Reduction furnace control

Details Reduction furnace control Reduction furnace control

1975-07-28

1976-12-14

Envall, Jr., R. N.

Metallurgical apparatus

Having means for contacting a solid metalliferous material...

With heating means, e.g., flame contact

75 11, 266156, F27D 700

Patent

active

039977110

ABSTRACT:
The invention covers methods and apparatus for controlled flue gas combustion during operation of a closed electric arc reduction furnace to produce metals and metal alloys while feeding a burden to the furnace chamber. The furnace chamber is closed by means of a flue gas hood of reduced height, complete with electrode conduits, gas exhaust pipes and charge devices. The flue gas hood is provided with one or more controlled recycled combustion gas and air supplies, through which combustion air and recycled gas enters the furnace chamber at spaced points thereover for maintaining a reduced temperature level adjacent the hood ceiling surface. The quantities introduced depend upon the prevailing temperature and/or gas analysis of the flue gas in the furnace chamber.

REFERENCES:
patent: 2894831 (1959-07-01), Old et al.
patent: 3423080 (1969-01-01), Keyser

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