[TheForge] Gun Burners (AKA fan blown)

[robert hensarling]

Chuck, let us know about using Zirconia with your T-Rex's.  I built a 
horizontal forge (12" x 24" w/3" kaowool, satinite, IHT-100{i think I have 
that name wrong} and bubble alumina on the floor (From Ellis forge 
supplies).  I'm able to get to welding temp in about 20-30 minutes, but it 
seems I leave the damascus billets in for a really long time, up to one hour 
for a not so big one (1" x 3" x 6").  I've tweaked the Rex's as per 
instructions, but I must not be doing it all right.  I have enough exhaust 
space I think.  Anyway, I'm in the process of building a blown vertical ala 
Fogg, and I'm hoping it'll make the difference I need.  I do have a digital 
heat sensor and the thermowell to keep it from melting, I can't get above 
2,200 according to it.
Robert
----- Original Message ----- 
From: "Chuck Robinson" <robi5515 at bellsouth.net>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Sunday, April 29, 2007 6:21 PM
Subject: Re: [TheForge] Gun Burners (AKA fan blown)


> Hey Mikey,
> I'm using 4 propane forges and a propane fired salt heat treating furnace.
> #1 is a blown vertical birdcage forge that is used for knifemaking and 
> forging Damascus.
>
> #2 is a 30" x 16" blown horizontal pipe forge with a Mizou cast floor  and 
> inswool shell lined with satenite. This is the forge with the ribbon 
> burner.
> It is used to weld large powder Damascus billets  and heat other large 
> billets for making hammers etc.
>
> #3 is a stainless horizontal forge with arched ceiling about 1/2 the size 
> of #2.
> It has 3 "T" Rex atmospheric burners and a castolite cast floor. I built 
> it to test out and tweak atmospheric burners. Use it occasionally for 
> lower temp multiple forging ops.
>
> #4 is  a S/S 1/2 beer keg sawed in half at the middle, and completely 
> lined with castolite.
> one end has a 6" square hole in it and the other end has a3' round hole in 
> it for a "T" Rex foundry atmospheric burner.
> It is used exclusively for heat treating the adjustable blade anvils I 
> make for the blade makers.
>
> I've been pretty disappointed with atmospheric burners for the higher heat 
> ranges I often need. So I only use them for temperatures 2200F or cooler.
> I still plan to try to coat my forges with the Zirconia solution you 
> recommended.
> How should I apply it over the satenite?
> can it just be sprayed as a final coat?
> I've been using an optical pyrometer to test the forges and still haven't 
> gotten the atmospheric burners to exceed 2350F. I'll test them with the 
> Zirconia coating to see the improvement.
> Chuck
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