Decomposition kinetics of granulated glass batch

The effect of carboxyl methyl cellulose (CMC) solution on the decomposition kinetics of soda-lime glass batch was investigated by DTA, XRD analysis, and by calculation of transformation degree and the decomposing activation energy based on the theory of Ginstling-Brownstein equation and Arrhenius equation. DTA curves showed that the beginning temperatures of the silicate-formation reactions were shifted toward lower temperatures after adding CMC solution. The kinetic analysis showed that CMC solution improved the decomposition kinetics of granulated glass batch (pellets) by increasing the transformation degree and decreasing the activation energy. This was due to the finely dispersed, increased homogeneity and close contact of components of glass batch after granulating. The quartz low phase was identified by heat treatment of loose glass batch and pellets at the temperature range of 775-850 degrees C for different holding time. The fraction of silica reacted at various temperatures was obtained from quantitative analysis of XRD measurements. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.