Re: [CAD_CAM_EDM_DRO] Dirty EDM water

Dave,
Ive used lotsa water based edm drills, and the waste product(s) are not
harmful in
any study I've read. When Makino (?) had thier super-edm-mill there were
some nasty-ish
side products like xenon/argon but that was due to adding glycols/sugars to
the water.
The street story sez the FDA stopped it as an 'illegal use of a food
product'.
But you might contact some big manufacturer and ask for thier disposal
guidelines,
they wont tell you it's dangerous of course, but they may let out what the
gov'mt sez.
The ferrous parts can be grabbed with 'cow magnets' (cool thingys you shove
into
a cow to collect the nails and garbage they eat in the field, buy at
FarmN'Fleet ).
The ferrous stuff is cool under a scope, they're tiny hollow balls, like egg
shells with
a hole, cuz they're the frozen platelet of steel cooled suddenly in the
water.
There may well be some hydrogen gas realeased in the destruction of the
water, but
I've never seen a flicker with a water hole driller, and have seen flames
with oil sinkers.
regards, tomp

----- Original Message -----
From: turbulatordude <davemucha@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, August 18, 2003 11:56 AM
Subject: [CAD_CAM_EDM_DRO] Dirty EDM water


I am currently playing with my new toy, an RC EDM machine.

I have a question about the waste water. After being run thru the EDM
process, it gets 'contaminated'.

Since the only components are the water and what is in it, the
electrode and the part, is the water industrial waste ? or just dirty
water with lots of copper and steel ? (carbide, cobalt.???)

It seems that that the tiny bits are colloidal or fall out as
sediment.

Since I have well water, dumping anything down the sink has the
potential of coming back next month or next year.

Am I worried about nothing or starting a new `Love Canal'?

http://www.epa.gov/region02/superfund/npl/0201290c.htm

It seems I could evaporate the water and trash the solids. Putting
it thru a paper coffee filter took out most of the solids. I haven't
looking into something that would precipitate the solids or some
other means of cleaning the water.

So, the questions are.
Is this a problem ?
If so, what can be done about it ?

Dave
(btw, I posted this to the EDM-CNC list while waiting for permission
to post here. I thought it might be too far off topic)







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