pyrite flotation arsenopyrite

Flotation separation of pyrite from arsenopyrite using ...

2020-6-20  Fig. 3plots the depression effects of HA on both pyrite and arsenopyrite flotation. Although both their recoveries decreased with the increasing HA dose, the pyrite recovery decreased less than compared to arsenopyrite, suggesting the generation of their floatability differences.

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Decoupling pyrite and arsenopyrite in flotation using ...

Thionocarbamate collectors are noted for their high flotation selectivity against pyrite under alkaline condition. In this study, selectivity of O-iso

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Flotation Behavior of Arsenopyrite and Pyrite, and

This study investigated the effect of pH and pulp potential (EH) on the floatability of arsenopyrite and pyrite, which are single minerals, in Hallimond tube, by using xanthate as a collector. On...

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The selective flotation of arsenopyrite from pyrite ...

Gold can be recovered through bulk flotation or selective flotation processes according to the distribution of gold in pyrite and arsenopyrite [24,25]. The selective flotation of arsenopyrite from...

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Flotation Behavior of Arsenopyrite and Pyrite, and

This study investigated the effect of pH and pulp potential (EH) on the floatability of arsenopyrite and pyrite, which are single minerals, in Hallimond tube, by using xanthate as a collector. On this basis, the study further investigated the selectivity index of arsenopyrite and pyrite, using a mixed sample of arsenopyrite and pyrite.

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Selective separation of arsenopyrite from pyrite by ...

The cells were able to effectively depress pyrite flotation in presence of collectors like potassium isopropyl xanthate and potassium amyl xanthate. On the other hand the flotability of arsenopyrite after conditioning with the cells was not significantly affected.

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Leaching of the arsenopyrite/pyrite flotation concentrates ...

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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FLOTATION CHARACTERISTICS OF ARSENOPYRITE by

2017-1-13  17 Voltammograms for pyrite and arsenopyrite a t pH = 11 52 18 Eh - pH diagra fom r arsenopyrite. Activit foy r eac h species taken to be 1 0" 3 M 54 19 Current - decay curv foe r Arsenopyrite at +0.0343 V 58 20 Multiple Sweep Voltammograms for

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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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ARSENOPYRITE ENRICHMENT BY COLUMN FLOTATION

2006-1-30  Column flotation; arsenopyrite; amines INTRODUCTION Pyrite concentrates sometimes contain considerable amounts of arsenic. Since they are usually used for the production of sulphuric acid, this is undesirable. However, gold is often associated with arsenopyrite,

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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 oxidation ...

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THE SEPARATION OF PYRITE AND ARSENOPYRITE BY

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

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Flotation of pyrite and arsenopyrite at alkaline pH -

Flotation of pyrite and arsenopyrite at alkaline pH Hydrocyclone investigation and modelling at medium feed soli Prediction of performance of 76-mm compound autogenous cyclo Liberation of accessory minerals from various rock types by Electrochemical removal of lead from aluminium using fused s

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FLOTATION SEPARATION OF ARSENOPYRITE FROM

The pyrite rougher flotation tailings in this example were treated differently than as shown in Fig. 1. Instead of floating a bulk sphalerite-arsenopyrite concentrate, the arsenopyrite was depressed during sphalerite flotation using additions of base, cyanide, and xanthate collector and then subsequently activated with copper sulfate and collector and floated.

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Flotation separation of arsenopyrite from pyrite -

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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Leaching of the arsenopyrite/pyrite flotation concentrates ...

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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(PDF) Selective separation of arsenopyrite from an ...

The elec- trokinetic measurements of the pyrite and arsenopyrite/ permanganate systems was used for interpretation of the floatability experiments. ARSENOPYRITE SEPARATION FROM AURIFEROUS PYRITE BY SULPHONATE FLOTATION 151 Methyl isobutyl ketone, a frother, when added in the pulp, improved the flotation results.

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ARSENOPYRITE ENRICHMENT BY COLUMN FLOTATION

2006-1-30  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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Pyrite−Arsenopyrite Galvanic Interaction and ...

2019-5-25  Comparative voltammetric studies were performed between high purity pyrite mineral (98.86%) and arsenopyrite mineral (content of 85.96% arsenopyrite, FeAsS; 11.84% pyrite, FeS2; 0.98% galena, PbS; 0.06% chalcopyrite, CuFeS2) in order to analyze the galvanic effect on the electrochemical reactivity of two different mineralogical phases when these are associated in the same mineral, using

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Gold Pyrite, Pyrrhotite and Arsenopyrite Recovery

2021-3-18  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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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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Flotation of pyrite and arsenopyrite at alkaline pH -

Flotation of pyrite and arsenopyrite at alkaline pH Hydrocyclone investigation and modelling at medium feed soli Prediction of performance of 76-mm compound autogenous cyclo Liberation of accessory minerals from various rock types by Electrochemical removal of lead from aluminium using fused s

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Leaching of the arsenopyrite/pyrite flotation concentrates ...

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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Technical Note The selective flotation of arsenopyrite

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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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 difference in surface modification of the minerals subsequent to interaction with cells.

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(PDF) Selective separation of arsenopyrite from an ...

The elec- trokinetic measurements of the pyrite and arsenopyrite/ permanganate systems was used for interpretation of the floatability experiments. ARSENOPYRITE SEPARATION FROM AURIFEROUS PYRITE BY SULPHONATE FLOTATION 151 Methyl isobutyl ketone, a frother, when added in the pulp, improved the flotation results.

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flotation separation arsenopyrite - Hitlers Hollywood

2021-1-5  MORE DETAILS: EP0568672B1 Flotation separation of arsenopyrite from. On addition of a collector the pyrite is rendered floatable enabling froth flotation to achieve a concentrate rich in pyrite and tailings rich in arsenopyrite 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 ...

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Selective separation of arsenopyrite from pyrite by ...

2004-8-1  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 difference in surface modification of the minerals ...

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arsenopyrite pyrite said - Agri Alliance

2020-12-24  Through selection of the effective inorganic depressants for arsenopyrites in flotation system, the main As-containing mineral (arsenopyrite) can be effectively depressed and separated from the said pyrite concentrate, containing 33.1% S, and only 0.48 % As by one-stage roughing and two-stage cleaning flotation operations

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Gold Pyrite, Pyrrhotite and Arsenopyrite Recovery

2021-3-18  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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