SCOTT YEIP on fri 9 jan 04
Has anyone attempted to get as accurate a reading as possible for the =
temp in a pit firing? I realize the variables are numerous, hardwoods =
burning hotter than soft, atmospheric conditions, ect. Can one attempt =
to register temps in some way over the entire period of a firing? Any =
suggestions as to how one might attempt this?
Claybird
terry sullivan on sat 10 jan 04
Probably cone 010 is the average for a good hot pit fire, but we have
found some melted bronze fittings in one of our giant pit fires here at
Nottingham Arts. So that was up around cone 06 area. Around 1800
degrees.
Some research has shown that some Anasazi firings were close to that.
Terry Sullivan
Nottingham Center for the Arts
San Marcos, CA.
personal reply to: tsullivan@Nottinghamarts.org
wayneinkeywest on sat 10 jan 04
Perhaps one could rig a pyrometer for various parts of the pit? A metal pipe
in verious locations could be installed beforehand, and the thermocouple
lowered into it during the firing maybe?
Or perhaps tossing in some varying cones?
(that might not work, as cones measure heat work and not temp, but the lower
numbers could give one an indication of what cone, if any was reached during
the firing.
Just a thought.
Wayne Seidl
Has anyone attempted to get as accurate a reading as possible for the temp
in a pit firing? I realize the variables are numerous, hardwoods burning
hotter than soft, atmospheric conditions, ect. Can one attempt to register
temps in some way over the entire period of a firing? Any suggestions as to
how one might attempt this?
Claybird
____________________________________________________________________________
__
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
marcia selsor on sun 11 jan 04
>
Dear Scot,
Even pit firings are varied. I believe some can get very hot ..say above 2000
F. when burning over night in a hole below the ground surface. Some "pit firings'
in metal trash cans can also get hot and hotter if the wind has any effect on
it. These are very toughy and very variable.
I think even the conditions are very variable for the exact set up.
The best things to do would be set up sevral pyrometers is two or more spots
in the "pit" and chart them throughout the firing. That is the only way I can
see of monitoring your system.
Also make note of weather conditions, wind and its direction. Note your type
of combustibles as well as the type of pieces and the way they are stacked.
Best wishes,
marcia selsor
| |
|
