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Cleaning Firebricks-Best Way?

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#1 Foxden



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Posted 20 August 2014 - 06:36 PM

I have a bunch if firebricks, k-23 and k-26 that I stored outside for a few years. They are in prefect condition but many are covered with algae and mold from exposure to the elements.

I was thinking I could just load them in an electric kiln, preheat to dry them and fire them to around 700 degrees to burn off the organic material.

Is there a better way?

#2 Mark C.

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Posted 20 August 2014 - 07:03 PM

Since you let them get wet-most likely they still are wet. You better go real slow heating them up to 212 degrees where steam forms.This needs to be a slow fire.

Soft brick do not do well getting wet-hopefully they did not freeze?

After firing you may still have to brush them.


Mark Cortright

#3 Foxden



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Posted 20 August 2014 - 07:17 PM

They definitely didn't freeze. I'm in Florida. I'll treat them like damp greenware. Do you think 700 is high enough? I know things burn at 451, but don't want to have do do it twice. Also, how tightly do you think I can pack them in?

#4 JBaymore



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Posted 20 August 2014 - 09:50 PM

Don't pack too tight.... they will have significant thermal lag....... since they are designed to be insulators. Stak in an open pattern to get the faces hot..... and burn off the junk. I'd go toe 1000-1100 F.





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#5 Biglou13


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Posted 21 August 2014 - 10:50 AM


i can take them off your hands if you dont want to clean them........

i'd candle them 180 ish overnight,  id even go to 210F for a few hours

think loosely packed kiln, with minimal brick overlap

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#6 Foxden



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Posted 21 August 2014 - 05:08 PM

I'll take this advice. Only the top ones on the stacks are bad. Obviously they have strong insulating properties so I will pack loosely and take time before going above 212. I might as well take it to 1000 or so, too.

Thanks for the guidance.

#7 oldlady


    single firing an electric kiln to cone 6

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Posted 21 August 2014 - 10:48 PM

why not just pour bleach on them and use a brush?  wear white.

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