BR112013029998A2

BR112013029998A2 - electrolysis cell and cathode with irregular surface profile

Info

Publication number: BR112013029998A2
Application number: BR112013029998A
Authority: BR
Inventors: Hiltmann Frank; Frommelt Thomas
Original assignee: Sgl Carbon Se
Priority date: 2011-05-23
Filing date: 2012-04-25
Publication date: 2017-01-31
Also published as: CA2836838A1; JP2014517876A; DE102011076302A1; RU2013156866A; CN103635610A; WO2012159839A3; ZA201308689B; WO2012159839A2; EP2714965A2; AU2012261136A1; US20140076723A1

Abstract

abstract the present invention relates to an electrolysis cell, in particular for the production of aluminium, comprising a cathode, on the upper side of the cathode a layer of liquid aluminium, thereon a melt layer and above the melt layer an anode, wherein the cathode comprises at its upper side a surface profiling formed by two or more elevations, wherein the surface profiling of the cathode is constituted and disposed in such a way that an elevation is in each case provided at at least two of the twenty points of the surface of the upper side of the cathode which in each case are disposed vertically beneath those regions of the boundary surface between the layer of liquid aluminium and the melt layer in which the peaks with the twenty highest maximum values are present in the distribution of the reference wave formation potential present in the boundary surface, wherein a reference wave formation potential is defined as the wave formation potential which, during the operation of the electrolysis cell with - instead of the cathode with the surface profiling - a reference cathode without surface profiling, but an otherwise identical configuration to the cathode with surface profiling, is present at a point in the boundary surface between the layer of liquid aluminium and the melt layer. _______________________________________________________________________ tradução do resumo resumo patente de invenção "célula de eletrólise e catodo com perfil de superfície irregular". a presente invenção refere-se a uma célula de eletrólise, em particular para a produção de alumínio, compreendendo um catodo, sobre o lado superior do catodo uma camada de alumínio líquido, após o que uma camada de fusão e acima da camada de fusão um anodo, em que o catodo compreende em seu lado superior um perfil de superfície formado por duas ou mais elevações, em que o perfil de superfície do catodo é constituído e disposto de tal modo que uma elevação é, em cada caso, provida a pelo menos dois dos vinte pontos da superfície do lado superior do catodo que, em casa caso, são dispostos verticalmente debaixo das regiões da superfície de limite entre a camada de alumínio líquido e a camada de fusão em que os picos com os vinte maiores valores máximos estão presentes na distribuição do potencial de formação de onda de referência presente na superfície de limite, em que um potencial de formação de onda de referência é definido como o potencial de formação de onda que, durante a operação da célula de eletrólise com - em vez do catodo com o perfil de superfície - um catodo de referência sem perfil de superfície, mas de configuração de outro modo idêntica ao catodo com perfil de superfície, está presente em um ponto na superfície de limite entre a camada de alumínio líquido e a camada de fusão.abstract the present invention relates to an electrolysis cell, in particular for the production of aluminum, comprising a cathode, on the upper side of the cathode a layer of liquid aluminum, thereon a melt layer and above the melt layer anode, wherein the cathode comprises at its upper side a surface profiling formed by two or more elevations, wherein the surface profiling of the cathode is constituted and disposed in such a way that an elevation is in each case provided at least two of the twenty points of the surface of the upper side of the cathode which in each case are vertically disposed below those regions of the boundary surface between the layer of liquid aluminum and the melt layer in which the peaks with the twenty highest maximum values are present in the distribution of the reference wave formation potential present in the boundary surface, wherein a reference wave formation potential is defined as the wave formation potential which, during the operation of th and electrolysis cell with - instead of the cathode with the surface profiling - a reference cathode without surface profiling, but otherwise identical configuration to the cathode with surface profiling, is present at a point in the boundary surface between the layer of liquid aluminum and the melt layer. _______________________________________________________________________ translation of abstract patent summary "electrolysis cell and cathode with irregular surface profile". The present invention relates to an electrolysis cell, in particular for the production of aluminum, comprising a cathode, on the upper side of the cathode a liquid aluminum layer, after which a melt layer and above the melt layer a anode, wherein the cathode comprises on its upper side a surface profile formed by two or more elevations, wherein the cathode surface profile is constituted and arranged such that an elevation is in each case provided with at least two of the twenty points of the upper side surface of the cathode which, in each case, are arranged vertically below the boundary surface regions between the liquid aluminum layer and the melt layer where the peaks with the highest twenty values are present. in the distribution of the reference waveform potential present on the boundary surface, where a reference waveform potential is defined as the potential of which, during operation of the electrolysis cell with - instead of the surface profile cathode - a reference cathode with no surface profile but otherwise identical to the surface profile cathode, is present in a point on the boundary surface between the liquid aluminum layer and the melt layer.