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Alloy material suitable for inert anode of metal fused-salt electrolysis cell

A technology of alloy materials and molten salt electrolysis, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems that cannot meet the requirements of industrial applications

Inactive Publication Date: 2010-06-02
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Although extensive and in-depth research and exploration have been carried out on inert anode materials aimed at replacing carbon anodes, none of them can meet the requirements of industrial applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The preparation method adopted for the metal alloy of the present invention includes alloy smelting method and powder metallurgy, and subsequent heat treatment and plastic deformation, such as rolling, extrusion and forging. The best way to prepare metal alloys is to conduct intermediate frequency induction melting in a vacuum environment, directly cast into semi-finished products, and form inert anode products after a little processing; or cast into ingots and then perform heat treatment and plastic deformation, such as rolling and forging. The alloy material has excellent electrical conductivity and good connection performance, and is suitable for brazing, mechanical connection and bonding.

[0030] The metal alloy of the present invention can use commercial alloys, intermediate alloys or various metals as raw materials, and after repeated remelting, finally obtains a fine grain structure and reduces segregation of elemental components. The alloy has good high tempera...

Embodiment 1

[0037] An alloy material suitable for the inert anode of the metal molten salt electrolytic cell, the mass composition of the alloy is: 10% nickel, 12% aluminum, 15% iron, 2% manganese, 1.0% vanadium, 0.1% niobium , 0.05% cerium, the rest is copper. Using a ceramic crucible, the alloy is melted in a vacuum induction furnace at a temperature range of 1200-1400 ° C, and then cooled and cast by a water-cooled mold. The raw material consists of commercial alloys and master alloys, such as C61400 and C63000, and master alloys of Ni, Fe and Al. After heat treatment, the cast ingot is cut into small discs with a diameter of 25mm and a thickness of 30mm, and the density of the small discs is more than 98% of the theoretical density. The high temperature oxidation resistance test was carried out at 850°C, and the oxidation time was 200-300 hours. The results showed that the oxidation weight gain rate of the alloy was less than 0.01mg / cm 2 h.

Embodiment 2

[0039] An alloy material suitable for the inert anode of the metal molten salt electrolytic cell, the alloy mass composition is: 25% nickel, 8% aluminum, 3% iron, 1.0% tin, 0.5% silver, 0.05% lanthanum, The rest is copper. The silicon carbide graphite crucible is used, and the alloy is melted in a vacuum induction furnace at a temperature range of 1300-1500 ° C, and then cooled and cast by a water-cooled mold. The raw materials are composed of commercial alloys, master alloys or metal elements, such as C70600 and C71500, and master alloys such as Cu-Ni or Ni, Cu-Fe or Fe, Cu-Al or Al and Cu-RE. Electrolytic tests show that the alloy has greatly improved oxide film adhesion and robustness and anti-interference to temperature fluctuations.

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Abstract

The invention relates to an alloy material suitable for an inert anode of a metal fused-salt electrolysis cell, relating to metal fused-salt electrolysis, in particular to a carbon-free metal-base alloy inert anode of an aluminium electrolysis cell. The carbon-free metal-base alloy inert anode of the aluminium electrolysis cell is characterized in that the alloy material comprises the following components in percentage by weight: 5-30% of Ni, 5-20% of Al, and the balance of Cu. The alloy material suitable for the inert anode of the metal fused-salt electrolysis cell is suitable for a lower-temperature (700 DEG C-850 DEG C) electrolyte system; in addition, the alloy inert anode has good high-temperature oxidation resistance and electrolyte corrosion resistance in the electrolytic processes, and electrolyzed aluminium products reach the quality more than 99.7 percent.

Description

technical field [0001] The invention relates to an alloy material suitable for an inert anode of a metal molten salt electrolytic cell, relates to a metal molten salt electrolysis, and is especially suitable for a carbon-free, metal-based alloy inert anode of an aluminum electrolytic cell. Background technique [0002] As a light metal, the application of aluminum and its alloys is of great significance to global energy conservation. However, in order to pursue the sustainable development of the primary aluminum electrolysis production process, huge energy consumption and serious environmental pollution are problems that need to be solved urgently. [0003] Currently, consumable carbon anodes are widely used in many metallurgical molten salt electrolysis industries, such as the smelting of aluminum and rare earth metals. Compared with the traditional carbon anode, the development of inert anode material and inert anode technology can significantly save energy in the producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/12C25C3/00
CPCC22C9/06C25C7/025C25C3/12C22C30/02C22C9/01
Inventor 杨建红李旺兴彭伟平
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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