Method for stably refining high carbon steel

Details Method for stably refining high carbon steel Method for stably refining high carbon steel

1981-10-28

1983-08-16

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 59, C21C 534

Patent

active

043989497

ABSTRACT:
A method for stably refining high carbon steel by top and bottom blown converter refining in which the entire quantity or part of refining pure oxygen is blown onto molten iron through a top blowing lance nozzle while blowing an inert gas into the converter through a nozzle at the bottom thereof, and wherein the bottom blown inert gas is fed at a rate less than 0.09 Nm.sup.3 /min.multidot.ton during the blowing and/or at a rate less than 0.03 Nm.sup.3 /min.multidot.ton in a controlling stage immediately after turndown.

REFERENCES:
patent: 3854932 (1974-12-01), Bishop
63rd National Open Hearth and Basic Oxygen Steel Conference Proceedings, vol. 63, Washington, D.C. Meeting, Mar. 23-26, 1980, The Iron & Steel Society of the American Institute of Mining, Metallurgical and Petroleum Engineers, pp. 131-139.
Development of Top- and Bottom-Blown Refining Process, by Yoshiharu Iida (Member) Committee 19, (Steelmaking), Subcommittee 3, Japan Society for the Promotion of Science, Sep. 26, 1980.

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