Processing method of cathode copper

　　Cathode copperCopper smelting methods can be divided into two categories: pyrometallurgical industry and hydrometallurgy. More than 85 percent of the world's refined copper production is recovered from copper sulfide concentrate and recycled copper by pyrometallurgical industry. Hydrometallurgy. Metallurgical production of refined copper only accounts for about 15 percent.

(1) Pyrometallurgy industry

There are many ways to smelt copper by fire, mainly including: blast furnace smelting, reverberatory furnace smelting, flash smelting, electric furnace smelting, etc. From the above process flow chart of copper smelting, it can be seen that copper sulfide concentrate (with a copper content of 13 %-30%) Several different metallurgical industry methods can be used for smelting to obtain matte, and then through converter blowing to obtain blister copper containing more than 97.5% copper, because the product quality of blister copper still does not reach industrial grade copper It is required that the refined copper obtained after refining must contain more than 99.95% of copper. In the process of smelting copper sulfide concentrate, it is also possible to recycle sulfur, gold, silver, antimony, bismuth, nickel, selenium and other valuable element

In my country, the main method for obtaining metallic copper from copper concentrate is the pyrometallurgical industry, and the more preferred method is flash smelting, whose production accounts for more than 30 percent of the national copper production. Because of low energy consumption, operating Large scale, can reasonably control air pollution and other advantages. This smelting technology is gaining increasing development in the copper smelting industry. Flash smelting can be divided into 2 types according to the working principle of different furnace types: Outokumpu flash smelting, InCo flash smelting smelting.

(2) Hydrometallurgy

Hydrometallurgy is combined with pyrometallurgy in many cases. The main link is that the chemical reaction is carried out in an aqueous solution. Copper (zinc) minerals are pre-calcined by oxidation or sulfuric acid to transform into a soluble state, and then leaching and purification are carried out. Electrodeposition to obtain electrolytic copper. Usually there are RLE method, atmospheric pressure ammonia leaching method (Abit method), high pressure ammonia leaching method, bacterial leaching method, etc. From roasting → leaching → purification → electrowinning, referred to as RLE method. Its production Process flow, hydrometallurgy is mainly used to obtain metallic copper from low-grade oxidized ore, waste ore heap and flotation tailings.