Primitive Technology: Pit and chimney furnace

Primitive Technology: Pit and chimney furnace - Creating a pit and chimney furnace from scratch.

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About this video:
While I’m working on other projects I’ll put up this video of an experimental furnace I built that operates by natural draft and uses charcoal as a fuel. The furnace burns the fuel on a grate for maximum area of air entry. The chimney attached to the furnace is 2 m tall above ground level. The pit is 25 cm cubed and extends below ground level. The whole structure took about 2 weeks to build.
A brick of iron oxide (from iron bacteria) mixed with charcoal powder was made and placed in the furnace sitting on a grate about 12.5 cm tall. The furnace was lit with wood and fired. Charcoal was added after this point and a high temperature was reached. The ore brick melted and produced some tiny beads of cast iron.
In contrast to the other furnace I made in the previous video, this one produced less iron while consuming the same amount of charcoal. I’d actually built this furnace before the previous video in an attempt to reduce labour by having a tall draft chimney replace the work and complexity involved with using a blower. I’ll keep experimenting with natural draft furnaces, the principle is sound but the method of introducing the ore (batches of ore on a grate instead of continuous addition of ore pellets) is probably inefficient or could be improved on.

About Primitive Technology:
Primitive technology is a hobby where you build things in the wild completely from scratch using no modern tools or materials. These are the strict rules: If you want a fire, use a fire stick - An axe, pick up a stone and shape it - A hut, build one from trees, mud, rocks etc. The challenge is seeing how far you can go without utilizing modern technology. I do not live in the wild, but enjoy building shelter, tools, and more, only utilizing natural materials. To find specific videos, visit my playlist tab for building videos focused on pyrotechnology, shelter, weapons, food & agriculture, tools & machines, and weaving & fiber.

[GeneralGravys]

I've always loved how charcoal sounds when digging through it. Like a mix of dry leaves and broken glass lol.

[jettthorp]

Honestly the greatest part of YouTube Rewind was Primitive Tech. Glad to see some recognition for one of the best channels on YouTube, and I’m glad they didn’t ruin the moment with upbeat music. Keep doing what you’re doing 👍

[carsonllorente]

Can we all agree that prim tech was the best part of YouTube rewind?

[kazakh-interista]

There are two types of primitive technology channels. Ones who specialize in making furnaces and others who build pools

Edit: ugh, just noticed that my comment is on top. Yeah, guys, completely agree, this dude is first to introduce this wonderful survival techniques, especially the ones that really matter.

[bladudemovies]

P.T. was the only good part of YouTube Rewind 2018.

[omermagen]

Have you considered trying to build a water-powered blower for high temperature furnaces?

[Case]

I love how he looks completely fine when destroying something he worked hard for.

[TweeklyLOVER]

From what I learned in Microbiology Class in University iron bacteria live on iron-rich surfaces. They wouldn't contain much iron themselves because the uptake has to be strictly regulated (iron in high doses is poisonous).
I would recommend using the bacteria as an indicator, not a source. So you should focus on taking the rock and mud the bacteria are living on.

Hope this might help. Really enjoy your content.

[dampierre]

He's gotten really buff with all that patting of dirt

[BallisticApe]

Hey mate just letting you know that this premiere feature is known to butcher your views and watch time after it “uploads”. People have reported a significant decrease compared to their normal uploads.

[jaggonjaggon]

I always used little sticks as a support for bridging gaps when I was building sand castles as a kid. Goes to show that there are just fundamental ways to do things. Really makes me smile when I see this trick in your videos, because it takes me back to my childhood.

[InvictusByz]

Just a friendly reminder to everyone; Primitive Technology's video's are closed captioned with descriptions of his work. Press "C" on desktop to quickly turn them on.

[larrymanns]

I think one of the most educational aspects of these videos is that it shows us just how truly hard it is to try and make complex modern tools alone. It really takes a team of people, a whole community, to come together to create things like metal tools.

[paracetamolicecream]

Congrats on being in youtube rewind) your part was the only part that i actualy didn't hate lol)

[alexandruoprea]

You are very soothing to watch. Calming... You can have a clouded mind, filled with all sort of thoughts, but just a minute or two of watching you in action and the storm clouds go away, the sun comes out and all is peaceful again. Thank you for your videos, David.

[lucazoeten]

Even though he has 8.9 Million subscribers, this guy is still the most underrated youtuber ever

[jd]

Give this man an eternal life, 3000 years later - dude is building a spaceship

[chrpnll]

You can see how the iron age took a while to get to

[Cardo]

There’s so many of these “primitive” you tubers now copying ur content, u shall always be the real primitive YouTuber tho🥇

[darkartist]

Just think of this guy in High school, in ceramics like pottery and bowls. so the teacher says let's make a simple pot. This guy just makes a house and a Chimney with tiny pots and bowls.