Copper minerals are mainly primary minerals, so it is easy to use flotation to concentrate concentrates. Grade and amount of copper concentrate pyrite symbiotic related copper grade between 20% to 30%, Fe 20% to 30% are between 20% to 40% sulfur.
Fire method is the main technology of copper smelting. The concentrate is first smelted, sulfur is oxidized to sulfur dioxide, and most of the iron is oxidized to oxide and gangue together to form slag. Copper and other non-ferrous metals and the remaining iron sulfide generation, known as matte (pistol). The matte is further oxidized and removed by blowing to obtain blister copper, which is further refined and cast into an anode plate, and an electrolytic copper product is obtained by electrolysis. Volatile symbiotic elements are recovered in soot, and precious metals are recovered in the anode mud. The advantage of the fire method is that the heat generated by the oxidation of sulfur and iron is fully utilized; the recovery rate of the precious metal is high; the slag is stable; and the environmental impact is small. The disadvantage is that it is easy to cause air pollution; it is restricted by the sulfuric acid market. The fire method has the characteristics that the higher the grade of the concentrate, the larger the scale, the better the economic index.
The output of the world's major copper producing countries is shown in the table below. Since copper is very stable and is not oxidized in the air, its recycling rate is high.

Production of major copper producing countries in the world in 2000

country

Wet method

Smelting

regeneration

total

country

Wet method

Smelting

regeneration

total

Australia

10

38.7

 

48.7

Mexico

4.78

34

1.5

40.3

Canada

 

49.1

6.1

55.1

Peru

12.7

32.4

 

45.1

Chile

137.2

129.6

 

266.8

Poland

 

46.6

2

8.2

China

 

106

34

140

Russia

 

64

20

84

Germany

 

33.5

37.5

71

Spain

 

25.1

6.5

31.6

Iran

1.4

13

 

14.4

United States

55.7

103

20.8

179

Japan

 

129

14.7

143.7

Zambia

5.5

17

 

22.5

Korea

 

47.1

0.4

47.5

worldwide

249

1050

191

1500

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