GB939617A - Improvements in or relating to the extraction of aluminium - Google Patents

Improvements in or relating to the extraction of aluminium

Info

Publication number
GB939617A
GB939617A GB28249/61A GB2824961A GB939617A GB 939617 A GB939617 A GB 939617A GB 28249/61 A GB28249/61 A GB 28249/61A GB 2824961 A GB2824961 A GB 2824961A GB 939617 A GB939617 A GB 939617A
Authority
GB
United Kingdom
Prior art keywords
natrolite
heat exchangers
ore
bauxite
autoclave
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.)
Expired
Application number
GB28249/61A
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.)
ALMASFUEZITOEI TIMFOELDGYAR
Almasfuzitoi Timfoldgyar
Original Assignee
ALMASFUEZITOEI TIMFOELDGYAR
Almasfuzitoi Timfoldgyar
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 ALMASFUEZITOEI TIMFOELDGYAR, Almasfuzitoi Timfoldgyar filed Critical ALMASFUEZITOEI TIMFOELDGYAR
Publication of GB939617A publication Critical patent/GB939617A/en
Expired 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
    • 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
    • C01F7/0666—Process control or regulation

Abstract

A slurry of alumina containing ore, e.g., bauxite, and caustic soda solution is preheated to 90 DEG -190 DEG C. whilst flowing at more than 0,7 m./sec. before digesting in autoclaves at a higher temperature. The preheating is occasioned by single or multi-pass heat exchangers preferably of the 'stacked tube' type. Unwanted primary natrolite is removed from the initial ore prior to the preheating stage by stirring a slurry of the ore in vats for 6-10 hours at 70 DEG -100 DEG C. when the natrolite is precipitated. Secondary natrolite may be removed similarly at temperatures above 120 DEG C. in vats placed between the heat exchangers or between the final heat exchanger and the first autoclave. In Example 1, bauxite was mixed with a thick caustic dye, stirred for about 10 hours at 95 DEG -100 DEG C., passed through 9 fourpass tube heat exchangers at 1,5 m./sec. after which its temperature was 190 DEG C., and finally led into an autoclave where it was heated to 210 DEG C. for about 1 hour.
GB28249/61A 1960-11-14 1961-08-03 Improvements in or relating to the extraction of aluminium Expired GB939617A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUAT000547 1960-11-14

Publications (1)

Publication Number Publication Date
GB939617A true GB939617A (en) 1963-10-16

Family

ID=10993164

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28249/61A Expired GB939617A (en) 1960-11-14 1961-08-03 Improvements in or relating to the extraction of aluminium

Country Status (2)

Country Link
DE (1) DE1202258B (en)
GB (1) GB939617A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175580A (en) * 1985-05-29 1986-12-03 Pechiney Aluminium Process for the continuous production of alumina from bauxites containing monohydrates using the bayer process
US6903040B2 (en) 2001-05-10 2005-06-07 Akzo Nobel Nv Continuous process and apparatus for the efficient conversion of inorganic solid particles
CN111302309A (en) * 2020-01-20 2020-06-19 泰安渤洋化工科技有限公司 Process device and method for continuous crystal form passivation and modification of hydrotalcite product

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1039574C (en) * 1993-07-07 1998-08-26 凯泽工程师有限公司 Multi-cell heating system
FR2834979B1 (en) * 2002-01-21 2004-02-20 Pechiney Aluminium SOLUBILIZATION OF CARBONATES BY RECYCLING CONDENSATES DURING THE PRESSURE ATTACK OF MONOHYDRATE BAUXITES
CN1320962C (en) * 2002-12-02 2007-06-13 阿尔伯麦尔荷兰有限公司 Process for conversion and size reduction of solid particles
WO2004050251A1 (en) * 2002-12-02 2004-06-17 Albemarle Netherlands B.V. Process for conversion and size reduction of solid particles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT151802B (en) * 1936-03-28 1937-12-10 Wolf Johannes Dr Mueller Process for preventing deposits in recooling and heating sections in the continuous digestion process of bauxite with lye.
DE830945C (en) * 1950-06-03 1952-02-07 Dr Rudolf Wittig Process for the continuous digestion of bauxite
DE938126C (en) * 1953-06-01 1956-01-26 Vaw Ver Aluminium Werke Ag Process for the digestion of bauxites with caustic soda

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175580A (en) * 1985-05-29 1986-12-03 Pechiney Aluminium Process for the continuous production of alumina from bauxites containing monohydrates using the bayer process
GB2175580B (en) * 1985-05-29 1989-07-05 Pechiney Aluminium Process for the continuous production of alumina from bauxites containing monohydrates using the bayer process
US6903040B2 (en) 2001-05-10 2005-06-07 Akzo Nobel Nv Continuous process and apparatus for the efficient conversion of inorganic solid particles
CN111302309A (en) * 2020-01-20 2020-06-19 泰安渤洋化工科技有限公司 Process device and method for continuous crystal form passivation and modification of hydrotalcite product
CN111302309B (en) * 2020-01-20 2023-05-23 泰安渤洋化工科技有限公司 Process device and method for continuous crystal form passivation and modification of hydrotalcite-like products

Also Published As

Publication number Publication date
DE1202258B (en) 1965-10-07

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