Talbott on sun 12 jan 97
Can anyone tell me the R- value per inch of 2600 fire brick compared to the
R- value per inch of insulating fiber??? I am trying to determine how many
inches of insulating fiber is equivalent to 6" thickness of 2600 firebrick.
Wishing I had built a double arch roof....
Tip..while rebricking the kiln door today we use one of those sheet rock
knives (wood handle and 6" toothed saw blade...cost $4 or so)... It came in
real handy for cutting specials from 2600 firebrick. ... Marshall
------------------------------------------------------------------------------
1ST ANNUAL CLAYARTERS' GALLERY-NAPLES, ME (Summmer 1997) {contact me
directly for more information}
Celia & Marshall Talbott
Pottery By Celia
Route 114
P.O. Box 4116
Naples, Maine 04055-4116
(207)693-6100 voice and fax
clupus@ime.net
Marcia Selsor on mon 13 jan 97
Marshall,
My pyrotechnics book from AP Green gives a clear rating of the R factor
in their various products. It's in my office on campus and I
am at home. Seems to me it was something like this but I'll check again
when back at school.
1 course of G23 insulating bricks = 5 courses of hardbrick
1 inch of fiber = several courses of soft brick
The book (free from manufaturer) shows graphs for heat transfer
based on 72 degree F outside vertical surface.
More later
Marcia
--
Marcia Selsor
http://www.imt.net/~mjbmls/
mjbmls@imt.net
Margaret Arial on mon 13 jan 97
what are you using beneath the floor now that asbestos isn't available? To
keep the concrete slab from exploding from the moisture in expanding from
rapid heating. I built my kiln years ago but will be moving it soon to a new
location and am wondering.
Kenneth D Westfall on mon 13 jan 97
I can't say that I have ever heard of rating fiber blanket in
R-values. I hope no one have not confused fiber glass blanket with
refractory fiber blankets. A fiber glass blanket next to a hot face 2300
bricks, I don't think will take the heat and will melt. Refractory fiber
blanket are made from Silica or Alumina and are rated the same as soft
bricks k-22, k-23, k-26 in so many inches thickness. There are chart to
show what different combination of brick and thickness of blanks, can do
to change cold face or out side kiln wall temperature will be. I don't
have a chart handy maybe some else will.
Kenneth
WardBurner@aol.com on mon 13 jan 97
Talbott,
1 inch of 8 lb density fiber is equal to 13.8 inches of firebrick. 1 inch of
6 lb density fiber is equal to 11.5 inches of firebrick.
This is equal measurements for heat loss and outside wall temperature. Not
really the same as R value but will give you an answer to your question.
Marc Ward
Ward Burner Systems
PO Box 333
Dandridge, TN 37725
USA
423.397.2914 voice
423.397.1253 fax
wardburner@aol.com
Talbott asked:
<<<the
R- value per inch of insulating fiber??? I am trying to determine how many
inches of insulating fiber is equivalent to 6" thickness of 2600 firebrick.
Wishing I had built a double arch roof....>>>>
Talbott on tue 14 jan 97
Margaret...Our kiln is a car kiln and therefore the top layer of bricks
making up the horizontal stacking platform is about 16" above the concrete
slab on which the kiln rests.. Therefore the concrete get little heat
(relatively speaking) from the kiln above... We never have had any problems
with the concrete cracking, exploding, etc... Marshall
>----------------------------Original message----------------------------
>what are you using beneath the floor now that asbestos isn't available? To
>keep the concrete slab from exploding from the moisture in expanding from
>rapid heating. I built my kiln years ago but will be moving it soon to a new
>location and am wondering.
------------------------------------------------------------------------------
1ST ANNUAL CLAYARTERS' GALLERY - NAPLES, MAINE (Summmer 1997)
{contact me directly for more information}
Celia & Marshall Talbott
Pottery By Celia
Route 114
P.O. Box 4116
Naples, Maine 04055-4116
(207)693-6100 voice and fax
clupus@ime.net
sam wainford on tue 14 jan 97
Talbott wrote:
>
> ----------------------------Original message----------------------------
> Can anyone tell me the R- value per inch of 2600 fire brick compared to the
> R- value per inch of insulating fiber??? I am trying to determine how many
> inches of insulating fiber is equivalent to 6" thickness of 2600 firebrick.
> Wishing I had built a double arch roof....
>
> Tip..while rebricking the kiln door today we use one of those sheet rock
> knives (wood handle and 6" toothed saw blade...cost $4 or so)... It came in
> real handy for cutting specials from 2600 firebrick. ... Marshall
>
> ------------------------------------------------------------------------------
> 1ST ANNUAL CLAYARTERS' GALLERY-NAPLES, ME (Summmer 1997) {contact me
> directly for more information}
> Celia & Marshall Talbott
> Pottery By Celia
> Route 114
> P.O. Box 4116
> Naples, Maine 04055-4116
> (207)693-6100 voice and fax
> clupus@ime.net
I think 1 inch of 8 lb density kaowool or inswool is equal to 8 or 9
inches of insulating brick. I use it on the roof of my salt kiln (a 50
cubic foot monster). I've go one layer of hard brick, one of k-23's and
one inch of the ceramic fiber blanket.
Frank Colson's book "Kiln Building With Space Age Materials" Has some
very good info, and kiln designs of all sorts.
sam wainford on tue 14 jan 97
Margaret Arial wrote:
>
> ----------------------------Original message----------------------------
> what are you using beneath the floor now that asbestos isn't available? To
> keep the concrete slab from exploding from the moisture in expanding from
> rapid heating. I built my kiln years ago but will be moving it soon to a new
> location and am wondering.
Margaret, Both A.P.Green, and Thermal Ceramics manufacture a ceramic
fiber board with the same insulating proberties as their fiber
blankets. One inch of the stuff ought to be enough provided you have
insulation brick on the floor. Both companies have engineer/salesmen
who can tell you exactly what you need for your specific situation.
Margaret Arial on tue 14 jan 97
off the actual sublect somewhat but still on kilns I' m asking what is a
good design for a free standing kiln shed in a moderate climate where it
rarely ever snows?Thank you for any advice please send details
..MTU19354@aol.com Thank you in advance if anyone has suggestions.
Donald G. Goldsobel on wed 15 jan 97
At 06:44 AM 1/14/97 EST, you wrote:
>----------------------------Original message----------------------------
>off the actual sublect somewhat but still on kilns I' m asking what is a
>good design for a free standing kiln shed in a moderate climate where it
>rarely ever snows?Thank you for any advice please send details
>.MTU19354@aol.com Thank you in advance if anyone has suggestions.
>
>I have a 12 cu ft steel frame kiln set up in the San Fernandeo Valley where
ther exteme in temperature is heat, not cold. Bolted to the frame are four
uprights, crossed by two horizontal angle iron beams, covered with
overlapping sheets of corrugated sheet metal. The cover is about 2 feet
above the kiln. The coverage is about 8-10 feet square. It is watter proof,
wind resistanat and will not rust. The cover is galvanized and the angle
iron is painted with high temp paint.
Hope this helps.
Donald G. Goldsobel in the rain, dank and chill of the San Fernando Valley.
Margaret Arial on thu 16 jan 97
Donald, Thank you. How did you allow for the chimney?Heard of any car kilns
where the cart and tracks are adequately protected?It has been my
understanding that a lot of the published plans were defective in this
respect.Also has anyone actually continually used a good 1 piece rollawaw or
swing out door design that is low teck enough for a welder to do it for me I
am building acar kiln when I can resolve that problem plus another downdraft
blower burner sprung arch stoneware firing kiln but this time with a door
that I do not have to unbrick each time. Margaret T. Arial former Chouinard
(Cal Arts) grad who misses calif.
Marcia Selsor on fri 17 jan 97
Dear Margaret,
I have a swing out door on the small gas kiln (40cu.ft) and a roll away
on the car kiln (60 cu.ft).
The doors have 4" Fiber fax 2" and 2"(or ceramblanket) with an outside
layer of insblok tied to an expanded metal frame with homemade
buttons.The second layer of blanket is cut to fit into the chamber.
Sprayed with rigidizer. The car floor as I mentioned in private email
has a layer of 1/4 " steel, 2"layer of blanket, one layer of hard
bricks. I previously had my new silicon shelves on the bottom in place
of steel because the kiln they were for got bulldozed. I have a new soda
kiln now so I switched to steel and put the shelves to use. There is a
snug fit with a blanket gasket on the front of the car going into the
kiln and another on the interior walls. Fiber is attached with Bray
patch and sprayed with rigidizer to avoid those nasty irritable free
fibers. Both kilns have been in use at the university for 16 years. The
frame in both are original. I rebuilt both kilns since the last
sabbatical when I added individual stacks.
The Sprung arch kiln has a bolt adjustment on the side where the hinge
for the door is located because there may be some pull from the weight
of the door. Outside frame of the door is 2x2" angle iron. Both kilns
are used heavily as much as 4 times a week at the end of the semesters.
The car is original and I (guilt!) have never greased the wheels. I
built these kilns after having hard brick doors which in my estimation
equated to lifting 1600 lbs/week. After both hands had problems and
eventually carpal tunnel surgery in 1984, I don't ever brick up doors!
Marcia in Montana
--
Marcia Selsor
http://www.imt.net/~mjbmls/
mjbmls@imt.net
Donald G. Goldsobel on sun 19 jan 97
Margaret:
My kiln is an updraft-downdraft that Harry Berman built to my design. There
is no stack. It has 6 ceramic tube burners(Harry's design) fired from
underneath the frame. The pressure is enough to make a stack superfluous.
Kilns with chimmneys usually do not have a cover over the stack. The stack
has a device to direct the output sideways so no moisture invades the kiln.
experience is that you should build as laarge a covered area as possible.
Excuse the typing but Molly the cat has been craving attention and butting
my hands etc.
Donald in Sanfernando Valley
At 07:03 AM 1/16/97 EST, you wrote:
>----------------------------Original message----------------------------
>Donald, Thank you. How did you allow for the chimney?Heard of any car kilns
>where the cart and tracks are adequately protected?It has been my
>understanding that a lot of the published plans were defective in this
>respect.Also has anyone actually continually used a good 1 piece rollawaw or
>swing out door design that is low teck enough for a welder to do it for me I
>am building acar kiln when I can resolve that problem plus another downdraft
>blower burner sprung arch stoneware firing kiln but this time with a door
>that I do not have to unbrick each time. Margaret T. Arial former Chouinard
>(Cal Arts) grad who misses calif.
>
>
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