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Hi Michael,
I was at a model shop that machined a lot of magnesium over the years. Yes, the dust can be flammable but not from any of the processes you outlined. We only worried during 'lights out' runs. That being said, all our programs were proofed multiple times and machines cleaned out EVERY night before running. Roughing parts only happened during the day with someone in attendance. A broken tool scraping the magnesium at high rpm will ignite the chips, but not the block itself.
The magnesium needs a surprising amount of heat to ignite. It certainly won't be an issue to sand or media blast. If you're only doing finish work and not machine generated operations I can't ever see enough heat to cause any issues.
Be clean in your environment and wipe your shavings off with a brush. Don't vacuum as the dust can get inside moving components. Hand clean at the end of making a mess. Use common sense but I wouldn't be scared of the material.
Best,
Ben |
