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Composite lead dioxide anode of triple structure and preparation method of anode

A technology of lead dioxide and structure treatment, applied in the field of electrodes, can solve the problems of insoluble anode function, short anode life, environmental pollution, etc., achieve huge economic and environmental benefits, slow corrosion speed, and good corrosion resistance Effect

Pending Publication Date: 2021-01-01
HUIZHOU ZHENDING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third failure mode is that an effective lead dioxide film cannot be formed on the surface of the anode, and the lead layer is continuously electrochemically dissolved. In this case, the life of the anode is extremely short and cannot play the role of an insoluble anode
Therefore, it is necessary to consider how to reuse these materials repeatedly, instead of treating them as waste, going to landfill, and causing environmental pollution

Method used

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  • Composite lead dioxide anode of triple structure and preparation method of anode
  • Composite lead dioxide anode of triple structure and preparation method of anode
  • Composite lead dioxide anode of triple structure and preparation method of anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Use lead foam as the matrix for fixing lead dioxide powder. The lead foam is selected with a pore size of 50PPI, a thickness of 5 mm, and a weight per unit area of ​​100 grams per square decimeter. The lead foam is made by polyurethane foam electrolytic lead plating; A titanium mesh with a thickness of 1.5 mm and a pore size of 5 mm × 5 mm was used as the support material.

[0035] The preparation method of the sandwich structure composite lead dioxide anode of the present embodiment comprises the following preparation steps:

[0036] 1) Collect anode slime: collect the anode slime that falls into the electroplating tank when lead dioxide is used as an electrolytic anode;

[0037] 2) Clean the anode slime: put the anode slime in the inclined drum-type anode bag, insert the insoluble anode for electricity, use 200 g / L sulfuric acid as the electrolyte, rotate the drum, the anode slime rotates in the drum, and contacts with the anode to conduct electricity. Dissolve copper,...

Embodiment 2

[0048] Use lead foam as the matrix for fixing lead dioxide powder. The lead foam is selected with a pore size of 50PPI, a thickness of 5 mm, and a weight per unit area of ​​100 grams per square decimeter. The lead foam is made by polyurethane foam electrolytic lead plating; A titanium mesh with a thickness of 3 mm and a pore size of 5 mm × 5 mm was used as the support material.

[0049] The preparation method of the sandwich structure composite lead dioxide anode of the present embodiment comprises the following preparation steps:

[0050] 1) Collect anode slime: collect the anode slime that falls into the electroplating tank when lead dioxide is used as an electrolytic anode;

[0051] 2) Clean the anode slime: put the anode slime in the inclined drum-type anode bag, insert the insoluble anode for electricity, use 200 g / L sulfuric acid as the electrolyte, rotate the drum, the anode slime rotates in the drum, and contacts with the anode to conduct electricity. Dissolve copper,...

Embodiment 3

[0062] Use lead foam as the matrix for fixing lead dioxide powder. The lead foam is selected with a pore size of 50PPI, a thickness of 5 mm, and a weight per unit area of ​​100 grams per square decimeter. The lead foam is made by polyurethane foam electrolytic lead plating; A titanium mesh with a thickness of 5 mm and a pore size of 5 mm × 5 mm was used as the support material.

[0063] The preparation method of the sandwich structure composite lead dioxide anode of the present embodiment comprises the following preparation steps:

[0064] 1) Collect anode slime: collect the anode slime that falls into the electroplating tank when lead dioxide is used as an electrolytic anode;

[0065] 2) Clean the anode slime: put the anode slime in the inclined drum-type anode bag, insert the insoluble anode for electricity, use 200 g / L sulfuric acid as the electrolyte, rotate the drum, the anode slime rotates in the drum, and contacts with the anode to conduct electricity. Dissolve copper,...

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Abstract

The invention relates to the technical field of electrodes, in particular to a composite lead dioxide anode of a triple structure and a preparation method of the composite lead dioxide anode. The composite lead dioxide anode of the three-dimensional structure comprises foamed lead, a lead dioxide plating layer and a titanium mesh, the lead dioxide plating layer is arranged on the surface of the foamed lead, the lead dioxide plating layer and the foamed lead form composite layers, and the titanium mesh is arranged between the two composite layers; the preparation method comprises the followingpreparation steps: collecting anode mud, cleaning the anode mud, shaping lead dioxide powder, carrying out compression molding, shaping a product, testing the service life of an anode, and testing chloride ions. According to the composite lead dioxide anode, the lead dioxide powder is inserted into the metal lead, a compact lead dioxide coating is formed when the composite lead dioxide anode is used, and the lead dioxide coating has small internal strain generated by electroplating, and is long in service life and high in stability.

Description

technical field [0001] The invention relates to the technical field of electrodes, in particular to a composite lead dioxide anode with a sandwich structure and a preparation method thereof. Background technique [0002] As we all know, lead oxide-plated metal electrodes are suitable for electrolysis electrodes that require corrosion resistance or high oxygen overvoltage, such as electrolysis for oxygen generation, anodic oxidation, electroplating, electrolysis of organic materials, electrolytic treatment of wastewater, etc., and in this electrode Many improvements have been made. However, the industrial application of these electrodes has left room for improvement due to some practical problems. There are two types of lead oxide used for such electrodes, namely, orthorhombic α-PbO 2 Tetragonal β-PbO with titanium type (rutile) structure 2 . Although in α-PbO 2 When used as an electrolytic anode, its corrosion resistance is better than that of β-PbO 2 Poor, but when α-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
CPCC02F1/46109C02F2001/46133C02F2001/46152
Inventor 罗国华顾晓聪刘碧华
Owner HUIZHOU ZHENDING ENVIRONMENTAL PROTECTION TECH CO LTD