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A preparation method of gradient composite anode for electrowinning of non-ferrous metals

A composite anode, non-ferrous metal technology, applied in the field of electrochemistry, can solve the problems of the deposition layer and the surface of the electrode are not tightly combined, the deposition layer is uneven, the deposition layer is easy to peel off, etc., to reduce cracks, increase the amount of deposition, and improve the service life Effect

Active Publication Date: 2016-11-16
KUNMING HENDERA SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the PbO produced by electroplating in this way 2 As an insoluble anode, the electrode will have the following problems in use: (1) PbO 2 The deposition layer is not tightly combined with the electrode surface or the deposition layer is uneven; (2) PbO 2 The deposited layer is porous and rough, with large internal stress; (3) PbO 2 The deposited layer is easy to peel off or corrode, and the service life is not long

Method used

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  • A preparation method of gradient composite anode for electrowinning of non-ferrous metals
  • A preparation method of gradient composite anode for electrowinning of non-ferrous metals
  • A preparation method of gradient composite anode for electrowinning of non-ferrous metals

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Embodiment 1

[0029] Embodiment 1: A kind of preparation method of gradient composite anode for electrowinning of nonferrous metals, the method is carried out according to the following steps:

[0030] The titanium rod 1 is prepared by the drawing and extrusion process, and a group of horizontal titanium rods are connected with three titanium-copper-clad vertical rods 2 to assemble as shown in FIG. figure 1 For the fence-type titanium plate substrate shown, put the substrate into boiling sodium hydroxide solution with a mass volume ratio of 10% and boil for 0.5h, rinse with water, and put in HCl:HF:HNO 3 Soak in a mixed acid solution with a volume ratio of 5:1:2 for 3 to 5 minutes, rinse with water, boil in a 20% HCl solution for 0.5 hours, wash with deionized water, dry with hot air, and set aside; titanium The rod is a round heterogeneous toothed cylindrical titanium rod, and its cross-sectional shape is as follows Figure 4For the circular heterogeneous tooth type shown, the maximum o...

Embodiment 2

[0035] Embodiment 2: A kind of preparation method of gradient composite anode for non-ferrous metal electrowinning, concrete operation is as follows:

[0036] The titanium rod 1 is prepared by the drawing and extrusion process, and a group of horizontal titanium rods are connected with three titanium-copper-clad vertical rods 2 to assemble as shown in FIG. figure 1 For the fence-type titanium plate substrate shown, put the substrate into boiling sodium hydroxide solution with a mass volume ratio of 10% and boil for 0.5h, rinse with water, and put in HCl:HF:HNO 3 Soak in a mixed acid solution with a volume ratio of 5:1:2 for 3 to 5 minutes, rinse with water, boil in a 20% HCl solution for 0.5 hours, wash with deionized water, dry with hot air, and set aside; titanium The rod is a round heterogeneous toothed cylindrical titanium rod, and its cross-sectional shape is as follows Figure 5 For the elliptical heterogeneous tooth type shown, the maximum outer diameter, that is, th...

Embodiment 3

[0041] Embodiment 3: a kind of preparation method of gradient composite anode for electrowinning of non-ferrous metals, the specific method is as follows:

[0042] The titanium rod 1 is prepared by the drawing and extrusion process, and a group of horizontal titanium rods are connected with three titanium-copper-clad vertical rods 2 to assemble as shown in FIG. figure 1 For the fence-type titanium plate substrate shown, put the substrate into boiling sodium hydroxide solution with a mass volume ratio of 10% and boil for 0.5h, rinse with water, and put in HCl:HF:HNO 3 Soak in a mixed acid solution with a volume ratio of 5:1:2 for 3 to 4 minutes, then rinse with water and boil in a 20% HCl solution for 0.5 hours, wash with deionized water, dry with hot air, and set aside; titanium The rod is a round zigzag cylindrical titanium rod, and its cross-sectional shape is as follows: Figure 6 The circular sawtooth shape shown, the maximum outer diameter of the titanium rod is 12mm, ...

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Abstract

The invention discloses a preparation method of a gradient composite anode for nonferrous metals electrodeposition. The method comprises the following steps: preparing titanium bars by a drawing extrusion process; connecting a group of transverse titanium bars and three copper-coated titanium vertical bars to assemble into a fence-type titanium plate substrate; removing oil and carrying out activating treatment on the substrate by a chemical method, and preparing a nano-polyaniline-doped tin-antimony oxide by a coating method, and then carrying out argon arc welding on a fence-type titanium plate and a copper-coated titanium conductive beam; and respectively preparing an alpha-PbO2 intermediate layer and a molybdenum oxide-doped beta-PbO2 activating layer by an electrochemical codeposition method. The anode prepared by the method is good in electrocatalytic activity, low in cell voltage in electrodeposition, long in service life and low in energy consumption.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a method for preparing an insoluble anode for electrowinning of nonferrous metals in hydrometallurgy. Background technique [0002] In the whole industrial production, the metallurgical industry is still a big energy consumer, and the production energy consumption is high. In the smelting process of non-ferrous metals, more than 90% of zinc and about 30% of copper are extracted by hydrometallurgical technology. Especially in the zinc hydrometallurgy process, the electrowinning process consumes 2 / 3 of the energy consumption of the entire zinc extraction process. And in the process of electrowinning extraction of non-ferrous metals (zinc, copper, manganese, nickel, etc.), the properties of the anode material directly affect the ion discharge potential, the change of the overpotential, the current efficiency, the power consumption, the life of the anode and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C7/02
Inventor 郭忠诚陈步明秦赛娥黄思仁李学龙
Owner KUNMING HENDERA SCI & TECH
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