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Post by jhiguy on Jul 7, 2011 19:27:46 GMT -8
Hi folks! I found this site (very awesome) when I was trying to find a solution to my problem. I built my rocket stove about a year ago and have used it off and on since. I love it for car camping. It is a metal 5 gallon bucket with a black stove pipe as a fire chamber and perlite for insulation. Well, I just burned through the burn chamber and I am very bummed. I thought that I might be able to find some kind of mix to trowel on to a hollow 4 in tube that would later burn off. I have been poking around this site and it seems like that may not be a valid solution. So I'm just looking for ideas. I want to keep it light. Should I just build it out of fire brick? I do not have access to clay. Thanks for taking a peak.
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hpmer
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Post by hpmer on Jul 11, 2011 16:36:16 GMT -8
I had a similar experience. I got a bucket of furnace cement at Home Depot and used that to form the feed tube and burn tunnel, forming it around stove pipe which then burnt out leaving the cement. I think you're on the right track, but also think fire brick will be much too heavy for your application.
I mixed the furnace cement with perlite in something like 1:5 cement:perlite. As long as you don't poke it it holds up well. I use half a juice can up against the back wall to handle the abuse. When it burns out it is simple enough to swap it out.
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hpmer
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Post by hpmer on Jul 11, 2011 16:42:41 GMT -8
Incidently, your setup looks a lot like an earlier version of one I built. I then moved on to a 4" feed tube and a 6" riser. The performance improvement was notable. I used 6" food cans surrounded by a clay/ash mixture against the cans surrounded by perlite.
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Post by jhiguy on Jul 12, 2011 7:16:23 GMT -8
Thank you, that helps a lot. The stove pipe was kind of expensive and I didn't know what to try. That's is interesting about going with a greater diameter riser. I would like to find some local clay as well, need to track down a potter.
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Post by Donkey on Jul 13, 2011 8:48:43 GMT -8
I've used a wood ash/ clay mixture.
Seems to work well.
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Post by jhiguy on Jul 13, 2011 18:02:51 GMT -8
Donkey, I've seen your work on another thread where you use cardboard as forms and fill up complete with wood ash/clay. Do you think it would be possible to trowel on to a cardboard tube so that you could keep the inner body perlite for weight reasons?
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Post by Donkey on Jul 21, 2011 21:55:36 GMT -8
I've wondered the same thing though haven't tried it yet.
I think it would definitely worth a try.
One of the tricks is (going to be) to get a creamy mix that's easy to trowel and won't crack when drying or firing.
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