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Author: Subject: Magnesium Powder?
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[*] posted on 1-1-2017 at 16:06
Magnesium Powder?

Hello, just asking for advice pertaining to the two, 30g magnesium firestarter bars and how to get them into powder/shavings easily. I was using a knife to make shavings but that was exhausting so I switched to my dremmel to grind away the bar into powder, but that was taking forever! I decided to make a special knife to make shavings and it works well, but I think it would still take over an hour to get at least 1 gram of shavings.

What are your experiences with this problem?

Note: I have magnesium ribbon, but I am running out and these bars were fairly cheap on Amazon.
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[*] posted on 1-1-2017 at 19:24

You can use a drill to drill holes into the magnesium block to produce coarse turnings.
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[*] posted on 1-1-2017 at 19:34

As has 50g magnesium turnings for £3.5, 200g for £8 (inc. p&p) I would not bother with the effort :D
Mg is not that expensive as reagents go.

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[*] posted on 2-1-2017 at 18:49

Before there was spherical/spheroidal "blown" Mg powders, "cut" Mg powder for pyrotechnic use was sometimes made by running bars of Mg against steel wire wheels similar to those now used by welders and others for stripping paint from steel and cleaning welds.

Mg powder is a pain to make mechanically by drilling/sawing, etc.

Long ago I got a chunk of Mg plate from a scrap yard and wore out several SawzAll blades to get a very coarse saw chip Mg powder. Would not do this again, far too much work and cost for a little material.

If you are in USA, Skylighter can sell (and ship) a mixed Mg powder that contains scrap material from industrial Mg machining proceses.

[Edited on 3-1-2017 by Bert]

The explosion removed the windows, the door and most of the chimney.
It was the sort of thing you expected in the Street of alchemists. The neighbors preferred explosions, which were at least identifiable and soon over. They were better than the smells, which crept up on you.
-Terry Pratchett, "Moving Pictures"

It is essential that persons having explosive 
substances under their charge should never 
lose sight of the conviction that, preventive 
measures should always be prescribed 
on the hypothesis of an explosion.

Marcellin Berthelot - 1892 Explosives and their power - Page 47
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