ABC superfine dry powder extinguishing agent and preparation method thereof

The invention relates to the field of fire fighting and extinguishing and discloses an ABC superfine dry powder extinguishing agent and a preparation method thereof. The extinguishing agent comprises the following components by mass percent: 3-5% of mica powder, 3-6% of hydrophobic fumed silica, 0.9-1.5% of high-boiling silicone oil, 0.8-1.5% of water, 1-1.5% of gasoline and the balance of ethylenediamine phosphate. The prepared ABC superfine dry powder extinguishing agent has the beneficial effects that as 90% of particle sizes are less than or equal to 12mu m, the properties of the ABC superfine dry powder extinguishing agent meet relevant requirements of GA578-2005 superfine dry powder extinguishing agents, and the ABC superfine dry powder extinguishing agent can achieve the total flooding extinguishing and flooding extinguishing effects; moreover, the dry powder extinguishing agent has excellent water repellency and long storage period and is especially suitable to serve as the extinguishing agent of wate