Adsorption of dithiophosphate and dithiophosphinate on chalcopyrite

Date

2006-01-01

Author

Guler, T
Hicyilmaz, C
Gokagac, G
Ekmeci, Z

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

281
views

0
downloads

Electrochemical behavior of chalcopyrite was investigated in the absence and presence of dithiophosphate (DTP) and dithiophosphinate (DTPI), selective thiols against Fe-sulfides in the flotation of sulfide ores, in potentiostatically controlled electrochemical condition. Diffuse reflectance Fourier transformation (DRIFT) spectroscopy was applied to determine the type of adsorbed collector species, and Hallimond tube flotation tests were performed to clarify the role of polarization potential and thiol collectors on the floatability of chalcopyrite. DRIFT spectroscopy study proposed that dithiolate of DTP, (DTP)(2), was the major surface compound formed under oxidizing potentials in slightly acidic and neutral conditions. However, DTP species formed on mineral surface in alkaline condition could not be determined possibly due to heavy surface coating of metal oxyhydroxides. DTPI species formed on chalcopyrite was found to be in the form of CuDTPI + (DTPI)(2). Additionally, presence of adsorbed DTPI, DTPI0, was also detected. Self-induced floatability was significantly high particularly in slightly acidic condition and decreased by increasing pH due to surface coating of metal oxyhydroxides. Addition of both collectors improved the flotation performance at all pH values. However, the positive effect of DTP at high alkaline pH values was lower than that of DTPI. This was attributed to weak collecting property and lower hydrocarbon chain length of DTP compared to DTPI. Effect of pulp potential could not be observed in slightly acidic condition, but it became apparent at higher pHs. Although better flotation responses were obtained in mildly oxidizing potentials, both collectors enlarged the floatability potential range of chalcopyrite.

Subject Keywords

Control and Systems Engineering, Geotechnical Engineering and Engineering Geology, Mechanical Engineering, General Chemistry

URI

https://hdl.handle.net/11511/67887

Journal

MINERALS ENGINEERING

DOI

https://doi.org/10.1016/j.mineng.2005.06.007

Collections

Department of Mining Engineering, Article

Suggestions

OpenMETU
Core

Quantifying hydrophobicity of pyrite after copper activation and DTPI addition under electrochemically controlled conditions Hicyilmaz, C; Altun, Naci Emre; Ekmekci, Z; Gokagac, G (Elsevier BV, 2004-07-01) In this study, the response of the surface of pyrite to copper activation under electrochemically controlled conditions was investigated in the presence and absence of sodium diisobutyl dithiophosphinate (DTPI). The mechanism of interactions between the concerned reagents and pyrite was investigated using cyclic voltarnmetry in solutions of different pH. In addition, contact angle measurements were performed to determine the wetting behavior of the pyrite surface as a function of pulp potential and pH. The ...
Adsorption of volatile organic compounds on soil and prediction of desorption breakthroughs Yeo, SD; Tuncer, E; Akgerman, A (Informa UK Limited, 1997-01-01) Vapor extraction of volatile organic compounds from soil was investigated by performing adsorption and desorption experiments of trichloroethylene, trichloroethane, and chlorobenzene on soil particles. The adsorption breakthrough curves were obtained using a dynamic response technique based on frontal analysis chromatography. The shape of the breakthrough curves indicated that the adsorption process was close to an ideal adsorption system of no mass transfer resistance, no axial dispersion, and infinitesima...
Electrochemical behaviour of chalcopyrite in the absence and presence of dithiophosphate Güler, Taki; Hiçyılmaz, Cahit; Gökağaç, Gülsün; Ekmekçi, Zafir (Elsevier BV, 2005-02-07) Electrochemical behaviour of chalcopyrite was investigated in collectorless condition and in the presence of dithiophosphate (DTP), which is a selective collector for chalcopyrite, by cyclic voltammetry (CV) study. Diffuse Reflectance Infrared Fourier Transformation (DRIFT) spectroscopy was employed to identify surface species of DTP at chalcopyrite surface. CV tests established the certain degree of irreversibility in the absence of DTP possibly due to preferential dissolution of iron ions in slightly acid...
Hydrometallurgical processing of nontronite type lateritic nickel ores by MHP process Kose, C. H.; Topkaya, Yavuz Ali (Elsevier BV, 2011-04-01) The research work presented in this paper determined the optimum conditions at which nickel and cobalt could be obtained at maximum efficiency from the column leach liquor of the lateritic nickel ore existing in Gordes region of Manisa in Turkey by performing effective hydrometallurgical methods. This column leach solution was initially neutralized and purified from its basic impurities by a two-stage iron removal process, nickel and cobalt were precipitated in the form of mixed hydroxide precipitate from t...
Ternary-mixture grinding of ceramic raw materials Ipek, H; Ucbas, Y; Hoşten, Çetin (Elsevier BV, 2005-01-01) Batch experiments were carried out on the dry ball milling of commonly used ceramic raw materials quartz, kaolin and feldspar, singly and as ternary mixtures. The modified form of the Charles energy-size reduction equation was used to calculate the energy consumed by each of the components in the mixture. The results confirmed the validity of the mass fraction hypothesis for energy split between the components that had been defined and verified for the binary mixtures of equal-density minerals. The distribu...

Citation Formats

T. Guler, C. Hicyilmaz, G. Gokagac, and Z. Ekmeci, “Adsorption of dithiophosphate and dithiophosphinate on chalcopyrite,” MINERALS ENGINEERING, pp. 62–71, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67887.