#11  
Old 01-11-2009, 02:40 PM
nissanneill's Avatar
Il Pizzaiolo
 
Join Date: Apr 2007
Location: Adelaide, South Australia
Posts: 1,846
Thumbs up Re: Fire bricks versus 'Pressed Reds'

Adrian,
the ovens are only designed to reach say a round figure of 500˚C whereas a kiln can be required to go to over 1000˚C. I have a Ward Kiln that is used for ceramics and pottery which I use for annealing and firing ceramic inks on glass and pottery. The high fire inks are fired at 860˚C so the bricks need to be better than the common reds or in your case the creams.
Back to your ovens. If the brick is fired at over 1000˚C and is only going to achieve a half that, then it will perform OK.
As RT posted earlier, the thermal shock of continually heating these bricks from cold to baking temps over a 20 or 30 year period, say each week or fortnight, MAY show sign that a firebrick may not.
I would not use a brick that crumbles when hit with a hammer, but I would use one that breaks/splits.

Cheers.

Neill
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  #12  
Old 01-11-2009, 05:24 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
Posts: 399
Default Re: Fire bricks versus 'Pressed Reds'

For anyone wanting 40% alumina firebricks and are willing to take a full pallet lot, we can offer @ $3 each. Melbourne based.
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  #13  
Old 01-16-2009, 03:56 AM
Apprentice
 
Join Date: Jul 2008
Location: Newcsatle, Australia
Posts: 104
Default Re: Fire bricks versus 'Pressed Reds'

how many are in a pallet load johnny?
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  #14  
Old 01-18-2009, 01:20 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
Posts: 399
Default Re: Fire bricks versus 'Pressed Reds'

320 pcs sized 230x115x75.
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