Natural copper ------ has a copper content of more than 99%, but reserves are very small.
Oxidized copper ores ----- are also few in number;
Copper sulfide ore ----- copper content is very low, generally in 2 - 3% or so, more than 80% of the world's copper is refined from copper sulfide ore.
2, according to the production process classification:
Copper concentrate ---- smelting before the selection of the ore with high copper content;
Crude copper ------ products after smelting of copper concentrates with a copper content of 95-98%;
Pure copper ------ copper with a content of 99% or more after fire-refining or electrolysis. Fire refining can get 99-99.9% pure copper, electrolysis can make the purity of copper to 99.95-99.99%.
3, according to the main alloy composition classification:
Brass ----- copper-zinc alloy;
Bronze ----- copper tin alloy, etc. (in addition to zinc-nickel, adding other elements of the alloy are called bronze);
White copper ----- copper-cobalt-nickel alloy.

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