FR2405902A1 - Coarse alumina prodn. by Bayer process - by seeding part of pregnant liquid in agglomeration stage and rest in cementation stage - Google Patents

Coarse alumina prodn. by Bayer process - by seeding part of pregnant liquid in agglomeration stage and rest in cementation stage

Info

Publication number
FR2405902A1
FR2405902A1 FR7804697A FR7804697A FR2405902A1 FR 2405902 A1 FR2405902 A1 FR 2405902A1 FR 7804697 A FR7804697 A FR 7804697A FR 7804697 A FR7804697 A FR 7804697A FR 2405902 A1 FR2405902 A1 FR 2405902A1
Authority
FR
France
Prior art keywords
stage
cementation
agglomeration
prodn
rest
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
FR7804697A
Other languages
French (fr)
Other versions
FR2405902B1 (en
Inventor
Mikio Kanehara
Akio Kainuma
Mitsuyoshi Fujiike
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.)
Nippon Light Metal Co Ltd
Original Assignee
Nippon Light Metal 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 Nippon Light Metal Co Ltd filed Critical Nippon Light Metal Co Ltd
Publication of FR2405902A1 publication Critical patent/FR2405902A1/en
Application granted granted Critical
Publication of FR2405902B1 publication Critical patent/FR2405902B1/fr
Granted 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
    • C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
    • C01F7/144—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by precipitation due to cooling, e.g. as part of the Bayer process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer

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

Procédé de production d'alumine en gros grains par hydrolyse d'une liqueur ensemencée. Il comprend les étapes consistant à distribuer la liqueur ensemencee à une ligne de croissance par agglomération et à une ligne de croissance par cémentation, ladite ligne de croissance par agglomération servant à ajouter de la semence fine à la liqueur ensemencée distribuée dans la première ligne de maniere à agglomérer et faire croître la semence fine, et à ajouter en tant que semence les particules relativement grosses obtenues surtout dans la première ligne de façon à continuer le processus d'hydrolyse, ladite ligne de croissance par cémentation servant à ajouter des particules relativement grosses obtenues de cette seconde ligne à la liqueur ensemencée distribuée à cette seconde ligne de manière à hydrolyser la liqueur ensemencée. Application à la production de l'alumine.A process for producing coarse-grained alumina by hydrolysis of a seed liquor. It comprises the steps of distributing the seeded liquor to an agglomeration growth line and to a cementation growth line, said agglomeration growth line serving to add fine seed to the seeded liquor distributed in the first row. to agglomerate and grow the fine seed, and to add as seed the relatively large particles obtained especially in the first row so as to continue the hydrolysis process, said growth line by cementation serving to add relatively large particles obtained from this second line to the seeded liquor distributed to this second line so as to hydrolyze the seeded liquor. Application to the production of alumina.

FR7804697A 1977-10-17 1978-02-20 Coarse alumina prodn. by Bayer process - by seeding part of pregnant liquid in agglomeration stage and rest in cementation stage Granted FR2405902A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12345677A JPS5456999A (en) 1977-10-17 1977-10-17 Preparation of crude alumina particles

Publications (2)

Publication Number Publication Date
FR2405902A1 true FR2405902A1 (en) 1979-05-11
FR2405902B1 FR2405902B1 (en) 1981-05-29

Family

ID=14861055

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7804697A Granted FR2405902A1 (en) 1977-10-17 1978-02-20 Coarse alumina prodn. by Bayer process - by seeding part of pregnant liquid in agglomeration stage and rest in cementation stage

Country Status (6)

Country Link
JP (1) JPS5456999A (en)
AU (1) AU506136B2 (en)
DE (1) DE2807245C2 (en)
FR (1) FR2405902A1 (en)
HU (1) HU178662B (en)
YU (1) YU38478A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991012205A1 (en) * 1990-02-14 1991-08-22 Alcan International Limited Process for the precipitating of aluminium hydroxide from bayer process liquor
WO1993011072A1 (en) * 1991-11-26 1993-06-10 Alcan International Limited Improved process for producing low soda alumina

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4305913A (en) * 1980-08-06 1981-12-15 Kaiser Aluminum & Chemical Corporation Alumina hydrate production from Bayer liquor by seeding
JPS57140316A (en) * 1981-02-20 1982-08-30 Sumitomo Alum Smelt Co Ltd Manufacture of coarse granular aluminum hydroxide
JPS6085789U (en) * 1983-11-18 1985-06-13 福岡　敏郎 magnetic recording tape
US4511542A (en) * 1984-05-24 1985-04-16 Kaiser Aluminum & Chemical Corporation Bayer process production of alumina hydrate
JPH0314792U (en) * 1989-06-22 1991-02-14
JP5285317B2 (en) * 2008-03-28 2013-09-11 住友化学株式会社 Method for producing aluminum hydroxide

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707669A (en) * 1951-02-06 1955-05-03 Kaiser Aluminium Chem Corp Alumina production
CH441251A (en) * 1963-05-06 1967-08-15 Aluminium Lab Ltd Process for preparing alumina trihydrate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707669A (en) * 1951-02-06 1955-05-03 Kaiser Aluminium Chem Corp Alumina production
CH441251A (en) * 1963-05-06 1967-08-15 Aluminium Lab Ltd Process for preparing alumina trihydrate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991012205A1 (en) * 1990-02-14 1991-08-22 Alcan International Limited Process for the precipitating of aluminium hydroxide from bayer process liquor
AU635821B2 (en) * 1990-02-14 1993-04-01 Alcan International Limited Process for precipitating of aluminium hydroxide from bayer process liquor
WO1993011072A1 (en) * 1991-11-26 1993-06-10 Alcan International Limited Improved process for producing low soda alumina

Also Published As

Publication number Publication date
DE2807245A1 (en) 1979-05-03
YU38478A (en) 1982-06-30
JPS5761692B2 (en) 1982-12-25
AU506136B2 (en) 1979-12-13
AU3342178A (en) 1979-08-30
JPS5456999A (en) 1979-05-08
HU178662B (en) 1982-06-28
DE2807245C2 (en) 1983-05-11
FR2405902B1 (en) 1981-05-29

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Legal Events

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