[TheForge] Ceramic chip forge

[Jerry Frost]

Natural gas is used in naturally aspirated burners all the time but as noted
the low domestic delivery pressure makes for very back pressure sensitive
burners. Heck, you can choke a gas range burner by covering part of it with
a piece of toilet tissue, it can't blow through it nor lift it.

I've been thinking about trying a chip forge using a naturally aspirated
burner and while I'm pretty sure it can be done it may be a situation where
a gun burner's insensitivity to back pressure makes it a hands down
favorite. Still, an inducer can produce robust output pressure with a
smaller jet diameter and higher gas pressure. It's certainly worth a little
tinkering.

My next questions for those who already own one of these wondrous forges
are:

What kind of grate separates the burner nozzle from the chips?

What is the burner nozzle made from?

Is the firepot lined? If yes: With what?

Perhaps I can even entice Rich into removing the chips from his forge and
snapping a couple pics of it's innards. Heck, maybe even scan and post some
drawings of it's workings. <grin>

Frosty
------------------------
If it ain't forged
it ain't real.
Wrought iron is.
The FrostWorks

Meadow Lakes, AK.


----- Original Message -----
From: "Bruce Freeman" <FREEMAB at pt.fdah.com>
To: <theforge at mailman.qth.net>
Sent: Tuesday, September 14, 2004 5:21 AM
Subject: RE: [TheForge] Ceramic chip forge


> I contend that a properly constructed aspirated-air burner would work as
> well as an blown-air burner.
>
> Blown air is used with natural gas from the mains because that gas is
> only available at low pressure.
>
> ( Even so, I expect that a properly constructed aspirated-air burner
> could be made to run from it, but that may be more than garage-shop
> technology. Anyone interested in doing this would do well to review
> Frosty's contributions from the archives.  I expect a simple orifice
> wouldn't do, and a needle would be needed as the orifice.  Likewise I
> expect that rough pipe fittings wouldn't do, and a true venturi would
> have to be build or scavenged - perhaps from a furnace.  These are
> untested speculations.)
>
> Bruce
> NJ
>
>