leaching of gold from copper rich ores

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INVESTIGATION OF THE AMENABILITY OF A COPPER

The presence of cyanicides eg copper minerals and encapsulation of gold in minerals such as pyrite and arsenopyrite are common reasons for refractoriness of gold or In this study the amenability of a copper-rich gold ore 108 g/t Au 160 Cu to cyanide leaching...

leaching of gold from iron ore

Leaching Pyrite Gold Ore without Cyanide Thiourea Leaching In order to compare gold dissolution from the ore with and without pretreatment for another lixiviant the system of thiourea-ferric sulfate was chosen Figure 9 shows the results for gold leaching at SC NH2 2 0 of 015 M 114 g/L and Fe 3 0 of 002 M 112 g/L and pH 2...

PDF Cyanidation of gold ores containing copper silver

Cyanidation of gold ores containing copper silver lead arsenic and antimony 2010 68-77 results in oxidation on the gold grains Kondos et al 1995 In the leaching of gold using cyanide copper presents difficulties due to the lack of selectivity of cyanide for gold over copper Rees and van Deventer 1999 Rees and van Deventer...

Treatment of copper

DOI 101016/S1003-6326 15 63642-1 Corpus ID 56375473 Treatment of copper-rich gold ore by cyanide leaching ammonia pretreatment and ammoniacal cyanide leaching article Bas2015TreatmentOC title= Treatment of copper-rich gold ore by cyanide leaching ammonia pretreatment and ammoniacal cyanide leaching author= A D Bas and Elif Koç and E Y...

Amino acids key to new gold leaching process

Oct 24 2014 0183 32 He says it can be used to more easily extract gold from poly-metallic ores such as copper-gold ores by staging the extractions Amino acids dissolve copper at...

A Method for Leaching or Dissolving Gold from Ores or

The hydrometallurgical leaching of native gold from gold-bearing 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...

Gold and copper leaching from gold

May 01 2017 0183 32 The following sections cover the gold and copper extraction from ores and gold silver and copper extraction form a concentrate 32 Gold-copper ores gold-copper oxid The gold extraction from leaching gold-copper oxides ore containing 129 ppm gold and 004 copper has been studied The copper in such ore is present at nuisance levels...

Microbial Leaching Bioleaching Biomining

Gold and Silver Leaching Today s microbial leaching of refractory precious metal ores to enhancegold and silver recovery is one of the most promising applications Gold is obtained through bioleaching of arsenopyrite/pyrite ore and its cyanidation process Silver is more readily solubilized than gold during microbial leaching of iron sulfide...

Leaching of a pyrite

Jun 24 2020 0183 32 The oxidation of sulfide-based ores is industrially relevant as it facilitates the extraction of valuable metals and eliminates undesired elements from an ore Even though oxidation can be done thermally pyrometallurgy solution-based hydrometallurgical methods are currently sought as they represent a more sustainable option Here the leaching of a sulfide ore 32 Fe 2 Cu is...

Heap Leaching of Gold and Silver Ores

HEAP LEACHING OF GOLD SILVER ORESHeap leaching is the process to extract precious metals like gold silver copper etc from their ore by placing them on a...

A Method for Leaching or Dissolving Gold From Ores or

Aug 18 2005 0183 32 It is known that gold can be efficiently leached from gold- bearing ores using a mixture of hydrochloric acid ferric chloride and manganese dioxide12 The chemical reaction involved during the...

Leaching in Metallurgy and Metal Recovery

Jul 10 2017 0183 32 The metal containing solid such as concentrate ore residue or slag often undergoes size reduction via crushing and grinding prior to leaching One example of a leaching process that uses vat leaching is gold cyanidation the process of extracting gold from low-grade or...

Treatment of copper

Feb 01 2015 0183 32 Fig 1 XRD profile of copper-rich gold ore sample Fig 2 Sulphides of copper and other metals identified by SEM analysis of flotation concentrate produced from ore for mineralogical analysis 22 Leaching tests Leaching tests were conducted in baffled glass reactors 1000 mL in nominal capacity into which leach solutions 480 mL and the ore...

The treatment of copper

The application of ammonium thiosulfate for the treatment of copper-gold ores has been investigated Leaching studies were conducted with copper minerals copper minerals with gold addition to solution and copper-gold samples of different copper and gold grad The behaviour of thiosulfate tetrathionate and sulfate in solution was studied using ion chromatography The copper sulfide...

Bioleaching of Gold Ore Example Graduateway

Bioleaching has been applied to copper and uranium deposits for many years but more recently has been applied to gold ore refractory and refractory concentrat This process involves the oxidation of sulfide ferrous and sometimes carbon containing minerals in order to liberate the gold trapped within...

Bioleaching

Bioleaching is the extraction of metals from their ores through the use of living organismsThis is much cleaner than the traditional heap leaching using cyanide Bioleaching is one of several applications within biohydrometallurgy and several methods are used to recover copper zinc lead arsenic antimony nickel molybdenum gold silver and cobalt...

Extracting Gold HowStuffWorks

Leaching dissolves the gold out of the ore using a chemical solvent The most common solvent is cyanide which must be combined with oxygen in a process known as carbon-in-pulp As the cyanide and oxygen react chemically gold in the pulp dissolv When workers introduce small carbon grains to the tank the gold adheres to the carbon...

Modelling and simulation of gold ore leaching

method to recover gold from or Different processes can be used to perform this chemical separation Some rely on Bellec S Hodouin D Bazin C Khalesi M R and Duchesne C Modelling and simulation of gold ore leaching World Gold Conference 2009 The Southern African Institute of Mining and Metallurgy 2009...

Treatment of copper

ammoniacal cyanide 11 12 leaching of copper prior to cyanidation 2 6 8 cyanide recovery from effluents eg SART process 5 preaeration prior to cyanidation 6 13 14 and addition of lead nitrate 14 15 have been tested for the treatment of copper-rich gold or Table 1 Solubility of copper minerals in 01 NaCN solution 1 2...

TECHNICAL PAPER

Gold Recovery from Copper-Rich Ores Employing the Purolite S992 Gold-Selective Ion Exchange Resin This paper discusses the use of a commercially available ion exchange resin with an exceptionally high selectivity for gold over copper Presented at the Alta 2012 Gold Conference 31 May to 1 June 2012 Perth Australia...

PDF Treatment of a Copper

Jan 01 2012 0183 32 In this current study the extraction of gold from a high grade copper-rich gold ore by copper-assisted ammoniacal thiosulphate leaching was studied by adopting Taguchi L 9 3 3 experimental...

Biological methods of metal extraction

is limited For example high-grade copper ores which contain a high percentage of copper are becoming harder to find and mine There are some alternative methods to extract metals...

Copper recovery using leach/solvent extraction

leaching of high-grade copper oxide ore followed by EW of copper from the leach solution produced low quality copper cathode at relatively high cost In 1968 the tonnage of high-grade oxide ores was decreasing and vat leaching was on the decline The second process heap and dump leaching of low-...

Conference Proceeding AMMONIACAL THIOSULPHATE LEACHING

In this study copper-assisted ammoniacal thiosulphate leaching of a copper-rich gold ore was studied A cyanide leaching test was also carried out for comparison The experiments were designed using a Taguchi L9 33 design for the evaluation of the effects of initial concentrations of thiosulphate ammonia and copper on gold extraction...

TREATMENT OF A COPPER

In this study ammoniacal cyanide leaching of gold for the treatment of a copper-rich refractory gold ore was investigated Ammonia leaching as a process ahead of cyanidation was also examinedpretreatment Some additives were testedto reduce the copper interferenc Direct cyanide leaching of gold was carried out for comparison...

Heap leaching

Heap leaching is an industrial mining process used to extract precious metals copper uranium and other compounds from ore using a series of chemical reactions that absorb specific minerals and re-separate them after their division from other earth materials Similar to in situ mining heap leach mining differs in that it places ore on a liner then adds the chemicals via drip systems to the...

Establishing thE ProcEss MinEralogy of gold orEs

4 Silver-rich ores Gold commonly occurs as electrum although kustelite may be present in some or Native silver may be present Rochester Candelaria and Tombstone USA La Coipa Chile 5 Copper sulfide ores Gold occurs as coarse liberated particles and fine particles locked in pyrite and copper...

Recovery of Gold and Silver and Removal of Copper Zinc

Jan 18 2015 0183 32 Most common copper minerals are soluble in the dilute cyanide solution typically found in leach conditions during the gold cyanidation process Minerals such as azurite and lachite are fast leached and are soluble in ma dilute cyanide solutions The next process for recovery gold and silver from the pregnant cyanide solutions 10...

GLYCINE AS A LIXIVIANT FOR THE LEACHING OF LOW GRADE

Copper-gold ores oxides Cu-Au ore A sulfides Cu-Au B and Cu-Au C leaching in alkaline glycine solution that Cu and Aurevealed simultaneously leach from both ore typ However Cu leaches faster than gold...

Heap leaching a stack of gold

Apr 25 2018 0183 32 Heap leaching can take anything from a couple of months to several years In the case of gold recovery heap leaching generally requires 60 to 90 days to leach the ore compared to the 24 hours required by a conventional agitated leach process Gold recovery is also usually only 70 compared with 90 recovery in an agitated leach plant...

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