· Abstract Electronic waste is a dominant global issue with over 50 million tons generated annually. Still, as an amalgamation of precious and rare raw materials, electronic waste is a considerable economic resource with the most valuable components located on the printed circuit boards. Gold is widely used in electronics in numerous
Consulta
· 1. Introduction For many years, thiosulphate gold leaching has received considerable attention as an alternative technology to the cyanidation of gold ores due to environmental reasons and the reduction of the amount of easily extracted gold ore. (Abbruzzesse et al., 1995, Aylmore and Muir, 2001, Senanayake, 2007) (Li and Miller,
Consulta
· Preg-robbing was found to increase when Preg-robbing phenomena in thio,alphate leaching of gold ores 1401 the initial gold concentration was increased. Gold adsorption was also increased with a decrease in particle size. Prep-robbing was reduced to a large extent even at a low free thiosulphate concentration of 0.05 M.
Consulta
The application of pressure oxidation (POX) followed by thiosulfate gold leaching is an efficient method used to extract gold from double refractory gold ores containing both
Consulta
DOI: 10.1016/J.MINENG.2006.04.011 Corpus ID: 93809931 Review of rate constants for thiosulphate leaching of gold from ores, concentrates and flat surfaces: Effect of host minerals and pH (Review) In this research cyanide
Consulta
· A pre-treatment process with oxidative ammoniacal solution enhanced the thiosulphate leaching of the sulphide ore, while the thiosulphate consumption was substantially reduced. The sulphide minerals partially decomposed in the pre-treatment process, exposing gold to the leach solution. Oxygen input by air bubbling and a longer
Consulta
· 39] Chloride Potential for leaching refractory ores, high gold dissolution rate than many (if not all The yield of the gold extract with thiosulphate solution was greater than that of thiourea
Consulta
· Abstract. 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. The thiosulfate leaching process it catalysed by
Consulta
· Thiosulphate leaching: Recovery of gold from pregnant leach solutions and industrial applications-Part II December 2017 Authors: Firat Ahlatci Eti Mine Ersin Yener Yazıcı Karadeniz Technical
Consulta
· open access. Numerous non-cyanide leaching lixiviants have been developed, among which thiosulfate is considered the most promising alternative to cyanide due to its non-toxicity, low price, high leaching rate and excellent characteristics in
Consulta
· Thiosulfate Leaching of Gold. February 2018. DOI: 10.1201/9781315150475-4. In book: Gold Metallurgy and the Environment (pp.103-126) Authors: Sadia Ilyas. Hanyang University. Aqsa Zia.
Consulta
· KEYWORDS Thiosulphate leaching, gold/silver, refractory gold ores, experimental design method. Effect of copper concentration for extraction of Au, (a) 0.75 M S2O3 2-and 1.5 NH3; (b) 0.75 M S2O3 2
Consulta
: Bin Xu, Wenhao Kong, Qian Li, Yongbin Yang, Tao Jiang, Xiaoliang Liu10 · The non-ammonia thiosulfate leaching system is considered to be an attractive and eco-friendly route for gold leaching without the usage of cyanide or
Consulta
: Gamini Senanayake · The use of tartrate as an alternative reagent to ammonia offers a green and eco-friendly choice for gold extraction. In this work, the effect of temperature, pH,
Consulta
2 · A systematic research of solution circulation for gold extraction from a gold ore with an integrated low potential thiosulfate leaching-resin adsorption recovery process
Consulta
· A review of literature data for different types of sulphide concentrates and gold ores has been carried out to examine the impact of host minerals and pH upon gold leaching. Analysis of initial rate data over the first 30–60 min of gold leaching from sulphide concentrates or silicate ores over a range of ammonia, thiosulphate, and
Consulta
· Thiosulfate leaching has been regarded as a promising alternative to cyanidation, but it still faces the challenge of the recovery of low content of gold from high concentrations of thiosulfate solutions. Liquid–liquid extraction is a method to address this issue but is still limited by the use of volatile and toxic organic solvents. To overcome this
Consulta
· Copper-gold ores prove difficult to treat with conventional cyanide leaching process due to severe interference of copper minerals with cyanide leaching. Most of the copper minerals readily react
Consulta
· Oxygen input by air bubbling and a longer contact time enhanced the oxidative ammonia pre-treatment process and hence accelerated subsequent thiosulphate leaching of the sulphide ore. Gold
Consulta
· Ammoniacal thiosulphate leaching of gold finds a better substitute as it is non-toxic and environmentally safe as compared to the toxic cyanide system for gold extraction. In the present study, an
Consulta
· Abstract. Thiosulphate leaching of precious metals has been developed as an alternative and non-toxic technique to the conventional cyanidation. This process has advantages over cyanide in a decreased interference from foreign cations and a lower environmental impact. Ammoniacal thiosulphate solution allows the solubilization of
Consulta
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
Consulta
DOI: 10.1016/J.MINPRO.2009.11.002 Corpus ID: 93989940 Oxidative pre-treatment in thiosulphate leaching of sulphide gold ores @article{Feng2010OxidativePI, title={Oxidative pre-treatment in thiosulphate leaching of sulphide gold ores}, author={Dingwu Feng and
Consulta
· It was found that cyanide leaching was the better performing technology compared to thiosulphate leaching, as it achieved gold extractions of 71.6%, 69.7%, and 67.8% for the three ore samples
Consulta
· Senanayake, G. Gold leaching by copper (II) in ammo niacal thiosulphate soluti ons in the presence of additives. Part I: A review of the effect of hard–soft and Lewis acid-base properties and
Consulta
· Feng et al. [2001] studied the preg-robbing phenomena of some minerals and claimed that chalcopyrite, pyrite, arsenopyrite, sphalerite and kaolinite were pregrobbing in thiosulfate leaching
Consulta
· There have been many reports on the thiosulphate leaching of gold/silver ores and concentrates (Aylmore, 2001;Ahlatci, 2016;Ahlatci et al., 2018;Bas et al., 2011;Celep et al., 2014;Molleman and
Consulta
sulfide gold ores. The present study is primarily focused on ammonium thiosulfate leaching of gold (Au) and silver (Ag) from the sulfide ore (Sunshin mine in South Korea). The main chemical composition of the concentrate was Au (84 ppm), Ag (852 ppm), Fe (18.
Consulta
In this current study, the extraction of gold from a high grade copper-rich gold ore by copperassisted ammoniacal thiosulphate leaching was studied by adopting Taguchi L9, (3) experimental design approach. The effects of concentration of thiosulphate, (10-500 mM S2O3), copper (0-25 mM Cu), and ammonia (5-1000 mM NH3) on the extent of gold
Consulta
· Copper-rich and preg-robbing refractory ores, for which traditional cyanide leaching fails to effectively extract gold in an economically and technically sound way, respond well to thiosulphate leaching (Aylmore and Muir, 2001; Marsden and House, 2006; Wang et al., 2020; Zhang and Senanayake, 2016).).
Consulta
Trituradora de piedra vendida por proveedores certificados, como trituradoras de mandíbula/cono/impacto/móvil, etc.
OBTENER COTIZACIÓN