CN103958739A - Electrolytic cell, in particular for producing aluminum, having a tub-shaped cathode - Google Patents
Electrolytic cell, in particular for producing aluminum, having a tub-shaped cathode Download PDFInfo
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- CN103958739A CN103958739A CN201280055258.0A CN201280055258A CN103958739A CN 103958739 A CN103958739 A CN 103958739A CN 201280055258 A CN201280055258 A CN 201280055258A CN 103958739 A CN103958739 A CN 103958739A
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
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Abstract
The invention relates to an electrolytic cell, which is particularly suitable for producing aluminum. The electrolytic cell comprises a cathode, a layer of liquid aluminum arranged on the top side of the cathode, a melt layer on top thereof, an anode above the melt layer, at least one and preferably at least two bus bars that contact the cathode from the bottom side of the cathode in a current-supplying manner, and at least one external current supply, wherein each of the at least one external current supply is connected in an electrically conductive manner to at least one respective and preferably at least two respective bus bars at a respective connection point; the top side of the cathode is tub-shaped as viewed in the cross-section of the cathode; the tube has two edge regions and a bottom region which is arranged between the edge regions and lowered relative to the edge regions as viewed in the width direction of the cathode; a respective side wall region is provided between each edge region and the bottom region; and the side wall region connects the respective edge region and the bottom region, wherein i) the width of at least one of the bottom region and the edge regions varies over the length of the cathode, and/or ii) the height of the top side of the cathode determined from the bottom side of the cathode varies over the length of the cathode.
Description
Technical field
The present invention relates to a kind of electrolyzer, especially for the electrolyzer of producing aluminium, and relate to a kind of negative electrode of using in such electrolyzer of being adapted at.
Background technology
Electrolyzer is for example for electrolytic production of aluminum, industrial conventionally according to Hall-Ai Lu
this electrolysis production of process implementing.In Hall-Ai Lu technique, the melt that electrolysis is comprised of aluminum oxide and sodium aluminum fluoride.Use sodium aluminum fluoride Na herein
3[AlF
6], thereby by fusing point 2,045 ℃ from pure alumina, be reduced to approximately 950 ℃ containing the mixture of sodium aluminum fluoride, aluminum oxide and additive, this additive is for example aluminum fluoride and Calcium Fluoride (Fluorspan).
The electrolyzer using in this technique comprises cathode bottom, and this cathode bottom can be comprised of a plurality of cathode blocks adjacent one another are and that form negative electrode.The heat and the electrochemical conditions that in order to stand electrolyzer run duration, mainly exist, negative electrode is comprised of carbonaceous material conventionally.The downside of each cathode block has groove conventionally, arranges at least one bus in each groove, by this bus, discharges by the electric current of anode feed.Anode, the anode particularly being formed by independent anode block, be arranged higher than layer of liquid aluminium approximately 3 to 5cm, it is 15 to 50cm high that layer of liquid aluminium is usually located on negative electrode upside, ionogen, that is to say the melt that contains aluminum oxide and sodium aluminum fluoride, between described anode and the surface of aluminium.During implementing electrolysis with approximately 1,000 ℃, owing to comparing with ionogen, the density of aluminium is larger, so the aluminium forming is deposited under dielectric substrate, that is to say that sedimentation is the upside of negative electrode and the middle layer between dielectric substrate.During electrolysis, the aluminum oxide dissolving in melt is by electric current cracking, to form aluminium and oxygen.From electrochemistry aspect, layer of liquid aluminium is actually negative electrode, and this is because aluminum ion is reduced on its surface, with forming element aluminium.Yet, below term " negative electrode " should be interpreted as to be the negative electrode in electrochemistry viewpoint, that is to say layer of liquid aluminium, but should be understood as the components that forms electrolyzer bottom, the components for example being formed by one or more cathode blocks.
The distinct disadvantage of Hall-Ai Lu technique is that it consumes energy very much.In order to produce the aluminium of 1kg, need to approximately 12 electric energy to 15kWh, what electric energy accounted for production cost is up to 40%.Therefore,, in order to reduce production costs, be desirably in the specific energy consumption that reduces the method in possible situation.
Owing to particularly comparing with cathode material with layer of liquid aluminium, the resistance of melt is relatively high, so particularly there is the relatively high ohmic loss of Joule dissipation form in melt.Consider specific loss higher in melt, the thickness of the melt layer that makes great effort to reduce as much as possible, and therefore reduce the distance between anode and layer of liquid aluminium.Yet, due to the electromagnetic interaction existing during electrolysis process, and thereby the formation of the ripple that produces in layer of liquid aluminium, thereby there is following risk in excessively thin melt layer, be that layer of liquid aluminium will contact anode, this may cause electrolyzer short circuit, and causes the bad of formed aluminium to reoxidize, and the electrical instability that causes electrolysis procedure, particularly causes calling voltage fluctuation.The short circuit occurring also can cause wearing and tearing to increase, and therefore causes shorten the work-ing life of electrolyzer.For those reasons, can not at random reduce the distance between anode and layer of liquid aluminium.
The motivating force that layer of liquid aluminium medium wave forms is current density on cathode surface and the uneven distribution of magnetic flux density, the distribution that this uneven distribution causes the promotion ripple of the lorentz force density in layer of liquid aluminium to form.Herein, lorentz force density is defined as the vector product of the current density that specified point place exists and the magnetic flux density existing at this some place.One of them reason of negative electrode upside place's current density and magnetic flux density uneven distribution is again the following fact: preferably, and the path that the electric current in negative electrode and aluminium groove is taked most low-resistance.For this reason, the electric current of negative electrode of flowing through mainly concentrates in the edge area of negative electrode, wherein negative electrode is connected to the bus of the described negative electrode of contact, this is because compare with the electric current that arrives cathode surface by cathode center, by fringe region, arrive the resistance that the electric current of cathode surface produces lower, in the situation that arriving cathode surface by cathode center, compare with the electric current that arrives cathode surface by fringe region, must be through longer route or electric pathway.
The ripple of the enhancing in layer of liquid aluminium forms, inhomogeneous electric current distribution, particularly at negative electrode in a lateral direction, compare with the current density of cathode center, edge area in negative electrode has the current density of increase, this also causes the wearing and tearing aggravation in cathode side fringe region, and this after relatively long-term electrolyzer operation, causes the feature of negative electrode approximate W shape wear profile conventionally in the cross section of negative electrode.
In order to reduce the specific energy consumption of electrolyzer, propose recently, in electrolyzer, use following negative electrode, wherein, when observing from negative electrode cross section, the upside of this negative electrode is implemented as the form of V-shaped groove.Herein, the depression being configured in the cathode surface of V-shaped groove form causes the current density in cathode side fringe region to reduce, and therefore, in these regions, the possibility that ripple forms and wearing and tearing also reduce.
Yet, even if use this groove type cathode, also in layer of liquid aluminium, there is poorly high ripple and form, and because the thickness of the sodium aluminum fluoride layer between aluminium and anode is low, cause unstable, and be limited in attainable energy efficiency during electrolysis.In addition, by using this negative electrode, also may, during electrolysis, on the upside of negative electrode, there is bad high-caliber uneven wear.These two work-ing lifes that factor has reduced electrolyzer, and therefore reduced its economic feasibility.This is because following true: even if use this negative electrode, at negative electrode outwardly, still have relatively inhomogeneous electric current distribution and inhomogeneous flux density distribution, even compare with the negative electrode of not implementing in groove shape mode, described ununiformity is low.This particularly because, the bus of Contact cathod is connected to one or more foreign current feeds by running contact bar conventionally, wherein the distance of facing between the end of this end of the end of foreign current feed and independent bus is different, thereby for different buses, the electrical path length of the point from foreign current feed to independent bus Contact cathod downside is different.Yet, for predetermined material, to compare with shorter electric pathway, longer electric pathway has higher resistance.Thereby promote electric current following those buses of flowing through, the more close foreign current feed of point of this bus Contact cathod downside, consequently, compare apart from the fringe region on the farther bus of foreign current feed or the electric current in longitudinal component with the point that is arranged in bus Contact cathod downside of negative electrode, larger current flowing occurs in the cathode edge region on being disposed in the bus nearer than above-mentioned distance or longitudinal component.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of following electrolyzer, at its run duration, this electrolyzer has the specific energy consumption of reduction and the work-ing life of growth.Especially, will provide so a kind of electrolyzer, wherein the thickness reduction of melt layer, does not cause occurring unstable, for example, owing to increasing the short circuit cause in layer of liquid aluminium medium wave formation trend, or the reoxidizing of the aluminium that forms, or the fluctuation of electrolytic cell voltage.
According to the present invention, by providing according to this patent electrolyzer claimed in claim 1, particularly by being provided for producing the electrolyzer of aluminium, realize this object, this electrolyzer comprises: negative electrode, be disposed in the layer of liquid aluminium on negative electrode upside, melt layer on it, anode on melt layer, at least one bus, preferred at least two buses, this bus is with current feed mode negative electrode described in side contacts from negative electrode, with at least one foreign current feed, wherein said at least one or each foreign current feed is connected at least one bus in tie point place conduction separately, preferably conduction is connected at least two buses, wherein in the cross section of negative electrode, observe, the upside of this negative electrode is groove shape, wherein this cell body has two fringe regions and a bottom section, this bottom section is disposed between fringe region, and the width at negative electrode, with respect to fringe region, reduce, wherein, between each fringe region and bottom section in two fringe regions, the sidewall areas that connects corresponding fringe region and bottom section is set, i wherein) bottom section and fringe region at least one of them width in the length of negative electrode, change, and/or ii) from the height of the upside of the definite negative electrode of negative electrode downside, in the length of negative electrode, change.
In the context of the present invention, the width of the bottom section of negative electrode upside or fringe region should be interpreted as and refer to, the bottom section of measuring at negative electrode width or the extension of fringe region, that is to say, in the cross section of negative electrode, observe or observe on the width of negative electrode, from one end of bottom section or fringe region to the distance of the other end of bottom section or fringe region.
In addition, in the context of the present invention, statement " from the height of the upside of the definite negative electrode of the downside of negative electrode " refers to following distance, i.e. any point on negative electrode upside, with the distance of point on the negative electrode downside being vertically arranged under above-mentioned point.
In the context of the present invention, foreign current feed is interpreted as and refers to following any electric conductor, it is disposed in cathode external, and is fed to electric current or is fed to electric current from one or more buses to one or more buses.Herein, foreign current feed all can be connected directly to described one or more bus by tie point in each case, or foreign current feed can, by being disposed in the running contact bar between foreign current feed and bus, be connected to described one or more bus indirectly.Under latter event, tie point should be interpreted as and refer to following point, at this some place, foreign current feed is connected to running contact bar, and this running contact bar is connected to bus.In other words, statement " tie point between at least one bus, preferred at least two buses and foreign current feed " refers to following point, at this some place, start from conductively the electric pathway that (directly or indirectly) be connected to one or more buses of foreign current feed and converge, and be transferred to foreign current feed.Under this background, statement " electric pathway " refers to the current path of resistance minimum between 2.
According to the present invention, have been found that, by a kind of negative electrode with cell body shape of cross section, this cell body has cell body bottom section and/or the fringe region of width and/or height change in the length of negative electrode, at the upside place of negative electrode, be more particularly not only considered as on the cross section of the separated longitudinal component of negative electrode, and especially on all surfaces of negative electrode, that is to say on the longitudinal direction and width of negative electrode, all realize the homogenizing of current density and magnetic flux density.This is that cathode material has low electric conductivity because compare with the layer of liquid aluminium being arranged thereon, consequently, compares with the fringe region of negative electrode, and electric current more preferably flows in the bottom section of groove shape cross section, compares with bottom section, and fringe region raises.Therefore, in negative electrode longitudinal component, the bottom section of negative electrode widens or fringe region reduced width, cause generally promoting electric current to flow and (that is to say in this longitudinal component, compare with another longitudinal component), and cause the electric current in the fringe region with this longitudinal component of negative electrode to be compared, promote the current flowing in bottom section, and wherein the bottom section of negative electrode does not have the electric current in negative electrode longitudinal component so not wide and that fringe region is wider to reduce generally, and compare with the electric current in the fringe region of this longitudinal component of negative electrode, current reduction in bottom section.Similarly, because the height of negative electrode upside in negative electrode longitudinal component reduces, thus promoted generally the current flowing in this longitudinal component, and the electric current that wherein upside of negative electrode has in the negative electrode longitudinal component of larger height reduces generally.Staged (about width and/or height) embodiment due to cathode edge region and bottom section, thereby can regulate the electric current between the independent longitudinal component of negative electrode and on each longitudinal component width, so that at negative electrode outwardly, produce more uniform current density.Especially, staged embodiment due to cathode edge region and bottom section, can be by widening fringe region and/or rising fringe region and/or bottom section, reduce the electric current of following those longitudinal components of negative electrode of flowing through, this longitudinal component is disposed in on Down Highway, the more close foreign current feed of point of this bus Contact cathod downside, and can be by reducing the width of fringe region and/or reducing fringe region and/or the height of bottom section, improve the electric current of following those longitudinal components of negative electrode of flowing through, this longitudinal component is disposed in on Down Highway, the point of this bus Contact cathod downside is further from foreign current feed, so that can be independent of described longitudinal component apart from the distance of foreign current feed, electric current and the magnetic flux homogenizing of independent longitudinal component of negative electrode makes to flow through.Due at negative electrode outwardly, current density and magnetic flux density are even, so reduced significantly the ripple in layer of liquid aluminium, form, and observe in its surface, homogenizing the wearing and tearing of negative electrode.Result is that electrolyzer according to the present invention has lower specific energy consumption at its run duration, and has the more long life.Especially, by electrolyzer according to the present invention, can reduce the thickness of melt layer, result can not produce unstable, this unstable is for example that layer of liquid aluminium medium wave formation trend increases and the short circuit that causes, or the reoxidizing of the aluminium that forms, or the fluctuation of electrolytic cell voltage.Thereby according to the run duration of electrolyzer of the present invention, effectively avoided generally the ripple in layer of liquid aluminium to form, and realized energy-efficient, realize high stability and the reliability of electrolysis procedure simultaneously.Herein, if can be easy to regulate each other above-mentioned measure, just advantageous particularly, this measure is for making the current density homogenizing on negative electrode upside, particularly regulate width and/or the height of the independent longitudinal component of groove type cathode, so that with use conventional negative electrode the same, between the negative electrode using and anode, produce same groove volume in electrolyzer according to the present invention, even if to reduce be also like this to the distance between anode and layer of liquid aluminium.
According to a kind of particularly advantageous embodiment of the present invention, at least one fringe region of described negative electrode comprises at least two longitudinal components separately with different in width, wherein, fringe region pass through the longitudinal component that the shortest electric pathway is connected to its nearest tie point, there is the maximum width among all longitudinal components of fringe region.In this context, the nearest tie point of fringe region longitudinal component is the tie point between at least one bus, preferred at least two buses and following foreign current feed, and this foreign current feed is connected to the longitudinal component of negative electrode by the shortest electric pathway.Due in this embodiment, edge section is widened in the shortest longitudinal component of the electric pathway with nearest tie point, so compare with the resistance of other longitudinal component, the resistance of this longitudinal component of negative electrode increases, therefore, the electric current of this longitudinal component of negative electrode of flowing through reduces, and the electric current of other longitudinal component of negative electrode of flowing through increases, thereby at the independent longitudinal component of negative electrode, realize uniform electric current distribution.
In principle, a plurality of longitudinal components of described fringe region or there is the fringe region of different in width at least one of them can have constant width on longitudinal component separately, and/or the width of at least one longitudinal component can from its near longitudinal side of tie point recently to more at a distance longitudinally side diminish gradually.Preferably, all longitudinal components of fringe region or there is the constant width of the fringe region of different in width, so that fringe region of negative electrode or two fringe regions all (based on its width) become stepped appearance, or one-tenth step, or all longitudinal components of fringe region or have different in width fringe region width from longitudinal side of its more close nearest tie point to more at a distance longitudinally side diminish gradually.
If at least one fringe region of negative electrode comprises at least three longitudinal components separately with different in width, on all surfaces of negative electrode, realize electric current distribution especially uniformly, wherein, by be connected to each longitudinal component of nearest tie point than the longer electric pathway of another longitudinal component, all have than the less width of described another longitudinal component.Thereby the following impact of compensation especially effectively, from nearest tie point to the electrical path length of the longitudinal component impact on electric current separately of negative electrode fringe region.
According to of the present invention a kind of in addition preferred embodiment, the bottom section of described negative electrode comprises at least two longitudinal components separately with different in width, wherein, bottom section pass through the longitudinal component that the shortest electric pathway is connected to its nearest tie point, there is the minimum width among all longitudinal components of bottom section.Because the width of bottom section diminishes, so the resistance of this longitudinal component of negative electrode increases, thereby current segment ground is from wherein otherwise this longitudinal component that occurs maximum current is turned to, and enters the adjacent longitudinal component of negative electrode, to realize generally the homogenizing of current density on the surface of negative electrode.
In principle, in this embodiment of the present invention, one or more longitudinal components with the bottom section of different in width also can have even width on longitudinal component separately, and/or longitudinal side to the more remote longitudinally side that the width of at least one or more longitudinal component can be arranged to more close nearest tie point from it diminishes gradually.Similarly, in this embodiment of the present invention, preferably, the width of all longitudinal components with different in width of bottom section is all constant, so that the bottom section of negative electrode (based on its width) becomes stepped appearance, or one-tenth step, or longitudinal side to the more remote longitudinally side that the width of all longitudinal components with different in width of bottom section is arranged more close nearest tie point from it diminishes gradually.
Preferably, the bottom section of described negative electrode comprises at least three longitudinal components separately with different in width, wherein by the electric pathway longer than another longitudinal component, be connected to each longitudinal component of tie point nearest with it, all have than the larger width of described another longitudinal component.Thereby on the surface of negative electrode, realized extra high uniformity of current density.
In the development of inventive concept, propose, at least one fringe region of described negative electrode comprises at least two longitudinal components separately with different heights, wherein by the shortest electric pathway, be connected to the longitudinal component in the cathode edge region of nearest tie point, there is the maximum height among all longitudinal components of fringe region, from the downside of described negative electrode, determine described height.Thereby, compare with the resistance of other longitudinal component, the resistance of longitudinal component that is connected to the cathode edge region of nearest tie point by the shortest electric pathway increases, so that flow through, the electric current of this longitudinal component of negative electrode reduces, and the electric current of other longitudinal component of the negative electrode of flowing through increases, thereby at the independent longitudinal component of negative electrode, realize uniform electric current distribution.
Herein, above-mentioned embodiment also can combination with one another, for example more particularly, compare with the longitudinal component that is connected to nearest tie point by longer electric pathway, the fringe region that is connected to the negative electrode in the longitudinal component of nearest tie point by the shortest electric pathway has larger width and larger height.
In the further developing of inventive concept, the bottom section of described negative electrode can comprise at least two longitudinal components separately with different heights, wherein by the shortest electric pathway, be connected to the longitudinal component in the cathode bottom region of nearest tie point, there is the maximum height among all longitudinal components, from described negative electrode downside, determine described height.Similarly, in this embodiment of the present invention, realized the good especially electric current distribution homogenizing on cathode surface.
In principle, a plurality of longitudinal components with a fringe region of different heights, two fringe regions and/or bottom section, at least one of them can have even height in longitudinal component separately, and/or the height of at least one longitudinal component can diminish gradually from longitudinal side to the farther longitudinal side of distance of its more close nearest tie point.Preferably, the constant height with all longitudinal components of a fringe region of different heights, two fringe regions or bottom section, therefore a fringe region of negative electrode, two fringe regions or bottom section (based on its height) become stepped appearances or become step, or the height with all longitudinal components of a fringe region of different heights, a plurality of fringe region or bottom section, diminishes gradually from longitudinal side to the farther longitudinal side of distance of its more close nearest tie point.
Within the scope of the invention, same feasible is, while observing on the longitudinal direction of negative electrode, the height of negative electrode upside changes for fringe region and the bottom section of rightabout one or more longitudinal components, that is to say, for example the height of two of longitudinal component fringe regions is all greater than the height of the fringe region of adjacent longitudinal component, yet wherein compares with the bottom section of adjacent longitudinal component, and the height of the bottom section of this longitudinal component is less.Yet, preferably, the height of the fringe region of each longitudinal component of negative electrode and the parallel variation of the height of bottom section, that is to say, the fringe region of each longitudinal component of negative electrode and the height of bottom section, be all greater than or less than the fringe region of adjacent longitudinal component and those height of bottom section.
If the fringe region of described negative electrode comprises at least three longitudinal components separately with different heights, at negative electrode upside place, realized electric current distribution especially highly uniformly, wherein by the electric pathway longer than another longitudinal component, be connected to each longitudinal component of its nearest tie point, all have than the less height of described another longitudinal component.
For above-mentioned embodiment alternatively or for above-mentioned embodiment in addition preferably, the bottom section of described negative electrode can comprise at least three longitudinal components separately with different heights, wherein by the electric pathway longer than another longitudinal component, be connected to each longitudinal component of nearest tie point, all have than the less height of described another longitudinal component.Thereby in the bottom section by negative electrode cell body that upside forms, realized especially electric current distribution uniformly.
In following situation, can realize particularly advantageous electric current distribution, the maximum of at least one fringe region and the ratio of minimum width that are described negative electrode are 2:1 to 1.05:1, be preferably 1.5:1 to 1.05:1, 1.3:1 to 1.05:1 more preferably, and/or the maximum of at least one fringe region of described negative electrode and the ratio of minimum constructive height are 2:1 to 1.05:1, be preferably 1.5:1 to 1.05:1, 1.3:1 to 1.05:1 more preferably, and/or the maximum in described cathode bottom region and the ratio of minimum width are 2:1 to 1.05:1, be preferably 1.5:1 to 1.05:1, 1.3:1 to 1.05:1 more preferably, and/or the maximum in described cathode bottom region and the ratio of minimum constructive height are 2:1 to 1.05:1, be preferably 1.5:1 to 1.05:1, 1.3:1 to 1.05:1 more preferably.
In the embodiment of the present invention that the height of negative electrode upside changes on cathode length therein, preferably, poor between minimum constructive height in maximum height and this cathode edge region in described cathode edge region, and/or poor between minimum constructive height in maximum height and this cathode bottom region in this cathode bottom region, be less than 30cm, more preferably be less than 20cm, mostly even more preferably be most 10cm.Similarly, poor between minimum constructive height in maximum height and this cathode bottom region in this cathode edge region, mostly preferably is most 50% of the distance between vertex and this negative electrode downside on this negative electrode upside.
In the embodiment of the present invention that the width of fringe region or two fringe regions or bottom section changes on cathode length therein, while observing on this negative electrode whole extending longitudinally, poor between the maximum width of bottom section and the minimum width of bottom section, preferably be less than 30cm, more preferably be less than 20cm, be even more preferably less than 10cm.Similarly, while observing on this negative electrode whole extending longitudinally, poor between the maximum width of bottom section and the minimum width of bottom section, mostly preferably is most 20% of cathode length, mostly more preferably is most 10% of cathode length.
The development of concept according to the present invention, described electrolyzer comprise at least two in current feed mode the bus from negative electrode downside Contact cathod, wherein, foreign current feed or each foreign current feed are connected at least two buses conductively at tie point place separately, and described in current feed mode from least two buses layout parallel to each other of negative electrode downside Contact cathod and fixed distance each other, on whole width of negative electrode, extend, and in current feed mode from negative electrode downside Contact cathod, wherein independent bus is connected to running contact bar conductively by their end, or each end by them is connected to separated running contact bar conductively, and described one or more running contact bar is connected to one or more foreign current feeds conductively.
Alternatively, independent bus can be arranged parallel to each other and fixed distance each other, but can on whole width of negative electrode, not extend.For example, independent bus can only extend in approximately one half-width of negative electrode.In this embodiment, for example, when the width of negative electrode is observed, arrange continuously 2 buses, that is to say, bus is almost with many formation, each in these two buses of wherein being arranged continuously, by the end of its faces cathode, is connected to foreign current feed, can connect by running contact bar.In this embodiment, when the longitudinal direction of negative electrode is observed, only each in adjacent bus is connected to foreign current feed at tie point place separately naturally.
According to of the present invention a kind of in addition preferred embodiment, described electrolyzer comprises 2 to 60, preferably 10 to 48, more preferably 16 to 40, even more preferably 20 to 40, most preferably 36 buses, and 2 to 6 foreign current feeds, described bus layout parallel to each other and each other fixed distance, on whole width of negative electrode, extend, and in current feed mode from negative electrode downside Contact cathod.
Herein, for example, the negative electrode of described electrolyzer can be by 2 to 60, preferably 10 to 48, more preferably 16 to 40, even more preferably 20 to 40, most preferably 36 cathode blocks that are arranged side by side form, wherein each cathode block on its downside has at least one groove, and this groove extends on the longitudinal direction of cathode block or on the width of negative electrode, arranges at least one bus in described groove.
In order to improve further again the homogeneity of the electric current distribution on cathode surface, and particularly in order to prevent current density superelevation in the fringe region of negative electrode upside, in the middle proposition of further developing of concept of the present invention, the degree of depth that each groove part has rectangular cross section and changes in its length, wherein Yu Qi center is compared, and each groove part in its longitudinal side place has the more shallow degree of depth.While for example observing in the cross section at negative electrode, groove can have the form of fundamental triangle herein.
Particularly in order even also to realize being uniformly distributed of current density in the fringe region of negative electrode, in the development of concept of the present invention, propose, while observing in the cross section of negative electrode and on the width of negative electrode, at least one in two fringe regions of described negative electrode, preferably two fringe regions are towards the center of negative electrode, in downward-sloping mode, extend, wherein preferably, described fringe region or a plurality of fringe region angle of inclination are with respect to the horizontal plane 2 ° to 45 °, more preferably 3 ° to 20 °, even more preferably 10 ° to 15 °.
While preferably observing in the cross section of negative electrode and on the width of negative electrode herein, at least one in two fringe regions, preferred two fringe regions, to extend at least 30% of its width towards the downward-sloping mode of cathode center, preferably at least 50%, more preferably at least 75%, even more preferably 100%.Yet at least one fringe region also can essentially horizontally extend.
According to of the present invention a kind of in addition preferred embodiment, the bottom section of described negative electrode at least extends with planar fashion in lower area, wherein the surface of bottom section has-20 ° to 20 ° with respect to the plane of extending in vertical direction, and preferably-10 ° to 10 °, the more preferably angle of 0 °.
Preferably, while observing in the cross section at negative electrode, the upside of negative electrode is in groove shape mode, at at least 25% of cathode length, preferably at least 50%, particularly preferably at least 75%, more preferably at least 90%, most preferably from about form on 100%, wherein this cell body has two fringe regions and a bottom section, bottom section is disposed between fringe region, and while observing on the width at negative electrode, with respect to fringe region, reduce, wherein between each fringe region and bottom section in two fringe regions, the sidewall areas that connects corresponding fringe region and bottom section is set.
Herein preferably, i) bottom section and fringe region at least one of them width at least 25% of cathode length, preferably at least 50%, particularly preferably at least 75%, more preferably at least 90%, most preferably from about change on 100%, and/or ii) from the height of the upside of the definite negative electrode of the downside of negative electrode, at least 25% of cathode length, preferably at least 50%, particularly preferably at least 75%, more preferably at least 90%, most preferably from about change on 100%.
The invention still further relates to a kind of for electrolyzer, especially for the negative electrode of producing the electrolyzer of aluminium, wherein in the cross section of negative electrode, see, the upside of negative electrode is groove shape, wherein this cell body comprises two fringe regions and a bottom section, bottom section is disposed between fringe region, and while observing on the width at negative electrode, with respect to fringe region, reduce, wherein between each fringe region and bottom section in two fringe regions, the sidewall areas that connects corresponding fringe region and bottom section is set, i wherein) bottom section and fringe region at least one of them width in the length of negative electrode, change, and/or ii) from the height of the upside of the definite negative electrode of the downside of negative electrode, in the length of negative electrode, change.Above-mentioned preferred implementation about contained negative electrode in the electrolyzer according to the present invention, is also applicable to according to negative electrode of the present invention.
Accompanying drawing explanation
Below, with reference to accompanying drawing, the embodiment based on favourable, only describes the present invention as an example, wherein:
Fig. 1 illustrates according to the skeleton view of a part of negative electrode of the electrolyzer of one embodiment of the present invention,
Fig. 2 illustrates the broken section skeleton view of the cathode of electrolytic tank of another embodiment according to the present invention,
Fig. 3 a illustrates the broken section skeleton view of the cathode of electrolytic tank of another embodiment according to the present invention,
Fig. 3 b illustrates the frontview of the negative electrode of Fig. 3 a, and
Fig. 4 illustrates according to the orthographic plan of the electrolyzer of one embodiment of the present invention.
Embodiment
Fig. 1 illustrates according to the skeleton view of the negative electrode 10 of the electrolyzer of one embodiment of the present invention.
The negative electrode 10 being comprised of carbonaceous material has upside 12, during electrolyzer is for example according to Hall-Ai Lu process operation, and the layer of liquid aluminium of arranging electrolyzer on upside 12.In practice, a plurality of cathode blocks that negative electrode 10 is arranged side by side when observing on the longitudinal direction y at negative electrode form, and wherein the width x of each comfortable negative electrode 10 of longitudinal direction of cathode block is upper separately extends.Not shown bus in Fig. 1, bus, from the downside 14 of negative electrode, with current feed mode Contact cathod 10, and is connected at least one foreign current feed conductively.Herein preferably, each bus is inserted in groove, and groove is arranged in each cathode block, and extends on the width x of negative electrode 10, that is to say, on the longitudinal direction of respective cathode piece, extends.
As shown in fig. 1, while observing in the cross section at negative electrode 10, the upside 12 of negative electrode 10 is groove shape, wherein cell body has two fringe regions 16,16 ' and bottom section 18, bottom section 18 is disposed between fringe region 16,16 ', and while observing on the width x at negative electrode 10, with respect to fringe region 16,16 ', reduce, wherein between each fringe region and bottom section 18 in edge region 16,16 ', arrange and connect corresponding fringe region 16,16 ' and the sidewall areas 20,20 ' of bottom section 18.During electrolyzer is for example according to Hall-Ai Lu process operation, the sidewall areas 20,20 ' of fringe region 16,16 ', bottom section 18 and upside 12 is covered by layer of liquid aluminium.Herein preferably, set the fringe region 16,16 ', bottom section 18 of negative electrode 10 and sidewall areas 20,20 ' size, so that the volume of cell body, that is to say the upside of negative electrode 10 and the volume between anode downside, at least approx corresponding to the cell body volume with the electrolyzer of conventional conventional cathode.
While measuring on the width x of negative electrode 10, the fringe region 16,16 ' of the negative electrode 10 shown in Fig. 1 has width b, as shown in fig. 1, in the length that width b measures on the longitudinal direction y of negative electrode 10, changes.More particularly, the fringe region shown in Fig. 1 16,16 ' details have 5 longitudinal component L
1-L
5, wherein each fringe region 16,16 ' width b are at each longitudinal component L
1-L
5in all constant, and from longitudinal component L
1-L
5to longitudinal component L
1-L
5change, more particularly, so that produce herein the stepped variation of fringe region 16,16 ' width b, as observed on the longitudinal direction y at negative electrode 10.
Herein, it is symmetrical that the negative electrode 10 shown in Fig. 1 is parallel to respect to it middle fore-and-aft plane that longitudinal direction y extends, and thereby the width b of bottom section 18 also on the longitudinal direction y of negative electrode 10, change, fringe region 16,16 ' width are also like this.
The broken section skeleton view of the another kind of embodiment of cathode of electrolytic tank 10 shown in Figure 2.
The similar part of embodiment shown in this embodiment and Fig. 1 is, while observing in the cross section at negative electrode 10, negative electrode 10 is groove shape, wherein cell body has two fringe regions 16, left hand edge region is wherein only shown in the sectional view of Fig. 2, and cell body has bottom section 18, while observing on the width x of negative electrode 10, bottom section 18 is disposed between fringe region 16, and reduce with respect to fringe region 16, wherein, between each fringe region and bottom section 18, the sidewall areas 20 that connects corresponding fringe region 16 and bottom section 18 is set.Compare with the embodiment shown in Fig. 1, in the embodiment shown in Fig. 2, the width of edge and bottom section 16,18 does not change on the longitudinal direction y of negative electrode 10, but when the upper downside 14 from negative electrode 10 of z is measured in the vertical direction, the height h of the upside 12 of negative electrode 10 changes on the longitudinal direction y of negative electrode 10.More particularly, the details of the upside 12 of the negative electrode shown in Fig. 2 10 has three longitudinal component L
1-L
3, wherein the height h of the upside 12 of negative electrode 10 is at each longitudinal component L
1-L
3all constant in (on the longitudinal direction y of negative electrode 10), but from longitudinal component L
1-L
3to longitudinal component L
1-L
3change, more particularly, so that while observing on the longitudinal direction y at negative electrode 10 herein, the stepped variation that all produces the height h of negative electrode 10 upsides 12 in edge region 16 and in bottom section 18 and in sidewall areas 20.
As shown in Figure 2, while observing on the width x at negative electrode 10, fringe region 16 is inclined relative to horizontal angle ɑ, and in this situation, this angle is slightly less than 10 °.
Fig. 3 a illustrates the partial illustration of the perspective of a part of negative electrode 10 of another embodiment according to the present invention, this figure is to a great extent corresponding to the embodiment shown in Fig. 2, particularly, while observing on the longitudinal direction y at negative electrode 10, the height h of the upside 12 of negative electrode 10 changes; Yet, the negative electrode shown in Fig. 3 and different being shown in Fig. 2, on the one hand, the height h of fringe region 16, on the other hand, the height h of bottom section 18, changes in the opposite direction, and particularly the height h of fringe region 16 is from longitudinal component L
1extend to longitudinal component L
2upper increase of longitudinal direction y, and the height h of bottom section 18 upwards reduces the party.
Fig. 3 b illustrates when the front side of negative electrode 10 is observed the negative electrode details of Fig. 3 a longitudinal direction y, and example the changing inversely of height h of fringe region 16 and bottom section 18.Be shown in dotted line by the longitudinal component L of negative electrode 10 herein
1hiding longitudinal component L
2track.
Fig. 4 illustrates according to the orthographic plan of the electrolyzer of one embodiment of the present invention.Herein, in order not hide negative electrode 10 and to be disposed under described negative electrode and the view of the assembly on side, not shown anode construction and be connected to the current source part of anode construction.
In cross section, negative electrode 10 has the shape of groove, and this cell body comprises two fringe regions 16,16 ', comprises bottom section 18, and comprises the sidewall areas 20,20 ' being disposed between bottom section 18 and fringe region 16,16 '.Negative electrode 10 is own corresponding to the embodiment shown in Fig. 1 herein, and more particularly, particularly the negative electrode shown in Fig. 4 10 has a plurality of longitudinal component L
1to L
9, wherein independent fringe region 16,16 ' changes on the longitudinal direction y of negative electrode 10 with the width b of bottom section 18.
This electrolyzer comprises 9 strip buses 22,22 ', its each since the downside of negative electrode, with current feed mode Contact cathod 10, and separately by their longitudinal direction, in the upper extension of the width x of electrolyzer.This electrolyzer comprises two running contact bars 24,24 ' in addition, and running contact bar is disposed such, and these running contact bars 24,24 ' are connected to all bus 22,22 ' end separately separately.Therefore, running contact bar 24,24 ' is in the mode with respect to negative electrode 10 laterally offsets, and y extends along the longitudinal direction.
Each running contact bar 24,24 ' respectively associated two foreign current feeds 26,26 ' and 26 ", 26 " ', by foreign current feed 26,26 ' and 26 ", 26 " ', electric current is fed to the bus 22,22 ' being disposed in negative electrode 10 downsides 14 from outside.Herein, foreign current feed 26,26 ', 26 ", 26 " ' by tie point 28,28 ', 28 separately ", 28 " ' locate to be connected to running contact bar 24, one of 24 ', therefore also at this some place, be indirectly connected to bus 22,22 ', bus 22,22 ' is connected to described running contact bar 24,24 '.
As shown in Figure 4, independent tie point 28,28 ', 28 ", 28 " ' and negative electrode 10 in the distance between bus 22,22 ' entrance is different in length separately, that is to say, as follows electric pathway P
1-P
3length different, electric current must pass through electric pathway P
1-P
3, from independent tie point 28,28 ', 28 ", 28 " ' flow to independent bus 22,22 ' entrance, enter the fringe region 16,16 ' of negative electrode 10.Herein, with the longer electric pathway of having of negative electrode 10 to apart from longitudinal component L
1-L
9nearest tie point 28,28 ', 28 ", 28 " ' longitudinal component L
1-L
9compare, negative electrode 10 there is shorter electric pathway P
1-P
3extremely apart from longitudinal component L
1-L
9nearest tie point 28,28 ', 28 ", 28 " ' longitudinal component L
1-L
9, in its fringe region 16,16 ', there is larger width b.Similarly, with the longer electric pathway of having of negative electrode 10 to apart from longitudinal component L
1-L
9nearest tie point 28,28 ', 28 ", 28 " ' longitudinal component L
1-L
9compare, negative electrode 10 there is shorter electric pathway P
1-P
3extremely apart from longitudinal component L
1-L
9nearest tie point 28,28 ', 28 ", 28 " ' longitudinal component L
1-L
9, in its bottom section 18, there is less width b.
Reference numerals list
10 negative electrodes
12 upsides
14 downsides
16,16 ' fringe region
18 bottom sections
20,20 ' sidewall areas
22,22 ' bus
24,24 ' running contact bar
26,26 ', 26 ", 26 " ' foreign current feed
28,28 ', 28 ", 28 " ' tie point
X, y, z width, longitudinal and vertical direction
B width
L length
H height
L
1-L
9longitudinal component
P
1-P
3electric pathway
ɑ angle of inclination
Claims (18)
1. an electrolyzer, the electrolyzer especially for producing aluminium, comprising: negative electrode (10), be disposed in the layer of liquid aluminium on the upside (12) of described negative electrode (10), melt layer on it, the anode on described melt layer, at least one bus, preferred at least two buses (22, 22 '), described bus contacts described negative electrode (10) in current feed mode from negative electrode (10) downside (14), and at least one foreign current feed (26, 26 ', 26 ", 26 " '), wherein said at least one or each foreign current feed (26, 26 ', 26 ", 26 " ') at tie point (28 separately, 28 ', 28 ", 28 " ') locate to be connected to conductively at least one bus, preferably be connected at least two buses (22, 22 '), wherein in the cross section of described negative electrode (10), observe, the upside (12) of described negative electrode (10) is groove shape, and wherein said cell body has two fringe regions (16, 16 ') and one bottom section (18), described bottom section (18) is disposed in described fringe region (16, 16 ') between, and see in width (x) direction of described negative electrode (10), with respect to described fringe region (16, 16 ') reduce, wherein, at described two fringe regions (16, 16 '), between each fringe region in and described bottom section (18), arrange and connect corresponding fringe region (16, 16 ') and the sidewall areas (20 of described bottom section (18), 20 '), i wherein) described bottom section (18) and described fringe region (16, 16 ') at least the width of one of them (b) changes in the length of described negative electrode (10), and/or ii) height (h) of the upside (12) of the described negative electrode (10) determined from the downside (14) of described negative electrode (10) changes in the length of described negative electrode (10).
2. electrolyzer according to claim 1,
It is characterized in that,
At least one fringe region (16,16 ') of described negative electrode (10) comprises at least two longitudinal component (L separately with different in width (b)
1-L
9), wherein, described fringe region (16,16 ') pass through the shortest electric pathway (P
1-P
3) be connected to tie point nearest with it (28,28 ', 28 ", 28 " ') longitudinal component (L
1-L
9), there are all longitudinal component (L of described fringe region (16,16 ')
1-L
9) among maximum width (b).
3. according at least one the described electrolyzer in aforementioned claim,
It is characterized in that,
At least one fringe region (16,16 ') of described negative electrode (10) comprises at least three longitudinal component (L separately with different in width (b)
1-L
9), wherein pass through than another longitudinal component (L
1-L
9) longer electric pathway (P
1-P
3) be connected to nearest tie point (28,28 ', 28 ", 28 " ') each longitudinal component (L
1-L
9), all have than described another longitudinal component (L
1-L
9) less width (b).
4. according at least one the described electrolyzer in aforementioned claim,
It is characterized in that,
The bottom section (18) of described negative electrode (10) comprises at least two longitudinal component (L separately with different in width (b)
1-L
9), wherein, described bottom section (18) pass through the shortest electric pathway (P
1-P
3) be connected to tie point nearest with it (28,28 ', 28 ", 28 " ') longitudinal component (L
1-L
9), there are all longitudinal component (L of described bottom section (18)
1-L
9) among minimum width (b).
5. according at least one the described electrolyzer in aforementioned claim,
It is characterized in that,
The bottom section (18) of described negative electrode (10) comprises at least three longitudinal component (L separately with different in width (b)
1-L
9), wherein pass through than another longitudinal component (L
1-L
9) longer electric pathway (P
1-P
3) be connected to its nearest tie point (28,28 ', 28 ", 28 " ') each longitudinal component (L
1-L
9), all have than described another longitudinal component (L
1-L
9) larger width (b).
6. according at least one the described electrolyzer in aforementioned claim,
It is characterized in that,
At least one fringe region (16,16 ') of described negative electrode (10) comprises at least two longitudinal component (L separately with different heights (h)
1-L
9), wherein by the shortest electric pathway (P
1-P
3) be connected to nearest tie point (28,28 ', 28 ", 28 " ') the longitudinal component (L of described negative electrode (10) fringe region (16,16 ')
1-L
9), there are all longitudinal component (L of fringe region (16,16 ')
1-L
9) among maximum height (h), from the downside (14) of described negative electrode (10), determine described height (h), and/or the bottom section (18) of described negative electrode (10) comprises at least two longitudinal component (L separately with different heights (h)
1-L
9), wherein by the shortest electric pathway (P
1-P
3) be connected to described nearest tie point (28,28 ', 28 ", 28 " ') the longitudinal component (L of described negative electrode (10) bottom section (18)
1-L
9), there are all longitudinal component (L of bottom section (18)
1-L
9) among maximum height (h), from the downside (14) of described negative electrode (10), determine described height (h).
7. electrolyzer according to claim 6,
It is characterized in that,
The fringe region (16,16 ') of described negative electrode (10) comprises at least three longitudinal component (L separately with different heights (h)
1-L
9), wherein pass through than another longitudinal component (L
1-L
9) longer electric pathway (P
1-P
3) be connected to its nearest tie point (28,28 ', 28 ", 28 " ') each longitudinal component (L
1-L
9), all have than described another longitudinal component (L
1-L
9) less height (h), and/or the bottom section (18) of described negative electrode (10) comprises at least three longitudinal component (L separately with different heights (h)
1-L
9), wherein pass through than another longitudinal component (L
1-L
9) longer electric pathway (P
1-P
3) be connected to nearest tie point (28,28 ', 28 ", 28 " ') each longitudinal component (L
1-L
9), all have than described another longitudinal component (L
1-L
9) less height (h).
8. according at least one the described electrolyzer in aforementioned claim,
It is characterized in that,
The maximum of at least one fringe region (16,16 ') of described negative electrode (10) and the ratio of minimum width (b) they are 2:1 to 1.05:1, are preferably 1.5:1 to 1.05:1,1.3:1 to 1.05:1 more preferably, and/or
The maximum of at least one fringe region (16,16 ') of described negative electrode (10) and the ratio of minimum constructive height (h) they are 2:1 to 1.05:1, are preferably 1.5:1 to 1.05:1,1.3:1 to 1.05:1 more preferably, and/or
The maximum of the described bottom section (18) of described negative electrode (10) and the ratio of minimum width (b) they are 2:1 to 1.05:1, are preferably 1.5:1 to 1.05:1,1.3:1 to 1.05:1 more preferably, and/or
The maximum of the described bottom section (18) of described negative electrode (10) and the ratio of minimum constructive height (h) are 2:1 to 1.05:1, are preferably 1.5:1 to 1.05:1, more preferably 1.3:1 to 1.05:1.
9. according at least one the described electrolyzer in aforementioned claim,
It is characterized in that,
In current feed mode, from negative electrode (10) downside (14), contact at least one bus of described negative electrode (10), at least two buses (22 preferably, 22 '), layout parallel to each other and each other fixed distance, the upper extension of whole width (b) at described negative electrode (10), and from negative electrode (10) downside (14), contact described negative electrode (10) in current feed mode, wherein independent bus is connected to running contact bar separately conductively by their end, or each end by them is connected to separated running contact bar (24 separately conductively, 24 '), and described one or more running contact bar (24, 24 ') be connected to conductively one or more foreign current feeds (26, 26 ', 26 ", 26 " ').
10. according at least one the described electrolyzer in aforementioned claim,
It is characterized in that,
Described electrolyzer comprises 2 to 60, preferably 10 to 48, more preferably 16 to 40, even more preferably 20 to 40,36 buses (22,22 ') most preferably, with 2 to 6 foreign current feeds (26,26 ', 26 ", 26 " '), described bus (22,22 ') layout parallel to each other and each other fixed distance, extension on whole width (b) of described negative electrode (10), and from negative electrode (10) downside (14), contact described negative electrode (10) in current feed mode.
11. according at least one described electrolyzer in aforementioned claim,
It is characterized in that,
Described negative electrode (10) is by 2 to 60, preferably 10 to 48, more preferably 16 to 40, even more preferably 20 to 40, most preferably 36 cathode blocks that are arranged side by side form, wherein each cathode block on its downside has at least one groove, and described groove, in longitudinal direction or the upper extension of the width (x) in described negative electrode (10) of described cathode block, is arranged at least one bus (22,22 ') in described groove.
12. electrolyzers according to claim 11,
It is characterized in that,
The degree of depth that described in each, groove part has rectangular cross section and changes in its length, wherein compares with the center, and each groove part in its longitudinal side place has the more shallow degree of depth.
13. according at least one described electrolyzer in aforementioned claim,
It is characterized in that,
When the upper observation of width (x) of described negative electrode (10), at least one in two fringe regions (16,16 '), preferably two fringe regions (16,16 ') are towards the center of described negative electrode (10), in downward-sloping mode, extend, wherein preferably, a described fringe region (16,16 ') or a plurality of fringe region (16,16 ') angle of inclination (ɑ) is with respect to the horizontal plane 2 ° to 45 °, more preferably 3 ° to 20 °, even more preferably 10 ° to 15 °.
14. according at least one described electrolyzer in aforementioned claim,
It is characterized in that,
In the cross section of described negative electrode (10) and when the upper observation of width (x) of described negative electrode (10), at least one in described two fringe regions (16,16 '), preferred two fringe regions (16,16 '), to extend at least 30% of its width (b) towards the downward-sloping mode in described negative electrode (10) center, preferably at least 50%, more preferably at least 75%, even more preferably 100%.
15. according at least one described electrolyzer in aforementioned claim,
It is characterized in that,
Described bottom section (18) at least extends with planar fashion in lower area, the surface of wherein said bottom section (18) has-20 ° to 20 ° with respect to plane of (z) upper extension in the vertical direction, preferably-10 ° to 10 °, the more preferably angle of 0 °.
16. according at least one described electrolyzer in aforementioned claim,
It is characterized in that,
While observing in the cross section in described negative electrode (10), the upside (12) of described negative electrode (10) is at least 25% of described negative electrode (10) length, preferably at least 50%, particularly preferably at least 75%, more preferably at least 90%, be most preferably from about groove shape on 100%, wherein said cell body has two fringe regions (16, 16 ') and one bottom section (18), described bottom section (18) is disposed in described fringe region (16, 16 ') between, and when the upper observation of the width in described negative electrode (10) (x), with respect to described fringe region (16, 16 ') reduce, wherein at described two fringe regions (16, 16 ') between each fringe region in and described bottom section (18), arrange and connect corresponding fringe region (16, 16 ') and the sidewall areas (20 of described bottom section (18), 20 ').
17. electrolyzers according to claim 16,
It is characterized in that,
I) described bottom section (18) and described fringe region (16,16 ') at least one of them width (b) at least 25% of described negative electrode (10) length, preferably at least 50%, particularly preferably at least 75%, more preferably at least 90%, most preferably from about change on 100%, the height (h) of the upside (12) of the described negative electrode (10) of and/or ii) determining from the downside (14) of described negative electrode (10), in at least 25% of described negative electrode (10) length, preferably at least 50%, particularly preferably at least 75%, more preferably at least 90%, most preferably from about change on 100%.
18. 1 kinds for electrolyzer, especially for the negative electrode of producing the electrolyzer of aluminium, wherein in the cross section of described negative electrode (10), observe, the upside (12) of described negative electrode (10) is groove shape, wherein said cell body has two fringe regions (16, 16 ') and one bottom section (18), described bottom section (18) is disposed in described fringe region (16, 16 ') between, and when the upper observation of the width in described negative electrode (10) (x), with respect to described fringe region (16, 16 ') reduce, wherein at described two fringe regions (16, 16 ') between each fringe region in and described bottom section (18), arrange and connect corresponding fringe region (16, 16 ') and the sidewall areas (20 of described bottom section (18), 20 '), i wherein) described bottom section (18) and described fringe region (16, 16 ') at least the width of one of them (b) changes in the length of described negative electrode (10), the height (h) of the upside (12) of the described negative electrode (10) of and/or ii) determining from the downside (14) of described negative electrode (10) changes in the length of described negative electrode (10).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201110086040 DE102011086040A1 (en) | 2011-11-09 | 2011-11-09 | Electrolysis cell, in particular for the production of aluminum, with a trough-shaped cathode |
| DE102011086040.1 | 2011-11-09 | ||
| PCT/EP2012/072170 WO2013068485A1 (en) | 2011-11-09 | 2012-11-08 | Electrolytic cell, in particular for producing aluminum, having a tub-shaped cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103958739A true CN103958739A (en) | 2014-07-30 |
Family
ID=47221338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280055258.0A Pending CN103958739A (en) | 2011-11-09 | 2012-11-08 | Electrolytic cell, in particular for producing aluminum, having a tub-shaped cathode |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP2776609A1 (en) |
| JP (1) | JP2014532817A (en) |
| CN (1) | CN103958739A (en) |
| CA (1) | CA2854937A1 (en) |
| DE (1) | DE102011086040A1 (en) |
| IN (1) | IN2014CN03393A (en) |
| RU (1) | RU2014123000A (en) |
| WO (1) | WO2013068485A1 (en) |
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| SE347767B (en) * | 1968-03-26 | 1972-08-14 | Montedison Spa | |
| WO1998053120A1 (en) * | 1997-05-23 | 1998-11-26 | Moltech Invent S.A. | Aluminium production cell and cathode |
| EP1233083A1 (en) * | 2001-02-14 | 2002-08-21 | Alcan Technology & Management AG | Carbon bottom of electrolysis cell used in the production of aluminum |
| DE102010039638B4 (en) * | 2010-08-23 | 2015-11-19 | Sgl Carbon Se | Cathode, apparatus for aluminum extraction and use of the cathode in aluminum production |
| DE102011004010A1 (en) * | 2011-02-11 | 2012-08-16 | Sgl Carbon Se | Cathode arrangement with a surface profiled cathode block with a groove of variable depth |
-
2011
- 2011-11-09 DE DE201110086040 patent/DE102011086040A1/en not_active Withdrawn
-
2012
- 2012-11-08 IN IN3393CHN2014 patent/IN2014CN03393A/en unknown
- 2012-11-08 JP JP2014540469A patent/JP2014532817A/en not_active Withdrawn
- 2012-11-08 RU RU2014123000/02A patent/RU2014123000A/en not_active Application Discontinuation
- 2012-11-08 EP EP12790471.2A patent/EP2776609A1/en not_active Withdrawn
- 2012-11-08 CN CN201280055258.0A patent/CN103958739A/en active Pending
- 2012-11-08 WO PCT/EP2012/072170 patent/WO2013068485A1/en active Application Filing
- 2012-11-08 CA CA2854937A patent/CA2854937A1/en not_active Abandoned
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|---|---|---|---|---|
| WO1999002764A1 (en) * | 1997-07-08 | 1999-01-21 | Moltech Invent S.A. | A drained cathode cell for the production of aluminium |
| CN101432466A (en) * | 2006-04-13 | 2009-05-13 | Sgl碳股份公司 | Cathodes for aluminium electrolysis cell with non-planar slot design |
| CN101054691A (en) * | 2007-03-02 | 2007-10-17 | 冯乃祥 | Abnormal cathode carbon block structure aluminum electrolysis bath |
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| CN201873762U (en) * | 2010-11-26 | 2011-06-22 | 贵阳铝镁设计研究院 | Cathode block with protective cover |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014532817A (en) | 2014-12-08 |
| IN2014CN03393A (en) | 2015-07-03 |
| DE102011086040A1 (en) | 2013-05-16 |
| EP2776609A1 (en) | 2014-09-17 |
| WO2013068485A1 (en) | 2013-05-16 |
| RU2014123000A (en) | 2015-12-20 |
| CA2854937A1 (en) | 2013-05-16 |
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Application publication date: 20140730 |