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Laboratory and large-scale dust explosion research.

Authors
Cashdollar KL; Weis ES; Greninger NB; Chatrathi K
Source
Plant/Oper Prog 1992 Oct; 11(4):247-255
NIOSHTIC No.
10003380
Abstract
This paper describes dust explosibility research in full-scale experimental mines and a 20-L laboratory chamber at the U.S. Bureau of Mines and in a 1-m3 laboratory chamber at Fike Corporation. The purpose of this research is to improve safety in mining and other industries that manufacture, process, or use combustible dusts. As part of this work, carbonaceous dusts with a wide range of volatilities and various particle size distributions were studied. Laboratory data on the minimum explosible concentrations of predispersed dusts were comparable to mine data for nominal dust loadings that were dispersed by the aerodynamic disturbance from a gas ignition zone. Recommendations are given on the limitations of small-scale testing such as "overdriving" by too strong of an ignitor. The effect of dust particle size on explosibility data is illustrated for coal and aluminum dusts. For both dusts, the finest sizes were the most hazardous. The inerting requirements for preventing explosions were also measured in both laboratory and large-scale systems. All the data show relatively good agreement between the laboratory and the large-scale tests.
Keywords
Combustion; Combustible dusts; Dusts; Mineral dusts
CODEN
POPPDE
Publication Date
19921001
Document Type
Journal Article
Fiscal Year
1993
NTIS Accession No.
NTIS Price
Identifying No.
OP 22-93
Issue of Publication
4
ISSN
0278-4513
NIOSH Division
PRC
Source Name
Plant/Operations Progress
State
PA; MO
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