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ferro-refractory cement for a TLUD?

 
pollinator
Posts: 1559
Location: Denver, CO
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I've experimented with a small TLUD biochar stove made out of food cans. It worked really well, produced charcoal and cleanly flared off the wood gas for cooking; it really was impressive.

The problem, though, was that it only produced a little bit of biochar at a time, burned out in about half an hour (TLUDs are batch stoves) and over time the cans will burn out. I'd like to scale up to a bigger size, 20 gallons or so. But I don't have he ability to work metal, and any metal will wear out over time.

Could I cast 'ferro-refractory' cement with refractory cement and metal lath or chicken wire and rebar? Or would this just implode?

Here is a link for those who do not know what TLUDs are.

https://en.wikipedia.org/wiki/Top-lit_updraft_gasifier
 
gardener
Posts: 2484
Location: Cincinnati, Ohio,Price Hill 45205
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I suspect that the heat might weaken the metals you describe.
To keep cement/concrete together (defeat cracking) add fibers. I favor Roxul rock wool insulation this application,it can take the heat. I add it to  water and blend it in,then I add the enhanced water to the dry ingredients.
Another idea is to use stainless steel. Two large mixing bowls, cheep stockpots (Harbor freight has a cheep set of 4),kitchen sinks....
 
Gilbert Fritz
pollinator
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Location: Denver, CO
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Stainless steel sounds like a good idea, I'll have to try it out.
 
Can't .... do .... plaid .... So I did this tiny ad instead:
Heat your home with the twigs that naturally fall of the trees in your yard
http://woodheat.net
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