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Why Can't Aluminum Powder Be Extinguished with Water?

1. The chemical properties of aluminum powder

Aluminum powder is also called silver powder, also known as aluminum silver powder. It is a silver-white powder with light texture, high buoyancy, strong hiding power, high stability, good light reflection and heat transfer performance. It can dissolve in acid and alkali, replace hydrogen at the same time, and is insoluble in water. It will chemically react when exposed to a small amount of water or moisture, releasing hydrogen and heat. If the heat does not dissipate, it will easily cause combustion and explosion.

2. Reasons why aluminum powder cannot be extinguished with water

The fire hazard of aluminum powder is that its dust will fly and mix with the air. If it encounters sparks, it will explode and burn. The minimum ignition energy of aluminum powder is 50 millijoules, and the minimum explosive limit concentration is 25 g/m3. It can also form explosive mixtures when mixed with other oxidants. If it comes into contact with acids and alkalis, hydrogen will be produced, and hydrogen is also easy to burn and explode in the air.

As aluminum powder is easy to burn and explode, it should be stored in a dry and ventilated warehouse, away from fire and heat sources. At the same time, it should be stored separately from acids, alkalis and oxidants, and mixed storage and transportation should not be avoided. When handling, load and unload with care to prevent damage to the package. Be extremely careful during use, production, storage, storage and transportation.

Aluminum powder should not be transported in rainy days. Once aluminum powder is found to ignite and explode, it should be quickly extinguished with dry lime powder. Never use water, carbon dioxide, or carbon tetrachloride fire extinguishers to extinguish fires, and do not use pressured dry powder fire extinguishers to extinguish fires. Because water and high-temperature aluminum powder will replace hydrogen, the dry powder with spray pressure will lift up the aluminum powder and mix with air, thereby intensifying the combustion.

Shaanxi Dayu Chemical Co., Ltd. was established in 2006 and is a wholly-owned subsidiary of Dayu Group. It is located in Xi'an, Shaanxi Province, China. Our company is a professional chemical material supplier. Xi'an belongs to China, one of the four ancient civilizations, and it is known as the starting point of the "Silk Road".

Dayu Chemical is a comprehensive chemical company integrating scientific research, manufacturing and international trade of chemical raw materials for low-lethal technology and ammunition. We can provide more than 30 kinds of chemical raw materials, including CS powder, CS liquid solution, OC powder, OC liquid, PAVA, CN powder, CR powder, and pyrotechnic materials such as magnesio powder and aluminum powder. The annual production capacity of CS powder is 400 tons/year. The company is equipped with advanced LCMS, high performance liquid chromatography, gas chromatography and other analytical instruments. And established a complete quality control system to ensure efficient, stable and controllable production. The company has passed ISO9001 quality management system certification, you are welcome to consult our products online!

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