GB1111681A - Improvements in or relating to the calcination of alumina - Google Patents

Improvements in or relating to the calcination of alumina

Info

Publication number
GB1111681A
GB1111681A GB4678/64A GB467864A GB1111681A GB 1111681 A GB1111681 A GB 1111681A GB 4678/64 A GB4678/64 A GB 4678/64A GB 467864 A GB467864 A GB 467864A GB 1111681 A GB1111681 A GB 1111681A
Authority
GB
United Kingdom
Prior art keywords
alumina
silica
siliceous material
particles
mesh
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
GB4678/64A
Inventor
Vernon James Hill
Peter Ayers
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.)
British Aluminum Co Ltd
Original Assignee
British Aluminum Co 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 British Aluminum Co Ltd filed Critical British Aluminum Co Ltd
Priority to GB4678/64A priority Critical patent/GB1111681A/en
Publication of GB1111681A publication Critical patent/GB1111681A/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
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/021—After-treatment of oxides or hydroxides
    • 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
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/46—Purification of aluminium oxide, aluminium hydroxide or aluminates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

A method of calcining soda-containing alumina comprises incorporating in the alumina a proportion of silica or siliceous material capable of combining with soda at temperatures greater than 1100 DEG C. and fluidizing the mixture at a temperature greater than 1100 DEG C., but preferably not greater than 1450 DEG C. The silica or siliceous material may be incorporated in a ratio of 2 to 20% by weight of the alumina, and may be in the form of silica gel or sand. To permit separation of the particles of silica or siliceous material from the particle of alumina, the particles are arranged to have different particle sizes, e.g. 72 to 10 B.S. mesh for the silica or siliceous particles and 50 to 325 B.S. mesh for the alumina particles. The silica or siliceous material should preferably have a particle size larger than that of the alumina by at least 25 B.S. mesh. The mixture of alumina and silica or siliceous material may be fluidized with nitrogen and the bed heated electrically with an external graphite resistor.
GB4678/64A 1964-08-04 1964-08-04 Improvements in or relating to the calcination of alumina Expired GB1111681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4678/64A GB1111681A (en) 1964-08-04 1964-08-04 Improvements in or relating to the calcination of alumina

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4678/64A GB1111681A (en) 1964-08-04 1964-08-04 Improvements in or relating to the calcination of alumina

Publications (1)

Publication Number Publication Date
GB1111681A true GB1111681A (en) 1968-05-01

Family

ID=9781719

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4678/64A Expired GB1111681A (en) 1964-08-04 1964-08-04 Improvements in or relating to the calcination of alumina

Country Status (1)

Country Link
GB (1) GB1111681A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2375153A1 (en) * 1976-12-22 1978-07-21 Dynamit Nobel Ag PROCESS FOR OBTAINING MOLTEN ELECTRO-CORUNDUM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2375153A1 (en) * 1976-12-22 1978-07-21 Dynamit Nobel Ag PROCESS FOR OBTAINING MOLTEN ELECTRO-CORUNDUM

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