[Jewelry making - Article 00573] - Re: [Orchid] Dust and static electricity explosions

[James Binnion]

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>     in order for there to be an explosion, the dust must be flammable.
>     The typical dust in a polisher is non-flammable - it's basically
>     dirt. 

    Sorry John, but it doesn't have to be flammable just react with
    oxygen. Metals dusts cement powder and other "non flammable" powders
    can explode but flammable ones are easier to ignite. That said the
    likelihood of an explosion in a polishing machine is remote because
    the dust is not dispersed in the air but sucked onto the filter
    surfaces. A fire however is definitely a real possibility this is
    why you should never grind ferrous metal in polishing motor with a
    dust collector that is used for buffing as the cloth fibers and
    grease from the polishing compound bars in the filter will burn with
    a vengeance if the spark manages to ignite them while the fan is on 

James Binnion
jbin AT mokume-gane.com
James Binnion Metal Arts
http://www.mokume-gane.com
360-756-6550
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