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treatment of refractory ores

Refractory Gold Ore Treatment Methods

Metallurgical ContentGold Leaching & Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory

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Treatment of Refractory Gold Ores SpringerLink

The treatment of refractory gold ores containing carbonaceous material and sulfides. In Gold and Silver Leaching: Recovery and Economics,edited by W. J. Schlitt, W. C. Larson, and J. B. Hiskey. New York: SME-AIME, 17–22.

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Treatment of carbonaceous refractory gold ores ScienceDirect

In addition the paper describes the various pre-cyanidation treatment methods for carbonaceous refractory gold ores namely, (1) flotation and depression, (2) blanking, (3) the use of activated carbon or resin in leach, (4) roasting, (5) chemical oxidation and (6) bioleaching.

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Treatment of carbonaceous refractory gold ores ScienceDirect

Jan 01, 1991· Refractory ore treatment by this method normally gives gold extraction in excess of 95%. Autoclave leaching of refractory gold ores on an industrial scale started in the 1980's because of the high gold price and because pressure oxidation is an environmentally accepted alternative to roasting.

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The Treatment Of Refractory Ores

apparatus for the treatment of refractory ores. Quantities of refractory ores treated by this process are said to have demonstrated that the whole of the gold in the ore is extracted. The successful outcome of these trials is stated to have resulted in the Anglo-French Exploration Co. acquiring the right to work the process on the various gold

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Treatment of refractory gold: more sustainable gold ounces

Aug 19, 2020· This innovative solution for the treatment of refractory gold ores significantly reduces cyanide consumption, and therefore costs, in

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ALTA Gold 2012 E-Doc Home Albion Process

options for treating more complex orebodies as the less refractory ores become depleted. Demonstration of economic treatment options allows gold companies to maintain and increase their ore reserves. Refractory gold ores are those that do not yield high gold recoveries in conventional cyanide- leaching circuits, even when the ore is finely

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refractory gold ore

Refractory gold ore pretreatment Treatment of refractory gold ore (whole ore and flotation concentrates) has become more prominent since the 1980s, with many gold discoveries often including ores that are wholly or partially refractory. Refractory pre treatment processes include pressure oxidation, biological oxidation and various forms of

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The Treatment Of Refractory Ores

apparatus for the treatment of refractory ores. Quantities of refractory ores treated by this process are said to have demonstrated that the whole of the gold in the ore is extracted. The successful outcome of these trials is stated to have resulted in the Anglo-French Exploration Co. acquiring the right to work the process on the various gold

More

ALTA Gold 2012 E-Doc Home Albion Process

options for treating more complex orebodies as the less refractory ores become depleted. Demonstration of economic treatment options allows gold companies to maintain and increase their ore reserves. Refractory gold ores are those that do not yield high gold recoveries in conventional cyanide- leaching circuits, even when the ore is finely

More

refractory gold ore

Refractory gold ore pretreatment Treatment of refractory gold ore (whole ore and flotation concentrates) has become more prominent since the 1980s, with many gold discoveries often including ores that are wholly or partially refractory. Refractory pre treatment processes include pressure oxidation, biological oxidation and various forms of

More

Gold extraction Wikipedia

A "refractory" gold ore is an ore that has ultra fine gold particles disseminated throughout its gold occluded minerals. These ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes. These refractory ores require pre-treatment in order for cyanidation to be effective in recovery of the gold.

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ECONOMICS OF REFRACTORY GOLD ORE PROCESSES

A number of processes have been applied to the treatment of refractory ores and concentrates. These include: Alkaline air oxidation Chlorination Chlorination and alkaline air oxidation tend to be the lowest capital cost pretreatment methods, and in cases of ores with very low sulfide content, they also can have very low operating costs.

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(PDF) Bacterial leaching as a pre-treatment step for gold

Lawrence R.W., 1994, Biooxidation for the treatment of refractory gold ores and concentrates. A Canadian perspective, CIM Bulletin, 87, 58–65. LAWRENCE R.W., BRUYNESTEYN A., 1983, Biological pre-oxidation to enhance gold and silver recovery from refractory pyritic ores and concentrates, CIM Bulletin, 76, 107–110.

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Refractory Gold SGS

In assessing the economic benefit of the extra processing that needs to be done to improve recovery from refractory or partially refractory ores, it is always important to consider the incremental improvement in gold recovery versus standard grinding and cyanidation, and the incremental increase in costs to achieve this improvement.

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pretreatment of refractory ores in gold leaching process congo

Refractory Gold Ore Treatment Methods. In the biooxidation process, bacteria partially oxidize the sulfide coating covering the gold microparticles in ores and concentrates. In this way, gold recovery from refractory minerals can increase from 15-30% to 85-95%. In the last 15 years at least ten large-scale commercial gold processing units have

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Bacterial oxidation Wikipedia

Bacteria biooxidation is an oxidation process caused by microbes where the valuable metal remains (but becomes enriched) in the solid phase. In this process, the metal remains in the solid phase and the liquid can be discarded. Bacterial oxidation is a biohydrometallurgical process developed for pre-cyanidation treatment of refractory gold ores or concentrates.

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copper extraction refractory gold processes

Gold Mining Process Development Denver Mineral . Coppergold ores that require uneconomically high quantities of cyanide to process due to the solubility of copper in cyanide a multitude of other unfavorable constituents including pyrrhotite, tellurides, antimony, and arsenic it should be noted that most of the refractory ore treatment processes are

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Leaching characteristics of copper refractory ore in

Refractory copper ores (CROs) in central Africa contain copper minerals that are locked up in a micacious solid matrix or associated with carbonate, sulfide and phosphate minerals. Several researchers have reported that the recovery of copper from CRO material by an acid-leaching process is not economically feasible, due to the presence of excess gangue-acid-consuming

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US4923510A Treatment of refractory carbonaceous sulfide

Refractory carbonaceous sulfide ores are treated in a manner so as to improve gold recovery by a treatment in specific combination of steps whereby the ore is treated with chlorine after pretreatment and before cyanidation; the particular steps in the treatment of the ore have been found to be necessary as the conventional pretreatment will not improve the yields on any

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Treatment of refractory carbonaceous sulfide ores for gold

Refractory carbonaceous sulfide ores are treated in a manner so as to improve gold recovery by a treatment in specific combination of steps whereby the ore is treated with chlorine after pretreatment and before cyanidation; the particular steps in the treatment of the ore have been found to be necessary as the conventional pretreatment will not improve the yields on any

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POX Oxidation of refractory gold ore Hydrometallurgy

Hi as you know one of the method for treatment of refractory gold ore is POX. could you please explain about the limitation of S content in the concentrate? because I found in a Chinese text that the maximum content of S in the sulfide concentrate not be more than 10%. if it is true, please tell

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