Gallery, Projects and General > Neat Stuff

ALU melting

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dawesy:
Anyone who tries something just because 'they saw it in a YouTube video' without checking on the dangers involved for themselves deserves all they get imo.
Also the part of 'cans with liquid still in them ' would this not just evap off before the can melted? Cans are hard to completely empty after all.

vtsteam:
I don't have a problem with the furnace body itself actually, I doubt it will knock over easily. And I don't usually do a lot of freestyle kicking around a firing furnace. But I do have a problem with the inhalation of fluorine degradation products by kids watching this video. That can be a one time mistake. Take out the non-stick muffin tin recommendation in the movie, period. Warnings aren't sufficient.

Yeah, I kind of cringed when seeing Simon's routing of the pulley photo -- but as I said before, it's one thing to show what you've done, as opposed to telling others how to do things. We all take personal risks, commensurate, hopefully, with our skill level.

I don't know anyone who cuts wood on a bandsaw that uses metal gauntlets, either.

Manxmodder:

--- Quote from: dawesy on February 15, 2015, 09:06:15 AM ---Anyone who tries something just because 'they saw it in a YouTube video' without checking on the dangers involved for themselves deserves all they get imo.
Also the part of 'cans with liquid still in them ' would this not just evap off before the can melted? Cans are hard to completely empty after all.

--- End quote ---

Also the part of 'cans with liquid still in them ' would this not just evap off before the can melted? Cans are hard to completely empty after all.

Yes it may evaporate off if left on the surface,but if you push the water containing can beneath the surface of the molten metal the water turns to flash steam with an expansion rate approximately 1600 times liquid volume (1cc of water becomes 1600cc of explosively expanded vapour)

If this process occurs beneath the molten metal surface the outcome isn't going to be good,this is how many serious foundry explosions occur......OZ.

Just an edit for addition here:
 About 15 years ago a mate of mine had a furnace setup to melt a plentiful source of scrap pistons,for many melts he had never had any problems until one day he was melting a batch which had been laying outside. Some of the pistons still had rings fitted which were seized in the grooves,but little known to him water was trapped behind them.
One such piston was added to the molten metal and pushed beneath the surface with tongs causing the trapped water to flash steam and eject a quantity of liquid ally into the air. Fortunately nobody was injured,but safety lessons were certainly learned that day.

vtsteam:
Preheating in the foundry exhaust is a simple way of not only eliminating the possibility of moisture from scrap stock, but in reducing melt time. I'm speaking of massive stock, like pistons, not soda cans.

DavidA:


....I don't know anyone who cuts wood on a bandsaw that uses metal gauntlets, either....

This is a very dangerous thing to do. Ok with a band knife but never with any blade that has teeth that can grab a chain mail glove.

At the chicken factory I worked years back an operative lost part of his hand when he pushed some meat into s pair of serrated rollers while wearing such a glove.He shouldn't have been able to do it, but he over rode the safety on the gate that would have prevented his hand getting near the rollers.

Dave.

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