Frank Colson on tue 25 sep 07
Rick- 1/2" thickness, #6 density of ceramic fiber blanket will do wonders
for your firing economy! It was either Scutt or Crest (?) who started
manufacturing their electric kilns with
a ceramic fiber blanket inside the metal jacket! Their kilns were way
ahead of the times and, of course, were more efficient and lasted longer
than any other kiln on the market then, or today!
Frank Colson
Author of: "Kiln Building with Space Age Materials"
----- Original Message -----
From: "Rick Hamelin"
To:
Sent: Wednesday, September 26, 2007 7:54 AM
Subject: Wrapping electric kiln w/blanket
> Hi.
> I am preparing to wrap my electric kilns (under the jacket, of course!)
> with ceramic blanket.
> It has been quite a few years since I read up on the subject and I wonder
> what your recommendations are for thickness and density. I was thinking of
> using 1/4 inch by 8lb.
> I am not considering price differences in the upfront new purchase costs
> but I wonder what is really best for heat conservation, which in the long
> run is where the savings will be.
> Thank you for your help. I can't find much free time to research this as I
> am working around the clock. I sincerely appreciate your advice.
> Rick
>
> --
> "Many a wiser men than I hath
> gone to pot." 1649
>
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Rick Hamelin on wed 26 sep 07
Hi.
I am preparing to wrap my electric kilns (under the jacket, of course!) with ceramic blanket.
It has been quite a few years since I read up on the subject and I wonder what your recommendations are for thickness and density. I was thinking of using 1/4 inch by 8lb.
I am not considering price differences in the upfront new purchase costs but I wonder what is really best for heat conservation, which in the long run is where the savings will be.
Thank you for your help. I can't find much free time to research this as I am working around the clock. I sincerely appreciate your advice.
Rick
--
"Many a wiser men than I hath
gone to pot." 1649
Dean on thu 27 sep 07
I've wrapped two kilns with blanket and it's a good
thing to do. Electrics are woefully underinsulated. I
use 1" 8lb density, which insulates about like 4 1/2"
of brick. That about triples the insulation. I
wouldn't think that 1/4" compressed under the jacket
would do that much good you need to keep as much
volume in the fiber as possible. My Skutt electric I
fired to cone 10 hundreds of times and contrary to
popular opinion the elements held up fine. My Aim
gas kiln that I have now I didn't bother to take off
the jacket and just wrapped the fiber around the
outside and secured it with aluminum flashing, a much
easier job. About 15 firings so far half to cone 10.
The stainless jacket will probably rust but it rusts
here in Hawaii anyway so who cares.
Dean
lightwavepottery.com
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