study on pretreatment of arsenic containing refractory gold

study on pretreatment of arsenic containing refractory gold

Pretreatment of a refractory arsenopyritic gold ore using ...

Mar 01, 2015  An arsenopyrite refractory ore was pretreated with NaOH to increase gold extraction. After pretreatment, gold and silver were leached with copper ammonium thiosulfate solution. Thiosulfate leaching of the as-received ore extracted only 21% and 29% of silver and gold, respectively. Up to 81% of the gold and 50% of the silver were recovered after ...

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Fungal pretreatment of sulfides in refractory gold ores ...

May 01, 2011  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 ores.The extent of biotransformation was monitored by analyzing for iron, sulfur and arsenic in incubation solutions, and for sulfide

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Fungal pretreatment of sulfides in refractory gold ores ...

May 01, 2011  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 ores. The extent of biotransformation was monitored by analyzing for iron, sulfur and arsenic in incubation ...

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(PDF) Bacterial Leaching as a Pre-treatment Step for Gold ...

In this article, pre-treatment such as bio-leaching before cyanidation is discussed as an alternative technique to treat refractory gold ores containing pyrite and arsenopyrite.

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Study on Pre-oxidation of a High-Arsenic and High-Sulfur ...

高达10%返现  Feb 03, 2020  For arsenic-containing refractory gold concentrate, gold recovery by leaching is extremely difficult due to the encapsulation of gold in arsenopyrite and pyrite. In this work, the pre-oxidation of a high-arsenic and high-sulfur refractory gold concentrate in the acidic potassium permanganate or hydrogen peroxide solutions has been

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Removal of arsenic and sulfur from a refractory gold ...

Jan 01, 2010  This implies that the cyanidation of primary refractory gold ores could be greatly improved with acceptable gold recovery provided that sulfur and arsenic are removed by microwave heating. Therefore, this study investigated the removal of sulfur and arsenic from a refractory flotation gold concentrate by microwave heating. 2. Experimental2.1.

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Arsenic removal strategy in the processing of an ...

Aug 01, 2021  Abstract. In the gold mining industry, the exploitation of low-grade refractory deposits generates effluents with high arsenic concentrations. In this study, an additional stage in the processing of an arsenopyritic refractory gold ore was studied. Arsenic extraction in an alkaline pretreatment was evaluated to avoid metalloid release in the ...

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CYANIDE LEACHING BEHAVIOR OF AN ARSENIC RICH

CYANIDE LEACHING BEHAVIOR OF AN ARSENIC RICH REFRACTORY GOLD ORE Büyüktanır, Karden M.S., Department of Mining Engineering ... performed, it was determined that the ore has a highly refractory structure containing high amounts of cyanicide. It was determined that Au extraction yield increases as the ... pre-treatment, Au extraction from the ...

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Study on Pre-oxidation of a High-Arsenic and High-Sulfur ...

Feb 03, 2020  For arsenic-containing refractory gold concentrate, gold recovery by leaching is extremely difficult due to the encapsulation of gold in arsenopyrite and pyrite. In this work, the pre-oxidation of a high-arsenic and high-sulfur refractory gold concentrate in the acidic potassium permanganate or hydrogen peroxide solutions has been investigated. The studied

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Refractory Gold Ore Treatment Methods

Jul 14, 2016  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 is associated with arsenic

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An evaluation of pretreatments to ... - ScienceDirect

Jan 01, 2000  Evaluation of pretreatments to increase gold recovery from refractory ore 3 Oxidative pretreatments The pyrolysis/roasting (Pyrox) pretreatment was carried out by heating about 5Og of ~75 umre under nitrogen in a furnace at 700 for a period of 30 minutes, followed by heating in air at the same temperature for 3 hours.

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Flowsheet development of a refractory gold ore to minimise ...

Flowsheet development of a refractory gold ore to minimise arsenic issues in the environment. Following the discovery of a major gold resource, discussions with the regulator introduced restrictions on how the ore could be processed. The regulatory requirements necessitated that no arsenic was allowed to migrate into the environment.

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Bacterial Leaching as a Pre-treatment Step ... - ResearchGate

In this article, pre-treatment such as bio-leaching before cyanidation is discussed as an alternative technique to treat refractory gold ores containing pyrite and arsenopyrite.

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Developments in the pretreatment of refractory ... - SAIMM

submicroscopic gold inclusions within sulphide minerals such as arsenopyrite and pyrite. Such ores require a pre-treatment process to alter or destroy the sulphide matrix and render the gold accessible to cyanide and oxygen (Gudyanga et al., 1999). The gold in high-sulphur and high-arsenic refractory gold concentrate (HGC) is encapsulated

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Mineralogy and Pretreatment of a Refractory Gold ... - MDPI

The technological mineralogy of a gold deposit located in North-Western province of Zambia was carried out by using X-ray fluorescence spectroscopy (XRF), X-ray diffraction spectroscopy (XRD), and scanning electron microscope (SEM). The results showed that gold was highly dispersed in gold-bearing minerals such as pyrite, arsenopyrite, and some gangues in the form of natural 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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Removal of arsenic and sulfur from a ... - ResearchGate

In this study the removal of sulfur and arsenic from a refractory flotation gold concentrate by microwave heating was investigated. The results showed

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Effect of Oxidative Pretreatment and Lead Nitrate Addition ...

In this paper, the effect of the oxidative pretreatment and lead nitrate addition on the cyanidation of Zarshuran refractory gold ore containing 3.32 ppm Au, 1.09% As, and 0.5% sulfur were ...

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选矿预处理,中文例句,英文例句-词都网

Experimentl Study on Microwave Pretreatment with Cyanide Leaching of Gold Flotation Concentrate Containing High Arsenic from Guigang, Guangxi; ... Research on Pretreatment and Oxidation Kinetics of High-sulfur and High-Arsenic Refractory Gold Concentrate by Fenton Agent in Acid Medium Fenton试剂深度预处理高硫高砷难选金精矿及其 ...

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(PDF) Bacterial Leaching as a Pre-treatment Step for Gold ...

In this article, pre-treatment such as bio-leaching before cyanidation is discussed as an alternative technique to treat refractory gold ores containing pyrite and arsenopyrite.

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Pretreatment Process on Refractory Gold Ores with As

1. Introduction. Gold ores are considered refractory if gold extractions from a conventional cyanidation process are less than 80% even after fine grinding. 1) Arsenic-bearing refractory gold ore has stones extremely difficult to deal with. In the stones, gold is locked up in arsenic mineral matrix as the form of microscopic or submicroscopic lattice.

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Mineralogy and Pretreatment of a Refractory Gold Deposit ...

The technological mineralogy of a gold deposit located in North-Western province of Zambia was carried out by using X-ray fluorescence spectroscopy (XRF), X-ray diffraction spectroscopy (XRD), and scanning electron microscope (SEM). The results showed that gold was highly dispersed in gold-bearing minerals such as pyrite, arsenopyrite, and some gangues in the form of natural gold and electrum.

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Arsenic Precipitation from Solutions in Autoclave ...

Currently, the share of gold extracted from technologically simple gold ores is steadily decreasing, which determines the involvement in the processing of refractory gold ores containing finely disseminated gold and silver in sulfides, mainly in pyrites and arsenopyrites. Autoclave oxidation is a promising method of pretreatment of the refractory sulfide-arsenic gold-bearing raw materials ...

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ALTA Gold 2012 E-Doc - Home 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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Catalytic Oxidation Pretreatment of Sulfide-Rich Arsenic ...

This paper summarizes the result of experiment that was fourced on investigation of oxidation pretreatment on sulfide mineral for leaching of refractory gold concentrate by hydrogen peroxide in sulfuric acid. For a viable option, extraction rate of Fe, Cu was low, but extraction rate of arsenic reached nearly 100%. As the result of oxidation, elemental sulfur was not produced.

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Recovery of gold from sulfide refractory gold ore ...

Pretreatment of sulfide refractory gold ore by biooxidation in coarse-crushed ore heaps, prior to leaching the gold in a separate heap, is a promising new technology that is about to be ...

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Pressure Oxidation Pretreatment of Refractory Gold ...

Pressure oxidation of gold containing concentrates and ores is an effective pretreatment for liberating refractory gold. This is particularly true when an appreciable portion of the gold is associated with sulfides and is not amenable to conventional cyanidation. A brief review of the literature on pressure oxidation of refractory gold materials is presented. The chemistry of the aqueous ...

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Increasing leaching rate of gold cyanide of two-stage ...

Apr 03, 2015  Chapman JT, Marchant PB, Lawrence RW, Knopp R. Bio-oxidation of a refractory gold bearing high arsenic sulphide concentrate: a pilot study. FEMS Microbiol Rev. 1993;11(1–3):243. Article Google Scholar [3] Amankwah RK, Yen WT, Ramsay JA. A two-stage bacterial pretreatment process for double refractory gold ores.

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Effect of Oxidative Pretreatment and Lead Nitrate Addition ...

In this paper, the effect of the oxidative pretreatment and lead nitrate addition on the cyanidation of Zarshuran refractory gold ore containing 3.32 ppm Au, 1.09% As, and 0.5% sulfur were ...

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提高含砷碳难处理氧化金矿石选冶回收率的试验研究

ZHANG Zhilei,LI Yong,LIU Zhixin. Test Study on Cyanide Recovery Rate Improving on the Arsenic Containing Carbon Refractory Oxidized Gold Ore Separation[J]. Gold

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Characterization of ferric arsenate-sulfate compounds ...

1 1 Revision 1 2 3 Characterization of ferric arsenate-sulfate compounds: Implications for 4 arsenic control in refractory gold processing residues 5 6 7 DOGAN PAKTUNC1*, JURAJ MAJZLAN2, LUKÁŠ PALATINUS3, JOHN 8 DUTRIZAC1, MARIANA KLEMENTOVÁ3, and GLENN POIRIER1,4 9 10 1CanmetMINING, 555 Booth St., Ottawa, ON, K1A 0G1, Canada 11 2Institute of Geosciences,

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Effect of Oxidative Pretreatment and Lead Nitrate Addition ...

Cyanidation is the main process in gold leaching. There are several parameters that affect gold recovery and cyanide consumption. In this paper, the effect of the oxidative pretreatment and lead nitrate addition on the cyanidation of Zarshuran refractory gold ore containing 3.32 ppm Au, 1.09% As, and 0.5% sulfur were investigated. Au recovery was increased from 79.4% to 89.4% in the presence ...

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Well-controlled stirring tank leaching to improve bio ...

Jun 10, 2020  For the high sulfur refractory gold concentrate with 41.82% sulfur and 15.12 g/t gold, of which 82.11% was wrapped in sulfide, a well-controlled stirring tank leaching was carried out to improve the bio-oxidation efficiency. Results show that bio-oxidation pretreatment can greatly improve the gold recovery rate of high-sulfur refractory gold concentrate, and at the optimum pH 1.3 in this study ...

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