double refractory gold ore

Double-Refractory Carbonaceous Sulfidic Gold Ores ...

2016-1-1  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 ...

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Microwave pretreatment of a double refractory gold ore ...

2007-9-1  A low-grade sample of a double refractory gold ore was obtained from Barrick Gold Strike. Two kilograms of the ore was mixed with 850 ml of tap water and ground for an hour in a mild steel rod mill with stainless steel rods (23 rods with a mass of 16.4 kg) to achieve 95% −75 μm (80% passing size, P 80 , 42 μm).

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Bio-Oxidation of a Double Refractory Gold Ore and ...

Carbonaceous sulfidic gold ores are commonly double refractory and thus require pretreatment before gold extraction. In this paper, the capacity of pre-bio-oxidation can simultaneously decompose sulfides or deactivate carbonaceous matters (CM) from a double refractory gold ore (DRGO) using pure cultures of A. ferrooxidans or L. ferrooxidans, and a mixed culture

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MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY

2010-1-19  In this study, microbial pre-treatment of double refractory gold ore (sample A) and concentrate (sample B) was investigated using a white-rot fungus, Tramestes versicolor (ATTC 20869). Pulp density, temperature, pH and retention times were the process variables considered.

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Extraction of Gold from a Low-Grade Double Refractory

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...

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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

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Study on the Gold Recovery of Double Refractory Gold Ore ...

Study on the Gold Recovery of Double Refractory Gold Ore Concentrate by Biological Oxidation Pretreatment. Article Preview. Abstract: In this paper, Bacterial oxidation-cyanide leaching experiments were carried out and the carbonaceous substances composition of carbonaceous gold concentrate was been studied. The elemental composition was 9.73 % ...

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Bio-Oxidation of a Double Refractory Gold Ore and ...

2020-9-10  Carbonaceous sulfidic gold ores are commonly double refractory and thus require pretreatment before gold extraction. In this paper, the capacity of pre-bio-oxidation can simultaneously decompose sulfides or deactivate carbonaceous matters (CM) from ...

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Refractory Gold Ore Treatment Methods

2016-7-14  Metallurgical ContentGold Leaching Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from

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(PDF) Cyanidation of Refractory Gold Ores: A Review

2022-1-6  In this paper, the effect of the oxidative pretreatment and lead nitrate addition on the cyanidation of Zarshuran refractory gold ore containing 3.32

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Double-Refractory Carbonaceous Sulfidic Gold Ores ...

Gold ore refers to refractory carbonaceous arsenic-containing sulfide ores. The gravity concentration of ore was assessed using a laboratory 3

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MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY

2010-1-19  In this study, microbial pre-treatment of double refractory gold ore (sample A) and concentrate (sample B) was investigated using a white-rot fungus, Tramestes versicolor (ATTC 20869). Pulp density, temperature, pH and retention times were the process variables considered.

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Microbial pre-treatment of double refractory gold ores ...

A double refractory gold ore usually contains both sulfide minerals and carbonaceous matter and results in very low gold extraction. The micro-sized gold

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Study on the Gold Recovery of Double Refractory Gold Ore ...

Study on the Gold Recovery of Double Refractory Gold Ore Concentrate by Biological Oxidation Pretreatment. Article Preview. Abstract: In this paper, Bacterial oxidation-cyanide leaching experiments were carried out and the carbonaceous substances composition of carbonaceous gold concentrate was been studied. The elemental composition was 9.73 % ...

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Minerals Free Full-Text Significance of Acid Washing ...

2021-11-25  The double refractory gold ore (DRGO) used in this work was a part of the flotation concentrate obtained from the Syama mine in Mali, West Africa. Elemental compositions of DRGO were determined by X-ray fluorescence (XRF) spectroscopy (Rigaku, ZSX Primus II, Akishima, Japan) and CHN analysis (Yanaco CHN MT-5, Kyoto, Japan).

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Transformation of the carbonaceous matter in double ...

2019-9-1  Sulfides and carbonaceous matter in double refractory gold ore (DRGO) were bio-treated sequentially using an iron-oxidizing archaeon Acidianus brierleyi followed by lignin peroxidase-dominating crude enzymes released from the white-rot fungus Phanerochaete chrysosporium to significantly improve gold recovery from 24% to 92%. Transformation of the

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Bio-Oxidation of a Double Refractory Gold Ore and ...

2020-9-10  Carbonaceous sulfidic gold ores are commonly double refractory and thus require pretreatment before gold extraction. In this paper, the capacity of pre-bio-oxidation can simultaneously decompose sulfides or deactivate carbonaceous matters (CM) from ...

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Refractory Gold Ore Treatment Methods

2016-7-14  Metallurgical ContentGold Leaching Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore

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杨洪英

2019-1-18  (22) Study on the Gold Recovery of Double Refractory Gold Ore Concentrate by Biological Oxidation Pretreatment, Advanced Materials Research Vol. 1130 (2015): 379-381. ( EI 收录) (23) Electrochemical Research on N-Type and P-Type Semiconductor;

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Double-Refractory Carbonaceous Sulfidic Gold Ores ...

Gold ore refers to refractory carbonaceous arsenic-containing sulfide ores. The gravity concentration of ore was assessed using a laboratory 3

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MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY

2010-1-19  In this study, microbial pre-treatment of double refractory gold ore (sample A) and concentrate (sample B) was investigated using a white-rot fungus, Tramestes versicolor (ATTC 20869). Pulp density, temperature, pH and retention times were the process variables considered.

More

Microbial pre-treatment of double refractory gold ores ...

A double refractory gold ore usually contains both sulfide minerals and carbonaceous matter and results in very low gold extraction. The micro-sized gold

More

Minerals Free Full-Text Significance of Acid Washing ...

2021-11-25  The double refractory gold ore (DRGO) used in this work was a part of the flotation concentrate obtained from the Syama mine in Mali, West Africa. Elemental compositions of DRGO were determined by X-ray fluorescence (XRF) spectroscopy (Rigaku, ZSX Primus II, Akishima, Japan) and CHN analysis (Yanaco CHN MT-5, Kyoto, Japan).

More

Study on the Gold Recovery of Double Refractory Gold Ore ...

Study on the Gold Recovery of Double Refractory Gold Ore Concentrate by Biological Oxidation Pretreatment. Article Preview. Abstract: In this paper, Bacterial oxidation-cyanide leaching experiments were carried out and the carbonaceous substances composition of carbonaceous gold concentrate was been studied. The elemental composition was 9.73 % ...

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Process Mineralogy of Low-Grade Double Refractory Gold ...

Abstract: The samples used were from a gold mine in Yunnan Province,which are all of the typical of low-grade double refractory gold ore containing 2.4 g/t Au,0.97 wt% As and 1.47 wt% C.The leaching rate of gold as a result of flotation concentrates and extraction by cyanidation is 10.43%,and it becomes 46.52% if the extraction process is roasting-cyanidation,which is thus

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Amursk POX-2 Polymetal

The key to double refractory ore. Double refractory ore concentrate contain ore micron gold particles encapsulated in sulfides (pyrites and arsenic pyrites) together with high concentrations of organic carbon, that is why conventional methods such as cyanidation or

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Gold processing 101 - Mining Magazine

2017-9-7  In the case of Goldstrike, this was a double-refractory ore combining sulphide-occluded gold with preg-robbing carbonaceous material that rendered the ore unsuitable for conventional cyanide leaching and carbon adsorption.

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杨洪英

2019-1-18  (22) Study on the Gold Recovery of Double Refractory Gold Ore Concentrate by Biological Oxidation Pretreatment, Advanced Materials Research Vol. 1130 (2015): 379-381. ( EI 收录) (23) Electrochemical Research on N-Type and P-Type Semiconductor;

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Gold-PM Conference

2017-6-28  More ore bodies have been found where the gold is not amenable to simple cyanidation alone. In the simplest of terms, these are refractory ores. The best choice of a processing route to treat a refractory ore will in most cases be site specific, due mainly to the metallurgical and mineralogical characteristics of the ore.

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