CRUDE MIXTURE FOR PRODUCING FOAMED SILICATE MATERIAL AND METHOD OF PRODUCING FOAMED SILICATE MATERIAL (VERSIONS) Russian patent published in 2010 - IPC C03C11/00 

FIELD: chemistry.

SUBSTANCE: invention relates to foaming compositions based on magmatic aluminosilicate rock, particularly to production of foamed silicate heat insulation material. The crude mixture for producing foamed silicate material, which contains magmatic rock and a gas-forming agent, contains magmatic rock containing 40-75 wt % SiO₂, zeolite-containing tuff as a gas-forming agent, as well as flux which contains 40-84 wt % Na₂O or K₂O, with the following ratio of components, wt %: said rock 45.0-77.0, said flux 8.0-15.0, zeolite-containing tuff 15.0-40.0. The method of producing foamed silicate material involves preparation of the said crude mixture by mixing its components, moistening with an aqueous solution of liquid glass with density of 1.15-1.3 g/cm³ in ratio solid: liquid equal to 1.4-1.9, moulding granules, drying and expanding the granules by burning at 700-900°C. In another version, granules are prepared by seasoning the crude mixture until solidification and then crushing the hardened mass. In both versions of the method, expansion is carried out in moulds or in free state.

EFFECT: low power consumption, production of foamed silicate materials with wide range of density.

7 cl, 2 tbl, 12 ex