Don Goodrich on thu 12 aug 99
Okay, you firebrick experts:
What can you tell me about a hard brick called ZED-SD ? I have several
from an industrial auction, but haven't been able to locate a manufacturer or
data on them. They came from a glass plant, so are likely pretty durable, but
I'd like to know their rated limits.
Don Goodrich
goodrichdn@aol.com
http://members.aol.com/goodrichdn/
Tracy Dotson on fri 13 aug 99
Don...you have a Zedmark brick...High duty almost super duty...I have used
them in Salt kilns with really good results. How many did you get? worth in
the Asheville NC area about $2.98 to $3.50 each Tracy
Burt Cohen on fri 13 aug 99
Don Goodrich wrote:
>
> ----------------------------Original message----------------------------
> Okay, you firebrick experts:
> What can you tell me about a hard brick called ZED-SD ? I have several
> from an industrial auction, but haven't been able to locate a manufacturer or
> data on them. They came from a glass plant, so are likely pretty durable, but
> I'd like to know their rated limits.
>
> Don Goodrich
> goodrichdn@aol.com
>
----------------------------------------------------------------------
Describe the brick for us Don- In general however,I will tell you what I
know about Glass factory bricks. The hard brick from these plants tend
to be high silica, this is because they are part of lairs which are
brought up to temperature and then remain there for years at a time. In
other word they aren't worried about quartz inversion-translated that
means that these bricks don't have great thermal shock qualities-
they'll often crack on you. The other thing you have to watch out for
with glass industry brick is contamination with heavy metals which will
leach out and effloresce. These metals cane be cause havoc with glazes
not to mention dangers to you when you are loading and unloading the
kiln. The heavier brick when new can be good for thermal mass in a kiln.
Yours,
Burt Cohen
Northfire Pottery
http://northfire.virtualave.net
Don Goodrich on tue 17 aug 99
Tracy, Burt:
Thanks for the leads on my glass tank brick. The Zedmark name was the
missing link I needed. I've been perusing industry websites the past few days
and it looks like these are indeed suitable for quite high duty. Might have
been intended for checkers in the regenerative furnaces. At 7 kilos apiece,
they'd certainly provide thermal mass. (Let's see: at 75 x 170 x 230mm,
that'd be a density of better than 2.38 g/cc.) Since they're new and
practically white, heavy metal contamination seems unlikely. I've used a
couple as props for odd-shaped objects in a few firings, and there've been no
cracks yet. The 144 I have wouldn't build a big kiln, but ought to be
suitable for a floor.
Again, thanks for the advice.
Don Goodrich in Zion, Illinois
Tracy Dotson wrote:
>Don...you have a Zedmark brick...High duty almost super duty...I have used
them in Salt kilns with really good results.<
Burt Cohen wrote:
> The hard brick from these plants tend
to be high silica, this is because they are part of lairs which are
brought up to temperature and then remain there for years at a time. In
other word they aren't worried about quartz inversion-translated that
means that these bricks don't have great thermal shock qualities-
they'll often crack on you. The other thing you have to watch out for
with glass industry brick is contamination with heavy metals which will
leach out and effloresce.<
Elizabeth Swenson on tue 22 oct 02
Elizabeth Swenson
eswenson@mcn.org
I am hoping to building a salt/soda kiln someday and I can get locally about
400 AP Green Clipper bricks (new) that are 12 x 12 x 2.5. for $1 each. I am
trying to figure out if I should get them.
The bricks are rated to 3000 degrees but I am concerned that the size in
impractical but have no kiln building experience to draw on.
I want to build a smallish kiln (about 3 wide x 4deep x 4high). I'd need to
get additional bricks. I am looking for opinions and any experiences people
have had with using this kind of brick.
Paul Herman on wed 23 oct 02
Elizabeth,
Sounds like a great bargain at $1 each. They make a good floor if
installed over insulating brick. You only need 12 for your proposed kiln
however, and to use more of them you might need access to a bricksaw.
I have used them as lintels over stokeholes, etc. but cut I cut them
down to 9"X12" size.
As far as the brand, Clippers are top quality "super duty" bricks.
Good luck,
Paul Herman
Great Basin Pottery
423-725 Scott Road
Doyle, California 96109 US
potter@psln.com
> Elizabeth Swenson wrote:
> eswenson@mcn.org
>
> I am hoping to building a salt/soda kiln someday and I can get locally about
> 400 AP Green Clipper bricks (new) that are 12 x 12 x 2.5. for $1 each. I am
> trying to figure out if I should get them.
>
> The bricks are rated to 3000 degrees but I am concerned that the size in
> impractical but have no kiln building experience to draw on.
>
> I want to build a smallish kiln (about 3 wide x 4deep x 4high). I'd need to
> get additional bricks. I am looking for opinions and any experiences people
> have had with using this kind of brick.
>
Brandon Phillips on wed 23 oct 02
I have used clippers for both a salt kiln and a wood kiln. I think that
they are very very good bricks. The only problem is that they tend to spall
after repeated salt firings. I would recommend coating them with something
before firing with salt.
Brandon Phillips
Abilene, TX
>I am hoping to building a salt/soda kiln someday and I can get locally
>about
>400 AP Green Clipper bricks (new) that are 12 x 12 x 2.5. for $1 each. I am
>trying to figure out if I should get them.
>
>The bricks are rated to 3000 degrees but I am concerned that the size in
>impractical but have no kiln building experience to draw on.
>
>I want to build a smallish kiln (about 3 wide x 4deep x 4high). I'd need to
>get additional bricks. I am looking for opinions and any experiences
>people
>have had with using this kind of brick.
>
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David Hendley on wed 23 oct 02
Elizabeth, huge new bricks for $1 each is a great deal. If you have
the money, the means to move them, and the storage space, I suggest
you buy them.
Even if they are too big to use for the wall of a small kiln, they would
be really good for the floor and foundation.
Heck, for that price, you can use any extras to make a sidewalk or
patio next to your kiln.
You always need more bricks than you thought when building a kiln.
The floors of my kiln have always been made with odd-shaped
bricks, usually 9 X 6 X 3" tapered key bricks.
"Clipper" bricks are not the best bricks in terms of handling heat
and having long life, but they are OK. ("Empires" are better).
David Hendley
Maydelle, Texas
hendley@tyler.net
http://www.farmpots.com
----- Original Message -----
From: "Elizabeth Swenson"
To:
Sent: Tuesday, October 22, 2002 11:34 PM
Subject: brick question
> Elizabeth Swenson
> eswenson@mcn.org
>
> I am hoping to building a salt/soda kiln someday and I can get locally
about
> 400 AP Green Clipper bricks (new) that are 12 x 12 x 2.5. for $1 each. I
am
> trying to figure out if I should get them.
>
> The bricks are rated to 3000 degrees but I am concerned that the size in
> impractical but have no kiln building experience to draw on.
>
> I want to build a smallish kiln (about 3 wide x 4deep x 4high). I'd need
to
> get additional bricks. I am looking for opinions and any experiences
people
> have had with using this kind of brick.
>
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