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Post by pyrolyse on Jul 28, 2017 1:49:20 GMT -8
Would a ceramic flue liner from ceramic chimney stack be a good heatriser?
It it of course not very insulative, but it should be able to cope with the temperatures, right?
The reason I think they would be good for this application is because they are very thin, they are perfectly round (ideal in the heatriser), they are widely available (in my country anyways) and they are cheap. IF they can handle the extreme temperatures, it just needs some ceramic blanket on the outside of the pipe.
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Post by pyrolyse on Jul 28, 2017 1:54:25 GMT -8
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Post by Jura on Jul 28, 2017 3:52:17 GMT -8
hmm... hard to say from just looking at it. I believe asking the producer for the max. temp it may be exposed to would be the most sure way to get a proper answer. I personally doubt it will stand 1200 oC. as no one expects such temps in regular applications of that chimney system. I can see the 157,50 DKK price for the "keramikroer-oe20-50-cm" does it mean you can buy it separately from the rest part of the system? the www.scancore.dk/shop/23-scancore-trippelblok-keramisk-oe200-mm/65-keramikroer-oe20-50-cm/ |
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Post by peterberg on Jul 28, 2017 5:18:36 GMT -8
Pyrolyse,
Let's suppose it is heat resistant enough. There's still the fact that the material isn't heated up uniformely which inevitably lead to cracks.
But... there's a way around this although it sounds odd: pre-cracking of those chimney liners. That means you make one thin slit in it, lengthwise. When studying it thoroughly, one comes to the conclusion it won't crack anymore whatever part is heated up first. Just look at it and imagine a spot that's expanding. Just because of that slit it can freely move now.
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Post by pyrolyse on Jul 28, 2017 12:08:19 GMT -8
I actually did call the supplier and the chimney liners where only rated for 600 celcius. But later today I found out a supplier of firebricks near me have gotten IFB bricks rated for 1400 celcius at about 5 dollars a piece. So that's probably my best bet!
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Post by peterberg on Jul 29, 2017 0:03:15 GMT -8
The chimney liners are out of the question then. Those IFB's are quite steeply priced but it's real fascinating stuff! Make sure you build in a running bond and good quality mortar, those bricks tend to expand a surprisingly large percentage. That is, the ones that I am familiar with, yours could be different, naturally.
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Post by pyrolyse on Jul 30, 2017 9:01:25 GMT -8
It is 2600 grade insulating bricks. So they should be able to withstand the heatriser, right? The price is about 4 pounds pr. brick, is that pricy in relation to the prices in other countries?  |
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Post by peterberg on Jul 30, 2017 11:18:11 GMT -8
Those IFB's are plenty heat resistant for the riser. Four pounds per brick isn't cheap in my opinion. Firebrick is about €1 per kg in my country but I am unsure about insulating firebrick.
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Post by pyrolyse on Jul 30, 2017 14:03:25 GMT -8
I did some real Sherlock Holmes'ish research in the hope of finding IFB's in Denmark a while back. I found them, and the importer, who referred to a regular building supply store, but the bricks were an insane price of something like 10-15 pounds a piece... That made me burry any hope of building a batch box any time soon... The price I found on ildfastesten.dk is about half of the price I was told by the building supply store, so I thought it sounded pretty cheap in comparison. 😂
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Post by peterberg on Jul 31, 2017 0:15:41 GMT -8
Right you are, fetch those bricks before they are sold to somebody else! Happened to me once...
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Post by Jura on Jul 31, 2017 4:22:21 GMT -8
....but the bricks were an insane price of something like 10-15 pounds a piece... That made me burry any hope of building a batch box any time soon... The price I found on ildfastesten.dk is about half of the price I was told by the building supply store, so I thought it sounded pretty cheap in comparison. 😂 Do you happen to know what's the lambda (and other properties) of those IFB's you found? I considered constructing a heat riser of mullite bricks (Does it rank into the category you call IFB? ) due to the material perfect coefficient of thermal expansion but finally gave up. Still when I called the supplier/producer the price was 2,5 € norgpol.pl/en/our-offer/materialy-termoizolacyjne/cegly-ogniotrwale/ |
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Post by Vortex on Jul 31, 2017 11:52:19 GMT -8
Says Mullite on the ones I bought: "Product Details： Mullite insulating brick, using high pure mullite as raw material, is made by adding alumina powder according to different type and then sintering in high temperature. DJM 26 insulating blocks is the new energy saving material for insulation" www.ceceramicfiber.com/Products/DJM26Insulatingblock.htmlI think I paid about 3 to 4 euro each for them. |
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