Double Refractory Gold Ore
Double Refractory Gold Ore
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Double Refractory Gold Ore
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Double Refractory Gold Ore

Refractory Gold Ore Treatment Methods

2019-10-30  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 Process Methods Where gold

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Double-Refractory Carbonaceous Sulfidic Gold Ores -

Ores in which gold is associated with sulfides and with high carbonaceous matter content are considered double refractory. The northern Nevada region in the United States is a main area where this type of ore is found. Ores in the Carlin Trend District are characterized by the presence of submicroscopic gold (invisible gold) finely disseminated within a sulfide-rich matrix (mainly pyrite .

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Cited by: 2

Microwave pretreatment of a double refractory gold ore -

Double refractory gold ores, such as Barrick’s Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide leaching. One possible remedy is to roast the ore and thus oxidize the pyrite and remove the organic carbon.

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Cited by: 88

double refractory gold ores

Microwave pretreatment of a double refractory gold ore One possible remedy is to roast the ore and thus oxidize the pyrite and remove the organic carbon. In this research, microwave roasting of a double refractory gold ore was investigated as an alternative method and the results were compared to those obtained by conventional roasting. >>Chat .

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Extraction of Gold from a Low-Grade Double Refractory

Abstract. The treatment process of a low-grade refractory gold ore containing sulfide minerals and carbonaceous matters was studied in this work. The gold extraction of this ore by all-sliming cyanidation was only 11.75%. Hence, a pretreatment was necessary.

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Cited by: 3

Technology to enhance gold recovery for double refractory

2013-11-14  A new technology to improve gold recovery in the processing of double refractory ores, which often resulted in native carbon competing with activated carbon and limiting gold

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Microwave pretreatment of a double refractory gold ore

Double refractory gold ores, such as Barrick’s Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide leaching. One .

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: B. Nanthakumar, C.A. Pickles, S. Kelebek

US8262768B2 - Method to improve recovery of gold from

The present invention is directed to a precious metal recovery process in which carbonaceous material, such as preg robbing carbon, is floated after sulfide oxidation to separate the carbonaceous material from the precious metal.

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Cited by: 10

Barrick Thiosulfate Leaching of Double Refractory Ore

2019-06-26  Double refractory ores present a unique challenge to the traditional method of gold recovery in mining. Double refractory ores are ores that contain sulfides and carbons, as opposed to single refractory ores which contain only sulfides. In general, the cyanide solution pulls the gold out of the ore and into solution.

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Processing Refractory Gold - Hydrometallurgy: Leaching in

2019-10-23  There are a number of factors that cause refractory behaviour in gold ores. Typically when we start investigating these ores the first step would be to undertake a mineralogical analysis that will tell you if your ore is sulphide refractory (and the grain size you are needing to target for liberation), if you have pregnant solution robbers or if you have a more complex telluride or double .

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Mycohydrometallurgy: Biotransformation of double

A double refractory gold ore usually contains both sulfide minerals and carbonaceous matter and results in very low gold extraction. The micro-sized gold particles are enclosed inside the mineral lattice and cannot be extracted even with very fine grinding. The carbonaceous matter preg-robs gold leading to loss of gold values to the residue.

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ALTA MetBytes - What's Happening in Gold Ore Processing

2019-04-23  double refractory ore has been achieved at Nordgold’s Suzdal mine in Kazakhstan which treats double refractory ore with both visible and invisible gold hosted in sulphide associations of pyrite and arsenopyrite, and also carbonaceous black shale. Following extensive laboratory and demonstration scale testing of the Outotec

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double refractory gold ores

double refractory gold ores - keuken310.nl. double refractory gold ores, such as Barricks Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide leaching. >>Chat Online; Gold Process Mineralogy - sgs.

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Microwave pretreatment of a double refractory gold ore

Download Citation on ResearchGate Microwave pretreatment of a double refractory gold ore Double refractory gold ores, such as Barrick’s Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide leaching. One possible remedy is to roast the ore and thus .

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Gold mineral processing - Hatch Ltd

To complicate matters further, these ore bodies are often refractory, where the gold is locked within sulphide minerals; or double refractory, in which gold is locked within sulphide minerals and preg-robbing due to the presence of organic carbon. These must be pretreated ahead of leaching.

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A FUNDAMENTAL INVESTIGATION OF THE HIGH TEMPERATURE OXIDATION OF GOLD

2018-10-23  presented for treatment. For double refractory gold ores, the most crucial unit operation is performed by the roaster by creating a high temperature oxidation of the ore. An efficient roasting operation creates a leachable ore in the next unit operation by extracting gold in an aqueous solution. A

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US8262768B2 - Method to improve recovery of gold from

The present invention is directed to a precious metal recovery process in which carbonaceous material, such as preg robbing carbon, is floated after sulfide oxidation to separate the carbonaceous material from the precious metal.

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ALTA Gold 2012 E-Doc

2017-12-21  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 ground. The cause of low gold recoveries can be either through the presence of naturally occurring ‘preg robbing’ carbonaceous materials or gold physically ‘locked .

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US20090158893A1 - Microbial pre-treatment of double

The present invention is directed to recovery of gold from refractory and double refractory ores using a fungal agent and/or culture media. US20090158893A1 - Microbial pre-treatment of double refractory gold ores - Google Patents Microbial pre-treatment of double refractory gold ores Download .

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v117n8a4 Evaluation of ozonation technology for gold recovery

2017-09-27  Evaluation of ozonation technology for gold recovery and cyanide management technology for processing of a South African double refractory ore sample which yields a low gold recovery via conventional cyanidation. 3/;+27,4*95)872% Ozone is a powerful oxidant with a high standard oxidation

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US20090158893A1 - Microbial pre-treatment of double

The present invention is directed to recovery of gold from refractory and double refractory ores using a fungal agent and/or culture media. US20090158893A1 - Microbial pre-treatment of double refractory gold ores - Google Patents Microbial pre-treatment of double refractory gold ores Download .

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Gold mineral processing - Hatch Ltd

To complicate matters further, these ore bodies are often refractory, where the gold is locked within sulphide minerals; or double refractory, in which gold is locked within sulphide minerals and preg-robbing due to the presence of organic carbon. These must be pretreated ahead of leaching.

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METHOD TO IMPROVE RECOVERY OF GOLD FROM

2009-03-19  The invention relates generally to recovery of gold and/or silver and particularly to recovery of gold from refractory and double refractory materials. BACKGROUND. Many precious metal deposits currently processed throughout the world are sulfidic in nature, and present challenges in the extraction and recovery of the contained gold.

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A two-stage bacterial pretreatment process for double refractory gold

2019-10-15  carbonaceous matter (CM), the ore is said to be double refractory (Nyavor and Egiebor, 1992). In such ores, gold particles may sometimes be occluded or included in the sulfide minerals and pretreatment is necessary to decompose the mineral structure to liberate gold for subsequent recovery. The CM acts as a preg-robber

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Establishing thE ProcEss MinEralogy of gold orEs

2015-12-16  of refractory gold minerals and locking of submicroscopic gold in sulfide mineral structure etc. Gold process mineralogy helps address issues and problems related to gold ore processing. It provides useful information on process selection, flowsheet development, recovery improvement and reagent consumption optimization.

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Technology options for processing complex and double

The initial results for the cyanide leach gold recoveries were very poor on a high-grade primary sulphide ore of 6.2 g/t Au with no silver. Subsequent mineralogy showed the ore to be a characteristic pyrite, carbonaceous refractory gold ore (double refractory). This was a very disappointing finding. A small scale gravity and flotation test programme.

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Technology to enhance gold recovery for double

2013-11-14  A new technology to improve gold recovery in the processing of double refractory ores, which often resulted in native carbon competing with activated carbon and limiting gold

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Gold extraction - Wikipedia

2019-10-27  Gold extraction refers to the processes required to extract gold from its ores.This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore.. Gold mining from alluvium ores was once achieved by techniques associated with placer mining such as simple gold

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ALTA 2017 Gold-PM Proceedings - ALTA Metallurgical Services

2017-07-03  There was initial excitement at finding a new gold ore body. It was decided to carry out sighter tests on the ore before launching into a major drilling programme. Subsequently exploration drill core samples were prepared and tested in the laboratory to establish if the ore was free milling.

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Gold ore processing : project development and operations

Gold Ore Processing: Project Development and Operations, Second Edition, brings together all the technical aspects relevant to modern gold ore processing, offering a practical perspective that is vital to the successful and responsible development, operation, and closure of any gold ore

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