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leaching of from waste mobile phones Ha V.H., Lee J.-C., Jeong J., Hai H.T., Jha M.K. Institute for Environmental Science and Technology, Hanoi University of Technology HUT, 1 - Dai Co Viet, Hanoi, Viet Nam Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources KIGAM, 92, Gwahang-no, Yuseong-gu, Daejeon 305-350, South Korea Metal ...read more
· Gold extraction in ammonium thiosulfate medium from natural Au ores, which , is already well understood Ilyas and Lee, 2018, Molleman and Dreisinger, 2002 Langhans and Carnahan, 1992. In Au extraction from e-wastes, however, the effects of coexisting metals e.g., Cu, Zn, Al, Fe, Pb and Ni, which are abundant in e …read more
FIELD OF THE INVENTION. This invention relates to the recovery of precious metals, such as and silver, from aqueous ammoniacal leach solutions by of the precious metal values from the aqueous leach solution with organic amine extractants, such as guanidine compounds or mixtures of a quaternary amine and a phenol.read more
Successful gold production uses patented thiosulfate processing method. Ausenco has been involved in Barrick’s gold processing operations at the Goldstrike Mine for nearly a decade. Goldstrike is Barrick’s largest and most productive mining operation, with gold production of more than 40 million ounces since 1987 It is located on the Carlin Trend, approximately 40 km north-west of Elko, Nevada, USA.read more
Thiosulphate leaching is cyanide. Although not as aggressive a leaching agent as cyanide, thiosulphate offers several technological advantages including its lower toxicity and greater efficiency with gold deposits associated with preg-robbing ores.read more
Two models were generated from the data for predicting and low consumption within the experimental region. The models predicted 90-pct and a consumption of 0.2 Kg s2o2- 3/t ore at 0.20M s2o2-3, 0.00625M so2-3, 0.001.M cu2+, 0.09M nh4oh, and leaching for 48 h.read more
A review of using noncyanide lixiviants: Fundamentals, advancements, and challenges toward alkaline sulfur-containing leaching agents. ... A review of factors affecting leaching in non-ammoniacal solutions including degradation and in-situ generation of . Hydrometallurgy 2018, 178 , 151-175.read more
Sodium is one component of an alternative lixiviant to cyanide for of . It forms a strong complex with I ions, [AuS 2 O 3 2 ] 3- . The advantage of this approach is that is essentially non-toxic and that ore types that are refractory to cyanidation e.g. carbonaceous or Carlin type ores can ...read more
A Comparison of Cyanide and Leaching for the Recovery of from a Copper Containing Ore Dai, X. / Chu, C. K. / Jeffrey, M. / Breuer, P. / TMS | 2003 print versionread more
Sodium is used in , water treatment, analytical chemistry, the development of silver-based photographic film and prints, and medicine. The medical uses of sodium include treatment of cyanide poisoning and pityriasis. It is on the World Health Organizations List of Essential Medicines, the safest and most ...read more
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