Kinetics of Ceramic Phase Crystallization in a Glass Derived from Wastes of Iron and Steel Industry
نویسندگان
1 Department of Materials Engineering, Isfahan University of Technology, Isfahan,8415683111, Iran
2 Department of Metallurgy and Materials Engineering, Hamedan University of Technology, Hamedan, 65155-579, Iran
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چکیده
Intensified environmental regulations have posed numerous challenges in the disposal of industrial wastes. The steel industry is one of the biggest production industries, with a considerable amount of daily wastes. Production of glass-ceramic from the steel industry waters is one of the proper solutions for this problem. In this study, the application utilization of different wastes (such as blast-furnace slag, converter slag, and dust) as the raw material for glass-ceramic production was evaluated. After mixing the precursors, the mixture was melted at 1450℃. The obtained melt was cooled down at 10°C/min cooling rate in metallic molds, and the glass was derived. Ceramic phases were grown by application of isothermal heat treatment periods up-to 6 h, at 750, 800, 850, and 900℃. The mean length of the ceramic phases was measured after each heat treatment period by scanning electron microscopy. It was shown that crystal growth followed a parabolic kinetic model. The activation energy of crystallization was also determined as 129 kJ/mol in the temperature range of 750-900°C.
