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Refractory Bricks - Forno Bravo Forum: The Wood-Fired Oven Community


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Refractory Bricks

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  • Refractory Bricks

    I am ready to start the dome construction, but I am feeling a little uneasy about my refractory bricks. I bought them many years ago from a demolition of a glass blowing kiln. I have no idea how to determine if they are appropriate for an oven. They were manufactured Royal Gorge--I can't find any info about the company. Due to budget constraints I am hoping they are OK. Any thoughts? Also, what is the estimated amount of bricks for a tuscan style 36" oven?

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  • #2
    Re: Refractory Bricks

    Hi Marty,

    How much do they weigh and how large are they. A typical medium duty firebrick weighs about 8 lbs, so if your weight and size are consistent, you probably have the right density.

    I think it would be hard to tell the duty rating on the bricks -- which depends on the composition, but really, you will be fine regardless. Medium duty is optimal, but even high duty bricks are OK. They get really hot and cool down a little faster, but your oven would still be fine.

    You need about 180 bricks for the floor, dome and vent.
    Pizza Ovens
    Outdoor Fireplaces


    • #3
      Re: Refractory Bricks

      Would there be a concern if they were used in a glass kiln? I don't know if brick can absorb the lead or not. Just a thought.

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      If at first you don't succeed... Skydiving isn't for you.


      • #4
        Re: Refractory Bricks

        I hadn't thought about the lead. I should probably look into that. The bricks are standard size 9 x 4.5 x 2.5 and weigh 7.5 lbs.


        • #5
          Re: Refractory Bricks

          I will think about who to ask about glass and lead and get back to you. Otherwise, your bricks are looking good.
          Pizza Ovens
          Outdoor Fireplaces


          • #6
            Re: Refractory Bricks

            I sent for a lead test kit from Lead Check. LeadCheck Swabs Industrial. I contacted several testing labs and they all expressed concern because lead becomes volatile at the oven temperatures. They also thought I should test the clay I will be using for mortar. Hopefully the tests will be negative and I can get on with this project.