METHOD FOR PRODUCING HYDROPHOBICALLY MODIFIED POWDERS AND METHOD FOR DETERMINING THEIR EXTINGUISHING ABILITY

The joint grinding of the components of the extinguishing powder and hydrophobically modifying additives (HMA) on the basis of peat organic matter in a ball mill was held in order to determine the possibility of using these additives as an anticaking agent. Hydrophobically modifying additives are the product of the process of low-temperature thermochemical decomposition of organic matter crushed peat (particle size less than 50 microns) based on the decomposition of organic compounds and sorption of liquid products allocated on the surface of fine peat particles. The experimental composition with HMA instead of hydrophobizing component was resulted by co-grinding of industrial powder components without hydrophobic additives (fumed silica, aerosil) in a ball mill. The original method of testing powder extinguishing agents was developed. The research assesses the influence of water-repellent additives HMA over extinguishing powder's effect when putting out standardized classes A and B fires sources in a specially designed laboratory facility of Ivanovo Institute of State Firefighting Service of Emercom of Russia. The developed compositions of extinguishing powders with hydrophobically modified additives on the basis of peat organic matter meet the criteria for extinguishing capability and allow to organize their production in an industrial environment without disturbing the actual technical processes used for production of powders.