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leaching of gold copper ores with ammoniacal cyanide solutions:

Treatment of copper-rich gold ore by cyanide leaching ...

2015-2-1 · Trans. Nonferrous Met. Soc. China 25(2015) 597−607 Treatment of copper-rich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching A. D. BAS, E. KOC, E. Y. YAZICI, H. DEVECI Hydromet-B&PM Group, Division of Mineral & Coal Processing, Department of Mining Engineering, Karadeniz Technical University, Trabzon 61080, Turkey Received 28 March

(PDF) Treatment of a Copper-Rich Gold Ore by Ammonia ...

Pregnant leach solutions (PLSs) obtained from cyanide leaching of gold/silver ores often contain gold as well as other impurities such as copper (Bas et al., 2012 and Bas et

Use of the ammonia cyanide leach system for gold copper ...

1992-10-1 · Minerals Engineering, Vol. 5, Nos 10-12, pp. 1421-1429, 1992 0892-6875/92 $5.00+0.00 Printed in Great Britain @ 1992 Pergamon Press Ltd USE OF THE AMMONIA CYANIDE LEACH SYSTEM FOR GOLD COPPER ORES WITH REFERENCE TO THE RETREATMENT OF THE TORCO TAILINGS M.C. COSTELLO, I.C. RITCHIE and D.J. LUNT Minproc Engineers Pty Ltd, PO Box 403,

TREATMENT OF A COPPER - RICH GOLD ORE BY

2016-8-3 · during ammonia leaching. Keywords: ammoniacal cyanide leaching, pre-treatment, lead nitrate, copper-gold ore, gold . INTRODUCTION . Cyanidation process is extensively usedfor leaching of gold from ores since cyanide forms strong complexes with gold. In this process, some impurities such as copper and arsenic problems are present (Hayes and Corrans,

Treatment of copper-rich gold ore by cyanide leaching ...

Ammonia pretreatment is shown to readily eliminate the copper interference, allowing almost complete extraction of gold with concomitantly low reagent consumption in subsequent cyanide leaching. In ammoniacal cyanide system, Box-Behnken experimental design shows the main and interaction effects of NH 3, NaCN and Pb(NO 3) 2.

(PDF) Effect of High Concentration of Ammonia in Cyanide ...

A. D. Bas, E.Y. Y azici, O. Celep, H. Deveci. ABSTRACT Cyanide leaching of gold ores that contain high copper ( ≥ 0.5% Cu) is often not. economic due to excessively high

[PDF] Gold leaching by copper(II) in ammoniacal ...

Gold leaching in thiosulphate media has attracted renewed interest of many researchers over the last three decades due to fast kinetics in the presence of some oxidants/ligands and its adaptability to gold ores which are unsuitable for direct cyanidation. The acidity (pH) and the concentrations of copper(II), ammonia, thiosulphate and polythionates produced by the reaction between copper(II ...

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

2005-8-1 · The concept of leaching copper–gold ores using leach solutions which contain Cu(CN) 3 2− was investigated. Gold leaching occurs in air saturated Cu(CN) 3 2− 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.

(PDF) An Overview of Treatment of Copper-gold Ores

Copper-gold ores prove difficult to treat with conventional cyanide leaching process due to severe interference of copper minerals with cyanide leaching. Most of the copper

Gold dissolution in non-ammoniacal thiosulphate

2016-10-12 · ammoniacal copper(II)/thiosulphate system offers fast leaching kinetics, but there are ... particularly for treating certain refractory, copper-gold, and carbonaceous ores, where the recovery of gold by cyanidation is poor. However, the oxygenated ammoniacal copper(II)/thiosulphate ... sodium cyanide solution at room temperature with air added ...

Use of the ammonia cyanide leach system for gold copper ...

1992-10-1 · Minerals Engineering, Vol. 5, Nos 10-12, pp. 1421-1429, 1992 0892-6875/92 $5.00+0.00 Printed in Great Britain @ 1992 Pergamon Press Ltd USE OF THE AMMONIA CYANIDE LEACH SYSTEM FOR GOLD COPPER ORES WITH REFERENCE TO THE RETREATMENT OF THE TORCO TAILINGS M.C. COSTELLO, I.C. RITCHIE and D.J. LUNT Minproc Engineers Pty Ltd, PO Box 403,

[PDF] Gold leaching by copper(II) in ammoniacal ...

Gold leaching in thiosulphate media has attracted renewed interest of many researchers over the last three decades due to fast kinetics in the presence of some oxidants/ligands and its adaptability to gold ores which are unsuitable for direct cyanidation. The acidity (pH) and the concentrations of copper(II), ammonia, thiosulphate and polythionates produced by the reaction between copper(II ...

Research on leaching of carbonaceous gold ore with

2019-6-15 · 1. Introduction. The use of dilute sodium cyanide or potassium cyanide solutions for the leaching of gold and silver from their ores was known as early as 1888 (Marsden and House, 2006).Cyanidation process has been the most successfully practiced method for gold extracting from ores over the past 100 years.

(PDF) Industrial Application of Ammonia Assisted Cyanide ...

Treatment of copper-rich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching. Trans. Nonferrous Met. Soc. China, 25, 597-607 Costello M.C., Ritchie I.C., Lunt D.J., 1992. Use of ammonia–cyanide leach system for copper–gold ores with reference to

(PDF) An Overview of Treatment of Copper-gold Ores

Copper-gold ores prove difficult to treat with conventional cyanide leaching process due to severe interference of copper minerals with cyanide leaching. Most of the copper minerals readily react ...

INVESTIGATION OF THE AMENABILITY OF A COPPER

2020-12-24 · treatment of copper-rich gold ores, in particular, include the removal of copper sulphides by flotation followed by cyanide leaching, the elimination of copper in acid/alkaline solutions prior to cyanide leaching, the use of alternative lixiviant systems (e.g., thiosulphate leaching, ammoniacal cyanide leaching) (Ahlatcı et al.,

Gold dissolution in non-ammoniacal thiosulphate

2016-10-12 · ammoniacal copper(II)/thiosulphate system offers fast leaching kinetics, but there are ... particularly for treating certain refractory, copper-gold, and carbonaceous ores, where the recovery of gold by cyanidation is poor. However, the oxygenated ammoniacal copper(II)/thiosulphate ... sodium cyanide solution at room temperature with air added ...

Eliminating Copper from Gold Ore

2015-10-11 · Copper minerals, even though minor components of precious metal ores, dissolve in these cyanide leaching solutions, consume cyanide, cause fouling of mill solutions, and thus interfere with the precipitation and recovery of gold.2,3,4 Here is a

The selective leaching of copper from a gold–copper ...

2020-12-11 · activated carbon or ion-exchange resins; (4) cyanide leaching and selectively recovering copper from solution; and (5) selectively leaching either copper or gold with alternative reagents. The decision as to which of these approaches to apply depends upon the relative amounts of copper and gold present, the mineralogy and process economics.

Thiosulphate leaching of gold in the presence of ...

The leaching mechanism for silver by ammoniacal thiosulphate solutions with copper was similar to that for gold, as silver generally existed in the form of Ag/Au alloys in gold ores. Therefore, hexametaphosphate and orthophosphate are expected to follow similar mechanisms in enhancing both gold and silver leaching.

Research on leaching of carbonaceous gold ore with

2019-6-15 · 1. Introduction. The use of dilute sodium cyanide or potassium cyanide solutions for the leaching of gold and silver from their ores was known as early as 1888 (Marsden and House, 2006).Cyanidation process has been the most successfully practiced method for gold extracting from ores over the past 100 years.

Study of gold leaching in oxygenated solutions containing ...

Gold and copper often occur together in ores, an occurence which creates processing difficulties since cyanide solutions are not selective for gold. Although it has been shown that ammoniacal cyanide solutions can leach gold selectively, little practical use has been made of this finding since the mechanism is not yet understood and strategies for optimisation have not been fully developed.

Thermodynamic analysis of gold leaching by ammoniacal ...

2001-11-1 · Thiosulfate offers a nontoxic alternative to cyanide for processing gold ores. The mechanism of leaching gold using ammoniacal thiosulfate solution is driven by the Cu(II)-Cu(I) redox couple and is complicated by competing ligands such as NH 3 and S 2 O 3 2−.It is shown that an understanding of the copper speciation and sulfur speciation is required to optimize this system.

(PDF) Industrial Application of Ammonia Assisted Cyanide ...

Treatment of copper-rich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching. Trans. Nonferrous Met. Soc. China, 25, 597-607 Costello M.C., Ritchie I.C., Lunt D.J., 1992. Use of ammonia–cyanide leach system for copper–gold ores with reference to

Gold dissolution in non-ammoniacal thiosulphate

2016-10-12 · ammoniacal copper(II)/thiosulphate system offers fast leaching kinetics, but there are ... particularly for treating certain refractory, copper-gold, and carbonaceous ores, where the recovery of gold by cyanidation is poor. However, the oxygenated ammoniacal copper(II)/thiosulphate ... sodium cyanide solution at room temperature with air added ...

INVESTIGATION OF THE AMENABILITY OF A COPPER

2020-12-24 · treatment of copper-rich gold ores, in particular, include the removal of copper sulphides by flotation followed by cyanide leaching, the elimination of copper in acid/alkaline solutions prior to cyanide leaching, the use of alternative lixiviant systems (e.g., thiosulphate leaching, ammoniacal cyanide leaching) (Ahlatcı et al.,

An electrochemical study of the copper-gold-cyanide

Gold and copper often occur together in ores, an occurrence which creates processing difficulties since cyanide leach solutions are not selective for gold. Copper contamination can result in serious problems throughout the conventional carbon-inpulp process, often making the operation uneconomic. This thesis describes electrochemical studies of two ways of dealing with copper contamination.

The selective leaching of copper from a gold–copper ...

2020-12-11 · activated carbon or ion-exchange resins; (4) cyanide leaching and selectively recovering copper from solution; and (5) selectively leaching either copper or gold with alternative reagents. The decision as to which of these approaches to apply depends upon the relative amounts of copper and gold present, the mineralogy and process economics.

金矿非氰化浸金研究进展 - USTB

2020-11-15 · Oraby E A, Eksteen J J, Tanda B C. Gold and copper leaching from gold-copper ores and concentrates using a synergistic lixiviant mixture of glycine and cyanide. Hydrometallurgy, 2017, 169: 339 doi: 10.1016/j.hydromet.2017.02.019 [30]

Thiosulphate leaching of gold in the presence of ...

The leaching mechanism for silver by ammoniacal thiosulphate solutions with copper was similar to that for gold, as silver generally existed in the form of Ag/Au alloys in gold ores. Therefore, hexametaphosphate and orthophosphate are expected to follow similar mechanisms in enhancing both gold and silver leaching.