CN106661747A - Side insulation coating for an electrolytic cell - Google Patents
Side insulation coating for an electrolytic cell Download PDFInfo
- Publication number
- CN106661747A CN106661747A CN201580034926.5A CN201580034926A CN106661747A CN 106661747 A CN106661747 A CN 106661747A CN 201580034926 A CN201580034926 A CN 201580034926A CN 106661747 A CN106661747 A CN 106661747A
- Authority
- CN
- China
- Prior art keywords
- electrolyzer
- thermal insulation
- wedging
- inward
- pot shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C25C3/085—Cell construction, e.g. bottoms, walls, cathodes characterised by its non electrically conducting heat insulating parts
-
- 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
Abstract
The invention relates to an electrolytic cell (100) which includes a box (200) comprising side walls (3), and a side insulation coating covering the side walls (3), the side insulation coating including: thermally insulating elements (1) made of compressible material; bracing elements (2) made of refractory material having at least one side surface, the thermally insulating elements (1) and the bracing elements (2) being affixed in an alternating manner against at least one side wall (3) of the box (200); and inner facing blocks (5) arranged such that each inner facing block (5) bears against the side surface of at least two bracing elements (2). The side insulation coating can also include protection elements (4) made of refractory material or outer facing panels (6).
Description
The present invention relates to be used for the electrolyzer (cuve d ' é lectrolyse) by electrolytic production of aluminum.
By convention, aluminum is produced in aluminium manufacturer by electrolysis using Hall-He Lute (Hall-H é roult) method.For
This, there is provided electrolyzer (cuve d ' é lectrolyse), the electrolyzer includes the liner of pot shell (caisson) and refractory material
In.Electrolyzer also includes cathode block, and cathode block is disposed in the bottom of pot shell, by being designed to collect Faradaic current so as to by electricity
Solution electric current is directed to the contact rod of next electrolyzer and passes through.Electrolyzer also includes being suspended to anode superstructure (such as, post and laterally
Component) at least one anode block, the anode block is partially immersed in electrobath, is on cathode block.With react into
OK, the layer of liquid aluminium of a covered cathode block is formed below in electrobath.Electric current is via anode block, electrobath and metal level from sun
To negative electrode, aluminium oxide is dissolved pole framework stream in the electrobath that temperature is of about 970 DEG C.In order to limit the change due to electrobath
Learn the corrosion that component and its temperature are caused to the wall of pot shell, it is known to use by be suspended on the inside liner of pot shell by
Inward-facing block made by carbonaceous material.However, despite the presence of these inward-facing blocks and inside liner, by the heat of chamber wall
Loss is still very big, and this is harmful to the appropriate operation of total energy efficiency, the life-span in pond and electrolytic process.
One object of the present invention is intended to overcome this shortcoming.For this purpose, the invention provides a kind of electrolyzer, the electrolyzer quilt
It is designed to comprising an electrobath, the electrolyzer includes that one has the pot shell of side wall and covers the lateral insulation lining of the side wall
In, the lateral insulation lining includes：
The thermal insulation element by made by compressible material,
It is with least one side, wedge by made by refractory material element, the thermal insulation element and the wedging
Element is alternately fixed against at least one side wall of the pot shell, and
Inward-facing block, the inward-facing block is arranged to the pot shell, the heat insulation unit for protecting the electrobath
Part and the wedging element, two adjacent the distance between elements of wedging are adapted so that each inward-facing block supporting is supported
By the side of at least two wedging elements.
In this configuration, the wall of the pot shell is by made by compressible material with thermal insulation element can partly covering, institute
State that thermal insulation element greatly limit thermal losses and protector shell wall is from the big calorimetric generated by electrobath and liquid aluminium
Amount affects.Additionally, be inserted in the fire resisting wedging element by made by compressible material between thermal insulation element to be used to building
The compression to the thermal insulation element is restricted or prevented during with the operation pond, without being formed the conduction of heat of pot shell wall will be harmful to
Bridge.The thermal insulation element without undergoing the harmful compression between the side wall and inward-facing block of the pot shell, therefore they not by
Crush and keep their thermal insulation capabilities.Therefore, the use of thermal insulation element can be with this by made by compressible material
Mode limits the cost of raw material and device and realizes thermal balance improving and easily adjusting.
Thermal insulation element made by compressible material it is meant that do not exist wedging element in the case of, pond manufacture or
During operation, by by inward-facing block crushing and therefore any element degenerated.Thermal insulation element can made by compressible material
To be inflatable structure, fiber is based especially on.
Advantageously, the thickness that each wedging element has is equal to or more than the thickness of the thermal insulation element.
Advantageously, the lateral insulation lining also includes being arranged in by made by refractory material thermal insulation element and inward-facing
Block between protection element.It is inward-facing that these protection elements protect the thermal insulation element being arranged in below to pass through from electrobath
The possible of block be impregnated with (impr é gnation) so as to it is heat-insulating protection be reinforced over time.
Space protection element according to an arrangement, between two adjacent wedging elements.In this configuration, it is described
Protection element does not cover the wedging element but only covers the thermal insulation element.
Preferably, each wedging element is with the combination thickness of a thermal insulation element and a protection element generally
Identical thickness so that the thermal insulation element avoids compression.This arrangement within the whole life-span of groove therefore, it is possible to maintaining by can
The intensity and thermal insulation capabilities of thermal insulation element made by compression material.
Coefficient of thermal insulation and the protection of the coefficient of thermal insulation that the thermal insulation element has more than the wedging element
The coefficient of thermal insulation of element.In this manner it is possible to using thin thermal insulation element.The presence of which is to the residual body inside pot shell
Product has very little impact, to realize effective heat insulation.These elements are therefore, it is possible to reducing the heat of the side-walls of pot shell
Loss, without reducing the size that is present in cathode block in pot shell and therefore reducing the efficiency of electrolytic process.
Advantageously, the length of each thermal insulation element for measuring along the longitudinal axis of the corresponding wall of pot shell is more than each
The length of wedging element.This layout optimization heat insulation of pot shell and limit heat bridge.
Typically, the length of each thermal insulation element for measuring along the longitudinal axis of the corresponding wall of pot shell is than each wedge
The length for entering element is at least four times larger.
Preferably, the lateral insulation lining also includes the plate for facing out, and the advantageously described plate for facing out is by carborundum
(SiC) make, the plate for facing out extends and be arranged in the wedging against at least one side wall of the pot shell
Element, the thermal insulation element and protection element top alignment described in appropriate circumstances.Therefore these plates are protected from above
Protect the thermal insulation element and protect pot shell from infection.They additionally aid partly and controlled at the surface for selecting
Remove heat.
Advantageously, the plate that each is faced out has the thickness substantially the same with the thickness of each wedging element.The heat
The lateral edges of the lateral edges of insulation component and protection element described in appropriate circumstances are therefore capped and vertically protected
Protect the impact of the corrosive environment from electrolyzer.
Advantageously, the plate for facing out and the inward-facing block global formation.
According to a kind of probability, the compressible material of the thermal insulation element is made up of fibrous material, the fibrous material
All glass fiber materials in this way, carbon fiber material, rock fiber material or hemp material.It may also is that high-insulation
It is many porous types or based on perlite, kieselguhr or calcium silicates.
Advantageously, the compressible material of the thermal insulation element have less than 0.5W/m.K pyroconductivity (at room temperature
Measured using ASTM C201 methods).
Advantageously, the corrosion that the thermal insulation element by made by compressible material is caused by an opposing by electrolyte flue gas
Material layer is surrounded.High corrosion electrolysis flue gas can permeate and climing within the whole life-span against the electrolyzer of the side wall of pot shell
Prolong, so that the compressible material of the thermal insulation element is degenerated.Compressible material is enclosed in into an opposing from electrolyte
Contributing to protection in the material layer of the corrosion of flue gas (or vapour barrier) can be used to manufacture the material of the thermal insulation element
With the scope for extending the material that can be used to manufacture the thermal insulation element.
Opposing is advantageously formed from the material layer of the corrosion of electrolyte flue gas by an aluminium film.
Advantageously, the wedging element shows the compression resistance power more than 10MPa.
Advantageously, the pyroconductivity that the wedging element has is less than the pyroconductivity of the inward-facing block and appropriate
In the case of less than the plate for facing out pyroconductivity.
Therefore the wedging element is formed without the heat conducting bridge of pot shell wall of the evil between the thermal insulation element.
It is described to wedge element with the pyroconductivity less than 2W/m.K (at room temperature using ASTM according to a kind of possible
C201 measurements).
Advantageously, the wedging element is made up of refractory brick such as silicate or micarex, and they have good compression
Intensity and low-thermal conductivity.
Typically, the protection element is identical with the material or type of the wedging element.
Advantageously, the inward-facing block is made up of carbon-based material, and the material is particularly based on SiC, and it guarantees that pot shell will
It is durable, despite the electrolytic condition of high corrosion.
Other aspects of the present invention, objects and advantages will be being read to as non-limiting example and refer to the attached drawing is given
More clearly manifest during the following description of the embodiment of the present invention for going out.In order to improve readability, for all units for illustrating
Part, accompanying drawing is not necessarily drawn to scale.In the following description, in order to simple, with multiple embodiment identicals, similar or equivalent
Element there is identical reference number.
Fig. 1 illustrates the partial schematic view of the inside of the electrolyzer of an embodiment of the invention.
Fig. 2 illustrates another partial schematic view of the inside of the electrolyzer of an embodiment of the invention.
Fig. 3 illustrates another partial schematic view of the inside of the electrolyzer of an embodiment of the invention.
Fig. 4 is the fragmentary sectional view of the inside of the electrolyzer according to the embodiment of the present invention illustrated in Fig. 3.
As illustrated in Fig. 1, electrolyzer 100 includes pot shell 200 and lateral insulation lining, and the lining that laterally insulate includes handing over
Alternately seat against thermal insulation element 1 and wedging element 2 on the side wall 3 of pot shell 200.The protection of these thermal insulation elements 1
Element 4 is covered (Fig. 2), and the protection element further covers the inward-facing block 5 (Fig. 3) for bearing against the wedging element 2.Face
Outside plate 6 also extends and the wedging element 2 in thermal insulation element 1 and the top of protection element 4 against the side wall 3 of pot shell 200
Alignment.(Fig. 3).
The pressure between the side wall and inward-facing block 5 from pot shell 200 because of the arrangement of wedging element 2 of thermal insulation element 1
Epitome is rung, so they can be made up of compressible heat insulator.The compressible heat insulator can be, example
Such as, fibrous material, such as, glass fiber material, carbon fiber material, rock fiber material or hemp material.It is described can
The heat insulator of compression can also be many porous types of such as high-insulation or based on perlite, kieselguhr or calcium silicates
Material.
Thermal insulation element 1 has high coefficient of thermal insulation by made by compressible material so that this compressible material of little thickness
Material is enough to ensure that the good heat insulation of the wall of the pot shell that they are covered.
Wedging element 2 includes refractory material, such as, refractory brick silicate or micarex.The wedging element must be protected
The thermal insulation element avoids crushed and advantageously facilitates heat insulation.These wedging elements 2 and the usual table of protection element 4
The heat insulation characteristics for revealing are inferior to the heat insulation characteristics of thermal insulation element 1, even if they are good insulating bodies.Their heat biography
Conductance is less than 2W/m.K.The length of each thermal insulation element 1 measured along the longitudinal axis (x-axis, Fig. 1) of the wall 3 of pot shell 200
Degree is selected to the length more than each wedging element 2.Generally, using one to four and preferably one to five length ratio, to obtain
The optimal thermal losses obtained on the wall 3 of pot shell 200 is reduced.
Additionally, the thickness of each wedging element 2 is equal to or more than the thickness of thermal insulation element 1.Additionally, two adjacent wedges
Enter length of the plan distance between element 2 less than the longitudinal axis x of the wall 3 along pot shell 200 of an inward-facing block 5,
So that inward-facing block 5 can bear against at least two wedging elements 2.In this way, each inward-facing block 5 is against extremely
Few two wedgings element 2 is disposed.The wedging element has the incompressible intensity more than 10MPa, so that they are firm enough
It is property and incompressible, to prevent inward-facing block 5 from compressing the thermal insulation element 1 by made by compressible material, otherwise its meeting
There are the heat insulation characteristics for weakening.
Inward-facing block 5 is carbon-based material.Its effect is to aid in protecting the wall 3 and thermal insulation element 1 of pot shell 200 to avoid
At very high temperatures due to infection that liquid aluminium and/or electrobath are caused.It is intended to cover all thermal insulation elements
1st, at least a portion of element 2 and the element 6 for facing out is wedged.
As illustrated in Fig. 2, protection element 4 is inserted between thermal insulation element 1 and inward-facing block 5, is in two
In space between individual adjacent wedging element 2.Each wedging element 2 has and a protection element 4 and a heat insulation unit
The substantially the same thickness of the gross thickness of part 1.These protection elements 4 by made by refractory material can be protected as time go by
Insulate and complete the heat insulation provided by thermal insulation element 1.Protection element 4 can be by identical with the component of wedging element 2
Component make.
As illustrated in Fig. 3, the plate 6 for facing out is made up of carborundum (SiC) sill, with the thickness with wedging element 2
The substantially the same thickness of degree, covers thermal insulation element 1, the wedging element 2 between the inwall 3 and inward-facing block 5 of pot shell 200
And the upper edge of protection element 4.This arrangement contributes to protecting different elements from corrosion and with position
Place provides electrobath, the suitable heat exchange between pot shell wall and outside atmosphere to create one group of inward-facing block of protection 5
Cryolite.
According to a kind of probability not illustrated, all side walls 3 of pot shell are all by thermal insulation element 1, wedging element 2, protection
Element 4, inward-facing block 5 and the plate 6 for facing out are covered.In this way, pot shell 200 has optimal heat distribution.
Fig. 4 is the fragmentary sectional view of electrolyzer, exemplified with pot shell 200, directly abut pot shell 200 wall 3 fix and with
The thermal insulation element 1 that protection element 4 is adjacent, protected by inward-facing block 5 and the plate 6 for facing out.
In this way, the invention provides a kind of electrolyzer with lateral insulation lining is with by occupying little room
Optimal insulation is efficiently reducing thermal losses.
Self-evident, the present invention is not restricted to the embodiment that describes by way of example above, but including being retouched
All technically equivalent ones of the means stated or variant and combinations thereof.
Claims (20)
1. electrolyzer (100), it is designed to comprising an electrobath, and the electrobath includes a pot shell with side wall (3)
(200) and a lateral insulation lining for covering the side wall (3), it is characterised in that the lateral insulation lining includes：
Thermal insulation element (1) by made by compressible material,
It is with least one side, wedge by made by refractory material element (2), the thermal insulation element (1) and the wedge
Enter element (2) alternately to fix against at least one side wall (3) of the pot shell (200), and
Inward-facing block (5), the inward-facing block is arranged to protects the pot shell (200) of the electrobath, the heat exhausted
The distance between edge element (1) and wedging element (2), two adjacent wedging elements (2) are adapted so that each face
Inside block (5) bears against the side of at least two wedging elements (2).
2. electrolyzer (100) according to claim 1, the thickness that wherein each wedging element (2) has is equal to or more than
The thickness of the thermal insulation element (1).
3. the electrolyzer (100) described in claim 1 to 2, wherein the lateral insulation lining also include by
The protection element (4) being arranged in made by refractory material between thermal insulation element (1) and inward-facing block (5).
4. electrolyzer (100) according to claim 3, the space between the adjacent wedging element (2) of two of which
Protection element (4).
5. the electrolyzer (100) described in claim 3 to 4, wherein each wedging element (2) with one
The substantially the same thickness of the combination thickness of thermal insulation element (1) and a protection element (4), so that the thermal insulation element
(1) compression is avoided.
6. the electrolyzer (100) described in claim 3 to 5, wherein the heat that the thermal insulation element (1) has
Insulating coefficient is more than the coefficient of thermal insulation of wedging element (2) and the coefficient of thermal insulation of the protection element (4).
7. the electrolyzer (100) described in claim 1 to 6, wherein along the corresponding wall of pot shell (200)
(3) length of the length of each thermal insulation element (1) of longitudinal axis measurement more than each wedging element (2).
8. the electrolyzer (100) described in claim 1 to 7, wherein along the corresponding wall of pot shell (200)
(3) length of each thermal insulation element (1) of longitudinal axis measurement is more at least four times larger than the length of each wedging element (2).
9. the electrolyzer (100) described in claim 1 to 8, wherein the lateral insulation lining also includes face
Outside plate (6), the plate for facing out extends and is arranged to against at least one side wall (3) of the pot shell (200)
In wedging element (2) and the alignment of the thermal insulation element (1) top.
10. electrolyzer (100) according to claim 9, wherein the plate (6) for facing out is made up of carborundum.
Electrolyzer (100) described in 11. one in claim 9 or 10, the plate (6) that wherein each is faced out with
The substantially the same thickness of thickness of each wedging element (2).
Electrolyzer (100) described in 12. one in claim 9 to 11, wherein the plate (6) for facing out with it is described
Inward-facing block (5) global formation.
Electrolyzer (100) described in 13. one in claim 1 to 11, wherein the thermal insulation element (1) presses
Compression material is made up of fibrous material, many porous types of all high-insulations in this way of the fibrous material or based on perlite, diatom
Soil or the glass fiber material of calcium silicates, carbon fiber material, rock fiber material or hemp material.
Electrolyzer (100) described in 14. one in claim 1 to 12, wherein wedging element (2) shows and is more than
The compression resistance power of 10MPa.
Electrolyzer (100) described in 15. one in claim 1 to 13, wherein the heat that wedging element (2) has
Conductivity is less than the pyroconductivity of inward-facing block (5) and in appropriate circumstances less than the conduction of heat of the plate (6) for facing out
Rate.
Electrolyzer (100) described in 16. one in claim 1 to 15, wherein wedging element (2) shows and is less than
The pyroconductivity of 2W/m.K.
Electrolyzer (100) described in 17. one in claim 1 to 16, wherein wedging element (2) is by silicate
Refractory brick or micarex are constituted.
Electrolyzer (100) described in 18. one in claim 1 to 17, wherein the thermal insulation element (1) presses
Compression material has the pyroconductivity less than 0.5W/m.K.
Electrolyzer (100) described in 19. one in claim 1 to 18, wherein the heat insulator (1) presses
Compression material is surrounded by the material layer that is resisted the corrosion caused by electrolyte flue gas.
Electrolyzer (100) described in 20. one in claim 1 to 19, wherein the inward-facing block (5) is carbon-based
's.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1401518 | 2014-07-04 | ||
| FR1401518A FR3023301B1 (en) | 2014-07-04 | 2014-07-04 | ELECTROLYSIS TANK |
| PCT/IB2015/001116 WO2016001743A1 (en) | 2014-07-04 | 2015-07-01 | Side insulation coating for an electrolytic cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106661747A true CN106661747A (en) | 2017-05-10 |
| CN106661747B CN106661747B (en) | 2018-08-07 |
Family
ID=51483483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580034926.5A Active CN106661747B (en) | 2014-07-04 | 2015-07-01 | Lateral insulation lining for electrolytic cell |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP3164529B1 (en) |
| CN (1) | CN106661747B (en) |
| AU (1) | AU2015282394B2 (en) |
| CA (1) | CA2950692C (en) |
| FR (1) | FR3023301B1 (en) |
| RU (1) | RU2689292C2 (en) |
| WO (1) | WO2016001743A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3129157A1 (en) * | 2021-11-18 | 2023-05-19 | Rio Tinto Alcan International Limited | INTERNAL LINER SYSTEM FOR ELECTROLYSIS TANK |
| WO2023233196A1 (en) * | 2022-06-03 | 2023-12-07 | Vedanta Limited (Aluminium & Power) | Lining design of electrolytic cell in an aluminum smelter |
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| EP0399786A2 (en) * | 1989-05-25 | 1990-11-28 | Alcan International Limited | Refractory linings capable of resisting sodium and sodium salts |
| CN1185815A (en) * | 1995-05-26 | 1998-06-24 | 圣戈本工业陶瓷股份有限公司 | Improved lining for aluminum production furnace |
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| RU2186880C1 (en) * | 2001-03-05 | 2002-08-10 | Общество с ограниченной ответственностью "АЛКОРУС ИНЖИНИРИНГ" | Side lining of aluminum electrolyzer |
| RU2294404C1 (en) * | 2005-09-20 | 2007-02-27 | Открытое акционерное общество "Сибирский научно-исследовательский, конструкторский и проектный институт алюминиевой и электродной промышленности" (ОАО "СибВАМИ") | Cathode device of aluminum cell |
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| CN203307449U (en) * | 2013-06-29 | 2013-11-27 | 贵阳铝镁设计研究院有限公司 | Lining structure of side part of refined aluminum groove |
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2014
- 2014-07-04 FR FR1401518A patent/FR3023301B1/en not_active Expired - Fee Related
-
2015
- 2015-07-01 CN CN201580034926.5A patent/CN106661747B/en active Active
- 2015-07-01 WO PCT/IB2015/001116 patent/WO2016001743A1/en active Application Filing
- 2015-07-01 AU AU2015282394A patent/AU2015282394B2/en active Active
- 2015-07-01 RU RU2017103537A patent/RU2689292C2/en active
- 2015-07-01 EP EP15814096.2A patent/EP3164529B1/en active Active
- 2015-07-01 CA CA2950692A patent/CA2950692C/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0399786A2 (en) * | 1989-05-25 | 1990-11-28 | Alcan International Limited | Refractory linings capable of resisting sodium and sodium salts |
| CN1185815A (en) * | 1995-05-26 | 1998-06-24 | 圣戈本工业陶瓷股份有限公司 | Improved lining for aluminum production furnace |
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Also Published As
| Publication number | Publication date |
|---|---|
| CA2950692A1 (en) | 2016-01-07 |
| AU2015282394A1 (en) | 2017-01-12 |
| FR3023301B1 (en) | 2016-07-01 |
| EP3164529A1 (en) | 2017-05-10 |
| EP3164529B1 (en) | 2019-04-24 |
| RU2689292C2 (en) | 2019-05-24 |
| WO2016001743A1 (en) | 2016-01-07 |
| CA2950692C (en) | 2022-07-26 |
| FR3023301A1 (en) | 2016-01-08 |
| RU2017103537A (en) | 2018-08-06 |
| RU2017103537A3 (en) | 2019-01-28 |
| AU2015282394B2 (en) | 2019-03-07 |
| CN106661747B (en) | 2018-08-07 |
| EP3164529A4 (en) | 2018-01-24 |
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