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Methane Ignition by Frictional Impact Between Aluminum Alloys and Rusted Steel.

PB240838

Publication Date	1975
Personal Author	Desy, D. H.; Neumeier, L. A.; Risbeck, J. S.
Page Count	36
Abstract	Research was conducted on ignition of methane by frictional sparks from aluminum alloys impacting rusty steel at typical coal mine fan speeds. Objectives were to establish incendivity of different commercial and experimental aluminum alloys and to evaluate several substitute materials for the aluminum-steel combination. All aluminum alloys produced some ignitions in a specially designed impact apparatus. Harder experimental alloys and those containing silicon tended to be more incendive than others. With normal experimental conditions, steels, brass, and plastic did not ignite methane-air when impacted on rusty steel. Constructional steel at high speed in oxygen-enriched atmosphere caused some ignitions. It is suggested that materials other than the aluminum-steel combination would minimize the hazard.
Keywords	Aluminum alloys Steels Electric sparks Spark ignition Underground explosions Impact Methane Iron oxides Coal mines
Source Agency	Bureau of Mines
NTIS Subject Category	94H - Industrial Safety Engineering 81A - Combustion & Ignition 48A - Mineral Industries
Corporate Authors	Bureau of Mines, Rolla, MO. Rolla Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197512

Methane Ignition by Frictional Impact Between Aluminum Alloys and Rusted Steel.

Methane Ignition by Frictional Impact Between Aluminum Alloys and Rusted Steel.
PB240838

Publication Date	1975
Personal Author	Desy, D. H.; Neumeier, L. A.; Risbeck, J. S.
Page Count	36
Abstract	Research was conducted on ignition of methane by frictional sparks from aluminum alloys impacting rusty steel at typical coal mine fan speeds. Objectives were to establish incendivity of different commercial and experimental aluminum alloys and to evaluate several substitute materials for the aluminum-steel combination. All aluminum alloys produced some ignitions in a specially designed impact apparatus. Harder experimental alloys and those containing silicon tended to be more incendive than others. With normal experimental conditions, steels, brass, and plastic did not ignite methane-air when impacted on rusty steel. Constructional steel at high speed in oxygen-enriched atmosphere caused some ignitions. It is suggested that materials other than the aluminum-steel combination would minimize the hazard.
Keywords	Aluminum alloys Steels Electric sparks Spark ignition Underground explosions Impact Methane Iron oxides Coal mines
Source Agency	Bureau of Mines
NTIS Subject Category	94H - Industrial Safety Engineering 81A - Combustion & Ignition 48A - Mineral Industries
Corporate Authors	Bureau of Mines, Rolla, MO. Rolla Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197512