Solid heat storage material and preparation method thereof

Abstract

The invention particularly relates to a solid heat storage material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: mixing magnesite tailing fine powder, alumina tailing fine powder, quartz sand fine powder, used magnesia carbon brick fine powder and barium sulfate fine powder to obtain premixed powder; mixing the magnesite tailing particles with the particle size of 5-3mm, the alumina tailing particles with the particle size of 3-1mm, the quartz sand particles with the particle size of 3-1mm and the magnesite tailing particles with the particle size of less than or equal to 1mm to obtain a granular material; mixing the granules with the premixed powder to obtain a mixture; and adding a polyvinyl alcohol solution, uniformly mixing, carrying out compression molding, drying, and carrying out heat treatment at 1300-1500 DEG C for 5-8 hours to obtain the solid heat storage material. The prepared solid heat storage material is high in heat conductivity, large in heat storage capacity, high in thermal shock resistance and large in compression strength.