Method for producing high purity electrolytic copper

Details Method for producing high purity electrolytic copper Method for producing high purity electrolytic copper

1988-08-26

1989-10-17

Niebling, John F.

Metal treatment

Compositions

Heat treating

148 115C, 148404, 204106, 204108, 204146, 72205, 72224, 75109, 75118R, 164476, 164488, 164490, B22D 2500, C25C 112

Patent

active

048744360

ABSTRACT:
A method is provided for producing high purity electrolytic copper useful, for example, to make a copper wire for use in sound or image reproducing systems, such as audio, video and television systems, etc. The copper wire consists of high purity copper in which silver and sulfur contents are both not more than 0.5 ppm and preferably has a crystal grain size not less than 0.02 mm and is unidirectionally solidified or is a single crystal. Such a copper wire is manufactured by continuously casting electrodeposited copper which has been obtained by refining by re-electrolysis of electrolytic copper, using a specially arranged casting apparatus having a mold projecting to an electrolytic bath.

REFERENCES:
patent: 3692647 (1972-09-01), Chambers et al.
patent: 4076605 (1978-02-01), Bilson
patent: 4090935 (1978-05-01), Dunning et al.
patent: 4124379 (1978-11-01), Peters et al.

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