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flotation of gold ores in pyrite and arsenopyrite

Gold Ore an overview ScienceDirect Topics

Pyrite, if present in an arsenical gold ore, may contain some gold as minute inclusions. Flotation of arsenical gold ores associated with base metals is accomplished using a sequential flotation technique, with flotation of base metals followed by flotation of gold-containing pyrite/arsenopyrite.

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17 Flotation of Gold Ores

Hydrothermal This type contains a variety of ores, including(a) gold-pyrite ores, (b) gold-copper ores, (c) gold-polymetallic ores and (d) gold oxide ore, usually upper zone of sulphide zones. The pyrite content of the ore varies from 3% to 90%. Other common

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Gold Pyrite, Pyrrhotite and Arsenopyrite Recovery

One of the more common classes of ores containing gold is when gold is associated with pyrite, pyrrhotite, and arsenopyrite. This is the area of gold recovery that has probably received the most research and plant optimization support especially in light of the long history of South African industrial practice. From a reagent viewpoint, charged water soluble collectors such as xanthates

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Arsenopyrite an overview ScienceDirect Topics

For sulfide ores (usually pyrite or arsenopyrite based), flotation is often the first step after grinding to recover a gold-rich concentrate (see Chapter 20 for more details). The tail from flotation may advance to a CIL circuit while the concentrate is usually subjected to fine grinding or oxidation prior to leaching and gold

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Arsenopyrite-Pyrite Association in an Orogenic Gold Ore

Micron-scale (2–10 μm) remobilized gold is accompanied by fine particles (200 nm–2 μm) and nanoparticles (<200 nm) of gold. The extensive variation of Au concentrations within single arsenopyrite grains underlines the significance of textures when using trace element data to understand how gold ores

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Specific Refractory Gold Flotation and Bio-Oxidation

Jan 19, 2021· The greater gold-pyrite association in JF, despite the higher gold-arsenopyrite association in its corresponding flotation concentrate (DC) is consistent with the literature . For instance, it is well known that bio-oxidation is more effective in oxidising arsenopyrite minerals which display ease for oxidation by the chemolithotrophic bacteria.

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Gold with Pyrite, Pyrrhotite, Marcasite and Arsenopyrite

Apr 17, 2016· Gold with Arsenopyrite Arsenic Minerals Gold is occasionally associated with arsenic minerals as well as pyrite, stibnite, chalcopyrite, etc. Direct cyanidation in these cases is seldom possible. Additionally, when gold is associated with readily soluble arsenic compounds, there is the hazard, in precipitation, of forming arsine, AsH3.

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Effect of Collector Type and Blends on Mixed Pyrite and

Gold in refractory ores are preferentially associated with pyrite and arsenopyrite (Arehart et al., 1993, McCarthy et al., 2018, Zhang et al., 2016, Asamoah et al., 2019b, Asamoah et al., 2019a). To produce an enriched feed for downstream processing, froth flotation is often used to produce a concentrate of gold-bearing pyrite, arsenian pyrite

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Arsenopyrite Flotation & Depression Arsenopyrite Rejection

Flotation and depression control of arsenopyrite through pH and xanthate as the collector. Arsenopyrite Rejection

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Ask The Experts How do I recover gold in pyrite? ICMJs

It is microscopic and is found inside the pyrite crystal. Miners who process gold ores will get free gold particles that can be melted into bars, but they also recover pyrite that has small amounts of gold within it. Often the majority of the gold is in the free particles, but sometimes the pyrite can also contain important amounts of gold.

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Gold-Pyrite ores

Where the gold is intimately associated with various sulphide minerals, especially iron sulphides which include pyrite, arsenopyrite and pyrrhotite, flotation recovery of the gold is dependent on recovery of the associated minerals. In this case gold follows the associated sulphide mineral recovery.

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Gold with Pyrite, Pyrrhotite, Marcasite and Arsenopyrite

Apr 17, 2016· Gold with Arsenopyrite Arsenic Minerals Gold is occasionally associated with arsenic minerals as well as pyrite, stibnite, chalcopyrite, etc. Direct cyanidation in these cases is seldom possible. Additionally, when gold is associated with readily soluble arsenic compounds, there is the hazard, in precipitation, of forming arsine, AsH3.

More

Effect of Collector Type and Blends on Mixed Pyrite and

Gold in refractory ores are preferentially associated with pyrite and arsenopyrite (Arehart et al., 1993, McCarthy et al., 2018, Zhang et al., 2016, Asamoah et al., 2019b, Asamoah et al., 2019a). To produce an enriched feed for downstream processing, froth flotation is often used to produce a concentrate of gold-bearing pyrite, arsenian pyrite

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Gold and arsenic in pyrite, Geology and gold on Otago's

Laser ablation ICP-MS images of a pyrite grain (1 mm across) from the Macraes gold mine. Left image shows gold concentration: red spots are gold inclusions; green patches are pyrite with gold content between 1 and 10 parts per million. Right image shows the arsenic content of the same grain.

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Establishing thE ProcEss MinEralogy of gold orEs

occurs mainly as submicroscopic gold in arsenopyrite and pyrite and is recovered by roasting a flotation concentrate followed by cyanidation (Wang et al., 1994). gold orEs and MinErals According to the mode of occurrence, gold is classified as three categories: microscopic gold, submicroscopic gold and surface-bound gold (Table 2). Gold

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ALTA Gold 2012 E-Doc Albion Process

The majority of gold ores are classified refractory because the gold mineralogy is contained in sulphides. This type of gold is typically very fine gold or locked in solid solution within sulphide minerals pyrite and arsenopyrite (FeAsS). The arsenic bearing pyrite is commonly known as arsenian pyrite and can contain gold in its structure.

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ARSENOPYRITE ENRICHMENT BY COLUMN FLOTATION

ARSENOPYRITE ENRICHMENT BY COLUMN FLOTATION P. MAVROS, K.A. KYDROS and K.A. MATIS Department of Chemistry, Aristotle University, GR-540 06 Thessaloniki, Greece (Received 4 February 1993; accepted 2 July 1993) ABSTRACT Arsenic-rich, gold-bearing pyrite concentrates may be further enriched in arsenic W assist

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US5171428A Flotation separation of arsenopyrite from

Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO 3 ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to the arsenopyrite. On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate rich in pyrite and tailings

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(PDF) A Brief Review of Auriferous Sulphide Flotation

Notwithstanding, in the separation of gold bearing sulphides during froth flotation, a concentrate made up of both pyrite and arsenopyrite is obtained due to their similar characteristics and

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Ask The Experts How do I recover gold in pyrite? ICMJs

It is microscopic and is found inside the pyrite crystal. Miners who process gold ores will get free gold particles that can be melted into bars, but they also recover pyrite that has small amounts of gold within it. Often the majority of the gold is in the free particles, but sometimes the pyrite can also contain important amounts of gold.

More