Preheating system with gas recirculation

Details Preheating system with gas recirculation Preheating system with gas recirculation

1977-08-19

1978-09-12

Envall, Jr., R. N.

Electric heating

Microwave heating

Tunnel furnace

214 18SC, 219400, 266901, 432 72, F27D 1300, F27D 1700

Patent

active

041139771

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.

REFERENCES:
patent: 3669436 (1972-06-01), Kemmetmueller
patent: 3933343 (1976-01-01), Rawlings
patent: 4012190 (1977-03-01), Dicks et al.

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