FIRE-EXTINGUISHING POWDER AND METHOD OF PRODUCTION THEREOF Russian patent published in 2005 - IPC

FIELD: fire-fighting means, particularly compositions for extinguishing A, B, C and E class fires.

SUBSTANCE: fire-extinguishing powder comprises ammophos, waterproofing liquid and mineral or mineral mixture non-soluble in water. Mineral has real density of 2.6 g/cm³. Mineral contains not more than 5% of particles with dimensions exceeding 200 mcm and not more than 35% of particles with dimensions less than 40 mcm. Method of fire-extinguishing powder production involves separate drying, grinding and following mixing and hydrophobization of the main fire-extinguishing component and target additive. Grinding operation is performed in process line including mill and sizer. When the main fire-extinguishing component is grinded the sizer must have cut point of 30-40 mcm, in the case of target additive grinding the cut point is 70-80 mcm.

EFFECT: increased fire-extinguishing powder throw distance, reduced cost.

2 cl, 3 dwg, 2 tbl