Quantifying hydrophobicity of pyrite after copper activation and DTPI addition under electrochemically controlled conditions

Hicyilmaz, C
Altun, Naci Emre
Ekmekci, Z
Gokagac, G
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 results of both the cyclic voltammetry and contact angle measurements were evaluated to identify the nature of the species formed at the pyrite surface and to explain the underlying mechanism. Both phases of the experiments confirmed that the mechanism of copper activation of pyrite occurred through certain electrochemical reactions, whereas the mutual interactions between DTPI-pyrite and Cu-DTPI couples relied on chemical means.


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...
Effect of heat treatment on grindabilities of celestite and gypsum and separation of heated mixture by differential grinding
Sener, S; Bilgen, S; Ozbayoglu, G (Elsevier BV, 2004-03-01)
This study was conducted to determine thermal decomposition of gypsum (CaSO4 . 2H(2)O) and celestite (SrSO4), to examine the effect of heating on grindability and the possibility of celestite-gypsum separation by differential grinding after heating. The results indicated that no significant decomposition reaction was observed in celestite up to 900 degreesC whereas the decomposition of gypsum occurred within 100-450 degreesC.
Extraction of cobalt and copper from Küre pyrite concentrate
Çokgör, O.; Topkaya, Yavuz Ali (Elsevier BV, 1988)
Three methods were investigated for the extraction of cobalt, copper and gold from Kure pyrite concentrate. These were chloridizing roasting, chloridizing volatilization and sulphating roasting processes. For chloridizing roasting, the pyrite concentrate was dead roasted first to adjust sulfur content to about 4%. Then, the pyrite cinder obtained was mixed with NaCl and pyrite concentrate, and roasted to produce soluble chlorides of copper and cobalt. For chloridizing volatilization, copper, cobalt and g...
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...
Evaluation of the performance of the face slab of a CFRD during earthquake excitation
Arıcı, Yalın (Elsevier BV, 2013-12-01)
The primary goal of this study was to examine the cracking behavior of the face plate of a CFRD during earthquake excitation. Analyses of the impounding stage and earthquake loading were conducted in sequential phases using a 2-D plane-strain model with the appropriate non-linear constitutive relationships for the dam constituents. The effect of rockfill stiffness and the face plate design properties on the seismic performance of the face plate was investigated. The crack widths on the plate increased with ...
Citation Formats
C. Hicyilmaz, N. E. Altun, Z. Ekmekci, and G. Gokagac, “Quantifying hydrophobicity of pyrite after copper activation and DTPI addition under electrochemically controlled conditions,” MINERALS ENGINEERING, pp. 879–890, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40554.