Richard Gralnik on sat 26 jul 97
There was an email here a few weeks ago about a company called Larkin
Brick that resells used silicon carbide kiln shelves for $30 for a
24x24x1 shelf.
I spoke to their president, Jim Wunch of yesterday. The shelves are
cheap because they have some degree of warping. Usually 1/4-3/8" but
sometimes as much as 3/4". They will cut a shelf in half for an
additional $30.
They also sell insulating materials made by a company called Zedmark
(sp?). The prices are pretty good - 2300 degF IFBs for $1.32, 2600
degF IFBs for $1.80, and so on.
Is anyone out there familiar with Zedmark and their products? How
does their quality and longevity compare to Thermal or AP Green? It
would be cheaper to have these bricks shipped from the midwest than
to buy from the local supplier, but what would I be getting. Mr. Wunch
said the Zedmark bricks have an iron content equal to those from
Thermal and have a lower calcium content. He also mentioned a
connection between Zedmark and BNZ, but I didn't write down the details.
This is an expensive and important decision, and I'd appreciate any
help or information you can offer.
Thanks,
Richard
Dennis Tobin on tue 29 jul 97
You wrote:
>
>They also sell insulating materials made by a company called Zedmark
>(sp?). The prices are pretty good - 2300 degF IFBs for $1.32, 2600
>degF IFBs for $1.80, and so on.
>
>Is anyone out there familiar with Zedmark and their products? How
>does their quality and longevity compare to Thermal or AP Green? It
>would be cheaper to have these bricks shipped from the midwest than
>to buy from the local supplier, but what would I be getting. Mr. Wunch
>said the Zedmark bricks have an iron content equal to those from
>Thermal and have a lower calcium content. He also mentioned a
>connection between Zedmark and BNZ, but I didn't write down the details.
>
>This is an expensive and important decision, and I'd appreciate any
>help or information you can offer.
>
>Thanks,
>Richard
Richard,
Five to six to six years ago Zedmark donated 10,000 hardbricks to Miami
University in Ohio. They were all seconds and all we had to pay for the
shipping. We built our soda/salt kiln with some of them three and a half
to four years agoand they seem to hold up pretty well. They were classified
as seconds because they seemed to be a bit larger than a standard brick. It
almost seems they had been overfired and they were a bit swollen, bloated
and had a bit of a fluxed look to them. There also was a bit more iron
spotting in them than bricks that I have used from A.P.Green.
Zedmark would probably send you a sample brick if you ask. I think they are
O.K. just pay attention to the size.
Dennis Tobin
Miami University
Oxford, Ohio
Arturo M DeVitalis on wed 30 jul 97
Has anyone used this brand of 2300 IFB in a reduction kiln over a period
of time?
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