Method and apparatus for heating a workpiece

Details Method and apparatus for heating a workpiece Method and apparatus for heating a workpiece

F - Mech Eng,Light,Heat,Weapons

27

B

148/42, 38/5

F27B 9/28 (2006.01) C21D 9/00 (2006.01) C21D 9/56 (2006.01)

Patent

CA 1073787

ABSTRACT A steel strip such as stainless steel is passed in uncoiled form through a jet recuperator, an intermediate furnace section, and a main fired furnace section in which a fuel such as natural gas is burned. The exit end of the main furnace section has an opening only slightly greater than the cross-section of the strip. The strip is preheated in the jet recuperator by forcing waste gases from top and bottom waste gas chambers through holes in the bottom and top, respectively, of the waste gas chambers against both sides of the strip. The strip is further heated by the waste gases in the unfired intermediate section and brought to final temperature in the main fired section.

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