[TheForge] gas forge design

Sun Apr 20 15:45:00 2003

I'll bite onthe contaminates, waste oil can have all kinds of good stuff
including benzene etc, most glycols etc, when burned over about 900 degree's
are a mute point.  Many of the synthetic oils could be a serious problem,
they are made from alcohols, and various acids.  One of the drawbacks i have
alwasy thought of is the fact that some of the synthetics can create
Hydrofluoric Acid, which is pretty nasty stuff, I am familiar with the
material from building equipment for companies like Intel, HP, Triquint
Mitsubishi etc.  They use it in several of their silicon wafer etching
process's.  The EPA does not regulate waste oil heaters because it is a
method of disposal of a more or less obnoxious waste.  I bought several
casting furnaces from a guy a few years back that used #2 fuel oil, and
waste oil burners.  They tended to produce obnoxious vapor which had to be
hood vented, and allot of left over carbon and residual hydrocarbon chains
that formed  more or less a tar like mass similar to creosote. on any hoods
and venting.  As for metal contamination most of that can be filtered but I
have seen the inside of waste oil burning scrubbing towers, and the "dust"
of metal remains and heavy carbon conglomerates is pretty ugly.

Thanks for the answer, I obviously have time to come up with stupid
questions!

The purpose of any waste oil furnace I think would be more for heating that
welding.  I know I am missing out onthe real thing but I have never forge
welded a piece in my life, as a matter of fact I have not even tried.  I
probably forge more silicon bronze, and stainless steel than anything else.
I am not sure those can be forge welded.  Silicon bronze is a real fine line
between hot and melted, and working it to cold results in crumbling.  Most
of the stainless I forge is made into things like Crab Block and long line
peelers, and various pieces for fishing fleet boats.

The idea though is stainless takes allot of heat...........

----- Original Message -----
From: "Jerry Frost" <[email protected]>
To: <[email protected]>
Sent: Sunday, April 20, 2003 12:20 PM
Subject: Re: [TheForge] gas forge design

> Yes fuel oil, though being more than 30 years ago I don't remember
> specifics. Also, even though it'd melt your work in short order I don't
> remember even the instructor getting a weld out of it. I think it was the
> sulphur or other contaminants. Fuel oil isn't like coal, charcoal, propane
> or natural gas, it has all kinds of "other" things in it. Coal, charcoal,
> prop, etc. are clean:  charcoal is relatively pure carbon as is coal once
> coked and prop, nat gas, etc. are relatively pure combinatins of hydrogen
> and carbon.
>
> Waste oil burning forges come up every now and then, it's a logical thing
to
> think of. Unfortunately it's not a good thing to try, here's why.
>
> It's waste oil because of a couple things but the thing we're concerned
with
> is contamination. Waste oil is loaded with all kinds of metal from
whatever
> engine, gearbox, etc. it came out of. Also, there may be other
contaminants,
> especially if it's from an engine, combustion byproducts blowing by the
> rings and maybe some anti-freeze, etc.  So, not only would it contaminate
> and possibly poison the work (say a weld) you'd be breathing the vaporized
> metals and . . . ?.
>
> Waste oil heaters are much more complicated and expensive than fuel oil
> heaters. They not only have to contend with different weights of oil, they
> have to do a good job of scrubbing contaminants from the exhaust.
>
> Like I say, it's a logical thought but in light of the hazards I don't
know
> of anybody who's tried it. I'm not.
>
> Frosty
> ------------------------
> If it ain't forged
> it ain't real.
> Wrought iron is.
> The FrostWorks
>
> Meadow Lakes, AK.
>
>
> ----- Original Message -----
> From: "Paul Hewitt" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, April 20, 2003 9:19 AM
> Subject: Re: [TheForge] gas forge design
>
>
> > Ok I like this thread, now I have some questions.
> >
> > Oil fired forge?  I am assuming like #2 Fuel oil, or equivalent.
> >
> > I am interested if anyone has some thoughts on a waste oil fired forge.
I
> > am about to build one as an experiment, has anyone else done such a
thing?
> > In the past i built a transmission fluid fired furnace for a glass
> crucible.
> > Transmission fluid was used because it burns very clean.  Would the
extra
> > carbon from waste oil burn hurt the forge or the pieces being worked.  I
> am
> > going to assume not because we use coal forges...  What better place for
> > carbon soot than coal.
> >
> > I would appreciate and comments anyone might have.
> >
> > Thanks
> >
> > Paul Hewitt
> >
> >
>
>
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