GB1270398A - Improvements in or relating to reduction cell operation - Google Patents

Improvements in or relating to reduction cell operation

Info

Publication number
GB1270398A
GB1270398A GB09514/69A GB1951469A GB1270398A GB 1270398 A GB1270398 A GB 1270398A GB 09514/69 A GB09514/69 A GB 09514/69A GB 1951469 A GB1951469 A GB 1951469A GB 1270398 A GB1270398 A GB 1270398A
Authority
GB
United Kingdom
Prior art keywords
cell
aluminium
alumina
resistance level
fluoride
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.)
Expired
Application number
GB09514/69A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaiser Aluminum and Chemical Corp
Original Assignee
Kaiser Aluminum and Chemical Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kaiser Aluminum and Chemical Corp filed Critical Kaiser Aluminum and Chemical Corp
Publication of GB1270398A publication Critical patent/GB1270398A/en
Expired legal-status Critical Current

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)
  • Control Of Non-Electrical Variables (AREA)

Abstract

1,270,398. Control of fused-bath aluminium electrolytic cells. KAISER ALUMINUM & CHEMICAL CORP. April 16, 1969 [May 24, 1968], No. 19514/69. Heading C7B. The feeding of alumina to an electrolytic reduction cell containing alumina and aluminium fluoride for the production of aluminium is controlled by a process comprising (a) obtaining measurements of the cell voltage and current at spaced time intervals, (b) periodically deriving therefrom a base resistance level for the cell, (c) periodically deriving a smoothed resistance level for the cell from a series of sequent measurements, and when the smoothed resistance level exceeds the base resistance level by more than a given amount, (d) adding a controlled amount alumina to the cell to restore the concentration in the cell to a desired value above that at which the decomposition voltage for aluminium fluoride is reached. The process may be operated automatically by computor. The cell shown comprises a steel shell 10; insulating layer 12 of alumina, bauxite, clay, aluminium silicate or brick; a lining 14 of carbon, silicon carbide or other refractory material, through which extends cathodic collector bars 30; prebaked carbon anodes 20 connected to anode busbar 28 and feed hopper 26. A computor 40 controls feeding of the cell and adjustment of the anode position. Calcium fluoride may also be present in the bath.
GB09514/69A 1968-05-24 1969-04-16 Improvements in or relating to reduction cell operation Expired GB1270398A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73190168A 1968-05-24 1968-05-24

Publications (1)

Publication Number Publication Date
GB1270398A true GB1270398A (en) 1972-04-12

Family

ID=24941386

Family Applications (1)

Application Number Title Priority Date Filing Date
GB09514/69A Expired GB1270398A (en) 1968-05-24 1969-04-16 Improvements in or relating to reduction cell operation

Country Status (5)

Country Link
US (1) US3625842A (en)
JP (1) JPS5015724B1 (en)
DE (1) DE1926099A1 (en)
FR (1) FR2009258A1 (en)
GB (1) GB1270398A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847761A (en) * 1972-04-06 1974-11-12 Aluminum Co Of America Bath control
US3888747A (en) * 1972-10-18 1975-06-10 Nat Southwire Aluminum Method of and apparatus for producing metal
AT329893B (en) * 1973-07-25 1976-06-10 Vaw Ver Aluminium Werke Ag PROCEDURE AND ARRANGEMENT FOR OPERATING AN ELECTROLYSIS PLANT, IN PARTICULAR AN ALUMINUM ELECTROLYSIS PLANT
JPS59192068U (en) * 1983-06-09 1984-12-20 三菱重工業株式会社 Defective sheet removal device
CA1219636A (en) * 1984-01-18 1987-03-24 Andrew E. Deczky Data acquisition system for the computer control of aluminum smelters
DE3564825D1 (en) * 1985-03-18 1988-10-13 Alcan Int Ltd Controlling alf 3 addition to al reduction cell electrolyte
US4654130A (en) * 1986-05-15 1987-03-31 Reynolds Metals Company Method for improved alumina control in aluminum electrolytic cells employing point feeders
US4814050A (en) * 1986-10-06 1989-03-21 Aluminum Company Of America Estimation and control of alumina concentration in hall cells
US4786379A (en) * 1988-02-22 1988-11-22 Reynolds Metal Company Measuring current distribution in an alumina reduction cell
ATE133721T1 (en) * 1989-02-24 1996-02-15 Comalco Alu CONTROL PROCEDURES FOR ALUMINUM MELTING FURNACES
FR2727985B1 (en) * 1994-12-09 1997-01-24 Pechiney Aluminium METHOD AND DEVICE FOR MEASURING THE TEMPERATURE AND LEVEL OF THE MELT ELECTROLYSIS BATH IN ALUMINUM PRODUCTION TANKS
US20070295615A1 (en) * 2006-06-27 2007-12-27 Alcoa Inc. Systems and methods useful in controlling operations of metal electrolysis cells
CA2671066C (en) * 2006-12-19 2016-07-26 Michael Schneller Aluminum production process control

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB337995A (en) * 1928-11-27 1930-11-13 Vaw Ver Aluminium Werke Ag Improvements in and relating to the electrolytic production of aluminium
CH412351A (en) * 1961-10-17 1966-04-30 Alusuisse Method for operating an aluminum electrolysis furnace
CH417125A (en) * 1963-08-30 1966-07-15 Alusuisse Process for the automatic regulation of the terminal voltage in a system for the electrolytic production of aluminum in the fluoride melt flow and a system provided with the corresponding regulating device
FR1397946A (en) * 1964-01-14 1965-05-07 Pechiney Process for the prediction of burns, the systematic feeding and automatic regulation of the anode system of the tanks for the igneous electrolysis of alumina
US3380897A (en) * 1964-11-16 1968-04-30 Reynolds Metals Co Method of determining ore concentration
US3573179A (en) * 1965-12-14 1971-03-30 Ibm Method and apparatus for the control of electrolytic refining cells

Also Published As

Publication number Publication date
DE1926099A1 (en) 1969-12-04
FR2009258A1 (en) 1970-01-30
JPS5015724B1 (en) 1975-06-07
US3625842A (en) 1971-12-07

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