Richard Mahaffey on sun 13 may 01
Many years ago, in Grad school while we were a bit bored, we made a kiln
out of two K 2300 firebricks by cutting half of a kiln in each side held
together with stainless hose clamps. It held a very small tile and
cone. Fired it with a propane torch. A novelty but got to cone 10
fairly quickly. That one was pretty small.
Tacoma Community College
Tacoma, Washington, USA
Logan Oplinger on tue 15 may 01
Hey, thanks for the reminder. Some time ago I wondered if it would be po=
ssible to carve a small venturi burner into a piece of IFB. After a coup=
le of experiments with shape and size, I managed to make one in a piece o=
f IFB 2.5"x2.5"x4.5" The orifice for the propane gas was made by flatten=
ing the end of a piece of copper around a sewing needle w/out breaking th=
e needle, then removing the needle. The valve was simply made from a piec=
e of plastic tubing adjusted by squeezing closed using an adjustable pinc=
h clamp. The copper tubing was connected to the plastic tubing by simply=
A crude diagram (Set the font to monospaced. Courier is ok.):
(Side View, Internal)
| | | | (All internal angles are rounded,
| | | | not sharp.)
| | | |
| |_ _ _ _ _| |
| |_||_||_||_||_| | << Circular perforated plate
| \ / | made by drilling holes into
| \ / | a 1/4" thick piece of IFB.
| \ / | It keeps the flame out of
| \ / | the throat.
| \ / |
| \ / |
|_______| _ |_______|
_______ (_) _______ << 1/4" Secondary air holes (4).
| | | | << Throat, about 3/8" diam.
| / \ |
| / _ _ \ |
| / |___| \ | << Flattened end of copper tube.
|___/ \ / \___|
---------| |--------- << Primary air shutter.
| | << Plastic tubing.
\ / 
| |\\\\\ << Pinch Clamp.
/ \ 
>> To propane tank w/ regulator.
It should be possible to combine the two into a very portable, quick firi=
ng test kiln that uses one of those 20kg propane gas bottles like those u=
sed on gas barbecues.
---- you wrote:
> Many years ago, in Grad school while we were a bit bored, we made a kil=
n out of two K 2300 firebricks by cutting half of a kiln in each side hel=
d together with stainless hose clamps. It held a very small tile and co=
ne. Fired it with a propane torch. A novelty but got to cone 10 fairly =
quickly. That one was pretty small.<
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