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Recovery method of a small amount of pure copper attached to stainless steel plate in copper electrolytic refining

A copper electrolytic refining and stainless steel plate technology, which is applied in the direction of electrolysis process, electrolysis components, process efficiency improvement, etc., can solve the problems of pure copper cannot be stripped normally, cathode copper is re-refined, and stainless steel plate damage is large, so as to avoid damage , Simple and convenient operation, and the effect of prolonging the service life

Active Publication Date: 2016-11-09
DAYE NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that in the current production process of permanent cathodic electrolysis in copper electrolytic refining, a small amount of pure copper is attached to the stainless steel plate and the precipitation stops, and the attached pure copper cannot be peeled off normally. Large, and the problem that the stripped cathode copper must be refined again, provide a recovery method for a small amount of pure copper attached to stainless steel plate in copper electrolytic refining

Method used

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  • Recovery method of a small amount of pure copper attached to stainless steel plate in copper electrolytic refining
  • Recovery method of a small amount of pure copper attached to stainless steel plate in copper electrolytic refining

Examples

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Embodiment 1

[0025] In this embodiment, 54 stainless steel plates and 55 crude copper plates with thickness d<2mm attached to one side of pure copper are selected, and the actual production test is carried out in the copper electrolysis workshop of Daye Nonferrous Metals Co., Ltd. The specific conditions are as follows:

[0026] (1) Anti-dissolution: see figure 1 Place the stainless steel plate 1 and the thick copper plate 2 with a pure copper layer on the surface with a thickness d2 , the power-on time is 10 minutes. After the above-mentioned power-on treatment, the surface of the pure copper layer attached to the stainless steel plate 1 is dissolved and activated; note that the pure copper layer cannot be completely dissolved during electrolysis, otherwise it will cause permanent damage to the stainless steel plate;

[0027] (2) Normal electrolysis: see figure 2 , lift the stainless steel plate and thick copper plate with a crane, move the insulating plate 4 on the conductive row 3, so ...

Embodiment 2

[0030] In this embodiment, 54 stainless steel plates and 55 thick copper plates with a thickness of 2mm≤d≤4mm attached to one side of pure copper are selected, and the actual production test is carried out in the copper electrolysis workshop of Daye Nonferrous Metals Co., Ltd. The specific conditions are as follows:

[0031] (1) Anti-dissolution: Place the stainless steel plate and thick copper plate with a single-sided thickness of 2mm≤d≤4mm attached to the pure copper layer on the conductive bar in sequence at a distance of 100mm from the same pole, and lift the stainless steel plate and thick copper plate with a crane , move the insulating plate on the conductive bar, make the stainless steel plate connect to the positive pole, and the thick copper plate connect to the negative pole, and electrify, the current intensity is 300-310A / m 2, the power-on time is 15 minutes. After the above-mentioned power-on treatment, the surface of the pure copper layer attached to the stainles...

Embodiment 3

[0035] In this embodiment, 54 stainless steel plates and 55 crude copper plates with thickness d<2mm attached to one side of pure copper are selected, and the actual production test is carried out in the copper electrolysis workshop of Daye Nonferrous Metals Co., Ltd. The specific conditions are as follows:

[0036] (1) Anti-dissolution: place the stainless steel plate and the thick copper plate with the thickness d2 , the power-on time is 12 minutes. After the above-mentioned power-on treatment, the surface of the pure copper layer attached to the stainless steel plate is dissolved and activated; note that the pure copper layer cannot be completely dissolved during electrolysis, otherwise it will cause permanent damage to the stainless steel plate;

[0037] (2) Normal electrolysis: Lift the stainless steel plate and thick copper plate with a crane, move the insulating plate on the conductive row, connect the stainless steel plate to the negative pole, and the thick copper plate...

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Abstract

The invention relates to a method for recovering a little of pure copper adhered to a stainless steel plate in copper electrolytic refining. The method sequentially comprises the following steps: (1) sequentially putting a stainless steel plate with a little of pure copper adhered to the surface and a thick copper plate on a conductive bar in a staggered manner, moving an insulating plate on the conductive bar, connecting the stainless steel plate and an anode, connecting the thick copper plate and a cathode, electrifying, wherein the current strength is 300-310A / m<2>, and the conduction time is 10-15 minutes, dissolving and activating the pure copper surface adhered to the stainless steel plate; (2) moving the insulating plate on the conductive bar, connecting the stainless steel plate and the cathode, connecting the thick copper plate and the anode, electrifying, wherein the current strength is 300-310A / m<2>, and continuously electrifying to produce for 7-9 days; and (3) transferring the stainless steel plate with high-purity cathode copper into a stripping unit, and stripping to obtain qualified high-purity cathode copper and an intact stainless steel plate. The method disclosed by the invention is simple, and convenient to operate, the problems that a little of pure copper is adhered to a stainless steel cathode plate, and the stainless steel cathode plate cannot be further produced are well solved; a lot of production time is shortened; and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of copper electrolytic refining by permanent cathode method, in particular to a method for recovering a small amount of pure copper attached to a stainless steel plate in copper electrolytic refining. Background technique [0002] At present, the permanent cathodic electrolysis method is often used in copper electrolytic refining at home and abroad to refine pure copper. The difference from conventional electrolysis is that the permanent cathodic method uses 316L stainless steel plate as the cathode and thick copper plate as the anode. The stainless steel plate and thick copper plate are used in the same The distance between the poles is 100mm and they are placed alternately on the conductive bar above the electrolytic cell (that is, the interval between two adjacent stainless steel plates is 100mm, and the interval between two adjacent thick copper plates is also 100mm, and the stainless steel plate and thic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/12C25C7/08
CPCC25C1/12C25C7/08Y02P10/20
Inventor 陈学文徐振谢迎松许卫沈继勇伍刚华乐安胜
Owner DAYE NONFERROUS METALS