Method for producing blister copper by reduction smelting of cuprous oxide converted from cuprous chloride

A technology of cuprous oxide and cuprous chloride, which is applied in the field of copper smelting, can solve problems such as complex process flow, troublesome process, and complicated technology, and achieve the effects of high copper recovery rate, reduced production cost, and simple process

Active Publication Date: 2012-02-08
SHENYANG RES INST OF NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrolysis process uses an ion membrane, which requires a special cathode, which is technically too complicated
[0013] 2) Although copper can be transferred from chloride solution to sulfate solution through many extraction routes, and then electrodeposited to obtain normal electrolytic copper, the process is complicated and the process is troublesome

Method used

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  • Method for producing blister copper by reduction smelting of cuprous oxide converted from cuprous chloride
  • Method for producing blister copper by reduction smelting of cuprous oxide converted from cuprous chloride

Examples

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Embodiment 1

[0035] The copper sulfide concentrate is chlorinated and leached, and sulfur and gold are recovered from the leached slag; after the leaching solution is reduced, purified, and impurities removed, a cuprous chloride solution is obtained, and limestone is added to the cuprous chloride solution to precipitate cuprous oxide. The precipitated cuprous oxide is subjected to reduction smelting. The technical conditions for cuprous oxide precipitation are: the concentration of monovalent copper ions is 20g / L, the ratio of the amount of limestone added to the theoretical amount is 1, the precipitation temperature is 40°C, the reaction time is 60min, and the pH value at the end of the reaction is 7. After the reaction is completed, the solid-liquid separation is carried out, and the solid cuprous oxide is reduced and smelted to obtain crude copper; the filtrate is added with sulfuric acid to regenerate the hydrochloric acid, and at the same time the by-product gypsum is produced, and the...

Embodiment 2

[0043]The copper sulfide concentrate is chlorinated and leached, and sulfur and gold are recovered from the leached slag; after the leaching solution is reduced, purified, and impurities removed, a cuprous chloride solution is obtained, and limestone is added to the cuprous chloride solution to precipitate cuprous oxide. The precipitated cuprous oxide is subjected to reduction smelting. The technical conditions for cuprous oxide precipitation are: the concentration of monovalent copper ions is 45g / L, the ratio of the amount of limestone added to the theoretical amount is 1.05, the precipitation temperature is 70°C, the reaction time is 60min, and the pH value at the end of the reaction is 7.5. After the reaction is completed, the solid-liquid separation is carried out, and the solid cuprous oxide is reduced and smelted to obtain crude copper; the filtrate is added with sulfuric acid to regenerate the hydrochloric acid, and at the same time the by-product gypsum is produced, and...

Embodiment 3

[0051] The copper sulfide concentrate is chlorinated and leached, and sulfur and gold are recovered from the leached slag; after the leaching solution is reduced, purified, and impurities removed, a cuprous chloride solution is obtained, and limestone is added to the cuprous chloride solution to precipitate cuprous oxide. The precipitated cuprous oxide is subjected to reduction smelting. The technical conditions for cuprous oxide precipitation are: the concentration of monovalent copper ions is 65g / L, the ratio of the amount of limestone added to the theoretical amount is 1.1, the precipitation temperature is 70°C, the reaction time is 120min, and the pH value at the end of the reaction is 8.0. After the reaction is completed, the solid-liquid separation is carried out, and the solid cuprous oxide is reduced and smelted to obtain crude copper; the filtrate is added with sulfuric acid to regenerate the hydrochloric acid, and at the same time the by-product gypsum is produced, an...

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Abstract

The invention relates to a method for producing blister copper by reduction smelting of cuprous oxide converted from cuprous chloride. The method is characterized by: (1) conducting chlorination leaching to copper sulphide concentrates through multi-stage countercurrent leaching, subjecting the leachate to reduction, purification and impurity removal so as to make copper in the leachate exist as cuprous ions finally; (2) precipitating the obtained cuprous chloride solution with limestone so as to make copper in the solution precipitate as cuprous oxide; (3) adding sulfuric acid into the filtrate so as to regenerate hydrochloric acid and generate the byproduct calcium sulfate; (4) mixing cuprous oxide with a reducing agent well and adding a covering agent for reduction smelting, thus obtaining blister copper. In the invention, the process of precipitating cuprous oxide from a cuprous chloride solution is simple, and the copper recovery rate is high. Not only is the production cost substantially reduced, but also the process of cuprous oxide reduction smelting has high efficiency. The method of the invention can produce copper ingots as the product but has low requirements for production equipment, and the hydrochloric acid can be regenerated.

Description

technical field [0001] The present invention relates to a copper smelting method, in particular to a copper smelting method for recovering copper from a cuprous chloride solution obtained by leaching copper sulfide concentrate with chlorination, that is, using limestone as a precipitating agent to convert cuprous chloride into The invention relates to cuprous oxide and a method for producing blister copper by reduction smelting of cuprous oxide, belonging to the technical field of copper metallurgy. Background technique [0002] With the development of the copper smelting industry, countries around the world, including my country, have increasingly stringent requirements on the environmental protection of the pyrometallurgical copper smelting process. The traditional smelting methods represented by reverberatory furnace, blast furnace and electric furnace smelting process to treat copper sulfide concentrate have serious defects in energy consumption and environmental protect...

Claims

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Application Information

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IPC IPC(8): C22B3/10C22B3/46C22B15/00
CPCY02P10/20
Inventor 王德全李辉李淑梅张福生刘岩刘凯华
Owner SHENYANG RES INST OF NONFERROUS METALS
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