separation of arsenopyrite and pyrite

Enhance flotation separation of arsenopyrite and pyrite by …

2019-6-30 · The flotation separation efficiency of pyrite and arsenopyrite can be enhanced by low-temperature oxygen plasma pretreatment. In this study, the plasma modification mechanism on arsenopyrite and pyrite and the effect on the flotation performance of …

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Spiral: Separation of pyrite from arsenopyrite by flotation

2016-7-22 · This thesis reports investigations into the flotation separation of pyrite from arsenopyrite using xanthates and the new collectors Fl, S7 and F2B developed by Dow Chemical Company. The Dow surfactants were classified as chelating collectors by the manufacturer. For this purpose Hallimond tube, bench and column flotation tests were run in order ...

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Electronic and chemical structures of pyrite and arsenopyrite

2018-1-2 · Flotation separation of pyrite from arsenopyrite in the presence of oxidants. Separation Science and Technology, Vol. 54, Issue. 17, p. 2933. CrossRef; Google Scholar; Hong, Jun Liu, Lihu Tan, Wenfeng and Qiu, Guohong 2020. Arsenic release from arsenopyrite oxidative dissolution in the presence of citrate under UV irradiation. Science of The ...

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Enhance flotation separation of arsenopyrite and pyrite by …

2019-6-30 · The three-dimensional AFM images of arsenopyrite and pyrite with and without plasma modification are shown in Fig. 5. As shown in Figs. 5a and c, the relative smoothness of untreated arsenopyrite and pyrite surfaces are reflected in the low roughness values of 0.815 and 0.385 nm, respectively. After pretreatment with oxygen plasma for 1 min ...

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THE SEPARATION OF PYRITE AND ARSENOPYRITE BY …

1991-11-15 · 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. A series of novel collectors, based on a different chemistry from conventional xanthates and similar surfactants, has been developed, which might lead to the ...

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THE SEPARATION OF PYRITE AND ARSENOPYRITE BY …

FP2,,,Aegean Metallurgical Industries SA(EL),Cheni SA(FR),Institute of Geology and Mineral Exploration(EL),Imperial College of Science, Technology and Medicine(UK)

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Arsenopyrite removal from pyrite concentrate using …

PHGMS process, a pyrite concentrate assaying 27.14% S with. 83.47% recovery was produced, with its arsenic content reduced to. 0.43% from the unquali fi ed pyrite concentrate of …

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Selective separation of pyrite from chalcopyrite and …

2005-1-6 · The adhesion of A. ferrooxidans onto pyrite, chalcopyrite and arsenopyrite as a function of time is depicted in Fig. 2.Attachment kinetics with respect to pyrite and chalcopyrite was similar and was very fast with the equilibrium attained within 15 min. Presence of copper ions in the chalcopyrite lattice does not seem to affect the kinetics of adhesion of cells on its surface.

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Separation of pyrite, arsenopyrite, and pyrrhotite by flotation

This invention relates to a process of separating pyrite from arsenopyrite and/or from pyrrhotite by froth flotation. Many sulfide ores contain mixtures of pyrite and arsenopyrite and in some cases mixtures of pyrite, arsenopyrite and pyrrhotite. It is desirable to obtain concentrates of the...

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Microbially induced separation of arsenopyrite and …

2009-11-1 · This paper discusses the role of the mineral-adapted acidiphilic microorganism Acidithiobacillus ferrooxidans in the beneficiation of arsenopyrite-containing multisulfides (pyrite and chalcopyrite) and the bioremediation of the resulting arsenical waste water. It was found that adaptation to minerals alters the surface properties of the microorganism. Bacterial adaptation …

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Selective separation of arsenopyrite from an auriferous …

1993-5-1 · Arsenopyrite has been selectively floated from pyrite by an unconventional amonic collector (so- dram dodecylsulphonate), at the pH range of about 4.

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SEPARATION OF PYRITE FROM ARSENOPYRITE BY …

2016-7-22 · Figure 4.4. Flotation of pyrite recovery against S7 concentration at pH 3 79 Figure 4.5. Recovery of pyrite with 2 mg/1 F2B concentration 80 Figure 4.6. Recovery of pyrite and quartz using Fl at different pH 82 Figure 4.7. The effect of increasing Fl concentration on the recovery 82 Figure 4.8. The effect of conditioning on the flotation of ...

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Selective separation of arsenopyrite from pyrite by …

2004-8-15 · 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. The cells were able to effectively depress pyrite flotation in presence of collectors like potassium isopropyl xanthate and potassium amyl ...

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Separation of pyrite, arsenopyrite, and pyrrhotite by …

A method of separating pyrite from arsenopyrite which comprises subjecting a mixture containing both to conditioning with a sufficient alkali metal permanganate to depress the arsenopyrite and subjecting the conditioned material to 55 froth flotation in the presence of a promoter for Conditions and reagents Conditions Reagents, pounds per ton ...

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The flotation separation of pyrite from arsenopyrite using …

2000-12-1 · The tests carried out with the Hallimond tube indicated the possibility of pyrite–arsenopyrite separation using HTA. Therefore, bench flotation tests were designed as a further step to verify the Hallimond tube test results. Because the flotation products contain three components, the concept of "the ratio of pyrite/arsenopyrite recovery ...

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Flotation Behavior of Arsenopyrite and Pyrite, and Their …

This study investigated the effect of pH and pulp potential (E-H) 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. To examine the flotation behavior of each mineral by pH ...

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Electronic and chemical structures of pyrite and arsenopyrite

2015-12-1 · Abstract The first-principles plane-wave pseudopotential method is used to study the electronic and chemical structures of pyrite (FeS2) and arsenopyrite (FeAsS). The results indicate that an antibonding interaction occurs between Fe and As atoms in arsenopyrite. This interaction results in the Fe atom being repelled towards the S atom to stabilize antibonding orbitals, …

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Selective separation of arsenopyrite from pyrite by …

2004-8-15 · 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 pyrite from arsenopyrite using …

2020-3-1 · A satisfactory separation of chalcopyrite and pyrite was achieved at weakly alkaline condition (pH 8), at which the flotation recovery of chalcopyrite was …

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Flotation Behavior of Arsenopyrite and Pyrite, and Their …

arsenopyrite and pyrite (FeS 2) are very similar, it is difficult to simply separate them using flotation. Only a few studies, to the best of our knowledge, focused on the separation of arsenopyrite and pyrite in an arsenopyrite-pyrite or an arsenopyrite-pyrite-quartz system.18,19) For example, Sirkeci

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Enhance flotation separation of arsenopyrite and pyrite by …

Abstract The flotation separation efficiency of pyrite and arsenopyrite can be enhanced by low-temperature oxygen plasma pretreatment. In this study, the plasma modification mechanism on arsenopyrite and pyrite and the effect on the flotation performance of pyrite and arsenopyrite were investigated. The results showed that plasma modification preferentially starts at the edges …

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US5171428A

Selective separation of arsenopyrite from pyrite by biomodulatio…

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Flotation Behavior of Arsenopyrite and Pyrite, and Their …

Pyrite had low floatability at both pH 4 and pH 10. Just as for arsenopyrite, the result for pH 10 was caused by the low E H of pulp. Yet, interestingly enough, different from the case of arsenopyrite, pyrite at pH 4 had low floatability, despite its high E H. FTIR analysis was performed, to examine the reason for such contradictory behavior.

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Flotation separation of pyrite from arsenopyrite in the ...

When H2O2 is used, the As content in pyrite concentrate decreases from 2.27% without addition of H2O2 to 1.11% with H2O2 dosage of 900 g/t, and the pyrite recovery is still high (86.58%). NaClO, KMnO4, and K2Cr2O7 have poor selectivity for the As-S separation.

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Flotation separation of arsenopyrite from pyrite

1991-11-27 · 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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Enhance flotation separation of arsenopyrite and pyrite by …

The flotation separation efficiency of pyrite and arsenopyrite (cas 1303-18-0) can be enhanced by low-temperature oxygen plasma pretreatment. In this study, the plasma modification mechanism on arsenopyrite and pyrite and the effect on the flotation performance of pyrite and arsenopyrite were investigated.

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Separation of pyrite and arsenopyrite in a gold sulfide …

Download Citation | Separation of pyrite and arsenopyrite in a gold sulfide concentrate | Gold at the Harbour Lights Mine (HLM), WA occurs principally in pyrite (Py) and arsenopyrite (AsPy ...

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A novel method to improve the flotation separation of …

1 troduction. Arsenic pollution has long been a concern because of its serious harm to the environment (Han et al., 2013), and arsenic removal is becoming more and more significant (Forson et al., 2022a, Han et al., 2013, Wang et al., 2021b).Arsenopyrite is an As-bearing mineral (Liu et al., 2022), which is often recovered by flotation.The flotation separation of arsenopyrite …

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Separation of pyrite-arsenopyrite products by flotation …

M. I. Khersonskii, "Development and commercialization of ecologically safe and resource- and energy-conserving technology for the separation of collective copper-molybdenum concentrates with the use of low-molecular-weight organic depressors of the class of substituted O-alkyl-N-enylthiocarbamates" Author''s Abstract of Candidate''s ...

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Flotation separation of pyrite from arsenopyrite using …

2020-6-20 · The flotation separation test of the pyrite-arsenopyrite artificial mixed minerals was conducted using the combined depressants. Fig. 5 depicts that a pyrite concentrate, with a grade of 49.85 wt.% S and 3.84 wt.% As and a recovery of 50.73 % S and12.11 % As was obtained. In contrast, the obtained arsenopyrite contained 41.19 wt.% S and 23.72 wt.%

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