FR2060436A1 - Diaspore-contg. bauxiteette decompsn. - by continuous Bayer process - Google Patents

Diaspore-contg. bauxiteette decompsn. - by continuous Bayer process

Info

Publication number
FR2060436A1
FR2060436A1 FR7032339A FR7032339A FR2060436A1 FR 2060436 A1 FR2060436 A1 FR 2060436A1 FR 7032339 A FR7032339 A FR 7032339A FR 7032339 A FR7032339 A FR 7032339A FR 2060436 A1 FR2060436 A1 FR 2060436A1
Authority
FR
France
Prior art keywords
diaspore
stage
bauxite
slurry
bauxiteette
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
FR7032339A
Other languages
French (fr)
Other versions
FR2060436B1 (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.)
MAGYAR ALUMINIUM
Original Assignee
MAGYAR ALUMINIUM
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 MAGYAR ALUMINIUM filed Critical MAGYAR ALUMINIUM
Publication of FR2060436A1 publication Critical patent/FR2060436A1/en
Application granted granted Critical
Publication of FR2060436B1 publication Critical patent/FR2060436B1/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
    • C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
    • C01F7/062—Digestion

Abstract

Decomposition is carried out in two stages. In first, slurry of bauxite containing diaspore and Na aluminate liquor is heated above 220 degrees C until diaspore has decomposed. Slurry then passes to second stage, where it is mixed with pref. preheated slurry stream of bauxite, containing boehmite and opt. hydrargillite, and Na aluminate, using stay time sufficient to decompose boehmite and opt. hydrargillite. Process can be carried out in series of autoclaves, providing higher temp. needed to decompose diaspore in first stage. It is more economical than usual for treatment of bauxite containing diaspore, since steam consumption is lower than for one-stage process and plant capacity somewhat higher.
FR7032339A 1969-09-06 1970-09-04 Diaspore-contg. bauxiteette decompsn. - by continuous Bayer process Granted FR2060436A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUFE000776 1969-09-06

Publications (2)

Publication Number Publication Date
FR2060436A1 true FR2060436A1 (en) 1971-06-18
FR2060436B1 FR2060436B1 (en) 1976-09-03

Family

ID=10996082

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7032339A Granted FR2060436A1 (en) 1969-09-06 1970-09-04 Diaspore-contg. bauxiteette decompsn. - by continuous Bayer process

Country Status (4)

Country Link
DE (1) DE2043986A1 (en)
FR (1) FR2060436A1 (en)
RO (1) RO56332A (en)
SU (1) SU474127A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113247924A (en) * 2021-05-10 2021-08-13 中国铝业股份有限公司 Two-stage low-temperature digestion method for boehmite-gibbsite mixed bauxite

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701752A (en) * 1951-12-19 1955-02-08 Kaiser Aluminium Chem Corp Process for the production of alumina
FR1280009A (en) * 1960-11-15 1961-12-29 Pechiney Prod Chimiques Sa Process for dissolving alumina in bauxites

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701752A (en) * 1951-12-19 1955-02-08 Kaiser Aluminium Chem Corp Process for the production of alumina
FR1280009A (en) * 1960-11-15 1961-12-29 Pechiney Prod Chimiques Sa Process for dissolving alumina in bauxites

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113247924A (en) * 2021-05-10 2021-08-13 中国铝业股份有限公司 Two-stage low-temperature digestion method for boehmite-gibbsite mixed bauxite

Also Published As

Publication number Publication date
DE2043986A1 (en) 1971-04-01
SU474127A3 (en) 1975-06-14
FR2060436B1 (en) 1976-09-03
RO56332A (en) 1974-04-29

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Legal Events

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ST Notification of lapse