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the effect of copper on leaching of gold ore

Processing Gold Ores Using Heap LeachCarbon Adsorption Methods The gold dissolution rate is dependent on the concentration of NaCN and the alkalinity cyanide solution and has very little adverse effect on the leaching of gold material is crushed to a size that will give good liberation or exposure of »More detailed


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Effect of Leaching on Permeability of Copper Ores
Effect of Leaching on Permeability of Copper Ores

As leaching progresses and the copper in the specimen is depleted the amount of copper recovered per day of leaching decreases There is a definite increase in permeability as leaching progresses This is primarily due to the dissolution of copper minerals along

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

Treatment of copperrich gold ore by cyanide leaching
Treatment of copperrich gold ore by cyanide leaching

This in turn suggests the selective dissolution of copper over gold Fig 4 Effect of NaCN concentration on extraction of gold from ore Fig 5 Effect of NaCN concentration on dissolution of copper from ore 32 Ammonia pretreatment Figure 6 illustrates that the pretreatment by ammonia leaching renders the ore amenable to high extraction of gold

PDF Effect of High Concentration of Ammonia in Cyanide
PDF Effect of High Concentration of Ammonia in Cyanide

Effect of High Concentration of Ammonia in Cyanide Leaching of a CopperGold Ore

Effect of Pretreatment on Leaching Primary Copper
Effect of Pretreatment on Leaching Primary Copper

effect on copper dissolution from primary copper sulfide ore in an acidchloride medium It also provides a feasible alternative for treating primary copper sulfide ores at the industrial level Keywords chalcopyrite chloride leaching pretreatment seawater 1 Introduction

Ammoniacal thiosulfate leaching of refractory oxide gold ore
Ammoniacal thiosulfate leaching of refractory oxide gold ore

Jul 10 2017 · To the best knowledge of the authors the ammoniacal thiosulfate leaching of Sarigunay refractory gold ore has not been studied yet In this study the effects of thiosulfate ammonia and copper ion concentrations as well as leaching parameters such as

Gold Metallurgy  Leaching in Cyanicides
Gold Metallurgy Leaching in Cyanicides

Leaching Gold with Zinc Minerals in Ore These reactions and elimination of soluble zinc with mechanical losses of solution in filter cakes etc normally prevent zinc from building up to serious proportions in the circuit If however zinc is used to precipitate solutions high in copper see cyanide regeneration

Cyanide Leaching Of Gold
Cyanide Leaching Of Gold

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

Heap Leaching  Mineral Processing  Metallurgy
Heap Leaching Mineral Processing Metallurgy

heap leaching of copper ores leaching oxidized copper ores effect of strength of acid in leaching Heap Leach Pad Design Because flow is downward in percolation leaching the leach pad is the most important element of the solution containment system The leach pad supports the ore heaps collects solution flowing through the heaps transports the solution laterally to drainage pipes or ditches and

Heap leaching  Wikipedia
Heap leaching Wikipedia

The final product is cathode copper Nickel ores This method is an acid heap leaching method like that of the copper method in that it utilises sulfuric acid instead of cyanide solution to dissolve the target minerals from crushed ore The amount of sulfuric acid required is much higher than for copper ores as high as 1000 kg of acid per tonne of ore but 500 kg is more common

Gold and copper leaching from goldcopper ores and
Gold and copper leaching from goldcopper ores and

This research introduces a leaching approach to extract gold silver and copper from goldcopper ores and concentrates using a synergistic lixiviant leaching process using glycine in the presence of low concentrations of cyanide The effects of glycine and cyanide concentrations on gold silver and copper leaching kinetics and recovery were

Gold cyanidation  Wikipedia
Gold cyanidation Wikipedia

Lead nitrate can improve gold leaching speed and quantity recovered particularly in processing partially oxidized ores Effect of dissolved oxygen Oxygen is one of the reagents consumed during cyanidation and a deficiency in dissolved oxygen slows leaching rate Air or pure oxygen gas can be purged through the pulp to maximize the dissolved oxygen concentration

Alternative lixiviants to cyanide for leaching gold ores
Alternative lixiviants to cyanide for leaching gold ores

Alternative lixiviants to cyanide for leaching gold ores MG Aylmore Placer Dome Technical Services Ltd 323 Alexander St Vancouver BC Canada V6A 1C4 Over 25 alternative lixiviant processes to cyanide have been tested in the laboratory some of which have been successful for niche applications

Leaching of gold and copper minerals in cyanide deficient
Leaching of gold and copper minerals in cyanide deficient

The concept of leaching copper–gold ores using leach solutions which contain CuCN32− was investigated Gold leaching occurs in air saturated CuCN32− solutions at a much slower rate than in free cyanide solutions A similar gold leach rate is observed when copper is alloyed with the gold

GLYCINE AS A LIXIVIANT FOR THE LEACHING OF LOW
GLYCINE AS A LIXIVIANT FOR THE LEACHING OF LOW

During the leaching of the AuCu sulfide ore gold dissolution occurred concurrently with copper dissolution at 25 °C This observation was attributed to galvanic interactions since the sulfide ore naturally contained pyrite Increases in glycine concentration also improved the dissolution of both copper and gold from the sulfide ore

AMMONIACAL THIOSULPHATE LEACHING OF A COPPERRICH GOLD ORE
AMMONIACAL THIOSULPHATE LEACHING OF A COPPERRICH GOLD ORE

In leaching of gold ores containing copper addition of copper into the system may not be required since copper that would dissolve from the ore is likely to be sufficient for thiosulphate

Effect of activated carbon on the thiosulfate leaching of gold
Effect of activated carbon on the thiosulfate leaching of gold

The use of activated carbon as catalyst in the thiosulfate leach of gold is a process alternative that may not require the addition of surrogate oxidants like copper can work at temperatures as low as 30 °C and thiosulfate degradations of 21 kg per ton of ore or lower making it

Gold leaching in cyanidestarved copper solutions in
Gold leaching in cyanidestarved copper solutions in

In the cyanidation of copper–gold ores to recover precious metals the presence of copper minerals can cause a number of serious prob lems which include but are not limited to

PDF Treatment of a CopperRich Gold Ore by Ammonia
PDF Treatment of a CopperRich Gold Ore by Ammonia

Copper minerals present difficulties during the cyanide leaching of gold ores leading to excessively high consumption of cyanide and oxygen coupled with low extraction of gold Copper cyanide species if present at high levels adversely affects the downstream processes such as the activated carbon adsorption and the effluent treatment

EFFECT OF SILVER NICKEL AND COPPER CYANIDES
EFFECT OF SILVER NICKEL AND COPPER CYANIDES

Gold is recovered from its ores hydrometallurgically by the cyanide leach process The gold reacts with cyanide according to reaction Davidson and Sole 2007 Au0 2CN– ½ H 2O ¼ O2 → AuCN2 – OH– 1 The gold ore after grinding to 80 –5 micrometers is fed to leaching tanks in the form of slurry including 45 solid

The Metallurgy of Cyanide Gold Leaching – An Introduction
The Metallurgy of Cyanide Gold Leaching – An Introduction

Oct 20 2014 · With lower gold grades beneficiation usually flotation is often used ahead of leaching to increase the grade of Au and reduce the quantity of ore to be leached Nature of Gold The surface of a gold particle will typically be dissolved at a rate of around 0205

PDF Ammoniacal thiosulphate leaching of gold ore
PDF Ammoniacal thiosulphate leaching of gold ore

The leaching is improved significantly at a particular ratio of ammonia to thiosulphate concentration and that ratio varies from ore to ore Copper ions act as an oxidant and the gold dissolution

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

metallurgical leaching of gold ores by cyanidation or in the aqua regia process used for the recovery of secondary gold from electronic and precious scraps the lixiviant and the reagent are both highly hazardous chemicals These chemicals pose health and safety risks as well as a

How to Leach Gold Ore With Chlorination  Sciencing
How to Leach Gold Ore With Chlorination Sciencing

How to Leach Gold Ore With Chlorination The mixture should be 15 percent sodium hypochlorite and 33 percent hydrochloric acid The mixture should cover the rocks so multiply the mixture until the rock is covered Insert the ORP meter so the probe side is in the water mixture An ORP meter is used to measure oxidation

INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING
INFLUENCE OF LEAD NITRATE ON CYANIDE LEACHING

Influence of lead nitrate on cyanide leaching of gold and silver from Turkish gold ores 509 similar effect inhibiting partially the formation of sulfur layer However in the case of chalcopyrite this mechanism is not observed Deschenes et al 2000 On the other hand in the presence of

Effect of associated minerals on cyanide leaching gold in
Effect of associated minerals on cyanide leaching gold in

Pyrite and hematite have little effects Chalcopyrite and chalcocite have great effects on cyanide leaching in copper minerals

Associated Sulfide Minerals in Thiosulfate Leaching of
Associated Sulfide Minerals in Thiosulfate Leaching of

The effects of some associated minerals on thiosulfate gold leaching were studied through thermodynamic analysis and leaching experiments on composite ore samples containing various minerals and a reference silicate gold ore In the leaching test on the reference gold ore about 93 of gold was extracted within 30 hours

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