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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

  • 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

  • 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.

  • 17 Flotation of Gold Ores Aalto

    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 iron oxides, galena, arsenopyrite or copper oxides. The thickness of the layer may be of the order of 1–5 µm. Because of this, the flotation

  • The influence of the oxidation state of pyrite and

    Dec 01, 2002· A Brazilian mining company processes a very low grade gold ore, part as free gold particles and part associated with pyrite and arsenopyrite. The flotation of free gold and sulphides play an important role in this process allowing economic gold production from ores

  • 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.

  • (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

  • 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

  • Arsenopyrite an overview ScienceDirect Topics

    Flotation of Gold Ores. Srdjan M. Bulatovic, in Handbook of Flotation Reagents: Chemistry, Theory and Practice, 2010. 17.9 Flotation of Gold–Antimony Ores. Gold–antimony ores usually contain stibnite (1.5–4.0% Sb), pyrite, arsenopyrite, gold (1.5–3.0 g/t) and silver (40–150 g/t). Several plants in the United States (i.e. Stibnite

  • Pyrite Flotation Froth Flotation (Sulphide & Oxide

    Can you list the factors affects the floatability of pyrite from refractory low grade ore.I used a Wemco lab flotation cell and aimed on analysing factors like collector dosages (PAX), Activator (Copper sulphate),MIBC,pH and others like pulp density and particle size (70 and 150 microns) .However

  • (PDF) Bulk flotation of auriferous pyrite and arsenopyrite

    Gold-bearing pyrite and arsenopyrite account for a considerable proportion of refractory gold-bearing sulfide ores. Gold can be recovered through bulk flotation or selective flotation processes

  • Flotation of Arsenopyrite from Gold Ore

    The pure arsenopyrite sample was obtained from Wards Science Establishment Inc. It was a lump of high pure mineral, which was associated with some quartz. The sample was first crushed and sieved to -2 mm using jaw crusher, double-roll crusher and screens. Then the sample was ground to -120+38µm and -38µm fractions using dry ceramic mill. Finally the quartz and other gangue in the sample were

  • FR2620353A1 Flotation method for a mixture of ores

    Flotation process of a mixture of minerals jointly containing arsenopyrite and pyrite for the purpose of separating these two products from each other, in which a flotation of said mixture is carried out using a collector of sulphides and operating in the presence of a modifier which, depending on the operating conditions, acts as a depressant for one of said pyrites. </P> <P> Said modifier

  • EP0568672B1 Flotation separation of arsenopyrite from

    Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO3- 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

  • 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

  • (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

  • 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

  • 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

  • Pyrite Flotation Froth Flotation (Sulphide & Oxide

    Can you list the factors affects the floatability of pyrite from refractory low grade ore.I used a Wemco lab flotation cell and aimed on analysing factors like collector dosages (PAX), Activator (Copper sulphate),MIBC,pH and others like pulp density and particle size (70 and 150 microns) .However

  • Arsenopyrite Gold Recovery Mineral Processing & Metallurgy

    Metallurgical ContentHow to Recover Gold from ArsenopyriteExperimental Procedure and ResultsPreliminary Cyanide LeachUpflow Percolation LeachCarbon Adsorption Treatment of Pregnant Cyanide SolutionCyanidation Carbon Adsorption Having some arsenopyrite in your gold ore sample does not insure a full refractory gold processes is needed for recovery. The presence of arsenopyrite

  • 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.

  • Flotation of pyrite and arsenopyrite at alkaline pH OneMine

    Leaching of Dominican gold ores in iodide-catalysed thiocyan Extension of mathematical model of a crusher to an impactor Reducing the iron content of kaolin from Milos, Greece, by a Kinetics of Cu(II) adsorption by Penicillium sp. Flotation of pyrite and arsenopyrite at alkaline pH