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Composite lead dioxide anode and preparation method thereof

A technology of lead dioxide and anode, which is applied in the field of electrodes, can solve environmental pollution and other problems, and achieve the effects of good corrosion resistance, high oxygen overvoltage and long life

Inactive Publication Date: 2020-12-18
HUIZHOU ZHENDING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 and preparation method thereof
  • Composite lead dioxide anode and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]The preparation method of the composite lead dioxide anode of this embodiment includes the following preparation steps:

[0033]1). Collect anode slime: collect the anode slime dropped;

[0034]2) Cleaning anode slime: There are usually metal copper, zinc, cobalt, nickel and other crushed powders in anode slime. Put the mixture in a sloping drum anode bag, insert the insoluble anode and energize, and use 200 g / L sulfuric acid as the electrolyte. Rotating the drum, the anode mud rotates in the drum, contacts the anode and conducts electricity, dissolves the copper, zinc, cobalt, nickel and other metal powders in the anode mud, and the dissolved metal ions are separated by extraction and electrolyzed into pure metal, undissolved Dry the lead dioxide powder for use;

[0035]3) Shaping of lead dioxide powder: test lead dioxide powder particles, determine the ball milling process according to the particle size; ball mill the lead dioxide powder in a ball mill, dry, and sieve to obtain 50% o...

Embodiment 2

[0045]The preparation method of the composite lead dioxide anode of this embodiment includes the following preparation steps:

[0046]1). Collect anode slime: collect the anode slime dropped;

[0047]2) Cleaning anode slime: There are usually metal copper, zinc, cobalt, nickel and other crushed powders in anode slime. Put the mixture in a sloping drum anode bag, insert the insoluble anode and energize, and use 200 g / L sulfuric acid as the electrolyte. Rotating the drum, the anode mud rotates in the drum, contacts the anode and conducts electricity, dissolves the copper, zinc, cobalt, nickel and other metal powders in the anode mud, and the dissolved metal ions are separated by extraction and electrolyzed into pure metal, undissolved Dry the lead dioxide powder for use;

[0048]3) Shaping of lead dioxide powder: test lead dioxide powder particles, determine the ball milling process according to the particle size; ball mill the lead dioxide powder in a ball mill, dry, and sieving to obtain 100...

Embodiment 3

[0058]The preparation method of the composite lead dioxide anode of this embodiment includes the following preparation steps:

[0059]1). Collect anode slime: collect the anode slime dropped;

[0060]2) Cleaning anode slime: There are usually metal copper, zinc, cobalt, nickel and other crushed powders in anode slime. Put the mixture in a sloping drum anode bag, insert the insoluble anode and energize, and use 200 g / L sulfuric acid as the electrolyte. Rotating the drum, the anode mud rotates in the drum, contacts the anode and conducts electricity, dissolves the copper, zinc, cobalt, nickel and other metal powders in the anode mud, and the dissolved metal ions are separated by extraction and electrolyzed into pure metal, undissolved Dry the lead dioxide powder for use;

[0061]3) Shaping of lead dioxide powder: test lead dioxide powder particles and determine the ball milling process according to the particle size; ball mill the lead dioxide powder in a ball mill, dry, and sieving to obtain ...

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Abstract

The invention relates to the technical field of electrodes, in particular to a composite lead dioxide anode and a preparation method thereof. The composite lead dioxide anode comprises a supporting material and coatings, the supporting material is foamed lead, the coatings are lead dioxide coatings, and the lead dioxide coatings are arranged on the upper surface and the lower surface of the foamedlead; the preparation method comprises the following preparation 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 performing chloride ion resistance testing. The composite lead dioxide anode is long in service life and high in stability, a compact lead dioxide layer is formed when the composite lead dioxide electrode is used due to the fact that the lead dioxide powder is inserted into the metal lead, the corrosion mechanism is dissolution, the corrosion speed is low, the service life is long, and in the high-current-density electrolysis process, the composite lead dioxide electrode can be stably used for a long period of time.

Description

Technical field[0001]The invention relates to the technical field of electrodes, in particular to a composite lead dioxide anode and a preparation method thereof.Background technique[0002]As we all know, lead oxide-plated metal electrodes are suitable for electrolysis that requires corrosion resistance or high oxygen overvoltage, such as oxygen generation electrolysis, anodic oxidation, electroplating, electrolysis of organic materials, electrolytic treatment of wastewater, etc., and in the electrode Many improvements have been made. However, due to some practical problems, the industrial application of these electrodes still needs improvement. There are two types of lead oxide used for this type of electrode, namely, orthorhombic α-PbO2Tetragonal β-PbO with rutile structure2. Although in α-PbO2When used as an electrolytic anode, it has better corrosion resistance than β-PbO2Poor, but when α-PbO is produced by electrolysis on a metal substrate (such as titanium)2When using electropl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04
Inventor 罗国华顾晓聪刘碧华
Owner HUIZHOU ZHENDING ENVIRONMENTAL PROTECTION TECH CO LTD
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