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Review Pretreatment Process on Refractory Gold Ores

mainly about the refractory gold leaching easily through arsenic removal to expose gold, changing the composition, physic-chemical and electro-chemical properties of the ore. Currently, there are four main methods of pretreatments of refractory gold ores with As. Pretreatment options for deal-ing with refractory gold ores are illustrated in Fig ...

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ALTA Gold 2012 E-Doc

2017-12-20  different methods of pretreatment were prepared and these estimated costs and ore sulfide grades then used to compare the process economics. The Study involved the following activities: • Review existing mineralogy and testwork data. • Review possible refractory gold flowsheets. • Conduct a preliminary comparative assessment of the options.

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Pretreatment Process on Refractory Gold Ores with As

The process of crushing or decomposition before gold leaching is called pretreatment of refractory gold. Statistics show that, in the world, about 2/3 gold resource belongs to the difficult processing ores, and about 1/3 total output of world gold is produced from refractory gold. This

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Sulphidic refractory gold ore pre-treatment by selective ...

2013-3-1  Often, the gold bearing ores are refractory due to the gold grains and concentration by flotation is necessary, either followed by roasting, bacterial leaching, or pressure leaching in a way that the gold is liberated prior to cyanidation.

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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 ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold

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Sulphidic refractory gold ore pre-treatment by selective ...

A high carbon low-grade gold ore, in which gold mainly occurs in carbonaceous matters, is a typical refractory gold ore whose conventional cyanide leaching extraction is only 12.9 %.

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MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY

2020-3-24  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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Mineralogy and Pretreatment of a Refractory Gold Deposit ...

The grade and recovery of gold in the flotation concentrates were 49.44 g/t and 33.36%, respectively. The total recovery of gold was 90.94%. The gravity–flotation combined beneficiation pretreatment process provided a feasible method for the refractory gold ore and ensured the effective recovery of gold.

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Improved gold and silver extraction from a refractory ...

2011-1-1  The pretreatment of an antimonial refractory gold and silver ore was investigated using alkaline sulphide leaching. The ore assayed 20 g/t Au and 220 g/t Ag and contained predominantly quartz/clay and barite, and to a lesser extent, sulphides such as pyrite, stibnite, sphalerite, zinkenite (Pb 9 Sb 22 S 42) and andorite (Sb 3 PbAgS 6).The latter mineral was identified to be the most important ...

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Optimizing the alkaline oxidation pretreatment of a ...

2020-5-14  Optimizing the alkaline oxidation pretreatment of a refractory gold ore using taguchi orthogonal array method To cite this article: Foad Mahmoodi and Asghar Azizi 2018 Mater. Res. Express 5 126516 View the article online for updates and enhancements. Recent citations Synergistic effect of reduction leaching of manganese anode slime and oxidation

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refractory ore gold and pretreatment 2012

2011-6-12  refractory ore gold and pretreatment 2012 in Korea ... Pretreatment of refractory ores prior to gold leaching . ECONOMICS OF REFRACTORY GOLD ORE PROCESSES Refractory gold ore pretreatment processes continue to and cooled to 40 C prior to Pretreatment total 6.868.332.85 8.97 Leach-ClP Pretreatment

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Mineralogy and Pretreatment of a Refractory Gold Deposit ...

The grade and recovery of gold in the flotation concentrates were 49.44 g/t and 33.36%, respectively. The total recovery of gold was 90.94%. The gravity–flotation combined beneficiation pretreatment process provided a feasible method for the refractory gold ore and ensured the effective recovery of gold.

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A Preliminary Study on Nitric Acid Pre-treatment of ...

refractory silver ore and gold/silver concentrate resulted in low extractions of only ≤71% over 24 h. After nitric acid pretreatment, the extraction of gold and silver from both materials

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ALTA Gold 2012 E-Doc

2017-12-20  different methods of pretreatment were prepared and these estimated costs and ore sulfide grades then used to compare the process economics. The Study involved the following activities: • Review existing mineralogy and testwork data. • Review possible refractory gold flowsheets. • Conduct a preliminary comparative assessment of the options.

Get Price

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 ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold

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Alkaline sulfide pretreatment of an antimonial refractory ...

This paper presents the alkaline sulfide pretreatment of an antimonial refractory gold and silver ore. In the ore, gold occurs mainly as gold-silver alloys and as associated with quartz and framboidal pyrite grains, and, to a small extent, as the inclusions within antimonial sulfides. Silver is

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MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY

2020-3-24  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.

Get Price

Gold recovery from refractory gold concentrates by ...

2019-3-1  Due to the depletion of high-grade gold ores with large-scale gold ore mining, the attention of gold production enterprises is switching towards refractory gold ores gradually (Karamanev et al., 2001; Zhu et al., 2012). There are two reasons for refractory of gold: (a) The content of organic carbon in the ores is higher

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MODELING OF HIGH PRESSURE PRETREATMENT

2018-10-22  Keywords: pretreatment process, pressure oxidation, refractory gold ore and concentrate, leaching, modeling Investigation of high pressure pretreatment process for gold leaching is the objective of the present master's thesis. The gold ores and concentrates which cannot be easily treated by leaching process are called "refractory".

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Effect of Pretreatment of Sulfide Refractory Concentrate ...

2013-12-24  gold in iron sulfide minerals such as pyrite and arsenopy- rite. Such deposits are called refractory gold ores due to the encapsulation of fine particles of gold in the ore host. A clear boundary between refractory and non-refractory ore in terms of gold recovery is not well defined, but several authors have pointed out that less than 60% gold

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Fungal pretreatment of sulfides in refractory gold ores ...

title = "Fungal pretreatment of sulfides in refractory gold ores", abstract = "This study assessed the capability of the fungus, Phanerochaete chrysosporium, to decompose pyrite, arsenopyrite and a sulfide-containing flotation concentrate in an effort to develop a microbial process for pretreating refractory gold

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Microwave pretreatment of a double refractory gold ore ...

Microwave pretreatment of a double refractory gold ore. Abstract 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 ...

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Alkaline sulfide pretreatment of an antimonial refractory ...

This paper presents the alkaline sulfide pretreatment of an antimonial refractory gold and silver ore. In the ore, gold occurs mainly as gold-silver alloys and as associated with quartz and framboidal pyrite grains, and, to a small extent, as the inclusions within antimonial sulfides. Silver is present extensively as antimonial sulfides such as andorite.

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MODELING OF HIGH PRESSURE PRETREATMENT

2018-10-22  Keywords: pretreatment process, pressure oxidation, refractory gold ore and concentrate, leaching, modeling Investigation of high pressure pretreatment process for gold leaching is the objective of the present master's thesis. The gold ores and concentrates which cannot be easily treated by leaching process are called "refractory".

Get Price

Improvement of Gold Leaching from a Refractory Gold ...

2017-7-31  energy consumption. As a result, proper pretreatments are necessary to improve the leaching of gold from these refractory gold ores [5,6]. The pretreatment of oxidative roasting has always been one of the most extensively used methods in China attributing to its mature technique, high efficiency, energy conservation, etc. [7,8] Effective

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Gold recovery from refractory gold concentrates by ...

2019-3-1  Due to the depletion of high-grade gold ores with large-scale gold ore mining, the attention of gold production enterprises is switching towards refractory gold ores gradually (Karamanev et al., 2001; Zhu et al., 2012). There are two reasons for refractory of gold: (a) The content of

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Testing Refractory Gold Ore - 911metallurgist

2018-5-3  Refractory Ore Pretreatment Processes. A “fine” grind in a gold production plant might produce a particle size distribution in which 80% of the ore is finer than 44 µm. Ultra-fine grinding can be defined as a process that produces an 80% passing size of 20 µm or less. Depending on the size distribution of gold particles, ultra-fine ...

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© University of Science and Technology Beijing and ...

2021-4-27  to realize efficient contact of the gold and cyanide solution by grinding. Therefore, it is particularly important to pretreat refractory gold ore for increasing the leaching rate [5-7]. In the existing technical conditions, pretreatment of refractory gold ore is usually carried out by calcination, wet chemical, pressurized oxidation and biological

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Effect of Pretreatment of Sulfide Refractory Concentrate ...

2013-12-24  gold in iron sulfide minerals such as pyrite and arsenopy- rite. Such deposits are called refractory gold ores due to the encapsulation of fine particles of gold in the ore host. A clear boundary between refractory and non-refractory ore in terms of gold recovery is not well defined, but several authors have pointed out that less than 60% gold

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Refractory Gold Technology

2020-1-20  Refractory Gold Technology Sherritt’s Refractory Gold Technology is used to recover gold from refractory sulphide feedstocks. Many gold ores and concentrates contain fine grained gold locked within sulphide minerals, such as pyrite and/or arsenopyrite, unavailable for recovery by conventional leaching. In Sherritt’s gold process, the ...

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