Method and apparatus for smelting charge materials in electric a

Details Method and apparatus for smelting charge materials in electric a Method and apparatus for smelting charge materials in electric a

1982-01-15

1983-06-14

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

373102, H05B 718, C22B 400

Patent

active

043881084

ABSTRACT:
A method for smelting charge materials in an electric arc furnace consists in that a bath of the electric arc furnace is loaded with the charge materials, electrodes of the electric arc furnace are supplied with an alternating current, the charge materials are melted, redox reactions are conducted and a finished melt and a slag are tapped, the alternating current of industrial frequency supplied to the electrodes of the electric arc furnace being first converted to one of a frequency ranging between 0.05 and 30 Hz. An apparatus for carrying into effect the above method comprises an electric arc furnace, in a bath of which are inserted electrodes. A secondary winding of a transformer is coupled with the electrodes through power supply arrangements. Between the electrodes and the transformer and in-between sections of the power supply arrangements is placed a frequency converter, control inputs of which are connected to outputs of a frequency converter control unit having inputs coupled with the power supply arrangements on the side of the electrodes of the electric arc furnace. The apparatus also comprises a unit for controlling the power input to the electric arc furnace, connected to the power supply arrangements on the side of the electrodes and intended for generating a signal energizing an electrode positioning mechanism.

REFERENCES:
patent: 3767831 (1973-10-01), Plockinger
patent: 3767831 (1973-10-01), Plockinger
patent: 3867130 (1975-02-01), Paton

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