① According to the existing form in nature

Natural copper ;

Copper oxide;

Copper sulfide .

② According to production process

Copper concentrate - ore with high copper content selected before smelting.

Crude copper --- the product of copper concentrate after treatment, with copper content of 95-98%.

Pure copper - copper containing more than 99% after fire refining or electrolysis. 99-99.9% pure copper can be obtained by fire smelting and can be obtained by electrolysis.

③ According to main alloy composition

Brass -- copper zinc alloy

Bronze - copper tin alloy, etc. (except for zinc nickel, alloys with other elements are called bronze)

White copper copper cobalt nickel alloy

④According to product form:

Copper pipe, copper rod, copper wire, copper plate, copper strip, copper strip, copper foil, etc