Aluminum granules + iron oxide granules + heat = Thermite!
Maybe an unlikely outcome but one I will now have in the back of my mind every time I use our bench grinder at work. I am a mechanic and we have one grinder for everything that needs to be ground.
> It's funny I have been working in machine shops all my life and did not
> no that grinding aluminum on a grinder could cause it to blow up. I just
> thought you didn't do it because it clogged up the wheel, Never too old
> to learn something. It sure makes sense that somebody could get hurt
> that way.