Explosion Flame and Pressure Characteristics of Nonstick Coal Dust and the Inhibition of Explosion Suppressants

Table 5

Inhibition of an explosion suppressant on the explosion pressure of nonstick coal dust.

(%)	SiO2		KCl		NH4H2PO4
	Pmax (MPa)	(dP/dt)max (MPa/s)	Pmax (MPa)	(dP/dt)max (MPa/s)	Pmax (MPa)	(dP/dt)max (MPa/s)
0	0.63	40.79	0.63	40.79	0.63	40.79
10	0.57	35.67	0.56	34.82	0.52	30.43
20	0.49	32.18	0.47	31.41	0.42	26.41
30	0.43	30.20	0.41	29.95	0.36	22.68
40	0.38	28.75	0.36	27.63	0.30	18.23
50	0.34	26.49	0.32	25.33	0.25	15.14
60	0.31	24.17	0.30	23.67	0.21	13.95
70	0.29	23.06	0.26	21.93	—	—
80	0.27	22.12	0.24	20.46	—	—

, mass percentage of explosion suppression dust mixed with nonstick coal dust.