
Hoffmann's Kiln and Bull's trench kiln - Civil Engineers PK
Dec 10, 2016· The Bull’s trench kiln. The kiln can be made circular or elliptical in shape. It is constructed on dry land, by digging trench, 6 – 9 m wide, 2 – 2.5 m deep, and 100 – 150 m long. An alternative method is to build up the sides of the kiln with bricks, especially where drainage is a problem.