alkaline oand idation refractory gold

alkaline oand idation refractory gold

Jan 01 2004 · The alkaline oxidation of refractory gold concentrates containing arsenopyrite and pyrite at ambient temperatures and pressures has been found to be accompanied by the simultaneous dissolution of gold without the addition of cyanide A detailed study has been made of the kinetics of the oxidation of the pure minerals and of several concentrates

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  • Oxidation of refractory gold concentrates and simultaneous

    Oxidation of refractory gold concentrates and simultaneous

    The oxidation of refractory gold concentrates containing arsenopyrite and pyrite and the simultaneous dissolution of gold in aerated alkaline solutions at ambient temperatures and pressures without the addition of cyanide has been studied It involves the following aspects the chemistry of the oxidation of pure arsenopyrite and pyrite minerals in aerated alkaline solutions the kinetics of

  • Alkaline Oxidative Leaching of GoldBearing

    Alkaline Oxidative Leaching of GoldBearing

    emissions and is suitable for small gold producers Demopoulos and Papangelakis have reviewed the recent development of hydrometallurgical oxidation processes and their possible applications to treat refractory gold ores 5 These processes can be classified as pressure oxidation 6 biological oxidation 7 and chemical oxidation 8

  • OXIDATION OF REFRACTORY GOLD CONCENTRATES

    OXIDATION OF REFRACTORY GOLD CONCENTRATES

    ammonia The leaching experiments also have shown that gold may dissolve in alkaline thioarsenite solutions which provides a possible new process option for the leaching of gold The oxidation of refractory arsenical gold concentrates in aerated alkaline solutions results in the formation of thiosulfate arsenate and sulfate as well as the

  • Mineralogy and Pretreatment of a Refractory Gold Deposit

    Mineralogy and Pretreatment of a Refractory Gold Deposit

    The technological mineralogy of a gold deposit located in NorthWestern province of Zambia was carried out by using Xray fluorescence spectroscopy XRF Xray diffraction spectroscopy XRD and scanning electron microscope SEM The results showed that gold was highly dispersed in goldbearing minerals such as pyrite arsenopyrite and some gangues in the form of natural gold and electrum

  • Process For The Treatment Of Refractory Gold Concentrates

    Process For The Treatment Of Refractory Gold Concentrates

    Fates and 83 of gold is synchro dissoluted by thiosulfate selfgenerated during pretreatmentince the carbona ceous matter in concentrate possesses a strong capability of preg robbing the cyanidation process is not suitable for the extraction of gold after the treatment of refractory gold alkaline oand idation refractory goldThe treatment

  • Barrick Gold Autoclaving Processes AusIMM

    Barrick Gold Autoclaving Processes AusIMM

    This paper reviews the various processes successfully in operation to treat refractory gold ores and describes in detail the alkaline pressure oxidation circuit operating at the Barrick Mercur Mine Utah USA on car bonaceoussulphide refractory ore and the acidic pressure oxidation circuit operating at the Barrick Goldstrike Mine near Carlin Nevada USA on sulphide refractory

  • Mining Project Presure Of Oxidation Gold Concentrate China

    Mining Project Presure Of Oxidation Gold Concentrate China

    alkaline pressure oand idation of gold concentrates OXIDATION OF REFRACTORY GOLD CONCENTRATES AND SIMULTANEOUS DISSOLUTION OF GOLD IN AERATED ALKALINE SOLUTIONS By Suchun Zhang B Eng Appl Chem Tsinghua University Beijing China Get Price Alkaline Pressure Oxidation of a GoldBearing pressure oxidation plant for sale iresbiblioteca

  • Extraction of Gold from a LowGrade Double Refractory Gold

    Extraction of Gold from a LowGrade Double Refractory Gold

    The concentrate from the flotation procedure was processed using different preoxidation methods A concentrate containing 3408gt of gold with the gold recovery ratio of 8120 was obtained by flotation After roasting microwave heating or alkaline pressure oxidation the gold cyanidation ratio reached 8237 8126 and 7109 respectively

  • PDF Pressure oxidation of double refractory gold

    PDF Pressure oxidation of double refractory gold

    Santa Fe Pacific Gold Corp conducted pressureoxidation pilot plant studies on refractory carbonaceous gold ores from the Twin Creeks Mine in Nevada The tests were conducted at

  • Alkaline and acidic autoclaving of refractory gold ores

    Alkaline and acidic autoclaving of refractory gold ores

    American Barrick operates two autoclaves for the processing of refractory gold ores Because of the mineralogy of the ores one autoclave is alkaline and the other acidic The pH of operation has a significant effect on materials of construction as well as capital and operating costs The following summary concentrates on the practical and economic aspects of such operations

  • The Albion Process for Refractory Gold

    The Albion Process for Refractory Gold

    Where the main gold bearing refractory mineral in the concentrate is pyrite the oxidative leach is typically carried out under alkaline conditions The leach conditions are set to ensure the formation of goethite as the major iron reaction product The alkaline leach conditions accelerate the rate of

  • The reasons of gold refractory Gold ore classification

    The reasons of gold refractory Gold ore classification

    Nov 28 2016 · The reason of the gold mineral refractory There are so many types of reasons that caused the difficulty of gold ore processing including physical element chemical element and mineralogical element

  • Oxidation of refractory gold concentrates and simultaneous

    Oxidation of refractory gold concentrates and simultaneous

    The leaching experiments also have shown that gold may dissolve in alkaline thioarsenite solutions which provides a possible new process option for the leaching of goldud ud The oxidation of refractory arsenical gold concentrates in aerated alkaline solutions results in the formation of thiosulfate arsenate and sulfate as well as the

  • alkaline pressure oand idation of gold concentrates

    alkaline pressure oand idation of gold concentrates

    alkaline pressure oand idation of gold concentrates With the Desert Fox Gold Panning Machine you can process your concentrates much faster and your gold recovery and efficiency will improve by a factor of 50alkaline pressure oand idation of gold concentrates gold mining africas sites manufactures industrials Others link

  • Review of gold extraction from ores ScienceDirect

    Review of gold extraction from ores ScienceDirect

    These options include ultrafine grinding acid and alkaline pressure oxidation and a variety of chemical pretreatments such as Activox process HMC process and Electrolytic oxidation process In Australia the two preeminent options for refractory gold ore pretreatment are roasting and biooxidation and this development is reported

  • oand idation of alcohols by mno with ball mill

    oand idation of alcohols by mno with ball mill

    oand idation of alcohols by mno with ball mill oxidation of alcohols by mno2 with ball mill oxidation of alcohols by mno2 with ball mill HFC Refrigerants 55 HST Hydraulic Cone CrusherHST series hydraulic cone crusher is combined with technology such as machinery hydraulic pressure electricity automation intelligent control etc representing the most advanced crusher technology in

  • Refractory goldbearing ores a review of treatment

    Refractory goldbearing ores a review of treatment

    Jan 01 1994 · Hydrometallurgy 34 1994 383395 383 Elsevier Science BV Amsterdam Refractory goldbearing ores a review of treatment methods and recent advances in biotechnological techniques Nieves Iglesias and Francisco Carranza Chemical Engineering Department University of Sevilla 41012 Sevilla Spain Received January 10 1993 revised version accepted March 16 1993 ABSTRACT

  • Neutral and alkaline bioheap oxidation of refractory gold

    Neutral and alkaline bioheap oxidation of refractory gold

    Neutral and alkaline bioheap oxidation of refractory gold ores with adaptive moderatethermophilic and mesophilic microorganisms The project has been defined to address the growing concerns of the mining industry towards sustainable copper production with low cost and environmentally friendly process option The current processes for copper

  • Gold Extraction Process And Explanation

    Gold Extraction Process And Explanation

    Gold Extraction Process Start by reducing the size of gold to smaller Melt gold pour gold while melting through a 2 mm sieve into the water Reducing the size of gold to smaller Will help in the process of aqua regia to make gold into the solution more quickly aqua regia is composed of 2 chemical substances 1 nitric acid 3 hydrochloric acid mixed together

  • Gold Sulphide Ore Oxidation by Alkaline Pressure

    Gold Sulphide Ore Oxidation by Alkaline Pressure

    Table of ContentsExperimental ProceduresResults and DiscussionProposed Process Flowsheet The US Bureau of Mines developed an alkaline oxidative pretreatment to increase the recovery of gold from refractory sulfide ores containing arsenopyrite FeAsS andor pyrite FeS2 Pretreatment of a low grade ore containing 04 FeAsS 35 FeS2 and 274gmt Au with 12M NaOH 40 psig 02 100° C

  • US5071477A Process for recovery of gold from refractory

    US5071477A Process for recovery of gold from refractory

    The present invention is directed to an improvement in a process for the recovery of gold from refractory sulfidic auriferous ores which comprises oxidizing a slurry of ore with oxygen gas under pressure in the presence of sulfuric acid neutralizing the oxidized slurry cyanidizing the neutralized slurry to leach gold therefrom and recovering gold from the resultant leachate

  • alkaline pressure oand idation of gold concentrates

    alkaline pressure oand idation of gold concentrates

    alkaline pressure oand idation of gold concentrates With the Desert Fox Gold Panning Machine you can process your concentrates much faster and your gold recovery and efficiency will improve by a factor of 50alkaline pressure oand idation of gold concentrates gold mining africas sites manufactures industrials Others link

  • oand idation of alcohols by mno with ball mill

    oand idation of alcohols by mno with ball mill

    oand idation of alcohols by mno with ball mill oxidation of alcohols by mno2 with ball mill oxidation of alcohols by mno2 with ball mill HFC Refrigerants 55 HST Hydraulic Cone CrusherHST series hydraulic cone crusher is combined with technology such as machinery hydraulic pressure electricity automation intelligent control etc representing the most advanced crusher technology in

  • Pretreatment Process on Refractory Gold Ores with As

    Pretreatment Process on Refractory Gold Ores with As

    1 Introduction Gold ores are considered refractory if gold extractions from a conventional cyanidation process are less than 80 even after fine grinding 1 Arsenicbearing refractory gold ore has stones extremely difficult to deal with In the stones gold is locked up in arsenic mineral matrix as the form of microscopic or submicroscopic lattice

  • US5536297A Gold recovery from refractory carbonaceous

    US5536297A Gold recovery from refractory carbonaceous

    A process for recovering gold in which an ore slurry of refractory sulfidic and refractory carbonaceous ore having pregrobbing characteristics due to the presence of organic carbon is subjected to pressure oxidation in an autoclave The oxidized ore slurry is mixed with a thiosulfate salt lixiviant which mixture is maintained at a pH between 7 and 87 while the slurry is agitated in a

  • Refractory Gold Ore Gold Kiln Hot In Russia

    Refractory Gold Ore Gold Kiln Hot In Russia

    High Pressure O Idation Of Refractory Gold Minerals Refractory ore resists normal processing methods as the high sulfide minerals trap gold refractory gold PRESSURE Get Price High Pressure O Idation Of Refractory Gold Minerals high pressure oxidation gold Raymond high pressure oxidation of refractory gold minerals 14 Jun 2012 Gulin supply Mining and construction equipment for mineral

  • Shanghai Shabani Crushers

    Shanghai Shabani Crushers

    Alkaline Oand Idation Refractory Gold A Hrefjavascript Grapa Para Faja Transportadora En Peru Ball Screw Kit Bridgeport Milling Machine Was A Watermill Used For Gold Mining Protein Foaming Agent Formula Mp3 India Koi Milly Gaya Py Cone Crusher Mobile Jaw Crusher Py Cone Crusher Forkliftmanitou Forklift Crushers Oand Idation Of Alcohols By

  • Improvement of Gold Leaching from a Refractory Gold

    Improvement of Gold Leaching from a Refractory Gold

    A total gold extraction of 702 could only be reached via direct cyanidation from a refractory As S and Cbearing gold concentrate calcine and the gold extraction varied noticeably with different size fractions The reasons for unsatisfactory gold extraction from the calcine were studied through analyses of chemical composition chemical phase and SEMEDS of different sizes of particles

  • ALTA Gold 2012 EDoc Albion Process

    ALTA Gold 2012 EDoc Albion Process

    Refractory gold ores are those that do not yield high gold recoveries in conventional cyanideleaching circuits even when the ore is finely ground determined by the reaction conditions which range from mild in alkaline leaching and biological leaching to the aggressive conditions found in pressure oxidation The gold and sulphur sulphides

  • Gold Extraction Process And Explanation

    Gold Extraction Process And Explanation

    Gold Extraction Process Start by reducing the size of gold to smaller Melt gold pour gold while melting through a 2 mm sieve into the water Reducing the size of gold to smaller Will help in the process of aqua regia to make gold into the solution more quickly aqua regia is composed of 2 chemical substances 1 nitric acid 3 hydrochloric acid mixed together

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