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

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...

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

Images