Aluminum Dust Explosion Suppression Performance and Mechanism of a New Mesoporous Composite Explosion Suppressant

In this paper, using a 20 L spherical explosive device and a Hartmann device, we carried out explosion suppression experiments on 19 and 30 mu m aluminum powders (500 g/m3) with different concentrations of the new explosive suppressants (MCM41@CS-APP) and CaCO3 and elaborated on the suppression mechanism of the explosion of MCM41@CS-APP on aluminum powder. The experimental results show that when the concentration of the explosion suppressor is 50 g/m3, the maximum explosion pressure (P max) produced by the explosion of mixed dust is higher than that of the explosion of aluminum powder, and with the increase of the concentration of the deflagration suppressant, the P max of the mixed dust decreases. When the concentrations of MCM41@CS-APP and CaCO3 reached 400 g/m3, the P max of the mixed dust (Al = 19 mu m) was 0.133 and 0.364 MPa, which decreased by 81.3% and 48.9%, respectively. The P max of the mixed dust (Al = 30 mu m) was not significant. Both detonation inhibitors inhibited the explosion of aluminum powder; the detonation duration of Al/MCM41@CS-APP is shorter; there are fewer aluminum particles in the product; and the initial oxidation temperature of aluminum powder is higher.