Depends on its structure and how pure it is.  Very finely powdered 
magnesium with lots of air will go very quickly.  Large ingots burn slowly.

I'd be interested in seeing the 'after' pictures.  The stuff burns so 
hot I'm interested in what's happening to the concrete and ground below it.

Takes a lot of energy to start a magnesium fire - wonder how this one 
happened.

-Adam

Dave VanHorn wrote:

>
> Anyone know how long 5000 pounds of magnesium scrap will burn for?
>
> http://www.indystar.com/articles/8/209401-5958-093.html
>
>
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