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Method for electrolytic refining in fire refining of cathode copper

An electrolytic refining and pyrometallurgical copper smelting technology, applied in the field of copper electrolytic refining, can solve the problems of incomplete electrolyte purification, reduced production cost, low production efficiency, etc., and achieves improvement of edge dendrite effect, reduced production cost and low cost Effect

Inactive Publication Date: 2012-04-18
NINGBO LANDING ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to control the temperature of the electrolyte at 58°C to 62°C in the prior art, the production efficiency is low, and the purification of the electrolyte is not complete enough, and provides an electr

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  • Method for electrolytic refining in fire refining of cathode copper

Examples

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Embodiment 1

[0025] A kind of cathode copper fire method copper electrolytic refining method of the present embodiment, its steps are:

[0026] (1) Electrolytic refining:

[0027] The copper anode plate is used as the anode plate, and the composition of the anode plate is shown in Table 1. The stainless steel plated with 1.3m thick copper on the surface is the cathode plate. The stainless steel in this embodiment is 316L stainless steel. In the tank, direct current is applied, the anode is continuously dissolved, and electrolytic copper is precipitated on the cathode; during the electrolysis process, the selenium and tellurium elements in the anode copper enter the anode slime, deposit at the bottom of the electrolytic tank, and are discharged regularly, and sent to the anode slime workshop to extract precious metals. in,

[0028] A. The composition of the electrolyte is: H 2 SO 4 : 195g / L, Cu 2+ : 75g / L, casein: 23mg / L, thiourea: 18g / L, polyacrylamide: 6g / L, formic acid: 7g / L, imidazo...

Embodiment 2

[0037] A method for cathode copper pyrometallurgy and electrolytic refining of copper, the steps of which are:

[0038] (1) Electrolytic refining:

[0039] With the copper anode plate as the anode plate, the composition of the anode plate is the same as in Example 1, and the stainless steel plated with 1.2mm thick copper on the surface is the cathode plate. The stainless steel in this embodiment is 409 stainless steel, and the anode plate and the cathode plate are arranged alternately in the electrolytic In the tank, direct current is applied, the anode is continuously dissolved, and electrolytic copper is precipitated on the cathode; during the electrolysis process, the selenium and tellurium elements in the anode copper enter the anode slime, deposit at the bottom of the electrolytic tank, and are discharged regularly, and sent to the anode slime workshop to extract precious metals. in,

[0040] A. The composition of the electrolyte is: H 2 SO 4 : 200g / L, Cu2+ : 65g / L, ca...

Embodiment 3

[0047] A kind of cathode copper fire method copper electrolytic refining method of the present embodiment, its steps are:

[0048] (1) Electrolytic refining:

[0049] With the copper anode plate as the anode plate, the composition of the anode plate is the same as in Example 1, and the stainless steel plated with 1.5mm thick copper on the surface is the cathode plate. The stainless steel in this embodiment is 409 stainless steel, and the anode plate and the cathode plate are arranged alternately in the electrolytic In the tank, direct current is applied, the anode is continuously dissolved, and electrolytic copper is precipitated on the cathode; during the electrolysis process, the selenium and tellurium elements in the anode copper enter the anode slime, deposit at the bottom of the electrolytic tank, and are discharged regularly, and sent to the anode slime workshop to extract precious metals. in,

[0050] A. The composition of the electrolyte is: H 2 SO 4 : 190g / L, Cu 2...

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Abstract

The invention discloses a method for electrolytic refining in the fire refining of cathode copper. The method comprises the following steps of: performing electrolysis by taking a copper anode plate as an anode plate and stainless steel of which the surface is plated with copper with the thickness of between 1.2 and 1.5 millimeters as a cathode plate; adding nonvalent iron and sulfur dioxide which serve as reducing agents into copper electrolyte, performing reduction reaction at the temperature of between 40 and 48 DEG C, filtering, evaporating and crystallizing copper sulfate and nickel sulfate, filtering to obtain purified electrolyte, and adding the purified electrolyte into an electrolytic cell to allow the electrolyte to return to an electrolytic system, wherein quinquevalent arsenic is reduced to trivalent arsenic fully under the addition of the reducing agents. The method has the advantages that: the temperature of the electrolyte is between 23 and 25 DEG C; the steam consumption is reduced greatly; the electrolytic efficiency is high; and the production cost is reduced greatly.

Description

technical field [0001] The invention relates to the field of copper electrolytic refining, and more specifically, relates to a method for copper electrolytic refining by cathode copper pyrometallurgy. Background technique [0002] At present, the main problems faced by my country's copper industry are: first, the shortage of copper resources. As the largest copper consumer in the world, the shortage of copper resources is still relatively prominent. With the continuous transfer of international manufacturing to my country in recent years, domestic copper products Demand is rising steadily, and copper raw materials and copper products will still rely heavily on imports. In the short term, the sharp decline in imports of copper products, especially general trade imports, will exacerbate the contradiction between supply and demand of domestic copper products; the second is energy and environmental protection issues. The continuous rise will inevitably stimulate the expansion of d...

Claims

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Application Information

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IPC IPC(8): C25C1/12
CPCY02P10/20
Inventor 李信
Owner NINGBO LANDING ELECTRONICS TECH