Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Inert ceramet anode for electrolyzing molten salt and its prepn

A technology of cermets and inert anodes, applied in the direction of electrodes, electrolytic components, electrolytic processes, etc., can solve the problems of metal phase overflow and uneven distribution, poor thermal shock resistance, poor conductivity, etc., and achieve improved electrolyte corrosion resistance and sintering The effect of convenient performance and good sintering performance

Inactive Publication Date: 2006-11-08
CENT SOUTH UNIV +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, cermets take into account the advantages of strong corrosion resistance of metal oxide ceramics and good electrical conductivity of metals, but have poor thermal shock resistance and poor electrical conductivity (the commonly used ceramic phase matrix NiFe 2 o 4 Poor electrical conductivity), difficulty in connecting with metal guide rods, difficulty in large-scale and other issues; in addition, in the process of material preparation, due to the poor wettability of the metal phase (such as Cu) to the ceramic matrix, the ceramic matrix The stability of the metal phase is poor, and the overflow and uneven distribution of the metal phase are prone to occur, and it is difficult to realize the densification of the material; the oxidation of the metal phase and the dissociation or reduction of the ceramic phase are prone to occur during the sintering process of the material; Oxidation and selective dissolution of the phase, and at the same time bring the slag off of the ceramic phase

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inert ceramet anode for electrolyzing molten salt and its prepn
  • Inert ceramet anode for electrolyzing molten salt and its prepn
  • Inert ceramet anode for electrolyzing molten salt and its prepn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] SnO 2 -NiFe 2 o 4 / Ni-Cu-Co cermet inert anode.

[0028] ① Prepare ceramic powder, press figure 1 The technical process is carried out, the raw materials in Table 1 are added to industrial alcohol as a dispersant, ball milled for 8 hours, and calcined at 1200 ° C for 8 hours to obtain ceramic powder with an average particle size of 3.31 μm. X-ray diffraction phase analysis shows that the ceramic powder contains SnO 2 and NiFe 2 o 4 Two phases; the obtained ceramic matrix has good corrosion resistance, has semiconductor properties at the temperature of aluminum electrolysis, and is used as the powder raw material of the ceramic matrix of the cermet inert anode.

[0029] raw material

Mass percentage (%)

SnO 2

50.00

f 2 o 3

36.58

NiO

13.42

[0030] ②Preparation of cermet inert anode, according to figure 2 The technical process is carried out, the raw materials in Table 2 are used as the dispersant of...

Embodiment 2

[0033] SnO 2 -NiFe 2 o 4 -Sb 2 o 3 / Ni-Cu-Cr cermet inert anode

[0034] ① Prepare ceramic powder, press figure 1The process flow is carried out. The raw materials in Table 3 are treated with industrial alcohol as a dispersant, ball milled for 8 hours, and calcined at 1200°C for 8 hours to obtain ceramic powder with an average particle size of 3.11 μm. X-ray diffraction phase analysis shows that the ceramic powder mainly contains SnO 2 and NiFe 2 o 4 two phases. The obtained ceramic substrate has good corrosion resistance, has semiconducting properties at the aluminum electrolysis temperature, and has good electrical conductivity, and can be used as a ceramic powder raw material for a cermet inert anode.

[0035] raw material

Mass percentage (%)

SnO 2

48.00

f 2 o 3

36.58

NiO

13.42

Sb 2 o 3

2.00

[0036] ②Preparation of cermet inert anode, according to figure 2 The technical process is...

Embodiment 3

[0039] SnO 2 -NiAl 2 o 4 -CuO / Ni-Cu-Ag cermet inert anode

[0040] ① Prepare ceramic powder, press figure 1 The process flow is carried out. The raw materials in Table 5 are treated with industrial alcohol as a dispersant, ball milled for 8 hours, and calcined at 1300° C. for 8 hours to obtain a ceramic powder with a thickness of 4.11 μm. X-ray diffraction phase analysis shows that the ceramic powder mainly contains SnO 2 and NiAl 2 o 4 two phases. The obtained ceramic matrix has good corrosion resistance, has semiconducting properties at the aluminum electrolysis temperature, and can be used as a ceramic powder raw material for the cermet inert anode.

[0041] raw material

Mass percentage (%)

SnO 2

50.00

al 2 o 3

27.71

NiO

20.29

CuO

2.00

[0042] ②Preparation of cermet inert anode, according to figure 2 The technical process is carried out. The raw materials in Table 6 are used as t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to an electrode for extraction of nonferrous metals by molten salt electrolysis, in particular to a cermet inert anode and a preparation method thereof. It is characterized in that: first use 0.01-100% SnO 2 , 0~99%AB 2 O 4 ,0~30%M x O y Preparation of SnO 2 -AB 2 O 4 -M x O y Ceramic powder, AB 2 O 4 It is a composite oxide with a spinel structure; the ceramic phase is 50-99% SnO 2 -AB 2 O 4 -M x O y Ceramic powder, metal phase is 1-50% Ni-Cu-X alloy powder or metal powder with corresponding content of Ni, Cu and X to prepare cermet inert anode. The invention improves the conductivity and corrosion resistance of the ceramic phase and improves the wetting performance of the metal relative to the ceramic phase, so that the metal phase does not overflow and is evenly distributed during the sintering process of the cermet inert anode, achieving the densification effect of the material; avoiding The metal phase is oxidized and the ceramic phase is dissociated or reduced to obtain a cermet inert anode material with target phase and good performance.

Description

Technical field: [0001] The invention relates to an electrode for the molten salt electrolysis extraction of nonferrous metals (Al, rare earth and high melting point metals, etc.), in particular to a cermet inert anode and a preparation method thereof. Background technique: [0002] The high-temperature molten salt electrolysis process puts forward strict requirements for inert anode materials, mainly including: able to withstand the corrosion of the electrolyte, low solubility; able to withstand the erosion of high-temperature new ecological oxygen; good electrical conductivity; high mechanical strength, Strong thermal shock resistance, not easy to be brittle; easy to process and shape, easy to connect with metal guide rods, etc. The inert anode materials reported in the patent literature mainly include metal oxide ceramics, alloy anodes and cermets. Among them, cermets take into account the advantages of strong corrosion resistance of metal oxide ceramics and good electri...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/12C25C7/02
Inventor 赖延清李劫丁风其田忠良张刚秦庆伟张吉龙孟杰刘业翔
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com