Yavuz Ali Topkaya

E-mail
topkaya@metu.edu.tr
Department
Department of Metallurgical and Materials Engineering
Smelting Studies for Recovery of Iron from Red Mud
KESKİNKILIÇ, ENDER; Pournaderi, Saeid; Geveci, Ahmet; Topkaya, Yavuz Ali (2019-01-01)
Red mud can be regarded as a by-product of aluminium extraction process since it contains a significant amount of iron and some valuable elements. Therefore, the treatment of red mud has been a hot topic for some decades. ...
USE OF COLEMANITE IN FERRONICKEL SMELTING
KESKİNKILIÇ, ENDER; Pournaderi, S.; Geveci, Ahmet; Topkaya, Yavuz Ali (2019-01-01)
Use of colemanite in metal-slag systems aims primarily to decrease the viscosity of slag and, therefore, achieve better metal-slag separation. Enhanced metal-slag separation is helpful to decrease the number of suspended m...
Solvent extraction behaviour of scandium from lateritic nickel-cobalt ores using different organic reagents
Ferizoglu, Ece; Kaya, Serap; Topkaya, Yavuz Ali (2018-04-01)
Scandium is one of the most important and strategic metals that can be recovered as a by-product from lateritic nickel-cobalt ores. In this research, different extractants were investigated to extract scandium from sulphat...
Laboratory-scale smelting of limonitic laterite ore from Central Anatolia
Pournaderi, S.; KESKİNKILIÇ, ENDER; Geveci, Ahmet; Topkaya, Yavuz Ali (2017-07-01)
The feasibility of ferronickel production from a low-grade limonitic laterite ore was investigated. The ore was first calcined and then prereduced in the solid state. The reduced ore was then smelted to produce ferronickel...
Volume combustion and mechanochemical syntheses of LaB6
Akgun, Baris; Sevinc, Naci; ÇAMURLU, HASAN ERDEM; Topkaya, Yavuz Ali (2017-01-01)
LaB6 powder was produced by volume combustion synthesis (VCS) and mechanochemical synthesis (MCS) methods, through magnesiothermic reduction of La2O3 and B2O3 powders. VCS was achieved by rapid heating of the reactant mixt...
Solvent extraction of scandium from lateritic nickel- cobalt ores using different organic reagents
Ferizoglu, Ece; Kaya, Serap; Topkaya, Yavuz Ali (2016-09-28)
Scandium is the most important and strategic metal that can be recovered as a by-product from lateritic nickel-cobalt ores. In this research, different extractants were investigated in order to extract scandium from a sulf...
Investigation of Copper Losses to Synthetic Slag at Different Oxygen Partial Pressures in the Presence of Colemanite
RÜŞEN, AYDIN; Derin, Bora; Geveci, Ahmet; Topkaya, Yavuz Ali (2016-09-01)
Copper losses to slag are crucial for copper matte smelting and converting stages. One factor affecting the copper losses to slag during these processes is partial pressure of oxygen. In this study, theoretical and experim...
Effects of Some Additives on Copper Losses to Matte Smelting Slag
RÜŞEN, AYDIN; Geveci, Ahmet; Topkaya, Yavuz Ali; Derin, Bora (2016-09-01)
Copper is lost to slag between 0.7 and 2.3 wt.% during the industrial copper matte smelting stage. In the present study, the aim was to minimize these losses in the slag phase by adding some fluxing agents like CaO, B2O3 a...
A STUDY ON THE CHARACTERIZATION OF NICKEL LATERITES OF CENTRAL ANATOLIA
KESKİNKILIÇ, ENDER; Pournaderi, Saeid; Geveci, Ahmet; Topkaya, Yavuz Ali (2016-02-18)
There are mainly three commercial nickel laterites in Turkey: Gordes, Caldag and Sivrihisar. The first two appear in Western Anatolia. The third one, Sivrihisar (Yunusemre) laterites have been found in the first decade of ...
Pressure acid leaching of Caldag lateritic nickel ore: An alternative to heap leaching
Onal, Mehmet Ali Recai; Topkaya, Yavuz Ali (Elsevier BV, 2014-02-01)
In this study, the leachability of Caldag lateritic nickel ore under high pressure acid leaching (HPAL) conditions was investigated. Several HPAL parameters were tested in a comparative manner since in many cases, the extr...
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