METHOD FOR THERMAL TREATMENT OF GLASS-SILICEOUS PLATES Russian patent published in 1997 - IPC

FIELD: construction material industry. SUBSTANCE: this relates to technology of producing glass-siliceous plates used for external and internal finishing of buildings. Glass-siliceous plates subject to thermal treatment are made of granulated glass or mixture of granulated glass and sand, also included are dust-like fractions of glass. Production process includes heating of materials in form and holding at maximal temperature. Prior to heating, introduced into raw composition is dust-like material of same grading as dust-like fractions of glass and of softening temperature being by at least 50 C higher than that of glass-siliceous material and in amount equal to or 30% higher than mass percent content of dust-like fractions of glass in primary material. Maximal temperature of thermal treatment is preset so that viscosity logarithm of glass-siliceous material is equal to 4.5-5 Pa.s. EFFECT: high efficiency. 2 dwg