CA2709206C - Assembly for measurement of a metal level in a reduction cell - Google Patents
Assembly for measurement of a metal level in a reduction cell Download PDFInfo
- Publication number
- CA2709206C CA2709206C CA2709206A CA2709206A CA2709206C CA 2709206 C CA2709206 C CA 2709206C CA 2709206 A CA2709206 A CA 2709206A CA 2709206 A CA2709206 A CA 2709206A CA 2709206 C CA2709206 C CA 2709206C
- Authority
- CA
- Canada
- Prior art keywords
- chisel
- pot
- cathodic
- electronic unit
- current
- 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.)
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Links
- 238000005259 measurement Methods 0.000 title description 5
- 229910052751 metal Inorganic materials 0.000 title description 2
- 239000002184 metal Substances 0.000 title description 2
- 239000004411 aluminium Substances 0.000 claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000000605 extraction Methods 0.000 claims abstract description 4
- 239000011810 insulating material Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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
- C25C3/14—Devices for feeding or crust breaking
-
- 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
- C25C3/20—Automatic control or regulation of cells
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Level Indicators Using A Float (AREA)
- Coating With Molten Metal (AREA)
Abstract
Device for production of aluminium including a cathodic pot, anode means, an electric source for creating an DC-current between the cathodic pot and the anode means for extraction of molten aluminium out of a bath, and an assembly for breaking open a crust, which is formed during the production in the area of the anode means, with a chisel driven by a pneumatic cylinder having a sensor for detecting the stroke of a piston rod of the cylinder and is electrical connected to one terminal of an electronic unit, while another terminal of the electronic unit is connected to the cathodic pot for creating an AC-current between chisel and the cathodic part and measuring the potential and/or AC-current between both, wherein the chisel comprises means for forming an electrode in the bottom part and electrical connection means for connecting the electrode to the one terminal of the electronic unit.
Description
ROBERT BOSCH GM13H DOsseldorf, 08. June 2010 /11=0014=MOMMIIMMIPIWIMM.....===========.1.16.......============ __ ROBERT BOSCH GMBH
Wemetstrasse 1,70442 Stuttgart Assembly for measurement of a metal level in a reduction cell Field of the invention The invention is related to a device for production of aluminium including a cathodic pot, anode means, an electric source for creating an DC-current between the cathodic pot and the anode means for extraction of molten alnminium out of a bath, and an assembly for breaking open a crust, which is formed during the production in the area of the anode means, with a chisel driven by a pneumatic cylinder having a sensor for detecting the stroke of a piston rod of the cylinder and is electrical connected to one terminal of an electronic unit, while another terminal of the electronic unit is connected to the cathodic pot for creating an AC-current between chisel and the cathodic pot and measuring the potential and/or the AC-current between both.
jElackar4 of the invention The very important resource aluminium is nowadays gained by methods like a Hall/Heroult cell. During this method aluminium is extracted out of a bath by creating an electric current between a cathodic pot, which contains the bath, and an anode. Thus a layer of molten aluminium is created on the bottom of the cathodic pot and is extracted by suction, while the oxygen formed during the electrolysis reacts with carbon of the anode to carbon dioxide.
LK:LC, hv
Wemetstrasse 1,70442 Stuttgart Assembly for measurement of a metal level in a reduction cell Field of the invention The invention is related to a device for production of aluminium including a cathodic pot, anode means, an electric source for creating an DC-current between the cathodic pot and the anode means for extraction of molten alnminium out of a bath, and an assembly for breaking open a crust, which is formed during the production in the area of the anode means, with a chisel driven by a pneumatic cylinder having a sensor for detecting the stroke of a piston rod of the cylinder and is electrical connected to one terminal of an electronic unit, while another terminal of the electronic unit is connected to the cathodic pot for creating an AC-current between chisel and the cathodic pot and measuring the potential and/or the AC-current between both.
jElackar4 of the invention The very important resource aluminium is nowadays gained by methods like a Hall/Heroult cell. During this method aluminium is extracted out of a bath by creating an electric current between a cathodic pot, which contains the bath, and an anode. Thus a layer of molten aluminium is created on the bottom of the cathodic pot and is extracted by suction, while the oxygen formed during the electrolysis reacts with carbon of the anode to carbon dioxide.
LK:LC, hv
- 2 -Furthermore a crust, which covers the bath, is formed in the area of the anode. This crust has to be broken up to supply further aluminium oxide to the cathodic pot during the production of aluminium.
WO 01/06039 discloses such a device for production of aluminium by a Hall/Heroult cell, which includes a cathodic pot, anode means and an electric source for creating an electric current between the pot and the anode. Furthermore an assembly is arranged containing a pneumatic cylinder with a chisel, which is electronically connected by an electronic unit with the pot, for breaking open a crust, which is formed during the process of production of aluminium in the area of the anode, The pneumatic cylinder and thus the movement of the chisel are controlled by the electronic connection of the chisel with the pot so that a thermal stress of the chisel during breaking open the crust and dipping into the melt is minimized.
US 4,857,157 discloses a method for controlling the addition of the aluminium oxide to the Hall/Heroult cell by measuring the level of bath and melt in the pot Therefore the rise of a chisel of an assembly for braking open the crust is detected by an electric contact and a resistor. When the chisel then gets in contact with the bath the potential of the resistor rises suddenly and the current rise of the chisel is noted. With a estimated height of the layer of molten aluminium it is thus possible to calculate the height of bath.
The disadvantage of the known state of art is, that the level of the layer of molten aluminium can only be estimated, not measured. Because of leakage currents from the bath the electrical potential in top of the chisel is higher than at the bottom. Since the electrical potential is measured in top of the chisel, this causes measurement inaccuracy. Another problem is that the voltage from the electrical source is fluctuating,
WO 01/06039 discloses such a device for production of aluminium by a Hall/Heroult cell, which includes a cathodic pot, anode means and an electric source for creating an electric current between the pot and the anode. Furthermore an assembly is arranged containing a pneumatic cylinder with a chisel, which is electronically connected by an electronic unit with the pot, for breaking open a crust, which is formed during the process of production of aluminium in the area of the anode, The pneumatic cylinder and thus the movement of the chisel are controlled by the electronic connection of the chisel with the pot so that a thermal stress of the chisel during breaking open the crust and dipping into the melt is minimized.
US 4,857,157 discloses a method for controlling the addition of the aluminium oxide to the Hall/Heroult cell by measuring the level of bath and melt in the pot Therefore the rise of a chisel of an assembly for braking open the crust is detected by an electric contact and a resistor. When the chisel then gets in contact with the bath the potential of the resistor rises suddenly and the current rise of the chisel is noted. With a estimated height of the layer of molten aluminium it is thus possible to calculate the height of bath.
The disadvantage of the known state of art is, that the level of the layer of molten aluminium can only be estimated, not measured. Because of leakage currents from the bath the electrical potential in top of the chisel is higher than at the bottom. Since the electrical potential is measured in top of the chisel, this causes measurement inaccuracy. Another problem is that the voltage from the electrical source is fluctuating,
- 3 -Summary of the Invention It is therefore a task of the invention to provide a device for measuring the level of the layer of molten aluminium with a high accuracy.
This object is achieved by the chisel comprising means for creating an electrode in the bottom part and electrical connection means for connecting the electrode to one terminal of an electronic unit. Thus it is possible to measure the level of the layer of molten aluminium in the pot since the point of measuring is moved to the bottom part of the chisel and leakage currents don't have an effect on the measurement.
According to one aspect of the invention there is provided a device for production of aluminium including:
a cathodic pot;
anode means;
an electric source for creating a DC-current between the cathodic pot and the anode means for extraction of molten aluminium out of a bath; and an assembly for breaking open a crust, which is formed during the production in the area of the anode means, with a chisel driven by a pneumatic cylinder having a sensor for detecting the stroke of a piston rod of the cylinder and is electrically connected to one terminal of an electronic unit, while another terminal of the electronic unit is connected to the cathodic pot for creating an AC-current between the chisel and the cathodic pot and measuring the potential and/or the AC-current between both, wherein the sidewalls of the chisel are electrically insulated and the chisel comprises an electrode in its bottom part and electrical connection means for connecting the electrode in the bottom part to the one terminal of the electronic unit.
According to a preferred embodiment of the invention the electrical connection means are arranged inside a hollow along the middle axis of the chisel and the top cover of the chisel is electrically insulated thereto. Thus the chisel can be made of conventional material while a accurate measurement is guaranteed.
According to a further embodiment of the invention the electrical connection means are formed by an electrical cable. This implicates the advantage, that a low-cost connection to the one terminal of the electronic unit can be achieved.
- 3a -According to a further preferred embodiment of the invention the electrical connection means are formed by a chisel rod, which is arranged in the hollow of the chisel and serves as a mechanical fasten element for the chisel tube and the cover of the chisel.
Thereby it is possible to achieve a tough version of the chisel.
-
This object is achieved by the chisel comprising means for creating an electrode in the bottom part and electrical connection means for connecting the electrode to one terminal of an electronic unit. Thus it is possible to measure the level of the layer of molten aluminium in the pot since the point of measuring is moved to the bottom part of the chisel and leakage currents don't have an effect on the measurement.
According to one aspect of the invention there is provided a device for production of aluminium including:
a cathodic pot;
anode means;
an electric source for creating a DC-current between the cathodic pot and the anode means for extraction of molten aluminium out of a bath; and an assembly for breaking open a crust, which is formed during the production in the area of the anode means, with a chisel driven by a pneumatic cylinder having a sensor for detecting the stroke of a piston rod of the cylinder and is electrically connected to one terminal of an electronic unit, while another terminal of the electronic unit is connected to the cathodic pot for creating an AC-current between the chisel and the cathodic pot and measuring the potential and/or the AC-current between both, wherein the sidewalls of the chisel are electrically insulated and the chisel comprises an electrode in its bottom part and electrical connection means for connecting the electrode in the bottom part to the one terminal of the electronic unit.
According to a preferred embodiment of the invention the electrical connection means are arranged inside a hollow along the middle axis of the chisel and the top cover of the chisel is electrically insulated thereto. Thus the chisel can be made of conventional material while a accurate measurement is guaranteed.
According to a further embodiment of the invention the electrical connection means are formed by an electrical cable. This implicates the advantage, that a low-cost connection to the one terminal of the electronic unit can be achieved.
- 3a -According to a further preferred embodiment of the invention the electrical connection means are formed by a chisel rod, which is arranged in the hollow of the chisel and serves as a mechanical fasten element for the chisel tube and the cover of the chisel.
Thereby it is possible to achieve a tough version of the chisel.
-
- 4 -According to a further embodiment the chisel consists of an electonic insulating material.
The advantage is, that such a chisel is only conductive on the desired surfaces.
According to another embodiment of the invention the sidewalls of the chisel are electronically insulated. This implicates the advantage, that leakage currents can be avoided with a small effort because a conventional chisel can be used in combination with an insulating coating.
According to another embodiment the chisel is connected to the piston rod via a mechanical connection, which is of an electrically leading material. By using this method a connection of the chisel to the electronic unit can be realized with a small effort since it can be done via the pneumatic cylinder.
According to a further embodiment the insulation material is of an ceramic material.
Therefore a reliable insulation is realized.
According to another preferred embodiment the sensor is a resistive sensor.
The advantage is, that the stroke of the piston rod of the pneumatic cylinder and thereby the stoke of the chisel can be noted accurately and with a low effort Brief description of the drawings The invention will now be described in more detail at the background of embodiments and with reference to the drawings, wherein:
The advantage is, that such a chisel is only conductive on the desired surfaces.
According to another embodiment of the invention the sidewalls of the chisel are electronically insulated. This implicates the advantage, that leakage currents can be avoided with a small effort because a conventional chisel can be used in combination with an insulating coating.
According to another embodiment the chisel is connected to the piston rod via a mechanical connection, which is of an electrically leading material. By using this method a connection of the chisel to the electronic unit can be realized with a small effort since it can be done via the pneumatic cylinder.
According to a further embodiment the insulation material is of an ceramic material.
Therefore a reliable insulation is realized.
According to another preferred embodiment the sensor is a resistive sensor.
The advantage is, that the stroke of the piston rod of the pneumatic cylinder and thereby the stoke of the chisel can be noted accurately and with a low effort Brief description of the drawings The invention will now be described in more detail at the background of embodiments and with reference to the drawings, wherein:
-5 -Fig. 1 diagrammatically shows the device for production of aluminium according to a first embodiment of the invention, Fig. 2 diagrammatically shows the device for production of aluminium according to a second embodiment of the invention, and =
Fig. 3 diagrammatically shows the device for production of aluminium according to a third embodiment of the invention.
Detailed description of the drawings In Fig. I the device for production of aluminium according to the invention is shown, which comprises a cathodic pot I and anode means 2, being connected by a ¨ not shown ¨ electric source. This electric source creates a electric current between the cathodic pot 1 and the anode means 2 to cause the effect of a Hallffieroult cell in an bath 4, in which aluminium exists in a compound. Thereby a layer of pure aluminium 3 accumulates in the bottom area of the cathodic pot 1, while a layer of crust 5 covers the bath 4 close to the anode means 2. For breaking open this crust 5 an assembly 6 is arranged near the cathodic pot 1.
This assembly 6 comprises a pneumatic cylinder 7 with a piston rod 8, which is mechanically connected to a chisel 9 via a mechanical coupling part 10 of an electrical leading material.
The chisel 9 is furthermore via the mechanical coupling part 10 and the piston rod 8 electronically connected to a electronic unit 1 1, while another terminal of the electronic unitl lis wired with the cathodic pot 1. In the upper part of the pneumatic cylinder 7 moreover a linear sensor 12 is placed, for detecting the stroke of the piston rod 8 and chisel 9. To avoid leakage currents through the sidewalls of the chisel 9 a coating of an insulating material 13 is provided.
Fig. 3 diagrammatically shows the device for production of aluminium according to a third embodiment of the invention.
Detailed description of the drawings In Fig. I the device for production of aluminium according to the invention is shown, which comprises a cathodic pot I and anode means 2, being connected by a ¨ not shown ¨ electric source. This electric source creates a electric current between the cathodic pot 1 and the anode means 2 to cause the effect of a Hallffieroult cell in an bath 4, in which aluminium exists in a compound. Thereby a layer of pure aluminium 3 accumulates in the bottom area of the cathodic pot 1, while a layer of crust 5 covers the bath 4 close to the anode means 2. For breaking open this crust 5 an assembly 6 is arranged near the cathodic pot 1.
This assembly 6 comprises a pneumatic cylinder 7 with a piston rod 8, which is mechanically connected to a chisel 9 via a mechanical coupling part 10 of an electrical leading material.
The chisel 9 is furthermore via the mechanical coupling part 10 and the piston rod 8 electronically connected to a electronic unit 1 1, while another terminal of the electronic unitl lis wired with the cathodic pot 1. In the upper part of the pneumatic cylinder 7 moreover a linear sensor 12 is placed, for detecting the stroke of the piston rod 8 and chisel 9. To avoid leakage currents through the sidewalls of the chisel 9 a coating of an insulating material 13 is provided.
- 6 -During the production of pure aluminium 3 out of a bath 4 by a Hall/Heroult cell the emerging crust 5 is broken open by the chisel 9. The stroke of the chisel 9 moved by the pneumatic cylinder 7 is controlled by the electronic unit 11. Therefore a relative low voltage is impressed at the chisel 9 and depending on the electric current measured at the terminal of the electronic unit 11 connected to the cathodic pot 1 the chisel 9 is moved downward and as the case may be ptdled bacic. In the area of the crust 5 the conductivity is very low, while in the layer of the bath 4 it is higher, getting it's maximum in the layer of pure aluminium 3, where the chisel 9 has to be pulled back fast because of the very high temperature. Since the linear sensor notes the stroke of the piston rod 8 and the chisel 9, in combination with the measured electronic currents by the electronic unit II the levels of the different layers can be measured.
By contrast in Fig. 2 only the inner and bottom part of the chisel 9 are electronically connected to the electronic milt 11 via a chisel rod 15 in a hollow 16 of the chisel 9, while between the side walls of the chisel 9 and the chisel rod 15 is an air gap.
The leakage currents between the side walls and the bottom part of the chisel 9 are indicated by a resistance.
Furthermore the top cover 14 between the chisel 9 and the connection means is of an insulating material.
In Fig. 3 the chisel 9 is fully made of insulating material 13, while the electronic connection to the electronic unit 11 is realized by a cable 17, which runs in the inner part of chisel 9.
Again the top cover 14 of the chisel 91$ of an insulating material.
By contrast in Fig. 2 only the inner and bottom part of the chisel 9 are electronically connected to the electronic milt 11 via a chisel rod 15 in a hollow 16 of the chisel 9, while between the side walls of the chisel 9 and the chisel rod 15 is an air gap.
The leakage currents between the side walls and the bottom part of the chisel 9 are indicated by a resistance.
Furthermore the top cover 14 between the chisel 9 and the connection means is of an insulating material.
In Fig. 3 the chisel 9 is fully made of insulating material 13, while the electronic connection to the electronic unit 11 is realized by a cable 17, which runs in the inner part of chisel 9.
Again the top cover 14 of the chisel 91$ of an insulating material.
- 7 -Reference signs:
1 cathodic pot 2 anode means 3 aluminium layer 4 bath layer crust layer 6 assembly 7 pneumatic cylinder
1 cathodic pot 2 anode means 3 aluminium layer 4 bath layer crust layer 6 assembly 7 pneumatic cylinder
8 piston rod
9 chisel mechanical coupling part 11 electronic unit 12 linear sensor 13 insulation material 14 top cover chisel of insulating material chisel rod 16 hollow 17 cable
Claims (8)
1. A device for production of aluminium including:
a cathodic pot;
anode means;
an electric source for creating a DC-current between the cathodic pot and the anode means for extraction of molten aluminium out of a bath; and an assembly for breaking open a crust, which is formed during the production in the area of the anode means, with a chisel driven by a pneumatic cylinder having a sensor for detecting the stroke of a piston rod of the cylinder and is electrically connected to one terminal of an electronic unit, while another terminal of the electronic unit is connected to the cathodic pot for creating an AC-current between the chisel and the cathodic pot and measuring the potential and/or the AC-current between both, wherein the sidewalls of the chisel are electrically insulated and the chisel comprises an electrode in its bottom part and electrical connection means for connecting the electrode in the bottom part to the one terminal of the electronic unit.
a cathodic pot;
anode means;
an electric source for creating a DC-current between the cathodic pot and the anode means for extraction of molten aluminium out of a bath; and an assembly for breaking open a crust, which is formed during the production in the area of the anode means, with a chisel driven by a pneumatic cylinder having a sensor for detecting the stroke of a piston rod of the cylinder and is electrically connected to one terminal of an electronic unit, while another terminal of the electronic unit is connected to the cathodic pot for creating an AC-current between the chisel and the cathodic pot and measuring the potential and/or the AC-current between both, wherein the sidewalls of the chisel are electrically insulated and the chisel comprises an electrode in its bottom part and electrical connection means for connecting the electrode in the bottom part to the one terminal of the electronic unit.
2. A device according to claim 1, wherein the electrical connection means are arranged inside a hollow along the middle axis of the chisel, and wherein a top cover of the chisel is electrically insulated thereto.
3. A device according to claim 2, wherein the electrical connection means are formed by an electrical cable.
4. A device according to claim 2, wherein the electrical connection means are formed by a chisel rod, which is arranged in the hollow of the chisel and serves as a mechanical fasten element for the chisel tube and the top cover of the chisel.
5. A device according to any one of claims 2 to 4, wherein the chisel consists of electronic insulating material.
6. A device according to any one of claims 1 to 5, wherein the chisel is connected to the piston rod via a mechanical coupling part, which consists of an electrically leading material.
7. A device according to any one of claims 1 to 6, wherein the insulation material is of a ceramic material.
8. A device according to any one of claims 1 to 7, wherein the sensor is a resistive sensor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP102007059962.7 | 2007-12-11 | ||
| DE102007059962A DE102007059962B3 (en) | 2007-12-11 | 2007-12-11 | Electrolytic aluminum production plant, includes cutting tool for breaking up crust around anode having base region forming electrode for accurate measurement of molten aluminum layer thickness |
| PCT/EP2008/010533 WO2009074319A1 (en) | 2007-12-11 | 2008-12-11 | Device for measuring the metal level in a reduction basin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2709206A1 CA2709206A1 (en) | 2009-06-18 |
| CA2709206C true CA2709206C (en) | 2016-03-15 |
Family
ID=39942392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2709206A Active CA2709206C (en) | 2007-12-11 | 2008-12-11 | Assembly for measurement of a metal level in a reduction cell |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20110073466A1 (en) |
| CA (1) | CA2709206C (en) |
| DE (1) | DE102007059962B3 (en) |
| NO (1) | NO345594B1 (en) |
| SE (1) | SE535088C2 (en) |
| WO (1) | WO2009074319A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350024B (en) * | 2015-11-23 | 2018-11-16 | 中国铝业股份有限公司 | A kind of aluminium electrolysis anode thickness in slot measuring device |
| RU2692710C1 (en) * | 2017-06-15 | 2019-06-26 | Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" | Method and device for destruction of electrolyte crust by plasma separation cutting |
| FR3077018B1 (en) * | 2018-01-24 | 2020-01-24 | Rio Tinto Alcan International Limited | DRILLING DEVICE COMPRISING A TUBULAR SLEEVE FIXED TO A CYLINDER |
| CN112123307B (en) * | 2020-09-16 | 2022-06-21 | 江西铜业（清远）有限公司 | Novel storage rack |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3305236C2 (en) * | 1983-02-10 | 1985-11-21 | Schweizerische Aluminium Ag, Chippis | Device for controlling an impact device of a melt flow electrolysis cell and method for operating the device |
| FR2614320B1 (en) * | 1987-04-21 | 1989-06-30 | Pechiney Aluminium | METHOD AND DEVICE FOR CONTROLLING THE ADDITIONS OF SOLID ELECTROLYSIS IN ELECTROLYSIS TANKS FOR THE PRODUCTION OF ALUMINUM. |
| DE29708312U1 (en) * | 1997-05-09 | 1997-07-17 | Festo Kg, 73734 Esslingen | Crust breaker cylinder |
| US6503701B1 (en) * | 1999-06-15 | 2003-01-07 | Biosensor Systems Design, Inc. | Analytic sensor apparatus and method |
| US6436270B1 (en) * | 1999-07-19 | 2002-08-20 | Ab Rexroth Mecman | Method and device for controlling the movement of a feeding and breaking chisel in an aluminum production cell |
| DE102004033964B3 (en) * | 2004-07-14 | 2006-03-30 | Bosch Rexroth Ag | Device for operating a crust-breaking arrangement for metal melts comprises a valve arrangement having a valve for withdrawing a piston rod and for forming a connection to an injection pressure source |
-
2007
- 2007-12-11 DE DE102007059962A patent/DE102007059962B3/en active Active
-
2008
- 2008-12-11 WO PCT/EP2008/010533 patent/WO2009074319A1/en active Application Filing
- 2008-12-11 CA CA2709206A patent/CA2709206C/en active Active
- 2008-12-11 US US12/747,611 patent/US20110073466A1/en not_active Abandoned
- 2008-12-11 NO NO20100954A patent/NO345594B1/en unknown
- 2008-12-11 SE SE1050732A patent/SE535088C2/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007059962B3 (en) | 2008-12-11 |
| NO20100954L (en) | 2010-08-30 |
| NO345594B1 (en) | 2021-05-03 |
| SE1050732A1 (en) | 2010-07-02 |
| WO2009074319A1 (en) | 2009-06-18 |
| CA2709206A1 (en) | 2009-06-18 |
| US20110073466A1 (en) | 2011-03-31 |
| SE535088C2 (en) | 2012-04-10 |
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