Method of directly melting and molding scrap copper to extract copper by electrolysis

A technology of electrolytic extraction and waste miscellaneous copper, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of shortening the production process, low metal recovery rate, and high environmental protection pressure, so as to improve the comprehensive recovery capacity and shorten the production process. Technological process, the effect of improving the level of environmental protection

Inactive Publication Date: 2015-01-14
天津中色再生金属工程技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the disadvantages of long production process, low metal recovery rate, high environmental protection pressure and high production cost in the existing scrap copper recycling industry, the purpose of the invention is to overcome the deficiencies of the existing technology and aim at high production cost and metal recovery To solve the problem of low efficiency, provide a method for direct production of standard cathode copper by melting and molding waste miscellaneous copper, realize shortening the production process, improve recovery rate, reduce energy consumption, improve utilization level, reduce environmental pollution, and then reduce the production cost of processing plants

Method used

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  • Method of directly melting and molding scrap copper to extract copper by electrolysis

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Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: raw material is 92% miscellaneous copper

[0028] 1. Melt the miscellaneous copper and cast it into a rectangular hole, and use the copper conductive rod as the anode, and the thin copper sheet as the cathode;

[0029] cast anode components

[0030]

[0031] 2. Prepare the electrolyte solution with copper sulfate, sulfuric acid and hydrochloric acid and add it to the electrolytic cell. The electrolyte composition: the concentration of copper sulfate is 53 g / L, the concentration of sulfuric acid is 170 g / L, and the concentration of hydrochloric acid is 0.06 g / L, so as to keep the composition of the electrolyte stable;

[0032] 3. The temperature of the electrolyte is controlled at 62°C;

[0033] 4. The cathode current density is 200A / m3, and the concentration range of copper ions, chloride ions and sulfuric acid in the electrolyte is maintained during the production process;

[0034] 5. Add 300 g / ton of bone glue to precipitate copper, and 30 g / ton o...

Embodiment 2

[0038] Embodiment two: raw material is the miscellaneous copper copper rice that contains copper 94%.

[0039] 1. The mixed copper copper rice is melted and cast into an anode plate as the anode, and a thin copper sheet as the cathode.

[0040] The cast anode composition is:

[0041]

[0042] 2. Prepare the electrolyte composition: copper ion 50 g / L, sulfuric acid 180 g / L, chloride ion 0.05 g / L, add hydrochloric acid to maintain the chloride ion concentration;

[0043] 3. The temperature of the electrolyte is controlled at 62°C;

[0044] 4. The cathode current density is 240A / m3, and the concentration range of copper ions, chloride ions and sulfuric acid in the electrolyte is maintained during the production process;

[0045] 5. Add additive bone glue 200 g / ton to precipitate copper, thiourea 20 g / ton to precipitate copper.

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Abstract

The invention provides a method of directly melting and molding scrap copper to extract copper by electrolysis. The method comprises the following steps: 1) directly melting and molding scrap copper with copper content of over 60% into an anode and taking a pure copper thin sheet as a cathode; 2) using copper sulfate, sulfuric acid and hydrochloric acid to prepare electrolyte adding the electrolyte into an electrolytic cell, wherein the electrolyte comprises the following components: 45-60g / L copper sulfate, 160-200g / L sulfuric acid, 0.04-0.08g / L hydrochloric acid and the balance of water; 3) switching on direct current for the electrolytic cell to perform electrolysis, wherein the process conditions for electrolysis are as follows: electrolyte temperature of 55-65 DEG C and cathode current density of 150-260A / m<2>. The scrap copper applicable to the method comprises the following components in percentage by weight: 60-99.5% of copper, 0-10% of lead, 0-5% of nickel, 0-3% of iron, 0-3% of iron, 0-3% of tin and 0-10% of zinc. The method disclosed by the invention can be used for solving the problem that the existing production process is long in process flow, low in recovery rate, high in energy consumption and low in utilization level and causes serious environmental pollution. The method abandons smelting processes such as oxidizing and reducing used in the existing process and has the advantages of a high recovery rate, low cost, a short production period, capacity of relieving environmental pollution, and the like.

Description

technical field [0001] The present invention relates to waste miscellaneous copper regeneration and refining metallurgical technology, particularly relates to a kind of waste miscellaneous copper melting molding direct electrolytic extraction copper method, utilizes this method to use the waste miscellaneous copper to directly melt and form as the anode, can produce the standard cathode copper directly by electrolysis. Background technique [0002] 1. At present, my country's copper ore resources are in short supply, and a large amount of copper concentrate is needed to meet the needs of national economic development. According to the statistics of authoritative organizations, in 2013, China produced 6.84 million tons of copper, but the self-produced copper concentrate produced 1.596 million tons of copper, and the copper concentrate required for copper smelting mainly relies on imports. While importing copper concentrate, my country also imports a large amount of scrap c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/12
CPCC25C1/12Y02P10/20
Inventor 毛允正李英念卢斗江王金祥贾久喜金铎屹董海涛李树学
Owner 天津中色再生金属工程技术研究院
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