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Cilt numaras: 25 Konu: 2 Basm Tarihi: 2015 Doi Numaras: /s(15)636421 Dergi Ad: TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA Sayfa Saylar: #214;zet The treatment of a copper sulphidebearing gold ore by direct cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching was investigated.
Gold will be recovered on carbon, eluted and then electrowon to produce a silver/gold dor#233;. Gold recovered from the ILR will be electrowon separately to produce a separate gold dor#233;. Leached tails will be detoxified in an Air and Sulphur Dioxide cyanide destruction circuit, then thickened and pumped to a tailings storage facility (TSF).
Treatment of a CopperRich Gold Ore by Ammonia Assisted Cyanide Leaching. Proceedings of XXVIth International Mineral Processing Congress IMPC 2012 met Deniz Bas, Ersin Y Yazici and Haci Deveci. quot;Treatment of a CopperRich Gold Ore by Ammonia Assisted Cyanide Leachingquot; Proceedings of XXVIth International Mineral Processing Congress IMPC 2012
hellow, I have gold ore which contains high amount of copper. I have heard that apart from flotation I could use ammonia pretreatment to reduce the amount of copper in the ore I have bottle rolling test so I''m asking for the procedures to do the test to see the effectof addition of ammonia
#0183;#32;The application of ammonium thiosulfate for the treatment of coppergold ores has been investigated. Copper minerals and coppergold samples were leached in an ammonium thiosulfate solution under varying experimental conditions, aeration, temperature and reagent addition. The behaviour of thiosulfate, tetrathionate and sulfate in solution was
Cyanidation delivered a gold recovery of % at 2 4 hours of agitation, whereas ammoniacal thiosulfate leaching achieved an % of gold recovery in only one hour of agitation. Then, the ammoniacal thiosulfate solutions obtained were submitted to five gold
Ammonia pretreatment allowed to eliminate the refractoriness of the ore with a substantial improvement in the gold extraction from to % (refer Figure 5). This improvement
#0183;#32;DOI: /S(15)636421 Corpus ID: . Treatment of copperrich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching article{Bas2015TreatmentOC, title={Treatment of copperrich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching}, author={A. D. Bas and Elif Ko#231; and E. Y. Yazici and
This is done by contacting the carbon with a solution of sodium cyanide ( to 2% by mass) and sodium hydroxide ( to 2% by mass) at high temperatures (90120#176;C). This results in the reversal of the adsorption process with most of the gold desorbing from the carbon back into solution.
Treatment of A CopperRich Gold Ore by Cyanide Leaching, Ammonia Pretreatment and Ammoniacal Cyanide Leaching
A low grade copper flotation tailing from Telfer containing % Cu as chalcocite and cuprite and 5 gtt Au was leached with ammonia, cyanide and ammoniacyanide mixtures to extract copper and/or gold. Direct cyanidation extracted both copper and gold but consumed about 30 kgt 1 NaCN. Preleaching the tailing with an aerated ammonia solution containing...
The treatment of a copper sulphidebearing 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.
Therefore, this project investigates the use of ammonia as a pretreatment of oxidised low grade PGM ores. Ammonia leaching has shown success in the extraction of base metals (94% and 91% Cu and Ni extraction) and is used as a wash reagent in an attempt to dissolve the oxidation layer and expose a cleaner mineral surface.
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
Treatment of a Polysulphide Ore by Ammoniacal Thiosulfate Solutions and Ion Flotation for Gold ammonia is present in more quantity than thiosulfate, diamine aurous (I) Agroheart ore so this mineral is viable for gold extraction.
using a longterm ammonia and cyanide column leach of whole ore material. This resulted in 3%, 40% and 73% total extraction of Ni, Pt and Pd, respectively. It was postulated that Fe oxides/hydroxides (10% wt. of the ore), which were not leached by the ammonia, inhibit effective leaching and
When ammoniacal cyanide leaching system was used, the extraction of gold was significantly improved to gt;90%. Similarly, the pretreatment of the ore by ammonia leaching was shown to lead to high
TREATMENT OF A COPPER RICH GOLD ORE BY AMMONIA ASSISTED CYANIDE LEACHING Figure 7. Effect of ammonia pretreatment (1 M NH. 3) and the addition of ammonia ( M NH. 3) on the consumption of NaCN (NaCN: g/L) Ammoniacal Cyanide Leaching . Ammoniacal cyanidation is one of the most promising alternative processes for copperrich gold ores (Muir . et al,
Abstract: The treatment of a copper sulphidebearing 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.
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, BoxBehnken experimental design shows the main and interaction effects of NH 3, NaCN and Pb (NO 3) 2.
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