Kiln

We are trying to (a) reduce the amount of emmisisons from charcoal production and (b) Condense and recover as much of the smoke into a usable product for your home/farm. Wood tar - the following is an explanation from the good folks at Food and Agriculture Organization of the United Nations (FAO) about what is going on in this process.
"The non-water component consists of wood tars, both water soluble and insoluble, acetic acid, methanol, acetone and other complex chemicals in small amounts. If left to stand, the proligneous acid separates into two layers comprising the water insoluble tar and a watery layer containing the remaining chemicals. Recovery of the water insoluble tar, often called wood or Stockholm tar, is simple - it is merely decanted from the water phase. This wood tar has uses as a veterinary antiseptic, a preservative for wood, a caulking agent, and as a substitute for road tar" http://www.fao.org/docrep/x5328e/x5328e0d.htm

For more pictures click here

File attachments: 
A loaded kinyanjui type barrel kiln carbonizing maize cobs
free fuel!
a full kin of maize cob and branch charcoal made in less the a day
the maize cob charcoal cooks with high heat and little smoke.

Four very good reasons why to make your own charcoal from dry maize cobs.

  1. They are FREE!! (minimal processing required and are widely available as a farm waste product)
  2. Maize cob charcoal is very easy to make and leaves few charcoal fines. (no need for expensive briquetting)
  3. They are easy to light and burn very hot with little ash and are perfect for cooking a quick meal.
  4. Using maize cob charcoal means ZERO reliance on tree's and forests, LPG gas or unreliable and expensive electricity supplies for your cooking fuel needs. And with a Cookswell Jiko you can bake, boil, roast and toast all of your favorite foods
File attachments: 
From GEO BIOCHAR STOVE
From GEO BIOCHAR STOVE

* About 30% biochar production
* 3 to 4 days for a batch of charcoal production
* Continuous hot water access (pot 1)
* Highly suitable for institutional cooking and as well making biochar
* Additional heat generated by flaring the pyrolysis gases, used for cooking
* Mitigation of the emissions during the pyrolysis by flaring
* Costs about Rs. 3000 for a 2’ width x 5’ depth x 6’ hight (in feet) “GEO Biochar pit stove”. (cost including, tin sheet for cover, digging the pit, three pot stove and chimney.)

*_"GEO BIOCHAR STOVE" is designed by Dr. N. Sai Bhaskar Reddy, CEO, GEO. Demonstrated to farmers under the project Good Stoves and Biochar Communities Project, being supported by GoodPlanet.org, France

How to Build a Kiln - Various Kiln Building Links
Tom Miles, July 3, 2007

Following are various links to making kilns for bricks, stoves and pottery.

Manny Hernandez, Potters for Peace, http://www.pottersforpeace.org/
Presentations to ETHOS Conferences, 2006 and 2007
How to Build a Kiln (5MB pdf) ETHOS 2006
Kiln Building in Africa and Honduras (4 MB pdf), Presentation to ETHOS 2007

Ken Goyer AID AFRICA
Kilns and Brick Making, A rough Draft March 2006

Building a Small Flat-Top Kiln
Mel Jacobson and Kurt Wild, Pottery Making Illustrated March/April 2005
Kurt Wild's kiln 22.6 ft3

Nils Lou The Art of Firing
Linfield College, Oregon
Building a Minnesota Flat Top Kiln

Frederick L. Olsen, The Kiln Book : Materials, Specifications, And Construction, 2001, Third Edition, Krause Publications, Iola, WI. www.krausebooks.com

Joe Finch, 2006. Kiln Construction: A Brick by Brick Approach. www.upenn.edu/pennpress
www.joefinchkilns.co.uk

Pyrometric Cone Chart Evenheat Kiln, Inc.

Kilns for stoves
Construction of a kiln for firing clay stoves IFSP Malawi on HEDON

Various wood Fired Kilns for Ceramics
The Kiln Book, Materials, Specifications and Construction by Frederick Olsen
- My Olsen Fast Fire Wood Kiln

Firing Guide: Wood Firing Claystation.com

Woodfiring www.woodfiring.com

Sidestoke Gasifier Kiln
Bourry Box or Hob firebox downdraft gasifier side stoker
Double Bourry Box Kiln
Fastfire Wood kiln vs Bourry Box
120 ft3 Bourry Box Kiln

A modification of the Bourry kiln can be found in:
Wood-fired Ceramics, Contemporary Practices, Coll Minogue and Robert Sanderson, 160 pages | 8.5 x 11 | 101 color, 118 b/w illus. Cloth 2000 | ISBN 978-0-8122-3514-2

How to Build a Kiln (5MB pdf)
Manny Hernandez, Potters for Peace
Presentations to ETHOS Conferences, 2006 and 2007
How to Build a KilnHow to Build a Kiln

World Bank to revolutionise brick making in India
The Hindu News Update Service July 28, 2006

New Delhi, July 28. (UNI): The World Bank will help Indian companies revolutionise brick making through a novel technology that would make kilns energy efficient and will be manufactured without the use of thermal energy.

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