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firebrick pieces!


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#1 CPT

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Posted 06 November 2012 - 02:44 PM

Help!

Has this happened to anyone?

When I did a Cone 06 fire, I had pieces of firebrick fly off and stick to my glazed pottery! I then get these little 'burrs' in my beautiful work and I have to sand them off.

I just vacuumed the heck out the inside of my kiln again, so hoping that will solve this ongoing issue.

Any other advice?

Thanks.

#2 Marcia Selsor

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Posted 06 November 2012 - 04:55 PM

Are the pieces coming from a lid that is not in good shape?

Marcia

#3 TJR

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Posted 06 November 2012 - 08:01 PM

I am agreeing with Marcia. There isn't any reason for soft brick bits to fly sideways, so check your lid for pieces falling off.You could put a shelf above your glazed ware, but chances are pretty good that you need to replace the lid.
TJR.

#4 Kabe

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Posted 06 November 2012 - 10:06 PM

This is a long shot and probably not right. Is there anyway a vent for the kiln (If you have a vent) is pushing air instead of pulling it out. My Kiln is out in a garage so I don't need a vent so I am not sure how they are set up on an kiln. If is possible for it to be going backwards this could put dust into the air. Hope this isn't pure stupid. But it might be. oh well. Hope you find the solution. and Happy firing.

#5 Lucille Oka

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Posted 07 November 2012 - 05:43 AM

I agree with the other possibilities, and also be very careful not to allow your vessels to lay against the kiln walls during the bisque fire. And be careful not to bump the brick walls while loading.


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#6 CPT

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Posted 07 November 2012 - 11:55 AM

thanks for the tips, everyone~ I will have to try putting a shelf on top of my work, good idea!

Hopefully it's just the lid. Will have to take a look at it.

Don't have a vent system.....just lots of fans and open windows in my studio. :)

#7 perkolator

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Posted 07 November 2012 - 05:16 PM

i would take a guess that there might have been some loose soft brick dust sitting on the top edge of the kiln walls (from lid rubbing it, or from user touching the brick when loading/unloading), then when you closed the lid the slight woosh of air blew some of the dust inward on the piece.

do you have pics of the firebrick contaminants? usually you can tell where the firebrick came from just from what it looks like - since many lids have a refractory mortar coating on them, the brick looks different than those found on the walls.

also, you said your kiln doesn't have a vent, but does it have vent intake holes in the lid?




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