BR9707543A - Bauxite treatment - Google Patents

Bauxite treatment

Info

Publication number
BR9707543A
BR9707543A BR9707543-4A BR9707543A BR9707543A BR 9707543 A BR9707543 A BR 9707543A BR 9707543 A BR9707543 A BR 9707543A BR 9707543 A BR9707543 A BR 9707543A
Authority
BR
Brazil
Prior art keywords
bauxite
assimilation
solution
treatment
silica
Prior art date
Application number
BR9707543-4A
Other languages
Portuguese (pt)
Inventor
Tony Picaro
Paul Gerard Mc-Cormick
Original Assignee
Queensland Alumina Limited
Univ Western Australia
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 Queensland Alumina Limited, Univ Western Australia filed Critical Queensland Alumina Limited
Publication of BR9707543A publication Critical patent/BR9707543A/en

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
    • C01F7/0613—Pretreatment of the minerals, e.g. grinding

Abstract

Patente de Invenção: <B>"TRATAMENTO DE BAUXITA"<D>. Antes da assimilação da bauxita (que contém sílica) em uma solução de assimilação tal como soda cáustica para a produção de óxido de alumínio, a bauxita é ativada mecanicamente para induzir uma reação mecanoquímica na presença de um reagente tal como cal. Pelo menos uma parte da sílica é mantida insolúvel e não reativa na formação de um produto de dessilificação de silicato-sódio-alumínio (DSP) durante a subseq³ente assimilação da bauxita na solução de assimilação.Invention Patent: <B> "BAUXITE TREATMENT" <D>. Before assimilation of bauxite (which contains silica) in an assimilation solution such as caustic soda for the production of aluminum oxide, bauxite is mechanically activated to induce a mechanochemical reaction in the presence of a reagent such as lime. At least part of the silica is kept insoluble and non-reactive in the formation of a sodium silicate aluminum desilification product (DSP) during the subsequent assimilation of bauxite into the assimilation solution.

BR9707543-4A 1996-02-15 1997-02-11 Bauxite treatment BR9707543A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN8082A AUPN808296A0 (en) 1996-02-15 1996-02-15 Bauxite treatment
PCT/AU1997/000074 WO1997029993A1 (en) 1996-02-15 1997-02-11 Bauxite treatment

Publications (1)

Publication Number Publication Date
BR9707543A true BR9707543A (en) 2000-01-04

Family

ID=3792397

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9707543-4A BR9707543A (en) 1996-02-15 1997-02-11 Bauxite treatment

Country Status (4)

Country Link
EP (1) EP0880468A4 (en)
AU (1) AUPN808296A0 (en)
BR (1) BR9707543A (en)
WO (1) WO1997029993A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2606821C1 (en) * 2015-09-03 2017-01-10 Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" Method of processing nepheline ore
RU2688083C1 (en) * 2018-05-16 2019-05-17 Федеральное государственное бюджетное учреждение науки Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (ИМЕТ РАН) Method of nepheline concentrate desiliconization and device for its implementation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357792A (en) * 1966-10-03 1967-12-12 Gebefugi Istvan Kneading pretreatment for the production of aluminum hydroxide
AU558556B2 (en) * 1981-09-10 1987-02-05 Comalco Limited Alumina production
DE4036448A1 (en) * 1989-11-16 1991-05-23 Franz Prof Dr Ing Pawlek Bauxite digestion in ball mill - for simultaneous fine grinding, leaching and silica removal
FR2728556B1 (en) * 1994-12-22 1997-01-31 Pechiney Aluminium PROCESS FOR THE REMOVAL OF IRON FROM SODIUM ALUMINATE LIQUORS DERIVED FROM ALKALINE BAUXITE ALOHYDRATE ATTACK

Also Published As

Publication number Publication date
EP0880468A1 (en) 1998-12-02
AUPN808296A0 (en) 1996-03-07
WO1997029993A1 (en) 1997-08-21
EP0880468A4 (en) 1999-05-12

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Legal Events

Date Code Title Description
EG Technical examination (opinion): publication of technical examination (opinion)
B09B Patent application refused [chapter 9.2 patent gazette]