The possibility of obtaining hydrocarbons from Polish shale deposits requires the development of backfilling materials – proppants, utilized in the extraction process. The aim of the research is to develop mixtures from domestic raw materials which are used for ceramic proppants generation by the method of spray drying. Prepared slurries were tested for their rheology. These studies define parameters which affect the stability at the time of homogenization and forming the green proppants, and also affecting the strength of the final product. The raw solids were characterized by: XRF chemical analysis and phase composition by XRD, SEM, with EDS analysis of micro-regions, and particle sizes by laser diffraction. The subject of the study were slurries prepared with kaolin, clay, bauxite and mixtures of these materials with wt. 10% addition of ash from the combustion of brown coal. Solid content by weight of slurry was 50 wt. % . One of the goals of the research was to assess the liquefaction of the ceramic material. Deflocculants are commercially available: Polikol 1500 Dispex A-40 and MB-10, which introduced an amount of 0.25% by weight relative to the solid phase. Studies of slurries include determination of the density, pH, dynamic viscosity by a coaxial cylinder-type rheometer, and the kinematic viscosity using Zahn Cup #4. The results showed that both, raw material composition and the nature of the deflocculants have a significant impact on the properties of ceramic slurries.