GB1294909A - - Google Patents

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Publication number
GB1294909A
GB1294909A GB1294909DA GB1294909A GB 1294909 A GB1294909 A GB 1294909A GB 1294909D A GB1294909D A GB 1294909DA GB 1294909 A GB1294909 A GB 1294909A
Authority
GB
United Kingdom
Prior art keywords
cell
values
value
short circuit
predetermined value
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
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 filed Critical
Publication of GB1294909A publication Critical patent/GB1294909A/en
Expired legal-status Critical Current

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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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

1294909 Controlling electrolytic alumina cells ALCAN RESEARCH & DEVELOPMENT Ltd 1 June 1970 26396/70 Heading C7B A method of controlling an electrolytic alumina reduction cell in order to avoid partial short circuits produced, for instance by pieces of floating carbon or by projections forming on the anodes, comprises taking simultaneous measurements of cell voltage and current, the values observed fluctuating with time; extrapolating the measurements to obtain the back e.m.f. of the cell; comparing this value of the back e.m.f. with a predetermined value; and if the determined value is less than the predetermined value (which indicates the presence of a short circuit), taking action to remove the cause of the short circuit. Apparatus used may include means for sampling and voltage and current values and a computer which receives, stores and extrapolates the values and prints out the results.
GB1294909D 1970-06-01 1970-06-01 Expired GB1294909A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2639670 1970-06-01

Publications (1)

Publication Number Publication Date
GB1294909A true GB1294909A (en) 1972-11-01

Family

ID=10242993

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1294909D Expired GB1294909A (en) 1970-06-01 1970-06-01

Country Status (2)

Country Link
CA (1) CA945512A (en)
GB (1) GB1294909A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008142A (en) * 1973-07-25 1977-02-15 Siemens Aktiengesellschaft Apparatus for operating the furnaces of an electrolysis plant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008142A (en) * 1973-07-25 1977-02-15 Siemens Aktiengesellschaft Apparatus for operating the furnaces of an electrolysis plant

Also Published As

Publication number Publication date
CA945512A (en) 1974-04-16

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee