Saturday, 21 February 2009

Charcoal Burning

Today, Jill and I have been helping our neighbours in Tottington Woods make charcoal. We normally make charcoal in a huge kiln (2.5m in diameter and 1.5m high), but today we were demonstrating the process to the local sea scouts group - 10 and 12 year olds.

The old oil drum is first packed to the top with chunks of seasoned wood from last years hazel coppice, and then kindling is placed on top. The whole drum is then turned over and placed on bricks to allow the air in to get the wood burning. The drum, when turned over, has four holes in the top to allow the smoke and gases to escape. The term 'charcoal burning' is a bit of a minsnomer as it's actually the wood that is burnt to make the charcoal. The charcoal isn't burnt until you put it on the barbie to cook your food.

Once the smoke turns clear (after about an hour and a half) the four holes are covered over with four metals sheets, and soil is piled on top to create an air seal. The vents at the bottom are also sealed with soil to exclude all the air. The drum is then left to smoulder. When it has completely cooled (about 12 hours) the drum is lifted off, and hopefully the wood that was stacked inside has turned to charcoal.






This is the finished product from our oil drum.


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