BR0315592A - Processo de ataque da bauxita que melhora a filtrabilidade das lamas na saìda do ataque - Google Patents

Processo de ataque da bauxita que melhora a filtrabilidade das lamas na saìda do ataque

Info

Publication number
BR0315592A
BR0315592A BR0315592-7A BR0315592A BR0315592A BR 0315592 A BR0315592 A BR 0315592A BR 0315592 A BR0315592 A BR 0315592A BR 0315592 A BR0315592 A BR 0315592A
Authority
BR
Brazil
Prior art keywords
attack
bauxite
temperature
exit
alkaline solution
Prior art date
Application number
BR0315592-7A
Other languages
English (en)
Other versions
BR0315592B1 (pt
Inventor
Nicolas Mugnier
Patrick Leizour
Original Assignee
Pechiney 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 Pechiney Aluminium filed Critical Pechiney Aluminium
Publication of BR0315592A publication Critical patent/BR0315592A/pt
Publication of BR0315592B1 publication Critical patent/BR0315592B1/pt

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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Nutrition Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Filtration Of Liquid (AREA)
  • Fats And Perfumes (AREA)
  • Saccharide Compounds (AREA)
  • Looms (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

"PROCESSO DE ATAQUE DA BAUXITA QUE MELHORA A FILTRABILIDADE DAS LAMAS NA SAìDA DO ATAQUE". A presente invenção refere-se a um processo de tratamento da bauxita (10) por ataque alcalino, tipicamente de acordo com o processo Bayer, que permite obter hidrato de alumina caracterizado pelo fato de que introduz-se a bauxita triturada (11, 15) diretamente em uma solução alcalina (21a) retirada e destinada a ser reintroduzida no circuito Bayer do licor de aluminato (20), a dita solução alcalina (21a) sendo levada a uma temperatura tal que, depois de colocação em contato da dita bauxita triturada (11, 15) e da dita solução alcalina, a temperatura da suspensão que resulta dessa mistura é superior a uma temperatura próxima da temperatura de ebulição na pressão atmosférica, quer dizer tipicamente superior a 95<198>C e, de preferência, superior ou igual à temperatura de ebulição na pressão atmosférica.
BRPI0315592-7A 2002-10-25 2003-10-21 processo de tratamento da bauxita por ataque alcalino. BR0315592B1 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0213408A FR2846319B1 (fr) 2002-10-25 2002-10-25 Procede d'attaque de la bauxite ameliorant la filtrabilite des boues en sortie d'attaque
PCT/FR2003/003104 WO2004039729A1 (fr) 2002-10-25 2003-10-21 Procede d'attaque de la bauxite ameliorant la filtrabilite des boues en sortie d'attaque

Publications (2)

Publication Number Publication Date
BR0315592A true BR0315592A (pt) 2005-09-06
BR0315592B1 BR0315592B1 (pt) 2011-11-16

Family

ID=32088297

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0315592-7A BR0315592B1 (pt) 2002-10-25 2003-10-21 processo de tratamento da bauxita por ataque alcalino.

Country Status (13)

Country Link
US (1) US7658896B2 (pt)
EP (1) EP1558525B1 (pt)
CN (1) CN1319861C (pt)
AT (1) ATE360600T1 (pt)
AU (1) AU2003285414B2 (pt)
BR (1) BR0315592B1 (pt)
DE (1) DE60313482D1 (pt)
ES (1) ES2285217T3 (pt)
FR (1) FR2846319B1 (pt)
OA (1) OA12953A (pt)
RU (1) RU2328446C2 (pt)
UA (1) UA79513C2 (pt)
WO (1) WO2004039729A1 (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU697381B2 (en) * 1994-06-07 1998-10-01 Hatch Pty Ltd Improved multi-cell heating system
FR2934852B1 (fr) * 2008-08-06 2011-06-24 Alcan Int Ltd Perfectionnement au procede bayer de production de trihydrate d'alumine, ledit procede comprenant une etape dans laquelle la liqueur sursaturee est filtree a haute temperature avant decomposition
WO2012003578A1 (en) * 2010-07-09 2012-01-12 Rio Tinto Alcan International Limited Flocculent addition and mixing rate for separating a slurry
CN102580362B (zh) * 2011-01-14 2014-05-28 北京化工大学 化学絮凝法分离硝酸磷肥生产中酸不溶物的工艺流程
EP2886178A1 (en) * 2013-12-20 2015-06-24 Rio Tinto Alcan International Limited Process and installation for producing alumina trihydrate by alkaline digestion of bauxite ore

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4446117A (en) * 1983-04-04 1984-05-01 Alumina Development Corporation Double digestion system to reduce formation of ferrous iron
US4511542A (en) * 1984-05-24 1985-04-16 Kaiser Aluminum & Chemical Corporation Bayer process production of alumina hydrate
CN1037493A (zh) * 1988-05-11 1989-11-29 建筑工程公司 氧化铝生产过程中沉积红泥的除害方法
GB8906500D0 (en) * 1989-03-21 1989-05-04 Shell Int Research Process for the production of aluminium hydroxide from bauxite
ES2042219T3 (es) * 1989-10-13 1993-12-01 Alcan International Limited Procedimiento y aparato para la decantacion de suspensiones.
US5545384A (en) * 1991-10-30 1996-08-13 Sumitomo Chemical Co., Ltd. Process for production of aluminum hydroxide from ore containing alumina
FR2732332B1 (fr) * 1995-03-31 1997-05-09 Pechiney Aluminium Procede de traitement de bauxite a trihydrate d'alumine a basse teneur en silice reactive
CN1049874C (zh) * 1996-06-28 2000-03-01 中国长城铝业公司 一种铝土矿浆预脱硅工艺方法
FR2758544B1 (fr) * 1997-01-22 1999-02-26 Pechiney Aluminium Procede ameliore de traitement de bauxites riches en monohydrate d'alumine
FR2771081B1 (fr) * 1997-11-17 1999-12-17 Pechiney Aluminium Production de trihydrate d'alumine avec controle separe de la teneur en sodium et de la granulometrie
US6086771A (en) * 1997-12-12 2000-07-11 Nalco Chemical Company Water continuous emulsion polymers for improving scale control in the bayer process
AUPP370498A0 (en) * 1998-05-25 1998-06-18 Nalco Chemical Company Dextran, starch and flocculant combination for improving red mud clarification
US6086834A (en) * 1998-06-19 2000-07-11 Alcan International Limited Process for the removal of silica from an alkaline solution containing sodium aluminate
US6528028B2 (en) * 1999-12-28 2003-03-04 Showa Denko K.K. Process for treating bauxite in which a desilication product and an insoluble residure are separately precipitated
FR2834979B1 (fr) * 2002-01-21 2004-02-20 Pechiney Aluminium Solubilisation des carbonates par recyclage des condensats lors de l'attaque sous pression des bauxites a monohydrates

Also Published As

Publication number Publication date
US20060051268A1 (en) 2006-03-09
ATE360600T1 (de) 2007-05-15
EP1558525B1 (fr) 2007-04-25
CN1708457A (zh) 2005-12-14
BR0315592B1 (pt) 2011-11-16
WO2004039729A1 (fr) 2004-05-13
EP1558525A1 (fr) 2005-08-03
DE60313482D1 (de) 2007-06-06
OA12953A (fr) 2006-10-13
AU2003285414B2 (en) 2007-12-20
ES2285217T3 (es) 2007-11-16
US7658896B2 (en) 2010-02-09
AU2003285414A1 (en) 2004-05-25
CN1319861C (zh) 2007-06-06
FR2846319B1 (fr) 2004-12-10
FR2846319A1 (fr) 2004-04-30
UA79513C2 (en) 2007-06-25
RU2328446C2 (ru) 2008-07-10
RU2005115860A (ru) 2006-01-20

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Legal Events

Date Code Title Description
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 21/10/2003, OBSERVADAS AS CONDICOES LEGAIS.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE A 11A ANUIDADE.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2276 DE 19-08-2014 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.