Ardal Og Sunndal Verk A.s.

Olav Lid

Tormod Naterstad

Kare Gunnes

A ring section baking furnace for the indirect heating of shaped bodies or particulate material, particularly for calcination, includes vertical ducts, or channels, in pit walls arranged in groups by means of partition walls under the bottom of the pits. Flue gases are led up and down through these ducts. Combustion chambers are not provided, and the volume thereof otherwise required is incorporated into the pit volume. The ducts in each pit wall lead out over the pit wall into one or more separate rooms which connect, in series, two neighboring groups in this pit wall. A small cover plate is provided over each pit wall. Compared with earlier designs with the same external dimensions, less refractory brick is required, a more even temperature of the calcined material is achieved, the consumption of fuel is reduced and the capacity increased.

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Sunndalsora, Norway

Olav Lid