FOAMING MIXTURE AND A METHOD OF PRODUCTION OF A MODULAR FOAMED GLASS WITH THE MIXTURE USE Russian patent published in 2005 - IPC

FIELD: methods of production of effective functional heat-insulating materials with a low value of their thermal conduction and densities.

SUBSTANCE: the invention is pertaining to the methods of production of effective functional heat-insulating materials with a low value of their thermal conduction and densities, in particular, to the methods of production of the vitreous silicate materials, namely, the foamed glass with usage of a foaming mixture and is dealt with utilization of the vitreous wastes produced as a result of the household vital activity of people, and also the technogenic products of the people household activity and industrial origination. The problem of the offered invention is production of an effective functional modular foamed glass with improved operational characteristics: an apparent density - 0.15-0.45 g/cm³, high heat-insulating properties λ = 0.06-0.08 W/(m·°K), volumetric water adsorption of no more than 10%, capable to withstand mechanical loadings of no less than 7 kg/cm²; utilization of alkaline silica-alumina and borosilicate vitreous wastes of different kinds of glass, both individual glass and mixtures of glasses. The foaming mixture for production of the modular foamed glass includes I in mass %): active carbon-black with a specific surface area of 50-100 m/g -20-70; sulfates of alkaline-earth elements - 10-40, carbonates of alkaline-earth elements - 20-40. The method of production of the modular foamed glass with a usage of the foaming mixture provides for: a dispersion of the utilized glassbats up to the specific surface of 15000-20000 cm²/g; an addition to 95.0-99.8 mass % of the dispersed glassbats of 0.2-5.0 mass % of the foaming mixture; agitation at humidity of 1.2-1.5 mass %; granulation into particles with the diameter of no more than 2000 microns; a filling of the granules in the mold and their subcompaction up to a porosity of 0.35-0.55; sintering at the temperature of 600-750°C; a foaming at the temperature of 800-900°C, a hardening by temperature decrease to 550-650°C at the rate of 200°C /minute and annealing at the temperature of 500-600°C.

EFFECT: the invention ensures production of an effective functional modular foamed glass with improved operational characteristics.

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