LOWELL BAKER on sun 28 jan 01
We just finished another firing in the Alabama Flat top
wood/sawdust injection kiln. Cone 12 throughout. Looks good but
we will have to wait until Tuesday to see.
How did the Hog Chain groundhog go Merrie?
W. Lowell Baker
The University of Alabama
Don Hunt on mon 29 jan 01
Are you considering a spark arrester for this beast?
They may say we have no seasons in California but we do
Summer
Winter (happens only at night, and is done by 9am)
Fire
I am looking for a property now for a proper reduction kiln, so would be
interested in this design.
Has any one ever seen a kiln with both a updraft and a down draft
damper?
Is there any reason a updraft is superior to a downdraft?
Just wondering
Don Hunt
Mark & Sylvia Mondloch on mon 29 jan 01
Just curious. When I've burned cedar slabs in my little wood kiln, there
were lots of hot sparks that flew out the chimney- not cool when the wind
would blow them towards the shed. Are there many sparks that make it out
the kiln when you burn the sawdust? Do you have pictures and/or plans
published anywhere on this kiln and/or the sawdust burner?
Sylvia
Mark & Sylvia Mondloch
Silver Creek Pottery & Forge
W6725 Hwy 144
Random Lake, WI 53075
silvercreek@execpc.com
http://www.execpc.com/silvercreek
----- Original Message -----
> We just finished another firing in the Alabama Flat top wood/sawdust
injection kiln.
> W. Lowell Baker
> The University of Alabama
LOWELL BAKER on mon 29 jan 01
There are sparks from the sawdust fired kiln. The amount depends
on the heat of the kiln and the size of the kiln but I must tell you
there are sparks.
The burner nozzel I was using yesterday was about 2 inches in
diameter and we were producing enough heat to take the second
chamber from cone 5 to cone 12 in less than two hours. Once it
got to 12, I held by overstoking or simply shutting the burner down.
the second chamber is aproximately 50 cubic feet and it took 3
cubic feet of sawdust, fifteen minutes to burn. This small amount
of fuel produces an extraordinary amount of heat.
I measured the heat in my bourry box at over 2500 degrees and
climbing when my digital pyrometer shut down. I presume it does
not read higher that 2600. You can draw in the molten wood ash
on the sill of the door of the Bourry box and wood ash has even
flowed across the sill and down the outside wall of the kiln. We
could not make the flue smoke once the first chamber got above
2100 degrees.
This is serious fuel that for the most part is free. Have I gotten your
attention in California yet. Nice light ash too. The only tending I
had to do was add fuel every fifteen minutes, that doesn't mean I
didn't poke at the kiln as often as I could.
I am designing a Tornado kiln that will use the burner and take the
ware to a point of Iga failure/perfection. This kiln can be built in
your back yard and fired with sawdust, old household appliances,
duct tape and car parts. Cost? About $100!!!!! I will be submitting
this to CM soon (once the thousand ice tea glasses are installed).
Sawdust is and can be a viable low cost and aesthetically
appropriate fuel.
W. Lowell Baker
the University of Alabama
vince pitelka on mon 29 jan 01
> I am designing a Tornado kiln that will use the burner and take the
> ware to a point of Iga failure/perfection. This kiln can be built in
> your back yard and fired with sawdust, old household appliances,
> duct tape and car parts.
Lowell -
I admire the multifuel concept. When sawdust is unavailable, you can still
fire the kiln with old household appliances, duct tape, and car parts.
Best wishes -
- Vince
Vince Pitelka
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
Home - vpitelka@dtccom.net
615/597-5376
Work - wpitelka@tntech.edu
615/597-6801 ext. 111, fax 615/597-6803
http://www.craftcenter.tntech.edu/
Cantello Studios on tue 30 jan 01
Lowell you got my attention. This sounds like it works great, I have been
planning to build
a wood kiln for a while and I do have good source of sawdust here in Chico.
I would like to
know more about this burner system and the kiln if you are inclined to share
such info you
could e-mail me back at Cantello@2xtreme.net Thank you Chris in Chico where
the rain Gods
were more then gracious to us last week.
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of LOWELL BAKER
Sent: Monday, January 29, 2001 3:59 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Alabama tripple flat top/sawdust
Jethro Allen on wed 31 jan 01
I also am interrested so reply on list please: }
jethro
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dayton j grant on wed 31 jan 01
On Mon, 29 Jan 2001 17:37:34 -0800 Don Hunt writes:
> Are you considering a spark arrester for this beast?
>
> They may say we have no seasons in California but we do
>
> Summer
> Winter (happens only at night, and is done by 9am)
> Fire
>
> I am looking for a property now for a proper reduction kiln, so
> would be
> interested in this design.
>
> Has any one ever seen a kiln with both a updraft and a down draft
> damper?
> Is there any reason a updraft is superior to a downdraft?
>
> Just wondering
>
> Don Hunt
>
>
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> melpots@pclink.com.
>
to don hunt i dont know what you mean by superior in the comparison but
if you mean fuel efficiency the downdraft is far superior to the updraft
for the reasons of compound use of the three major forms of heat
transfer which are
1)direct transfer ..which occurs when a hot object or flame is in direct
contact with the object of the transfer
2)covection ..which is the transfer of heat due to its inherent tendency
to rise upward ,so the transfer of heat to an object directly above
3)radiation.. the transfer of heat that radiates equally in all
directions at once
so when these characters of heat are configured to instigate each other
the energy source is compounded and amplified as in the noborigama or
chamber kiln . the awareness of the placement of the charachters of heat
and other factors such as oxygen and rate of loss due to radiation
through different elements (walls made of mud ,
stone,hardbrick,softbrick,alumina based fiber etc.)type and properties of
fuel /fuel delivery system (one chunk of fuel ,many bundles ,liquid ,gas
etc)
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