Steel mills have a thing they call a furnace reaction. This is in the winter win a piece of ice gets trapped in the scrap steel they put in the furnace. If the liquid steel touches it a steam explosion results. I have been on the melt shop floor when a bale of steel containing an entire car was blown 100 feet out of the furnace. At one Atmosphere 1 gallon of water produces 1800 gallons of steam.
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