Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1979-06-01
1981-04-07
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 24, 75101R, C21B 304
Patent
active
042604141
ABSTRACT:
A process for recovering and utilizing useful substances from a molten metal produced, when manufacturing a steel slag cement from a steel slag discharged from a top-blowing oxygen converter, during a reduction treatment of steel slag, which comprises the steps of: subjecting, in an acidic refining furnace, said molten metal to a primary oxidation refining treatment and a secondary oxidation refining treatment to recover a primary slag containing a large amount of TiO.sub.2 and SiO.sub.2 and a secondary slag containing a large amount of MnO and V.sub.2 O.sub.5, said primary slag being utilized as a blast furnace burden raw material serving as a TiO.sub.2 source, and said secondary slag being utilized as a raw material for producing ferromanganese and ferrovanadium; then, subjecting, in a basic Kaldo furnace, said molten metal to an oxidation refining treatment several times to recover a low-phosphorus high-quality steel and a slag, said slag being utilized as a Thomas phosphoric fertilizer.
REFERENCES:
patent: 1534819 (1925-04-01), Seth
patent: 1691274 (1928-11-01), Flodin et al.
patent: 2539485 (1951-01-01), Schoenlaub
patent: 2732293 (1956-01-01), Perrin et al.
patent: 2746857 (1956-05-01), Wright
patent: 3091524 (1963-05-01), Johnson
Ando Ryo
Kondo Renichi
Koyama Tatsuo
Kubodera Shoji
Suzuki Gyoichi
Andrews M. J.
Nippon Kokan Kabushiki Kaisha
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