BAĞLAYICI OLARAK PİROLİTİK SIVI KULLANILAN MgO-C REFRAKTER TUĞLALARIN MEKANİK ÖZELLİKLERİNİN İNCELENMESİ

In this study, pyrolytic liquid obtained in 500 ° C temperature, 15 ° C / min heating rate and 0,5 lt / min nitrogen flow rate pyrolysis parameters and then 2 times extraction with 10% H2SO4 solution to decrease sulfur content was used as a binder in MgO-C refractory brick. % Open porosity, density, cold compressive strength (CCS) and three point bending strength and Elastic Modulus values of the produced refractory materials were determined, and were compared with the properties of MgO-C refractory bricks produced by incorporation of phenolic resin in the refractory sector. In addition, microstructure images by scanning electron microscopy (SEM) were investigated and were correlated with the mechanical properties of those refractories. Elemental analysis by X-ray Fluorescence (XRF) spectroscopy and phase analysis by X-Ray Diffraction (XRD) were performed.Bu çalışmada lastik atığının 500°C sıcaklık, 15 °C/dk ısıtma hızı ve 0,5 lt/dk azot akış hızı piroliz parametrelerinde pirolizi sonucu elde edilen ve daha sonrasında 2 defa %10' luk H2SO4 çözeltisi ile ekstraksiyon işlemi uygulanarak kükürt miktarı düşürülen pirolitik sıvı, MgO-C refrakter tuğlada bağlayıcı olarak kullanılmıştır. Üretilen refrakter malzemelerin % açık gözenek, yoğunluk ve Soğuk Basma Mukavemet (SBM) değerleri ile üç noktalı eğme Mukavemet değerleri ve Elastik Modülü belirlenmiş, refrakter sektöründe üretilmekte olan ve fenolik reçine ile üretilen MgO-C refrakter tuğlaların özellikleri ile kıyaslanmıştır. Ayrıca, Taramalı Elektron Mikroskobu (SEM) ile mikroyapı görüntüleri incelenerek mekanik özellikleri ile ilişkilendirilmiştir. Elementel Analizleri X-ışınları Floresans (XRF) spektroskopisi ile ve faz analizleri de X-Işını Kırınım yöntemi (XRD) ile gerçekleştirilmiştir

Effect of Sulfur Content on thePhysicalandMechanicalProperties of MgO-C RefractoryBricksProducedby Using Carbon Black ObtainedbyPyrolysis of RubberWastes

Her geçen gün miktarı artan lastik atıklarının sebep olduğu problemleri önlemek ve refrakter sektöründe geri kazanımını sağlamak amacı ile yapılan bu çalışmada, piroliz parametrelerine bağlı olarak pirolitik karbon siyahı içerisindeki kükürt miktarının değişimi ve ayrıca, pirolitik katı ürün olan karbon siyahı kullanılarak üretilen MgO-C refrakter malzemelerinin yoğunluk, % açık gözenek ve soğuk basma mukavemeti (SBM) değerlerinin kükürt miktarı ile değişimi incelenmiştir. Kükürt miktarının azalması ile yoğunluk ve SBM değerlerinin arttığı, % açık gözenek değerlerinin ise azaldığı gözlenmiştir.In this done study in order to prevent problems caused by increasing tire wastes every day and to provide recycling in the refractory sector, change in sulfur content in pyrolytic carbon black depending on pyrolysis parameters and also the density, % open porosity and cold compressive strength (CCS) values of the MgO-C refractory materials produced using pyrolytic solid carbon black product as a function of sulfur content were investigated. As the amount of sulfur decreased, the density and CCS values increased and the open pore % values decreased

Recovery of waste tyres by pyrolysis in a fixed bed reactor for liquid fuel production: effects of pyrolysis conditions on oil yield

One of the major environmental problems around the world is disposal of waste tyres without any purpose. Disposal of waste tyres is an increasing environmental problem. Also because of high content of valuable chemicals and other compounds hidden in the waste tyres, disposal of them is an economical problem as well. Pyrolysis is a thermochemical process that can be used for recovery of the valuable chemicals in the waste tyre. Pyrolysis is a recycling process in which, liquid product can be used as a fuel directly or can be mixed with petroleum refined oils. Derived gaseous product can also be used as a fuel and solid product can be considered as a fuel and low grade carbon black. In this work, granulated waste tyres have been pyrolyzed in a fixed bed reactor under different conditions of temperature, heating rate and inert purging gas (N2) flow rate. The purpose of the study was to optimize the pyrolysis parameters in order to produce the highest amount of oil. 400°C, 450°C and 500°C were selected and the maximum yield of liquid product was observed at 450°C. Among the heating rates of 10°C/min, 15°C/ min and 20°C/min; 10°C/min was the parameter that gave maximum oil yield. And while working at 450°C and 10°C/min; N2(g) flow rate was examined by using 0.5 L/min, 1 L/min and 1.5 L/min. The maximum oil yield was observed at 1 L N2(g) /min. According to the results of the study; at 450°C, with a heating rate of 10°C/min and 1 L N2(g)/min gave the maximum yield of oil, which is 53.33 wt.%. The pyrolytic oil from waste tyre had the Gross Calorific Value of 42.6 MJ/kg which is very close to that of commercial diesel no 2 (around 42-46 MJ/kg). The pyrolytic oil produced is a promising fuel and can be used as a source of energy after some future work for make it suitable for use in vehicles or in other areas like factories or houses etc

Recovery of waste tyres by pyrolysis in a fixed bed reactor for liquid fuel production: effects of pyrolysis conditions on oil yield

One of the major environmental problems around the world is disposal of waste tyres without any purpose. Disposal of waste tyres is an increasing environmental problem. Also because of high content of valuable chemicals and other compounds hidden in the waste tyres, disposal of them is an economical problem as well. Pyrolysis is a thermochemical process that can be used for recovery of the valuable chemicals in the waste tyre. Pyrolysis is a recycling process in which, liquid product can be used as a fuel directly or can be mixed with petroleum refined oils. Derived gaseous product can also be used as a fuel and solid product can be considered as a fuel and low grade carbon black. In this work, granulated waste tyres have been pyrolyzed in a fixed bed reactor under different conditions of temperature, heating rate and inert purging gas (N2) flow rate. The purpose of the study was to optimize the pyrolysis parameters in order to produce the highest amount of oil. 400C, 450C and 500C were selected and the maximum yield of liquid product was observed at 450C. Among the heating rates of 10C/min, 15C/ min and 20C/min; 10C/min was the parameter that gave maximum oil yield. And while working at 450C and 10C/min; N2(g) flow rate was examined by using 0.5 L/min, 1 L/min and 1.5 L/min. The maximum oil yield was observed at 1 L N2(g) /min. According to the results of the study; at 450C, with a heating rate of 10C/min and 1 L N2(g)/min gave the maximum yield of oil, which is 53.33 wt.%. The pyrolytic oil from waste tyre had the Gross Calorific Value of 42.6 MJ/kg which is very close to that of commercial diesel no 2 (around 42-46 MJ/kg). The pyrolytic oil produced is a promising fuel and can be used as a source of energy after some future work for make it suitable for use in vehicles or in other areas like factories or houses etc

Investigation of Mechanical Properties of MgO-C Refractories Produced by Pyrolytic Carbon Black with Removal of Sulfur and Ash

Lastik atıklarının refrakter sektöründe geri kazanımını sağlamak amacı ile yapılan bu çalışmada, piroliz reaktöründe 500 C sıcaklık, 15 C/dk ısıtma hızı ve 0,5L/dk N2 akış hızı parametrelerinde elde edilen katı ürünün kükürt ve kül miktarları azaltılmış ve daha sonrasında MgO-C refrakter malzemelerinin üretiminde karbon kaynağı olarak kullanılmıştır. Üretilen refrakterlerin yoğunluk, % açık gözenek ve soğuk basma mukavemeti (SBM) değerlerinin kükürt ve kül miktarı ile değişimi incelenmiştir. Piroliz sonrası atık lastiğin ve kükürt ve kül giderimi sonrası elde edilen pirolitik karbon siyahı malzemelerinin X-Işını Difraktometresi (XRD) ile faz analizleri, taramalı elektron mikroskobu (SEM) ile mikroyapı analizleri ve Enerji Dağılımlı X-Işını Analizi (EDX) ile kimyasal analizleri gerçekleşmiştir. Kükürt ve kül miktarları azaldıkça, bu ürünlerin kullanıldığı refrakter malzemelerin % açık gözenek miktarının ve yoğunluk değerlerinin yaklaşık aynı olmasına rağmen soğuk basma mukavemeti değerlerinin arttığı görülmüştürIn this study, which aims recycling/regaining tire waste in the refractory sector, the amounts of sulfur and ash of the solid products obtained from the pyrolysis reactor at 500 C, 15 C/min heating rate and 0.5 L/min N2 flow rate were reduced and then used in MgO-C refractory materials as a carbon source. The exchange of density, % open porosity and cold compressive strength (CCS) values with the amount of sulfur and ash of the produced refractories were investigated. Phase analysis by X-ray diffractometry (XRD), microstructure analysis by scanning electron microscopy (SEM), and chemical analysis by energy diffraction X-Ray analysis (EDX) of pyrolytic carbon black materials obtained after waste tire pyrolysis and sulfur and ash removal were obtained.As the amounts of sulfur and ash decreased, the cold compressive strength values increased, although the open porosity and density values of the refractory materials used for these products were approximately the sam

Effect of Sulfur Content on thePhysicalandMechanicalProperties ofMgO-C RefractoryBricksProducedby Using Carbon BlackObtainedbyPyrolysis of RubberWastes

Her geçen gün miktarı artan lastik atıklarının sebep olduğu problemleri önlemek ve refrakter sektöründe geri kazanımını sağlamak amacı ile yapılan bu çalışmada, piroliz parametrelerine bağlı olarak pirolitik karbon siyahı içerisindeki kükürt miktarının değişimi ve ayrıca, pirolitik katı ürün olan karbon siyahı kullanılarak üretilen MgO-C refrakter malzemelerinin yoğunluk, % açık gözenek ve soğuk basma mukavemeti (SBM) değerlerinin kükürt miktarı ile değişimi incelenmiştir. Kükürt miktarının azalması ile yoğunluk ve SBM değerlerinin arttığı, % açık gözenek değerlerinin ise azaldığı gözlenmiştir.In this done study in order to prevent problems caused by increasing tire wastes every day and to provide recycling in the refractory sector, change in sulfur content in pyrolytic carbon black depending on pyrolysis parameters and also the density, % open porosity and cold compressive strength (CCS) values of the MgO-C refractory materials produced using pyrolytic solid carbon black product as a function of sulfur content were investigated.As the amount of sulfur decreased, the density and CCS values increased and the open pore % values decreased