Inert alloy anode for electrolytic aluminum and preparation method thereof

An inert alloy and electrolytic aluminum technology, applied in the field of electrolytic aluminum industry, can solve the problems of alloy anode consumption, poor corrosion resistance, and low oxidation resistance, and achieve the effects of low power consumption, not easy to fall off, and low cost

Active Publication Date: 2017-11-24
古宝军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The second technical problem to be solved by the present invention is that the oxide film on the surface of the alloy anode in the prior art has low oxidation resistance and is easy to fall off, resulting in continuous consumption of the alloy anode, poor corrosion resistance, and oxide film that corrodes or falls off Entering the liquid aluminum reduces the purity of the final product aluminum; and then proposes an oxide film formed on the surface that has strong oxidation resistance and is not easy to fall off, thereby improving its corrosion resistance and product aluminum purity. The inert alloy anode for electrolytic aluminum and its preparation method

Method used

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  • Inert alloy anode for electrolytic aluminum and preparation method thereof
  • Inert alloy anode for electrolytic aluminum and preparation method thereof

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Embodiment 1

[0032] 40.01 parts by weight of Fe metal blocks, 35.9 parts by weight of Cu metal blocks and 0.19 parts by weight of Sn metal blocks are melted and mixed uniformly under high-speed electromagnetic stirring, quickly cast, and rapidly cooled at a speed of 20-100°C / s to obtain a texture Uniform inert alloy anode1. The density of the inert alloy anode is 8.2g / cm 3 , the specific resistance is 61μΩ·cm, and the melting point is 1400°C.

Embodiment 2

[0034] Melt 80 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks and 0.01 parts by weight of Sn metal blocks, mix them uniformly under high-speed electromagnetic stirring, quickly cast, and rapidly cool at a speed of 20-100°C / s to obtain the texture Uniform inert alloy anode2. The density of the inert alloy anode is 7.5g / cm 3 , the specific resistance is 82μΩ·cm, and the melting point is 1369°C.

Embodiment 3

[0036] Melt 60 parts by weight of Fe metal block, 25 parts by weight of Cu metal block and 0.1 part by weight of Sn metal block, mix them uniformly under high-speed electromagnetic stirring, cast quickly, and cool quickly at a speed of 20-100°C / s to obtain the texture Uniform inert alloy anode3. The density of the inert alloy anode is 7.9g / cm 3 , the specific resistance is 84μΩ·cm, and the melting point is 1390°C.

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Abstract

The invention discloses an inert alloy anode for electrolytic aluminum, which has Fe and Cu as main components, and also includes Sn. The addition of Sn metal helps to form a layer on the surface of the inert alloy anode with strong oxidation resistance and stable structure The oxide film helps to improve the corrosion resistance of the anode; on this basis, the components of the inert alloy anode also include Ni, Al and Y. The addition of Al metal can prevent the main metal components from being oxidized, and the addition of Y metal The alloy can be controlled to present the required crystal form during the preparation process to achieve the purpose of anti-oxidation. The above-mentioned inert alloy anode with Fe and Cu as main components has low overvoltage, high conductivity and low cost, and is suitable for electrolytic aluminum industry.

Description

technical field [0001] The invention relates to an inert alloy anode for electrolytic aluminum and a preparation method thereof, belonging to the field of electrolytic aluminum industry. Background technique [0002] Electrolytic aluminum is obtained by electrolytic alumina. In the prior art, the electrolytic aluminum usually adopts the traditional Hall-Heroult molten salt electrolytic aluminum process, which adopts the cryolite-alumina molten salt electrolysis method, which uses cryolite Na 3 AlF 6 The fluoride salt melt is used as a flux, and the Al 2 o 3 Dissolved in fluoride salt, with carbon body as anode and aluminum liquid as cathode, after passing through a strong direct current, under the high temperature condition of 940-960°C, electrochemical reaction is carried out at the two poles of the electrolytic cell to obtain electrolytic aluminum . In the traditional electrolytic aluminum process, the carbon anode is continuously consumed during the electrolysis proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/16C22C19/03C22C30/04C25C3/12
Inventor 孙松涛方玉林
Owner 古宝军
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