hydrometallurgy ELSEVIER Hydrometallurgy 42 1996 2733 Leaching of gold and silver from Miller Process dross through noncyanide leachants DSR Murthy a PM Prasad b a National Metallurgical Laboratory CSIR Jamshedpur 831007 India b Department of Metallurgical Engineering Banaras Hindu University Varanasi221005 India Received 27 June 1995 accepted 28 June 1995
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Cyanidation leaching is the primary means of recovery of fine gold and silver In this process solutions of sodium or potassium cyanide are brought into contact with an ore which may or may not have required extensive preparation prior to leaching Gold and silver are dissolved by cyanide in solutions of high pH in the presence of oxygen
Get PriceThe addition of gold or silver to an alkaline sodium cyanide solution will cause the gold and silver to react with the cyanide and dissolve into the solution in a process called cyanidation This process is more frequently referred to as leaching As well as reacting with the precious metals the cyanide will react with iron copper or zinc that may be in the ore In order to leach the
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Get PriceThe development of a hydrometallurgical process to recover manganese and silver from manganese–silver ores is reported Insoluble manganeseIV was reduced to soluble manganeseII in an aqueous medium with calcium sulfide CaS as the reductant and the resultant residue was then leached by a sulfuric acid solution
Get PriceA process is disclosed for the leaching of gold and silver from ores and ore concentrates through intimate contact of the ore or ore concentrate with an aqueous leach solution containing cyanide The leach solution has a pH of 8 to 13 The leaching process takes place in the presence of an oxygenreleasing peroxo compound The separation of the formed cyano complexes of gold and silver takes
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Get PriceProvided is a method for pretreatment of gold ore in order to leach out gold from gold ore containing pyrite with which it is possible to suppress the generation of sulfide dioxide and to improve the leaching rate of gold A method for pretreatment in order to recover gold contained in gold ore containing pyrite FeS 2 by wet treatment the method containing a step in which pyrite in gold
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