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Inert anode for producing aluminium by igneous electrolyse and method for producing said anode

A manufacturing method and anode technology, applied in the field of anode production of aluminum, can solve problems such as difficulty in controlling the debonding step and the like

Inactive Publication Date: 2006-11-15
PECHINEY ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is therefore very difficult to control the debonding step

Method used

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  • Inert anode for producing aluminium by igneous electrolyse and method for producing said anode
  • Inert anode for producing aluminium by igneous electrolyse and method for producing said anode

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Embodiment Construction

[0032]A preferred embodiment of the invention relates to a method for the manufacture of a part having a defined shape for forming all or part of an anode for the electrolytic production of aluminum in a molten bath, said part comprising at least one Structured metal oxides and cermets formed from at least one metal phase, the method comprising:

[0033] - preparation of a powder comprising at least one mixed oxide having a spinel structure, one of the constituents of which is a metal R in the form of a cation, which metal R can be fully or partially reduced by a reduction operation, to forming all or part of said metallic phase, said reducing operation preferably being carried out at least partly during said component manufacturing method,

[0034] - preparation of a mixture comprising said powder and a binder, usually an organic binder,

[0035] - forming said part by pressing the mixture,

[0036] - the debonding operation of said parts,

[0037] - Sintering operation of...

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Abstract

The invention relates to a method for producing a solid part for forming an entire anode or the part thereof for producing aluminium by igneous electrolyse and comprising a cermet made of at least one type of metal oxide such as a spinel mixed oxide containing a R metal in the form of cations in the chemical structure thereof. Said R metal is entirely or partly reducible by a reducing operation during a production process in such a way that the entire metallic phase or the part thereof is formed. The inventive method makes it possible to obtain a cermet whose metallic phase comprises a homogenous distribution of fine metallic particles.

Description

field of invention [0001] The present invention relates to anodes for the production of aluminum by electrolysis. More specifically, the present invention relates to so-called "inert" or "non-consumable" anodes and their preparation and use. Background technique [0002] Aluminum metal is produced industrially, in particular according to the known Hall-Héroult process, by molten bath electrolysis, ie by the electrolytic reduction of aluminum oxide in solution in a bath of molten cryolite known as an electrolytic bath. The electrolytic reduction is carried out in an electrolytic cell comprising an electrolytic cell equipped with a carbon cathode element and one or several anodes. The electrolytic bath is contained in an electrolytic cell, and the anode is partially submerged in the electrolytic bath. The electrolytic bath is maintained at the temperature required by the Joule effect by using an electrolytic current. Alumina is regularly supplied to the electrolytic cell in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/12C04B35/26C25C3/12
CPCB22F2999/00C04B35/2666C04B35/6267C04B2235/3272C04B2235/3279C04B2235/3281C04B2235/407C04B2235/449C04B2235/652C04B2235/658C04B2235/6582C04B2235/77C04B2235/786C04B2235/80C04B2235/83C04B2235/96C22C29/12C25C3/12B22F3/115B22F3/001
Inventor P·塔亚德A·鲁塞A·加布里埃尔V·巴科-卡莱斯V·洛朗A-P·拉马兹
Owner PECHINEY ALUMINUM
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