RAW MIX AND A METHOD OF PRODUCTION OF A GRANULAR HEAT-INSULATION MATERIAL Russian patent published in 2005 - IPC

FIELD: construction materials industry; production of a granular heat-insulation material.

SUBSTANCE: the invention is pertaining to the field of construction materials industry, in particular, to production of porous artificial articles and may be used at production of the granular heat-insulation material - the especially lightweight filler for concretes of industrial and civil engineering. The technical result is exclusion from a constructional raw mix of boric acid, a decrease of power input due to exclusion of a phase of a preliminary thermal treatment of green granules, a decreased bulk density and an increased general porosity of the granular heat-insulation material. A raw mix for the granular heat-insulation material includes, in mass %: micro-silica - 41.37, a sulfate soap with concentration of 40 % in terms of a dry substance - 0.21, a solution of sodium hydroxide with concentration of 45,22 % in terms of_{Na2O - 21.97, water - 36.45. The method of production of the granular heat-insulation material from the raw mix provides for preparation of a suspension out of components of the raw mix, its hydrothermal treatment at 80-90°C and an atmospheric pressure during 10-15 minutes, granulation and the following heat-treatment of the green granules at 350-400 °C during 10 minutes.}

EFFECT: the invention ensures exclusion from a constructional raw mix of boric acid, a decreased power input and the bulk density of the granulers, an increased general porosity of the granular heat-insulation material.

2 cl, 3 tbl