Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1980-04-09
1982-06-15
Rosenberg, P. D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 51, 75 52, 75 59, C21C 532, C21C 534
Patent
active
043349218
ABSTRACT:
An improved converter steelmaking process that achieves a great increase in the refining capability of top-blown oxygen is provided. The process applies to an oxygen top-blowing converter that also permits bottom blowing of gas and it is characterized by supplying oxygen from a top-blowing lance and a bottom-blowing nozzle substantially throughout the refining operation, with 2 vol. % to less than 17 vol. % of a predetermined total oxygen flow rate being supplied from the bottom-blowing nozzle whereas the remaining part of oxygen is blown onto the surface of the hot metal from the top-blowing lance.
REFERENCES:
patent: 3771998 (1973-11-01), Knuppel
patent: 3854932 (1974-12-01), Bishop
patent: 3953199 (1976-04-01), Michaelis
patent: 4089677 (1978-05-01), Spenceley
patent: 4178173 (1979-12-01), Gorges
patent: 4195985 (1980-04-01), Brotzmann
patent: 4198230 (1980-04-01), Brotzmann
Hirai Masazumi
Murakami Shozo
Nakagawa Hajime
Okohira Kazuo
Nippon Steel Corporation
Rosenberg P. D.
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