CN106987865A - The cathode construction of horizontal current in a kind of reduction aluminium cell - Google Patents
The cathode construction of horizontal current in a kind of reduction aluminium cell Download PDFInfo
- Publication number
- CN106987865A CN106987865A CN201710372930.3A CN201710372930A CN106987865A CN 106987865 A CN106987865 A CN 106987865A CN 201710372930 A CN201710372930 A CN 201710372930A CN 106987865 A CN106987865 A CN 106987865A
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- cathode
- insulating materials
- carbon pieces
- aluminium
- cathode carbon
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- C—CHEMISTRY; METALLURGY
- 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
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
-
- C—CHEMISTRY; METALLURGY
- 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
- C25C3/16—Electric current supply devices, e.g. bus bars
Abstract
The present invention discloses a kind of cathode construction of horizontal current in reduction aluminium cell, pass through the level that one layer or two layers is added in cathode carbon pieces, insulating materials that is vertical or having certain angle of inclination, change electric current and the path of cathode carbon pieces is entered from aluminium liquid, so as to reach the purpose of horizontal current in reduction aluminium liquid.It is an advantage of the invention that：By adding insulating materials in cathode carbon pieces, the horizontal current in aluminium cell is significantly reduced, so as to effectively reduce the fluctuation of aluminium liquid, lowered consumption for energy saving of electrolytic production of aluminium, and method is simple and easy to apply, without carrying out larger change to existing cell construction, investment is changed less.
Description
Technical field
The present invention relates to aluminium cell technical field, and in particular to the negative electrode knot of horizontal current in a kind of reduction aluminium cell
Structure.
Background technology
At present, industrial aluminium metallurgy still uses traditional Hall-Ai Lu aluminum electrolysis process, production electrolytic aluminium for large-scale pre-baked aluminium
Electrolytic cell, in aluminium cell, powerful direct current enters anode rod from anode bus, electric current from anode rod it is vertical to
Under, anode carbon block and electrolyte, aluminium liquid and cathode carbon pieces are passed through with this, is finally collected by the cathode steel bar of horizontal positioned and imported into
In negative busbar.Due to cathode steel bar horizontal positioned, electric current is caused to have the change compared with general orientation in a cell, wherein in resistance
Larger horizontal current component is generated in the smaller aluminium liquid of rate.Horizontal current and vertical magnetic field are acted so that aluminium liquid
Produce larger fluctuation.This is that aluminium cell production brings inconvenience.The fluctuation of aluminium liquid can be difficult to control to pole span, and pole span is too
The small secondary oxidation that may cause aluminium cell partial short-circuit and accelerate aluminium liquid, causes the reduction of current efficiency.And pole span is excessive
The tank voltage of electrolytic cell can be increased, increase energy resource consumption.So reducing the horizontal current in aluminium liquid, for preferably control aluminium electricity
The pole span in groove is solved, increase current efficiency and reduction ton aluminium energy consumption have great importance.
In recent years, there are many methods on improving horizontal current in aluminium liquids both at home and abroad, these methods are all to concentrate on pair
The improvement of cathode steel bar.Cracked by using double rod irons, rod iron, the technology such as vertical rod iron, special-shaped rod iron.In Chinese patent application
A kind of method for reducing horizontal current in aluminium cell is disclosed in CN102453927A, pricks solid or casts in cathode carbon pieces bottom
At least one cathode steel bar, cathode steel bar elongatedness direction close to one section of cathode carbon pieces end be divided into by partitioning slot above and below
Two parts, one end that cathode steel bar is not split in cathode carbon pieces center section is all connected using electric conductor with cathode carbon pieces to be leaned on
The cathode steel bar top half of nearly cathode carbon pieces end is connected using electric conductor with cathode carbon pieces, the latter half use insulator and
Cathode carbon pieces are insulated, and horizontal current in aluminium liquid is reduced by this structure.However, this is to concentrate on the improvement to cathode steel bar,
In aluminium cell, due to there is very big electric current in rod iron, change is done near rod iron can occur the electric current in rod iron
Large change, makes rod iron nearby and larger change occurs for cathode temperature, is that the thermal balance of aluminium electrolytic cell cathode is brought
New challenge, is that the insulation of aluminium cell bottom land also brings new requirement, it is necessary to carry out substantial amounts of improvement to electrolytic cell, increases
New difficulty, increases cost of investment.
Single cathode carbon pieces are divided into multiple smaller cathode carbon pieces, bundle paste of pasting and insulate is pricked using conduction and connects each negative electrode charcoal
Block can also reduce the horizontal current in aluminium liquid, but this method changes relatively large, the required precision of installation to electrolytic cell
Also it is of a relatively high, if Rig up error, it can make it that electrolytic cell local current is excessive, cause stress concentration so that electrolytic cell is damaged.
The content of the invention
To solve above-mentioned technical barrier, the present invention provides a kind of cathode construction of horizontal current in reduction aluminium cell, led to
Cross in cathode carbon pieces pitch-based sphere direction, vertical direction or the insulating materials with certain angle of inclination change electric current from
Aluminium liquid enters the path of cathode carbon pieces, so as to reduce difference when electric current enters cathode carbon pieces from aluminium liquid, reaches reduction
The purpose of horizontal current in aluminium liquid.
Concrete technical scheme is as follows：
The cathode construction of horizontal current in a kind of reduction aluminium cell, including cathode carbon pieces, insulating materials, connection prick paste and
Cathode steel bar, the cathode carbon pieces and cathode steel bar are by connecting pitch-based sphere direction in bundle paste connection, the cathode carbon pieces, erecting
Nogata to or with certain angle of inclination insulating materials.
The one or more that paste is pasted the bottom of for, fiddled with paste or the phosphorus pig iron are pricked in the connection.
The insulating materials is located above cathode steel bar in the cathode carbon pieces of current output terminal.
The insulating materials is the one or more in high-temperature cement, refractory brick, carborundum.
The insulating materials is one layer or two layers；When the insulating materials is horizontal direction two layers, two layers can be positioned at same
One horizontal plane or different level；When the insulating materials is vertical direction two layers, same vertical plane or difference can be located at two layers
Vertical plane.
The height of the cathode carbon pieces is 420~650mm, and the height of the cathode steel bar is 50~200mm, the insulation
The thickness of material is 5~40mm, and length is 50~500mm.
This method have the advantage that：
By being cracked in cathode carbon pieces sidepiece, increase cathode carbon pieces sidepiece resistance, reduce the electric current that carbon block sidepiece passes through, make
More current is obtained by carbon block center (groove center), favorable influence is produced to electrolytic cell：
1st, the horizontal current in aluminium liquid can be substantially reduced；
2nd, the resistance of cathode carbon pieces can be increased by being cracked in carbon block so that electric current produces more heat by cathode carbon pieces
Amount, is conducive to the insulation of cathode carbon pieces；
3rd, cathode carbon pieces place of cracking will not produce current convergence, the situation of hot-spot；
4th, cracked addition insulating materials in cathode carbon pieces, slotted technique is ripe easily to be implemented, be not required to produce existing aluminium cell
Raw larger change, saves and changes investment；
5th, the required precision installed is not high, it is to avoid because Rig up error causes electrolytic cell local current excessive, cause stress
Concentrate, electrolytic cell is damaged.
Brief description of the drawings
Fig. 1 is current path schematic diagram in traditional aluminium cell；
Fig. 2 is traditional cathode structure of aluminium cell schematic diagram；
Fig. 3 is cathode construction schematic diagram of the present invention using one layer of level insulation material；
Fig. 4 is the present invention using current path schematic diagram in one layer of level insulation material aluminium cell；
Fig. 5 is cathode construction schematic diagram of the present invention using one layer of vertical insulating materials；
Fig. 6 is cathode construction schematic diagram of the present invention using the insulating materials with certain angle of inclination；
Fig. 7 is cathode construction schematic diagram of the present invention using two layers of level insulation material；
Fig. 8 is cathode construction schematic diagram of the present invention using two layers of vertical insulating materials；
Fig. 9 is the present invention using current path schematic diagram in two layers of level insulation material aluminium cell；
Figure 10 is traditional cathode structure of aluminium cell with adding one layer of level insulation material, two layers of level insulation in the present invention
Horizontal current density profiles versus schemes in the cathode structure of aluminium cell aluminium liquid of material.
In figure, 1-cathode carbon pieces；2-insulating materials；Paste is pricked in 3-connection；4-cathode steel bar.
Embodiment
With reference to specific embodiment, the present invention is described in detail, but protection scope of the present invention is not by embodiment institute
Limit.
Embodiment 1：
Fig. 3 is cathode construction schematic diagram of the present invention using one layer of level insulation material, and Fig. 4 is the present invention using one layer of water
Current path schematic diagram in flat insulating materials cell cathode carbon block.
As shown in figure 4, cathode construction pricks paste 3 by cathode carbon pieces 1, insulating materials 2, connection and cathode steel bar 4 is constituted.Negative electrode
The height of carbon block 1 is 420~650mm, and the height of cathode steel bar 4 is 65~200mm, in the cathode carbon pieces above rod iron
Pitch-based sphere insulating materials 2.The thickness of insulating materials is 5~20mm, and the length of insulating materials is 50~500mm.Such a structure
Make electric current from close to sidepiece cathode carbon pieces enter rod iron in path it is elongated, resistance increase, promote more electric currents from by
Cathode carbon pieces in the middle of near are entered in rod iron, so as to reach the purpose of horizontal current in reduction aluminium liquid.
Embodiment 2：
Fig. 5 is cathode construction schematic diagram of the present invention using one layer of vertical insulating materials, by cathode carbon pieces 1, insulating materials
2nd, paste 3 is pricked in connection and cathode steel bar 4 is constituted.In the present embodiment, the height of cathode carbon pieces 1 is 420~650mm, cathode steel bar 4
It is highly 65~200mm, one layer of vertical insulating materials 2 is added in the cathode carbon pieces above rod iron.The thickness of insulating materials
Spend for 5~20mm, the length of insulating materials is 50~300mm.Such a structure makes to enter the electric current close to middle cathode carbon pieces
It can not enter in the cathode carbon pieces of sidepiece, so as to reach the purpose of horizontal current in reduction aluminium liquid.
Embodiment 3：
Fig. 7 is cathode construction schematic diagram of the present invention using two layers of level insulation material, and Fig. 9 is the present invention using two layers of water
Current path schematic diagram in flat insulating materials cell cathode carbon block, Figure 10 is traditional cathode structure of aluminium cell and the present invention
It is middle using horizontal current density point in one layer of level insulation material, the cathode structure of aluminium cell aluminium liquid of two layers level insulation material
Cloth comparison diagram.In the present embodiment, the height of cathode carbon pieces 1 is 420~650mm, and the height of cathode steel bar 4 is 65~200mm,
Multiple level insulation materials 2 are added in the cathode carbon pieces above rod iron.The thickness of insulating materials is 5~20mm, insulation material
The length of material is 50~300mm.These insulating materials may be at same horizontal plane, can also be in different horizontal planes.
Such a structure makes path of the electric current from rod iron is entered close to the cathode carbon pieces of sidepiece elongated, resistance increase, promotes more
Electric current close to middle cathode carbon pieces from rod iron is entered, so as to reach the purpose of horizontal current in reduction aluminium liquid.
The present invention can significantly reduce the horizontal current density in aluminium liquid, effectively horizontal current in reduction aluminium liquid, and letter
It is single easily to perform, larger change will not be produced to aluminium cell, reduces the expense needed for transforming existing aluminium cell.
Claims (6)
1. a kind of reduce the cathode construction of horizontal current in aluminium cell, it is characterised in that：Including cathode carbon pieces, insulating materials,
Paste and cathode steel bar are pricked in connection, and the cathode carbon pieces and cathode steel bar are added by connecting to prick in paste connection, the cathode carbon pieces
Horizontal direction, vertical direction or the insulating materials with certain angle of inclination.
2. cathode construction according to claim 1, it is characterised in that：The connection pricks paste and is pasted the bottom of for, fiddles with paste or the phosphorus pig iron
In one or more.
3. cathode construction according to claim 1, it is characterised in that：The insulating materials be located at cathode steel bar above close to go out
In the cathode carbon pieces at electric end.
4. cathode construction according to claim 1, it is characterised in that：The insulating materials is high-temperature cement, refractory brick, carbonization
One or more in silicon.
5. cathode construction according to claim 1, it is characterised in that：The insulating materials is one layer or two layers；It is described exhausted
When edge material is horizontal direction two layers, same level or different level can be located at two layers；The insulating materials is vertical side
During to two layers, two layers can be positioned at same vertical plane or different vertical planes.
6. cathode construction according to claim 1, it is characterised in that：The height of the cathode carbon pieces is 420~650mm, institute
The height for stating cathode steel bar is 50~200mm, and the thickness of the insulating materials is 5~40mm, and length is 50~500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710372930.3A CN106987865A (en) | 2017-05-24 | 2017-05-24 | The cathode construction of horizontal current in a kind of reduction aluminium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710372930.3A CN106987865A (en) | 2017-05-24 | 2017-05-24 | The cathode construction of horizontal current in a kind of reduction aluminium cell |
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|---|---|
| CN106987865A true CN106987865A (en) | 2017-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710372930.3A Pending CN106987865A (en) | 2017-05-24 | 2017-05-24 | The cathode construction of horizontal current in a kind of reduction aluminium cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763145A (en) * | 2019-03-07 | 2019-05-17 | 合肥工业大学 | The cathode construction of horizontal current in a kind of reduction aluminium cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795540A (en) * | 1987-05-19 | 1989-01-03 | Comalco Aluminum, Ltd. | Slotted cathode collector bar for electrolyte reduction cell |
| CN202047141U (en) * | 2011-04-15 | 2011-11-23 | 湖南中大业翔科技有限公司 | Non-uniformly conductive cathode structure for aluminum electrolytic cell |
| CN102453927A (en) * | 2010-10-19 | 2012-05-16 | 沈阳铝镁设计研究院有限公司 | Method for greatly reducing horizontal current in aluminum liquid of aluminum electrolytic cell |
| CN103422121A (en) * | 2012-05-22 | 2013-12-04 | 天津市煜德隆铝业制造有限公司 | Method for decreasing level current of electrolytic cell |
-
2017
- 2017-05-24 CN CN201710372930.3A patent/CN106987865A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795540A (en) * | 1987-05-19 | 1989-01-03 | Comalco Aluminum, Ltd. | Slotted cathode collector bar for electrolyte reduction cell |
| CN102453927A (en) * | 2010-10-19 | 2012-05-16 | 沈阳铝镁设计研究院有限公司 | Method for greatly reducing horizontal current in aluminum liquid of aluminum electrolytic cell |
| CN202047141U (en) * | 2011-04-15 | 2011-11-23 | 湖南中大业翔科技有限公司 | Non-uniformly conductive cathode structure for aluminum electrolytic cell |
| CN103422121A (en) * | 2012-05-22 | 2013-12-04 | 天津市煜德隆铝业制造有限公司 | Method for decreasing level current of electrolytic cell |
Non-Patent Citations (1)
| Title |
|---|
| WENJU TAO ET AL.,: ""Impact of the Usage of a Slotted Cathode Carbon Block on thermoelectric Field in an Aluminum Reduction Cell"", 《THE MINERALS, METALS & MATERIALS SOCIETY》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763145A (en) * | 2019-03-07 | 2019-05-17 | 合肥工业大学 | The cathode construction of horizontal current in a kind of reduction aluminium cell |
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Application publication date: 20170728 |
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