Increase in the strength of refractory granules using deposition of silicate coatings

It is shown that it is possible in principle to increase the strength of refractory granules by a factor of 1.5 - 2 by applying coatings on them based on silicon-containing compounds at elevated temperatures. It has been established that an increase in strength is achieved to a greater extent when a coating is formed with the structure of fine-crystalline sodium silicate, silicon oxide or glass; the strength of the granules increases with an increase in the thickness of the coating, while the hydrophobicity of the granules increases. Il. 1, bibliography: 1 titles.