Method and apparatus for electrowinning copper using the...

Details Method and apparatus for electrowinning copper using the... Method and apparatus for electrowinning copper using the...

2008-05-27

2008-05-27

Wilkins, III, Harry D (Department: 1795)

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Preparing single metal

C205S574000, C205S586000

Reexamination Certificate

active

10629497

ABSTRACT:
The present invention relates, generally, to a method and apparatus for electrowinning metals, and more particularly to a method and apparatus for copper electrowinning using the ferrous/ferric anode reaction. In general, the use of a flow-through anode—coupled with an effective electrolyte circulation system—enables the efficient and cost-effective operation of a copper electrowinning system employing the ferrous/ferric anode reaction at a total cell voltage of less than about 1.5 V and at current densities of greater than about 26 Amps per square foot (about 280 A/m2), and reduces acid mist generation. Furthermore, the use of such a system permits the use of low ferrous iron concentrations and optimized electrolyte flow rates as compared to prior art systems while producing high quality, commercially saleable product (i.e., LME Grade A copper cathode or equivalent), which is advantageous.

REFERENCES:
patent: 2792342 (1957-05-01), Tuwiner
patent: 3972795 (1976-08-01), Goens et al.
patent: 5492608 (1996-02-01), Sandoval et al.
patent: 5622615 (1997-04-01), Young et al.
patent: 02-229788 (1990-09-01), None
International Search Report; Date of Mailing: Jul. 13, 2005 ISA: European Patent Office.

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