CA2226842A1 - Procede par precipitation a rendement eleve - Google Patents

Procede par precipitation a rendement eleve Download PDF

Info

Publication number
CA2226842A1
CA2226842A1 CA002226842A CA2226842A CA2226842A1 CA 2226842 A1 CA2226842 A1 CA 2226842A1 CA 002226842 A CA002226842 A CA 002226842A CA 2226842 A CA2226842 A CA 2226842A CA 2226842 A1 CA2226842 A1 CA 2226842A1
Authority
CA
Canada
Prior art keywords
liquor
caustic
slurry
precipitation
stage
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.)
Abandoned
Application number
CA002226842A
Other languages
English (en)
Inventor
Gregory Patrick Brown
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.)
Rio Tinto Aluminium Ltd
Original Assignee
Individual
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
Priority claimed from AUPN4107A external-priority patent/AUPN410795A0/en
Priority claimed from AUPN4785A external-priority patent/AUPN478595A0/en
Application filed by Individual filed Critical Individual
Publication of CA2226842A1 publication Critical patent/CA2226842A1/fr
Abandoned 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
    • 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
    • C01P2004/50—Agglomerated particles
    • 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

Abstract

L'invention porte sur un procédé qui permet de précipiter de l'hydroxyde d'aluminium à partir d'une liqueur caustique sursaturée, consistant à amener cette liqueur (10) à une phase de précipitation dans le cadre d'une installation de type Bayer. Cette phase de précipitation comporte une étape d'agglomération (A1, A2) et une étape de croissance (G1, G2... dernier G). La précipitation d'hydroxyde d'aluminium qui se réalise lors de la phase de précipitation doit donner lieu à une bouillie épaisse constituée d'hydroxyde d'aluminium précipité dans la liqueur caustique. Durant le processus de précipitation, l'adjonction à cette bouillie d'un courant aqueux (115) a pour effet d'y diluer la teneur en substance caustique de la liqueur, ce qui augmente la force présidant au processus de précipitation et, partant, accroît le rendement du procédé par précipitation. Il est possible d'allonger la bouillie épaisse par le biais d'un ou de plusieurs courants de dilution.
CA002226842A 1995-07-11 1996-07-11 Procede par precipitation a rendement eleve Abandoned CA2226842A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPN4107A AUPN410795A0 (en) 1995-07-11 1995-07-11 High yield precipitation process
AUPN4107 1995-07-11
AUPN4785A AUPN478595A0 (en) 1995-08-14 1995-08-14 High yield precipitation process
AUPN4785 1995-08-14

Publications (1)

Publication Number Publication Date
CA2226842A1 true CA2226842A1 (fr) 1997-01-30

Family

ID=25644991

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002226842A Abandoned CA2226842A1 (fr) 1995-07-11 1996-07-11 Procede par precipitation a rendement eleve

Country Status (5)

Country Link
EP (1) EP0839118A4 (fr)
KR (1) KR19990028922A (fr)
BR (1) BR9609429A (fr)
CA (1) CA2226842A1 (fr)
WO (1) WO1997003022A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101663239A (zh) * 2007-03-27 2010-03-03 美铝澳大利亚有限公司 用于制备氧化铝的方法
AU2018256247B2 (en) * 2017-04-19 2020-11-12 Korea Institute Of Geoscience And Mineral Resources Method for smelting ilmenite using red mud
CN113608506B (zh) * 2021-06-18 2022-10-25 东北大学 一种氧化铝运行指标的智能检测装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486850A (en) * 1967-02-16 1969-12-30 Kaiser Aluminium Chem Corp Flash cooling of liquor during the continuous precipitation of alumina hydrate from bayer process liquor
US4051222A (en) * 1971-09-21 1977-09-27 Alcan Research And Development Limited Coarsening of partially calcined alumina dust
NO135059C (fr) * 1975-04-16 1977-02-02 Norsk Hydro As
US4305913A (en) * 1980-08-06 1981-12-15 Kaiser Aluminum & Chemical Corporation Alumina hydrate production from Bayer liquor by seeding
FR2591581B1 (fr) * 1985-12-17 1990-05-25 Pechiney Aluminium Procede d'obtention avec une forte productivite de trihydroxyde d'aluminium, de haute purete et de diametre median inferieur a 4 micrometres, regle a la demande.
HU201276B (en) * 1988-10-27 1990-10-28 Magyar Aluminium Process for producing alum earth from bauxite containing gibbsite
FR2712275B1 (fr) * 1993-11-09 1995-12-15 Pechiney Aluminium Procédé de traitement de bauxites contenant un mélange de trihydrate d'alumine et de monohydrate d'alumine.

Also Published As

Publication number Publication date
EP0839118A1 (fr) 1998-05-06
EP0839118A4 (fr) 1998-12-09
BR9609429A (pt) 2000-04-25
WO1997003022A1 (fr) 1997-01-30
KR19990028922A (ko) 1999-04-15

Similar Documents

Publication Publication Date Title
US4234559A (en) Process for the manufacture of coarse aluminum hydroxide
AU2005254281B2 (en) Improvement to the Bayer process for the production of alumina trihydrate by means of alkaline leaching of bauxite, said method comprising a predesilicification step
AU619149B2 (en) Process for producing alumina from bauxite
US8298508B2 (en) Recovery of alumina trihydrate during the bayer process using cross-linked polysaccharides
CA1148724A (fr) Methode de production de grains bruts d'hydroxyde d'aluminium
JPS60251125A (ja) バイヤ−法アルミナ水和物の製法
AU660739B2 (en) Process for producing low soda alumina
US6447738B1 (en) Coproducing alumina, iron oxide, and titanium-dioxide from aluminum ore bodies and feedstocks
JPS60215525A (ja) アルミナ中の不純物含有量を減少させる方法
CA2011860C (fr) Procede d'extraction de l'hydroxyde d'aluminium a partir de la bauxite
US9187337B2 (en) Method of increasing the stability of a Bayer process liquor
AU2008232308A1 (en) Method for precipitating boehmite
CA2272322C (fr) Procede pour separer la silice de la bauxite
US4324769A (en) Extraction and production of alumina containing less than 0.03 percent iron oxide
US4614642A (en) Method of producing an aluminium trihydroxide with a large, even particle size
CA2226842A1 (fr) Procede par precipitation a rendement eleve
CN1186258C (zh) 一种生产氧化铝工艺过程的补碱方法
AU697413B2 (en) High yield precipitation process
US5102426A (en) Process for precipitating alumina from bayer process liquor
CA1200075A (fr) Epuration des liqueurs du procede bayer
JPH11322342A (ja) 硫酸第１鉄１水塩の製造法
EP0997435A1 (fr) Procédé de production d'hydroxyde d'alumine à gros grains
US5158577A (en) Process for precipitating alumina from Bayer process liquor
US2021546A (en) Method of producing pure alumina
NO117979B (fr)

Legal Events

Date Code Title Description
FZDE Discontinued