Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1989-11-21
1991-08-06
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
C22B 1514
Patent
active
050374710
ABSTRACT:
Method and apparatus for manufacturing an oxygen-free copper having an oxygen content of no greater than 3 ppm by weight are disclosed. In the method, a deoxidizing step is carried out by bringing a reducing gas containing hydrogen gas into contact with a molten copper to react to the oxygen to remove the same. Then a dehydrogenation step may be carried out by bringing a gas of lean hydrogen concentration into contact with the molten copper. Accordingly, the apparatus has a deoxidizing device for blowing the reducing gas into the molten copper and preferably a dehydrogenation device.
REFERENCES:
patent: 3607231 (1971-09-01), Hart
patent: 3987224 (1976-10-01), Brinkmann et al.
patent: 4462845 (1984-07-01), Klar et al.
A. R. Baker et al., "Deoxidation of Molten Copper by an Impringing Jet of Reducing Gas", 1983, pp. C179-C186, Trans. Inst. Min. Metall. C92.
Asao Haruhiko
Hagiwara Hideru
Iwamura Takuro
Koya Tsugio
Sato Hideki
Andrews Melvyn J.
Mitsubishi Metal Corporation
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