output of the flotation of sulfidic copper ores . From Chalcopyrite it contains about 20-30 % copper and normally also iron (about 30 %) and sulfur (about 30%). From Chalcocite it contains about 37-40% copper as it has no iron. Copper concentrates are processed by pyrometallurgy to pure copper by smelting and refining.
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Source: https://www.understanding-nfmetals.com/Copper/glossary.php?terms=107
Note: Copper concentrate is one of the most traded copper products in the world, representing an annual trade volume of more than 90 B$ and a gross weight of 45 Mtpa (copper weight ~ 11.5 Mtpa). The average copper grade of concentrate is ~ 25%. HS Code 260300.
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