Preheat and cleaning system

C - Chemistry – Metallurgy – 21 – D

Patent

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Details

38/25, 148/34.4

C21D 1/08 (2006.01) C21D 9/56 (2006.01)

Patent

CA 1103569

ABSTRACT OF THE DISCLOSURE A continuous cleaning and preheating system for steel strip to be annealed prior to being coated or otherwise treated wherein controlled reducing steps are employed to remove sur- face contaminants from the strip, which system uses direct flame heating whereby the combustion gases from open flame burners within a closed furnace flow into and along a restric- ted elongated tubular zone so that the gases are in direct contact with the strip as it enters and passes through the tub- ular zone and the furnace in a direction countercurrent to the flow of the said gases.

308621

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