Lina İSRAEL İSRAİL, Kemal KÖSEOĞLU, Hakan CENGİZLER

Production of Wall Tiles Containing Ulexite Waste at Different Sintering Temperatures

Experimental compositions were prepared by the additions of ulexite concentrator waste to a standard wall tile body sintered at different temperatures. Tests of linear firing shrinkage, water absorption, and fired bending strength (eğilme mukavemeti) were done. XRD analyses were conducted to determine major crystalline phases in wall tile bodies. SEM-EDX analyses were performed to study the microstructural evolution of the standard and experimental wall tile bodies. Colorimetric analyses were also made. The wall tile body containing 5 weight percent ulexite concentrator waste fired at 925 oC for 6 minutes was determined to be the optimal composition with 0.60 % of linear firing shrinkage, 17.66 % of water absorption, and 208.60 of kg/cm2 fired bending strength (eğilme mukavemeti) . Sintering temperature was reduced from 1182 oC of industrial practice down to 925 oC. Utilization of ulexite concentrator waste in tile bodies will help reduce energy costs in favour of the environment and economy.

Anahtar Kelimeler:

Wall Tile, Sintering, Ulexite Waste

Üleksit Atığı İçeren Duvar Karolarının Farklı Sinterleşme Sıcaklıklarında Üretimi

Üleksit konsantratör atığının standard duvar karosu bünyesine katılması ve değişik sıcaklıklarda sinterleşmesiyle deneysel numuneler hazırlanmıştır. Doğrusal pişme küçülmesi, su absorpsiyonu ve pişme bükülme testleri yapılmıştır. X-ışınları kırınım analizleri duvar karolarının kristal fazlarını tayin etmekte; SEM-EDX analizleri standard ve deneysel duvar karolarının mikro yapılarındaki değişimlerin anlaşılmasında kullanılmıştır. Renk analizleri de gerçekleştirilmiştir. 925°C de 6 dakika pişirilen %5 üleksit konsantratör atığı %0.6 doğrusal pişme küçülmesi, %17.66 su emme ve 208.6 kg/cm2 pişme bükülmesi değerleriyle optimum konsantratör atık derişimi olarak belirlenmiştir. Endüstriyel üretimde 1182°C olan sinterleşme sıcaklığı 925°C’ ye düşürülmüştür. Üleksit konsantratör atığının duvar karolarında kullanımı enerji maliyetlerini düşürmeye yardım ederek ekonomi ve çevreye yarar sağlayacaktır.

Keywords:

Duvar Karosu, Sinterleşme, Üleksit Atığı,

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