Vince Pitelka on thu 16 may 96
Pat -
Our Bourry-box kiln has ash removal/secondary air ports front and back at the
base of the throat, at the level of the firebox floor below the bag-wall. It
seems to me that this would be the ideal place to put a pair of removeable
burners to bring the kiln partway up on gas. If you don't want to remove the
burners, you could add an additional set of ports above the floor-level ports,
and mount the burner-tips out from the ports far enough so that you can insert
a piece of kiln shelf to seal off the gas port when you are switching over to
wood. We do use a pair of removeable burners placed in the ash-removal ports
at the front of the Bourry-box to preheat the kiln overnight, but they are
small burners and do not develop much heat. In either case, if your kiln is
hardbrick you have an enormous thermal mass to heat up, and any preheating with
gas will help get past the smoky stage. A properly burning Bourry-box doesn't
produce that much smoke at higher temperatures.
- Vince
Vince Pitelka - wkp0067@tntech.edu
Appalachian Center for Crafts - Tennessee Technological University
Smithville, TN
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