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Metal phase of cermet inert anode material capable of resisting corrosion of high-temperature molten salt and preparation method and application thereof

A technology of cermets and inert anodes, applied in the field of material science, can solve the problems of high-temperature molten salt corrosion resistance of metal phases to be improved, and achieve the effects of improving molten salt corrosion resistance, stable operation, and improving corrosion performance

Inactive Publication Date: 2011-10-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cermet inert anode material prepared by using the metal phase can withstand the corrosion of long-term high-temperature fluoride molten salt, and can ensure the stable operation of the inert anode in aluminum electrolysis, solving the corrosion resistance of the existing cermet inert anode material for aluminum electrolysis, Especially the problem that the metal phase's resistance to high temperature molten salt corrosion needs to be improved

Method used

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  • Metal phase of cermet inert anode material capable of resisting corrosion of high-temperature molten salt and preparation method and application thereof
  • Metal phase of cermet inert anode material capable of resisting corrosion of high-temperature molten salt and preparation method and application thereof
  • Metal phase of cermet inert anode material capable of resisting corrosion of high-temperature molten salt and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: 15 (20NiFe 2 o 4 -80(20Ni-80Cu)) / 85(10NiO-NiFe 2 o 4 ) cermet inert anode

[0039] 15(20NiFe 2 o 4 -80(20Ni-80Cu)) / 85(10NiO-NiFe 2 o 4 ) The raw material formula of cermet inert anode is shown in Table 1.

[0040] Table 115 (20NiFe 2 o 4 -80(20Ni-80Cu)) / 85(10NiO-NiFe 2 o 4 ) Raw material formula example of cermet inert anode

[0041] raw material

Mass percentage (%)

20Ni-80Cu

12.0

Coated NiFe 2 o 4

3.0

NiO

8.5

NiFe 2 o 4

76.5

[0042] Put 20Ni-80Cu metal powder into a certain amount of NiCl 2 Aqueous solution and FeCl 3 Aqueous solution (n Ni 2+ : n Fe 3+ =1:2,), its 20Ni-80Cu metal and NiCl 2 The molar ratio of the substances is 4:1, the co-current co-precipitation method is adopted, the ammonia water is used as the precipitating agent, the pH value is controlled to be 12, the reaction temperature is 60° C., and the stirring speed is 200 r / min. Filter the resul...

Embodiment 2

[0044] Embodiment 2: 15 (30NiFe 2 o 4 -70(20Ni-80Cu)) / 85(10NiO-NiFe 2 o 4 ) cermet inert anode

[0045] 15(30NiFe 2 o 4 -70(20Ni-80Cu)) / 85(10NiO-NiFe 2 o 4 ) The raw material formulation of the cermet inert anode is shown in Table 2.

[0046] Table 215 (30NiFe 2 o 4 -70(20Ni-80Cu)) / 85(10NiO-NiFe 2 o 4 ) Raw material formula example of cermet inert anode

[0047] raw material

Mass percentage (%)

20Ni-80Cu

10.5

Coated NiFe 2 o 4

4.5

NiO

8.5

NiFe 2 o 4

76.5

[0048] Put 20Ni-80Cu metal powder into a certain amount of NiCl 2 Aqueous solution and FeCl 3 Aqueous solution (n Ni 2+ : n Fe 3+ =1:2,), its 20Ni-80Cu metal and NiCl 2 The molar ratio of substances is 7:3, the co-current co-precipitation method is adopted, ammonia water is used as the precipitating agent, the pH value is controlled to be 12, the reaction temperature is 60° C., and the stirring speed is 200 r / min. Filter the resul...

Embodiment 3

[0050] Embodiment 3: 15 (40NiFe2 o 4 -60(20Ni-80Cu)) / 85(10NiO-NiFe 2 o 4 ) cermet inert anode

[0051] 15 (40NiFe 2 o 4 -60(20Ni-80Cu)) / 85(10NiO-NiFe 2 o 4 ) The raw material formulation of the cermet inert anode is shown in Table 3.

[0052] Table 315 (40NiFe 2 o 4 -60(20Ni-80Cu)) / 85(10NiO-NiFe 2 o 4 ) Raw material formula example of cermet inert anode

[0053] raw material

Mass percentage (%)

20Ni-80Cu

9.0

Coated NiFe 2 o 4

6.0

NiO

8.5

NiFe 2 o 4

76.5

[0054] Put 20Ni-80Cu metal powder into a certain amount of NiCl 2 Aqueous solution and FeCl 3 Aqueous solution (n Ni 2+ : n Fe 3+ =1:2,), its 20Ni-80Cu metal and NiCl 2 The molar ratio of the substances is 3:2, the co-current co-precipitation method is adopted, ammonia water is used as the precipitant, the pH value is controlled to be 12, the reaction temperature is 60° C., and the stirring speed is 200 r / min. Filter the resulting p...

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Abstract

The invention provides a metal phase of a cermet inert anode material capable of resisting the corrosion of high-temperature molten salt and a preparation method and application thereof. A defined amount of spinel oxide powder is covered on the surface of metal phase so as to avoid that the metal phase is corroded in high-temperature molten salt prior to ceramic phase and increase the corrosion resistance of metal phase in high-temperature molten salt. Therefore, the aim that the inert anode resists the corrosion of high-temperature molten salt can be realized.

Description

technical field [0001] The invention belongs to the field of material science and relates to a metal phase in a cermet inert anode material resistant to high temperature molten salt corrosion and its preparation and application. Background technique [0002] At present, cermets are considered to be the most promising alternative to carbon anodes as molten salt electrolysis ( One of the inert anode materials such as electrolytic aluminum). In high-temperature molten salt electrolytes, due to the difference in corrosion performance between the metal phase and the ceramic phase, it is easy to cause the metal phase to corrode preferentially compared to the ceramic phase, which will cause problems such as electrolyte penetration, material swelling and cracking. Therefore, it is necessary to take effective methods to strengthen metal-ceramic materials. Improve the corrosion performance of the metal phase and improve its high temperature molten salt corrosion resistance. The curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/12C25C7/02
Inventor 何汉兵秦毅红刘锋
Owner CENT SOUTH UNIV
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