RU1797923C - Fire-extinguishing composition and method for its production - Google Patents

Abstract

Use: to obtain an extinguishing powder composition. SUMMARY OF THE INVENTION: a fire extinguishing powder composition contains, by weight,%: hydrophobizing silicone fluid, 0.2-1.0; white carbon 1.0-4.0; aluminum silicate 4.0-16.0 and the main component is the rest. As the main component, the composition contains sylvinite, ammophos. To prepare the composition, white carbon black is subjected to heat treatment at 100-400 ° C to a mass fraction of moisture of 0.1-0.5%, then it is mixed with aluminosilicate, crushed to an average particle size of 10-125 microns and not later than 10 hours mixing all the components to a homogeneous mixture, the inhomogeneity coefficient of which is not more than 10%, and then they subject the mixture to mechanochemical activation in an impact apparatus with an energy intensity of at least 10 W / kg. 2 sec and 1 zpp-fs, 1 tab. CO C

Description

The invention relates to fire extinguishing powder compositions used to extinguish fires of various combustible materials, and methods for preparing the compositions, and may find application in the chemical industry in the manufacture of fire extinguishing agents.

The aim of the invention is to reduce the caking and cost of the composition, simplifying the process of its preparation.

The described fire extinguishing powder composition includes a hydrophobizing organosilicon liquid, the addition of highly dispersed silicon dioxide and the main component, moreover, as a highly dispersed silicon dioxide, the composition contains white soot with a specific surface area of at least 100 m / h and additionally contains aluminosilicate at

following component ratios. wt.%:

Hydrophobic organosilicon

liquid 0.2-1.0 White carbon 1.0-4.0 Aluminosilicate 4.0-16.0 Main component Else It contains sylvinite, ammophos as the main component.

A method of obtaining a fire extinguishing powder composition is that the carbon black is subjected to heat treatment at 100-400 ° C to a mass fraction of moisture of 0.1-0.5%, it is mixed with aluminosilicate, crushed to an average particle size of 10-125 microns and not later For 10 hours, all components are mixed to a homogeneous mixture, the heterogeneity coefficient of which is not more than 10%, and then subjected

h u vj

oh w

a mixture of mechanochemical activation in an impact apparatus with an energy intensity of at least 10 W / kg.

Aluminosilicate is a natural or synthetic silicate containing aluminum and silicon atoms in the complex anion, for example, A15 04 G A 5120b, etc.

Bela soot is a finely divided precipitated silica SIQ2.

A method for producing a fire extinguishing powder composition is carried out as follows.

White carbon black is subjected to heat treatment in an apparatus of any type with heating at a temperature of 100-400 ° C to a mass fraction of moisture of 0.1-0.5%, then mixed with aluminosilicate. And the mixture is ground. to an average particle size of 10-125 microns. The resulting mixture of white carbon black with aluminosilicate, not later than 10 hours later, is combined with the main component (salt of phosphoric, hydrochloric, allophanic acid) and organosilicon oligoethylhydride-siloxane-liquid in the ratio, wt.% ;:

Bela soot. 1-4 Cream and organic liquid. 0.2-1.0. . . Aluminosilicate 4-16 Main Component Remaining Mixing is carried out in a mixer until a homogeneous mixture is obtained, characterized by an inhomogeneity coefficient of not more than 0%. The resulting homogeneous mixture of components is subjected to mechanochemical activation in a grinder. shock action. an energy intensity of at least 10 W / kg, Example 1. 12.5 kg of BS-120 soot with a specific surface of 100 m2 / are heat treated at a temperature of 100 ° C to a mass fraction of moisture of 0.1% in an oven, then mixed with . 50.0 g of aluminosilicate in a belt mixer and ground in a vibration mill to an average particle size of 10-125 microns. As aluminosilicate, a nepheline concentrate is a natural aluminosilicate with the general chemical formula 4 (Na, K) r0 4 5Yyg. After 1 hour, the prepared components are mixed using a paddle mixer with 3.0 g of organosilicon liquid and 434.5 g of sylvinite (mass ratio of components: carbon black - 2.5%; aluminosilicate 10%; organosilicon liquid - 0.6%; sylvinite -86 ,9%). Mixing is carried out to obtain a mixture with a coefficient. heterogeneity of 5.0%. Then, 500.0 g of the resulting mixture is subjected to mechanochemical activation by grinding in a ball mill with an air strength of 10 W / kg. The product is sieved and packaged.

Other examples of the method, the characteristics of the extinguishing compositions, as well as data on known compositions and methods for their preparation, are given in the table. In all examples, except for 3, we used white carbon black with a specific surface of 100 m / g, and nepheline concentrate was used as aluminosilicate.

As can be seen from the table, the technical and economic advantages of the claimed 5 technical solutions in comparison with the known solutions consist in reducing caking to 25-30 g (for the prototype 45 g), lowering the cost to 1 rub / kn (for the prototype T , 5-1.8), in simplifying the process of obtaining the composition.

Claims (2)

1. Fire extinguishing powder composition. including hydrophobic organosilicon liquid, the addition of high-disperse silica and the main component, characterized in that, in order to reduce caking and cost of the composition, it contains 0 white carbon black with a specific surface area of at least 100 m / g , and also additionally contains aluminosilicate in the following ratio of components, wt,%: Water-repellent organosilicon- 5 chesk liquid 0.2-1.0 White carbon 1.0-4.0 Aluminosilicate 4.0-16.0 Main component The rest. 0 2. The fire extinguishing composition according to claim 1, which is characterized in that it contains sylvinite, ammophos, as the main component, 5 s A method of producing a fire-extinguishing powder composition, including mixing the components and heat treatment, such as the fact that, in order to reduce the caking properties and cost of the composition, white carbon black is subjected to heat treatment at 100-400 ° C to mass moisture content of 0.1-0.5%, mix it with aluminosilicate, grind to an average particle size of 10-125 microns and no later than 10 hours carry out the mixing 5 of all components to a homogeneous mixture, the heterogeneity coefficient of which is not more than 10%, and then the mixture is subjected to mechanochemical activation in an impact apparatus with an energy intensity of at least 10 W / kg. 1 White soot (EU) with a separate surface i .100, 5 0.1 Dovorov10 mill (udder e hole)