Vertical shaft furnace

Details Vertical shaft furnace Vertical shaft furnace

1980-03-06

1982-01-05

Camby, John J.

Heating

Shaft type

Having combustion products generated in or fed to shaft

13 2P, 266197, F27D 108, C21B 708

Patent

active

043091709

ABSTRACT:
A vertical shaft furnace for continuously melting metal materials, such as scrap, copper cathode pieces and the like is disclosed. The furnace comprises an elongated cylindrical melting chamber having an opening in the upper portion thereof for intermittently gravity-charging the furnace with metal pieces, which form a descending metal column in the melting chamber. A plurality of plasma arc generators is mounted in the sidewalls of the melting chamber extending inwardly thereof in a downwardly inclined attitude. The plasma arc torches are arranged in upper and lower vertically spaced planes for respectively preheating and melting the metal charged to the furnace. Protective refractory shrouds are provided which extend inwardly from the inside wall of the melting chamber and at least partly surround the plasma arc torches to substantially prevent damage to the torches by the descending or dropped metal charge.

REFERENCES:
patent: 2112908 (1938-04-01), Hamilton
patent: 2161180 (1939-06-01), Mary
patent: 3199977 (1965-08-01), Phillips et al.
patent: 3422206 (1969-01-01), Baker et al.
patent: 3603571 (1971-09-01), Geiger, Jr. et al.
patent: 3658307 (1972-04-01), Richardson et al.
patent: 3749803 (1973-07-01), Camacho

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