Method for preparing Al-Si alloy by AD-aluminite powder agent electrolytic process

A technology of aluminum powder and powder, which is applied in the field of electrolytic production of aluminum-silicon multi-component alloys, can solve the problem of high cost and achieve high economic benefits

Inactive Publication Date: 2002-09-04
星野滋郎 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The re-dissolution method is actually secondary melting with energy, and the cost is high; the submerged arc furnace method is smelted from natural bauxite, which often contains Ti metal, and the Ti content in the finished product is high, which limits its use; the electric furnace method is AL-Si alloys with high aluminum content are only obtained in large electric furnaces of 10,000 to 60,000 KWH, and are limited by equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Molten salt electrolysis is carried out in externally heated laboratory electrolyzers. Take 60g (parts) of AD-aluminum powder and drop it in batches. Add 1.13g (1.13 / 60 parts) AD-aluminum powder every 10 minutes, after 40 minutes, add 2.26g (2.26 / 60 parts) AD-aluminum powder every 20 minutes; the process parameter during electrolysis is cryolite molecular ratio 2.5, the electrolyte temperature is 965°C, the current intensity is 15A, and the voltage is 3.8V. After electrolysis for 10 hours, 19.74 g of alloy was obtained. Analysis product AL-Si multi-component, by weight percentage: Al 97.30%, Si 2.02%, Fe 0.55%.

Embodiment 2

[0032] Take 65g of A-aluminum powder, and carry out molten salt electrolysis in an external laboratory electrolyzer. AD-aluminum powder is put in batches. At first every 10 minutes, add 1.13g (1.13 / 65 parts) AD-aluminum powder, after 60 minutes, add 2.26g (2.26 / 65 parts) AD-aluminum powder every 20 minutes. During electrolysis, the process parameters are:

[0033] Cryolite Molecular Ratio: 2.7

[0034] Electrolyte temperature: 970°C

[0035] Current intensity: 16A

[0036] Voltage: 4V

[0037] After electrolysis for 10 hours, 20.01 g of alloy was obtained. Analysis product AL-Si alloy composition, by weight percentage: Al 97.23%, Si 2.12%, Fe 0.57%.

Embodiment 3

[0039] Molten salt electrolysis is carried out in the external laboratory, in the electrolyzer. Take 68g of AD-aluminum powder and drop it in batches. At the beginning, every 10 minutes, drop into 1.13g (1.13 / 68 parts) AD-aluminum powder, after 80 minutes, every 20 minutes, drop into 2.26g (2.26 / 68 parts) AD-aluminum powder. The process parameters during electrolysis are:

[0040] Cryolite Molecular Ratio 2.8

[0041] Electrolyte temperature 980°C

[0042] Current intensity 17A

[0043] Voltage 4.3V

[0044] After electrolysis for 10 hours, 20.04 g of alloy was obtained. Analysis product AL-Si composition, by weight percentage:

[0045] Al 97.37%, Si 2.08%, Fe 0.6%.

[0046] The embodiment proves that when the method of electrolyzing AD-aluminum powder is used to produce an AL-Si multi-component alloy, an alloy with an aluminum content of about 90% can be obtained, which can be used as a master alloy of cast aluminum. When the submerged arc furnace method is used to pr...

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Abstract

The present invention is characterized by that it adopts Na3AlF6 cryolite as electrolyte, the molecular ratir of cryolite in the electrolyte is about 2.3-3.0, and the temperature range of electrolyteis 950-990 deg.C, and AD-aluminium powder agent can be added to the electrolyte in batches. This invention possesses the following advantages: AD-aluminium powder agent-by-product produced in secondary aluminium plant can be circularly used, and its Al-Si alloy possesses higher aluminium content, and can be made into cast alumnium alloy.

Description

technical field [0001] The invention relates to a method for electrolytically producing aluminum-silicon multi-element alloys, which belongs to the field of non-ferrous metals and production technology. Background technique [0002] Al-Si alloys with high aluminum content can be used as the matrix of aluminum alloys and are widely used in the aluminum casting industry. Aluminum-silicon alloy with low aluminum content can be widely used as deoxidizer in steelmaking. There are several methods for preparing AL-Si alloys at home and abroad: re-dissolution method-AL and Si are mixed and melted in a certain proportion to make AL-Si alloy; submerged arc furnace method-bauxite is used as raw material in submerged arc furnace , smelted into AL-Si alloy; electric furnace method-AD aluminum powder is used as raw material to make AL-Si alloy. [0003] The re-dissolution method is actually secondary melting with energy, and the cost is high; the submerged arc furnace method is smelted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/06C25C3/36
Inventor 星野滋郎平野久仁子
Owner 星野滋郎
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