Comparative Study On Explosive Dust And Industrial Dust Explosion Characteristics

RDX(blasting explosive dust), aluminium powder (industrial dust) as well as their mix dust are taken as the object of study, whose detonation characteristic is studied by 1.2 liter Hartmann tubes.First, the detonation characteristic of RDX and aluminium powder was studied.the experimental result shown that: the detonation characteristic of blasting explosive dust (RDX) and general industrial dust ( aluminium powder) has the very big difference. Regarding the general industrial dust aluminite powder, the firing delay time influence is very obvious to the most tremendous pressure rise speed and the maximum explosion pressure of the general industrial dust; the maximum explosion pressure and the maximum pressure rise speed reduces along with the dust granularity increases, and the increases tendency is obvious; it has a best dust loading, which causes its maximum explosion pressure and the maximum pressure rise speed maximizing. But regarding the blasting explosive dust, based on the air oxygen concentration is its detonation essential condition by no means; The firing delay time influence is not obvious to the most tremendous pressure rise speed and the maximum explosion pressure; The dust granularity influence is very small to the maximum explosion pressure , the maximum pressure rise speed reduces along with the dust granularity increases, but the tendency does not have the general industrial dust to be obvious; The maximum explosion pressure and the maximum pressure rise speed along with the dust loading increases, but the linearity increases.Second, the detonation characteristic of aluminite powder and RDX mix dust has conducted by the experimental study, as well as the maximum pressure rise speed and the mix dust's allocated proportion relations may see two kind of dust from its maximum explosion pressure when certain allocated proportion, both existence synergism. Its maximum explosion pressure and the maximum pressure rise speed is higher than under obviously the same density the pure aluminite powder and time the pure cyclotrimethyl dust explosion value.People have a better understanding of industrial dust explosion characteristics through the study, and it provides the design anti-explosion basis for the production, storage, transportation of the dust.