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The Newbies Arena Are you new to knife making? Here is all the help you will need.

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Old 06-30-2013, 03:32 PM
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Naboyle Naboyle is offline
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Refractory curing cycle?

So I finished welding the new vertical forge. It's a 12" stainless steel pipe, split in half with 6" plates welded in. So it's oval shaped. 16" tall. Got a 3" refractory floor, 1" wool walls covered in a half inch of refractory. The floor has been finished for 2 weeks. Just finished the walls yesterday, and painted the metrikote today. What is a good curing/firing cycle for refractory? I'm gettin anxious now but I don't wanna push things. I'd hate to crack it already. Any ideas?
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Old 06-30-2013, 04:04 PM
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Ray Rogers Ray Rogers is offline
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I let mine sit for 24 hours, then fired it up for 10 minutes and then let it sit another 24 hours. After that, I ran it full out for as long as I wanted to.

I don't know that it was strictly necessary to do it that way but that's what I did and there were no problems. One thing I did differently was that I assumed that the thinner wall refractory would crack sooner or later no matter what I did. To deal with that possibility, I cast the wall liner around some hardware cloth (wire mess with about 1/2" squares). Now, when it cracks at least large chunks can't fall off ...


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Old 06-30-2013, 04:18 PM
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Wish I'd of thought about that before I poured! Add it to the list for next time!
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Old 06-30-2013, 04:21 PM
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Fulmaduro Fulmaduro is offline
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I would very much like to see some pics of it, exterior and interior if you have the time. Including the outer plumbing/ blower set-up. Reason being that I could not find any detailed pics of a vertical forge when I wanted to build one. So I settled on a horizontal one. A lot of written description of one here and other places, but if you are a newbie and have little or no mental image of what is being described by those who have one, then pics would be a great help.

I still want to build a vertical forge as just having a horizontal one will not do! Any pics, tips and descriptions of your experience are welcome!

Tony Z


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Old 06-30-2013, 06:02 PM
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Tony, soon as it dries Ill take pics and post them. If you would give me your email I can send you the pics that Ed Caffrey sent me of his. I read a post somewhere that he was telling someone how it was made. I kinda understood but needed a bit more info so I contacted him and he sent me pics and answered every question I had. He's really a great guy. They are what I based mine off of and were very helpful. I had to change a few things on mine cause of the parts I already had. Didn't want to have to go buy exactly what Ed had on his. Honestly I'd of expected something from his workshop to be high tech or really extreme but it was very basic.
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Old 06-30-2013, 06:33 PM
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Naboyle, I have sent you my email address via PM. Much thanks!


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Old 06-30-2013, 09:08 PM
Kostoglotov Kostoglotov is offline
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Not familiar with the refractory you used but typically you don't want to force the water out of the refractory too quick, Most refractory manufactures will give you a curing procedure, though its usually for boiler or refinery use

The longer you can wait before putting the coals to it the better

Putting a 100W bulb in the chamber for 24 hrs seems to go a good job of accelerating the curing without causing cracking
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