FIRE-EXTINGUISHING POWDER PRODUCTION METHOD Russian patent published in 2007 - IPC A62D1/00 

FIELD: fire-fighting, particularly powder fire-extinguishing compositions to be used for combustible liquid and gas fire suppression, as well as to extinguish energized electric equipment.

SUBSTANCE: method involves performing hydrophobization of highly-dispersed silicone dioxide with water-repellent silicone fluid, namely with ethyl hydrosiloxane; mixing powder composition components taken in the following amounts (% by weight): sylvinite - 70-90, highly-dispersed water-repellent silicone dioxide 1-8, muscovite, talc, talc-magnesite, silicon dioxide or mixture thereof - remainder, wherein silicon dioxide is waste product of fluoric aluminum production obtained during aluminum hydroxide decomposition with fluorosilicic acid; grinding above composition to obtain powder mass fraction retained on gause №01 of not more than 17% and under gause №005 of not less than 60%; drying the obtained powder composition at 100-250°C to obtain moisture mass content of not more than 0.35%.

EFFECT: increased fire-extinguishment ability, flowability, decreased moisture absorption and caking ability.

2 cl, 1 tbl, 8 ex