An analysis of existing ceramic materials for high-temperature thermal insulation is presented. The possibility of obtaining a composite based on zeolite-containing raw materials from the Sakhaptinsky deposit with additives for thermal insulation of industrial aggregates is shown. The results of the effect of additives (clay, microsilica, burnable additives and foam-forming emulsion) on the physical-mechanical and firing properties of the resulting products are presented. The main characteristics of the resulting porous ceramics were studied and the optimal limits for the use of the additives used were determined in accordance with the requirements of GOST 2694-78 for the analogical foam-diatomite brick. The effect of clay content in composites on the density, strength and additional linear shrinkage of samples was determined.An optimal composition has been obtained containing microsilica and burnable additives (sawdust) in the manufacture of porous ceramics used for high-temperature thermal insulation with the lowest density and appropriating the requirements of GOST for strength and additional linear shrinkage.

Keywords: zeolite, clay,microsilica, foam-forming emulsion, burnable additives, chemical composition, firing properties, physico-mechanical properties, porous ceramics, waste products, high temperature insulation