Table 6 Suppression of mixed explosion suppression dust on suspended coal dust explosion pressure.

From: Ignition temperature and explosion pressure of suspended coal dust cloud under different conditions and suppression characteristics

p (%)

Al(OH)3 and KH2PO4

Al(OH)3 and NH4H2PO4

KH2PO4 and NH4H2PO4

Pmax (MPa)

(dP/dt)max (MPa s−1)

Pmax (MPa)

(dP/dt)max (MPa s−1)

Pmax (MPa)

(dP/dt)max (MPa s−1)

0

0.78

73.27

0.78

73.27

0.78

73.27

10

0.73

62.36

0.70

57.26

0.67

48.69

20

0.64

57.43

0.60

48.19

0.53

41.92

30

0.58

50.93

0.51

40.98

0.42

32.55

40

0.52

42.47

0.42

32.77

0.36

23.28

50

0.46

38.04

0.28

24.08

0.19

14.73

60

0.37

27.35

0.16

18.62

–

–

70

0.26

20.82

–

–

–

–

80

0.15

18.20

–

–

–

–

90

–

–

–

–

–

–

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