Electrochemical behaviour of chalcopyrite in the absence and presence of dithiophosphate

Date

2005-02-07

Author

Güler, Taki
Hiçyılmaz, Cahit
Gökağaç, Gülsün
Ekmekçi, Zafir

Metadata

Show full item record

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

Item Usage Stats

187
views

0
downloads

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 solution, and irreversible surface coverage by iron hydroxides in neutral and alkaline solutions. Cu(DTP)+(DTP)(2) formation as major DTP-compounds on chalcopyrite in slightly acid and neutral conditions was estimated from DRIFT spectroscopy study. However, heavy surface oxidation inhibited the identification of collector species in alkaline condition.

Subject Keywords

Geotechnical Engineering and Engineering Geology, Geochemistry and Petrology

URI

https://hdl.handle.net/11511/67753

Journal

INTERNATIONAL JOURNAL OF MINERAL PROCESSING

DOI

https://doi.org/10.1016/j.minpro.2004.08.009

Collections

Department of Mining Engineering, Article

Suggestions

OpenMETU
Core

Adsorption of dithiophosphate and dithiophosphinate on chalcopyrite Guler, T; Hicyilmaz, C; Gokagac, G; Ekmeci, Z (Elsevier BV, 2006-01-01) 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 colle...
Estimation of Hardgrove grindability index of Turkish coals by neural networks Ozbayoglu, Gulhan; ÖZBAYOĞLU, AHMET MURAT; Ozbayoglu, M. Evren (Elsevier BV, 2008-01-31) In this research, different techniques for the estimation of coal HGI values are studied. Data from 163 sub-bituminous coals from Turkey are used by featuring I I coal parameters, which include proximate analysis, group maceral analysis and rank. Nonlinear regression and neural network techniques are used for predicting the HGI values for the specified coal parameters. Results indicate that a hybrid network which is a combination of 4 separate neural networks gave the most accurate HGI prediction and all of...
Alteration of permeability by drilling fluid invasion and flow reversal Iscan, A. Gurkan; Civan, Faruk; Kök, Mustafa Verşan (Elsevier BV, 2007-08-01) Permeability impairment caused by drilling fluids and subsequent cleaning and permeability enhancement by backflow are investigated by means of experimental and simulation studies. Damage caused by two different drilling fluids is measured experimentally by core tests as a function of the filtration pressure and analyzed using a simulator describing the fines migration and retention in porous media. Simulations were run both with experimental and synthetic data in forward and backward directions along the c...
EFFECT OF PHENOL AND RESORCINOL ON LEACHING OF ILMENITE WITH HCL-CH3OH AND HCL-C2H5OH SOLUTIONS GIRGIN, I; Türker, Burhan Lemi; GOODALL, D (Elsevier BV, 1991-07-01) The effects of phenols on hydrochloric acid leaching of metal oxides is investigated theoretically. A mathematical model is developed for the early stages of leaching assuming that steady state conditions and Fick's first law are valid for the formation and diffusion of metal cations through the Helmholtz-Stern interface. It is found theoretically that the leaching rate is exponentially proportional to acid and phenol concentrations and any metal-phenol complex which can be decomposed by chloride ions shoul...
CPT-based probabilistic and deterministic assessment of in situ seismic soil liquefaction potential Moss, R. E. S.; Seed, R. B.; Kayen, R. E.; Stewart, J. P.; Kiureghian, A. Der; Çetin, Kemal Önder (American Society of Civil Engineers (ASCE), 2006-08-01) This paper presents a complete methodology for both probabilistic and deterministic assessment of seismic soil liquefaction triggering potential based on the cone penetration test (CPT). A comprehensive worldwide set of CPT-based liquefaction field case histories were compiled and back analyzed, and the data then used to develop probabilistic triggering correlations. Issues investigated in this study include improved normalization of CPT resistance measurements for the influence of effective overburden stre...

Citation Formats

T. Güler, C. Hiçyılmaz, G. Gökağaç, and Z. Ekmekçi, “Electrochemical behaviour of chalcopyrite in the absence and presence of dithiophosphate,” INTERNATIONAL JOURNAL OF MINERAL PROCESSING, pp. 217–228, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67753.