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Improved 6.8-L furnace for measuring the autoignition temperatures of dust clouds.

Authors
Conti-RS; Cashdollar-KL; Thomas-RA
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9467, 1993 Jan; :1-26
Link
NIOSHTIC No.
10012108
Abstract
A new U.S. Bureau of Mines 6.8-L ignitability furnace was used to study the thermal autoignitability of dust clouds. The furnace has a quartz window to allow observation of the early stages of the ignition process and to allow measurement of the dust explosion temperature. Thermal ignitability data were obtained for various carbonaceous and metal dust clouds, with particular emphasis on various ranks of coal dusts. One of the reasons for the construction of the new 6.8-L furnace was to evaluate the effect of chamber volume on the measured autoignition temperatures. Therefore, data from the 6.8-L furnace were compared with data measured earlier in a 1.2-L furnace. The conclusion is that the autoignition temperatures measured in the 6.8-L furnace were only slightly lower on average than those from the 1.2-L furnace. These data on the minimum autoignition temperatures of various materials will be useful in analyzing the thermal ignition hazards of dust clouds in the mining industry and other industries that manufacture, process, or use combustible dusts.
Keywords
Ignition-temperature; Tests; Furnaces; Dust-explosions; Mine-safety; Combustion-chambers; Coal-dust; Autoignition
Publication Date
19930101
Document Type
Report of Investigations
Fiscal Year
1993
NTIS Accession No.
PB93-215697
NTIS Price
A03
Identifying No.
RI-9467
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9467
State
PA
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