Taki Güler

Marble dust generated during slab cutting as reject causes significant environmental problems due to increased reactive surface area. It has closer size distribution with micronized quartz filler used in composite slab. Owing to its high hardness, micronized quartz production is an energy intensive process. This study was conducted to investigate t...

Calcite, being the most abundant mineral on earth crust, have wide application areas especially in polymer industry as a micronized functional filler material. It is hydrophilic in natural form, and made hydrophobic after surface modification to meet the requirements of polymer industry: the incompatibility between high energetic hydrophilic surfac...

Calcite, being the most abundant mineral on earth crust, have wide application areas especially in polymer industry as a micronized functional filler material. It is hydrophilic in natural form, and made hydrophobic after surface modification to meet the requirements of polymer industry: the incompatibility between high energetic hydrophilic surfac...

Electrochemical potential determines types of redox products formed on electrically conducting minerals like galena, which might manipulate process efficiency applied on the target mineral. Therefore, electrochemical behavior of galena has utmost importance for flotation and hydrometallurgical applications. This study was performed to elucidate red...

This study was performed to elucidate the role of ovalbumin (OVA) on the hydrophobicity and potential response of galena in the presence of dithiophosphinate (DTPI). OVA was tested as environmentally friendly depressing agent due to its electrochemically active behavior in aqueous medium. Contact angle measurements were performed in a three-electro...

Market price of industrial minerals depends on the purity of products, and increases almost exponentially with the decrease in grade of coloring impurities. Therefore, this work was conducted to investigate the applicability of dry/wet high gradient magnetic separation (HGMS) and bleaching methods on the rejection rate of coloring impurities from b...

It is aimed in the symposium to discuss innovations and use of new techniques in mining applications concerning environment, to share novel improvements in the earth crust with professionals from the mining industry, to identify engineering problems and, finally, to make suggestions. WEB PAGE: www.isme.org.tr

It is aimed in the symposium to discuss innovations and use of new techniques in mining applications concerning environment, to share novel improvements in the earth crust with professionals from the mining industry, to identify engineering problems and, finally, to make suggestions. WEB PAGE: www.isme.org.tr

Pirit, birçok kompleks cevher yapısında gang minerali olarak bulunduğu için flotasyon devrelerinden atılması gerekir. Bunun için geleneksel inorganik düzenleyicilere alternatif olarak organik yapılı reaktifler kullanılmıştır. Tannik Asit (TA) ve Ovalbumin (OVA) literatürde az bilinmeleri sebebi ile deneysel çalışmalarda pirit hidrofobluğuna olan et...

Potential response of pyrite in an electrochemically active environment was supposed to shed light on its redox behavior in the presence of Cu⁺², Pb⁺² and Fe⁺² ions, the commonly existing metal ions in fotation pulps of complex sulfide ores. This study was conducted to elucidate the effect of metal ions on the electrochemical behavior of pyrite. Mi...

Albite (NaAlSi3O8) is an important industrial mineral especially for ceramic and glass production. Major Fe-containing impurity of albite ore is flaky mica minerals. This study was conducted to determine the applicability of pinched sluicing for pre-concentration of albite ore by exploiting shape effect. Effects of feed solid rate, tilting angle of...

Potential response of pyrite in an electrochemically active environment was supposed to shed light on its redox behavior in the presence of Cu+2, Pb+2 and Fe+2 ions, the commonly existing metal ions in flotation pulps of complex sulfide ores. This study was conducted to elucidate the effect of metal ions on the electrochemical behavior of pyrite. M...

This study was performed to determine the effect of tannic acid (TA) on hydrophobicity of galena using Taguchi’s design of experimental methodology. Roles of metal ions, dithiophosphinate (DTPI) concentration, and conditioning time on TA-galena interaction were tested by contact angle measurements. Results were evaluated by analysis of variance (AN...

Recovery of gangue pyrite and its accidental activation are vital issues in flotation of complex sulfide ores. This work was performed by cyclic voltammetry (CV) and flotation tests to elucidate applicability of ovalbumin (OVA) as depressant for pyrite. The synergetic effect of metal ions in addition to its possible use in case of accidental activa...

Ovalbumin (OVA), chicken egg albumin, is an environmentally friendly, non-toxic, cheap surface active agent. It has electrochemically active sulfhydryl residues in molecular structure. OVA adsorption on pyrite as an alternative depressant was investigated by cyclic voltammetry, FTIR spectroscopy and flotation. Tests were conducted in a wide potenti...

The role of several parameters on gangue recovery in froth was investigated. Effects of frother type and collector dosage on flotation performance were tested at pH 10. The results were evaluated statistically by twoway analysis of variance without replicates, sample range and sample standard deviation. Hydrophilic mineral was recovered mainly by e...

Electrochemistry of Cu-activation of pyrite was investigated in the absence and presence of dithiophosphinate-DTPI by FTIR spectroscopy tests. Results proposed that the major surface compound was ferric-oxyhydroxides which restrict the collector adsorption on pyrite surface. But, adsorption of DTPI could be distinguished: FTIR spectroscopy study pr...

Consumption of base metals has been increasing continuously in parallel with the technological improvements over the world. This demand has resulted in the need to enhance processing of complex sulfide ores, which are the primary sources of base metals. Complex sulfide ores are concentrated mainly through flotation. Sulfide minerals are semiconduct...

Electrochemistry of chalcopyrite was investigated using cyclic voltammetry technique at four different pH values. The voltammetry experiments were performed at different anodic switching potentials and scan rates to elucidate the state of reversibility and the kinetics of the electrochemical reactions. The results revealed that oxidation-reduction...

The effect of ferrous and ferric ions on pyrite-xanthate interaction was investigated with contact angle measurements and UV-visible spectroscopy studies. Experimental works were conducted in chemically manipulated electrochemical conditions between 0-500 mV potential ranges. KMnO4 and Na2S2O5 were used to manipulate potential as oxidizing and redu...

The pulp potential of galena, chalcopyrite and pyrite have been measured in parallel with Pt and mineral electrodes by controlling the potential with oxidizing (H2O2 and K2Cr2O7) and reducing (Na2S and Na2S2O4) agents under “free to change conditions” to follow the adaptability of different electrodes to the dynamically changing conditions. It has...

The roles of pulp potential, collector and depressants on the flotation of pyrite, chalcopyrite and galena were studied by using two-liquid flotation technique. The potential was adjusted by reducing (Na2S and Na2S2O4) and oxidizing (H2O2) agents. Cyanide and chromate were employed as depressants and potassium amyl xanthate was used as sulphydryl t...

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...

Role of treatment on the electrochemistry of dithiophosphate (DTP) adsorption on chalcopyrite was investigated by cyclic voltammetry (CV) technique. Measurements were made in slightly acid, neutral and alkaline conditions. DTP covered minerals surface as dithiolate, (DTP)2, and inhibited chalcopyrite oxidation at a certain rate especially in slight...

This research was performed to elucidate the role of DTP and Fe ions on the hydrophobicity and floatability of pyrite in chemically controlled electrochemical conditions between 0-500 mV vs. SHE. Experimental works suggested that hydrophobicity and floatability decreased by increasing the pulp potential in collectorless condition, which resulted fr...

The electrochemistry of dithiophosphinate (DTPI) adsorption on pyrite was investigated by cyclic voltammetry (CV) and diffuse reflectance infrared Fourier transformation (DRIFT) spectroscopy at oxidizing potentials under acid, neutral, and alkaline conditions. CV study showed that the mineral surface was covered by porous ferric oxyhydroxide specie...

The main aim of a flotation process is to recover the valuable part of the ore with minimum gangue contamination by different mechanisms, such as entrainment. In this study, the flotation rate and recovery of talc and entrainment of fine calcite particles were investigated using individual minerals and a mixture of talc and calcite. The effects of...

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 chalcopyrit...

The mechanism of dithiophosphinate (DTPI) adsorption on chalcopyrite was investigated by diffuse reflectance Fourier transformation (DRIFT) spectroscopy and by cyclic voltammetry (CV) at various pHs. CV experiments showed that the redox reactions occurred at a certain degree of irreversibility on the chalcopyrite surface in the absence of a collect...

The degree of hydrophobicity of chalcopyrite was determined by contact angle measurements on polished chalcopyrite surface in electrochemically controlled conditions. Results have shown that the increase in solution pH adversely affect hydrophobicity due to heavy surface oxidation. Maximum contact angles were measured at moderately oxidizing potent...

A study on collectorless flotation of lead and zinc sulphide present in the Derekoy ore in the presence of sodium sulphide was performed. The parameters of the process and influence of sodium sulphide, zinc sulphide, conditioning time, pH and cleaning of concentrate were investigated. The results were compared with collector added flotation using s...