Bubble Alumina wafer

Fred.Rowe

Fred.Rowe

Knifemaker / Craftsman / Service Provider
Joined
May 2, 2004
Messages
6,848
Bubble alumina resist the corrosive affect of borax better than most materials.
I made this wafer to use atop the fire brick in my welding forge.
I cut a piece of stiff welded wire screen to the correct size, placed it in a mold,
made with a piece of plastic sheeting and a couple of boards. Mixed up some bubble alumina in a margarine tub and poured in place. It took a day to dry. After that the wafer could be handled and put in place. It is quiet rigid.
After this wafer is used up, I can easily pour another one. It should be easier than replacing the entire floor. We'll see how it turns out.

Fred
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that sounds like it should work..
I have a sheet
of graphite I want to try out for this same thing
.. as soon as I get the melted brick out of my forge
it turned into a melted piece of glass and won't move now.:grumpy:
have you ever tried graphite Fred? I'm not sure of it's heat rating?
 
Dan Gray said:
that sounds like it should work..
I have a sheet
of graphite I want to try out for this same thing
.. as soon as I get the melted brick out of my forge
it turned into a melted piece of glass and won't move now.:grumpy:
have you ever tried graphite Fred? I'm not sure of it's heat rating?
Click to expand...

I am not sure about the graphite sheet. Its worth a try.
The bottom side of the bubble alumina wafer set up smooth and not rough like the other side. I am hoping that this temporary floor will not only protect the fire brick floor, but can be removed and replaced with another one, when it wears thin or gets too gummy with borax residue. I do not like chipping the old bricks out. You do way too much damage in the process.

Let me know if you find out anything on the graphite sheet heat rating.

Fred
 
Just my O2 try putting a piece of SS sheet underneath it. Should be a little extra Insurance.
 
thanks J on the heat info
I thought about this idea a long time ago but using it for the sides as well
but there was talk about it not holding heat as well if this the case it should be good for a tray at least.. ??
Fred if I can get my homemade glass/brick bottum by not paying more atention of it..:rolleyes::D out of the forge I'll give it a try..

Rhankins
SS sheet has been tryed by others but I'm not sure what thier results were?
the high grade H/T foil is good to ~ 2200 F I think..
 
Dan Gray said:
thanks J on the heat info
I thought about this idea a long time ago but using it for the sides as well
but there was talk about it not holding heat as well if this the case it should be good for a tray at least.. ??
Fred if I can get my homemade glass/brick bottum by not paying more atention of it..:rolleyes::D out of the forge I'll give it a try..

Rhankins
SS sheet has been tryed by others but I'm not sure what thier results were?
the high grade H/T foil is good to ~ 2200 F I think..
Click to expand...

The information, on D.E.'s site states the bubble alumina's heat rating is 3300fh.
 
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