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A stainless steel-based β-pbo 2 -mno 2 - CEO 2 -zro 2 Preparation method of inert composite anode material

A technology of -pbo2-mno2-ceo2-zro2, inert composite anode, applied in the direction of electrolytic inorganic material coating, electrodes, electrolytic components, etc., to achieve the effect of increasing surface roughness, improving use efficiency and reducing energy consumption

Active Publication Date: 2020-12-08
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of the lead dioxide composite electrode in the prior art, the present invention provides a stainless steel-based β-PbO 2 -MnO 2 -CeO 2 -ZrO 2 Preparation method of inert composite anode material, β-PbO of the present invention 2 -MnO 2 -CeO 2 -ZrO 2 When the inert composite anode is used in the electrowinning of non-ferrous metals, it can effectively reduce and stabilize the cell voltage, and avoid the influence of the anode dissolved matter on the quality of the cathode product after entering the plating solution. It has the advantages of high corrosion resistance, low energy consumption, and high electrocatalytic activity. And the manufacturing cost is low, which can overcome the shortcomings of traditional anodes

Method used

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  • A stainless steel-based β-pbo <sub>2</sub> -mno <sub>2</sub> - CEO <sub>2</sub> -zro <sub>2</sub> Preparation method of inert composite anode material
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  • A stainless steel-based β-pbo <sub>2</sub> -mno <sub>2</sub> - CEO <sub>2</sub> -zro <sub>2</sub> Preparation method of inert composite anode material

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Embodiment 1

[0023] Embodiment 1: A kind of stainless steel base β-PbO 2 -MnO 2 -CeO 2 -ZrO 2 The preparation method of inert composite anode material, concrete steps are as follows:

[0024] (1) Mechanically grind the mesh stainless steel substrate, soak it in an alkaline degreasing agent for 20 minutes at a temperature of 50°C, and then immerse it in a mixed acid system (nitric acid-hydrochloric acid system) for 80 seconds to obtain an activated mesh. shaped stainless steel substrate; the pore size of the mesh stainless steel substrate is 600 μm; the alkaline degreaser contains 40g / L trisodium phosphate (Na 3 PO 4 ) and 15g / L sodium silicate (Na 2 SiO 3 ) mixed aqueous solution; the mass fraction of nitric acid in the nitric acid-hydrochloric acid system is 20%, and the mass fraction of hydrochloric acid is 30%;

[0025] (2) Use the activated mesh stainless steel substrate in step (1) as the anode, and the copper plate as the cathode, at a temperature of 40°C and an anode current ...

Embodiment 2

[0028] Embodiment 2: A kind of stainless steel base β-PbO 2 -MnO 2 -CeO 2 -ZrO 2 The preparation method of inert composite anode material, concrete steps are as follows:

[0029] (1) Mechanically grind the mesh stainless steel substrate, soak it in an alkaline degreaser for 25 minutes at a temperature of 50°C, and then soak it in a mixed acid system (nitric acid-hydrochloric acid system) for 70 seconds to obtain an activated mesh. shaped stainless steel substrate; the pore size of the mesh stainless steel substrate is 700 μm; the alkaline degreaser contains 40g / L trisodium phosphate (Na 3 PO 4 ) and 15g / L sodium silicate (Na 2 SiO 3 ) mixed aqueous solution; the mass fraction of nitric acid in the nitric acid-hydrochloric acid system is 15%, and the mass fraction of hydrochloric acid is 35%;

[0030] (2) With the activated mesh stainless steel substrate in step (1) as the anode and the copper plate as the cathode, at a temperature of 50°C and an anode current density of...

Embodiment 3

[0032] Embodiment 3: A kind of stainless steel base β-PbO 2 -MnO 2 -CeO 2 -ZrO 2 The preparation method of inert composite anode material, concrete steps are as follows:

[0033] (1) Mechanically grind the mesh stainless steel substrate, soak it in an alkaline degreaser for 30 minutes at a temperature of 50°C, and then soak it in a mixed acid system (nitric acid-hydrochloric acid system) for 60 seconds to obtain an activated mesh. shaped stainless steel substrate; the pore size of the mesh stainless steel substrate is 800 μm; the alkaline degreaser contains 40g / L trisodium phosphate (Na 3 PO 4 ) and 15g / L sodium silicate (Na 2 SiO 3 ) mixed aqueous solution; the mass fraction of nitric acid in the nitric acid-hydrochloric acid system is 25%, and the mass fraction of hydrochloric acid is 25%;

[0034] (2) With the activated mesh stainless steel substrate in step (1) as the anode and the copper plate as the cathode, at a temperature of 60°C and an anode current density of...

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Abstract

The invention discloses a preparation method of a stainless steel-based beta-PbO2-MnO2-CeO2-ZrO2 inert composite anode material, and belongs to the technical field of composite anodes. The method comprises the following steps that mechanical grinding and degreasing are carried out on a mesh stainless steel base material, and then the stainless steel base material is soaked into a nitric acid-hydrochloric acid system for etching and activating for 60-80 seconds to obtain an activated mesh stainless steel base; and the activated mesh stainless steel base is taken as an anode, a copper plate is taken as a cathode, electroplating is carried out for 1-2 hours under the conditions of the temperature being 40-60 DEG C, the current density of the anode being 20-40 mA / cm<2> and the stirring rotating speed being 200-250 r / min, and the anode is washed and dried after taken out to obtain the mesh stainless steel-based beta-PbO2-MnO2-CeO2-ZrO2 inert composite anode material. According to the preparation method, the addition of manganese dioxide, zirconium dioxide and the rare earth oxide CeO2 improves the electrocatalytic activity and the corrosion resistance of the electrode material, moreover, the groove voltage is stable, and the power consumption is effectively reduced; the grain growth of lead dioxide is inhibited in the electroplating process, so that the lead dioxide is better refined, the catalytic activity of the anode is greatly improved, and the and the service life of the anode is greatly prolonged; and grains can be refined, so that a coating is more compact, and the corrosion resistance of the anode material can be effectively improved.

Description

technical field [0001] The invention relates to a stainless steel base β-PbO 2 -MnO 2 -CeO 2 -ZrO 2 The invention discloses a method for preparing an inert composite anode material, belonging to the technical field of composite anodes. Background technique [0002] In the process of modern hydrometallurgy (such as: smelting zinc, manganese, cobalt, nickel, copper, chromium, etc.), the key issues to be solved are energy consumption and the purity of cathode products. Magnetic iron oxide, graphite, lead and lead-based alloys, lead dioxide, platinum and platinum group metal oxides, platinum plating, etc. are often used as the main anode materials, but these materials have: difficult preparation, poor corrosion resistance, mechanical strength Low, low current efficiency, high energy consumption, expensive and other defects. [0003] At present, the main researches are lead and lead-based alloy anodes and titanium-based stable anodes. Among them, the advantages of lead and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C7/02C25D9/06C25D7/00
CPCC25C7/02C25D7/00C25D9/06
Inventor 陈阵郑涛余强朱薇桂来宋钰珠
Owner KUNMING UNIV OF SCI & TECH
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