Title: Preheat and cleaning system

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.

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Inventors: Pilling, James T. (Upland, CA, US)

Application Number: 081531
Filing Date: 1979-10-03
Publication_date: 1980-12-30
Assignee: Kaiser Steel Corporation (Oakland, CA)
Primary Class(es): 148/533 148/634, 427/321
Other Classes:
US Patent Ref:

1238011	Aug, 1917	Ellis	432/143.
1310911	Jul, 1919	John	432/164.
1409119	Mar, 1922	Scanlon et al.	432/78.
1716956	Jun, 1929	Hepburn et al.	266/103.
2587900	Mar, 1952	Robiette	148/16.
2933425	Apr, 1960	Hess	148/13.
3166304	Jan, 1965	Alexeff	432/229.
3720546	Mar, 1973	Ayusawa et al.	148/156.
3721520	Mar, 1973	Bloom	432/143.
4069008	Jan, 1978	Bloom	432/8.

Other Refs:
Primary Examiner: Rutledge, L. Dewayne
Assistant Examiner: Sheehan, John P.
Attorney: Naylor, Neal & Uilkema