Flotation Characteristics Of Minerals In Feldspar Ores

Download

index.pdf

Date

2012

Author

Özün, Savaş

Metadata

Show full item record

Item Usage Stats

189
views

198
downloads

Albite (Na-feldspar) and orthoclase (K-feldspar) are the major feldspar minerals used in the production of glass and ceramics. They are found together with impurities like biotite, muscovite, quartz and rutile which are not desired for ceramics and glass industries. Therefore, these have to be removed to make the ore available for industrial use. In order to shed light on the actual feldspar ores, in this study; the flotation characteristics of albite, biotite, muscovite, orthoclase, quartz and rutile were investigated separately in their pure forms. In the investigation, the electrokinetic potential measurements and micro-flotation studies have been carried out to get information about their flotation characteristics under the effect of three different collectors, Aero 704, Aero 3000C and Aero 825, and the pH of the medium. The flotation recoveries were found to be pH dependent and the effective between the pH range of 7.0 and 11.5 in the presence of Aero 704. In the case of flotation with Aero 3000C, the recoveries reached up to 95.0% at certain concentrations and pH values and decreased sharply below pH 3.0 and above pH 9.5 for all the minerals tested. In the presence of Aero 825, the flotation recoveries of the minerals except for rutile, were found to be insufficient even with its highest concentration. In order to evaluate the adsorption mechanism of the collectors, Atomic Force Microscopy (AFM) and Fourier Transform Infrared Spectroscopy (FTIR) analyses were carried out. From the AFM results it might be deduced that the behavior of Aero 3000C and Aero 825 was found to be almost similar for biotite and muscovite as monolayer adsorption and for the remaining minerals, albite, orthoclase, quartz and rutile, as monolayer and bilayer adsorption together. In the case of Aero 704, for albite and orthoclase, the adsorption of the collector might be the reason for monolayer and bilayer formation on their surfaces. The strength of the interaction of the collectors on the mineral surfaces was followed by FTIR analyses before and after acetone washing. The interaction of all the collectors was found to be weak in the case of albite, orthoclase, quartz and rutile whereas the interaction of Aero 704 and Aero 3000C was found to be strong in the case of biotite and muscovite.

Subject Keywords

Nonmetallic Minerals.

URI

http://etd.lib.metu.edu.tr/upload/12614273/index.pdf
https://hdl.handle.net/11511/21488

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Intermetallic phase formation at Fe-Al film interfaces Temizel, Güvenç; Özenbaş, Ahmet Macit (2007-04-20) An Fe-Al thin film system was studied for the purpose of examining the formation and development of intermetallic phases, which were formed at the aluminum (Al) film-steel substrate interfaces. Al films having different initial thicknesses in the range of 2μ,14μm were deposited by physical vapor deposition and were then annealed at different temperatures (range: 300-650 °C) and for different time intervals (10 min-8 h). In order to explain the formation mechanisms of the intermetallics at the mentioned Al-F...
Atomic size effect of alloying elements on the formation, evolution and strengthening of gamma'-Ni3Al precipitates in Ni-based superalloys Eriş, Rasim; Akdeniz, Mahmut Vedat; Mehrabov, Amdulla (2019-06-01) Mechanical properties of Ni-based superalloys strongly depend on phase and site preferences of alloying elements which influence bonding strength within gamma'-Ni3Al precipitates and microstructural characteristics of these unique class of materials. In the current work, therefore, besides disclosure of the phase partitioning behaviours of alloying X elements (i.e. X = Co, Cr, Nb, Ta or Ti) among gamma' and gamma phases, their site occupancy tendencies in gamma' precipitates (determined via first-principles...
Dry sliding wear behaviour of Al-Fe-Si-V alloys at elevated temperatures Koraman, Emrah; Baydoğan, Murat; Sayilgan, Seda; Kalkanlı, Ali (2015-01-15) High temperature strength of Al-Fe-V-Si alloys due to quaternary silicide dispersoids in their microstructures has been well documented in the literature. In those works, these materials have been shown as promising candidates to compete with titanium alloys at elevated temperatures. However, there is a lack of information on elevated temperature wear behaviour of those materials, which should be one of the main considerations at elevated temperature use. In order to contribute to this field, dry sliding we...
Metal Oxides Supported Cobalt nanoparticles: Active Electrocatalysts for Oxygen Evolution Reaction Önal, Ahmet Muhtar; Akbayrak, Merve (2021-08-01) Besides precious metal oxides, non-noble metal oxides are found to be promising materials especially, in the alkaline medium for OER. In this work, Co/MO 2 (M = Ti, Zr, and Ce) catalysts were synthesized with- out using any harsh steps such as pyrolization, annealing, calcination, and carbonization. Cobalt nanopar- ticles with ∼2.6 nm particle size were loaded on metal oxides by simple impregnation and reduction method. Considering the low onset and overpotential values, low Tafel slopes, high exchange curr...
Biomechanical Evaluation of an Injectable Alginate / Dicalcium Phosphate Cement Composites for Bone Tissue Engineering Alshemary, Ammar Z.; Bilgin, Saliha; Işık, Gülhan; Motameni, Ali; Tezcaner, Ayşen; Evis, Zafer (2021-06-01) Biocompatible dicalcium phosphate (DCP) cements are widely used as bone repair materials. In this study, we aimed to investigate the impact of different amounts of sodium alginate (SA) on the microstructural, mechanical, and biological properties of DCP cements. Beta-tricalcium phosphate (β-TCP) was prepared using a microwave-assisted wet precipitation system. Lattice parameters of the obtained particles determined from X-ray diffraction (XRD), were in good match with a standard phase of β-TCP. Scanning ele...

Citation Formats

S. Özün, “Flotation Characteristics Of Minerals In Feldspar Ores,” Ph.D. - Doctoral Program, Middle East Technical University, 2012.