FR2198773A1 - Filter for gas from aluminium electrolyser - electrostatic precipitator removes heavy metals from and alumina then absorbs fluorine cpds - Google Patents

Filter for gas from aluminium electrolyser - electrostatic precipitator removes heavy metals from and alumina then absorbs fluorine cpds

Info

Publication number
FR2198773A1
FR2198773A1 FR7332174A FR7332174A FR2198773A1 FR 2198773 A1 FR2198773 A1 FR 2198773A1 FR 7332174 A FR7332174 A FR 7332174A FR 7332174 A FR7332174 A FR 7332174A FR 2198773 A1 FR2198773 A1 FR 2198773A1
Authority
FR
France
Prior art keywords
alumina
cpds
electrostatic precipitator
filter
gas
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.)
Withdrawn
Application number
FR7332174A
Other languages
French (fr)
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.)
Ardal og Sunndal Verk AS
Original Assignee
Ardal og Sunndal Verk AS
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 Ardal og Sunndal Verk AS filed Critical Ardal og Sunndal Verk AS
Publication of FR2198773A1 publication Critical patent/FR2198773A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/019—Post-treatment of gases
    • 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
    • C25C3/22—Collecting emitted gases

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrostatic Separation (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

A filter appts. for gases evolved from an electrolytic cell used for making Al consists of an electrostatic precipitator, in which the gas stays for 0.1 - 1.0 sec., with an arrangement for injecting alumina into the gas flow immediately it leaves the precipitator, the alumina being esp. intended to remove F cpds., while the electrostatic precipitator removes mainly heavy metals, partic. Fe cpds., with possibly some tar from the baked C electrodes, though a much longer stay in the precipitator would be needed for complete tar removal. The gases and alumina pass to a bag filter, while the alumina with absorbed F cpds. is sent to the electrolytic cell. In this way the presence of Fe cpds. in the alumina, with consequently adverse affect on aluminium quality, is avoided.
FR7332174A 1972-09-07 1973-09-06 Filter for gas from aluminium electrolyser - electrostatic precipitator removes heavy metals from and alumina then absorbs fluorine cpds Withdrawn FR2198773A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO317972 1972-09-07

Publications (1)

Publication Number Publication Date
FR2198773A1 true FR2198773A1 (en) 1974-04-05

Family

ID=19879437

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7332174A Withdrawn FR2198773A1 (en) 1972-09-07 1973-09-06 Filter for gas from aluminium electrolyser - electrostatic precipitator removes heavy metals from and alumina then absorbs fluorine cpds

Country Status (7)

Country Link
AU (1) AU5997573A (en)
DE (1) DE2345295A1 (en)
ES (1) ES418524A1 (en)
FR (1) FR2198773A1 (en)
IS (1) IS2171A7 (en)
IT (1) IT996136B (en)
NL (1) NL7312413A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2407228A1 (en) * 2010-07-14 2012-01-18 Alstom Technology Ltd Gas cleaning unit and method for cleaning gas

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100381612C (en) * 2006-11-28 2008-04-16 沈阳铝镁设计研究院 Fume purifying process and system for aluminium electrolyzing anode roaster

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2407228A1 (en) * 2010-07-14 2012-01-18 Alstom Technology Ltd Gas cleaning unit and method for cleaning gas
WO2012007809A1 (en) * 2010-07-14 2012-01-19 Alstom Technology Ltd Integrated heat exchanger
US8979980B2 (en) 2010-07-14 2015-03-17 Alstom Technology Ltd Gas cleaning unit and method for cleaning gas

Also Published As

Publication number Publication date
NL7312413A (en) 1974-03-11
IS2171A7 (en) 1973-11-02
ES418524A1 (en) 1976-03-16
IT996136B (en) 1975-12-10
AU5997573A (en) 1975-03-06
DE2345295A1 (en) 1974-03-21

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Legal Events

Date Code Title Description
ST Notification of lapse