Process for extracting copper by wet method from copper-containing sulfidization ore

Abstract

The invention relates to a method for extracting copper by a copper-containing sulphide ore wet method, which is characterized in that: (1) under the catalytic action of chloride ions, acid water solution containing ferric ions is used to leach a copper-containing sulphide ore, ore pulp is precipitated and then is divided into two parts of upper clear liquid and bottom current; (2) the upper clear liquid is sent into an anode chamber of a diaphragm electrolytic cell to perform the anode oxidation reaction to ferrous ions in the upper clear liquid to generate the ferric ions which are returned to step (1) to be served as leachate; the bottom current is leached out through oxidation iron removal and is subject to the solid-liquid separation; (3) solution obtained after the bottom current is leached out through the oxidation iron removal and is subject to the solid-liquid separation in the step (2) is sent into a cathode chamber of the diaphragm electrolytic cell to be electrowon to produce electrocopper, cathode waste liquid is returned to the step (1) to be leached; leaching residue, under the catalytic action of the chloride ions, oxidizes and leaches the copper in the leaching residue, and the leached copper is reclaimed through extraction-electrowinning. The method has short flow, small investment, low power consumption of electrowinning, wide applicable range of raw materials, easy process operation, and high copper recovery rate, and is environment-friendly and so on.

Description

technical field [0001] The invention relates to a method for extracting copper by wet method from copper-containing sulfide ore, relating to a method for wet-extracting copper from copper-containing sulfide ore, especially chalcopyrite. Background technique [0002] Wet copper extraction technology began in the 1960s, mainly dealing with copper oxide ore and secondary sulfide ore. About 20% of the current world production of copper is extracted from these resources by leaching-extraction-electrowinning technology. Copper concentrate with chalcopyrite as the main mineral is the main raw material of the copper industry. At present, almost all of this raw material adopts the traditional pyrometallurgy process, that is, the "smelting-blowing-refining" process. Therefore, pyrometallurgy still occupies the dominant position in current copper production. However, there are the following disadvantages in pyrometallurgy: (1) the investment cost is high, and large-scale production mu...

AI Technical Summary

Problems solved by technology

However, there are the following disadvantages in pyrometallurgy: (1) the investment cost is high, and large-scale production must be carried out; (2) SO 2 (3) For remote mines or economically underdeveloped areas, a large amount of sulfuric acid produced by pyrometallurgy is difficult to handle; (4) pyrometallurgy has relatively strict requirements on the grade and impurity content of copper concentrate Requirements, poor process adaptability

[0024] The anode reaction of electrowinning not only consumes energy in vain, but also causes acid mist to the electrowinning workshop, deteriorating the operating environment

[0025] In the chloride-salt system, chalcopyrite can be completely leached under relatively mild conditions. In the chloride-salt system, the electrodeposited anode reaction product can be used for leaching, and the energy utilization rate is very high. However, in the chloride-salt system, the electrodeposited copper is low. For many reasons, such as copper powder and chloride salt system, the equipment is severely corroded, and the hydrometallurgy copper smelting process of chloride salt system is still difficult to be industrialized for a while.

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