RAW MIX FOR GRANULATED HEAT-INSULATION MATERIAL AND A METHOD FOR MANUFACTURE THEREOF Russian patent published in 2006 - IPC C04B28/26 

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to preparing artificial porous products and can be used in manufacture of granulated heat-insulation material serving as especially light aggregate for concretes suitable for industrial and civil engineering. Raw mix contains, wt %: microsilica, 41.37; residual product obtained in sulfate-type processing of wood containing 91.8% of substances insoluble in 72% sulfuric acid (on conversion to dry solids), 0.21; 54.22% sodium hydroxide solution (calculated as Na₂O), 21.97; and water, 36.45. Manufacture of heat-insulation material involves preparation of suspension from ingredients of mix, hydrothermal treatment at 80-90°C and atmospheric pressure for 10-15 min, granulation and subsequent heat treatment of crude granules at 350-400°C for 10 min.

EFFECT: reduced power consumption due to eliminated stage of preliminary heat treatment, reduced loose density, and increased total porosity of material.

2 cl, 3 tbl