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Posted By CHRISTOPHER HAYWARD
Anyone got any practical experience of, or theories relating to, explosions or fires resulting from shot blasting metal components, especially steel and aluminium, in a factory environment?
I would have thought the key issues are particle size, concentration and minimum energy required. Any of which might require specialist investigation.
Anyway, over to you guys.
Regards
Chris
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Posted By Karen Todd
Hi Chris,
Sorry I can't detail the theory, but I do recall people having to keep steel grinding and aluminium grinding separate.
In a factory I used to work in there were separate dress-weld booths (for grinding the welds smooth) for aluminium and steel. There were large signs up in the steel ones saying that aluminium must not be ground in them and vice versa. And yes, there were occasionally fires in the dressweld booths, which happened when someone ground something in the wrong booth...
Karen
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Posted By Martin Hartland
Hi Chris
Another key issue you should consider is confinement as dust explosions tend to most often occur inside process plant.
You'll probably need some expert help to determine the explosivity (if thats the right word) of the dusts you're generating. If i remember a device called the Hartmann explosivity tester is used for this.
Most organic materials in powder or dust form, including metals are capable of generating dust explosions. Aluminium dust explosions can be particularly violent, i have a video clip that demonstrates this very well.
Regards
Martin Hartland
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Posted By jom
Chris,
The activities of the US Chemical Safety Board might be of interest to you.
US industry has experienced several serious dust explosions in recent years. The CSB is currently focussing on this issue. I believe they are conducting a public inquirie into the matter.
I would expect that somewhere they discuss the science of dust explosions.
Their site is:-
http://www.csb.gov/
The first item is about dust explosions.
Cheers,
J.
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