Roger Graham on fri 3 may 02
This one is for Brian who was looking for a refractory mix for burner ports
etc. The recipe we've been using is:
Dry powdered fireclay 3000 grams
Water 825 grams
White stoneware clay 765 grams (soft, ready-to-throw, straight from
the pugmill)
Knead and wedge the mixture to a soft workable consistency. You can throw
the usual cylindrical shapes for burner ports, spyholes, spyhole bungs etc.
Fire to cone 10 before putting into service, and expect a shrinkage of about
9%.
(For a spyhole bung, throw a light-weight hollow shape with a big generous
knob. Stuff the hollow with ceramic fibre.)
Also makes good ceramic anchor buttons for securing fibre kiln lining.
Email me off-line if you want more details about these.
Powdered fireclay here (Australia) can be bought by the kilogram from
pottery supply houses, but is surprisingly expensive. Or bought in 25 kilo
bags for only $6 from a local building-supply hardware shop. Used in the
building trade somewhere. You get two Brownie points for guessing which one
we use.
Alan D. Scott on sat 4 may 02
Roger:
Skip the Brownie points for guessing! The REAL question is:
What is the powdered fireclay sold for in the building-supply hardware shop
(an ingredient in mortar)? Perhaps others may be sitting on a goldmine
without knowing it. Please talk to the hardware man and let us all know.
Alan
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of Roger Graham
Sent: Friday, May 03, 2002 05:27
To: CLAYART@LSV.CERAMICS.ORG
Subject: Refractory mix for burner ports etc.
This one is for Brian who was looking for a refractory mix for burner ports
etc. The recipe we've been using is:
Dry powdered fireclay 3000 grams
Water 825 grams
White stoneware clay 765 grams (soft, ready-to-throw, straight from
the pugmill)
Knead and wedge the mixture to a soft workable consistency. You can throw
the usual cylindrical shapes for burner ports, spyholes, spyhole bungs etc.
Fire to cone 10 before putting into service, and expect a shrinkage of about
9%.
(For a spyhole bung, throw a light-weight hollow shape with a big generous
knob. Stuff the hollow with ceramic fibre.)
Also makes good ceramic anchor buttons for securing fibre kiln lining.
Email me off-line if you want more details about these.
Powdered fireclay here (Australia) can be bought by the kilogram from
pottery supply houses, but is surprisingly expensive. Or bought in 25 kilo
bags for only $6 from a local building-supply hardware shop. Used in the
building trade somewhere. You get two Brownie points for guessing which one
we use.
____________________________________________________________________________
__
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.
| |
|
