Development of Ceramic Refractory Filters from Alternative Mineral Source: Rheological Characterization

This article reports the results of a preliminary research work related to the rheological study of aqueous suspensions prepared from an industrial solid waste (ceramic shell) from the process of lost-wax casting. The results showed that the residue analyzed has a strong refractory character since it contains mostly mullite, zirconium silicate and quartz. The ceramic suspensions obtained, containing 70% (~ 23% vol.) residue, 5-7% of kaolin and 1.0-1.5% dispersant, showed a rheological behavior suitable for impregnation of polymeric foams for the production of filters for metal casting by the replication method.