Keskinkılıç, Ender

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https://hdl.handle.net/20.500.14411/7004
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Keskinkılıç, Ender
Ender, Keskinkilic
Keskinkilic, Ender
E., Keskinkilic
Ender, Keskinkılıç
Keskinkiliç E.
E.,Keskinkılıç
Keskinkılıç,E.
Keskinkilic E.
Keskinkilic, E.
E.,Keskinkilic
K., Ender
K.,Ender
E., Keskinkılıç
Keskinkilic,E.
Job Title
Profesor Doktor
Email Address
ender.keskinkilic@atilim.edu.tr
Main Affiliation
Metallurgical and Materials Engineering
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Scopus Author ID
6504342315
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
GDN-8982-2022

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AFFORDABLE AND CLEAN ENERGY
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31

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155

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Scholarly Output

30

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WoS Citation Count

117

Scopus Citation Count

149

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WoS Citations per Publication

3.90

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JournalCount
Journal of the Southern African Institute of Mining and Metallurgy4
Journal of Mining and Metallurgy, Section B: Metallurgy3
11th International Symposium on High-Temperature Metallurgical Processing -- FEB 23-27, 2020 -- San Diego, CA2
Minerals, Metals and Materials Series2
4th International Symposium on High-Temperature Metallurgical Processing held during the 142nd TMS Annual Meeting and Exhibition -- MAR 03-07, 2013 -- San Antonio, TX1
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  • Thumbnail Image
    Conference Object
    Citation - WoS: 2
    Citation - Scopus: 2
    A Study on Recovery of Iron from Red Mud by Solid State Reduction Followed by Magnetic Separation
    (Springer international Publishing Ag, 2020) Eray, Said; Keskinkilic, Ender; Varol, Mustafa; Topkaya, Yavuz A.; Geveci, Ahmet
    Red mud is a waste material of the Bayer process for alumina production from bauxite ore. Red mud is generally pumped to disposal in an artificial pond which is accompanied by great land occupation and environmental issues. Many researches in different fields have been carried out to evaluate the red mud. Of these, researches on recovering valuable metals from red mud are the most successful. In this study, recovery of iron, which is the most abundant metal in red mud, was investigated. A red mud sample with 34% Fe2O3 was used. Solid state carbothermic reduction followed by wet magnetic separation was performed to recover iron. Reduction was carried out at temperatures 1000-1200 degrees C. Reduced samples were ground and subjected to wet magnetic separation. The effect of reduction temperature and grinding time were investigated on the metallization of iron and the iron content of the final concentrate.
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    Conference Object
    Citation - WoS: 1
    A Statistical Analysis of Process Abnormalities in Slab Casting
    (Springer international Publishing Ag, 2018) Keskinkilic, Ender
    Continuous casting of slabs is conducted with two successive steel flows: first from ladle to tundish, then from tundish to mold. There are certain process abnormalities related to ladle, tundish and mold. For example, change of submerged entry nozzle (SEN) is the one encountered during steel flow from tundish to mold. Tundish exchange is the abnormality taking place due to replacement of processed tundish with the new one at rest. Another example is the flow of steel from ladle to tundish without a ladle shroud. In this study, a statistical analysis was conducted related to the process abnormalities in slab casters of a steel plant. Slab surface defects observed in slab yard was incorporated in this analysis.
  • Thumbnail Image
    Conference Object
    Citation - WoS: 2
    Citation - Scopus: 2
    Solid-State Reduction Studies for Recovery of Iron From Red Mud
    (Springer international Publishing Ag, 2020) Keskinkilic, Ender; Pournaderi, Saeid; Geveci, Ahmet; Topkaya, Yavuz A.
    Red mud or bauxite residue can be regarded as a by-product of aluminum 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. Last year, the authors started a laboratory-scale project dealing with stepwise recovery of valuable elements from red mud of Seydisehir Aluminum Plant, Turkey. The first step is related to the recovery of iron and pyrometallurgical methods (solid-state reduction and smelting) are currently being performed. Nonferrous metals will then be selectively leached in the second step. In TMS 2019, the authors outlined the literature related to the smelting studies for iron recovery from bauxite residue. In the extent of the present work, a literature review relevant to the solid-state reduction studies for recovery of iron from red mud was presented.
  • Thumbnail Image
    Conference Object
    Citation - Scopus: 1
    A Statistical Analysis of Process Abnormalities in Slab Casting
    (Springer International Publishing, 2018) Keskinkilic,E.
    Continuous casting of slabs is conducted with two successive steel flows: first from ladle to tundish, then from tundish to mold. There are certain process abnormalities related to ladle, tundish and mold. For example, change of submerged entry nozzle (SEN) is the one encountered during steel flow from tundish to mold. Tundish exchange is the abnormality taking place due to replacement of processed tundish with the new one at rest. Another example is the flow of steel from ladle to tundish without a ladle shroud. In this study, a statistical analysis was conducted related to the process abnormalities in slab casters of a steel plant. Slab surface defects observed in slab yard was incorporated in this analysis. © 2018, The Minerals, Metals & Materials Society.
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    Article
    Citation - WoS: 9
    Citation - Scopus: 11
    Reducibility of Nickeliferous Limonitic Laterite Ore From Central Anatolia
    (Taylor & Francis Ltd, 2014) Pournaderi, S.; Keskinkilic, E.; Geveci, A.; Topkaya, Y. A.
    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 studied using X-ray diffraction. The metallisation of Fe was found to be limited up to 900 degrees C, but increased rapidly at higher temperatures. The metallisation of Ni and Co increased when the temperature was increased from 700 to 800 degrees C, almost levelled off up to 900 degrees C and then increased up to 1100 degrees C. The results also showed that increased coal additions did not affect Fe metallisation up to 900 degrees C. At 1000 degrees C the metallisation of Fe became slightly better, but its effect was more pronounced at 1100 degrees C. The increased coal addition affected the nickel reduction equally at all temperatures, while it had no effect on the metallisation of Co.
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    Editorial
    Preface: The 17th International Symposium on Boron, Borides and Related Materials ISBB 2011
    (Springer International Publishing, 2019) Jiang, Tao; Hwang, Jiannyang; Gregurek, Dean; Peng, Zhiwei; Downey, Jerome P.; Zhao, Baojun; Padilla, Rafael
  • Thumbnail Image
    Article
    Citation - WoS: 6
    Citation - Scopus: 7
    Recovery of Iron From Turkish and Iranian Red Muds
    (Springer, 2022) Eray, Said; Keskinkilic, Ender; Topkaya, Yavuz A.; Geveci, Ahmet
    Turkish and Iranian red mud samples of different composition and mineralogy were processed by solid-state reduction followed by wet magnetic separation and smelting, two commonly used pyrometallurgical methods for iron recovery. The application of these two methods on the same samples allowed them to be compared thoroughly and to be examined for versatility. The results showed that it was possible to recover more than 90% of iron using both methods. However, the concentrate obtained by the first method contained a significant amount of undesirable oxides. Thus, large proportions (similar to 30%) of valuable elements that are planned to be recovered by hydrometallurgical methods were removed together with the iron. The smelting method, on the other hand, made it possible to recover the iron with high efficiency and as a marketable purity Fe-C alloy. The metal obtained by smelting contained 96% iron, 2% carbon, and a small amount of impurities like Si, Ti, and Na.
  • Thumbnail Image
    Conference Object
    Citation - Scopus: 3
    Study of Certain Parameters in Laboratory-Scale Smelting of Sivrihisar Laterite Ores of Turkey
    (Minerals, Metals and Materials Society, 2012) Keskinkilic,E.; Pournaderi,S.; Geveci,A.; Topkaya,Y.A.
    Conventional ferronickel smelting has five main steps: Drying, calcination, prereduction, smelting and refining. In the scope of the current work, smelting experiments were conducted using Sivrihisar laterite ores (1.26% Ni) of Turkey. The ore samples previously subjected to drying, calcination and prereduction stages were smelted in alumina crucibles in a laboratory-scale horizontal tube furnace under argon atmosphere. Smelting experiments were performed at 1500, 1550 and 1600°C. The amount of excess coal used in prereduction step was another variable. Sivrihisar laterite ore is a limonitic one with low MgO composition. Therefore, MgO was added to the smelting charge as a flux. The effects of experimental variables on metal Ni content and slag composition were investigated.
  • Thumbnail Image
    Conference Object
    Citation - Scopus: 2
    Production of Crude Ferronickel From Sivrihisar Laterite Ores of Turkey
    (Minerals, Metals and Materials Society, 2013) Keskinkilic,E.; Pournaderi,S.; Geveci,A.; Topkaya,Y.A.
    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 crucibles in a horizontal tube furnace under argon atmosphere. For the smelting system used in the present work, 1550°C and 40 minutes were determined to be the optimum smelting temperature and time, respectively. 25% excess coal addition in prereduction stage was reported to be crucial to obtain the desired Ni content in the final product. Colemanite in calcined form has long been known as a flux used in pyrometallurgical systems such as steelmaking and copper matte-smelting. To investigate the effects of calcined colemanite addition on the ferronickel metal-slag system, calcined colemanite of 2% and 4% of the total metal and slag weight was charged as a flux and smelted under the optimum conditions described above.
  • Thumbnail Image
    Article
    Citation - WoS: 4
    Citation - Scopus: 5
    Reduction Behavior of Iron in the Red Mud
    (Technical Faculty, Bor-serbia, 2021) Eray, S.; Keskinkilic, E.; Topkaya, Y. A.; Geveci, A.
    Red mud or bauxite residue contains significant quantities of industrial metals such as Fe, Al, and Ti, as well as rare earth elements such as Sc, Ce, and La. The authors performed a laboratory-scale project dealing with stepwise recovery of valuable elements from two bauxite residues, namely Iranian red mud (IRM) and Turkish red mud (TRM). The first stage involved the recovery of iron which was present in large quantities in red mud. Two different methods were investigated for this purpose: 1) solid state reduction followed by wet magnetic separation and 2) smelting. In the scope of this paper, some results of pyrometallurgical part of this project are presented. According to solid-state reduction experiments, it was found that more excess coal was needed for IRM (35%) than for TRM (15%) to maximize iron reduction. Temperature had significant effect on the reduction process and metallization increased from about 70% to about 95% when the temperature was raised from 1000 to 1200 degrees C. Metallization degree was reported to be slightly higher for IRM (96.2%) than for TRM (94.1%). The results demonstrated that a high degree of iron metallization can be achieved regardless of the chemical and mineralogical composition of the bauxite residue sample.