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Improved 6.8-L Furnace for Measuring the Autoignition Temperatures of Dust Clouds.

PB93215697

Publication Date	1993
Personal Author	Conti, R. S.; Cashdollar, K. L.; Thomas, R. A.
Page Count	33
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	Coal dust Autoignition Ignition temperature Tests Furnaces Dust explosions Mine safety Combustion chambers
Source Agency	Bureau of Mines
NTIS Subject Category	81A - Combustion & Ignition 97K - Fuels 48A - Mineral Industries
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes	Library of Congress catalog card no. 92-35375.
Document Type	Technical Report
Title Note	Rept. of investigations/1993.
NTIS Issue Number	199320

Improved 6.8-L Furnace for Measuring the Autoignition Temperatures of Dust Clouds.

Improved 6.8-L Furnace for Measuring the Autoignition Temperatures of Dust Clouds.
PB93215697

Publication Date	1993
Personal Author	Conti, R. S.; Cashdollar, K. L.; Thomas, R. A.
Page Count	33
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	Coal dust Autoignition Ignition temperature Tests Furnaces Dust explosions Mine safety Combustion chambers
Source Agency	Bureau of Mines
NTIS Subject Category	81A - Combustion & Ignition 97K - Fuels 48A - Mineral Industries
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes	Library of Congress catalog card no. 92-35375.
Document Type	Technical Report
Title Note	Rept. of investigations/1993.
NTIS Issue Number	199320