Class D fire extinguishing agent and preparation method thereof

Abstract

A class D fire extinguishing agent is prepared by using the following components, by mass, 68-74% of sodium chloride, 5-8% of talcum powder, 7-10% of halogen-free flame retardant powder, 4.2-6% of white carbon black, 7-10% of calcium chloride, 1.2-1.7% of silicone oil and 0.3-0.7% of magnesium powder. A preparation method of the class D fire extinguishing agent comprises the following steps: respectively crushing sodium chloride, talcum powder, the halogen-free flame retardant powder, white carbon black and calcium chloride to form powders; and dehydrating sodium chloride, drying, mixing the dried sodium chloride with the talcum powder, the halogen-free flame retardant powder, the white carbon black and calcium chloride, and fully and uniformly mixing at a certain temperature, baking, adding the silicone oil, continuously baking, uniformly mixing, adding the magnesium powder, and uniformly stirring to prepare the finished extinguishing agent. In the invention, the above sodium salt is adopted as a main material, a small amount of the flame retardant is added, and the flame retardant, a catalyst and a metal substance in the sodium salt are effectively introduced and are finally effectively combined in order to effectively extinguish class D metal alkyl substance fires.

Description

technical field [0001] The invention belongs to the technical field of fire protection, and relates to a fire extinguishing agent, in particular to a fire extinguishing agent capable of effectively extinguishing Class D fires and a preparation method thereof. Background technique [0002] Fires are divided into Classes A, B, C, D, E, and F. Class D fires rank fourth in the fire category and are uncommon fires. There are also certain similarities and distinctions in Class D fires, such as: metal magnesium, metal titanium, aluminum powder, magnesium alloy, and aluminum alloy are fires that are easier to extinguish in Class D fires, because they do not melt when burning, burn directly. Class D fire is a relatively special and uncommon metal burning fire, which is quite difficult to extinguish, especially the fire extinguishing agents that can effectively extinguish alkyl metal fires are few and far between. With the rapid development of modern industry and the continuous incr...

AI Technical Summary

Problems solved by technology

In the sense of fire extinguishing, the general fire extinguishing agent adopts single body as the fire extinguishing agent, and the fire extinguishing effect is not ideal, so it is also the reason why sodium chloride dry powder fire extinguishing agent has not been popularized for a long time.

Ordinary sodium chloride dry powder fire extinguishing agents are not ideal for metal fires, especially when extinguishing alkyl metal fires. That is to say, sodium chloride dry powder cannot be used in alkyl metal fire extinguishing devices.