IDENTIFICATION OF GLASS CRYSTALLIZATION PRODUCTS FOR THE PRODUCTION OF FIBERGLASS OBTAINED BASED ON MAN-MADE WASTE FROM THERMAL POWER PLANTS

Achieving technological sovereignty in the field of production of composite materials today requires a rapid increase in production volumes of special-purpose glass fibers. At the same time, scientific solutions in this area must be effective, both from a technological and economic point of view. The article presents research results that form an idea of the possibility of using technogenic waste from thermal power plants in the industrial production of electrical insulating and high-modulus glass fibers. Since the technological efficiency of fiber formation is largely determined by the tendency of melts to crystallize, most of the research was aimed at studying the crystallization process, determining the temperature range of crystallization and identifying the nature of crystallization products. It has been established that in the temperature range of 1100-1200°C the crystallization products are represented by diopside and anorthite, which, with increasing temperature, undergo amorphization and subsequent dissolution in the glass phase. In glass S, the products of crystallization in the temperature range 1200-1300°C are represented by minerals of the continuous isomorphic series albite-anorthite and an insignificant content of ferruginous minerals - magnetite, hematite or goethite. The data obtained will make it possible to develop rational parameters for the process of forming glass fibers or methods for suppressing such an undesirable phenomenon for technology as crystallization in the molding range.