Preheat and cleaning system

Details Preheat and cleaning system Preheat and cleaning system

1979-10-03

1980-12-30

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148156, 427321, C21D 148

Patent

active

042421543

ABSTRACT:
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 surface 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 restricted elongated tubular zone so that the gases are in direct contact with the strip as it enters and passes through the tubular zone and the furnace in a direction countercurrent to the flow of the said gases.

REFERENCES:
patent: 1238011 (1917-08-01), Ellis
patent: 1310911 (1919-07-01), John
patent: 1409119 (1922-03-01), Scanlon et al.
patent: 1716956 (1929-06-01), Hepburn et al.
patent: 2587900 (1952-03-01), Robiette
patent: 2933425 (1960-04-01), Hess
patent: 3166304 (1965-01-01), Alexeff
patent: 3720546 (1973-03-01), Ayusawa et al.
patent: 3721520 (1973-03-01), Bloom
patent: 4069008 (1978-01-01), Bloom

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