Preparation method of Al-based Pb-WC-CeO2 inert composite anode material

An inert composite anode, pb-wc-ceo2 technology, applied in metal material coating process, electrodes, coatings, etc., can solve the problems of easy passivation of titanium-based electrodes, reduced electrical conductivity, high price, etc., to achieve improved Corrosion resistance, weight reduction, pollution reduction effects

Inactive Publication Date: 2011-02-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of anode can solve the problem of lead ions entering the solution to improve the quality of electrolytic zinc, titanium-based electrodes without an intermediate layer are difficult to mass-produce due to factors such as easy passivation of titanium, short life, reduced electrical conductivity, and high price. and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Use industrial alkaline degreaser (composed of: trisodium phosphate (Na 3 PO 4 ) 40g / L, sodium silicate (Na 2 SiO 3 ) 15g / L, temperature 50°C, time 1-3 minutes) degrease the aluminum plate (aluminum alloy), and then blast it with quartz sand;

[0027] 2. Carry out two galvanizing:

[0028] ① Configuration of zinc dipping solution: sodium hydroxide (NaOH) 200g / L, zinc oxide (ZnO) 20g / L, potassium sodium tartrate (KOCO (CHOH) 2 COONa) 50g / L, ferric chloride (FeCl 3 ) 2g / L, sodium nitrate (NaNO 3 )2g / L, mix them;

[0029] ②Primary galvanizing: Alkaline etching of the aluminum plate with 20g / L sodium hydroxide and 2g / L sodium carbonate, then washing with water, drying, and acid etching with 10ml / L hydrofluoric acid, 224g / L nitric acid, and 715g / L phosphoric acid , after washing and drying, perform a zinc dip for 1 to 2 minutes;

[0030] ③Secondary galvanizing: After the first galvanizing, the aluminum plate is washed with water, dried, and put into 50% nitric aci...

Embodiment 2

[0038] 1 to 4 steps are identical with embodiment 1, and the plating solution in 4 steps is configured as: lead acetate (Pb(AC) 2 ) 230g / L, fluoroboric acid (HBF 4 ) 180g / L, boric acid (H 3 BO 3 ) 20g / L, additive gelatin (C 102 h 151 o 39 N 31 ) 1g / L, cationic active agent cetyltrimethylammonium bromide (C 19 h 42 NBr) 0.5g / L, WC 30g / L, CeO 2 20g / L. Obtained Al-based Pb-WC-CeO 2 The composite anode material has a coating thickness of 120-150 μm, a tungsten carbide content of 6.25-6.57%, and a cerium oxide content of 1.32-1.41%.

Embodiment 3

[0040] 1 to 4 steps are identical with embodiment 1, and the plating solution in 4 steps is configured as: lead acetate (Pb(AC) 2 ) 250g / L, fluoroboric acid (HBF 4 ) 200g / L, boric acid (H 3 BO 3 ) 20g / L, additive gelatin (C 102 h 151 o 39 N 31 )3g / L, cationic active agent cetyltrimethylammonium bromide (C 19 h 42 NBr) 1g / L, WC 50g / L, CeO 2 30g / L. Obtained Al-based Pb-WC-CeO 2 The composite anode material has a coating thickness of 160-200 μm, a tungsten carbide content of 8.77-10.46%, and a cerium oxide content of 1.53-1.64%.

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Abstract

The invention relates to a preparation method of Al-based Pb-WC-CeO2 inert composite anode material. The Al (aluminium alloy) -based Pb-WC-CeO2 inert composite anode material which is doped with micron tungsten carbide (WC) and nano ceric oxide particles is prepared by methods of chemical plating and composite plating. The anode material takes on gray black on the surface and has the plating thickness of 100-200mu m. Compared with the traditional lead and lead-based alloy anode, the composite anode material increases the surface roughness so as to enlarge the specific surface area, and improves the using efficiency of the anode; when being used for non-ferrous metal electrowinning, the electrode material reduces the bath voltage by 0.2-0.4V, improves the current efficiency by 1.5-2.5% and effectively reduces the power consumption; meanwhile, the anodic dissolution speed is slowed down by half, so that the pollution for cathode products caused by anodic lead dissolution is effectively reduced; and the invention is added with tungsten carbide particles with good electro-catalysis activity and electrical conductivity, thus not only guaranteeing the performance of material, but also improving the hardness and the wear resistance of an anode plate and enhancing the mechanical strength.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to an Al-based Pb-WC-CeO 2 Preparation method of inert composite anode material. Background technique [0002] In modern wet extraction of metals (eg zinc, manganese, cobalt, nickel, copper, chromium, etc.), the key issues are energy consumption and the purity of the cathode product. Commonly used anode materials mainly include magnetic iron oxide, graphite, lead and lead-based alloys, lead dioxide, platinum and platinum group metal oxides, platinum plating, etc., but these materials have the following problems: difficult preparation, poor corrosion resistance, mechanical strength Low, low current efficiency, high energy consumption, expensive and other defects. [0003] There are two main types of current research and use: [0004] 1. Lead and lead-based alloy anodes [0005] Due to the advantages of cheap price, easy forming, and strong self-healing power, this type of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/12C25D3/34C23C2/06C25C7/02
Inventor 陈阵郭忠诚武剑余强
Owner KUNMING UNIV OF SCI & TECH
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