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A porous aluminum-based composite anode used for a hydrometallurgy electrodeposition process and a preparing method

A composite anode and hydrometallurgy technology, applied in the direction of electrode, metal material coating process, electrolysis process, etc., can solve the problems of complex, difficult long-term combination process of aluminum matrix and lead alloy surface, and achieve the effect of expanding size

Active Publication Date: 2015-07-08
KUNMING HENDERA 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 aluminum-based lead composite anode developed in the prior art that the aluminum matrix and the lead alloy surface layer are difficult to combine for a long time and the process is complicated, the inventors have repeatedly studied and invented a porous aluminum-based anode for the hydrometallurgical electrodeposition process. Composite lead anode preparation method

Method used

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  • A porous aluminum-based composite anode used for a hydrometallurgy electrodeposition process and a preparing method
  • A porous aluminum-based composite anode used for a hydrometallurgy electrodeposition process and a preparing method
  • A porous aluminum-based composite anode used for a hydrometallurgy electrodeposition process and a preparing method

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Embodiment 1

[0048] Example 1 Preparation of porous aluminum-based anode for zinc electrowinning

[0049] A porous aluminum-based composite anode for a hydrometallurgical electrodeposition process, the composite anode substrate is an aluminum alloy with a "three-dimensional through-hole structure", and on the hole wall of the "three-dimensional through-hole structure" of the aluminum alloy substrate (100) And the surface of the aluminum alloy substrate is provided with a cladding layer, the cladding layer is composed of a lead-silver alloy inner layer (201) and a lead alloy outer layer (301) for a mature lead anode used in hydrometallurgical electrowinning process; the aluminum alloy substrate The size of the through hole (101) in the "three-dimensional through-hole structure" is 4-6mm, and the porosity of the aluminum alloy matrix is ​​60%; the thickness of the inner lead-silver alloy in the cladding layer is 0.3mm, and the thickness of the outer lead alloy 1mm; the mass percentage of sil...

Embodiment 2

[0070] Example 2 Preparation of Porous Aluminum-Based Anode for Copper Electrowinning

[0071] A porous aluminum-based composite anode for a hydrometallurgical electrodeposition process, the composite anode substrate is an aluminum alloy with a "three-dimensional through-hole structure", and on the hole wall of the "three-dimensional through-hole structure" of the aluminum alloy substrate (100) And the surface of the aluminum alloy substrate is provided with a cladding layer, the cladding layer is composed of a lead-silver alloy inner layer (201) and a lead alloy outer layer (301) for a mature lead anode used in hydrometallurgical electrowinning process; the aluminum alloy substrate The size of the through hole (101) in the "three-dimensional through-hole structure" is 5-8mm, and the porosity of the aluminum alloy matrix is ​​70%; the thickness of the inner lead-silver alloy in the cladding layer is 0.3mm, and the thickness of the outer lead alloy 1.2mm; the mass percentage of...

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Abstract

A porous aluminum-based composite anode used for a hydrometallurgy electrodeposition process and a preparing method are disclosed. A substrate of the anode is an aluminum alloy having a three-dimensional through-hole structure. A coating layer is disposed on pore walls of the aluminum alloy substrate having the three-dimensional through-hole structure and the surface of the aluminum alloy substrate, and comprises a lead-silver alloy inner layer and a lead alloy outer layer used for fully-developed lead anodes for hydrometallurgy electrodeposition processes. The preparing method includes following three steps: pretreating the porous aluminum substrate, attaching a lead-silver alloy bottom layer to the porous aluminum substrate and performing after-treatment. The porous aluminum-based composite anode prepared by the method is low in overpotential of oxygen evolution, good in electrical conductivity and good in creep resistance. Cathode products produced by adopting the anode are high in quality. The cost of raw materials for manufacturing the anode is low. In addition, a manufacturing process route for the anode is simple, and can be used for large-scale industrial production of the anode.

Description

technical field [0001] The invention relates to a preparation method of a porous metal composite material, in particular to a porous aluminum-based composite anode used in a hydrometallurgical electrodeposition process and a preparation method thereof, belonging to the technical fields of metal material preparation and hydrometallurgy. Background technique [0002] Because hydrometallurgy has the advantages of high comprehensive resource utilization rate, environmental protection process and strong adaptability to low-grade ore, the share of Cu, Zn, Ni, Co, Cd, Mn and other non-ferrous metals extracted by wet method is gradually increasing. Electrodeposition is an important process in the process of extracting non-ferrous metals by hydrometallurgy. At present, insoluble Pb alloys are mostly used as anodes in industry, but due to the high lead density, low electrical conductivity and low tensile strength, the anodes are used Defects such as creep, large anode voltage drop, an...

Claims

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Application Information

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IPC IPC(8): C25C7/02C22C21/02B22D23/04C23C18/52
Inventor 周向阳杨娟王辉刘宏专杨焘马驰原
Owner KUNMING HENDERA SCI & TECH