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Minimum Extinguishant and Maximum Oxygen Concentration for Extinguishing Coal Dust-air Explosions.

Authors
Grumer-J; Miller-LF; Bruszak-AE; Dalverny-LE
Source
NTIS: PB 223 877 :6 pages
Link
NIOSHTIC No.
10000472
Abstract
In addition to nine powder and gaseous extinguishants of propagating Pittsburgh seam coal dust-air explosions earlier evaluated, 10 other powders have similarly been evaluated under like conditions such that wall quenching of the coal dust-air flames was virtually absent and the dust concentration was temporally and spatially uniform to within about +/-5 percent. None of the newly examined extinguishants was better than purple-k (potassium bicarbonate). The maximum oxygen concentration for the extinguishment of otherwise uninhibited coal dust explosions and the influence of coal dust particle size and the volatile content of the coal were also explored. For the present, the choice of the inhibitor among the good ones evaluated is not as critical as the system to be used to deploy the extinguishant against a coal dust explosion.
Publication Date
19730101
Document Type
IH; Report of Investigations
Fiscal Year
1973
NTIS Accession No.
PB-223877
NTIS Price
A02
Identifying No.
RI 7782
NIOSH Division
PRC;
Source Name
NTIS: PB 223 877
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