Metallurgical furnace

F - Mech Eng,Light,Heat,Weapons – 27 – B

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Details

39/56, 39/83

F27B 1/10 (2006.01) C21B 7/02 (2006.01) C21B 7/10 (2006.01)

Patent

CA 1076797

ABSTRACT In a metallurgical furnace having a shaft heating section for use with sized material, an improvement wherein a plurality of projections is formed on the interior wall of the preheat zone of the furnace. The length of the projections is equal to 5 to 15% of the diameter of the shaft and the projec- tions are spaced from each other a distance equal to two to ten times the length thereof. The projections may be formed as con- centric rings around the interior wall of the preheat zone of the furnace or as a continuous helix formed on the interior wall. If desired, cooling tubes may be placed within the projections.

279559

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