Steel making method

Details Steel making method Steel making method

1982-06-23

1985-02-05

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 51, 75 52, 75 59, C21C 700

Patent

active

044976569

ABSTRACT:
A method of producing steel from ferrous hot metal containing carbon includes the steps of delivering oxygen and a surrounding sheath of hydrocarbon shielding fluid to the metal and beneath its surface to elevate the temperature to at least 1350.degree. C. Iron material taken from the group consisting of prereduced iron ore, prereduced iron pellets and iron ore or combinations thereof are then delivered to the metal at controlled rates. The rate of charging is balanced with the heat input to the bath, in order to maintain or increase the bath temperature. The heat input is supplied by the simultaneous injection of carbon and oxygen through bottom tuyeres. The rate of carbon injection is also regulated to maintain the carbon content in the bath at the desired level. After charging of the iron material has been completed, the delivery of carbon is terminated while the delivery of oxygen and hydrocarbon shielding fluid is continued until the metal carbon level is reduced at desired level, and the refining of steel is effected.

REFERENCES:
patent: 4329171 (1982-05-01), Robert

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