Veins and replacement bodies associated with metamorphic rocks. Deposits . The most commonly mined type of copper deposit, porphyry copper, is found . from the mine and transported to beneficiation plants for milling and concentrating.
This KS3 education resource looks at copper mining, extraction and pyroprocessing of sulfide . To get at the copper the first stage is crushing in huge cylindrical ball mills. .. Recently, stainless steel cathodes have replaced copper cathodes.