Paul Herman on sun 2 mar 03
Greetings All,
I have questions for the woodfirers.
My damper, an old Silicon Carbide kiln shelf, cracked after three
firings. I'm not surprised, what with one end hot and one cold. Of
course I don't want to sacrifice any more shelves like this. The chimney
is 13.5" X 22.5" inside. The slot is 1.25". Damper 24" X 15".
My questions are, do clay or alumina shelves perform any better? And if
not, what is your practice? There is still time to order one before the
next firing in April.
I tried a piece of 1" fiber board, but it didn't hold up to salt and got
kinda droopy.
I'm considering abandoning the slot damper altogether, and using the
passive dampers (holes in the lower part of the chimney) in combination
with a chimney cap arrangement.
Any informed opinions would be much appreciated.
From Doyle, USA, where the wind is blowing and the pots are drying....
and the politicians are stupid and bellicose.
Peace,
Paul Herman
Great Basin Pottery
423-725 Scott Road
Doyle, California 96109 US
potter@psln.com
Hank Murrow on mon 3 mar 03
On Sunday, March 2, 2003, at 08:05 PM, Paul Herman wrote:
> I have questions for the woodfirers.
>
> My damper, an old Silicon Carbide kiln shelf, cracked after three
> firings. I'm not surprised, what with one end hot and one cold. Of
> course I don't want to sacrifice any more shelves like this. The
> chimney
> is 13.5" X 22.5" inside. The slot is 1.25". Damper 24" X 15".
>
> My questions are, do clay or alumina shelves perform any better? And if
> not, what is your practice? There is still time to order one before the
> next firing in April.
>
> I tried a piece of 1" fiber board, but it didn't hold up to salt and
> got
> kinda droopy.
>
> I'm considering abandoning the slot damper altogether, and using the
> passive dampers (holes in the lower part of the chimney) in combination
> with a chimney cap arrangement.
>
Dear Paul;
At Anderson Ranch in the early 70s we used a piece of stainless steel
1/2" thick in our salt kiln. It saw severe service and held up fine. We
got the stainless from a scrap yard, so cost was minimal. You can cut
to size with a torch. Also try a coating of ITC, we did not have that
available then. Gracias, Feriz!
Cheers, Hank
Steve Mills on tue 4 mar 03
Abandon the slot damper Paul; passive dampers are far and away the best
route; my previous kilns used them. Now we do it from the other end by
controlling air input, but then it's a very simple cross-draught Kiln.
It works, that's all!
Steve
Bath
UK
In message , Paul Herman writes
>Greetings All,
>
>I have questions for the woodfirers.
>
>My damper, an old Silicon Carbide kiln shelf, cracked after three
>firings. I'm not surprised, what with one end hot and one cold. Of
>course I don't want to sacrifice any more shelves like this. The chimney
>is 13.5" X 22.5" inside. The slot is 1.25". Damper 24" X 15".
>
>My questions are, do clay or alumina shelves perform any better? And if
>not, what is your practice? There is still time to order one before the
>next firing in April.
>
>I tried a piece of 1" fiber board, but it didn't hold up to salt and got
>kinda droopy.
>
>I'm considering abandoning the slot damper altogether, and using the
>passive dampers (holes in the lower part of the chimney) in combination
>with a chimney cap arrangement.
>
>Any informed opinions would be much appreciated.
>
>From Doyle, USA, where the wind is blowing and the pots are drying....
>and the politicians are stupid and bellicose.
>
>Peace,
>
>Paul Herman
>Great Basin Pottery
>423-725 Scott Road
>Doyle, California 96109 US
>potter@psln.com
--
Steve Mills
Bath
UK
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