Spencer Wilson on mon 25 jul 05
Hello All,
I have been researching different refractories for kiln and came across a
company the produces Zirconium Oxide refractory brick. I am curious to know
if anyone would have an opinion on how well this refractory would hold up in
a salt firing.
The site with the info is:
www.zircoa.com/product.coarse.grain/bricks.html
Also I have a local supplier of refractory brick. I would also like to know
is this brick would hold up well in salt/soda firing.
ZETA Brick
Silica 63%
Alumina 34%
Iron Oxide 1%
Calcium 0.8%
Magnesium 0.8%
Temp Range up to 1665º C
Porosity 23-29%
Absorbtion 12-17%
Density 1.8-2.0
Thank you,
Spencer R. Wilson
Fresnillo, Zacatecas, Mexico
Definitely south of the border.
Hank Murrow on mon 25 jul 05
On Jul 25, 2005, at 1:03 PM, Spencer Wilson wrote:
> Hello All,
>
> I have been researching different refractories for kiln and came
> across a
> company the produces Zirconium Oxide refractory brick. I am curious to
> know if anyone would have an opinion on how well this refractory would
> hold up in a salt firing.
Dear Spencer;
I have no direct experience with salt and zirconia brick. However, at
the U of Oregon, we scrounged some high silica brick from an APGreen
depot near Spokane WA (John Rodgers). We used this brick to construct a
salt kiln at the U, which, once the glaze formed on the surface, held
up remarkably well. It was considered a real loss when it finally had
to come down. Interestingly, it was the joints in the firebox area
which damaged the kiln. They had filled with molten salt, cooled and
hardened, and expanded upon the next firing . The walls and arch were
fine, but the expanding foundation of the kiln was not. We learned(and
it is in my posts in the archives somewhere) to cast shallow 'pans' of
very high Alumina castable (Greencast 94 & 99 (John)) which held the
molten salt until it vaporized, leaving the bricks beneath undamaged. I
do something like this for all salt and soda kilns I work on. Perhaps
something of the sort may help you with your project.
Cheers, Hank
www.murrow.biz/hank
Steve Mills on wed 27 jul 05
As a matter of interest I was recently asked to source brick for a
Potter who used a LOT of salt in their kiln (which shortened the life of
their firebox considerably). After a lot of crawling round I came up
with what the manufacturer called an Andalusite brick which has
exceptional resistance to salt as it is particularly designed for use
with it. I haven't got the formula handy; it's at work and I'm at home,
but I'll look it out and post it if anyone is particularly interested
Steve
Bath
UK
In message , Spencer Wilson writes
>Hello All,
>
>I have been researching different refractories for kiln and came across a
>company the produces Zirconium Oxide refractory brick. I am curious to kn=
>ow
>if anyone would have an opinion on how well this refractory would hold up=
> in
>a salt firing.
>
>The site with the info is:
>
>www.zircoa.com/product.coarse.grain/bricks.html
>
>Also I have a local supplier of refractory brick. I would also like to kn=
>ow
>is this brick would hold up well in salt/soda firing.
>
>ZETA Brick
>Silica 63%
>Alumina 34%
>Iron Oxide 1%
>Calcium 0.8%
>Magnesium 0.8%
>
>Temp Range up to 1665=BA C
>Porosity 23-29%
>Absorbtion 12-17%
>Density 1.8-2.0
>
>
>Thank you,
>
>Spencer R. Wilson
>Fresnillo, Zacatecas, Mexico
>Definitely south of the border.
--
Steve Mills
Bath
UK
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