D2 writes:
<<Hmm, but the baled wool isn't wet, so heat isn't being produced by wet
wool that is drying. Oh. Wait. I suppose the wool can get wet, if it
sweats. I wonder how much that would contribute to a wool fire?>>
Baled wool will be wet if the wool is wet before shearing, and is
somewhat damp anyway, just because of being right off the sheep. Not to
mention its famous ability to absorb moisture from the air.
Spontaneous combustion is caused when bacteria start to grow, and
release heat, in the wool. This happens faster when the wool is
somewhat damp, and if it's bagged in such a way that the moisture can't
escape before bacteria start to grow, which is one of the reasons why
plastic bags aren't recommended for anything but very short term storage
for raw wool.
Holly
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