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Öğe Beneficiation of Konya-BeyAYehir Chromite for Producing Concentrates Suitable for Industry(Springer, 2016) Ozturk, Fatma Deniz; Temel, Halime AbakayTurkey has a 6% share of world chromite mining and possesses 25 million tons of reserves. Despite their economic importance, the most important Turkish chromite reserves have not been extensively studied with respect to their composition. In this study, the possibility of upgrading Konya-BeyAYehir (Turkey) chromite to produce chromite concentrates suitable for industry is investigated. Two groups of enrichment experiments were made. The effects of some parameters that markedly influence the separation of a shaking table, such as the amplitude and slope of the shaking table and the frequency of strokes were investigated in the first group of experiments, The shaking table experiments were planned and carried out using the statistical methods of Design of Experiments (Yate's and ANOVA) in the second group of experiments. As a result, it was found that a concentrate containing 46.89% Cr2O3 content with a yield of 85.18% was obtained from a feed containing 3.98% Cr2O3 content in 0.2 + 0.1 mm size fraction.Öğe Bingöl (Yedisu), Diyarbakır (Hani ve Ergani) ve Elazığ (Alacakaya) kromlarının zenginleştirilmesi(Dicle Üniversitesi Mühendislik Fakültesi, 2014) Öztürk, Fatma Deniz; Temel, Halime AbakayBu çalışmada Bingöl (Yedisu), Diyarbakır (Hani ve Ergani) ve Elazığ (Alacakaya) kromlarının zenginleştirilmesi araştırılmıştır. Bu amaçla deneysel çalışmalar Bingöl-Yedisu, Diyarbakır-Hani- Ergani ve Elazığ-Alacakaya bölgelerinden alınan krom örnekleri üzerinde yapılmıştır. Öncelikle krom örneklerinin karakterizasyon çalışmaları ve elek analizleri yapılmıştır. Daha sonra farklı boyutlarda sınıflandırılan krom örnekleri sallantılı masa ile zenginleştirilmiştir. Yapılan çalışmalar sonucunda %45,24-46,33 Cr2O3 içeren konsantreler %87,70-89,10 verim değerleri ile elde edilmiştir.Öğe Desulfurization and deashing of Hazro coal by selective oil agglomeration in various water mediums(Amer Chemical Soc, 2006) Temel, Halime Abakay; Ayhan, Fatma DenizThe aim of this study was to study the effects of various water mediums on desulfurization and deashing of Hazro coal by the agglomeration method. For this purpose, three groups of agglomeration experiments were made. The effects of some parameters that markedly influence the effectiveness of selective oil agglomeration, such as solid concentration, bridging liquid concentration, and pH, on the agglomeration were investigated in the first group of experiments. The effects of different salts ( NaCl, MgCl2, and FeCl3) on the agglomeration were investigated in the second group of experiments. The effects of lake water and sea water on the agglomeration were investigated in the third group of experiments. The influences of the Mediterranean Sea water and Aegean Sea water on the removal of ash and total sulfur were found to be important.Öğe The effect of activating treatment on demineralization of a lignite sample by reverse flotation method(Taylor & Francis Inc, 2023) Temel, Halime AbakayIn this study, the influence of activating treatment on the demineralization of a lignite sample utilizing the reverse flotation was studied. A lignite sample containing 42.09% ash, 0.86% sulfur, 38.46% volatile matter and 19.45% fixed carbon was used in experiments. Quartz, clay mineral, feldspar (plagioclase) mineral and mica mineral were determined as dominant minerals. The activation of gangue minerals (particularly quartz) using lead, tin, iron, and aluminum salts were performed. The influences of different parameters were investigated. Reverse flotation results demonstrated that a clean coal having 35.81% ash and 61.81% combustible yield could be gained in the usage of tin salt.Öğe Investigation of the effectiveness of desliming and flotation in cleaning Malatya-Arguvan lignite(Taylor & Francis Inc, 2016) Temel, Halime Abakay; Majumder, Arun KumarThis study investigated the possibility of cleaning Malatya-Arguvan lignite using the flotation method. Because preliminary flotation studies suggested that desliming affects flotation performance, an attempt was made to quantify the effects of the major influencing parameters on the effectiveness of desliming and flotation. Because the optimum collector dosage was found to be very high, the effects of addition of sodium oleate and Aero 3477 were also investigated, to reduce the collector dosage. However, flotation results showed that the addition of sodium oleate and Aero 3477 does not alter the collector dosage significantly. Despite all the aforementioned efforts, only 20% of feed ash could be removed.Öğe Karlıova-Derinçay (Bingöl) Linyitinden Gang Minerallerinin Ters Flotasyon Yöntemi Ile Uzaklaştırılması(2018) Temel, Halime AbakayBu projede Karlıova-Derinçay (Bingöl) linyitinden gang minerallerinin ters flotasyon yöntemi ile uzaklastırılması arastırılmıstır. Deneysel çalısmalar havada kuru bazda; %8.39 nem, %38.56 kül, %35.23 uçucu madde, %17.82 sabit karbon ve %0.79 toplam kükürt ve 3022 kcal/kg üst ısı degerine sahip linyit numunesi üzerinde yapılmıstır. Proje iki asamada gerçeklestirilmistir. Birinci asamada katyonik kollektörler kullanılarak linyit numunesinin içerdigi gang minerallerinin (mika ve kuvars) flotasyonu çalısmaları yapılmıstır. Birinci asama çalısmalar sonucunda %36.59 küllü birlestirilmis konsantre (temiz kömür) %75.47 yanabilir verim oranı ile kazanılmıs olup birlestirilmis konsantredeki toplam kükürt oranı %0.64 ve toplam kükürt azalması %25.58 seklindedir. Ikinci asamada linyit numunesinin içerdigi gang minerallerinin alüminyum, kalay, demir ve kursun tuzları ile canlandırılması ve bir anyonik kollektör kullanılarak linyit numunesinin içerdigi gang minerallerinin (özellikle kuvars) flotasyonu çalısmaları yapılmıstır. Ikinci asama çalısmalar sonucunda %35.81 küllü birlestirilmis konsantre (temiz kömür) %61.81 yanabilir verimle kazanılmıs olup birlestirilmis konsantredeki toplam kükürt oranı %0.65 ve toplam kükürt azalması %24.42 seklindedir. X-ray analiz sonuçlarına göre her iki asamada Karlıova-Derinçay linyitinin içerdigi minerallerin hem birlestirilmis konsantre hemde birlestirilmis artıkta toplandıgını göstermistir. Major element analiz sonuçlarına göre birinci asamada linyit numunesinin CaO, Fe2O3, MgO, Al2O3, ve SO3 oranlarında bir azalma olmustur. Karlıova-Derinçay linyitine göre Al2O3 azalma oranı %9.23, CaO azalma oranı %34.62, Fe2O3 azalma oranı %13.16,, MgO azalma oranı %40, ve SO3 azalma oranı %43.33 seklindedir. Ikinci asamada linyit numunesinin CaO, MgO ve SO3 oranlarında bir azalma olmustur. Karlıova-Derinçay linyitine göre CaO azalma oranı %53.85, MgO azalma oranı %53.33 ve SO3 azalma oranı %73.33, seklindedir.Öğe Removal of Gangue Minerals Containing Major Elements from KarlA±ova-Derin‡ay (Bingol) Lignite Using a Reverse Flotation Method(Springer, 2015) Temel, Halime AbakayThe removal of gangue minerals containing major elements was investigated using a reverse flotation method. Experiments were conducted on lignite samples, with high-ash and low-sulphur contents taken from a lignite field in KarlA +/- ova-Derin double dagger ay (Bingol), Turkey. Predominant gangue minerals in the samples were found to be quartz, gypsum, feldspar minerals, mica minerals, and clays (smectite group). Preliminary flotation studies showed that gangue materials are more buoyant than the lignite sample. Some parameters that markedly influence the effectiveness of reverse flotation, such as grinding time, pH, collector type and volume, frother type and volume, and salt, were investigated. Quartz was found to cause a major problem in terms of reverse flotation. Flotation measurements showed that anionic collectors in an acidic medium result in the following element reduction order: sulphur trioxide > ferric oxide > magnesium oxide > calcium oxide > silicon dioxide > aluminium oxide.Öğe Selective Oil Agglomeration of Lignite(Amer Chemical Soc, 2009) Temel, Halime Abakay; Bozkurt, Volkan; Majumder, Arun KumarIn this study, desulfurization and deashing of Adiyaman-Golbasi lignite by the agglomeration method were studied. For this purpose, three groups of agglomeration experiments were made. The effects of solid concentration, bridging liquid type and dosage, pH, and screen size on the agglomeration after desliming were investigated in the first group of experiments. The effects of lake water and sea water (the Mediterranean Sea water, the Aegean Sea water, and the Black Sea water) on the agglomeration were investigated in the second group of experiments. The effects of different salts (NaCl, MgCl2, and FeCl3) on the agglomeration were investigated in the third group of experiments. Agglomeration results showed that the usage of sea waters and soda lake water in the agglomeration medium had a positive effect on the reduction of total sulfur content of agglomerates. In addition, the usage of NaCl, MgCl2, and FeCl3 in the agglomeration medium had a positive effect on the ash content reduction of the agglomerates.Öğe Şırnak asfaltitlerinden külün flotasyon yöntemi ile uzaklaştırılması(2003) Ayhan, Fatma Deniz; Temel, Halime Abakay; Kahraman, FikriBu çalışmada, flotasyon yöntemi ile Şırnak asfaltitlerinin külünün düşürülebilme olasılığı araştırılmıştır. Bu amaçla, öğütme süresinin, katı oranının, pH' nın, toplayıcı miktarının, bastırıcı miktarının ve köpürtücü miktarının flotasyon üzerindeki etkileri araştırılmıştır. En iyi koşullar, katı oranı % 5, pH 8, toplayıcı miktarı O g/t, bastırıcı miktarı 150 g/t ve köpürtücü miktarı 100 g/t olarak belirlenmiştir. Sonuç olarak, Şırnak asfaltitlerine flotasyon yönteminin uygulanması ile % 76,61 yanabilir verimle, % 32,95 kül içerikli temiz asfaltit elde edilmiştir.
