OSHA Accident Investigation · Summary #999789
INADEQUATE MAINT,CLOGGED,EXPLOSION,COMBUSTIBLE DUST,GRAIN DUST
Event description
No employees injured in grain dust explosion
Investigation abstract
On January 14, 1988, two employees were near a feed house making general equipme id by the magnets into the hammers, resulting in sparks that landed in grain dus t. The 20-hp, 4000-cfm fan blower spread the sparks and dust through a 12-inch-d iameter pipe and into the Carter Day dust collector. The ideal air concentration to support a grain dust explosion was present, combined with sparks and dust. A second explosion was supported and ignited by the first explosion when excess g rain collected in the dust collector. The tremendous heat caused rapid expansion that blew the wall and ceiling panels outward. nt checks. A Carter Day dust collector, which was attached to a Champion 125-hp hammer mill, blew its explosion door outward, forcing ignited grain dust into th e grain leg. The ignited grain dust continued up and out into the grain storage bins through a drag auger, causing the steel bin tops to blow off. The metal roo f and side walls blew out. The two employees heard a small explosion before a ba ll of flames shot toward the ceiling, fueled by a second explosion. However, no employees were injured. Subsequent inspection of the tramp metal magnets found t hem to be clogged with excess metal contaminants. It appears that tramp metal sl
Victim
-
#981 Degree 0 Age 0
- Nature of injury
- 0
- Part of body
- 0
- Event type
- 0
- Source
- 0
- Occupation code
- 0
- Human factor
- 0
- Environmental factor
- 0
- Task assigned
- 0
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