FIRE-EXTINGUISHING POWDERED COMPOSITION

FIELD: fire extinguishing. SUBSTANCE: fire-extinguishing powdered composition, fit for extinguishing fires occurring in chemical, petrochemical, coal, wood-working, and other industries, contains: (i) as high-dispersed additive, silica-hydrate with specific surface at least 100 sq.m/g in amount 0.5 to 3.0%; (ii) as flowability-imparting additive, 6.0 to 23.0% of ion-lattice mineral with complex anionic groups with density at least 2.8 g/cu.cm depicted by empirical formula 1: (1) or phosphorite flower with density at least 2.8 g/cu.cm; (iii) as modifying waterproofing organosilicon fluid, methylhydridosiloxane with active hydrogen level 1.6-1.7% or mixture of methylhydridosiloxane (as modifier base) with hardening catalyst: aminoethylaminopropyl(trimethoxy)silane at ratio (5-70): 1, respectively, modifier being taken in the form of 10-70% solution in organochlorine solvent in amount 0.2 to 0.6% on the wt of powdered mixture (calculated as solids); and (iv) as base component, complex fertilizer of the NP and/or PK, and/or NPK type. EFFECT: simplified and intensified powder manufacture process, reduced laboriousness and material consumption, and improved hydrophobicity and flowability of powder. 1 tbl