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Fire Brick - Forno Bravo Forum: The Wood-Fired Oven Community

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New Forno Bravo Forum Feature

Forno Bravo Forum Community,

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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Fire Brick

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  • Fire Brick

    I found a local fire brick supplier for $1.05/brick. Composition is as follows:
    66.9% SiO2, 25.6% Al2O3, 2.5% Fe2O3, 2.6% alkali, 1.5% TiO2, etc. Recommended max operating temp is 2000 deg F.

    Does this look like the right stuff? I assuming SiO2 is silica of some sort and Al2O3 is Alumina of some sort but I really didn't pay too much attention in chemistry (it was an 8:00 am class)

  • #2
    Re: Fire Brick

    I don't recall firebrick composition being in any of my chem. classes... so I think you're ok.

    How much does one brick weigh? I think a medium/low duty brick of the standard size should weigh about 9 pounds. Insulating firebrick, which you don't want, are lighter, and the high-duty ones, which are REALLY hard to cut, are heavier.

    I think the weight is in the plans from FB.
    Elizabeth

    http://www.fornobravo.com/forum/f8/e...html#post41545

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    • #3
      Re: Fire Brick

      Thanks for the reply Elizabeth. The composition from the FB plans were 30% alumina and 50% silica. I believe weight should be approx 8 pounds. I know, 100% these are not insulating fire brick...way too heavy. The mfg rates them as 'low duty' but its the chemical composition I'm concerned with.

      If my assumptions are correct, are the differences in percentages (between FB plans and mfg product data literaure) a big deal? Therefore the silica content would be approximately 15% more and the alumina content approximately 4% low.

      also, i just spoke with a chemical engineer. he indicated that my assujptions are correct.

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      • #4
        Re: Fire Brick

        In my research (almost 2 yrs ago), I found "low duty" to be from 24% to 35% alumina, depending on the manufacturer. None of my findings came from a chemical engineer (I don't think you need one), all was based on data sheets and the info provided from several brick yards and a refractory supplier.
        That said, I chose "low duty" fireplace bricks that were 77 cents a piece, weighing around 8.4 to 8.5 lbs. I believe they are rated to 2100 degrees and have an alumina content of 26.5%........No cracks, no spalling, heats up quick, no issues at all.....you should be fine with you choice.

        RT

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