Home >> Products >> feng d van deventer j s j 2002 leaching behaviour of sulphides in ammoniacal thiosulphate systems hydrometallurgy
Home >> Products >> feng d van deventer j s j 2002 leaching behaviour of sulphides in ammoniacal thiosulphate systems hydrometallurgy
Leaching behaviour of sulphides in ammoniacal thiosulphate systems. Hydrometallurgy , Vol.63 no.2, 2002 M. Yalcin, A.I. Arol. Gold cyanide adsorption characteristics of activated carbon of non-coconut shell origin.
Feng and Van Deventer. ... Leaching behaviour of sulphides in ammoniacal thiosulphate systems. 551 ... Inst.R. J. / Hydrometallurgy 69 ...
"A Review of the Chemistry, Electrochemistry and Kinetics of the Gold Thiosulfate Leaching Process" Hydrometallurgy 2003-Fifth International Conference in Honor of Professor Ian Ritchie-vol. 1: Leaching and Solution Purification, Edited by C.A. Young, A.M. Alfantazi, C.G. Anderson, D.B. Dreisinger, B. Harris and a. James TMS (The
... and ore leaching systems. The type of thiosulphate salts was found ... rate during prolonged leaching ( Feng and van Deventer, ... the dissolution behaviour of gold in the ammoniacal ...
minerals (Feng and Van Deventer, 2002; Wan and Brierley, 1997; Wan et al., 1993). m Alexander Mining have developed a new ammonia heap leaching process for copper oxide deposits at their Leon copper project in Salta Province, northwest Argentina.
Mechano-chemical leaching in hydrometallurgy of complex sulphides: ... Feng et al. 2002: Leaching behaviour of sulphides in ammoniacal thiosulphate systems ...
D Feng, J.S.J Van Deventer. (2002) Leaching behaviour of sulphides in ammoniacal thiosulphate systems. ... oxidative ammonia leaching behaviour of multimetal sulphides.
Oxidative pre-treatment in thiosulphate leaching of sulphide gold ores Feng, D.; van Deventer, J.S.J. 2010-02-19 00:00:00 A diagnostic leaching showed that partial oxidation of the sulphide minerals in a gold ore was beneficial for thiosulphate leaching of gold. A pre-treatment process with oxidative ammoniacal solution enhanced the ...
Thiosulphate leaching has potential ... An understanding of the factors responsible for the leaching behaviour of uranium ... Lorenzen, L., Van Deventer J.S ...
The aim of this article is to evaluate the mineralogy and oxidation of the mineral throughout the leaching of gold using thiosulphate, particularly refractory gold.
D Feng, J.S.J Van Deventer. (2002) Leaching behaviour of sulphides in ammoniacal thiosulphate systems. (2002) Leaching behaviour of sulphides in ammoniacal thiosulphate systems. Hydrometallurgy 63:2, pages 189-200.
The results indicate that there was not much difference in gold leaching behaviour over the initial pH range of 9-11 (it should be noted that the pH tended to decline during leaching). ... Sample D, was subjected to thiosulfate leaching at 60° C. and 10 psig oxygen pressure at the natural pH of the slurry, for 8 hours. ... Process for ...
لينك دانلود. دانشکده فني و مهندسي. بخش مهندسي معدن. پايان نامه تحصيلي براي دريافت درجه کارشناسي ارش
Publications: Parker Cooperative Research Centre for Integrated Hydrometallurgy Solutions. ... Buswell, A.M. and Nicol, M.J. (2002) Some aspects of the electrochemistry of the flotation of pyrrhotite. ... Senanayake, G. (2005) Gold leaching by thiosulphate solutions: a critical review on copper(II)thiosulphateoxygen interactions.
لينك دانلود. دانشکده فني و مهندسي. بخش مهندسي معدن. پايان نامه تحصيلي براي دريافت درجه کارشناسي ارش
Feng, D. and van Deventer, J. S. J., ... 2010: Effect of Thiosulphate Salts on Ammoniacal Thiosulphate Leaching of ... J. and Pedlik, M., 1994: Leaching Behaviour of ...
LEACH RESIDUES BY AMMONIACAL THIOSULPHATE LEACHING R.M.G.S. Berezowsky Senior Research ~etallurgist and V. B. Sefton ... RECOVERY OF GOLD AND SILVER FROM OXIDATION LEACH RESIDUES BY AMMONIACAL THIOSULPHATE LEACHING R.M.G.S. Berezowsky and V.B. Sefton Sherritt Gordon Mines Limited ... of noble metals in ammoniacal and thiosulphate systems ...
Tiosulphate Leaching. ... LEACHING STUDIES WITH AMMONIACAL THIOSULPHATE Leaching ores A review of the literature24 showed that ... 11. Hydrometallurgy 2002.
See D. Feng & JSJVan Deventer, Leaching Behaviour of Sulphides in Ammoniacal ThiosulphateSystems, 63 HYDROMETALLURGY 189, 189-200 (2002). 57. See Hilson & Monhemius, supra note 37.
The leaching of ferrous sulphides such as pyrite, chalcopyrite and arsenopyrite released iron into the solution, which could precipitate on the sulphide surfaces in alkaline solutions and hence hinder further leaching (Feng and Van Deventer, 2002).
The aim of this article is to evaluate the mineralogy and oxidation of the mineral throughout the leaching of gold using thiosulphate, particularly refractory gold. Characterization techniques such as Polarized Light Microscopy (PLM), X-Ray Diffraction (XRD), and Scanning Electron Microscopy with X-Ray Microanalysis (SEM-EDS) were
D. Feng and J.S.J. Van Deventer, Leaching behaviour of sulphides in ammoniacal thiosulphate systems, ... Hydrometallurgy, 64(2002), ...
اولین نفری باشید که دیدگاهی را ارسال می کنید برای بهينه سازي پارامترهاي عملياتي ليچينگ مخزني کنسانتره طلا شرکت دل آسا لغو پاسخ
Leaching behaviour of sulphides in ammoniacal thiosulphate systems Feng, D; Van Deventer, J.S.J 2002-02-01 00:00:00 Systematic studies have been conducted to understand the leaching behaviour and dissolution mechanisms when common gold-host sulphides such as chalcopyrite, pyrite, arsenopyrite and pyrrhotite are treated by
... leaching of pure gold and pressure oxidized concentrate. ... FENG, D., VAN DEVENTER, J.S.J., 2002, Leaching behaviour of sulphides in ammoniacal thiosulphate ...
Adsorption of Copper from an Ammonia-Thiosulfate Media Using DOWEX 550A Ion Exchange Resin. Full-Text HTML XML Download as PDF ... Vargas, C., Villarroel, A. and Alguacil, F.J. (2002) On the Use of Ammoniacal/ Ammonium Thiosulphate for Gold Extraction from a Concentrate. Hydrometallurgy, 65, 37-42. ... Feng, D. and van Deventer, J.S
Ag 2 S (s) + 4(S 2 O 3) 2 (aq) + 4H + (aq) + O 2 2Ag(S 2 O 3) 2 3 (aq) + S 2+ + 2H 2 O (aq) (9) This is different from the reaction in the presence of , where the reduction of Cu 2+ to Cu + causes the Ag° to oxidize to
Thiosulphate leaching of gold in the presence of orthophosphate and polyphosphate_/__Hydrometallurgy 106 (2011) 3845 ...
Fe 2 O 3 or its hydrated form Fe 2 O 3.xH 2 O (Beckstead and Miller, 1977b; Yin et al., 1995; Forward and Mackiw, 1955; Feng and Van Deventer, 2002) and Fe(OH) 3 (Yin et al., 1995; Warren and Wadsworth, 1984) have been reported to be the surface products of chalcopyrite oxidation. Warren and Wadsworth (1984) studied the electrochemical ...
In this research cyanide-free leaching of pure gold and pressure oxidized refractory gold concentrate by thiosulfate-copper-ammonia solutions were examined. A quartz crystal microbalance (QCM) was used to study gold leaching as a factorial series where the best gold leaching rate (2.987 mg/(cm 2 h)) was achieved with a solution consisting of 0.2
Sulphide minerals partly dissolve in ammoniacal thiosulphate solutions (Qian et al., 1993, Feng and van Deventer, 2002). Oxidative ammoniacal leaching, with ammonia as the lixiviant under mild oxidative leaching conditions, has long been studied for the selective dissolution of sulphide minerals (Forward, 1953, Deng, 1993, Sarveswara Rao and
Se nota también la presencia de cristales de aluminosilicatos en gran proporción, aunque de menor tamaño en comparación con los ensayos anteriores, mostrando cristales de siderita (carbonato de hierro) lo que según Feng y van Deventer (2007) favorece el proceso de recuperación de oro, aumentando un 10% la concentración de este mineral.
Request Article PDF Leaching behaviour of sulphides in ammoniacal thiosulphate systems Citations: 54 Systematic studies have been conducted to understand the leaching behaviour and dissolution mechanisms when common gold-host sulphides such as chalcopyrite, pyrite, arsenopyrite and pyrrhotite are treated by oxidative
%0 Sakarya University Journal of Science Yüksek Basınç Reaktör Sisteminde Küre Kalkopirit Konsantresinden Metallerin Ekstraksiyonu Üzerine Bir Araştırma %A Hasan Arslanoğlu , Hamdi Soner Altundoğan %T Yüksek Basınç Reaktör Sisteminde Küre Kalkopirit Konsantresinden Metallerin Ekstraksiyonu Üzerine Bir Araştırma %D 2013 %J ...
D. Feng , J.S.J. van Deventer Department of Chemical Engineering, University of Melbourne, Victoria, 3010, Australia Available online 27 April 2006 Abstract The effect of pyrite on gold dissolution was investigated in the ammoniacal thiosulphate leaching system using pure gold foils.
1024 D. Feng, J.S.J. van Deventer /Minerals Engineering 24 (2011) 10221024 The role of amino acids in the thiosulphate leaching of gold 1 Introduction 2 Experimental work 3 Results and discussion 4 Conclusions Acknowledgements References
D. Feng , J.S.J. van Deventer Department of Chemical Engineering, University of Melbourne, Victoria, 3010, Australia Available online 27 April 2006 Abstract The effect of pyrite on gold dissolution was investigated in the ammoniacal thiosulphate leaching system using pure gold foils.
Se nota también la presencia de cristales de aluminosilicatos en gran proporción, aunque de menor tamaño en comparación con los ensayos anteriores, mostrando cristales de siderita (carbonato de hierro) lo que según Feng y van Deventer (2007) favorece el proceso de recuperación de oro, aumentando un 10% la concentración de este mineral.
Feng, D, Van Deventer, JSJ (2006) Ammoniacal thiosulphate leaching of gold in the presence of pyrite. Hydrometallurgy 82: 126 132. Google Scholar, Crossref, ISI: Feng, D, Van Deventer, JSJ (2007) Interactions between sulphides and manganese dioxide in thiosulphate leaching of gold ores. Minerals Engineering 20: 533 540.
International Journal of MineraI Processing, 15 (1985) 145--153 145 Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands AMMONIACAL LEACHING FOR EXTRACTION OF NON-FERROUS METALS FROM DEEP-SEA NODULES D. KMETOVA, M. STOFKO and S. KMET Technical University of Kosice, Svermova 9, CS04385, Kosice, Czechoslovakia (Received November 27, 1984) ABSTRACT Kmetov~, D
r 2 s 3 o 6 +na 2 sr 2 s 2 o 3 +na 2 s 2 o 3 (3) The reaction between the thiosulfate in the spent regeneration solution 156 and the added peroxide in the trithionate reactor 164 is shown above in reaction 2.
اولین نفری باشید که دیدگاهی را ارسال می کنید برای بهينه سازي پارامترهاي عملياتي ليچينگ مخزني کنسانتره طلا شرکت دل آسا لغو پاسخ
D. Feng and J.S.J. van Deventer, Thiosulphate leaching of gold in the presence of carboxymethyl cellulose, Mineral Engineering, 24
... H. / Feng, D. / van Deventer, J. S. J. / TMS ... Leaching Chalcopyrite in Ammoniacal Solutions ... Third Phase Formation in TBP Solvent Extraction Systems as a ...
Selective leaching processes for copper, gold, nickel, and cobalt have been investigated because there is an advantage of ammoniacal hydrometallurgy that metal such as copper could be selectively extracted restricting the dissolution of iron or calcium.
The effects of common associated sulfide minerals including pyrite, arsenopyrite, galena and sphalerite on thiosulfate leaching of gold were studied in this work. ... D. Feng and J.S.J. van Deventer, Thiosulphate leaching of gold in the presence of carboxymethyl cellulose, Mineral Engineering, 24 ... Leaching behavior of sulphides
D. Feng , J.S.J. van Deventer Department of Chemical Engineering, University of Melbourne, Victoria, 3010, Australia Available online 27 April 2006 Abstract The effect of pyrite on gold dissolution was investigated in the ammoniacal thiosulphate leaching system using pure gold foils.
The tetrathionate/thiosulfate interconversion is a two-electron process: S4O62 + 2 e 2 S2O32. Both transformations can support bacterial growth since S2O32 provides an energy source, while S4O62 serves as respiratory electron acceptor.
Chemical characterization of hydrous ferric oxides by x-ray ... Ammoniacal thiosulphate leaching of gold in the presence of pyrite. D. Feng, J.S.J. van Deventer.
Thiosulphate Leaching Thiosulphate (S2O32-), a chemical used widely in photography and in the pharmaceutical industries, has also been proposed as a substitute for cyanide. As Yannopoulis 8 explains, gold dissolves slowly in alkaline thiosulphate.
