GB2019369A - Improvements relating to the production of anhydrous alumina - Google Patents

Improvements relating to the production of anhydrous alumina

Info

Publication number
GB2019369A
GB2019369A GB7913401A GB7913401A GB2019369A GB 2019369 A GB2019369 A GB 2019369A GB 7913401 A GB7913401 A GB 7913401A GB 7913401 A GB7913401 A GB 7913401A GB 2019369 A GB2019369 A GB 2019369A
Authority
GB
United Kingdom
Prior art keywords
alumina
suspended
precalcined
separated
zone
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.)
Granted
Application number
GB7913401A
Other versions
GB2019369B (en
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.)
FLSmidth and Co AS
Original Assignee
FLSmidth and Co 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 FLSmidth and Co AS filed Critical FLSmidth and Co AS
Priority to GB7913401A priority Critical patent/GB2019369B/en
Priority to IT22000/79A priority patent/IT1166752B/en
Publication of GB2019369A publication Critical patent/GB2019369A/en
Application granted granted Critical
Publication of GB2019369B publication Critical patent/GB2019369B/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
    • C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
    • C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
    • C01F7/444—Apparatus therefor
    • 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
    • C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
    • C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area

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 and apparatus for producing anhydrous alumina from alumina trihydrate are disclosed in which free and chemically bound water is at last partially removed in a precalcining zone. For example, the alumina trihydrate (from 6) is suspended in and heated by a stream of hot gases from cyclone (2), separated in (1), suspended in and heated by hot gases from (3), and separated in (2), whereafter the precalcined dehydrated alumina is recrystallized at least partially to alpha -alumina in a reaction chamber (4) provided with means (7,8) for feeding fuel and oxygen containing gas to a combustion zone in the chamber (4) by further heating the precalcined alumina by suspending the material in hot combustion gases by intimate mixing of the precalcined alumina and fuel followed by suspension of this mixture in the oxygen containing gas fed to the combustion zone. The at last partially recrystallized alumina is then carried out of the reaction chamber (4) suspended in the combustion gas stream, separated from the gas stream in a particle/gas separator (3) and subjected to rapid cooling in a cooling zone (5). <IMAGE>
GB7913401A 1978-04-20 1979-04-18 Production of anhydrous alumina Expired GB2019369B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB7913401A GB2019369B (en) 1978-04-20 1979-04-18 Production of anhydrous alumina
IT22000/79A IT1166752B (en) 1978-04-20 1979-04-19 PROCEDURE FOR THE PRODUCTION OF ALUMINUM ANHYDROUS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1568978 1978-04-20
GB7913401A GB2019369B (en) 1978-04-20 1979-04-18 Production of anhydrous alumina

Publications (2)

Publication Number Publication Date
GB2019369A true GB2019369A (en) 1979-10-31
GB2019369B GB2019369B (en) 1982-12-01

Family

ID=26251474

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7913401A Expired GB2019369B (en) 1978-04-20 1979-04-18 Production of anhydrous alumina

Country Status (2)

Country Link
GB (1) GB2019369B (en)
IT (1) IT1166752B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997018165A1 (en) * 1995-11-14 1997-05-22 Metallgesellschaft Aktiengesellschaft Process for producing aluminium oxide from aluminium hydroxide
WO1999041199A1 (en) * 1998-02-13 1999-08-19 Metallgesellschaft Aktiengesellschaft Method for final cooling anhydrous aluminum oxide
WO2001021530A1 (en) * 1999-09-17 2001-03-29 Outokumpu Oyj Device for thermally treating granular solid matter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997018165A1 (en) * 1995-11-14 1997-05-22 Metallgesellschaft Aktiengesellschaft Process for producing aluminium oxide from aluminium hydroxide
US6015539A (en) * 1995-11-14 2000-01-18 Metallgesellschaft Aktiengesellschaft Fluidized bed process for producing alumina from aluminum hydroxide
AU728011B2 (en) * 1995-11-14 2001-01-04 Outotec Oyj Fluidized bed process for producing alumina from aluminum hydroxide
WO1999041199A1 (en) * 1998-02-13 1999-08-19 Metallgesellschaft Aktiengesellschaft Method for final cooling anhydrous aluminum oxide
WO2001021530A1 (en) * 1999-09-17 2001-03-29 Outokumpu Oyj Device for thermally treating granular solid matter

Also Published As

Publication number Publication date
GB2019369B (en) 1982-12-01
IT1166752B (en) 1987-05-06
IT7922000A0 (en) 1979-04-19

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Legal Events

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

Effective date: 19930418