Актуальные научные исследования в современном мире iscience. In. Ua

«MODERN SCIENTIFIC CHALLENGES AND TRENDS»
 
SCIENCECENTRUM.PL 
ISSUE 3 
ISBN 978-83-949403-3-1 
24
suppression of explosions of gas-air mixtures and study of the fire-extinguishing 
ability of expired standard flame retardant powders.
 
The analysis of last researches and publications shows that determined 
rational correlation of components in the many fire-extinguishing mixtures on the 
base of overdue powder with addition of dolomite and limestone dust on which fire-
extinguishing efficiency; experimentally established indexes of the overdue 
powders, waste of metallurgic production and recommended fire-extinguishing 
mixtures.
 
The manuscript is intended for the following unresolved earlier part of 
general problem: determination explosion ability of fine-dispersion substances as 
slaked lime, standard fire extinguishing powder containing ammophos, sludge from 
the chemical unit (filtered) of the cold rolling plant of the steel sheet containing iron 
oxide, dolomite dust, baking soda (sodium bicarbonate), natural gypsum and the 
precipitate is neutralized by acidic effluent as well investigation the influence of 
foresaid substances on explosion of gas-air mixture.
 
The purpose of manuscript is investigation fire-extinguishing ability of 
powder material at the volumetric extinguishing as well suppression explosions of 
gas-air mixtures. 
 
The presentation of main material. Powder formulations have well-known 
disadvantages, the main of which is their tendency to caking and balling. This loses 
the ability of powders to be transported through pipelines, and form a fire 
extinguishing cloud.
 
Even in the manufacture of powder can absorb up to 5-10% of moisture from 
the humid air of the shop, if it is not protected from moisture absorption by special 
additives. When Packed in a fire extinguisher, it is subjected to shaking and 
vibration during transport or during its service on transport and equipment. 
Bahamas in such conditions, the powder must retain the fluidity of capacity (a good 
release). In solving this problem means a lot not only the chemical composition of 
the powder, ie. special additives to the base material, but also the technology of its 
manufacture, thermo and vibration resistance of the powder, its anti - traceability 
and a number of others[1-3].
 
The explosion spread flame to the top of the reaction vessel, the absence or 
the burst of flame was observed visually. The results of the research were recorded 
in the observation log (table 1).
 
Explosion as the shaded point - 
о, its absence as a shaded point-

In the 
objects of study were taken the following fine-dispersion substances: