Study on the Effect of Deflocculant Variation in High-Alumina Low-Cement Castable

Abstract

The effect of three different, types of deflocculants and their amounts on high-alumina low-cement castables is studied. Castable formulations were done as per continuous particle size distribution of a Dinger-Funk model using a distribution coefficient of q = 0.21. Castable compositions were processed as per conventional processing techniques and variation in properties were evaluated regarding flowability of the mix and densification and strength development after drying and firing at 900 and 1500°C. Phase analysis of the matrix phase was also done for the 1500°C compositions to evaluate the phase formations at high temperature in the presence of cement. The alumina-based dispersant was found to have resulted in better properties in the castable.