dianamp@COMCAST.NET on mon 27 sep 10
Dear Clayart:
Thanks for all your help with the last issue: drying cabinets.
The new question is about which refractory to use to line the "fire boxes"
in a soda kiln. By fireboxes I mean the areas between the wall of the kiln
and the bag wall (on both sides of a catenary) running the length of the ki=
ln
from front to back.
We want to line them with refractory in order to be able to remove them whe=
n they
get all gunked up, and then replace those areas with new refractory.
I called Harbison Walker; they are going to get back to me.
I think that a couple of my choices are Mizzou and KS-4.
Anybody done this in their soda kiln?
We have built a soft brick kiln coated with Feriz Delciks ITC space age lin=
er.
It will be fired to cone 6 only, not higher. Moderate or low soda.
Any ideas??
Diana Pancioli
Lee Love on mon 27 sep 10
On Mon, Sep 27, 2010 at 11:43 AM, wrote:
> Any ideas??
>
> Diana Pancioli
Diana,
I could get used 35mm X 40mm thin SiCarb shelves for
$10,00 I have thought they could be used to line a softbrick wall. I
guess the main trick would be to figure out a way to fasten them.
--=3D20
--
=3DA0Lee, a Mashiko potter in Minneapolis
http://mingeisota.blogspot.com/
=3D93Observe the wonders as they occur around you. Don't claim them. Feel
the artistry moving through and be silent.=3D94 --Rumi
jonathan byler on mon 27 sep 10
doesn't really matter what you use, it is going to be disposable
anyway. make a mix out of fireclay and sand (or crushed up
firebrick), 50/50 + 5-10% portland cement. mix very thick, add some
sodium silicate if you want to be able to add a little less water (I
would say about 40- 50 grams for about a 5 gallon bucket full of
castable as the MAX amount. try and see how this works for you.
before you ram in the castable, take a thin layer, say 1/4 inch to 1/2
inch thick of fiberfrax and line the spot where your castable is going
to go. this will make it easier to release later. protect your
castable with some zircopax mixed with about 10-20% EPK and water
(better yet use colloidal silica to make a thin slurry instead of the
EPK) paint on a thin coat and fire away.
fire real slow the first time to cook out the water in the castable.
portland cement based mortars are primitive technology in these days
with all the other expensive binders you can use, but they work for
most of the small scale clay person's needs.
someone else may have a better recipe for the castable, or you can
just buy the MIZZOU stuff or any other commercial castable. it's not
like you are building a tudish to hold 100,000 lbs of molten iron, so
you don't really need to worry about cracks or load bearing capacity
of your castable. you just need something to act as a supeficial
coating to keep the soda vapor out.
by the way, this is a great idea to do this. I meant to do it on our
kiln before I fired it the first time, and then got impatient and
fired it anyway. big mistake. hard to keep the soda sprayer aimed
right when you are shoving it into a little hole into a 2200F
atmosphere. we had a nice big puddle of soda scale eating into the
brick in one of the fireboxes because of that. if I had put in my
castable already... well you get the picture.
good luck,
jon
On Sep 27, 2010, at 11:43 AM, dianamp@comcast.net wrote:
> Dear Clayart:
>
> Thanks for all your help with the last issue: drying cabinets.
>
> The new question is about which refractory to use to line the "fire
> boxes"
> in a soda kiln. By fireboxes I mean the areas between the wall of
> the kiln
> and the bag wall (on both sides of a catenary) running the length of
> the kiln
> from front to back.
>
> We want to line them with refractory in order to be able to remove
> them when they
> get all gunked up, and then replace those areas with new refractory.
>
> I called Harbison Walker; they are going to get back to me.
> I think that a couple of my choices are Mizzou and KS-4.
> Anybody done this in their soda kiln?
>
> We have built a soft brick kiln coated with Feriz Delciks ITC space
> age liner.
> It will be fired to cone 6 only, not higher. Moderate or low soda.
>
> Any ideas??
>
> Diana Pancioli
dianamp@COMCAST.NET on mon 27 sep 10
Thank you Lee:=3D20
We have lots of extra shelves, but I bet they are not the right width!!=3D2=
0
Will check it out.=3D20
Sincerely,=3D20
Diana=3D20
----- Original Message -----=3D20
From: "Lee Love" =3D20
To: dianamp@comcast.net=3D20
Cc: Clayart@lsv.ceramics.org=3D20
Sent: Monday, September 27, 2010 4:40:13 PM=3D20
Subject: Re: refratories inside soda kiln=3D20
On Mon, Sep 27, 2010 at 11:43 AM, wrote:=3D20
> Any ideas??=3D20
>=3D20
> Diana Pancioli=3D20
Diana,=3D20
I could get used 35mm X 40mm thin SiCarb shelves for=3D20
$10,00 I have thought they could be used to line a softbrick wall. I=3D20
guess the main trick would be to figure out a way to fasten them.=3D20
--=3D20
--=3D20
Lee, a Mashiko potter in Minneapolis=3D20
http://mingeisota.blogspot.com/=3D20
=3DE2=3D80=3D9CObserve the wonders as they occur around you. Don't claim th=
em. Fe=3D
el=3D20
the artistry moving through and be silent.=3DE2=3D80=3D9D --Rumi=3D20
Dan Hill on tue 28 sep 10
Hello Diana
I have been firing ^6 soda for the last 15 yrs. or so. Last summer I
replaced my catenary arch hardbrick kiln with a Sprung arch softbrick job.
The main reason was to save on propane. Propane is extremely expensive in
rural Canada. I have gone from $200 / firing to about $60 / firing. The kil=
n
is about 30 cu.ft. of stacking space and fires in 8 hrs.
I sprayed the inside with Itc 100 - 2 coats. If I could afford it I would
have dipped the hotface of each brick while laying up the bricks.
In the fire box/ flameway areas I used old kiln shelves on the sides and
ends and I cast the bottom with Mizzou castable. This can be replaced when
necessary. I used the Mizzou in the old kiln and it held up for 100 firings
without replacement.
Hope this helps,
Thanks for your research into ^6 reduction glazes by the way.
Dan Hill
Hill Pottery
Soda fired Porcelain and Stoneware. Soda firing Workshops
www.wilnogardengallery.com
----- Original Message -----
From:
To:
Sent: Monday, September 27, 2010 12:43 PM
Subject: refratories inside soda kiln
> Dear Clayart:
>
> Thanks for all your help with the last issue: drying cabinets.
>
> The new question is about which refractory to use to line the "fire boxes=
"
> in a soda kiln. By fireboxes I mean the areas between the wall of the kil=
n
> and the bag wall (on both sides of a catenary) running the length of the
> kiln
> from front to back.
>
> We want to line them with refractory in order to be able to remove them
> when they
> get all gunked up, and then replace those areas with new refractory.
>
> I called Harbison Walker; they are going to get back to me.
> I think that a couple of my choices are Mizzou and KS-4.
> Anybody done this in their soda kiln?
>
> We have built a soft brick kiln coated with Feriz Delciks ITC space age
> liner.
> It will be fired to cone 6 only, not higher. Moderate or low soda.
>
> Any ideas??
>
> Diana Pancioli
>
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