Explosive Properties of Agricultural Dusts

15 Oct

 

Explosive Properties of Agricultural Dusts
Type of Dust Ignition temperature of cloud degrees F Minimum ignition energy joules Minimum explosive concentration oz./cu. Ft. Maximum explosion pressure, psig Maximum rate of pressure rise, psi/sec Relative explosion hazard
Alfalfa 860 .320 .1 66 1100 Weak
Cocoa 788 .1 .045 65 1200 Moderate
Corn 752 .040 .045 95 6000 Strong
Corn cob 752 .040 .030 110 5000 Severe
Cornstarch 716 .020 .040 115 9000 Severe
Cotton linters 968 1920 .500 48 150 Weak
Cottonseed 878 .060 .050 104 3000 Strong
Grain, mixed 806 .030 .055 115 5500 Strong
Rice 824 .040 .045 93 3600 Strong
Sugar 662 .030 .035 91 5000 Severe
Tobacco 788 7 200
Wheat 896 .060 .055 103 3600 Strong
Wheat Flour 716 .050 .050 95 3700 Strong
Source: Kennedy, Patrick M., and John Kennedy,
Explosion Investigation and Analysis, 1990.

 

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