Mustafa Özer

Mustafa Özer
Istanbul Technical University · Department of Mineral Processing Engineering

Doctor of Philosophy

About

69
Publications
16,362
Reads
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250
Citations
Additional affiliations
January 2015 - January 2016
University of Pittsburgh
Position
  • Researcher
October 1999 - December 2015
Istanbul Technical University
Position
  • Researcher

Publications

Publications (69)
Article
This paper reports physical and physicochemical routes for the recycling of gold, silver, and copper from waste printed circuit boards (WPCBs). The results of optical micrographs indicated that the metals and waste matrix are substantially separated from the slot after the comminution process. The effects of various operational factors, including g...
Research
Removal of impurities from quarzite to obtain for glass quality sand.
Presentation
Full-text available
ABOUT MINERAL PROCESSING ENGINEERİNG DEPARTMENT OF ISTANBUL TECHNICAL UNIVERSITY
Article
This study focuses on the recovery of valuable metals, such as gold, silver, and copper, from the printed circuit boards of waste computers, using physical separation followed by leaching methods. Characterization studies revealed that resins and glass fibers were attached as grain together with base and precious metals. A hammer mill was employed...
Conference Paper
Full-text available
Lime (CaO) is a main ingredient of technologies employed in a wide variety of industries such as construction, agriculture, food processing, disinfection, water treatment, SO2 post combustion capture, steel-making, plastics and glass, and sugar refining. Limestone, on the other hand, is the main source in the production of Lime, which is used in va...
Article
The recovery of precious metals can be successfully managed from waste which is considered to be secondary sources of raw material. Waste derived from jewelry activity falls in this category, and represents an essential component of precious metals. The most important metals in the jewelry sector are gold (Au) and silver (Ag). As a result of workma...
Article
Full-text available
The ancient flotation tailings from Lefke, Cyprus, have a potential for non-ferrous metals such as cobalt and copper from more than 9.5 million tons of reserves containing 0.38% Cu, 0.032% Co, and 22.6% Fe. Recovery of cobalt and copper from these tailings can provide great benefits from economic and environmental perspectives. While the ancient ta...
Article
High-value-added micronized quartz production can be possible by removing the impurities of -100 micron by-product composition which is obtained from glass sand enrichment plants. In this study, it was aimed to produce high quality silica concentrate from such a product. For this purpose, low alumina content pre-concentrate was obtained with 0.12%...
Article
Full-text available
The 79.9% of lignites in Turkey possesses a calorific value lower than 2500 kcal/kg. In order to reduce the energy dependence of the country, it would be right to evaluate these lignite reserves of 11.8 billion tons by effective coal preparation methods and use them with clean coal combustion systems together with developing technology. A typical c...
Article
Recently, the consumption of electrical and electronic equipment (EEE) has increased with the advanced technology. A wide range of components made of metals, plastics and other substances are contained in EEE. Electronic waste (e-waste) is easily demounted and separated by manually methods; however, printed circuit board (PCB) which is one the most...
Article
Full-text available
In recent years, the influence of different crushing systems (compression, impact, attrition) has been receiving more attention due to their significant role on particle liberation and shape of particles. The objective of this study was to investigate the effects of different crushing systems on both liberation degree and shape factors of chromite...
Conference Paper
Full-text available
In this study, the possibilities of obtaining Au and Ag pre-concentrate Murgul ores using gravity methods prior to flotation were investigated. In order to produce Au-Ag pre-concentrate Çakmakkaya ore was ground below 0.5 mm and a heavy product was obtained using shaking table. The second stage gravity tests were done using Mozley table concentrato...
Conference Paper
Full-text available
In this study, the beneficiation of a chromite ore taken from Denizli Region was investigated. To achieve a concentrate appropriate for the refractory industry, high Cr2O3 grade and low Si content were tried to be obtained. For this purpose, the sample containing 25.55% Cr2O3 and 16.41% SiO2 was subjected to shaking table tests. The tests were cond...
Article
In this study, the sulfation roasting characteristics of copper-bearing ore and its flotation products as chalcopyrite concentrate and tailings were investigated in detail. For this aim, the roasting-leaching experiments and thermal analyses were conducted on the samples. As a result of the leaching of sulfated products obtained from the roasting e...
Chapter
This chapter presents a comprehensive review of the effects of the physical and chemical properties of coal on the gasification process. These include coal reactivity (rank, macerals, porosity, surface area, mineral matter contents, etc.); ash and slag properties (mineral matter transformation, ash fusibility, slag viscosity, ash agglomeration, fou...
Article
Full-text available
This paper reports the results of flotation tests conducted with a copper-lead-zinc sulphide ore. The major sulphide minerals in the ore are chalcopyrite, galena, sphalerite, marmatite and pyrite with corresponding metal amounts of 6.80% Pb, 1.05% Cu and 1.50% Zn, respectively. The ore sample was ground to below 200 µm and then collective and selec...
Article
Full-text available
This paper presents an extensive review of the coal agglomeration process, including oil agglomeration theory, characterization methods of coal hydrophobicity, and the main factors affecting the agglomeration process performance in terms of combustibles recovery and ash rejection. Coal rank and oxidation state, coal petrography and composition, coa...
Conference Paper
This paper presents an extensive review of the oil agglomeration process, including agglomeration theory, characterization methods of coal hydrophobicity, and factors affecting clean coal’s combustibles recovery, ash and mineral matters, including pyretic sulfur, rejection efficiency, and economics. It also provides a chorological summary of the ev...
Conference Paper
Full-text available
In this study, beneficiation of the spiral chromite tailings taken from South Africa, which contains 22.5% Cr2O3, were investigated by using combination of gravity units. Shaking table tests were carried out at size fractions such as -0.841+0.355 mm; - 0.355+0.212 mm; -0.212+0.074 mm and Mozley table was used for -0.074 mm, however, appropriate res...
Conference Paper
Full-text available
Taş Ocağı By-pass Malzemesinden Değerlendirilebilir Agrega Kazanımının İncelenmesi başlıklı bildiri, 7.Ulusal Kırmataş Sempozyumu 2015’de yayınlanmış olup, yazar 1nci isimdir. Bildiride; 50 mm boyutu altında ayrılmış bir by-pass malzemesinden, aktarma tamburunda yıkama ve eleme ile satılabilir agrega ürünlerinin kazanılması parametreleri incelenmiş...
Conference Paper
This scientific study aims to investigate the extraction of gold and silver using agitation leaching method from tailings of Bolkar gold plant. The tailings contain 1.01 ppm Au and 41.8 ppm Ag. The effect of leaching duration, mechanical activation, pre-aeration and water quality were investigated. During the leaching tests, 40% solid ratio and 0.5...
Article
Full-text available
Global consumption of commercial energy totaled 18 billion tons of coal equivalents (Gtce) in 2010. Coal, with a 28% share, ranked second after oil as one of the major sources of primary energy. World coal production reached 7.2 billion tons in 2010; 6.2 billion tons of hard coal and 1.0 billion tons of lignite. In turn, the hard coal comprised 5.3...
Conference Paper
Full-text available
The basic requirement of glass industry for the silica sand is at least 99% SiO2 content. On the other hand, coloring impurities such as Fe and Ti, must be removed. Flotation is the most widely used method for the purification of silica sands from impurities. In this study experimental studies were carried out to reduce Fe content of Mersin (Turkey...
Conference Paper
Nowadays, energy demand becomes an inevitable requirement depending on social, technological and economical evolutions. Since industrial revolution, energy production became a significant factor for determining the development of a country. For this reason, the energy production has always been an important issue in history of the world. As well as...
Conference Paper
Full-text available
Antimony is a strategic metal which is used in many industrial areas. The content of the antimony ore is the most important point for determining the area of usage. Since, high-grade antimony ores are depleted, there are many research studies involving the enrichment of low-grade antimony ores. For this ores, mainly flotation is applied for benefic...
Article
Three different Turkish Lignites (İstanbul-Yeniköy, Manisa-Soma, and Muğla-Milas) were prepared in accordance with coal-water mixtures technology to determine the combustion parameters of a laboratory-scale fluidized bed combustor. In this context, the effects of parameters such as Ca/S, mean bed temperature, preheat, air emission, and feed rate we...
Conference Paper
This study investigates the effects of the characteristic temperatures of the burning profile on the reactivity of 15 lignite samples originating from different areas of Turkey. Nonisothermal thermogravimetry has been used to determine the combustion reactivity of the samples. The combustion activation energies were calculated by the Coats Redferm...
Conference Paper
Full-text available
Lignite washing plants, in nature, process huge amount of run-off mine coal annually and produce signifi cant amount of tailings. Due to the certain characteristic of coal washing processes, in general, minus 0.5 mm size fraction containing valuable fi ner coals (mainly called slimes) can be discharged as tailings without effi cient further treatme...
Conference Paper
Full-text available
Coal washery have produced huge amount of fine tailings called slime. These tailings have also covered huge areas and this makes environmental pollution on site beside contains recoverable fine coals by using conventional and newly developed beneficiation units. In order to recover of fine coals from tailings as well as to rehabilitate of old taili...
Conference Paper
Full-text available
In this paper, leachability of nickel and iron were investigated by pugging + leaching of both metals. Metal content of run off-mine ore used in this study are 0,934% Ni and 49,50% Fe. Acid pugging + leaching tests at elevated temperature were conducted. According to the optimum test results, nickel and iron extraction recoveries were 92,7 % and 80...
Article
Full-text available
The aim of this study is to investigate the behavior and velocity ratio of tincal particles in different fluid media containing clay minerals, so that the diversion of tincal particles into slime product or not can be estimated. Tests were carried out using a settling unit and parameters such as clay content of the pulp and dissolved tincal concent...
Conference Paper
Full-text available
Turkey has numerous coal washing plants. Fine coal wastes have been produced in these plants. Soma Washery is one of them. In this study, beneficiation of fine waste was aimed in order to provide economical benefit and reduce direct impacts on the environmental pollution by using gravity separation methods. After the concentration tests, the compar...
Conference Paper
In this study, the grinding conditions in the preparation of coal-water slurries were improved by the use of the dispersing agents PSS and NSF and viscosity values much less than 1000 mPa were obtained. Under the optimum concentrations (0.3% and 0.7% PSS to mass of coal) attainable in the presence of PSS and NSF, it was observed that the conservati...
Conference Paper
Full-text available
In Sivas-Divriǧi Iron Ore Concentrator 600,000 tons of tailings is discarded annually. There are already one million tons of tailings deposited in the ponds from the previous production activities. The presence of Co, Ni and Cu in the tailings makes the beneficiation of those tailings attractive. In the experimental work, sulphide concentrates were...
Conference Paper
In the scope of this study, the combustion experiments were performed with CWSs prepared from Zonguldak bituminous coal, Soma semi bituminous coal and Istanbul - YenikÖy lignite coals in pilot type down fired coal combustor. The particle size and combustion ratio were kept as constant in the experiments. The coalification degree which play an impor...
Conference Paper
Today 90% of electricity in the world is produced from fossil fuels such as coal, oil and naturel gas. Oil equivalent of fossil in the world is calculated to be 68% coal, 18% oil and 14% natural gas. According to these figures the lifetime of oil, natural gas and coal is 40, 60 and 220 years respectively. Coal water slurries (CWS) and coal oil mixt...
Conference Paper
Full-text available
In this study, the recovery of metallic values such as copper and cobalt from the ancient copper slag is investigated. The sample containing 17.08% Cu and 0.55% Co were subject to experimental studies. Sieve analysis after crushing by roll crusher showed that the copper content of +2 mm size fraction 3.9% in weight is 90.70%. In order to recover co...
Article
The effect of PSS (Sodium Polystyrene Sulphonate) and NSF (Naphthalene Sulphonate Formaldehyde Condensate) chemicals used to control the pulp rheology on the grindability of coals was studied. Zonguldak region bituminous coal and Istanbul region brown coal samples that high and low rank were used. Wet grinding tests with two coal samples were perfo...
Article
Full-text available
In this study, the effects of particle size, moisture, briquetting pressure, and preheating temperature were investigated on briquetting without binder of Sırnak Asphaltite, having a particle size of—20 mm, 46.22% ash, 5.83% total sulphur content, and 4900 kcal/kg calorific value. At the end of the briquetting experiments; mechanical strength value...
Article
Full-text available
The effects of PSS (sodium polystyrene sulphonate) and NSF (naphtalene sulfonate formaldehyde condensate) chemicals used to control the pulp rheology, on the grindability of coals were studied. Zonguldak region bituminous coal and İstanbul region brown coal samples, which have different structures, were used in the test work. Wet grinding tests wit...
Article
In this study, combustion experiments were carried out by using different rank coals from Turkey. The experiments, performed at a constant coal particle size and combustion ratio suggested that the coalification degree, which is very important parameter in preparation of coal-water mixtures, is not effectual on the combustion of coal-water slurries...
Article
This study covers the studies of CWS preparation and combustion properties on the Turkish lignite with low coal calorific (3675 Kcal/kg) value and high ash forming minerals (41 %) that may be regarded as coal wastes. The particle size, coal concentration, air/fuel ratio and atomizing air pressure effects on both slurry preparation and combustion pr...
Conference Paper
Utilization of Turkish bituminous coals for the application of CWS (Coal-Water Slurry) technology is covered by this study. The factors related with slurry preparation and combustion, such as viscosity, stability, atomization and combustion properties of slurry were investigated on Turkish coal sample taken from Zonguldak-Armutçuk. The results of v...
Article
Full-text available
Sedimentation of concentrated clays and kaolin has always been difficult and taken long times due to their nature and having small particle sizes. Sedimentation behaviours of clay mixtures and kaolin, taken from Kalemaden A.Ş., prior to being used in the ceramic production, were investigated. The effects of pulp density, flocculant addition and ult...
Article
It is well known that ultrasonic field is generally used in the cleaning of metal surfaces. Recently, there have been some attempts for the use of ultrasonic treatment in the mineral industry, especially in flotation and separation of fine particles from gases or liquids. Ultrasonic energy is used as a first time in the sedimentation of clay in thi...
Article
Full-text available
ÖZ Bu çal›flmada, kömürleflme derecesi birbirinden farkl› olan üç farkl› Türk kömüründen haz›rlanm›fl kar›fl›mlar üze- rinde yakma deneyleri gerçeklefltirilmifltir. Kömür tane boyutu ve yanma oran› sabit tutularak gerçeklefltirilen yak- ma deneyleri sonucunda, kar›fl›m haz›rlama aflamas›nda etkili olan kömürleflme derecesinin, kar›fl›mlar›n yak›lma...

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