火炸药粉尘云最小点火能的实验研究

Experimental Research on Minimum Ignition Energy of Explosives Material Dust Cloud

为了了解HMX粉尘与FOX-7粉尘的燃爆特性,评价其潜在危险性,利用1.2 L哈特曼管式粉尘云爆炸装置,分别对粉尘浓度、粒度、环境湿度对两种物质最小点火能(E_(min))的影响进行了研究与分析。研究结果表明:2类HMX、5类HMX与FOX-7三种粉尘着火的最敏感浓度分别为916.66 g·m^(-3)、833.33 g·m-3与833.33 g·m-3;所对应的Emin分别为12.45 m J、15.75 m J、19.01 m J。粉尘浓度、环境湿度对两种物质的最小点火能均有显著影响;最小点火能随粒度的减小而降低。

In order to understand the explosion characteristics of HMX dust and FOX-7 dust,the potential risk was evaluated. The effects of dust concentration,particle size and environmental humidity on the minimum ignition energy（ E_（min）） of two substances were studied by 1. 2 L Hartmann tube dust cloud explosion device. The results showed that the most sensitive concentrations of 2 HMX,5 HMX and FOX-7 were 916. 66 g·m-3,833. 33 g·m-3 and 833. 33 g·m（-3）,respectively,and Eminwere 12. 45 m J,15. 75 m J and 19. 01 m J respectively. Dust concentration and ambient humidity have a significant effect on the minimum ignition energy of both materials and the minimum ignition energy decreases with the decrease of particle size.