One of my shop teachers back in high school said he used to work in a recycling plant and the biggest boogie men of the industry was having an unopened can of soda hitting a smelter at max temp. He told us the resulting explosion would be enough to take out the entire recycling facility. Is this even possible?
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I don’t know about taking out a whole facility, but I bet it could clear a room. An unopened can of soda would boil instantly when it hit the heat, causing the sealed can to fill with superheated water far above its boiling temperature. As soon as the can inevitably fails, all that water boils and expands rapidly into steam. The can fragments like a grenade while the steam escapes, burning anything it touches on the way out.
Others have pointed out the steam expansion issue.
The other problem is that the can will be mixed in with the rest of the material, so there will be liquid metal on top of the rapidly expanding steam.
This actually happened in the materials lab at my school. It wasn’t much but some of the aluminum they used had some trapped moisture. My TA was assisting (they didn’t feed the furnace with students in the building) and he said the aluminum hit the ceiling and splashed back down. The epoxy floor had small craters in it.
This was a small furnace and a few drops so no one got hurt, but I assume that someone needed a change of pants.
As part of the safety session before the casting labs we watched footage of actual industrial furnace explosions.
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