Effect of sulfur dioxide on flotation of chalcopyrite

Chander, Subhash; Khan, Ashikur R.

doi:10.1016/s0301-7516(99)00038-1

Cited by 9 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because the Cu/Fe has open unsaturated bonding ability, the water molecules are completely likely to be attached to these active sites, which was supported by the adsorption energy of water molecule on CuFeS 2 -001 (−15.7 kcal/mol), as listed in Table . Besides, Chandler and Walker had reported that the surface hydrophobicity of chalcopyrite should be ascribed to the exposed copper–sulfur (Cu–S)-rich and S-rich layer resulted from the oxidation of chalcopyrite surface. , This issue has not been included in this work and would be further considered in the future.…”

Section: Resultsmentioning

confidence: 98%

See 1 more Smart Citation

Adsorption Mechanism of 4-Amino-5-mercapto-1,2,4-triazole as Flotation Reagent on Chalcopyrite

Yin

Sun

et al. 2018

Langmuir

View full text Add to dashboard Cite

A novel compound 4-amino-5-mercapto-1,2,4-triazole was first synthesized, and its selective adsorption mechanism on the surface of chalcopyrite was comprehensively investigated using UV-vis spectra, zeta-potential, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy measurements (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), and first principles calculations. The experimental and computational results consistently demonstrated that AMT would chemisorb onto the chalcopyrite surface by the formation of a five-membered chelate ring. The first principles periodic calculations further indicated that AMT would prefer to adsorb onto Cu rather than Fe due to the more negative adsorption energy of AMT on Cu in the chalcopyrite (001) surface, which was further confirmed by the coordination reaction energies of AMT-Cu and AMT-Fe based on the simplified cluster models at a higher accuracy level (UB3LYP/Def2-TZVP). The bench-scale results indicated that the selective index improved significantly when using AMT as a chalcopyrite depressant in Cu-Mo flotation separation.

show abstract

Section: Resultsmentioning

confidence: 98%

“…Besides, Chandler and Walker had reported that the surface hydrophobicity of chalcopyrite should be ascribed to the exposed copper−sulfur (Cu−S)-rich and S-rich layer resulted from the oxidation of chalcopyrite surface. 73,74 This issue has not been included in this work and would be further considered in the future.…”

Section: Resultsmentioning

confidence: 99%

Adsorption Mechanism of 4-Amino-5-mercapto-1,2,4-triazole as Flotation Reagent on Chalcopyrite

Yin

Sun

et al. 2018

Langmuir

View full text Add to dashboard Cite

show abstract

“…Chalcopyrite is known to exhibit inherent floatability yet thiol collectors are always used in the industrial applications for the separation of complex sulfide ores by flotation. In a complex sulfide ore flotation, the recovery of a particular sulfide mineral is usually affected by the choice of surface modifying agents and the collector [21]. The choice of collectors can be made on the basis of the mineralogy of the ore, metallurgical objectives, and the operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Pyrite in a Tailings Dam by Flotation

Ceylan¹,

Bulut²,

Göktepe³

2014

JMSE-B

View full text Add to dashboard Cite

Abstract:Pyrite is presented as a gangue mineral in most of complex sulphide ores and most of time it is removed as a tailing. However, beneficiation of pyrite from tailings could be important because of its economical value and the environmental concern. This paper presents a research for the enrichment of pyrite from copper plant tailings, Siirt-Madenköy/Turkey, by flotation. Siirt-Madenköy copper mine is operated by Park Electric Production Mining and Industry since 2005. In order to obtain the pyrite from Siirt-Madenköy copper plant tailings, laboratory test work has to be done to determine the type of reagents, the flowsheet and the size of plant. The objective of the company is to develop a pyrite flotation circuit for concentration of pyrite from tailing dam to obtain 750,000 tons/year pyrite concentrate. There are about 4 million tons tailings that containing pyrite in the tailings dam. Experiments were carried out with three different types of tailings from the plant and the pyrite concentrate with 46%Fe and 90% recovery has been obtained. Therefore, this study shows that high grade pyrite with high recovery can be recovered from the tailings.

show abstract

“…The interaction of the alkyl xanthate collectors with platinum and gold, copper, − lead, silver, , and mineral surfaces such as chalcocite, , pyrite and chalcopyrite, − galena, ,,, and a mixture of chalcocite and bornite has also been investigated. In these studies, both electrochemical techniques (cyclic voltammetry, − ,,,,, open circuit potential, , potential step, , nanoelectrogravimetric, and contact angle 10,13,14 measurements) and surface characterization techniques (Fourier transform infrared (FTIR) spectroscopy, ,,, X-ray photoelectron spectroscopy (XPS), ,,, surface-enhanced raman spectroscopy (SERS), and UV−visible spectroscopy 8,10,14 ) were employed to obtain insight into the nature of the electrochemical processes and to identify the products formed on the electrode surface under the different experimental conditions assayed. In general, the mechanisms by means of which the collectors act on the metal or mineral electrode surface can be expressed by the following global reactions: …”

Section: Introductionmentioning

confidence: 99%

“…2 The interaction of the alkyl xanthate collectors with platinum and gold, 3 copper, [3][4][5][6][7][8] lead, 9 silver, 10,11 and mineral surfaces such as chalcocite, 4,12 pyrite and chalcopyrite, [12][13][14] galena, 3,12,15,16 and a mixture of chalcocite and bornite 17 has also been investigated. In these studies, both electrochemical techniques (cyclic voltammetry, [2][3][4][5][6]9,10,12,13,17 open circuit potential, 4,10 potential step, 6,10 nanoelectrogravimetric, 6 and contact angle 10,13,14 measurements) and surface characterization techniques (Fourier transform infrared (FTIR) spectroscopy, 5,8,10,12 X-ray photoelectron spectroscopy (XPS), 7,11,15,16 surface-enhanced raman spectroscopy (SERS), 11 and UV-visible spectroscopy 8,…”

Section: Introductionmentioning

confidence: 99%

New Aspects of the Electroadsorption of Ethyl Xanthate on Copper Electrodes

et al. 2005

View full text Add to dashboard Cite

The interaction of the ethyl xanthate (EX) anion with a copper electrode in a borate buffer solution, pH 9.2, has been investigated by cyclic voltammetry (CV), electrochemical quartz crystal microbalance (EQCM), electrochemical impedance spectroscopy (EIS), and measurements of contact angle (CA) under controlled potential. The results obtained allow establishing that, in the potential range from -0.80 and -0.60 V, two parallel reactions were characterized. These reactions were the ethyl xanthate electroadsorption and the hydrogen evolution reaction (HER). This last reaction has not been described by previous authors. Besides, the EIS measurements show that the mechanism of the HER on copper electrodes is not affected by the presence of a ethyl xanthate species. The EQCM study shows that in the electrodesorption process the departure of each ethyl xanthate species from the copper electrode is accompanied with the simultaneous entry of four to five water molecules. This fact is in accordance with the number of copper atoms involved in the adsorption of one ethyl xanthate species.

show abstract

Effect of sulfur dioxide on flotation of chalcopyrite

Cited by 9 publications

References 8 publications

Adsorption Mechanism of 4-Amino-5-mercapto-1,2,4-triazole as Flotation Reagent on Chalcopyrite

Adsorption Mechanism of 4-Amino-5-mercapto-1,2,4-triazole as Flotation Reagent on Chalcopyrite

Evaluation of Pyrite in a Tailings Dam by Flotation

New Aspects of the Electroadsorption of Ethyl Xanthate on Copper Electrodes

Contact Info

Product

Resources

About