· 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 2.2 Leaching tests Leaching tests were conducted in baffled glass reactors (1000 mL in nominal capacity) into which leach

 · The treatment of copper sulfide minerals containing a high percentage of oxide copper causes problems in the concentration process, decreasing the copper content. In …

In this paper, the mineralurgical tests carried out on 28 blocks revealed that the copper and the arsenic content in the ore penalize the recovery of Gold (146 ppm for copper and 4710 ppm for Arsenic). The Yalea deposit was emplaced by several hydrothermal phases that reactivated the structures.

The present invention relates to a process of gold and copper recovery from gold-containing copper ores obtained from mixed oxide-sulfide copper ore bodies by a series of flotation stages. More specifically, the present invention relates to a process of gold and copper recovery whereby gold-containing ores obtained from mixed oxide-sulfide copper ore …

 · Ammonia pretreatment is shown to readily eliminate the copper interference, allowing almost complete extraction of gold with concomitantly low reagent consumption …

Anderson, C.G. Treatment of copper ores and concentrates with industrial nitrogen species catalyzed pressure leaching and non-cyanide precious metals recovery. JOM 55, 32–36 (2003). https://doi/10.1007/s11837-003-0085-z Download citation Issue Date April 2003 DOI https://doi/10.1007/s11837-003-0085-z Share this article

 · firstly, proper assay is needed to determine if there is some recoverable gold. most basic thing would be roasting the concentrates to drive off sulfur from sulfides as so2. that way you convert your feedstock to oxides and hopefully (if is present), liberate the gold from sulfide matrix. this roasted concentrate could be then smelted with proper …

 · Scope of application: malachite, cuprite, tenorite, copper mine tailings, etc., except copper ore containing calcium magnesium carbonate gangue. The ore is first leached with a 0.5% to 3% sulfuric acid dilute solution after being ground. (For some ore that is difficult to be leached, it needs to be heated to 45 to 70° C during leaching).

 · The copper flotation tailings were cyanided for 4 hours; 28.9 percent of the total gold and 35.8 percent, of the total silver were extracted, giving overall recoveries of 91.2 percent of the Gold and 97.0 percent of the silver. Cyanide consumption was 4.7 pounds per ton of original ore.

 · The current copper price of above 9 000 USD/t is seen as encouraging miners to boost output. Copper mine production is forecasted to rise by 2..4% in 2021, and by further 7% in 2022 boosted by recovering supply at existing mines, expansions and new capacity in Indonesia (Grasberg Block Cave mine ramp-up), Peru (the startup of Mina Justa and the …

 · The gold-copper concentrate is sent to a smelter for comprehensive recovery; the gold-sulfur concentrate can be leached by cyanidation and then smelted to recover gold. If the gold particle size is relatively coarse, it is also possible to increase the mercury mixing and re-selection operations before flotation to recover the coarse gold.

 · Request PDF | Recovery of gold from copper-rich ores using ion exchange resins https://acikbilim.yok.gov.tr/handle/20.500.12812/476016 | In this study, the treatment ...

This study has shown ammonia pretreatment and ammonia assisted cyanide leaching of a copper-rich gold ore. Ammonia pretreatment prior to cyanide leaching, was found to be effective, with a significant improvement in the extraction of gold from 12.3% to 98.2%, apparently due to the removal of easily soluble copper present in the ore.

Another embodiment provides a process for the recovery of copper and gold wherein ores emanating from mixed oxide-sulfide copper ore bodies undergo at least one flotation stage using a...

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 of gold from a copperbearing gold ore by ammoniacal cyanide leaching was studied. Furthermore, ammonia leaching as a… No Paper Link Available Save to Library

The barren gold solution was then treated by the SART process (sulfidization, acidification, recycle, thickening) for copper recovery as copper sulfide and cyanide recycle. The results of...

 · 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...

 · Partial removal of copper by 42-48% in the pre-leaching stage was achieved. The pre-treatment of the ore substantially improved the extraction of gold in subsequent …

 · The resulting product of the converter treatment is blister copper that contains about 98 % copper. For the refining process, the molten blister copper has to be treated in an anode furnace where excess oxygen is removed by reduction with natural gas.

 · An 80 per cent gold recovery was made by the method of treatment described. It is generally known that antimony can be readily volatilized, and by roasting stibnite (Sb2S2) in an oxidizing atmosphere, …

 · A procedure was developed for recovering gold, silver, cobalt, copper, and zinc from a massive sulfide ore by a hydro-metallurgical process. The procedure consists of (1) oxygen pressure leaching; (2) …

Treatment of Refractory Gold Ores J. C. Yannopoulos Chapter 738 Accesses 3 Citations Abstract Problem ores that yield low (say less than 80%) gold recovery by cyanidation when "normally ground" are defined as refractory. The term, as well as the technical methods used to treat such ores, are relatively new.

 · Before the beneficiation of copper ores, crushing and grinding are required. The bulk ores are crushed to about 12cm by a jaw crusher or a cone crusher. Then the crushed materials are sent to the grinding equipment, and the final particle size of the copper ore is reduced to 0.15-0.2mm. Copper ore crushing process. 1.

 · Therefore, to overcome copper interference, several alternative processes have been suggested. These include flotation, alternative …

 · DOI: 10.1016/S1003-6326(15)63642-1 Corpus ID: 56375473; Treatment of copper-rich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching @article{Ba2015TreatmentOC, title={Treatment of copper-rich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching}, author={Ahmet …

 · Abstract. The application of ammonium thiosulfate for the treatment of copper–gold ores has been investigated. Copper minerals and copper–gold samples were leached in an ammonium thiosulfate ...

 · MUIR et al [8] reported that the ammoniacal cyanide leaching was an effective system for the recovery of gold from a copper-rich tailings (1.2% Cu, 5 g/t Au). They …

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 …

B25 Paper No. 394 TREATMENT OF A COPPER - RICH GOLD ORE BY AMMONIA ASSISTED CYANIDE LEACHING A D Bas1,*, E Y Yazici2 and H Deveci3 ABSTRACT 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.

The common processes for recovery of gold solution includes: (i) Carbon adsorption, Merrill-Crowe process, (iii) electrowinning and (iv) ion-exchange / solvent extraction. Traditionally, Merrill-Crowe process was used to remove gold from a cyanide solution by using zinc dust to precipitate gold from its solution.

Processes for recovering gold from copper-gold ores thiosulfate leaching or gold ores copper catalyzed thiosulfate leaching using ion exchange technology are disclosed. The processes include subjecting the gold-bearing and copper-bearing thiosulfate solution to a pH and/or temperature adjustment to reduce tetrathionate concentration in the thiosulfate solution …

 · In conclusion, ammonium thiosulfate leaching for gold recovery preferably should be performed at: • low thiosulfate concentrations, ranging from 0.1 to 0.2 M; • an …

 · A Review of the Recovery of Gold and Silver From Copper Ores and Concentrates Treatment of Precious Metals From Copper Bearing Tailings Authors: …

Guzman et al. (2010) show that gold recovery during sulphidization is dependent on pH and sulphide dosing, with gold recovery increasing from zero to 23% as the pH is reduced from 4 to 2 and with ...

using the method described herein, gold can be recovered in connection with a chloride leaching process from refractory concentrates, particularly from those containing arsenopyrite and/or pyrite...