Improved 6. 8-L furnace for measuring the autoignition temperatures of dust clouds

Book · Fri Jan 01 04:00:00 EST 1993

OSTI ID:6124262

Conti, R S; Cashdollar, K L; Thomas, R A

A new US Bureau of Mines 6.8-L ignitability furnace was used to study the thermal autoignitability of dust clouds. This 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.

• OSTI ID: 6124262
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012033* -- Coal
Lignite
& Peat-- Underground Mining-- Mine Environment-- (1987-)
440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ACCURACY
COAL MINING
COMBUSTION PROPERTIES
DUSTS
EQUIPMENT
FIRE HAZARDS
FLAMMABILITY
FURNACES
HAZARDS
IGNITION
LABORATORY EQUIPMENT
MINING
NATIONAL ORGANIZATIONS
PERFORMANCE
RESEARCH PROGRAMS
UNDERGROUND MINING
US BUREAU OF MINES
US DOI
US ORGANIZATIONS