Improved 6. 8-L furnace for measuring the autoignition temperatures of dust clouds. Report of investigations/1993
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.
- Research Organization:
- Bureau of Mines, Pittsburgh, PA (United States). Pittsburgh Research Center
- OSTI ID:
- 6181880
- Report Number(s):
- PB-93-215697/XAB; BUMINES-RI--9467
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
012033* -- Coal
Lignite
& Peat-- Underground Mining-- Mine Environment-- (1987-)
016000 -- Coal
Lignite
& Peat-- Health & Safety
CARBONACEOUS MATERIALS
COAL
COAL MINES
COMBUSTION CHAMBERS
DATA
DUSTS
ENERGY SOURCES
EXPLOSIONS
FOSSIL FUELS
FUELS
FURNACES
HAZARDS
IGNITION
INFORMATION
MATERIALS
MINERALS
MINES
MINING
NUMERICAL DATA
OXIDE MINERALS
QUARTZ
RESEARCH PROGRAMS
SAFETY
STATISTICAL DATA
TEMPERATURE DEPENDENCE
UNDERGROUND FACILITIES