[TheForge] gas forge design

Mon Apr 21 00:56:01 2003

This idea of burning waste oil is somthing I've been thinking of for some
time.  I know a guy who drills  water wells and he has some sort of forge
to  he uses to sharpen his bits, he burns crude oil, he says nothing heats
like crude oil.  I guess the forge is a fire brick box with a blower on one
end, the fuel drips into the air stream, and the bits are stuck in the other
end, I never seen it but this is how he explained it to me.
Randy Mundt
----- Original Message -----
From: "Paul Hewitt" <[email protected]>
To: <[email protected]>
Sent: Sunday, April 20, 2003 11:19 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
>
>
> ----- Original Message -----
> From: "Jerry Frost" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, April 20, 2003 10:12 AM
> Subject: Re: [TheForge] gas forge design
>
>
> > Hi Sheldon:
> >
> > The shape of the forge is less important than the volume to burner
ratio,
> > with one cateat: that there are no crannies the flame can't reach and
make
> > cold spots.
> >
> > There are a number of forge shapes and when you get down to the nitty
> gritty
> > they all work fine.
> >
> > In high school we had a very hot square box, oil fired four burner
forge.
> It
> > had two burners on each side of the door, two high and two low, making a
> > horizontal vortex. If you needed a general heat you propped the stock
off
> > the forge floor in the center of the vortex. If you needed a more
> localized
> > heat you placed that part directly i the burner's path on the forge
floor.
> > You didn't have as much control of the heat as with a coal forge of
course
> > but it was pretty flexible.
> >
> > Most commercial gas forges are rectangular with the burners aimed
straight
> > down and they work fine.
> >
> > Folk place the burners in cylindrical forges in several different
> > configurations. The two basics are: One, Directly opposing and two,
> > tangential.
> >
> > The directly opposing configuration usually has the burners mounted at
or
> > near the top, aiming straight at the opposite side of the forge.
> >
> > Tangential mounted burners can be found mounted all over the place.
> They're
> > usually high, aimed at the far top side of the forge but some are on top
> > aimed down one side and some are mounted on the bottom aimed across the
> > forge floor.
> >
> > All in all, I don't believe the shape of the forge makes much difference
> as
> > long as there are no flame shadows and there is enough burner for the
> > volume.
> >
> > Regardless I'm still experimenting. <grin>
> >
> > Having enough exhaust porting does make a real difference with naturally
> > aspirated burners and with cylindrical forges it's common to block off
the
> > ends with fire brick, leaving enough gaps so the burner burns freely.
> >
> > Frosty
> > ------------------------
> > If it ain't forged
> > it ain't real.
> > Wrought iron is.
> > The FrostWorks
> >
> > Meadow Lakes, AK.
> >
> >
> > ----- Original Message -----
> > From: "Sheldon Laing" <[email protected]>
> > To: <[email protected]>
> > Sent: Sunday, April 20, 2003 5:17 AM
> > Subject: [TheForge] gas forge design
> >
> >
> > > I have been working with a coal forge for a while now and I have been
> > > considering building a gas forge since last year and I have finally
> > > decided to do it. I am well acquainted with Ron Reil's excellent site
> > > and I have chosen to use a side arm burner type. I still however have
a
> > > few questions regarding the forge shape and design.
> > >
> > > 1. Will the forge perform a lot better if it is a cylinder? I want to
> > > use a semicircular forge (cut in half cylinder) with a flat base on
> > > which to rest the steel, will this make it less powerful (i.e. will it
> > > not refract the heat to a lesser extent than a cylinder? If so, will
it
> > > be a big enough difference that I should change to a cylinder.)
> > >
> > > 2. What sort of exhaust area should I leave? Should I leave the one
side
> > > of the "cylinder" open or would it be okay to close it up (NOT
airtight
> > > of course).
> > >
> > > 3. If you have any tips or other advice gained from building your own
> > > gas forges please let me know.
> > >
> > > Thanx in advance for the help.
> > >
> > > Sheldon Laing
> > > Hephaestus Forge
> > > Cape Town
> > > South Africa
> > > [email protected]
> > >
> > >
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