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Method for producing 5N pure aluminum through combination of aluminum electrolysis and directional solidification

A technology of directional solidification and combined production, applied in the field of high-purity aluminum production, can solve the problems of high energy consumption, difficult industrial application, low production efficiency, etc., and achieve the effect of simple process, high proportion and good purification effect

Inactive Publication Date: 2018-11-23
新疆天展新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent produces ultra-high-purity aluminum, the market capacity is currently limited, and it requires a three-layer liquid production process, which requires high energy consumption and high cost
Room temperature ionic liquid electrolysis, the production efficiency is very low, it is difficult to apply in industry
The regional smelting method was proposed in the 1950s, but it is also not suitable for mass industrial production due to low production efficiency

Method used

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  • Method for producing 5N pure aluminum through combination of aluminum electrolysis and directional solidification
  • Method for producing 5N pure aluminum through combination of aluminum electrolysis and directional solidification
  • Method for producing 5N pure aluminum through combination of aluminum electrolysis and directional solidification

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) The electrolytic aluminum process is produced by the Hall-Eru electrolysis method used in industrialization, and the production tank type is a large pre-baked tank with 400kA intermediate feeding. The results of chemical analysis of some impurities in alumina raw materials, carbon anode and electrolytic aluminum solution are as follows:

[0017] Analysis results of controlled impurities in alumina

[0018] Impurity type

SiO 2

Fe 2 o 3

Ga 2 o 3

ZnO

TiO 2

Content / ppm

90

95

40

10

48

[0019] Analysis Results of Control Impurities in Carbon Anode

[0020] Impurity type

Si

Fe

Ni

Ga

V

Ti

Zn

Content / ppm

195

290

100

65

100

45

20

[0021] Analysis results of impurities in electrolytic aluminum liquid

[0022]

[0023] (2) Put the 3N4 grade aluminum liquid produced by electrolysis into the directional crystallization furnace. During di...

Embodiment 2

[0026] (1) The electrolytic aluminum process is produced by the Hall-Eru electrolysis method used in industrialization, and the production tank type is a large pre-baked tank with 400kA intermediate feeding. The results of chemical analysis of some impurities in alumina raw materials, carbon anode and electrolytic aluminum solution are as follows:

[0027] Analysis results of controlled impurities in alumina

[0028] Impurity type

SiO 2

Fe 2 o 3

Ga 2 o 3

ZnO

TiO 2

Content / ppm

100

100

40

10

48

[0029] Analysis Results of Control Impurities in Carbon Anode

[0030] Impurity type

Si

Fe

Ni

Ga

V

Ti

Zn

Content / ppm

200

300

100

65

100

50

25

[0031] Analysis results of impurities in electrolytic aluminum liquid

[0032]

[0033] (2) Put the 3N3 grade aluminum liquid produced by electrolysis into the directional crystallization furnace. During di...

Embodiment 3

[0035] (1) The electrolytic aluminum process is produced by the Hall-Eru electrolysis method used in industrialization, and the production tank type is a large pre-baked tank with 400kA intermediate feeding. The results of chemical analysis of some impurities in alumina raw materials, carbon anode and electrolytic aluminum solution are as follows:

[0036] Analysis results of controlled impurities in alumina

[0037] Impurity type

SiO 2

Fe 2 o 3

Ga 2 o 3

ZnO

TiO 2

Content / ppm

80

85

40

8

35

[0038] Analysis Results of Control Impurities in Carbon Anode

[0039] Impurity type

Si

Fe

Ni

Ga

V

Ti

Zn

Content / ppm

150

210

135

40

81

30

12

[0040] Analysis results of impurities in electrolytic aluminum liquid

[0041]

[0042] (2) Put the 3N4 grade aluminum liquid produced by electrolysis into the directional crystallization furnace. During the ...

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Abstract

The invention discloses a method for producing 5N pure aluminum through combination of aluminum electrolysis and directional solidification. The method comprises the steps that (1) electrolytic aluminum liquid is produced by aluminum oxide raw materials through an electrolysis method; and (2) the electrolytic aluminum liquid obtained in the step (1) is added into a directional crystallization furnace to be directionally solidified, thus the 5N pure aluminum is obtained, the aluminum grade of waste aluminum liquid after directional solidification is still high, the quality requirement of A199.70 in GB / T1196 can be met, the product distribution proportion can be flexibly adjusted according to the market demand situation, and no low-grade aluminum such as A199.60 is generated. The productionmethod is simple in technology and good in purification effect, and the 5N high purity aluminum proportion is high.

Description

technical field [0001] The invention belongs to the field of high-purity aluminum production, and in particular relates to a method for producing 5N pure aluminum in combination with electrolytic aluminum and directional solidification. Background technique [0002] Due to its many unique properties, high-purity aluminum has played an increasingly important role in some high-tech industries. Containers made of its acid corrosion resistance are often used to hold some strong corrosive acids. Utilizing the characteristics of good ductility and electrical conductivity, high-purity aluminum with a purity of 5N can be drawn into filaments with a diameter of 15 μm, which are widely used as wiring in integrated circuits. High-purity aluminum has good low-temperature electrical conductivity, and is used to collect high-energy ion energy such as magnetic beams in space as a "solar sail" that drives spacecraft. The scale of the sputtering target market is expanding day by day, and 5...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/06B22D27/04C22B21/06
CPCB22D27/045C22B21/06C25C3/06
Inventor 曾超林赵泓权赵庆云白万全刘君鹏王龙召
Owner 新疆天展新材料科技有限公司