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autoclave use in gold ore dressing

Slurry from the grinding circuit at approximately 35 solids and 8085 passing 135 mm is pumped to three thickeners Thickener underflow at approximately 54 ww solids is pumped to a train of four acidulation tanks Sulfuric acid is added to the slurry to destroy sufficient carbonate prior to entering the autoclave circuit Process air is also injected into the acidulation tanks to aid

  • Autoclave Circuit  Gold
    Autoclave Circuit Gold

    Slurry from the grinding circuit at approximately 35 solids and 8085 passing 135 mm is pumped to three thickeners Thickener underflow at approximately 54 ww solids is pumped to a train of four acidulation tanks Sulfuric acid is added to the slurry to destroy sufficient carbonate prior to entering the autoclave circuit Process air is also injected into the acidulation tanks to aid

  • Autoclave oxidation processing of refractory gold
    Autoclave oxidation processing of refractory gold

    In conditions simulating operation of autoclave equipment oxidation of pyrite gold concentrates 3 aqueous solution of H2SO4 including and in the presence of chloride ion at 130 C and an

  • 2 new major finds may extend Nevada’s gold boom for years
    2 new major finds may extend Nevada’s gold boom for years

    Mar 05 2020 · Grinding steel balls used to extract gold and other precious metals in ore mineral processing are seen at the Goldstrike autoclave at Nevada Gold Mines Carlin operation on Thursday Oct 24

  • Pressure Oxidation  SGS
    Pressure Oxidation SGS

    Pressure Oxidation Pressure oxidation POX high pressure oxidation HiPOX and ACTIVOX autoclave leaching are viable industrystandard technologies used to recover gold and other accessory metals The process is particularly well suited for treating refractory gold ores which give low recovery when directly leached with cyanide

  • Autoclave Technology  Hatch
    Autoclave Technology Hatch

    Some ores require a hightemperature highpressure pretreatment process before leaching in order to improve metal recovery from the complex ore Autoclaves are a preferred component of the process for many largescale sulfidic refractory bodies including such processes as AuAg pressure oxidation CuAgAu pressure oxidation NiCo pressure leach NiCoCu concentrate pressure oxidative leach and

  • Goldstrike TCM Leaching  Ausenco
    Goldstrike TCM Leaching Ausenco

    Goldstrike is Barrick’s largest and most productive mining operation with gold production of more than 40 million ounces since 1987 It is located on the Carlin Trend approximately 40 km northwest of Elko Nevada USA with the objective of improving the gold recovery process for double refractory ores processed in the Autoclave

  • TECHNOLOGY FOR PROCESSING OF REFRACTORY GOLD
    TECHNOLOGY FOR PROCESSING OF REFRACTORY GOLD

    Autoclave oxidation bacterial and chemical liberation roasting acid oxygen processes atmospheric oxidation prior to cyanidation are applied to process refractory sulphide concentrates It is obvious that the processes with the maximum effect regarding gold recovery are those in which complete

  • Gold processing  Mining and concentrating  Britannica
    Gold processing Mining and concentrating Britannica

    Oxidation can also be accomplished by the use of highpressure reactors called autoclaves in which the minerals in an aqueous slurry are treated at high temperature and pressure with oxygenbearing gases After oxidation is complete cyanidation as described above is employed to solubilize and extract the gold

  • Mineral processing  metallurgy  Britannica
    Mineral processing metallurgy Britannica

    Mineral processing art of treating crude ores and mineral products in order to separate the valuable minerals from the waste rock or gangue It is the first process that most ores undergo after mining in order to provide a more concentrated material for the procedures of extractive primary operations are comminution and concentration but there are other important operations

  • Pressure Oxidation  Caldera Engineering
    Pressure Oxidation Caldera Engineering

    Overview Pressure Oxidation POX is a process used to extract gold copper zinc molybdenum and uranium from refractory ore bodies The POX process utilizes elevated temperatures roughly 230 degrees Celsius elevated pressures roughly 35 bar or 510 psi and oxygen to liberate the minerals from refractory ores

  • DoubleRefractory Carbonaceous Sulfidic Gold Ores
    DoubleRefractory Carbonaceous Sulfidic Gold Ores

    Jan 01 2016 · Gold in refractory sulfide ores occurs as fine inclusions or in solid solution typically within pyrite marcasite and arsenopyrite grains In this type of ore because the gold is encapsulated the interaction with cyanide to form the soluble metal complex is inhibited Marsden and House 2006 La Brooy et al 1994

  • Improved recovery of a lowgrade refractory gold ore using
    Improved recovery of a lowgrade refractory gold ore using

    Jul 01 2014 · In this work different flotation–preoxidation–cyanidation methods are considered for treating a lowgrade refractory gold ore On the one hand the results of selective flotation show that 22 and 311 of total Sb and As respectively remained in the final tailings and only about 28 of the total Au remained for further cyanidation processes

  • Refractory Gold  SGS
    Refractory Gold SGS

    The effect of pregrobbing can be partially overcome by the use of CIL rather than CIP provided the activated carbon used in CIL is more “active” than the carbonaceous matter in the ore The rate of equilibration of gold between the carbonaceous matter and the activated carbon can be very slow however and this approach is seldom

  • Pressure Oxidation  SGS
    Pressure Oxidation SGS

    Pressure oxidation POX high pressure oxidation HiPOX and ACTIVOX autoclave leaching are viable industrystandard technologies used to recover gold and other accessory metals Read more The process is particularly well suited for treating refractory gold ores which give low recovery when directly leached with cyanide

  • Goldstrike TCM Leaching  Ausenco
    Goldstrike TCM Leaching Ausenco

    Goldstrike is Barrick’s largest and most productive mining operation with gold production of more than 40 million ounces since 1987 It is located on the Carlin Trend approximately 40 km northwest of Elko Nevada USA with the objective of improving the gold recovery process for double refractory ores processed in the Autoclave

  • TECHNOLOGY FOR PROCESSING OF REFRACTORY GOLD
    TECHNOLOGY FOR PROCESSING OF REFRACTORY GOLD

    disseminated gold from the flotation concentrate resulted from processing of a refractory ore of one of Russian gold deposits Concentrate description Gold grade of the head flotation concentrate was 296 gt The concentrate size was 80 80 um Mineral composition of the concentrate comprises 17 of rockforming minerals 59 of pyrite and 24

  • Gold Ore Roasting Techniques
    Gold Ore Roasting Techniques

    Metallurgical ContentRecover Gold by Roasting Pyrite OreRoasting of flotation concentratesRoasting Arsenopyrite Ore for GoldRoasting and leaching a sulphide concentrateRoasting and Processing Sulphotelluride ore to recover goldFluoSolids Roasting SystemRoasting with a FluoSolids reactorWhy use Salts in the roasting processROASTING WITH SODA ASHGOLD LOSSES IN ROASTINGCalcination

  • GOLD AND SILVER
    GOLD AND SILVER

    Nevada Mines Operations Newmont Gold Company Elko and Eureka NV Gold ore Gold Strike Barrick Mercur Gold Mines Inc Eureka NV Gold ore autoclave technology totally or in part to beneficiate sulfide or carbonaceous gold ores 7 Two common types of pads used in gold heap leaching include permanent heap construction on a pad from

  • Extracting Gold  HowStuffWorks
    Extracting Gold HowStuffWorks

    Removing the goldbearing rock from the ground is just the first step To isolate pure gold mining companies use a complex extraction process The first step in this process is breaking down large chunks of rock into smaller pieces At a mill large machines known as crushers reduce the ore to pieces no larger than road gravel

  • The Mining Process  Newmont Corporation  About Us
    The Mining Process Newmont Corporation About Us

    An alternative to an autoclave is a roaster a very high temperature oven that is often used instead of an autoclave if the ore to process contains a large amount of organic carbon Roasting uses heat and air to burn the organic carbon into fuel and to burn the sulfur off ore which we heat to 932 to 1202 degrees F

  • Cyanidefree gold processing technology hits the market
    Cyanidefree gold processing technology hits the market

    Jun 20 2019 · The results were highlighted by hole GS2075 which hit 1152 metres of 074 gt goldequivalent 057 gt gold 175 gt silver and 01 copper

  • High Pressure Acid Leach  Caldera Engineering
    High Pressure Acid Leach Caldera Engineering

    It has subsequently increased in use since that time How It Works The HPAL process works as follows ore is mined and crushed to create a fine material These fines are mixed with water to create a slurry which is then preheated This hot slurry is pumped into an autoclave a giant pressure cooker of sorts where acid is added

  • Gold Ore Processing Volume 15  2nd Edition
    Gold Ore Processing Volume 15 2nd Edition

    Gold Ore Processing Project Development and Operations Second Edition brings together all the technical aspects relevant to modern gold ore processing offering a practical perspective that is vital to the successful and responsible development operation and closure of any gold ore processing completely updated edition features coverage of established newly implemented

  • Autoclave Circuit  Gold
    Autoclave Circuit Gold

    Slurry from the grinding circuit at approximately 35 solids and 8085 passing 135 mm is pumped to three thickeners Thickener underflow at approximately 54 ww solids is pumped to a train of four acidulation tanks Sulfuric acid is added to the slurry to destroy sufficient carbonate prior to entering the autoclave circuit Process air is also injected into the acidulation tanks to aid

  • Autoclave oxidation processing of refractory gold
    Autoclave oxidation processing of refractory gold

    In conditions simulating operation of autoclave equipment oxidation of pyrite gold concentrates 3 aqueous solution of H2SO4 including and in the presence of chloride ion at 130 C and an

  • 2 new major finds may extend Nevada’s gold boom for years
    2 new major finds may extend Nevada’s gold boom for years

    Mar 05 2020 · Grinding steel balls used to extract gold and other precious metals in ore mineral processing are seen at the Goldstrike autoclave at Nevada Gold Mines Carlin operation on Thursday Oct 24

  • The Mining Process  Newmont Corporation  About Us
    The Mining Process Newmont Corporation About Us

    Newmont treats refractory ore in two ways by using an autoclave or a roaster An autoclave is used before leaching occurs First the slurry is heated and fed into an autoclave where highpressure steam water and oxygen are applied to oxidize the sulfide material by a chemical reaction

  • Pressure Oxidation  SGS
    Pressure Oxidation SGS

    Pressure Oxidation Pressure oxidation POX high pressure oxidation HiPOX and ACTIVOX autoclave leaching are viable industrystandard technologies used to recover gold and other accessory metals The process is particularly well suited for treating refractory gold ores which give low recovery when directly leached with cyanide

  • Autoclave Technology  Hatch
    Autoclave Technology Hatch

    Some ores require a hightemperature highpressure pretreatment process before leaching in order to improve metal recovery from the complex ore Autoclaves are a preferred component of the process for many largescale sulfidic refractory bodies including such processes as AuAg pressure oxidation CuAgAu pressure oxidation NiCo pressure leach NiCoCu concentrate pressure oxidative leach and

  • Refractory Gold  SGS
    Refractory Gold SGS

    The effect of pregrobbing can be partially overcome by the use of CIL rather than CIP provided the activated carbon used in CIL is more “active” than the carbonaceous matter in the ore The rate of equilibration of gold between the carbonaceous matter and the activated carbon can be very slow however and this approach is seldom

  • Gold Ore Roasting Techniques
    Gold Ore Roasting Techniques

    Metallurgical ContentRecover Gold by Roasting Pyrite OreRoasting of flotation concentratesRoasting Arsenopyrite Ore for GoldRoasting and leaching a sulphide concentrateRoasting and Processing Sulphotelluride ore to recover goldFluoSolids Roasting SystemRoasting with a FluoSolids reactorWhy use Salts in the roasting processROASTING WITH SODA ASHGOLD LOSSES IN ROASTINGCalcination

  • Mineral processing  metallurgy  Britannica
    Mineral processing metallurgy Britannica

    Mineral processing art of treating crude ores and mineral products in order to separate the valuable minerals from the waste rock or gangue It is the first process that most ores undergo after mining in order to provide a more concentrated material for the procedures of extractive primary operations are comminution and concentration but there are other important operations

  • Pressure Oxidation  Caldera Engineering
    Pressure Oxidation Caldera Engineering

    Overview Pressure Oxidation POX is a process used to extract gold copper zinc molybdenum and uranium from refractory ore bodies The POX process utilizes elevated temperatures roughly 230 degrees Celsius elevated pressures roughly 35 bar or 510 psi and oxygen to liberate the minerals from refractory ores

  • DoubleRefractory Carbonaceous Sulfidic Gold Ores
    DoubleRefractory Carbonaceous Sulfidic Gold Ores

    Jan 01 2016 · Gold in refractory sulfide ores occurs as fine inclusions or in solid solution typically within pyrite marcasite and arsenopyrite grains In this type of ore because the gold is encapsulated the interaction with cyanide to form the soluble metal complex is inhibited Marsden and House 2006 La Brooy et al 1994

  • Improved recovery of a lowgrade refractory gold ore using
    Improved recovery of a lowgrade refractory gold ore using

    Jul 01 2014 · In this work different flotation–preoxidation–cyanidation methods are considered for treating a lowgrade refractory gold ore On the one hand the results of selective flotation show that 22 and 311 of total Sb and As respectively remained in the final tailings and only about 28 of the total Au remained for further cyanidation processes

  • Refractory Gold  SGS
    Refractory Gold SGS

    The effect of pregrobbing can be partially overcome by the use of CIL rather than CIP provided the activated carbon used in CIL is more “active” than the carbonaceous matter in the ore The rate of equilibration of gold between the carbonaceous matter and the activated carbon can be very slow however and this approach is seldom

  • Pressure Oxidation  SGS
    Pressure Oxidation SGS

    Pressure oxidation POX high pressure oxidation HiPOX and ACTIVOX autoclave leaching are viable industrystandard technologies used to recover gold and other accessory metals Read more The process is particularly well suited for treating refractory gold ores which give low recovery when directly leached with cyanide

  • Goldstrike TCM Leaching  Ausenco
    Goldstrike TCM Leaching Ausenco

    Goldstrike is Barrick’s largest and most productive mining operation with gold production of more than 40 million ounces since 1987 It is located on the Carlin Trend approximately 40 km northwest of Elko Nevada USA with the objective of improving the gold recovery process for double refractory ores processed in the Autoclave

  • TECHNOLOGY FOR PROCESSING OF REFRACTORY GOLD
    TECHNOLOGY FOR PROCESSING OF REFRACTORY GOLD

    disseminated gold from the flotation concentrate resulted from processing of a refractory ore of one of Russian gold deposits Concentrate description Gold grade of the head flotation concentrate was 296 gt The concentrate size was 80 80 um Mineral composition of the concentrate comprises 17 of rockforming minerals 59 of pyrite and 24

  • Gold Ore Roasting Techniques
    Gold Ore Roasting Techniques

    Metallurgical ContentRecover Gold by Roasting Pyrite OreRoasting of flotation concentratesRoasting Arsenopyrite Ore for GoldRoasting and leaching a sulphide concentrateRoasting and Processing Sulphotelluride ore to recover goldFluoSolids Roasting SystemRoasting with a FluoSolids reactorWhy use Salts in the roasting processROASTING WITH SODA ASHGOLD LOSSES IN ROASTINGCalcination

  • GOLD AND SILVER
    GOLD AND SILVER

    Nevada Mines Operations Newmont Gold Company Elko and Eureka NV Gold ore Gold Strike Barrick Mercur Gold Mines Inc Eureka NV Gold ore autoclave technology totally or in part to beneficiate sulfide or carbonaceous gold ores 7 Two common types of pads used in gold heap leaching include permanent heap construction on a pad from

  • Extracting Gold  HowStuffWorks
    Extracting Gold HowStuffWorks

    Removing the goldbearing rock from the ground is just the first step To isolate pure gold mining companies use a complex extraction process The first step in this process is breaking down large chunks of rock into smaller pieces At a mill large machines known as crushers reduce the ore to pieces no larger than road gravel

  • The Mining Process  Newmont Corporation  About Us
    The Mining Process Newmont Corporation About Us

    An alternative to an autoclave is a roaster a very high temperature oven that is often used instead of an autoclave if the ore to process contains a large amount of organic carbon Roasting uses heat and air to burn the organic carbon into fuel and to burn the sulfur off ore which we heat to 932 to 1202 degrees F

  • Cyanidefree gold processing technology hits the market
    Cyanidefree gold processing technology hits the market

    Jun 20 2019 · The results were highlighted by hole GS2075 which hit 1152 metres of 074 gt goldequivalent 057 gt gold 175 gt silver and 01 copper

  • High Pressure Acid Leach  Caldera Engineering
    High Pressure Acid Leach Caldera Engineering

    It has subsequently increased in use since that time How It Works The HPAL process works as follows ore is mined and crushed to create a fine material These fines are mixed with water to create a slurry which is then preheated This hot slurry is pumped into an autoclave a giant pressure cooker of sorts where acid is added

  • Gold Ore Processing Volume 15  2nd Edition
    Gold Ore Processing Volume 15 2nd Edition

    Gold Ore Processing Project Development and Operations Second Edition brings together all the technical aspects relevant to modern gold ore processing offering a practical perspective that is vital to the successful and responsible development operation and closure of any gold ore processing completely updated edition features coverage of established newly implemented

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