Wall Ceramics Products Based on Opoka and Coal Slurry

AbstractThe article shows high prospects of high-performance wall ceramics products with average density less than 700-800kg / m3 and thermal conductivity less than 0.15–0.20W/(m · °C) manufacturing with minimum costs. There is a brief description of siliceous opal-cristobalite rocks - opoka and by-products of coal processing - dehydrated coal slurries being valuable man-caused raw material. The results of studies on the production of ceramic stones of high efficiency compression molding based on clay and clay-carbonate opoka with the addition of coal slurry are shown. The main technological factors and regularities affecting the properties of products are defined. The results of research on the impact of the amount of coal slurry on the strength, density and water absorption of products taking into account the firing temperature are given. The phase-logical and mineralogical transformations occurring during firing were examined. The recommended process scheme for the production of highly efficient ceramic stones is given. The feasibility study for the products manufacturing of this type on the basis of opoka and coal slurry is give