technique was used to measure the RTD of aqueous phase in a series of gold leaching tanks at the Damang gold processing plant in Ghana.
C P K, Dagadu +4 more
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Gold Leaching with Humic Substances
Journal of Mining Science, 2019The study results of gold leaching using the products of humic acids, as well as stage-by-stage fractionation of parent and gold-containing substances of these acids are presented. The gold content in the pregnant solution was up to 14–30 mg/l. Chemical analysis of the supernatant obtained by a stepwise change in pH of the solution and subsequent ...
A. V. Zashikhin, M. L. Sviridova
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Mineral Processing and Extractive Metallurgy Review, 2016 This literature review provides an update of ammoniacal thiosulfate as a potential lixiviant of gold, the history of thiosulfate leaching and recent progress on thiosulfate leaching of gold, as well as the production, oxidation, and stabilization of ...
G Senanayake
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Thiosulfate leaching of gold from waste mobile phones
Journal of Hazardous Materials, 2010 The present communication deals with the leaching of gold from the printed circuit boards (PCBs) of waste mobile phones using an effective and less hazardous system, i.e., a copper-ammonia-thiosulfate solution, as an alternative to the conventional and ...
Jae-chun Lee, Jinki Jeong
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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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The role of glycine in the ammonium thiocyanate leaching of gold
Hydrometallurgy, 2019 Thiocyanate leaching is an efficient and environmentally friendly method to extract gold due to fast leaching speed, excellent reaction selectivity and slight environmental risks, but thiocyanate is easily oxidized to decompose by oxidant in the leaching
Hao Wu, Yali feng, Huang Wanfu
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Anaerobic thiosulfate leaching: Development of in situ gold leaching systems
Minerals Engineering, 2008Ferric EDTA and ferric oxalate complexes are both effective oxidants for the aerobic and anaerobic dissolution of gold in thiosulfate solutions, and therefore are potential candidates for the development of an in situ leaching system. The thiosulfate and polythionates were quantified during leaching using HPLC with perchlorate eluent and an anion ...
J.A. Heath +3 more
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Feasibility of electrokinetic in situ leaching of gold
Hydrometallurgy, 2018Abstract Conventional gold mining operations are facing significant challenges due to declining ore grades and increasingly higher strip ratios. To meet global demands while limiting associated environmental impacts, alternative techniques to extract resources, including gold, are urgently needed.
Evelien Martens +6 more
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Developments in Gold Leaching: A Literature Survey
Mineral Processing and Extractive Metallurgy Review, 1990The gold industry has seen intense activity in the areas of exploration and metallurgy'in recent years. Many developments have taken piace through which ore bodies that were once considered uneconomical to exploit are becoming economical grade. Even the traditional cyanidation process has been modified during the course of time to make it more ...
A. R. UDUPA, S. K. KAWATRA, M. S. PRASAD
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