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underground charcoal retort

i finally got around to finishing the build on my new Underground Biomass Gasification Biochar Retort Furnace over the weekend. and the 1st run resulted in some good results. I do most of my forging...

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Re: underground charcoal retort

Thanks for sharing that. Very interesting. How much wood did you go through for the burn and what was your approximate burn time? Don

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Re: underground charcoal retort

well, it was a while before i realized that having the front closed off is essential to having it work at all. i had a massive fire going and had to keep stoking it up big to keep the gasses flowing,...

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Re: underground charcoal retort

   First off let me apologize for resurrecting a four year old post.     BUT!How did the mods that you made tern out? P.S.  i did check to make sure that Matt was still active on the forums. 

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Re: underground charcoal retort

I am here !       too busy doing farm stuff in summer to heat steel but it's starting to cool down.               I ended up heaping up more dirt at the top to insulate it.  Actually,  totally burying...

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Re: underground charcoal retort

Humm maybe soak the charcoal skull in wood wood hardener?ill post pics when i get my Retort going.  

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