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Inert anode material and preparation method and application of inert anode material

An inert anode and raw material technology, applied in the field of inert anode materials and their preparation, can solve the problems of high energy consumption and large sewage discharge, achieve good electrical conductivity and corrosion resistance, good electrical conductivity, and promote the growth of strategic emerging industries. Effect

Active Publication Date: 2021-08-13
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an inert anode material and its preparation method and application. The inert anode material provided by the invention has strong corrosion resistance, mechanical properties and electrical conductivity in the cryolite molten salt system, and can improve the use of the inert anode. service life, and then solve the problems of high energy consumption and large sewage discharge in the current aluminum electrolysis industry

Method used

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preparation example Construction

[0025] The present invention also provides a preparation method for the inert anode material described in the above technical solution, comprising the following steps:

[0026] mixing metal phase raw materials and ceramic phase raw materials to obtain a mixed material;

[0027] cold pressing the mixed material to obtain a green body;

[0028] The green body is sintered to obtain an inert anode material.

[0029] The invention mixes metal phase raw materials and ceramic phase raw materials to obtain mixed materials. In the present invention, the composition of the metal phase raw material is the same as that of the metal phase in the above technical solution. In the present invention, the particle size of the metal phase raw material is preferably 50-500 mesh, more preferably 100-300 mesh. In the present invention, the metal phase raw material is preferably prepared by a mechanical alloying method or an atomization method, which will be described separately below.

[0030] ...

Embodiment 1

[0055] Al, Co, Cr, Fe and Ni were selected as high-entropy alloy metal raw materials, and all raw materials were placed in absolute ethanol to stand for 1 h, and then placed in an ultrasonic cleaner for 10 min with a power of 200 W. After cleaning, Drying, according to the atomic percentage Al: Co: Cr: Fe: Ni is 1:1:1:1:1, weigh each metal raw material, the purity of each metal raw material is not less than 99.9wt%; the weighed metal The raw materials are put into a high-energy ball mill for mechanical alloying reaction. The ball mill uses a vacuum stainless steel tank and hard alloy balls. The balls are mixed at 200r / min for 8 hours. The ball-to-material ratio is 10:1. Alcohol is added as a process control agent before ball milling. Based on the total mass of each metal raw material, the amount of alcohol added was 1.0 wt%. After the ball milling, the alloy powder was taken out and placed in a constant temperature drying oven, dried at 80°C for 24 hours, and the metal phase ra...

Embodiment 2

[0062]Al, Co, Cr, Fe, Ni, Ti and Cu were selected as high-entropy alloy metal raw materials, and all raw materials were placed in absolute ethanol for 2 hours, then placed in an ultrasonic cleaner, and ultrasonically cleaned at 250W for 25 minutes , dry after washing, according to the atomic percentage Al: Co: Cr: Fe: Ni: Ti: Cu is 0.6:1:1:1:1:1:1, each metal raw material is weighed, and the purity of each metal raw material is different. Less than 99.9wt%; put the weighed metal raw material into a copper crucible for induction melting, vacuumize the induction furnace before melting, the vacuum degree is 0.1torr, and carry out induction melting under the condition of argon as the protective gas , the working temperature is 1495°C. After reaching the working temperature, the melt is sprayed through the high-pressure gas nozzle for atomization treatment. The high-pressure gas is high-purity argon with a purity of 99.999%, and the pressure is 2.0 MPa. The prepared alloy powder is ...

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Abstract

The invention provides an inert anode material and a preparation method and application of the inert anode material and relates to the technical field of non-ferrous metal molten salt electrolysis. The inert anode material comprises a metal phase and a ceramic phase. The metal phase comprises more than five elements of Al, Co, Cr, Fe, Ni, Ti and Cu; and the ceramic phase comprises one or more of CuAl2O4, NiAl2O4, CuCr2O4, NiCr2O4, ZnCr2O4, FeAl2O4, NiFe2O4 and CuFe2O4. The inert anode material has relatively high corrosion resistance, mechanical property and conductivity in a cryolite molten salt system, the service life of an inert anode can be prolonged, and the problems of high energy consumption, large discharge capacity and the like in the current aluminum electrolysis industry are further solved. The inert anode material is suitable for an electrolyte system at 800 DEG C-1000 DEG C, and carbon-free aluminum electrolysis production is realized.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal molten salt electrolysis, in particular to an inert anode material and its preparation method and application. Background technique [0002] Aluminum is the most important basic raw material in the non-ferrous metal industry, and it is an important support for realizing a strong manufacturing country, promoting the growth of strategic emerging industries, and ensuring the development of national defense, military, and aerospace. In 2020, my country's primary aluminum output will be 37.32 million tons, accounting for 57.18% of the world's output. At present, the production process still adopts the Hall-Héroult high-temperature molten salt electrolysis method, and a ton of aluminum needs to consume 450-500kg of carbon anodes, and mainly use CO 2 、CF n Waiting for the escape of greenhouse gases in the form of greenhouse gases, the annual emission of greenhouse gases in the electrolysis pro...

Claims

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Application Information

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IPC IPC(8): C25C3/12C22C29/12C22C30/00B22F3/02B22F3/10B22F9/04B22F9/08
CPCC25C3/12C22C29/005C22C29/12B22F9/04B22F9/082B22F3/02B22F3/1007C22C30/00B22F2009/043B22F2009/0828B22F2009/0848B22F2009/0824Y02P10/25
Inventor 杨文杰吴广鑫朱星宇
Owner ZHENGZHOU UNIV
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