NO900800L - PROCEDURE FOR REGULATING ALUMINUM MELT CELLS. - Google Patents
PROCEDURE FOR REGULATING ALUMINUM MELT CELLS.Info
- Publication number
- NO900800L NO900800L NO90900800A NO900800A NO900800L NO 900800 L NO900800 L NO 900800L NO 90900800 A NO90900800 A NO 90900800A NO 900800 A NO900800 A NO 900800A NO 900800 L NO900800 L NO 900800L
- Authority
- NO
- Norway
- Prior art keywords
- cell
- resistance
- heat
- calculation
- target
- Prior art date
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title abstract 4
- 229910052782 aluminium Inorganic materials 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- 230000001105 regulatory effect Effects 0.000 title abstract 2
- 235000010210 aluminium Nutrition 0.000 abstract 3
- 238000007792 addition Methods 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 1
- 230000007717 exclusion Effects 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 abstract 1
Landscapes
- Electrolytic Production Of Metals (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
Fremgangsmåte for regulering av en alumlnlumsmeltecelle omfattende styring av cellespennlng og -strora, alumlnlumoksydtllsetnlnger, andre tilsetninger, operasjoner og anode til katodeavstandbevegelser, kontinuerlig beregning av cellemotstanden og badets spesifikke motstand fra nevnt styrte cellespennlng og -stram, styring av forekonsten av lavfrekvent og heyfrekvent stay 1 cellespennlngen, kontinuerlig beregning av tldshastlgheten for forandring av motstanden 1 cellen, utelukking av beregning i en forhåndsbestemt tid når det forekommer en aluralnlum- oksydtllsetnlng, annen tilsetning, operasjon eller ACD- bevegelse, etablering av filtrert motstandshelnings- terskler, bestemmelse av om den lavfrekvente steyen er over en forhåndsbestemt terskel, og om så, ekning av de filtrerte helnlngstersklene for lav alumlnlumoksyd- konsentrasjonspåvlsnlng, beregning av en aluminium- oksydbeholdnlng fra aluralnlumtllsetnlngene, bestemmelse av om cellen er overmåtet. og om Ikke, matnlng av aluminiumoksyd for å hindre en anodepåvirknlng, beregning av den varme som tilfares og varme som kreves for aluminlumproduksjon, beregning av den varme som er tilgjengelig for spredning, beregning av raålvarmen for cellen, beregning av forskjellen mellom den tilgjen- gelige varmen og raålvarmen med hensyn på tiden, beregning av en lapende varmebeholdnlng fra Integralet av denne forskjell, etablering av en målmotstand for cellen og modifisering av denne målmotstanden for å oppnå et nullvarmelntegral, sjekking av om målmotstanden er on tillatelig verdi, og bevegelse av anodene 1 cellen for å etablere den nye målmotstanden, beregning av tldshastlgheten for forandring av badets spesifikke motstand og sjekking av om den spesifikke motstanden og derivater er starre enn forhåndsbestemte grenser, og om så, Justering av raålvarmen for cellen for å ved- likeholde den langvarige varmebalansen i cellen.A method of regulating an aluminum melt cell comprising control of cell voltage and current, aluminum oxide counts, other additions, operations and anode for cathode spacer movements, continuous calculation of cell resistance and bath specific resistance of said controlled cell voltage and current voltage and current, cell voltage, continuous calculation of the rate of change of resistance of the cell, exclusion of calculation for a predetermined time when there is an aluminal oxide exposure, other addition, operation or ACD movement, establishment of filtered resistance threshold threshold, determination of filter resistance is above a predetermined threshold, and if so, increasing the filtered saline thresholds for low alumina concentration, calculating an aluminum oxide stock from the alu- minum, determining whether the cell is oversaturated. and if not, alumina feeding to prevent anode influence, calculation of the heat supplied and heat required for aluminum production, calculation of the heat available for dissipation, calculation of the target heat for the cell, calculation of the difference between the available the heat and the target heat with respect to time, calculating a current heat stock from the Integral of this difference, establishing a target resistance for the cell and modifying this target resistance to obtain a zero-heat integral, checking whether the target resistance is of permissible value, and moving the anodes 1 the cell for establishing the new target resistance, calculating the rate of change of the specific resistance of the bath and checking whether the specific resistance and derivatives are stronger than predetermined limits, and if so, Adjusting the target heat for the cell to maintain the long term cell.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU293889 | 1989-02-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO900800D0 NO900800D0 (en) | 1990-02-20 |
| NO900800L true NO900800L (en) | 1990-08-27 |
Family
ID=3693431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO90900800A NO900800L (en) | 1989-02-24 | 1990-02-20 | PROCEDURE FOR REGULATING ALUMINUM MELT CELLS. |
Country Status (1)
| Country | Link |
|---|---|
| NO (1) | NO900800L (en) |
-
1990
- 1990-02-20 NO NO90900800A patent/NO900800L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO900800D0 (en) | 1990-02-20 |
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