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Aug 03 2010nbsp018332Abstract The leaching of copper from the tailings of Baifang Copper Mine in Hunan province in China by aqueous ammoniaammonium chloride solutions has been studied The tailings belong to a lowgrade and highalkaline copper ore The effect of leaching time the concentration of ammonia solidliquid ratio and temperature were investigated
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Aug 03 2010nbsp018332Abstract The leaching of copper from the tailings of Baifang Copper Mine in Hunan province in China by aqueous ammoniaammonium chloride solutions has been studied The tailings belong to a lowgrade and highalkaline copper ore The effect of leaching time the concentration of ammonia solidliquid ratio and temperature were investigated
Get DetailKennecotts Ammonia Leaching Plant was built in 1916 and was used to process the lower grade copper from the mines A chemist named ET Stannard invented this advanced mining technology and later became CEO of the Kennecott Corporation In 1923 a floatation plant was added to the building where the quotfinesquot ore less than 2 mm in diameter
Get DetailJun 24 2004nbsp018332In this study the leaching kinetics of malachite CuCO3183CuOH2 an oxidized copper ore was investigated in water saturated with ammonia gas In the experiments the ammonia concentration of the solution the particle size of the ore the temperature the stirring speed and the solidtoliquid ratio were chosen as parameters It was determined that the leaching rate of malachite
Get Detailammonia leaching of oxidized copper ores as the dissolution reactions happen at mildly acidic or basic conditions some metal impurities which pass into the solution during the dissolution of ore precipitate because of the high pH of the solution Besides ammonia forms stable complexes with copper
Get DetailThe application of ammonium thiosulfate for the treatment of coppergold ores has been investigated Leaching studies were conducted with copper minerals copper minerals with gold addition to solution and coppergold samples of different copper and gold grades The behaviour of thiosulfate tetrathionate and sulfate in solution was studied using ion chromatography The copper sulfide minerals
Get Detailammonia leaching without oxidants Therefore it makes a focus that how to extract bornite in ammoniacal solution Persulfate is known to be a strong oxidant in the basic solutions and has been used as a leaching agent for the recovery of metal in alkaline solutions 2021 The dissolution of lowgrade copper ore in ammonia
Get DetailK SARVESWARARAO The Role of Solids Characterisation Techniques in the Evaluation of Ammonia Leaching Behaviour of Complex Sulphides Mineral Processing and Extractive Metallurgy Review 10108008827500008547439 20 46 409445 2000
Get DetailThe hydrometallurgical copper extraction processes of the present teachings generally including two steps a conditioning or activating step using low concentrations of ammonia and ammonium in an aqueous solution and an acid leaching step The processes of the present teachings can be performed at low temperature for example at ambient temperature and at atmospheric pressure
Get Detailores with ammoniacyanide and their plant control and operation has been published by Muir 2011 The application of cyanideammonia system to leach gold over copper from oxidised ores has been tested successfully using different goldcopper ores Drok and Ritchie 1997 La Brooy et al 1991 Muir et al 1989 However this system in the
Get DetailNew Copper Products Copper powder technology yPotential replacement for cathode to rod ySpecialty copper powders Copper powder process reduces or eliminates the following yManual harvesting of cathodes yCell cleaning yStainless blank repairs and replacement yStripping machines ySlippery or brittle cathodes Focused on reducing costs and improving
Get DetailOct 01 2005nbsp018332To achieve this objective wood blocks were treated with copper monoethanolamine CuMEA containing various concentrations of elemental copper and ammonia A laboratory accelerated leaching test was carried out on the treated cubes to determine the copper leaching of each treatment Material and methods Treating solutions
Get DetailThe ammonia leaching tests were carried out to recover valuable metals from alloy obtained from smelting reduction process of mobile phone printed circuit boards Leaching factors such as kinds of salt ammonia concentration and the interaction of metals which are components of PCB were investigated to improve the leaching efficiency
Get DetailAn improved process for obtaining copper from a copper sulfide in which the copper sulfide is treated with oxygen and an aqueous leaching solution of ammonium carbonate to form a leach liquor which contains ammonia complexes of copper sulfate and copper carbonate the leach liquor is heated to form gaseous ammonia and carbon dioxide the leach liquor is treated with a strongly alkaline
Get DetailMar 26 2008nbsp018332EhpH diagrams of various metalammoniawater systems are presented Also presented is a comprehensive literature survey on the leaching behavior of metals in ammoniacal solutions The metals considered in this paper are copper cobalt nickel zinc cadmium silver gold and palladium
Get DetailJul 18 2013nbsp018332The general feasibility of ammoniacal percolation leaching of copper sulphide ores has been demonstrated The rates are comparable to those of conventional ferric sulphatesulphuric acid systems but without the attendant problems of carbonate or iron dissolution For the ore column heights studied the copper leaching rate increased approximately as the square root of the total NH 3
Get Detailof copper in their investigation on the oxidative ammoniaammonium sulphate leaching of a complex synthetic matte CuNiFeCo Chang and Liu studies on the feasibility of copper leaching from industrial sludge using ammonia solutions managed to recover 94 of copper
Get Detailthiosulfate leaching of natural acanthite ore in copperammoniaammonium sulfate medium by yueh yves lai bsc university of alberta 2014 a thesis submitted in partial fulfillment of the requirements for the degree of master of applied science in the faculty of
Get DetailMay 01 2002nbsp018332Oxidative ammonia leaching of pure zinc sulfide in the presence of lead compounds Metallurgical Transactions B 1990 21 2 402404 DOI 101007BF02664208 J Sedzimir M Bujavska Kinetics of leaching of copper metal in copperIIammonium sulphate solutions as determined by the rotating disc method
Get DetailAmmonia 10 October 25th 2004 Factors Affecting Process Selection Copper Pressure Leaching
Get Detailcompatible with the copper leaching process because it did not extract copper below pH36 Technically this problem could be solved by neutralizing the acid leach liquor or by leaching oxide copper with ammonia but neither solution was economical a molecule that extracted copper well from typical dump leach liquors pH 18 had to be built The
Get Detailammonia in the industrial leaching plant is described In the plant it was found that the extraction of copper was halved by the use of ammonia thus leading to significant reductions in the amount of cyanide consumed in the fullscale leaching system KEYWORDS Goldcopper ore treatment Gedabek mine Azerbaijan Resininpulp process
Get DetailLeaching is the first prerequisite of any hydrometallurgical process Solutions containing ammonia may allow for selective leaching of the copper from the ore In this study the leaching kinetics of malachite which is an oxidized copper ore in ammonium nitrate solutions was examined
Get DetailCopper recovery from conglomeratetype native copper ore by ammonia leaching solvent extraction and electrowinning Washington Dept of the Interior Bureau of Mines 1979 OCoLC5112589
Get DetailThe ammoniathiosulfate system with copper offers high gold leaching rates compared to the cyanide system because the reaction is catalyzed by cupric ions 1 23 The main reaction in the gold leaching in a thiosulfateammonia media is the following 1 With the oxidation reactions of Cu to Cu 2 through the following equilibrium 2
Get DetailA description of the agitation leach plant used for treating goldcopper ores at Anglo Asian Miningamp39s Gedabek mine in Azerbaijan is given The plant employs a unique resininpulp system for gold recovery The integration of the agitation leach
Get DetailCopper smelter slag can be considered as an important source for using in the copper hydrometallurgy Ammonia leaching seems to be attractive for processing copper slag Under the influence of ammonia copper which is part of the minerals of copper forms soluble ammonia complexes while iron precipitates as insoluble compounds
Get DetailThe leaching of oxide copper ore containing malachite which is the unique copper mineral in the ore by aqueous ammonia solution has been studied The effect of leaching time ammonium hydroxide and ammonium carbonate concentration pH NH 3 NH 4 ratio stirring speed solidliquid ratio particle size and temperature were investigated
Get DetailAlthough ammonia leaching of copper from slags has been reported generally as a part of copper slag utilization methods but no detailed studies have been reported in the literature In this research we tried to investigate the effect of different parameters on ammonia leaching of copper from copper smelting slag by identifying different copperbearing phases and following them during
Get DetailJun 18 2020nbsp018332Characterization and kinetic study on ammonia leaching of complex copper ore Transactions of Nonferrous Metals Society of China 24 15871595 2014 CAS Article Google Scholar
Get Detailreported the selective leaching of copper from motor scraps using cupric ammine solutions12 Zhou et al studied the removal of copper from ferrous scrap by an ammonia leaching method34 In these studies CuI ions were obtained under an air or oxygen atmosphere as the reaction product and then metallic copper would be electrowon from
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