Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

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ETP Copper - Electrical Conductivity (1 reply)

S
nshiva20
1 month ago
nshiva20 1 month ago

I would like to know in which form, the impurities used to present inside ETP copper and its effects on electrical conductivity.If its affects electrical conductivity,either impurity in solution affects more or in complex mixture affects more?

J
Jorge
1 month ago
Jorge 1 month ago

During the electrolytic process some metals are in competition in the reduction process. They are the arsenic, antimony, bismuth, nickel, cobalt and iron, which can be accumulated in the anode dissolution and once a certain limit was reached, they can coprecipitate and contaminate the copper. For that reason, it is important to purify the electrolyte, for control the pH or to add additives, or to perform the electrolysis of the impure liquor, generating at the beginning the commercial cathode and an impure cathode at the end.

Pure copper is not brittle. It shows good mechanical properties, but resistance at high temperatures is not good. The impurities that cause this loss of resistance at high temperature are bismuth, antimony, lead, selenium and sulphur. The concentration of oxides of such elements in the grain borders during heating causes its fragilization.

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