FIELD: process engineering.
SUBSTANCE: invention relates to production of fillers to be used in compositions of heat insulation materials and coats. Liquid glass is mixed with magnesium carbonate in amount of 3% to 10% of total volume of mix. The latter is dries at 5-40°C and minced to 3-100 mcm-grain size. Then, glass bearing powder is treated at 150-500°C to comply with preset foaming, curing and cooling level. In production of expanded glass to be used in composition of fire-insulation coat expansion ratio is set to 10% of initial volume while heat treatment is carried out at lower temperatures of preset temperature range. In production of expanded glass to be used in composition of heat-insulation coat expansion ratio is set to 1000% of initial volume while heat treatment is carried out at higher temperatures of preset temperature range.
EFFECT: decreased temperature of heat treatment.
3 cl, 2 ex
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