## 3 Result and Discussion
In the process of explosion, the active powder of the new explosion inhibitors can play the role of pyrolysis and cooling, and the modified solid waste as the carrier can produce fine particles to quench the flame after explosion; therefore, it can play the role of explosion suppression. Considering both the explosion suppression and explosion propagation suppression results, by coal dust explosion suppression efficiency, the three kinds of red mud-based composite powder explosion inhibitors are sorted as MCN-NaHCO\({}_{3}\) composite powder explosion inhibitor > MCN-KH\({}_{2}\)PO\({}_{4}\) composite powder explosion inhibitor > MCN-Al(OH)\({}_{3}\) composite powder explosion inhibitor. Figure 8 compares the coal dust explosion suppression characteristic data between industrial solid waste-based composite powder explosion inhibitors and pure powers at the blend ratio of 30%. Figure 7: Explosion suppression characteristics of red mud based composite powder explosion inhibitors on coal dust. (**a**). MCN-NaHCO\({}_{3}\) composite powder explosion inhibitor; (**b**). MCN-KH\({}_{2}\)PO\({}_{4}\) composite powder explosion inhibitor; (**c**). MCN-Al(OH)\({}_{3}\) composite powder explosion inhibitor. Through statistical analysis, it can be obtained from the analysis of different carrier composite powder explosion inhibitors that among a variety of industrial solid waste-based composite powder explosion inhibitors, the MSA-carried composite powder explosion inhibitor has the best explosion inhibition effect on pulverized coal. At the content of 30%, the _P_max reduction rate reaches 52%. As the carrier MSA pores are relatively developed, more loaded bodies can be combined in the compounding process, and the content of hydroxide is higher; therefore, the explosion suppression effect of MSA-carried composite powder explosion inhibitor is the best. The inhibition rate of the 30% MCN-carried composite powder explosion inhibitor on the _P_max of pulverized coal explosion reaches 49.4%. Due to the low content of hydroxide in MFA and the poor pore development in the four carriers, the explosion suppression effect of MFA-carried composite powder explosion inhibitor is the worst, and the inhibition rate of the _P_max of pulverized coal explosion is only 46.5%. Combined with the analysis results of the loading rate of the modified industrial solid waste material on the active powder material, as shown in Figure 7, it can be obtained that the explosion suppression effect of the industrial solid waste-based composite powder explosion inhibitors is related to the pore development degree of the negative carrier. The more developed the pores are, the higher the loading rate on the active powder material is, and the better the explosion suppression effect is. Due to the different inhibition effects of active powder materials on coal dust explosion, the inhibition effects of different loaded composite powder explosion inhibitors on coal dust explosion are also different. According to the statistical results of experimental data, it is found that the composite powder explosion inhibitors are sorted as industrial solid waste-based NaHCO\({}_{3}\) composite powder explosion inhibitor? industrial solid waste-based KH\({}_{2}\)PO\({}_{4}\) composite powder explosion inhibitor? industrial solid waste-based Al(OH)\({}_{3}\) composite powder explosion inhibitor. It is concluded that the active powder material (NaHCO\({}_{3}\)) has the best inhibitory effect on coal dust explosion, followed by KH\({}_{2}\)PO\({}_{4}\), and then Al(OH)\({}_{3}\).