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Firebrick composition-what's good and bad? - Forno Bravo Forum: The Wood-Fired Oven Community

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Photo Galleries are back! Instructions below.

Dear forum users,
Thank you for your patience with the Photo galleries. We've got your galleries online!
We have finished writing a custom script to migrate the PhotoPlog to vBulletin5’s albums.

Unfortunately V-Bulletin killed the "Photoplogs" in their software upgrade which was unforeseen and we're the first development group to have written a script for getting the galleries back... that said, it took some time to reverse engineer the code and get the albums to move over seamlessly!

Forum users will be able to access their “PhotoPlog” images through their user profile page by clicking on the “Media” tab.
They will also be able to browse other albums by going to the albums page. (On the forum site, there is a link in the black bar beside “Forums” to the albums.)

In order for users to create an album please follow the steps below.
1) Go to user profile page and click “Media”
2) Click Add Photos
3) Enter Photo Gallery Title in the first field
4) Click Upload or Select from Photo Album to add photos
5) Click Post
6) Once posted, the album will be created as a “Topic” on the albums page for the public to see. The topic title will be the “Photo Gallery Title” they created before uploading their photos.


To create this migration path we used vBulletin5’s default album structure. Unfortunately, it won’t work like the “PhotoPlog” but is an album/gallery component on the forum now.
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Firebrick composition-what's good and bad?

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  • Firebrick composition-what's good and bad?

    I've been looking at firebricks and have found a few options with differing alumina/silica content. The closest I've found so far has 33% alumina and 63% silica (with ferric oxide, titania and accessory oxides all about 1.5%).
    Is this too much silica or won't it make much difference?
    The suppliers class this as a high duty firebrick - their low duty has about 23% alumina/73% silica. Which is more important to have the higher content??

  • #2
    Re: Firebrick composition-what's good and bad?

    The reason the plans advise against high duty brick is cost and the fact that some high duty bricks are insulating bricks - poor thermal mass. I don't know whether the chemical composition matters as much to this as the method of construction. The weight of the brick helps to assess this - heavier bricks are generally better. Can you obtain the low duty bricks from this supplier? That would probably be ideal.

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    • #3
      Re: Firebrick composition-what's good and bad?

      It sounds like the bricks you have found are perfect. 30-odd% is just what you are looking for.

      We only recommended against high duty firebricks because they are very high in alumina (I don't remember the exact figure, but I think it is something like 60%), and could get too hot when you have a big fire, and then give up heat too fast once the fire was out and you wanted to cook with retained heat. A few % +/- isn't a big deal.
      Go for it.
      James
      Pizza Ovens
      Outdoor Fireplaces

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      • #4
        Re: Firebrick composition-what's good and bad?

        Same supplier can do low/medium/high bricks. Thks for the info. The manual labor side of the project doesn't worry me but some of the technical aspects can get me a bit confused.

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