IE40797B1 - Production of aluminium by electrolysis with control of thickness of lateral ledges in a cell - Google Patents
Production of aluminium by electrolysis with control of thickness of lateral ledges in a cellInfo
- Publication number
- IE40797B1 IE40797B1 IE132/75A IE13275A IE40797B1 IE 40797 B1 IE40797 B1 IE 40797B1 IE 132/75 A IE132/75 A IE 132/75A IE 13275 A IE13275 A IE 13275A IE 40797 B1 IE40797 B1 IE 40797B1
- Authority
- IE
- Ireland
- Prior art keywords
- cell
- resistance
- aluminium
- level
- thickness
- Prior art date
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
- C25C3/20—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)
- Battery Electrode And Active Subsutance (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Primary Cells (AREA)
Abstract
1462332 Fused electrolyte production of aluminium SWISS ALUMINIUM Ltd 28 Jan 1975 [30 Jan 1974] 3598/75 Heading C7B In producing Al by electrolysis of Al 2 O 3 dissolved in a fluoride melt e.g. cryolite in a cell, the thickness of the lateral ledges (24), Fig. (not shown), of frozen electrolyte in the cell are controlled by (a) calculating at regular intervals e.g. between 2 secs and 5 mins, while the cell has no anode effects and no working operations influencing the cell resistance are being carried out, the instantaneous (ohmic) cell resistance, smoothing these values over a period e.g. between 1 min and 1 hour, and calculating the difference #R between this smoothed cell resistance and the base resistance established for the cell; (b) raising or lowering the anode beam (21) whenever #R exceeds a limiting value e.g. 0À5 microhms given for each cell to match the existing resistance with the base resistance; (c) reading the level of the anode beam by a level indicator e.g. potentiometer and storing; (d) at successive intervals not exceeding one day repeating steps (a) and (b) and reading the level of the anode beam as in (c); (e) calculating a difference #B from each two levels of the anode beam determined, corrected for changes of level due to tapping or metal addition; and (f) after each step (e) carrying out one or more known procedures, if necessary, which tend to bring back the thickness of the lateral ledges (24) to the preferred value such that areas of electrode surfaces are equal, depending on the sign and magnitude of the corrected #B value: e.g. changing the interpolar distance (d) or current, to charge the electric power of the cell, height of metal on cell bottom or of Al 2 O 3 layer (23) on the crust of frozen electrolyte above the melt or on the anodes, to charge the heat losses of the cell, the number of crust breakings per day, and/or the composition of the melt e.g. the concentration of electrolyte additives AlF 3 , LiF, CaF 2 , MgF 2 , NaCl. The calculations, and storing, may be effected by computer. The cell insulation (13) may be of chamotte. The carbon anodes (18) may be selfbaking, renewed by pouring green electrode paste into a steel jacket, or pre-baked; iron cathode bars (17) may be used.
[GB1462332A]
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH124374A CH592749A5 (en) | 1974-01-30 | 1974-01-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
IE40797L IE40797L (en) | 1975-07-30 |
IE40797B1 true IE40797B1 (en) | 1979-08-15 |
Family
ID=4205817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE132/75A IE40797B1 (en) | 1974-01-30 | 1975-01-23 | Production of aluminium by electrolysis with control of thickness of lateral ledges in a cell |
Country Status (19)
Country | Link |
---|---|
US (1) | US3900371A (en) |
JP (1) | JPS547491B2 (en) |
AT (1) | AT345004B (en) |
BE (1) | BE824655A (en) |
BR (1) | BR7500573A (en) |
CA (1) | CA1013292A (en) |
CH (1) | CH592749A5 (en) |
EG (1) | EG11547A (en) |
FR (1) | FR2259163B1 (en) |
GB (1) | GB1462332A (en) |
IE (1) | IE40797B1 (en) |
IS (1) | IS1043B6 (en) |
IT (1) | IT1031305B (en) |
NL (1) | NL7501038A (en) |
NO (1) | NO143633C (en) |
PH (1) | PH11296A (en) |
SE (1) | SE410326B (en) |
TR (1) | TR18265A (en) |
ZA (1) | ZA75244B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4333803A (en) * | 1980-10-03 | 1982-06-08 | Aluminum Company Of America | Method and apparatus for controlling the heat balance in aluminum reduction cells |
US4685514A (en) * | 1985-12-23 | 1987-08-11 | Aluminum Company Of America | Planar heat exchange insert and method |
US4702312A (en) * | 1986-06-19 | 1987-10-27 | Aluminum Company Of America | Thin rod packing for heat exchangers |
US4705106A (en) * | 1986-06-27 | 1987-11-10 | Aluminum Company Of America | Wire brush heat exchange insert and method |
US4678548A (en) * | 1986-07-21 | 1987-07-07 | Aluminum Company Of America | Corrosion-resistant support apparatus and method of use for inert electrodes |
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. |
US5114545A (en) * | 1991-06-17 | 1992-05-19 | Reynolds Metals Company | Electrolyte chemistry for improved performance in modern industrial alumina reduction cells |
FR2821364B1 (en) * | 2001-02-28 | 2004-04-09 | Pechiney Aluminium | METHOD FOR REGULATING AN ELECTROLYSIS CELL |
CN106676581B (en) * | 2016-12-27 | 2018-07-20 | 甘肃东兴铝业有限公司 | A kind of electrolytic bath of aluminium side thickness optimization control method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1961893A (en) * | 1933-07-26 | 1934-06-05 | Hartford Empire Co | Automatic level control system |
US3812024A (en) * | 1972-03-20 | 1974-05-21 | Kaiser Aluminium Chem Corp | Control of an aluminum reduction cell |
-
1974
- 1974-01-30 CH CH124374A patent/CH592749A5/xx not_active IP Right Cessation
- 1974-02-15 US US443099A patent/US3900371A/en not_active Expired - Lifetime
- 1974-03-05 CA CA194,065A patent/CA1013292A/en not_active Expired
-
1975
- 1975-01-14 ZA ZA00750244A patent/ZA75244B/en unknown
- 1975-01-17 TR TR18265A patent/TR18265A/en unknown
- 1975-01-20 IS IS2257A patent/IS1043B6/en unknown
- 1975-01-22 BE BE152607A patent/BE824655A/en unknown
- 1975-01-23 IE IE132/75A patent/IE40797B1/en unknown
- 1975-01-28 GB GB359875A patent/GB1462332A/en not_active Expired
- 1975-01-28 NO NO750253A patent/NO143633C/en unknown
- 1975-01-29 AT AT66775A patent/AT345004B/en not_active IP Right Cessation
- 1975-01-29 BR BR573/75A patent/BR7500573A/en unknown
- 1975-01-29 NL NL7501038A patent/NL7501038A/en not_active Application Discontinuation
- 1975-01-29 SE SE7500956A patent/SE410326B/en unknown
- 1975-01-29 EG EG38/75A patent/EG11547A/en active
- 1975-01-30 IT IT19771/75A patent/IT1031305B/en active
- 1975-01-30 PH PH16754A patent/PH11296A/en unknown
- 1975-01-30 JP JP1293175A patent/JPS547491B2/ja not_active Expired
- 1975-01-30 FR FR7502959A patent/FR2259163B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2503635A1 (en) | 1975-07-31 |
IS2257A7 (en) | 1975-07-31 |
NO143633C (en) | 1981-03-18 |
BE824655A (en) | 1975-05-15 |
NO750253L (en) | 1975-08-25 |
NO143633B (en) | 1980-12-08 |
AT345004B (en) | 1978-08-25 |
FR2259163A1 (en) | 1975-08-22 |
IE40797L (en) | 1975-07-30 |
ZA75244B (en) | 1976-01-28 |
ATA66775A (en) | 1977-12-15 |
FR2259163B1 (en) | 1978-04-21 |
PH11296A (en) | 1977-11-02 |
CH592749A5 (en) | 1977-11-15 |
JPS547491B2 (en) | 1979-04-07 |
GB1462332A (en) | 1977-01-26 |
JPS50114320A (en) | 1975-09-08 |
AU7772575A (en) | 1976-08-05 |
DE2503635B2 (en) | 1976-12-16 |
EG11547A (en) | 1977-12-31 |
CA1013292A (en) | 1977-07-05 |
IS1043B6 (en) | 1980-12-16 |
IT1031305B (en) | 1979-04-30 |
SE410326B (en) | 1979-10-08 |
US3900371A (en) | 1975-08-19 |
TR18265A (en) | 1976-11-10 |
BR7500573A (en) | 1975-11-11 |
SE7500956L (en) | 1975-07-31 |
NL7501038A (en) | 1975-08-01 |
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