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Too much grain dust.

A spark in grain dust will create a 'flash'. There by an explosion.

In coal mines, miners referred to 'fire damp' . This is a mixture of very fine coal dust particles, methane and oxygen. A spark across it would cause a big explosion.

Miners tested for 'fire damp' using canaries (birds). Canaries are very sensative to atmospheric changes. In a coal mine if 'fire damp' is prersent the canary would possibly faint and fall off its perch, until restored to clean oxygen(air).

Have you ever seen the 'custard tin' explosion. The very fine particles of custard powder, could be ignited and blow the lid off the tin.

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lenpollock

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∙ 2y ago
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