Impurity segregation in copper by controlled cooling treatment

Chemistry: electrical and wave energy – Apparatus – Electrolytic

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148 3, 420411, 420432, 420469, 420499, 420500, 204106, C25B 1104, C21D 800

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active

044746148

ABSTRACT:
A process for the formation of copper anodes useful in the electrorefining of copper. Molten partially refined copper is subjected to controlled cooling such that the impurities coalesce into larger agglomerations and in the resulting solid partially refined copper are found segregated at the boundaries of the copper crystals. These larger agglomerations are less susceptible to dissolution in the electrolyte and to deposition or entrainment at the cathode. The process allows the use of a less refined copper starting material to achieve a comparable final cathode copper product.

REFERENCES:
patent: 2834698 (1958-05-01), Newport
patent: 2976192 (1961-03-01), Saarivirta
patent: 3227644 (1966-01-01), Rutemiller
patent: 3659644 (1972-05-01), DeBie
patent: 3863703 (1975-02-01), Nishimura
patent: 4050961 (1977-09-01), Knight
Handbook of Nonferrous Metallurgy, II Recovery of the Metals, McGraw-Hill Book Company, Inc., 1945, pp. 220-225, edited by D. M. Liddell.
The Refining of Copper, McGraw-Hill Book Company, Inc., 1911, pp. 531-577, by E. D. Peters.

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