Brown Boveri Corporation

William S Ruby

Otto Hochstrasser

Frank V Madaffore

Emergency cooling for an electric furnace is carried out by flowing municipal water through one part of a heat exchanger and through a hydraulic motor and using the motor output to drive a pump which forces coolant liquid in recirculatory fashion through the furnace and through another part of the heat exchanger.

Cooling of electrical furnaces

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.

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East Brunswick, NJ, United States of America

William S Ruby