Limits of flame propagation of coal dust--methane--air mixtures

Technical Report · Sun Mar 31 23:00:00 EST 1968

OSTI ID:7209371

Singer, J M; Bruszak, A E; Grumer, J

Flame propagation of lower limit hybrid coal dust-methane-air mixtures in vertical and horizontal flame ducts of 15.2 cm id and 1.8 m length has been investigated to provide information bearing on safety in mines. Fuel concentrations at lower limits of flame propagation and equivalences of coal dust and methane are much higher for continuing flame propagation than for short-span flame propagation in the vicinity of an ''overdriving'' ignition source. As the energy of the ignition source was increased, the flame speed and the distance of flame propagation from the ignition source increased, whereas the total fuel concentration at the lower limit decreased.

• Research Organization: Bureau of Mines, Washington, D.C. (USA)
• OSTI ID: 7209371
• Report Number(s): BM-RI-7103
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
016000 -- Coal
Lignite
& Peat-- Health & Safety
090110 -- Hydrocarbon Fuels-- Properties-- (1979-1989)
10 SYNTHETIC FUELS
ALKANES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
CRYOGENIC FLUIDS
DUSTS
ENERGY SOURCES
FLAME PROPAGATION
FLUIDS
FOSSIL FUELS
FUELS
HYDROCARBONS
METHANE
ORGANIC COMPOUNDS
OXIDATION
PRODUCTION
SAFETY