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Relevant bibliographies by topics / Gold leaching

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Academic literature on the topic 'Gold leaching'

Author: Grafiati

Published: 11 December 2022

Last updated: 25 January 2023

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Journal articles on the topic "Gold leaching"

1

Chang, Siu Hua, and Siti Fatimah Abdul Halim. "Recovery of Precious Metals from Discarded Mobile Phones by Thiourea Leaching." Materials Science Forum 962 (July 2019): 112–16. http://dx.doi.org/10.4028/www.scientific.net/msf.962.112.

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The objective of this work was to recover gold and silver from the printed circuit board (PCB) of discarded mobile phones by thiourea leaching. Effects of thiourea concentration, leaching temperature, leaching time, and ferric ion (Fe3+) concentration on the recovery of gold and silver were investigated. The PCB was pretreated physically to reduce the thiourea consumption and enhance the leaching process. It was found that the percentage of gold leaching was higher than that of silver at different conditions studied. The highest percentages of gold (96%) and silver (90%) leachings were achieved with 20 g/L of thiourea and 8 vol% of Fe3+ at 4 h of leaching time and 25°C of leaching temperature.

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2

Cho, Kanghee, Hyunsoo Kim, Eunji Myung, Oyunbileg Purev, Nagchoul Choi, and Cheonyoung Park. "Recovery of Gold from the Refractory Gold Concentrate Using Microwave Assisted Leaching." Metals 10, no. 5 (April 28, 2020): 571. http://dx.doi.org/10.3390/met10050571.

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Microwave technology has been confirmed to be suitable for use in a wide range of mineral leaching processes. Compared to conventional leaching, microwave-assisted leaching has significant advantages. It is a proven process, because of its short processing time and reduced energy. The purpose of this study was to enhance the gold content in a refractory gold concentrate using microwave-assisted leaching. The leaching efficiencies of metal ions (As, Cu, Zn, Fe, and Pb) and recovery of gold from refractory gold concentrate were investigated via nitric acid leaching followed by microwave treatment. As the acid concentration increased, metal ion leaching increased. In the refractory gold concentrate leaching experiments, nitric acid leaching at high temperatures could limit the decomposition of sulfide minerals, because of the passive layer in the refractory gold concentrate. Microwave-assisted leaching experiments for gold recovery were conducted for the refractory gold concentrate. More extreme reaction conditions (nitric acid concentration > 1.0 M) facilitated the decomposition of passivation species derived from metal ion dissolution and the liberation of gangue minerals on the sulfide surface. The recovery rate of gold in the leach residue was improved with microwave-assisted leaching, with a gold recovery of ~132.55 g/t after 20 min of the leaching experiment (2.0 M nitric acid), according to fire assays.

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Zhu, Chao, Bao Liang Ge, Zhao Yi Lu, and Wen Zhu. "Biooxidation Pretreatment Cyanide Leaching of a Flotation Gold Concentrate." Advanced Materials Research 581-582 (October 2012): 1106–9. http://dx.doi.org/10.4028/www.scientific.net/amr.581-582.1106.

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This study reached a gold ore which contain 3.83g/t gold, to investigate the available gold recover methods, direct cyanide leaching test and “biooxidation-cyanide” leaching process were utilized after enrich gold by flotation. When regrinding the flotation concentrate to 95% -325mm, the leaching rate of “biooxidation-cyanide” leaching reached 94.47%, compare with direct leaching, the leaching rate increased almost 67%. Obviously bacterium oxidation is a useful pretreatment for gold leaching.

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4

Yanbo, Chen, Qin Guanglin, Li Guangsheng, Zhu Xingfu, Yu Congquan, Lu Zhongbo, Ji Qiang, et al. "Experimental study on thiosulfate leaching of gold from a high copper gold concentrate." E3S Web of Conferences 271 (2021): 04001. http://dx.doi.org/10.1051/e3sconf/202127104001.

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The conventional cyanide leaching process is used to extract gold from a high copper gold concentrate. Because the copper associated minerals consume sodium cyanide in large quantities, the cost of the reagents is high and the economic benefit is not ideal. At the same time, a large number of cyanide tail slag are produced, which brings a series of environmental problems. In order to solve the environmental problems caused by excessive sodium cyanide consumption and cyanogen slag, the feasibility of leaching gold by thiosulfate in copper ammonia system was studied. The gold leaching rate of thiosulfate was increased to more than 90% by using the direct thiosulfate leaching process and pretreatment thiosulfate leaching process, which was close to the gold leaching index of sodium cyanide at the production site.

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Tang, Ping, Jing Liu, Min Wei Song, Hai Ping Yu, and Xu Zhang. "Study on the Gold Leaching Process by Potassium Ferricyanide." Materials Science Forum 814 (March 2015): 273–77. http://dx.doi.org/10.4028/www.scientific.net/msf.814.273.

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The traditional gold leaching method is cyanidation, which carries serious security and environmental problems. More and more attention is paid to the research on non-cyanide process. A high-arsenic-and-sulphur refractory gold concentrate in Sichuan was taken as the object of study. After the roasting-oxidation pretreatment of the sample, potassium ferricyanide was adopted to carry on the process experiment on gold-leaching. The leaching results as well as correlative process conditions were both investigated. The results showed that good leaching effects could be achieved by potassium ferricyanide. When the amount of potassium ferricyanide was 60g/L, the concentration of NaOH 0.2mol/L, the liquid-solid ratio 6:1 and the leaching process at room temperature lasted for 20h, the gold leaching rate reached 88.1%. If the leaching aid CaO2 is added simultaneously, it can contribute to the gold leaching. When the amount of CaO2 was 3g/L, the gold leaching rate increased to more than 94%, the amount of potassium ferricyanide decreased to 50g/L and the leaching time reduced to 14h.

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6

Chen, Bo Wei, Jian Zhi Sun, He Shang, Biao Wu, and Jian Kang Wen. "Biooxidation of a Refractory Gold Ore: Implications of Whole-Ore Heap Biooxidation." Solid State Phenomena 262 (August 2017): 65–69. http://dx.doi.org/10.4028/www.scientific.net/ssp.262.65.

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The Sawayardun Gold Mine, the first Muruntau type gold mine in China, was located in the south Tianshan Mountain, Xinjiang Province. The gold reserve was 127 t with an average gold grade of 2.36 g/t. Due to the high content of arsenic and antimony, the traditional flotation-roasting-cyanidation process was not suitable. The direct cyanidation gold extraction for the raw ore was 44.70 %. Thus, biooxidation experiments in shaker flasks were conducted for this ore. The optimum conditions were obtained as inoculation volume 10 %, initial pH 1.7, pulp density 15 %, temperature 33 °C, leaching time 10 days, with the arsenic oxidation rate of 75.12 %. Then the biooxidation residues were test for gold leaching using NaCN, green gold leaching agent and thiourea. After 24 h leaching rate at pulp density of 33%, gold leaching agent dosage of 2 kg/t ore, the gold extraction for NaCN, green gold leaching agent and thiourea were 91.50 %, 86.23 % and 91.09 %, respectively. The high gold extraction showed a bright future for the whole-ore heap biooxidation of this refractory gold ore.

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7

Yessengarayev, Ye K., B. S. Baimbetov, S. V. Mamyachenkov, B. N. Surimbayev, and N. G. Prozor. "Study of the process of cyanide leaching of gold using sodium acetate at different ore sizes." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 1, no. 312 (June 15, 2020): 59–68. http://dx.doi.org/10.31643/2020/6445.08.

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Intensification of metal extraction by leaching is a complex of organizational and technical measures aimed at achieving the fastest and complete extraction of metal from ore. Measures to intensify leaching are aimed at completely or partially neutralizing the causes that cause a decrease in the leaching rate. Tests were performed on cyanide leaching of gold from gold-containing ore with the addition of sodium acetate to intensify the leaching process. The results of assay-gravimetric, chemical, mineralogical and granulometric analysis of oxidized ore are presented. According to electron-probe analysis, gold in the ore is present in the form of thin (micron) inclusions in minerals and ore rocks. A study was conducted on leaching of crushed ore with a size of 90% of the class -0.074 mm and crushed ore with a size of -12+0 mm. Leaching of crushed ore with a size of 90% of the class -0.074 mm showed that when adding sodium acetate, the gold recovery rate increases by 1.13 % compared to leaching without adding this reagent. When leaching crushed ore with a size of -12 + 0 mm with the addition of acetate, gold recovery increases by an average of 4 %, and the kinetics of gold dissolution improves. Research data prove that sodium acetate can be used to intensify gold at a ore size of -12+0 mm and in larger ore classes for leaching gold.

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Yessengarayev, Ye K., B. N. Surimbayev, B. S. Baimbetov, S. V. Mamyachenkov, and T. S. Kanaly. "Ore treatment hydrogen peroxide during heap leaching of gold." Kompleksnoe ispolʹzovanie mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik shikisattardy Keshendi Paidalanu 316, no. 1 (March 15, 2021): 5–14. http://dx.doi.org/10.31643/2021/6445.01.

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Over the past century, many problems have been focused on the problems of low leaching rate of gold and methods have been developed to intensify the leaching of gold. Among these methods, the use of hydrogen peroxide to accelerate the leaching of gold is known. In order to intensify the leaching process, the indicators of cyanide leaching of gold from ore using hydrogen peroxide were studied. This article presents the results of assay-gravimetric, chemical, and mineralogical analyses of gold-bearing ore from the Sari Gunay Deposit (Iran). The content of sulfide sulfur ore belongs to the category of low-sulphide, by oxidation of sulphur (50.70%) to the category of oxidized ores. Thermodynamic analysis of possible reactions of ore components with hydrogen peroxide is carried out. Laboratory studies on cyanide leaching of gold have shown that the maximum recovery of gold is 52.92% at a concentration of hydrogen peroxide of 0.5%, the recovery of gold without ore treatment is 52.03%. The results of laboratory and column tests with and without treatment with hydrogen peroxide (H2O2–0.5%) were compared. Treatment of gold-bearing ore with hydrogen peroxide during heap leaching of gold increases gold recovery by 1.2% and amounts to 55.89%, without treatment - 54.69%. This increases the consumption of sodium cyanide by 0.04 kg/t.

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9

Chao, Xu, Cai Mingming, Gao Tengyue, Li guangsheng, Zhu xingfu, Lu Zhongbo, Chen Yanbo, et al. "Study on Technological Process Innovation of Non-Cyanide Leaching." E3S Web of Conferences 267 (2021): 02064. http://dx.doi.org/10.1051/e3sconf/202126702064.

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Nowadays, there are many gold leaching processes, and the dominant one is cyanidation, but the virulence of cyanidation seriously endangers the environment and human health. In order to reduce environmental pollution and improve the recovery rate of gold, metallurgical workers put forward a variety of new gold leaching methods, which can be roughly divided into two types: one is to develop pretreatment technology on the basis of traditional cyanidation method; The other is non-cyanide leaching of gold. Based on the existing Non-Cyanide leaching technology, this paper puts forward the process innovation of Non-Cyanide leaching technology, thiourea method and dilute nitric acid pre-oxidation treatment process. The thiourea non-cyanide leaching system was investigated. According to the leaching situation of gold and silver in raw ore, the innovative scheme of gold and silver leaching technology was selected. Compared with other treatment methods, thiourea method and dilute nitric acid pre-oxidation treatment technology overcome the danger of high pressure, and the nitrogen oxide gas produced in the dilute nitric acid oxidation process can be recycled, which basically does not pollute the environment.

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Luo, Xian Ping, Min Hu, Chang Li Liang, and Qing Hai Ge. "Research on the Gold Ore Leaching in Iodine-Iodide System." Advanced Materials Research 634-638 (January 2013): 3227–33. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.3227.

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Iodine-iodide leaching gold ore is a promising method alternative to cyanide leaching. In this paper, Eh—pH diagram of Au-I--I2-H2O system was established through calculating the equilibrium potentials of the main chemical reactions based on the thermodynamic data of the actual iodide leaching of gold system. Gold ore leaching experiments in iodine-iodide system under different influence factors were carried out to verify the effectiveness of the Eh-pH diagram. The results indicated the diagram of Eh-pH can effectively guide the actual gold ore leaching in iodine-iodide system.

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Dissertations / Theses on the topic "Gold leaching"

1

Barbosa, Filho Olavo. "Thiocyanate leaching of gold." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46663.

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2

Xia, Chen. "Thiosulphate stability in gold leaching process." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ59414.pdf.

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3

Muslim, Abrar. "Thiosulfate leaching process for gold extraction." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/896.

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Increasing environmental concerns over the use of cyanide for gold recovery has intensified the need to deeply understand gold thiosulfate leaching system. Therefore, experimental and modelling work for the kinetics and equilibrium adsorption of thiosulfate, polythionates, gold and copper onto strong based anion exchange resin have been conducted in this study, and the results are concisely discussed in the thesis. Experimental procedures, reaction mechanisms and novel dynamic models for the adsorption phenomena were also proposed.

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4

Sitando, Onias. "Gold Leaching in Thiosulfate-Oxygen Solutions." Thesis, Sitando, Onias (2017) Gold Leaching in Thiosulfate-Oxygen Solutions. PhD thesis, Murdoch University, 2017. https://researchrepository.murdoch.edu.au/id/eprint/38239/.

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5

Diaz, Miguel Angel. "Electrowinning coupled to gold leaching by electrogenerated chlorine." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/38284.

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6

Lotter, Nadia. "Cyanide volatilisation from gold leaching operations and tailing facilities." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-04162007-153634.

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7

Qi, Peihao 1957. "Leaching and electrochemical behavior of gold in iodide solutions." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/291587.

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Of the halogens, the gold iodide complexes are the most stable in aqueous solutions. A series of experiments was performed to investigate the kinetics and mechanism of the leaching reaction between gold and iodide. Using a rotation disk technique, the most important kinetic parameters were measured. The reaction rate was found to be first order with respect toI⁻₃ and half order with respect to I⁻. A gold leaching rate of about 2.6 x 10⁻⁹ mol/cm²·sec for 10⁻² M I⁻ and 5 x 10⁻³ M I₂ was obtained. This value is close to that for typical cyanidation. The reaction rate appears to be controlled mainly by diffusion of reactants through the boundary layer of solution to the gold electrode under the conditions studied. The electrochemical study of gold in different halide solutions, with emphasis on iodide, was also carried out. The electrochemical techniques used in this investigation include cyclic voltammetry and linear sweep voltammetry. The results displayed the sequential oxidation for gold dissolution in iodide solution and confirmed that iodide has the strongest oxidation capability of dissolving gold of the halides.

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8

Sanchez-Corrales, Victor Manuel. "Electrochemical leaching of gold-bearing arsenopyrite in alkaline cyanide solutions." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184952.

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Rest potential measurements, cyclic voltammetry, linear sweep voltammetry and constant potential coulometry were used to determine the electrochemical response of arsenopyrite in the absence and in the presence of cyanide and to determine its dissolution chemistry. Surface oxidation of arsenopyrite is proposed to proceed by a two-step reaction sequence. FeOOH, H₂AsO₃⁻, and Sᵒ, are produced in the initial step. Oxidation of Sᵒ to SO₄²⁻, and H₂AsO₃⁻ to HAsO₄²⁻ account for the second step. Coulometric results confirmed that 14 electrons are involved in the overall reaction. The implications of these results on the cyanidation of arsenical gold-bearing concentrates were also investigated. The response of four different concentrates to various cyanidation techniques was examined. Alkaline pressure oxidation in 1 M NaOH, at 200°C and under 500 psi of oxygen overpressure followed by conventional cyanidation resulted in 81% gold extraction from a concentrate that yielded only 2% gold extraction after direct cyanidation.

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9

Breuer, Paul 1968. "Gold leaching in thiosulfate solutions containing copper(II) and ammonia." Monash University, Dept. of Chemical Engineering, 2002. http://arrow.monash.edu.au/hdl/1959.1/7762.

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10

Khalesi, Mohammad Reza. "Integrated modeling of grinding, liberation and leaching of gold ores." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27466/27466.pdf.

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Books on the topic "Gold leaching"

1

Hiskey, J. B. Leaching behavior of gold in iodide solutions. Parkville: Australasian Institute of Mining and Metallurgy, 1991.

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2

Bhakta, P. Alkaline oxidative leaching of gold-bearing arsenopyrite ores. Washington, D.C: Bureau of Mines, U.S. Dept. of the Interior, 1989.

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Bhakta, P. Alkaline oxidative leaching of gold-bearing arsenopyrite ores. Washington, DC: Dept. of the Interior, 1989.

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4

Lin, H. K. Ferric chloride leaching of the Delta sulfide ores and gold extraction from the leaching residue. Fairbanks, Alaska: Mineral Industry Research Laboratory, University of Alaska, 1988.

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5

Mineev, G. G. Biometallurgii͡a︡ zolota. Moskva: "Metallurgii͡a︡", 1989.

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6

Luong, H. V. Microbial leaching of arsenic from low-sulfide gold mine material. S.l: s.n, 1985.

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7

Hoye, Robert L. Gold/silver heap leaching and management practices that minimize the potential for cyanide releases. Cincinnati, OH: U.S. Environmental Protection Agency, Research and Development, Hazardous Waste Engineering Research Laboratory, 1988.

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8

Hoye, Robert L. Gold/silver heap leaching and management practices that minimize the potential for cyanide releases. Cincinnati, OH: U.S. Environmental Protection Agency, Research and Development, Hazardous Waste Engineering Research Laboratory, 1988.

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9

Poell, James G. Residual cyanide distribution in a neutralized gold leach heap: Final report. Bozeman, Mont: Reclamation Research Unit, Montana State University, 1994.

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10

A, Eisele J. Leaching gold-silver ores with sodium cyanide and thiourea under comparable conditions. Pittsburgh, Pa: U.S. Dept. of the Interior, Bureau of Mines, 1988.

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Book chapters on the topic "Gold leaching"

1

Yannopoulos, J. C. "Leaching Low-Grade Gold Ores." In The Extractive Metallurgy of Gold, 115–36. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8425-0_6.

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2

Yannopoulos, J. C. "Alternative Leaching Reagents for Gold." In The Extractive Metallurgy of Gold, 171–84. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8425-0_9.

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3

Barbosa-Filho, O., and A. J. Monhemius. "Iodide—thiocyanate leaching system for gold." In Hydrometallurgy ’94, 425–40. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1214-7_27.

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Dou, Aichun. "Pressure Oxidation Leaching of Gold-Antimony Alloy." In Rare Metal Technology 2016, 109–20. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48135-7_11.

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Dou, Aichun. "Pressure Oxidation Leaching of Gold-Antimony Alloy." In Rare Metal Technology 2016, 109–20. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119274834.ch11.

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6

Li, Chao, Hongxu Li, Xie Yang, Shuai Wang, and Lifeng Zhang. "Gold Leaching from a Refractory Gold Concentrate by the Method of Liquid Chlorination." In Rare Metal Technology 2015, 71–77. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093244.ch9.

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Li, Chao, Hongxu Li, Xie Yang, Shuai Wang, and Lifeng Zhang. "Gold Leaching from a Refractory Gold Concentrate by the Method of Liquid Chlorination." In Rare Metal Technology 2015, 71–77. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48188-3_9.

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de Carvalho, Felipe A., Andrea Resende, and Versiane A. Leão. "Gold Leaching by Sodium Chloride and Calcium Hypochlorite Solutions." In The Minerals, Metals & Materials Series, 1787–96. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95022-8_148.

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Yang, Yong-bin, Xiao-liang Liu, Tao Jiang, Qian Li, Bin Xu, and Yan Zhang. "Gold Leaching Characteristics and Intensification of a High S and As-Bearing Gold Concentrate." In Characterization of Minerals, Metals, and Materials 2015, 719–26. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093404.ch91.

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Yang, Yong-bin, Xiao-liang Liu, Tao Jiang, Qian Li, Bin Xu, and Yan Zhang. "Gold Leaching Characteristics and Intensification of a High S and As-Bearing Gold Concentrate." In Characterization of Minerals, Metals, and Materials 2015, 719–26. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48191-3_91.

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Conference papers on the topic "Gold leaching"

1

Ubaldini, S., C. Abbruzzese, F. Vegliò, and M. Trifoni. "Leaching pretreatment for gold-bearing refractory stibnite." In The 8th International Mineral Processing Symposium. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203747117-100.

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Arslan, F., and B. Sayiner. "Ammoniacal thiosulphate leaching of Ovacik gold ore." In The 8th International Mineral Processing Symposium. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203747117-99.

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Li, Wen-Juan, Liu-Lu Cai, Yong-Sheng Song, Gui-Ying Zhou, and Yong Chen. "Gold Recovery from a Gold Tailing by Floatation and Thiourea Leaching." In 2nd Annual International Conference on Advanced Material Engineering (AME 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/ame-16.2016.123.

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Vorobyev, Alexander. "GEOTECHNOLOGIES OF HEAP LEACHING THE GOLD FROM ROCK DUMPS." In 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings. STEF92 Technology, 2019. http://dx.doi.org/10.5593/sgem2019/1.3/s04.108.

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Sekisov, Arthur. "COMPARATIVE RESEARCH OF CYANIDE AND SULFATE-CHLORIDE GOLD LEACHING FROM OXIDIZED GOLD-COPPER ORE." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/1.4/s04.005.

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Jun, Zhang, Mao Zhi-zhong, and Jia Run-da. "Study on hybrid modeling approach for gold cyanidation leaching process." In 2013 25th Chinese Control and Decision Conference (CCDC). IEEE, 2013. http://dx.doi.org/10.1109/ccdc.2013.6561176.

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Villas-Boas, R. C., and L. R. P. De Andrade Lima. "Modeling of gold heap leaching for criteria of sustainability targets." In Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296). IEEE, 1999. http://dx.doi.org/10.1109/ipmm.1999.792531.

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Zhang, Shulei, Runda Jia, Weimin Zhang, and Hongru Chen. "Data-Driven Nonlinear Robust Optimization for Gold Cyanidation Leaching Process." In 2021 33rd Chinese Control and Decision Conference (CCDC). IEEE, 2021. http://dx.doi.org/10.1109/ccdc52312.2021.9602506.

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Mingyu, Li, Zhu Xiaoqiang, Zhou Li, Xie Yufei, and Zheng Peikai. "Extraction of Gold from Alkaline Gold Leaching Solution by Tertiary Amine N235 and Phosphine Oxide." In 2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM). IEEE, 2011. http://dx.doi.org/10.1109/cdciem.2011.458.

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Li, Jing-Ying, and Huang Lu. "The Leaching Gold and Silver from E-Waste by LSSS Method." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2010). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517461.

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Reports on the topic "Gold leaching"

1

Leybourne, M. I., J. M. Peter, M A Schmidt, D. Layton-Matthews, A. Voinot, and L. Mathieu. Geochemical evidence for a magmatic contribution to the metal budget of the Windy Craggy Cu-Co(±Zn) volcanogenic massive-sulfide deposit, northwestern British Columbia. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328018.

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Volcanogenic massive-sulfide (VMS) deposits may have had metal contributions from magmatic degassing and leaching of footwall rocks. The Windy Craggy Cu-Co-Zn VMS deposit in northwestern British Columbia may include magmatic contributions, based on laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) of fluid inclusions (enriched in Sb, Sn, and Bi) and lithogeochemistry. Sulfide-mineral trace-element abundances in the massive-sulfide orebody, underlying stockwork zone, gold zone, and altered and unaltered mafic rock and argillite were analyzed by LA-ICP-MS. Elevated Au, W, As, Bi, Sb, Se, Te, Tl, Ag, Co, and Mo contents occur within the gold and/or stockwork zones. Increasing 'magmatic metals' with increasing Co/Ni values suggest direct magmatic contribution to the deposit. Covariation of Co with these so-called 'magmatic elements' indicates that it, too, may be of magmatic origin, sourced via fluids exsolved from a crystallizing magma; however, evidence from the composition of rocks and sulfide minerals from Windy Craggy and other VMS deposits suggests that there is probably no meaningful distinction between hydrothermal leaching and direct magmatic contributions and that most - if not all - fluids that form VMS deposits should be termed 'magmatic-hydrothermal'.

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