William C Ruby

US Patent:

41139771, Sep 12, 1978

Filed:

Aug 19, 1977

Appl. No.:

5/826189

Inventors:

Otto Hochstrasser - North Brunswick NJ
William S. Ruby - East Brunswick NJ

Assignee:

Brown Boveri Corporation - North Brunswick NJ

International Classification:

F27D 1300
F27D 1700

US Classification:

13 2R

Abstract:

Scrap metal is preheated by electrical radiant heating means. Volatiles driven off from the metal are mixed with air and are blown through conduits which constitute the electrical radiant heating elements. Combustion takes place inside the conduits and the products of combustion are directed through openings in the conduits onto the scrap metal. The temperature and pressure in the system is controlled by dampers arranged at each end of the conduits to vary gas recirculation.