Tracey Dobbins on thu 26 nov 98
------------------
Hi All:
I'm wondering what is the average, and the longest, time folks put their
expandable metal raku fiber kilns into reduction by closing down the top =
flue?
I've heard times from 20 seconds up to 15 minutes. Will repeated 15 minute
cycles of this (at the end of every firing cycle) over time deteriorate the
fiber blanket in any way?
Another somewhat related question about the position of the flue...if the =
single
venturi burner port is placed off center in the bottom brick box, will it =
make
any difference if the top exit flue is off center, too? Does having the =
flue
not centered in the top of the lid effect the draft/vortex inside in any =
way?
Or should the burner in take port and top exit flue ALWAYS be dead center in
their placement? (Hope this makes sense=21)
Thanks in advance to all who take a moment to ponder and respond=21
Tracey
Tracey Dobbins on tue 1 dec 98
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I didn't see that this got posted, so thought I should resend =
it....thanks=21
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5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5=
F=5F=5F=5F=5F=5F
From: Tracey Dobbins on Wed, Nov 25, 1998 8:48 AM
Subject: reduction time =26 flues in fiber kiln
To: Clayart-Send my message
Hi All:
I'm wondering what is the average, and the longest, time folks put their
expandable metal raku fiber kilns into reduction by closing down the top =
flue
only at the end of the firing cycle? I've heard times from 20 seconds up to=
15
minutes. Will repeated 15 minute cycles of this over time deteriorate the =
fiber
blanket (assuming it's not treated with anything) in any way? Any ideas?
Another somewhat related question about the position of the flue...if the =
single
venturi burner port is placed off center in the bottom brick box, will it =
make
any difference if the top exit flue is off center, too? Does having the =
flue
not centered in the top of the lid effect the draft/vortex inside in any =
way?
Or should the burners in-take port and top exit flue ALWAYS be dead center =
in
their placement? (Hope this makes sense=21)
Thanks in advance to all who take a moment to ponder and respond=21
Tracey
Marc Ward on wed 2 dec 98
A few questions to answer....Been off list for a couple of weeks, so if I'm
repeating someone else, apologies.
<<
fiber
blanket (assuming it's not treated with anything) in any way? Any ideas?>>>
It won't hurt the fiber, but your anchoring system, if metal, will be affected
and shorten it's life.
<<<=
single
venturi burner port is placed off center in the bottom brick box, will it =
make
any difference if the top exit flue is off center, too? Does having the =
flue
not centered in the top of the lid effect the draft/vortex inside in any =
way?>>>>
this doesn't really matter. Most raku kilns have such high input relative to
size and lots of resulting turbulence that the ware tends to be even.
Marc Ward
Ward Burner Systems
PO Box 333
Dandridge, TN 37725
USA
423.397.2914 voice
423.397.1253 fax
wardburner@aol.com
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