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Post by mintcake on Feb 25, 2014 10:01:23 GMT -8
Cramer, your galv pipe should hold just fine. Outside the burner, you might have 600 or 700C° absolute maximum, transfered by the materials, on a very localized point. But it will be cooled by the hot gases. I think, there's no wories to have, at all. If you want something a bit more rust-proof than metal pipe, I'd try AAC(ytong /siporex). Maybe I'm just too impressed with the price, low density and insulation figures, I don't know... I do know I'm seriously thinking of building a batchbox with some kind "proper" refractory core for the hottest bits supported by this stuff. Klemen, has there been any degradation to the AAC you've had in your bench these last months? I know the temps are lower, but if it is going to be attacked by gases then I'm going to have to change my mind about it. |
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Cramer
Junior Member
Posts: 129 
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Post by Cramer on Feb 26, 2014 18:16:08 GMT -8
Cramer, your galv pipe should hold just fine. Outside the burner, you might have 600 or 700C° absolute maximum, transfered by the materials, on a very localized point. But it will be cooled by the hot gases. I think, there's no wories to have, at all. If you want something a bit more rust-proof than metal pipe, I'd try AAC(ytong /siporex). Maybe I'm just too impressed with the price, low density and insulation figures, I don't know... I do know I'm seriously thinking of building a batchbox with some kind "proper" refractory core for the hottest bits supported by this stuff. Klemen, has there been any degradation to the AAC you've had in your bench these last months? I know the temps are lower, but if it is going to be attacked by gases then I'm going to have to change my mind about it. The AAC, having lime in it, I fear would break down at extended high temperatures (above around 400 F) it is interesting material though! |
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Cramer
Junior Member
Posts: 129
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Post by Cramer on Feb 26, 2014 18:22:51 GMT -8
Anybody ever used a product called Furnascoat? www.rictec.com.sg/furnascote/I wonder if it might increase the durability of the inside of the riser sleeve? |
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Cramer
Junior Member
Posts: 129
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Post by Cramer on Mar 2, 2014 5:07:43 GMT -8
I had the prototype burning yesterday. We have had (finally) a few days in a row without precipitation! The wood I was using was still less than ideal but not too bad. The results though were phenomenal! I had a nice fire going with a few pieces of dead fall pine around 2 and 3 inches around. The flames were spiraling nicely in the bottom of the burn tunnel and riser. I went out and collected a bunch of dry sticks that had fallen in our last high wind and stuffed them into the gaps. A minute later I think my neighbor (a half a mile away) could probably have heard the rocket sound. I took a peak down the riser and everything was glowing orange! It was so hot the perlite sounded like popcorn and the flame was dancing a third of the way up the riser! I sure wish they would finish my burner section and deliver my bricks and blankets so I can get on with this!! (Sorry guys, I am a bit of a pyro and I am PUMPED!)
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Cramer
Junior Member
Posts: 129
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Post by Cramer on Mar 9, 2014 7:22:03 GMT -8
The burner base is poured and cured! Setting up delivery for all of the refractory parts of the build (except for the riser tubes which I already have) on Monday. I don't know the cost yet but I am betting a pretty penny as I am purchasing everything for this build new and not scrounging for the cheap and free stuff we all know is available out there. Next build I will go that way and be able to compare. Got to get this one out of the way first though!
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