Wood chipper with conical spiral knife - GIF

Wood chipper with conical spiral knife.

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Previously:

https://www.homemadetools.net/forum/...443#post116895
https://www.homemadetools.net/forum/...828#post140327
https://www.homemadetools.net/forum/...089#post138089
https://www.homemadetools.net/forum/...583#post170362
https://www.homemadetools.net/forum/...773#post152215

These don't look like the chips I'm used to seeing. Are these for a special application?

Not sure what we're making here except a big mess? This would be quick burn wood, not wringing a lot of BTUs and it looks mostly like rotted wood from teh bark I' seeing.

The chipper you are seeing is an efficient way to reduce any type wood into chips & chunks which would be placed in a pressure oven and reduced to charcoal.
Not every country around the world makes their charcoal into nice evenly shaped little pillows.
During the process of reducing what ever type of wood that has been ground into chips and burned the wood gas given of by them adds fuel to the burn process.
the older drier the wood the less time it takes to make charcoal out of it and the less outside fuel source is required.
A large sack of charcoal chips typically sells for 1/3 the cost of a bag of pillows but you never know what the quality is going to be

Never use the "pillows", hardwood lump charcoal or pellets only for me because I have no idea what's in the briquettes. The pellets are just the identified species of wood dust and water under pressure.

These chips are often used in Northern European wood burners often with an automatic feed system. Many Finn and Russian wood-chippers are designed to produce small sized pieces that can easily be shoveled or fed onto a conveyor belt. The burner feed mechanism is mostly screw fed.