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提起爆炸,人们自然与炸药联系起来,但在法国的摩泽尔阿峰梅斯新港却发生了一起特殊的爆炸。那是1982年10月18日中午,新港内的七座巨大筒状粮仓,突然响起一阵闷雷似的爆炸声,火光窜上天空,四座粮仓彻底倒塌,另三座顶部炸去。警方对现场进行了周密的调查,结论是:这场爆炸并非炸药引起,祸根是粉尘!这一结论,使得人们目瞪口呆。微小的粉尘为什么会引起爆炸呢?这是因为粉尘也和任何物质一样具有能量,而且由于它颗粒小,表面积大,表面能也大。一块一克重的煤,其表面积只有5—6平方厘米,而一克煤粉则表面积达2平方米。一块一公斤重的氧化硅表面能为027焦耳,研成粉末后表面能是前者的一百万倍!当这种带能量的粉尘浓度达到“爆炸临界”浓度时,再遇到火星、电弧、适当的温
Mentioning the explosion, people are naturally associated with explosives, but a special explosion occurred in Newport, Moselle, France. It was at noon on October 18, 1982, at seven huge cylindrical silos in Newport. Suddenly a thundering explosion was sounded, and the flames went up into the sky. Four granaries collapsed completely and the other three were blown to the top. The police conducted a thorough investigation of the scene and concluded that this explosion was not caused by explosives and that the root cause was dust! This conclusion has caused people to be stunned. Why does tiny dust cause explosions? This is because dust is as energy-efficient as any material, and because of its small particle size, large surface area and large surface energy. A gram of coal, the surface area of only 5-6 square centimeters, while one gram of coal surface area of up to 2 square meters. A one kilogram of silica surface energy of 027 Joule, into powder after the surface energy is one million times the former! When this concentration of dust with energy to “critical explosion” concentration, and then meet the Mars, the arc, Appropriate temperature