pyrite flotation arsenopyrite

pyrite flotation arsenopyrite

Differential flotation of pyrite and arsenopyrite: Effect ...

2021-3-15  Flotation of pyrite and arsenopyrite decreased with increase in pulp pH irrespective of the collector type used, owing to an increase in surface oxidation species. Upon increasing collector concentration, flotation of arsenopyrite was restored ascribed to the co-adsorption of xanthate ions and dixanthogen.

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The flotation separation of pyrite from arsenopyrite using ...

2000-12-1  The flotation response of pyrite and arsenopyrite to increasing HTA concentration at pH 11. Since Ca(OH) 2 is commonly used in industrial flotation applications as a pH regulator, some tests were carried out to investigate its influence on floatability.

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Decoupling pyrite and arsenopyrite in flotation using ...

2021-6-1  1. Introduction. Flotation is often used as a preconcentration step in processing of auriferous refractory ores [11,19] .The process separates valued mineral sulphides into a froth concentrate, mostly predominated by pyrite and arsenopyrite [].These minerals hosts fine-grained gold particles encapsulated in their matrix [] often requiring further pretreatment prior to gold

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Flotation separation of pyrite from arsenopyrite using ...

2020-6-20  Fig. 2 shows the effect of pH on the flotation recovery of minerals in the presence and absence of copper ions In the absence of the copper ions, the recovery values of both pyrite and arsenopyrite fluctuated between 55 % and 65 % at pH 2.5–6.5. Furthermore, their floatability rapidly decreased when the pH value was above 6.5. Two samples with similar flotation

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THE SEPARATION OF PYRITE AND ARSENOPYRITE BY

1991-1-1  The aim of the research programme is to investigate the potential of flotation for the separation of arsenopyrite and pyrite minerals. The efficient separation of pyrite and arsenopyrite by a cheap process such as flotation has long been recognized as a desirable technological goal for ores containing both minerals.

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Selective Flotation of Pyrite from Arsenopyrite by Low ...

In this study, the surface modification of arsenopyrite and pyrite with low temperature oxygen plasma was developed as an effective approach to improve the flotation separation efficiency of minerals. The micro-flotation experiments results indicated that plasma pre-treatment can achieve selective flotation of arsenopyrite from pyrite. The XPS analysis results indicated that the

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Flotation Behavior of Arsenopyrite and Pyrite, and Their ...

Such a different trend in flotation behavior of the mixed sample from the flotation behavior of the single minerals was because the surface oxidation reaction of arsenopyrite, which was more affected by E H among the mixed arsenopyrite and pyrite, generated ferric arsenate, a hydrophilic compound, on the surface of arsenopyrite, resulting in ...

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Selective separation of arsenopyrite from pyrite by ...

Effective methods for selective separation using flotation or flocculation of arsenopyrite from pyrite by biomodulation using Acidithiobacillus ferrooxidans are presented here. Adhesion of the bacterium to the surface of arsenopyrite was very slow

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Arsenopyrite and pyrite bioleaching: evidence from XPS ...

2011-8-17  The flotation concentrate was a mixture of pyrite (FeS 2) and arsenopyrite (FeAsS); after bioleaching, 95% of the initial content of pyrite and 85% of arsenopyrite were dissolved. The chemical state of the main elements (Fe, As and S) at the surface of the bioreactor feed particles and of the residue after bioleaching was investigated by X-ray ...

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FLOTATION CHARACTERISTICS OF ARSENOPYRITE by

2017-1-13  Flotation studie demonstrates thde use o oxidatiof for n arsenopyrite depression In th presence o. oxidationf e , increasing pH above pH = 7 resulted in increase d arsenopyrite depression while increasin temperatur haegd little effec untit l a temperatur of 40°eC exceeded was Previousl. y activated

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Flotation Behavior of Arsenopyrite and Pyrite, and Their ...

Such a different trend in flotation behavior of the mixed sample from the flotation behavior of the single minerals was because the surface oxidation reaction of arsenopyrite, which was more affected by E H among the mixed arsenopyrite and pyrite, generated ferric arsenate, a hydrophilic compound, on the surface of arsenopyrite, resulting in ...

More

THE SEPARATION OF PYRITE AND ARSENOPYRITE BY

1991-1-1  The aim of the research programme is to investigate the potential of flotation for the separation of arsenopyrite and pyrite minerals. The efficient separation of pyrite and arsenopyrite by a cheap process such as flotation has long been recognized as a desirable technological goal for ores containing both minerals.

More

SEPARATION OF PYRITE FROM ARSENOPYRITE BY

2016-7-22  of pyrite at pH 10 96 Figure 5.1. The flotation of arsenopyrite with 6.94*10"^ mol/1 NaEX and 4.95*10-5 mol/1 KAX 99 Figure 5.2. The effect of increasing NaEX and KAX concentration on the flotation recovery of arsenopyrite at pH 3.2 and 3.5 respectively 99 Figure 5.3. Flotation recovery of arsenopyrite with 8.4*10"'^ mol/1 S7 and 2 mg/1 F2B 100

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The Selective Flotation of Arsenopyrite from Pyrite

2016-11-28  The selective flotation of arsenopyrite from pyrite B. Tapley, D. Yan * WA School of Mines, Curtin University, LB 22 Kalgoorlie, WA 6433, Australia Received 8 May 2003; accepted 7 July 2003 Abstract Flotation tests were conducted to compare the arsenopyrite depressing effect of MAA with pH control, potassium permanganate and pre-aeration.

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Leaching of the arsenopyrite/pyrite flotation

2009-10-15  The arsenopyrite/pyrite flotation concentrate, mainly studied in the hydrochloric acid medium, decomposed through the non–oxidative chemical dissolution reaction and the reductive decomposition reaction for the arsenopyrite and pyrite components, respectively. Desulphurization levels below 65% were achieved at pH

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Selective separation of arsenopyrite from pyrite by ...

Effective methods for selective separation using flotation or flocculation of arsenopyrite from pyrite by biomodulation using Acidithiobacillus ferrooxidans are presented here. Adhesion of the bacterium to the surface of arsenopyrite was very slow compared to that to pyrite, resulting in a differenc

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Flotation separation of arsenopyrite from pyrite - BEATTIE ...

1991-11-27  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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Effect of Collector Type and Blends on Mixed Pyrite and ...

2020-8-21  Pyrite and Arsenopyrite Flotation”, Proceedings of 6th UMaT Biennial International Mining and Mineral Conference, Tarkwa, Ghana, pp. 372-377. Abstract Sulfhydryl collectors have received wide applications in sulphide value mineral flotation. Blends of this group of collectors have shown the existence of synergism in collecting action when ...

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FUNDAMENTAL STUDIES ON PYRITE, PYRRHOTITE AND

2009-9-17  Pyrite,pyrrhotite and arsenopyrite are sulphide minerals which bear iron in their structures and are collected in flotation plants by thio-compounds, for example: xanthates, dithiophosphates, mercaptans, mercaptobenzothiazolea Selective flotation among iron bearing minerals is always difficult to be achieved.The present flotation state-of-art

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Pyrite Flotation - Froth Flotation (Sulphide Oxide ...

2021-9-25  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 how these factors affect the floatability of the pyrites from low grade refractory ore.

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THE SEPARATION OF PYRITE AND ARSENOPYRITE BY

1991-1-1  The aim of the research programme is to investigate the potential of flotation for the separation of arsenopyrite and pyrite minerals. The efficient separation of pyrite and arsenopyrite by a cheap process such as flotation has long been recognized as a desirable technological goal for ores containing both minerals.

More

SEPARATION OF PYRITE FROM ARSENOPYRITE BY

2016-7-22  of pyrite at pH 10 96 Figure 5.1. The flotation of arsenopyrite with 6.94*10"^ mol/1 NaEX and 4.95*10-5 mol/1 KAX 99 Figure 5.2. The effect of increasing NaEX and KAX concentration on the flotation recovery of arsenopyrite at pH 3.2 and 3.5 respectively 99 Figure 5.3. Flotation recovery of arsenopyrite with 8.4*10"'^ mol/1 S7 and 2 mg/1 F2B 100

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The Selective Flotation of Arsenopyrite from Pyrite

2016-11-28  The selective flotation of arsenopyrite from pyrite B. Tapley, D. Yan * WA School of Mines, Curtin University, LB 22 Kalgoorlie, WA 6433, Australia Received 8 May 2003; accepted 7 July 2003 Abstract Flotation tests were conducted to compare the arsenopyrite depressing effect of MAA with pH control, potassium permanganate and pre-aeration.

More

Flotation separation of arsenopyrite from pyrite - BEATTIE ...

1991-11-27  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 ...

More

Leaching of the arsenopyrite/pyrite flotation

2009-10-15  The arsenopyrite/pyrite flotation concentrate, mainly studied in the hydrochloric acid medium, decomposed through the non–oxidative chemical dissolution reaction and the reductive decomposition reaction for the arsenopyrite and pyrite components, respectively. Desulphurization levels below 65% were achieved at pH

More

(PDF) A Brief Review of Auriferous Sulphide Flotation ...

flotation of auriferous pyrite and arsenopyrite by using tertiar y dodecyl mercaptan as collector in weak alkaline pulp ” , Minerals Engineering , Vol.

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Arsenopyrite and pyrite bioleaching: evidence from XPS ...

2011-8-17  The flotation concentrate was a mixture of pyrite (FeS 2) and arsenopyrite (FeAsS); after bioleaching, 95% of the initial content of pyrite and 85% of arsenopyrite were dissolved. The chemical state of the main elements (Fe, As and S) at the surface of the bioreactor feed particles and of the residue after bioleaching was investigated by X-ray ...

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Arsenopyrite Flotation Depression - Arsenopyrite

2017-1-13  Arsenopyrite Flotation Depression – Arsenopyrite Rejection. Floatability of arsenopyrite as a function of initial concentration of sodium isopropyl xanthate at various pH values. Recovery of arsenic as a function of pH in flotation of an arsenopyrite ore

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A Brief Review of Auriferous Sulphide Flotation ...

2020-8-21  2.1 Oxidation of pyrite and Arsenopyrite Froth flotation is a physicochemical process and warrants an in depth understanding of mineral surface alteration typically in aqueous solution for flotation (Dong et al., 2019, Wills and Finch 2016). The mineral oxidation dictates the surface species

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Pyrite Flotation - Froth Flotation (Sulphide Oxide ...

2021-9-25  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 how these factors affect the floatability of the pyrites from low grade refractory ore.

More