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Old 05-16-2019, 06:37 PM
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Franklin Sankar Franklin Sankar is offline
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Brick for holding elements

I have used soft brick and made groves in them to hold my heating coil. Each time my elements fail I have to clean out the groves and rip out the elements etc before reinstalling new ones. My soft brick can’t take much more abuse. Jordan used kastolite 30 to make holders for the coils. Is there a more robust brick you can cut groves in to hold the elements.?
Franklin
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Old 05-16-2019, 07:59 PM
Shawn Everette Shawn Everette is offline
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More robust brick? Yes. Readily cut grooves? No.

If you have the resources encasing the coils in quartz tube can do wonders. Otherwise Dudley sells a goop that's pretty good at keeping elements in place.
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Old 05-17-2019, 10:06 AM
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Thanks.
Franklin
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Old 05-17-2019, 12:34 PM
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Pete VanderLaan Pete VanderLaan is offline
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I suspect you have a commercial kiln Franklin. The brick for the bulk of those are under engineered for the job in my opinion. Often, it's a converted ceramic kiln for as little as bisque fire but even at cone 10 the kiln is usually shut down ( by the cones themselves) so the high temp soaks that you need, never happen at all. I don't think the materials were ever envisioned to be in service 24/7.
The one time I tried building something like what Jordan proposed, I used a 2600 brick and cut shim bricks on the saw so that each layer of brick had this smaller shim leaving a gap enough for an element. It was larger, about 48x 28 inch and had seven elements. It did work well but I eventually dismantled it when we moved. Using the shim approach did take a mess of mortar but was easier in my mind to build.
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Old 05-17-2019, 04:09 PM
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Franklin Sankar Franklin Sankar is offline
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Thanks Pete. It is as you describe but using what material I could get. I like your design but I can get 2200 soft brick or hard brick. No 2600. Have to keep rebuilding every so often. Because I can only use soft brick and 6” fiber top bottom and sides.
The cavity is 10” deep and 11” diameter.
I hope Jordan did some more work on his design and can share the test results.
My fear for his design is that it may want to crack in the high furnace heat. But since it is ramping up down slowly it may be ok. Don’t know.
Franklin
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Old 05-17-2019, 08:06 PM
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you can't make it last with substandard materials. Simple as that.
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Old 05-18-2019, 10:58 AM
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Franklin Sankar Franklin Sankar is offline
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Very true
Franklin
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