METHOD OF PRODUCING FINELY DISPERSED CRYSTALLINE POWDER OF SYNTHETIC MINERAL ALLOY FOR FIRE-EXTINGUISHING POWDER COMPOSITIONS Russian patent published in 2017 - IPC C04B32/00 A62D1/00 B22F9/06 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and can be used for production of fine powders, in particular used as target additive to fire extinguishing powders in order to improve their fluidity. Raw material used is fused synthetic mineral alloy containing oxides of silicon, aluminium, calcium, iron, magnesium, titanium, chromium, potassium and/or sodium. To produce finely dispersed crystalline powder material is melted, primary fibre is stretched from obtained melt, which is cooled in air. Cooled primary fibre is subjected to grinding to produce a powder containing 55–60 wt% particles with size of 40–50 mcm and 25–30 wt% particles with size of up to 100 mcm.

EFFECT: technical result consists in possibility of obtaining fine crystalline powder, having chemical, fractional compositions and fluidity corresponding to target additives used in fire-extinguishing powder compositions with minimum power consumption.

1 cl