cyanide ammonia leaching of copper gold ores

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Treatment of copper

The treatment of a copper sulphide-bearing gold ore by direct cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching was investigated Dissolution behaviour of gold and copper in these leaching systems was demonstrated...

The use of geometallurgy in the processing of a complex ,

standardised cyanide leaching test to measure its gold The decision on which of these processing routes is optimal for any particular batch of ore is based on geometallurgical factors, such as gold grade, copper grade, cyanide leaching amenability and consumption, and ore mineralogy 4 The use of geometallurgy...

Cyanide Amenability Studies of Gold Ores

operational parameters eg leaching time, particle size and cyanide concentration on gold cyanidation process of three pit sampl The gold content of the pit samples were 1313 g/t, 328 g/t and 783 g/t respectively for Prestea underground ore Pit A , Beta North Oxide ore Pit B and Mampong Transition ore Pit C...

Ammonia Leaching A New Approach of Copper Industry in ,

10-12-2013 0183 32 Ammonia leaching was first used for recovery of non-ferrous metals such as copper from oxide ores or ores containing pure copper, but gradually the use of this technology was developed from more traditional elements of copper, nickel and cobalt to the extractive metallurgy of zinc, cadmium, silver and gold...

Treatment of a Copper

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 In this study, the extraction ,...

Kinetic Investigation and Dissolution Behavior of Cyanide ,

10-05-2019 0183 32 Cyanidation of Gold-Bearing Ores Taylor Francis CRC Press, Boca Raton, 2018 15 , Thiosulfate-copper-ammonia leaching of pure gold and ,...

Industrial Application of Ammonia Assisted Cyanide ,

that the extraction of copper was halved by the use of ammonia, thus leading to significant reductions in the amount of cyanide consumed in the full-scale leaching system KEYWORDS Gold-copper ore treatment Gedabek mine, Azerbaijan Resin-in-pulp process for gold extraction Ammonia assisted cyanide leaching Plant-scale results 1...

INVESTIGATION OF THE AMENABILITY OF A COPPER

milling gold or 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 was investigated...

The leaching and adsorption behaviour of gold ores

44 the effect of copper cyanide on gold leaching from oxide and sulphide ores 110 45 summary 114 chapters preg-robbing phenomena in the cyanidation of gold ores 116 51 objectives of this chapter 116 52 background information 116 53 preg-robbing behaviour by the ores at low cyanide concentrations 118...

PDF Industrial Application of Ammonia Assisted Cyanide ,

Industrial Application of Ammonia Assisted Cyanide Leaching for Copper-Gold Ores Farhang Hedjazi and A John Monhemi us Anglo Asian Mining plc, Baku, Azerbaijan ABSTRACT A description of the....

PDF An Overview of Treatment of Copper

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

PDF Industrial Application of Ammonia Assisted Cyanide ,

AMMONIA ASSISTED CYANIDE LEACHING 31 Previous Work The use of ammonia to reduce the consumption of cyanide during the leaching of gold from copper-bearing ores was patented in 1902 by Bertram Hunt Hunt 1902 , during the first period of intense R D activity in gold metallurgy that followed the invention of the cyanide process by JS MacArthur and the ,...

A Review of the Cyanidation Treatment of Copper

21-05-2020 0183 32 The cyanidation of copper flotation tailings containing sulfides for gold recovery is an example of the formation of cyanide complexes with copper and silver during the leaching process 11,12 Figure 4 shows the MLA Automated Minerology image of an ore sample from a copper mine in Mexico, containing chalcopyrite and bornite as copper sulfide minerals...

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...

PDF Treatment of a Copper

In this study, the extraction of gold from a copper-bearing gold ore by ammoniacal cyanide leaching was studied Furthermore, ammonia leaching as a pretreatment process ahead of cyanide leaching....

Treatment of copper

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 2014 accepted 1 September ,...

TREATMENT OF A COPPER

Ammonia as a modifying agent to mitigate copper interferences in cyanide leaching of gold has been known for over 100 years as it was discovered ,...

DEVELOPMENT OF A GLYCINE

The GlyCatTM process offers a simple and effective method to reduce cyanide consumption caused by the presence of copper in gold ores and concentrat Reusable glycine is added to the leach to enable a 5-to-10-fold reduction in cyanide usage for the same copper feed concentration in order to yield similar gold extractions Copper is recovered by either sulphide ,...

Gold and copper leaching from gold

Cyanide Gold recovery Leaching Gold-copper ores and concentrates 1 Introduction To extract precious metals from gold-copper ores and concentrates, thepresence of copper minerals has detrimentaleffects ongold extrac-tion unless high cyanide should be added to keep CN Cu molar ratio above 4 For every 1 of reactive copper present about 30 kg/t NaCN...

Eliminating Copper from Gold Ore

11-10-2015 0183 32 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 gold2,3,4 Here is a summary of laboratory investigations on the use of cyanide solutions as extractants for copper from various copper ,...

PDF Industrial Application of Ammonia Assisted Cyanide ,

In this study, the extraction of gold from a copper-bearing gold ore by ammoniacal cyanide leaching was studied Furthermore, ammonia leaching as a pretreatment process ahead of cyanide leaching ....

Industrial application of ammonia

01-09-2018 0183 32 The use of ammonia to reduce the consumption of cyanide during the leaching of gold from copper-bearing ores was patented in 1902 by Hunt 1902 , during the first period of intense R D activity in gold metallurgy that followed the invention of the cyanide process by JS MacArthur and the Forrest brothers in the late 1880s...

Treatment of A Copper

Pretreatment of the ore by ammonia The evaluation of the experimental data using leaching is found to remove reactive copper 73 , dissolution of copper as the response shows that leading to ready extraction of gold 998 in subsequent increasing the concentration of NaCN and NH3 has a cyanide leaching even at low cyanide levels 15 g/L positive synergistic ,...

Treatment of copper

01-02-2015 0183 32 Compared with the traditional cyanide leaching, ammonia cyanide system allows selective leaching of gold from copper-gold ores with remarkably reduced consumption of cyanide 18 It is a rather complex system intimately controlled by ,...

Research on leaching of carbonaceous gold ore with copper ,

15-06-2019 0183 32 For carbonaceous gold ore and its concentrates, gold extraction by direct cyanidation is usually low due to the known preg-robbing effect The leaching behavior of a carbonaceous gold ore with a high content of dolomite in copper-ammonia-thiosulfate solutions was investigated...

Cyanide Leaching Chemistry Gold Cyanidation

06-02-2015 0183 32 Cyanide Leaching Chemistry In a relatively simple system of this type the gold dissolves readily The only requirements are that the gold be free and clean, that the cyanide solution contain no impurities that might inhibit the reaction, and that an adequate supply of oxygen be present in the solution throughout the reaction period...