Ahmet Geveci

E-mail
geveci@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...
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...
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 ...
Reducibility of nickeliferous limonitic laterite ore from Central Anatolia
Pournaderi, S.; KESKİNKILIÇ, ENDER; Geveci, Ahmet; Topkaya, Yavuz Ali (2014-01-01)
Limonitic nickel laterite from Sivrihisar reserve in Turkey was reduced at 700-1100 degrees C by the addition of 5.74, 8.61 and 11.48 wt-% coal under an argon atmosphere. The run-of-mine ore and the reduced samples were st...
PRODUCTION OF CRUDE FERRONICKEL FROM SIVRIHISAR LATERITE ORES OF TURKEY
KESKİNKILIÇ, ENDER; Pournaderi, Saeid; Geveci, Ahmet; Topkaya, Yavuz Ali (2013-03-07)
In the current work, laboratory-scale smelting experiments were conducted using Sivrihisar laterites (1.26% Ni). The ore samples previously subjected to drying, calcination and prereduction stages were smelted in alumina c...
Minimization of copper losses to slag in matte smelting by colemanite addition
Rusen, Aydin; Geveci, Ahmet; Topkaya, Yavuz Ali (2012-11-01)
In any copper production plant, more than two tons of slag is discarded with 0.7-2.3%Cu to produce each ton of copper. Therefore, minimizing copper losses is crucial during the copper matte smelting. In order to reduce the...
Calcination characteristics of laterite ores from the central region of Anatolia
KESKİNKILIÇ, ENDER; Pournaderi, S.; Geveci, Ahmet; Topkaya, Yavuz Ali (2012-10-01)
Drying, calcination, prereduction, and smelting are the main steps in conventional crude ferronickel production. Industrially, these steps are conducted using the rotary kiln-electric arc furnace (RKEF) process. In this pa...
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