GB1415856A - Process for separating cryolite and carbon - Google Patents

Process for separating cryolite and carbon

Info

Publication number
GB1415856A
GB1415856A GB1973772A GB1973772A GB1415856A GB 1415856 A GB1415856 A GB 1415856A GB 1973772 A GB1973772 A GB 1973772A GB 1973772 A GB1973772 A GB 1973772A GB 1415856 A GB1415856 A GB 1415856A
Authority
GB
United Kingdom
Prior art keywords
cryolite
bed
carbon
temperature
conveyer
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
GB1973772A
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.)
DUTTON WASTE RECOVERY Ltd
Original Assignee
DUTTON WASTE RECOVERY Ltd
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 DUTTON WASTE RECOVERY Ltd filed Critical DUTTON WASTE RECOVERY Ltd
Priority to GB1973772A priority Critical patent/GB1415856A/en
Priority to ES1973190047U priority patent/ES190047Y/en
Publication of GB1415856A publication Critical patent/GB1415856A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/48—Halides, with or without other cations besides aluminium
    • C01F7/50—Fluorides
    • C01F7/54—Double compounds containing both aluminium and alkali metals or alkaline-earth metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

1415856 Recovery of cryolite DUTTON WASTE RECOVERY Ltd 27 April 1973 [27 April 1972] 19737/72 Heading C1A [Also in Division F4] A cryolite carbon mixture from the linings of electrolytic aluminium pots is crushed at 3 and 5 and fed to a fluidized bed 10, supplied with fluidizing air and fuel gas. The temperature of the bed is maintained below the melting temperature of the cryolite by a cooling pipe 13 immersed in the bed, and the cryolite is removed by a conveyer 14. Cryolite dust carried off in the flue gases is removed in a filter plant 18 and fed to the conveyer 14. In another embodiment, cryolite dust is removed from the flue gases in a cyclone and returned to the fluidized bed, the waste gases pass through a heat exchanger and are partly recycled. The proportion of gas recycled gives a coarse control of the bed temperature, which is closely controlled by the immersed cooling coil. Cryolite taken from the bed may be returned to reduce the carbon content still further, or more carbon may be removed in a gas fired furnace.
GB1973772A 1972-04-27 1972-04-27 Process for separating cryolite and carbon Expired GB1415856A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1973772A GB1415856A (en) 1972-04-27 1972-04-27 Process for separating cryolite and carbon
ES1973190047U ES190047Y (en) 1972-04-27 1973-03-27 FLUIDIZED BED COMBUSTION CHAMBER.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1973772A GB1415856A (en) 1972-04-27 1972-04-27 Process for separating cryolite and carbon

Publications (1)

Publication Number Publication Date
GB1415856A true GB1415856A (en) 1975-11-26

Family

ID=10134364

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1973772A Expired GB1415856A (en) 1972-04-27 1972-04-27 Process for separating cryolite and carbon

Country Status (2)

Country Link
ES (1) ES190047Y (en)
GB (1) GB1415856A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053375A (en) * 1976-07-16 1977-10-11 Dorr-Oliver Incorporated Process for recovery of alumina-cryolite waste in aluminum production
CN105502452A (en) * 2015-12-08 2016-04-20 北京京碧蓝环保科技有限公司 Method for recovering cryolite and carrying out tail gas treatment during heat treatment of waste aluminum electrolysis bath liners

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053375A (en) * 1976-07-16 1977-10-11 Dorr-Oliver Incorporated Process for recovery of alumina-cryolite waste in aluminum production
CN105502452A (en) * 2015-12-08 2016-04-20 北京京碧蓝环保科技有限公司 Method for recovering cryolite and carrying out tail gas treatment during heat treatment of waste aluminum electrolysis bath liners
CN105502452B (en) * 2015-12-08 2017-11-24 北京京碧蓝环保科技有限公司 Ice crystal is reclaimed in aluminium electroloysis waste lining heat treatment process to go forward side by side the method for end of line gas disposal

Also Published As

Publication number Publication date
ES190047U (en) 1974-04-16
ES190047Y (en) 1974-10-16

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed