Electric arc furnace operation

Details Electric arc furnace operation Electric arc furnace operation

1980-02-14

1981-06-16

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 10R, 75 12, C21C 552

Patent

active

042735769

ABSTRACT:
An improved method is described for the continuous shielded arc melting of calcine in an electric arc furnace to obtain molten slag, underlain by molten metal.
The furnace is so operated that the major portion of the total energy supplied thereto is released in the arc, and the minor portion in the molten bath. The improvement consists of adjusting the electrical energy released in the bath, directly to obtaining a required active bath area calculated by means of the rate of change in the volume of the slag and indirectly to the silica:magnesia ratio in the slag. The optimum range of active bath area is derived from conditions required for the safe and continuous operation of the furnace, in order to protect the furnace walls from slag erosion and to avoid excessive electrode movement.

REFERENCES:
patent: 3715200 (1973-02-01), Archibald

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