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Metal oxide ceramic inert anode and preparation method and application thereof

A technology of oxide ceramics and inert anodes, which is applied in the field of oxide cermet inert anodes and its preparation, can solve problems such as inability to produce aluminum products, achieve low cost, good resistance to high temperature medium corrosion and oxidation, and good toughness and plasticity Effect

Inactive Publication Date: 2014-08-27
王宇栋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the corrosion and dissolution of the anode, the cathode aluminum product is polluted by anode impurities and cannot produce aluminum products with qualified purity. Therefore, it can be considered that the use of metal anodes in aluminum electrolysis is temporarily unfeasible.

Method used

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  • Metal oxide ceramic inert anode and preparation method and application thereof
  • Metal oxide ceramic inert anode and preparation method and application thereof
  • Metal oxide ceramic inert anode and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The percentage composition of the inert anodic oxide ceramic phase is: Fe 2 o 3 : NiO : ZrO 2 :V 2 o 5 : CeO 2 : MgO=58.65wt% : 28.35wt% : 7wt% : 2wt% : 2wt% : 2wt%. The weight percent of oxide phase and metal phase is oxide: metal=75wt%: 25wt%. The metal phase is composed of five elements: Fe, Ni, Cu, Mn, and Y. The percentages of the five metals in the metal phase are Fe: Ni: Cu: Mn: Y=40wt%: 12.5wt%: 40.0wt%: 6wt %: 1.5wt%;

[0044] The preparation of the anode is carried out in the following seven steps,

[0045] Step 1: Weigh Fe in proportion (67.4wt%: 32.6wt%) 2 o 3 NiO powder and NiO powder are mixed evenly, put into a ceramic container and calcined at 960°C for 4 hours to form NiFe 2 o 3 Complex;

[0046] The second step: the calcined and cooled NiFe 2 o 3 Take out and weigh 7wt%ZrO by percentage 2 , 2wt%V 2 o 5 , 2wt%CeO 2 Mix with 2wt%MgO four kinds of powders, and then put it into a horizontal stirring high-energy ball mill for 20 hours ...

Embodiment 2

[0054] The percentage of inert anodic oxide ceramic phase is: Fe 2 o 3 : NiO : ZrO 2 :V 2 o 5 : CeO 2 : MgO=58.65wt% : 28.35wt% : 6.0wt% : 1.0wt% : 3.0wt% : 3.0wt%. The percentage composition of metal phase and oxide phase is: oxide: metal=80wt%: 20wt%. The metal phase is composed of Cu, Ni, Fe, Co, and Zn. The weight percentage of the five metal elements is: Cu: Fe: Ni: Co: Zn=42wt%: 35wt%: 12wt%: 6wt%: 5wt%;

[0055] The method and steps for preparing an inert anode are basically the same as in Example 1, except for the following three points: the first is that when calcination synthesizes spinel, the calcination temperature is 920 ° C, and the holding time is 6 hours; the second is pressing Figure 1 When the process flow is conventional ball milling for 12 hours, the modifier added is primary alcohol HO-R, and the addition amount is 0.5wt% of the material; in the last 2 hours of conventional ball milling, the binder added to the ball mill is polyethylene Acetat...

Embodiment 3

[0058] The percentage of the oxide ceramic phase and the total amount of metal in the inert anode is: ∑ oxide: ∑ metal=85wt%: 15wt%; the weight percentage of each oxide in the oxide phase is: Fe 2 o 3 : NiO : ZrO 2 :V 2 o 5 : CeO 2 : MgO=58.65wt% : 28.35wt% : 6.5wt% : 1.5wt% : 2.5wt% : 2.5wt%. The metal phase is composed of Fe, Cu, Ni, Cr, Ti, V six components. The weight percentage of each metal component is composed of: Fe: Cu: Ni: Cr: Ti: V=38wt%: 40wt%: 10wt%: 5wt%: 5wt%: 2wt%. All oxides and metals added are industrial grade micron coarse powder. The particle size of the powder is between 100 and 250 mesh;

[0059] The method and steps for preparing an inert anode are basically the same as in Example 1. The only difference is the following three points: first, when calcining synthetic spinel, the calcining temperature is 940°C, and the holding time is 5 hours; Figure 1 When the process is conventionally ball milled for 12 hours, the added nano-powder surface...

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Abstract

The invention relates to a fused salt electrolytic aluminum inert anode and a preparation method and application thereof, and belongs to the technical field of ceramic-metal composite materials. The inert anode is composed of an oxide ceramic primary phase and a metal secondary phase. The oxide ceramic primary phase is composed of a nano and quasi-nanoparticle level NiFe2O4 spinel principal component and a ZrO2, V2O5, CeO2 ad MgO modified adding component. The metal secondary phase is formed by selecting five to six of micron order Ni, Cu, Co, Zn, Cr, Ag, Ti, Al, Sc, Zr, No, V, Mn, Y and La. The inert anode is compounded through spinel, nano and quasi nano oxide is obtained by milling through a high energy ball, and the inert anode can be prepared through the steps of common ball milling, compression molding and metal or protective atmosphere sintering, machining and the like of oxide and metal powder. The fused salt electrolytic aluminum inert anode has the advantages of being good in electrical conductivity, high in high-temperature salt corrosion resistance and antioxidation, good in thermal shock resistance and capable of not polluting aluminum electrolysis products. The fused salt electrolytic aluminum inert anode is used in fused salt electrolytic aluminum and is used as a substitution of a carbon anode, and the problems of high consumption and high pollution in the aluminum industry at present can be solved.

Description

technical field [0001] The invention relates to an oxide metal-ceramic inert anode and a preparation method and application thereof, belonging to the technical field of oxide metal-ceramic composite materials. Background technique [0002] The traditional aluminum electrolysis is to conduct molten salt electrolysis in a high-temperature electrolyte of 940-970°C in an electrolyte mainly composed of cryolite and alumina, with carbon materials as the anode. During the electrolysis process, metal aluminum is generated on the cathode, and new ecological oxygen is generated on the anode. At the above high temperature, the new ecological oxygen atoms generated on the anode will oxidize and burn the carbon anode to generate CO 2 , CO and CF 4 , C 2 f 6 , SO X .NO polluting gas, according to statistics, every ton of aluminum produced will emit about 1200m 3 the above-mentioned polluting gases; [0003] Secondly, due to the continuous burning of carbon anodes, the consumption of...

Claims

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Application Information

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IPC IPC(8): C25C3/12
Inventor 不公告发明人
Owner 王宇栋
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