In this study, flowsheet development and economic approach studies have been carried out for a sulphide ore containing gold and clay. For this purpose, previous beneficiation test results were used. First, clay separation was performed from the ore. In the following step, direct leaching, gravity separation and flotation methods were tested and compared to obtain a gold pre...
Spesifik enerji değeri mekanik kayaç kazısında kayaçların kesilebilirlik özelliklerini belirlemek için yaygın olarak kullanılmaktadır. Mekanik kayaç kazısı işlemlerinde mühendisler, spesifik enerji değerine bağlı olarak makine performansını tahmin etmek için kolay uygulanabilir, daha ekonomik ve basit örnek hazırlama yöntemlerinin kullanıldığı yöntemlere ihtiyaç duyarlar. Bu...
In this research, a series of characterization studies were carried out on Ayazini and Seydiler tuffs which are used as building stones around Afyonkarahisar. Petrographic-mineralogical (polarizing microscope, XRD), chemical analysis, porosity distribution and physico-mechanical properties of the mentioned rocks have been determined. Water is an important factor in the weathering...
In this study, selection of appropriate profile material and a profile section by using finite elements method during the design studies of the mine roadway support having a cross-section of 5,75 m2 was aimed. The support type was trapezoidal sectioned rigid steel support. In parallel with the aim of this study, load-profile section optimization studies were carried out by...
In this study, flowsheet development and economic approach studies have been carried out for a sulphide ore containing gold and clay. For this purpose, previous beneficiation test results were used. First, clay separation was performed from the ore. In the following step, direct leaching, gravity separation and flotation methods were tested and compared to obtain a gold pre...
Spesifik enerji değeri mekanik kayaç kazısında kayaçların kesilebilirlik özelliklerini belirlemek için yaygın olarak kullanılmaktadır. Mekanik kayaç kazısı işlemlerinde mühendisler, spesifik enerji değerine bağlı olarak makine performansını tahmin etmek için kolay uygulanabilir, daha ekonomik ve basit örnek hazırlama yöntemlerinin kullanıldığı yöntemlere ihtiyaç duyarlar. Bu...
Coal tends to adsorb oxygen and oxidize due to its structure. Spontaneous combustion mechanism of coal is very complicated, and still this mechanism is not completely understood. However, coaloxygen compound theory is widely accepted by researchers nowadays. According to this theory, spontaneous combustion consists of slow oxidation, accelerating oxidation and rapid oxidation...
In this study, a brief overview of the solvent extraction (SX) application for the separation and purification of nickel and cobalt in hydrometallurgical processing of laterite nickel ores is presented. This paper consists of two parts: firstly, the SX of nickel and cobalt from sulphate leach solutions is described; and secondly, the development of hydrometallurgical plants for...
In case the mine enterprises do not meet some legal requirements, they face a decision to stop the activity. The reasons that are effective in the decision to stop the activity vary according to the mine groups. In this study, the distribution according to the mining groups of mining enterprises operating in Eskisehir province, employee employment and the reasons of activity...
In this study, effect of activation conditions on the recovery of aluminum (Al) obtained by acid leaching from Pütürge (Malatya) pyrophyllite ore containing 23.6% Al2O3 was investigated. In this context, the initially non-activated ore and later activated ore samples using calcining and intensive milling were leached with HCl, separately. According to the experimental results, Al...
The possibility of using metaschist as an alternative to claystone which is used as the main input in cement production has been investigated. In the experimental work, the metaschists and claystone were used to produce cement separately from the raw materials from their fields, and their qualities were determined. As a result of the tests carried out, it was understood that...
Phosphate ore is one of the most critical raw materials for all living things (plant, animal, and human), according to the European Commission report which explains the importance of economical and supply risk of raw materials. Therefore, the evaluation of low-grade phosphate ore is of vital importance. In this study, the selective removal of carbonate minerals (calcite and...
Coal tends to adsorb oxygen and oxidize due to its structure. Spontaneous combustion mechanism of coal is very complicated, and still this mechanism is not completely understood. However, coaloxygen compound theory is widely accepted by researchers nowadays. According to this theory, spontaneous combustion consists of slow oxidation, accelerating oxidation and rapid oxidation...
In this study, a brief overview of the solvent extraction (SX) application for the separation and purification of nickel and cobalt in hydrometallurgical processing of laterite nickel ores is presented. This paper consists of two parts: firstly, the SX of nickel and cobalt from sulphate leach solutions is described; and secondly, the development of hydrometallurgical plants for...
In case the mine enterprises do not meet some legal requirements, they face a decision to stop the activity. The reasons that are effective in the decision to stop the activity vary according to the mine groups. In this study, the distribution according to the mining groups of mining enterprises operating in Eskisehir province, employee employment and the reasons of activity...
The possibility of using metaschist as an alternative to claystone which is used as the main input in cement production has been investigated. In the experimental work, the metaschists and claystone were used to produce cement separately from the raw materials from their fields, and their qualities were determined. As a result of the tests carried out, it was understood that...
Phosphate ore is one of the most critical raw materials for all living things (plant, animal, and human), according to the European Commission report which explains the importance of economical and supply risk of raw materials. Therefore, the evaluation of low-grade phosphate ore is of vital importance. In this study, the selective removal of carbonate minerals (calcite and...
liçidir. Cevherde bulunan bakır, çinko vb. minerallerinin de siyanür liçinde çözünmesi siyanür tüketimini artırmakta ve altın kazanımını olumsuz yönde etkilemektedir. Çözünen bu metaller, liç sonrası çözelti saflaştırma ve metal kazanımı süreçlerinde de teknik sorunlara neden olmaktadır. Siyanür liçi sonucunda, serbest siyanür ve metal-siyanür komplekslerini içeren atık çözelti...
The extraction of nickel from a mixed nickel-cobalt hydroxide precipitate (MHP) was conceived and experimentally explored. The effect of sulphuric acid concentration, leaching time, leaching temperature and stirring speed on nickel extraction was investigated. After 60 min leaching time, more than 90% of nickel and approximately 80% of cobalt were taken into the leach solution...
Cevher hazırlama tesislerinde yaygın olarak kullanılan eleme işlemi, kırma devrelerinin etkin çalışmasında çok önemli bir yere sahiptir. Eleklerin seçiminde, performanslarının ve ürün boyut dağılımlarının tahmininde yaygın olarak konvansiyonel ampirik ya da yarı-ampirik modeller kullanılmaktadır. Bu modeller, başlıca parametrelerin etkilerini dikkate almakla beraber, bazı tasarım...
Eleme işlemi cevher hazırlama tesislerinde en yaygın kullanılan birim işlemlerden biridir. Taneli malzemelerin hareketinin modellenmesi ve simülasyonu amacıyla Ayrık Elemanlar Yöntemi’nin (AEY) cevher hazırlama alanında kullanımı özellikle 1990’lı yıllardan itibaren yaygınlaşmaya başlamıştır. Pek çok birim işlemin (öğütme, stoklama, malzeme taşıma, manyetik ayırma vb...
Türk çimento sektörü ekonomik, sosyal ve çevresel koşulları gözeterek ve teknolojik imkânları kullanarak, sürdürülebilirliğe katkı sağlamayı hedeflemektedir. Kaynakların her geçen gün daha da azalmaya başladığı ve pahalılaştığı bir ortamda çevresel kaynakları korumadan, sürdürülebilir bir ekonomik kalkınma yaratılması çok zordur. Enerji ve hammadde kullanımı yoğun olan çimento...
Monitored cycle times and cycle time segments of three 35 m3 electric rope shovels are given and discussed from a bituminous coal mine in Kuzbass Coal Basin in Siberia, based on daily monitoring reports of a four days period in May 2015. Furthermore, the results of a 45 m3 shovel operating in Northern Europe; and the results of 12 m3 and 15 m3 electric rope shovels surveyed by...
Kömür, enerji kaynağı olarak, sanayilerde önemli hamlelerin atılmasına katkı sağlamış fakat kontrolsüz ve iyileştirilmeden kullanıldığı için de önemli çevresel olumsuzlukların yaşanmasına neden olmuştur. Kömür üretimi ve tüketimi sırasında her aşamada olumsuz çevresel etkiler oluşmaktadır. Fakat dünyanın birçok bölgesinde bulunması, güvenilir olması ve yenilenebilir enerji...
Bu çalışma, Magnesit Anonim Şirketi’ne (MAŞ) ait Tutluca Manyezit Açık İşletmesi çevresinde oluşturulan harmanların doğaya yeniden kazandırma kapsamında yapılan düzenlemeleri ve ağaçlandırma çalışmalarını içermektedir. Bu ağaçlandırma ve düzenleme çalışmaları 1994 yılından beri sistematik olarak yapılmaktadır. Bu bölgede, bugüne kadar, planlı 43 farklı alan düzenlenerek...