FIELD: fire-extinguishing powders for extinguishing classes B, C and E fires.
SUBSTANCE: method involves waterproofing fine silicon dioxide by water-repellent liquid; mixing thereof with main components; grinding the ready product into percussion mill up to grain-size state obtaining. Mass part of powder located under net N 5 is not less than 40%. Component mixing is carried out in the following amounts: sodium bicarbonate is 40 - 70% by weight, fine hydrophobic silicon dioxide is 0.5 - 5.0 % by weight, remainder is water non-soluble mineral or mineral mixture.
EFFECT: reduced energy consumption during powder production, reduced production time, increased fire-extinguishing powder capability, decreased moisture- absorption capability, increased water resistance, improved fluidity.
3 cl, 4 ex
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