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(PDF) Selective flotation of chalcopyrite from pyrite

The presence of chalcopyrite increased the depression effect of biopolymers on the flotation of copper-activated pyrite due to enhanced oxidation of the copper activation product, Cu(I)S, on

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The separation of chalcopyrite and chalcocite from pyrite

Apr 01, 2014· Low pyrite flotation is achieved after regrinding in the presence of chalcopyrite. • High pyrite flotation is achieved after regrinding in the presence of chalcocite. • These phenomena are governed by the electrochemical activity of chalcopyrite and chalcocite. • Flotation and separation are less affected by primary grinding at coarser sizes.

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Effect of regrinding and pulp aeration on the flotation of

Nov 01, 2014· These chalcopyrite–pyrite mineral flotation studies show that the decrease in particle size upon regrinding leads to a marked decrease in chalcopyrite flotation recovery and rate, notwithstanding the fact that the concentration of xanthate collector was scaled to the mineral surface area. Chalcopyrite recovery could be partially restored to a

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The effect of saline water on copper activation of pyrite

Jan 15, 2019· 1. Introduction. Chalcopyrite, the major mineral for copper production, is often found finely interlocked with iron sulfide minerals, particularly pyrite (Owusu et al., 2014).Pyrite is usually perceived as a gangue mineral and removed by flotation to minimize its contamination in copper concentrates (Wang and Forssberg, 1991).In froth flotation, hydrophobic particles are supposed to

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CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

Chemisorption of sulphide ions on pyrite probably occurs similarly to sulphite4 ion on pyrite. Flotation of Chalcopyrite (CuFeS 2) Complete flotation of chalcopyrite is possible from pH 3 to pH 12 with ethyl xanthate. Both electrochemical oxidation of xanthate to dixanthogen as well as chemisorption of

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Effect of starch on surface properties of pyrite and

Nov 01, 2019· 1. Introduction. Pyrite (FeS 2) usually occurs as a gangue mineral and is widely associated with valuable minerals such as chalcopyrite, sphalerite, and galena (Mu et al., 2018).The economic extraction of valuable metals requires the selective removal of these minerals from pyrite by flotation (Chandraprabha and Natarajan, 2006, Chandra and Gerson, 2009).

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An Electrochemical Study of Surface Oxidation and

The influence of pyrite oxidation on flotation of other valuable sulfide minerals is an important topic for the mineral industry and has attracted many studies [34-37]. Owusu et al. [4] recently investigated the effect of pyrite on flotation of chalcopyrite and reported pyrite can be activated by

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FTIR studies of xanthate adsorption on chalcopyrite

Sep 24, 2013· Compared to chalcopyrite and pentlandite, the formation of dixanthogen is more essential for the flotation of pyrite. Therefore, the pulp redox potential for controlling the oxidation of xanthate into dixanthogen is an important factor for the depression of pyrite in copper–nickle sulfide ore flotation.

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Pyrite Depression in Copper Flotation

The Pyrite Depression in a Copper Only Flotation circuit is simple enough. If your froth flotation system only tries to recover chalcopyrite-copper, you need to bring the plant’s pH up to the other side (right side) of the PYRITE curve. The more flotation collector you have on, the higher you will need to increase that pH for effective pyrite depression. You also need to insure your pyrite

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Chalcopyrite and pyrite floatabilities in the presence of

Pyrite recovery was sharply increased by the addition of sodium sulfide in light of sodium sulfide-induced collectorless flotation; however, it showed a very weak effect on chalcopyrite floatability. In addition, the highest and lowest chalcopyrite and pyrite

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Pyrite Oxidation Mechanism by Oxygen in Aqueous Medium

Nov 08, 2015· sphalerite (ZnS), chalcopyrite (CuFeS 2), and galena (PbS). 1,2 Pyrite is also an undesired inorganic constituent present in coal. Flotation techniques have been developed to separate pyrite from the other valuable minerals.3 The pyrite surface has also been suggested to play a central hole in the origin of life, acting

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Wetting of Sphalerite, Chalcopyrite and Pyrite in

The article reports the studies into surface wetting of sphalerite, chalcopyrite and pyrite after treatment in saltish solution and in artificial sea water with concentration of 2, 8 and 16‰. The collecting agents were potassium isopropyl xanthate and sodium isopropyl dithiophosphate (Aeroflot). The results show that depending on concentration of sea salt and collector as well as on

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Flotation kinetics and thermodynamic behavior of

Keywords: Chalcopyrite, pyrite, high alkaline, flotation kinetics, microcalorimetry, flotation separation 1. Introduction In China, copper is mainly produced from chalcopyrite. Since it is generally in a symbiotic combination with pyrite, chalcopyrite needs to be separated from pyrite by flotation, which is

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An Electrochemical Study of Surface Oxidation and

The influence of pyrite oxidation on flotation of other valuable sulfide minerals is an important topic for the mineral industry and has attracted many studies [34-37]. Owusu et al. [4] recently investigated the effect of pyrite on flotation of chalcopyrite and reported pyrite can be activated by

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Selective flotation of enargite and chalcopyrite Request PDF

Selective flotation of enargite from chalcopyrite under varied pulp potentials was conducted to investigate the feasibility of enargite removal from a chalcopyrite concentrate.The test results

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CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

Chemisorption of sulphide ions on pyrite probably occurs similarly to sulphite4 ion on pyrite. Flotation of Chalcopyrite (CuFeS 2) Complete flotation of chalcopyrite is possible from pH 3 to pH 12 with ethyl xanthate. Both electrochemical oxidation of xanthate to dixanthogen as well as chemisorption of

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A STUDY OF FLOTATION AND LEACHING BEHAVIOUR OF

Collectorless flotation of chalcopyrite observed under oxidizing conditions using air is thought to be prevalent even in the presence of a collector obscuring the selectivity of the process. Leaching of the mixtures of bornite and chalcopyrite at mass ratios of 1:1, 1:3 and 3:1 are

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Effect of pyrite type on the electrochemistry of

Pyrite is highly floatable and readily enters the flotation concentrates, diluting the grade of valuable products. In addition, it is well known pyrite interacts with other base metal sulphide minerals, such as chalcopyrite. Such interactions are thought to boost pyrite floatability due to copper activation, while

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Agglomeration–Flotation of Finely Ground Chalcopyrite

Agglomeration-flotation of a mixture containing chalcopyrite and quartz with 1:1 ratio (w/w, weight by weight) showed that Si recovery in froth was low and did not change with varying conditions

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Structural Modification of Xanthate Collectors To Enhance

2.2.2. Flotation Tests. Pure mineral flotation was performed on an XFG5-35 flotation machine (Jilin Prospecting Machinery Factory, China). It was operated at 1650 rpm with a 35 mL Plexiglas cell. Chalcopyrite or pyrite (2 g) was placed into the flotation cell before the cell was filled with 30 mL of

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Rcovery of gold in pyritic ores Mine Engineer.Com

That appears to leave froth flotation as still the best method of recovering the gold from pyritic ores. Sulfide ores, such as chalcopyrite, sphaelerite, galena, and pyrrhotite, and mixtures of these ores have historically been found with micron size gold particles included in them.

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Separation Process of Chalcopyrite, Galenite, Sphalerite

Separation Turn: chalcopyrite first, pyrite second. 1.2 Bulk Flotation: This method is suitable for the combination of chalcopyrite and pyrite in the ore. The size of the coalition of chalcopyrite and pyrite is some coarse. While the particle size of the monomer is fine, the qualified tailing is separated by bulk flotation, then the mixed

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Heterocoagulation of chalcopyrite and pyrite minerals in

This paper examines the interactions between chalcopyrite (a copper mineral) and pyrite (an iron mineral often bearing gold) as they approach each other in suspensions with added chemicals, and relates the results to the experimental data for the flotation recovery and selectivity.

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