铝粉及铝镁混合粉的爆炸特性

Study on the explosion characteristics of aluminium powder and aluminium magnesium mixed powder

为了探究铝粉及铝镁混合粉爆炸特性参数的变化规律,采用20 L球型粉尘爆炸测试系统对不同粒径的铝粉爆炸产生的爆炸压力、爆炸压力上升速率和爆炸指数规律进行了研究,并进一步探讨了加入镁粉对铝粉爆炸特性产生的影响。结果表明:铝粉的爆炸压力、爆炸压力上升速率和爆炸指数均随着铝粉浓度的增加呈先增大后减小的趋势;在相同浓度下,小粒径的铝粉爆炸产生的压力、爆炸压力上升速率和爆炸指数明显大于大粒径铝粉,说明小粒径铝粉爆炸产生的破坏力更大。另外,与同粒径的铝粉相比,镁铝混合粉爆炸产生的压力、爆炸压力上升速率和爆炸指数更大,说明镁粉的加入增大了铝粉的火灾爆炸危险性。

In order to investigate the change rule of explosive characteristic parameters of aluminum powder and aluminum magnesium mixture powder,the explosive pressure,explosive pressure rising rate and explosive index of aluminum powder with different particle sizes were studied by using the 20L spherical dust explosion test system,the effect of adding magnesium powder on the explosive characteristics of aluminum powder was also discussed.The results show that the explosive pressure,explosive pressure rising rate and explosive index of aluminum powder increase firstly and then decrease with the increase of aluminum powder concentration.At the same concentration,the explosion pressure,explosion pressure rising rate and explosion index of aluminum powder with small particle size are obviously larger than those of aluminum powder with large particle size,indicating that the explosive power of aluminum powder with small particle size is greater.In addition,compared with the aluminum powder with the same particle size,the explosion pressure,explosion pressure rising rate and explosion index of the Mg-Al mixture powder are larger,which indicates that the addition of magnesium powder increases the fire explosion risk of aluminum powder.