Olivin esaslı refrakter tuğlanın karakterizasyonu

Bu çalışmada öğütülmüş olivin kumu ve kil kullanılarak yarı yaş presleme yöntemiyle refrakter tuğla üretilmiştir. Üretilen tuğlalar farklı sıcaklıklarda sinterlenmiştir ve sinterleme için en uygun sıcaklığın 1350 0C olduğu tespit edilmiştir. Mekanik dayanımları da test edilen tuğlaların su emme değerlerine bakılmıştır. Farklı mekanik ve fiziksel özelliklere sahip tuğlalardan en iyi özellikleri sergileyen malzeme üzerinde içyapı incelemeleri yapılmıştır. Ege Bölgesi’ne ait hammadde kullanılarak üretilen ve yüksek sıcaklıklarda da kullanılabilecek bir malzeme olarak çeşitli alanlarda uygulanabilmesi için tuğlada yapılacak modifikasyonlara yol göstermesi amacıyla böyle bir temel çalışma yapılmıştır. Elde edilen malzemeye en yakın ticari ürün forsterit tuğlalardır. Forsterit tuğlanın 2,55-2,70 g/cm3 aralığındaki bulk yoğunluk, %18-24 aralığındaki açık porozite ve 50 MPa mekanik dayanım değerlerine benzer özellikler gösteren malzeme elde edilmiştir.

Anahtar Kelimeler:

Dayanım, İçyapı, Kil, Olivin, Refrakter tuğla

Characterization of olivine based refractory brick

In this study, refractory bricks were produced with semi dry pressing method using grinded olivine sand and clay. The produced bricks were sintered at different temperatures and the optimum sintering temperature was determined as 1350 0C. The water absorption values of the bricks were also tested. Microstructure examinations were carried out on the materials which exhibited the best mechanical and physical properties. Such a basic study has been carried out in order to guide the modifications that to be made in brick composition for applying in various areas as a material which can be used at high temperatures produced using raw materials that belong to Aegean Region. Material, which has lower density value than forsterite bricks and provides their mechanical strength, has been produced. Forsterite bricks are the closest commercial product to obtained olivine brick. A material showing similar properties to forsterite brick with bulk density between 2.55-2.70 g/cm3, apparent porosity between 18-24% and mechanical strength of 50 MPa was obtained.

Keywords:

Strength, Microstructure, Clay, Olivine, Refractory brick,

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