[TheForge] recuperative wall forge, etc.

[Michael]

Frosty,
I will try to work up a sketch this weekend. 
Mikey

-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Jerry Frost
Sent: Thursday, July 27, 2006 9:22 PM
To: Sponsored by ABANA
Subject: [TheForge] recuperative wall forge, etc.

I see the problem now.

You think I want a working sketch of what you want to 
build.

Not so buffalo. Oh sure I'd be interested in working 
sketches, dimensioned drawings, blue prints as such but 
I wouldn't follow them.

No, I'm more interested in the CONCEPT sketches. I 
mean, round, square, rectangular, triangular, etc. 
doesn't mean that much, we're not talking about 
vortices here just a simple matter of recirculating a 
portion of the exhaust gasses through a double liner.

Your verbal isn't helping. For instance,

> By the way, the circular fire chamber would
> also allow heated gases to be drawn into the fire 
> chamber through a hole
> placed next to the burner, which would allow the 
> burner nozzle to be made of
> refractory--

Man, you have SOOOO lost me. Are you talking about 
using the gap to preheat the combustion mix? If so 
we're paddling totally different pages.

A concept sketch Mikey, just the concept. I'll swap ya.

<grin>

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

Meadow Lakes, AK.

http://www.artmetalradio.com/

From: "Michael" <michael.a.porter at comcast.net>


> Frosty,
> The problem with shooting you a sketch is that I'm 
> presently torn between
> greed and elegance. That is to say elegance in the 
> engineering sense
> (simplicity). What the dilemma boils down to is that 
> some part of me--the
> greedy part--wants to build an impossibly large 
> rectangular ceramic chip
> brazing hearth; it's kind of a bragging rights thing 
> :-)
>
> The sensible part knows very well that a much smaller 
> circular design is far
> more practical--meaning it's the version 99.99% of 
> metal smiths would use
> and be happy living with; you know, the "what's this 
> beast doing eating my
> garage" factor. The dilemma is caused by the fact 
> that both Jeckle and Hide
> design side by side within Dr. F's brain; the 
> infighting has been ferocious.
>
> Sanity is slowly gaining the upper hand, and the 
> circular firepot made with
> a mullite sagger, placed outside of a high-heat 
> castable (4000 F +)
> refractory inner wall is slowly emerging (of course 
> the sagger could be used
> for the inner wall and considered an easily replaced 
> consumable for portable
> versions). Naturally this design would allow the 
> continued use of Mikey
> burners, for the intense heat swirling in the fire 
> chamber below would have
> room to dissipate into the  chamber's greater area 
> before encountering the
> supporting grill and ceramic media above it (or the 
> crucible when the media
> and grill are replaced for casting mode >:-) This 
> design should also prove
> very satisfactory with your own exhaust gas 
> recirculation preferences. Of
> course, all of this brings up more than a little 
> guilt over the idea's not
> sufficiently emerging last year, possibly preventing 
> the melting of the
> other Michael's grill and ceramic media...
>
> The bats in the belfry are quite disturbed at castle 
> Frankenburner lately
> (OK, more disturbed than usual). By the way, the 
> circular fire chamber would
> also allow heated gases to be drawn into the fire 
> chamber through a hole
> placed next to the burner, which would allow the 
> burner nozzle to be made of
> refractory--for the hole could be subject to a 
> movable choke--permitting the
> burner's position to be unmoving. With variable 
> chokes into and out of the
> plenum chamber, optimum performance would only be a 
> question of tuning. Best
> of all, their tuning can be completely separated from 
> that of the burner.
> Such a chamber can also successfully employ low cost 
> safety devices, for
> they can enter far enough from the flame not to be 
> adversely affected by its
> too-high velocity, but still close enough to 
> re-ignite it efficiently (not
> that I believe in this kind of safety; constant 
> vigilance is the preferred
> safety device in my view).
>
> There are still "problems" to be ironed out, not 
> least of which is that a
> ceramic burner flings the door wide open to 
> convenient multiple fuel use,
> thus working the oil-burner fans into a lather all 
> over again (sigh). I
> suppose it was inevitable...
>
> Before you multiple fuel burner fans even ask:
>
> Method One:
> Use an SS capillary tube from smallparts.com (they 
> even have the perfect SS
> fitting available for sixteen bucks). Beside the SS 
> capillary tube, run the
> tube for oil injection. Thus we find that 
> retrofitting tube burners of
> various types (even old Aussi burners) for multiple 
> fuel use hardly
> constitutes a challenge.
>
> Method Two:
> Employ lathe turned end caps (locked into the 
> burner's end with a
> thumbscrew) for quick change between fuel gas 
> accelerators and oil
> injectors.
>
> Worst of all: This design can be rotated between 
> vertical and horizontal,
> making it the natural successor to the Multi-hole 
> forge/furnace. Dang; I
> guess it's time to get off my butt and go back to 
> building.
> Mikey
>
>
>

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