GB375476A - Improvements in or relating to the extraction and refinement of alumina - Google Patents

Improvements in or relating to the extraction and refinement of alumina

Info

Publication number
GB375476A
GB375476A GB1184231A GB1184231A GB375476A GB 375476 A GB375476 A GB 375476A GB 1184231 A GB1184231 A GB 1184231A GB 1184231 A GB1184231 A GB 1184231A GB 375476 A GB375476 A GB 375476A
Authority
GB
United Kingdom
Prior art keywords
iron
added
alumina
refining
allowed
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
GB1184231A
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.)
Vereinigte Aluminium Werke AG
Original Assignee
Vereinigte Aluminium Werke AG
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 Vereinigte Aluminium Werke AG filed Critical Vereinigte Aluminium Werke AG
Priority to GB1184231A priority Critical patent/GB375476A/en
Publication of GB375476A publication Critical patent/GB375476A/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
    • C01F7/38—Preparation of aluminium oxide by thermal reduction of aluminous minerals

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Thermal Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A process for the production of pure crystalline alumina in which aluminous materials such as bauxite are subjected to a reducing smelting process with sulphur compounds, such as iron sulphide, and coke is characterized in that the liquid slag thus obtained, after being drawn off from the iron alloy, is transferred to a refining furnace wherein it is allowed to cool, say to 1400 DEG C., till crystallization of the alumina takes place. After reheating, say to 1900 DEG C. and allowing to stand, say for ten minutes, refining means, viz. iron pyrites, iron and subsequently coal, are added. After say ten minutes, the refined upper layer is withdrawn, allowed to solidify and washed with acid, if necessary, or treated with water, steam, &c., as in Specification 232,549, [Class 1 (iii), Oxides &c., Metallic]. The sludge formed during this treatment may be dried, briquetted and added to the second refining operation with the necessary sulphur compounds. The waste slag may be added to the original charge, or treated according to the present method separately or admixed with the sludge briquettes.
GB1184231A 1931-04-21 1931-04-21 Improvements in or relating to the extraction and refinement of alumina Expired GB375476A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1184231A GB375476A (en) 1931-04-21 1931-04-21 Improvements in or relating to the extraction and refinement of alumina

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1184231A GB375476A (en) 1931-04-21 1931-04-21 Improvements in or relating to the extraction and refinement of alumina

Publications (1)

Publication Number Publication Date
GB375476A true GB375476A (en) 1932-06-30

Family

ID=9993684

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1184231A Expired GB375476A (en) 1931-04-21 1931-04-21 Improvements in or relating to the extraction and refinement of alumina

Country Status (1)

Country Link
GB (1) GB375476A (en)

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