Welcome to visit us!

[email protected]
MENU
News
  1. Home
  2. -
  3. sulfide type gold ore leaching process

sulfide type gold ore leaching process

Problem with gold recovery from sulphide ore How may a mill get the maximum recovery of gold from a sulphide ore at the least capital cost and at the same time obtain the highest net return This latter point is most important In many cases a gold mill using an allcyanide flowsheet with fine grinding of all the ore will report very low gold content in the tailings particularly on an

Get Price

Relevance Products Product

More details

  • Designing gold extraction processes Performance study of
    Designing gold extraction processes Performance study of

    Aug 01 2017 · 1 Introduction The governing method for gold ore processing has been cyanide leaching since the late 19th century Marsden and House 2006After decades of active development of the process for various types of ores and concentrates there are several different hydrometallurgical flowsheets for cyanide leaching

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

    Refractory ore resists normal processing methods as the high sulfide minerals trap gold particles making it difficult for the cyanide to reach the gold and leach it Heating To leach gold from refractory ore it must be subjected to high temperature high pressure andor oxygen Newmont treats refractory ore in two ways by using an autoclave

  • Cyanide leaching of gold in solutions containing sulfide
    Cyanide leaching of gold in solutions containing sulfide

    The effect of sulfide ions on gold leaching has been studied previously Jeffrey and Breuer 2000 when it was shown that concentrations of sulfide ion as low as 01 mM 32 ppm resulted in

  • Cyanide Leaching Of Gold Mine
    Cyanide Leaching Of Gold Mine

    Leaching gold from sulfide ores is difficult at best Generally the recovery for cyanide leaching of sulfide or refractory ores is no better than 30 which is not a worthwhile venture The use of alkalies such as calcium oxide will prevent the decomposition of cyanide in

  • How to Use Bleach on Gold Ore to Remove Gold Sciencing
    How to Use Bleach on Gold Ore to Remove Gold Sciencing

    Pour the acidandbleach mixture into the plastic bowl with the ore grains and stir Allow four hours for the gold to dissolve stirring every 20 minutes The chlorine reacts with the gold inside the ore to form gold chloride Filter the ore and bleach solution to remove all the impurities such as soil and rock fragments

  • The process design of gold leaching and carboninpulp
    The process design of gold leaching and carboninpulp

    The gold is recovered from this solution by electrowinning zinc precipitation or refining technology such as the Mintek Minataur process The eluted carbon may still contain various organic 48 2 4 4Au NaCN O H O NaAu CN NaOH → 22 2 The process design of gold leaching and carboninpulp circuits

  • HEAP LEACHING TECHNIQUE in MINING
    HEAP LEACHING TECHNIQUE in MINING

    A chart showing identified applicable process categories for gold ore recovery is given Figure 3 McNab B 2006 This chart is based on a preliminary analysis of 2832 bulk leach extractable gold BLEG results for shearhosted Archean metasediment ores in Western Australia Average Ore Grade Excavation Quantity 20 Cutoff Grade grton 0

  • Ecofriendly gold leaching EcoGoldex Reagent
    Ecofriendly gold leaching EcoGoldex Reagent

    EcoGoldex Oseries The O Series it refers to Ores is specially formulated and manufactured with the purpose of replacing the toxic sodium cyanide in goldsilverPGM rock ore leaching The O series can compete sodium cyanide easily in most rock ore processing including gold leaching rate similar or even better agent consumption similar or slightly higher and leaching time similar or

  • Mining and Extraction Oxide Ores processes for
    Mining and Extraction Oxide Ores processes for

    Extraction of sulfide ores is covered in more detail in Copper Mining and Extraction Sulfide Ores 11–14 but is introduced here because an important byproduct of this process is used for the extraction of oxide ores Pyroprocessing Sulfide Ores Provides Acid for Leaching The process used to treat sulfide copper ores begins at the mine

  • Gold Recovery And How To Choose The Right Process
    Gold Recovery And How To Choose The Right Process

    Refractory Gold The last type of gold deposit is called refractory gold and it is the most difficult type to extract It can be defined as any ore that responds poorly to a conventional gravitycyanidation process with examples including copper porphyry complex sulfides arsenopyrite and leadzinc associations

  • WO2014155753A1 Method for pretreatment of gold ore
    WO2014155753A1 Method for pretreatment of gold ore

    Provided 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

  • ALTA Gold 2012 EDoc Albion Process
    ALTA Gold 2012 EDoc Albion Process

    leaching circuits even when the ore is finely ground The cause of low gold recoveries can be either through the presence of naturally occurring ‘preg robbing’ carbonaceous materials or gold physically ‘locked’ in sulphide minerals The majority of gold ores are classified refractory because the gold mineralogy is contained in sulphides

  • Heap Leach Minings breakthrough technology
    Heap Leach Minings breakthrough technology

    Aug 20 2015 · Heap Leaching of Gold use HL to process primary sulfide ores This would result in a dramatic expansion of the technology as 80 of total ore types are sulfide in nature Heap Leaching

  • Gold Recovery And How To Choose The Right Process
    Gold Recovery And How To Choose The Right Process

    Refractory Gold The last type of gold deposit is called refractory gold and it is the most difficult type to extract It can be defined as any ore that responds poorly to a conventional gravitycyanidation process with examples including copper porphyry complex sulfides arsenopyrite and leadzinc associations

  • US5147617A Process for recovery of gold from gold ores
    US5147617A Process for recovery of gold from gold ores

    A process for recovering gold from goldbearing ores includes the steps of forming a slurry of ground ore and treating the ore with an oxidizing and complexing agent such as hydrogen sulfide or a sulfide salt A chelating agent SO 2 air and an anion exchange resin are added to the slurry to subject the ore to a simultaneous sulfurous acid leaching and anion exchange resin adsorption step

  • Cyanide Leaching Of Gold Mine
    Cyanide Leaching Of Gold Mine

    Leaching gold from sulfide ores is difficult at best Generally the recovery for cyanide leaching of sulfide or refractory ores is no better than 30 which is not a worthwhile venture The use of alkalies such as calcium oxide will prevent the decomposition of cyanide in

  • Refractory Gold Ore Treatment Methods
    Refractory Gold Ore Treatment Methods

    Metallurgical ContentGold Leaching Processing of Arsenic OreMispickel Arsenopyrite FeAsS6Leaching and Recovering Gold from Antimony MineralsStibnite Antimony Sulphide Sb2S2Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic antimony tellurium and

  • How to Use Bleach on Gold Ore to Remove Gold Sciencing
    How to Use Bleach on Gold Ore to Remove Gold Sciencing

    Pour the acidandbleach mixture into the plastic bowl with the ore grains and stir Allow four hours for the gold to dissolve stirring every 20 minutes The chlorine reacts with the gold inside the ore to form gold chloride Filter the ore and bleach solution to remove all the impurities such as soil and rock fragments

  • Pretreatment Process on Refractory Gold Ores with As
    Pretreatment Process on Refractory Gold Ores with As

    It can dramatically improve gold cyanide leaching rate Roasting has advantages of mature and reliable technology simple operation adaptability it is easy to form secondary wrapping to reduce leaching rate of gold in the roasting process and at the same time produces gases of SO 2 and As 2 O 3 polluting environment seriously In ores with a high sulphide content this treatment

  • The Grinding Fineness the Factor Affecting Gold Leaching
    The Grinding Fineness the Factor Affecting Gold Leaching

    Cyanide leaching process is one of the common gold ore beneficiation processes The process index depends on factors such as gold particle size sulfide content ore block size leaching speed leaching time cyanide concentration and leaching slag washing degree The factors that affect gold leaching include grinding fineness pH temperature cyanide dosage pulpsolidliquid ratio leaching

  • How to Extract Gold with Microbial Heap Leaching Xinhai
    How to Extract Gold with Microbial Heap Leaching Xinhai

    Now heap leaching is a popular way to separate gold from ore Gravity flotation amalgamation cyaniding resin in pulp carbon plasma adsorption and dump leaching are commonly used in gold processing When gold ore is covered by sulfide ore it is hard for cyanide to react with gold ore within

  • The leaching and adsorption behaviour of gold ores
    The leaching and adsorption behaviour of gold ores

    from the dissociation of the complex is used to leach gold from the ore The stepwise dissociation of cyanide from coppercyanide complexes can also be used to leach gold from a variety of oxide and sulphide ores The copper cyanides fourth ligand readily dissociates at low cyanide concentrations for use in gold leaching

  • The effect of grinding chemistry on cyanide leaching of
    The effect of grinding chemistry on cyanide leaching of

    Nov 01 2017 · While goldbearing sulfide ore cyanidation can be challenging there is a great variation in the extent to which sulfide minerals affect the leaching process Deschenes et al 2003 suggested that all sulfide minerals could be divided into three groups depending on their effect on gold leaching •

  • Process for treating refractory gold ores by roasting
    Process for treating refractory gold ores by roasting

    Microscopic gold inclusions in sulfide minerals cannot typically be extracted by conventional cyanidation The gold ore must be pretreated to oxidize sulfide minerals associated with gold and to remove other minerals and chemical compounds that interfere in the cyanidation leaching process The recovery of gold from refractory sulfidiccarbonaceous ores after roasting pretreatment was studied

  • Small Scale Treatment of PM Sulfide Ores Gold Refining
    Small Scale Treatment of PM Sulfide Ores Gold Refining

    Feb 15 2020 · The point is that sulfide ores can be highly variable You can see that with sulfide ores there are a million and one possibilities and while some types can be treated similarly there are many different categories or types There can never be a one size fits all approach We can all wish for rich free gold ore

  • Basic theory and optimization of gold containing
    Basic theory and optimization of gold containing

    study The main chemical composition of the ore sample is shownin Table 1 The leaching rate of gold will be weak due to the influence of antimony if direct leaching gold is carried out by cyanide As is well known Asbearing gold ore is leached ineffectively Thus the ore was refractory gold ore because the content of As was 273

  • Biomining metal recovery from ores with microorganisms
    Biomining metal recovery from ores with microorganisms

    Up to now biomining has merely been used as a procedure in the processing of sulfide ores and uranium ore but laboratory and pilot procedures already exist for the processing of silicate and oxide ores eg laterites for leaching of processing residues or mine waste dumps mine tailings as well as for the extraction of metals from

  • A Method for Leaching or Dissolving Gold from Ores or
    A Method for Leaching or Dissolving Gold from Ores or

    The hydrometallurgical leaching of native gold from goldbearing ores or the dissolution of gold metal during the recycling of electronic and precious metal scrap is performed every day using hazardous chemicals such as sodium cyanide or aqua regia These chemicals represent health and safety risks for workers and a serious threat for the

  • Ecofriendly gold leaching EcoGoldex Reagent
    Ecofriendly gold leaching EcoGoldex Reagent

    EcoGoldex Oseries The O Series it refers to Ores is specially formulated and manufactured with the purpose of replacing the toxic sodium cyanide in goldsilverPGM rock ore leaching The O series can compete sodium cyanide easily in most rock ore processing including gold leaching rate similar or even better agent consumption similar or slightly higher and leaching time similar or

  • 3 Reviewing a Typical EIA for a Mining Project
    3 Reviewing a Typical EIA for a Mining Project

    method of treating gold ores and is the chief method in use In this technique sodium or potassium cyanide solution is either applied directly to ore on open heaps or is mixed with a fine ore slurry in tanks heap leaching is generally used to recover gold from lowgrade ore while tank leaching is used for higher grade ore”15 The EIA

  • The process design of gold leaching and carboninpulp
    The process design of gold leaching and carboninpulp

    The gold is recovered from this solution by electrowinning zinc precipitation or refining technology such as the Mintek Minataur process The eluted carbon may still contain various organic 48 2 4 4Au NaCN O H O NaAu CN NaOH → 22 2 The process design of gold leaching and carboninpulp circuits

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

    Gold processing Gold processing Mining and concentrating The nature of the ore deposit determines the mining and mineral processing techniques applied Oxide ore deposits are frequently of such low grade eg 3 to 10 parts per million that extensive mineral processing cannot economically be justified In this case they are merely shattered by explosives and then piled into heaps for

  • Diagnostic Leaching for Refractory Gold Ores
    Diagnostic Leaching for Refractory Gold Ores

    A diagnostic leach test can be very useful to qualitatively assess how gold occurs within the ore and the extent to which it may be refractory Several different permutations of diagnostic leach tests depend on specific objectives but they generally involve the sequential leaching of a gold ore sample with progressively stronger reagents producing a qualitative assessment of the gold

Latest News

to-top
Chat Online
Click avatar to contact us