#1  
Old 09-29-2009, 01:48 PM
Serf
 
Join Date: Sep 2009
Location: Spokane, WA
Posts: 5
Default Low alumina content firebricks - are these ok?

The folks at my local brickyard, as many of you have indicated in other posts, were almost completely oblivious to the differences between the different types of firebricks (low-medium-high duty). However, they were able to provide me with an MSDS-type information sheet ... WOOT

Anyways, these bricks are comprised of only 16% Al2O3 (alumina?), and I have read that the target alumina amount should be closer to 30%. Can anyone tell me if these bricks will work well in my hearth and dome?

Thank you!!
Mike
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  #2  
Old 08-23-2011, 11:53 PM
Serf
 
Join Date: May 2011
Location: Australia
Posts: 3
Default Re: Low alumina content firebricks - are these ok?

Hi Mike,

Did you ever get an answer to this question. I have the opportunity to pick some bricks up that have about 25% Alumina, which is still a fair bit lower than the recommended 36%.

Matt
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Old 08-24-2011, 12:29 PM
Serf
 
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Location: Spokane, WA
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Default Re: Low alumina content firebricks - are these ok?

Nah, I tend to ask questions on this forum that no one wants to / is able to answer ... Since posting this question, I have finished my oven with the lower alumina-content firebricks (dome and hearth) and they have worked fantastically! The oven takes a long time to heat up, but stays hot all that day and night.
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Old 08-24-2011, 01:48 PM
GianniFocaccia's Avatar
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Location: Disneyland, CA
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Default Re: Low alumina content firebricks - are these ok?

Mike,
Got any pics of your oven?
John
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  #5  
Old 08-24-2011, 07:35 PM
Serf
 
Join Date: May 2011
Location: Australia
Posts: 3
Default Re: Low alumina content firebricks - are these ok?

Hi Mike,

Thanks for your reply. Everywhere I look I seem to find mixed answers regarding the need for 30+% Alumina in oven bricks.

Glad yours worked out well.

Matt
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  #6  
Old 08-24-2011, 07:40 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
Posts: 399
Default Re: Low alumina content firebricks - are these ok?

Matt, there was a brick company in bacchus marsh that no longer makes bricks, and they had been making mostly 26% bricks for 100 years, all suitable for WFO's. They even made a dense brick in 18% which would have been ideal. Go with the bricks mate.
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Old 08-24-2011, 08:12 PM
Serf
 
Join Date: Sep 2009
Location: Spokane, WA
Posts: 5
Default Re: Low alumina content firebricks - are these ok?

Three pics attached...
Attached Thumbnails
Low alumina content firebricks - are these ok?-oven.jpg   Low alumina content firebricks - are these ok?-facade.jpg   Low alumina content firebricks - are these ok?-dome.jpg  
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  #8  
Old 08-24-2011, 08:54 PM
Serf
 
Join Date: May 2011
Location: Australia
Posts: 3
Default Re: Low alumina content firebricks - are these ok?

Thanks John. These are the bricks I'm talking about.
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  #9  
Old 08-24-2011, 08:59 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
Posts: 399
Default Re: Low alumina content firebricks - are these ok?

Quote:
Originally Posted by Matt_Blacka View Post
Thanks John. These are the bricks I'm talking about.
Cant see any pics Matt. What branding have they got? Darley? Sth yarra?
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Old 08-24-2011, 09:00 PM
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Join Date: Jun 2009
Location: Disneyland, CA
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Default Re: Low alumina content firebricks - are these ok?

Very nice, Mike. Hopefully, your story will convince doubters to build with whatever firebrick is available. An oven built with 'less-than-ideal' firebricks is better than no oven at all.
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