Classifications

• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C1/00—Making non-ferrous alloys
  • C22C1/02—Making non-ferrous alloys by melting
  • C22C1/026—Alloys based on aluminium
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
  • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
  • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium

Definitions

• This invention has for its object a process for producing aluminum and aluminum alloys by electrolysis of a molten electrolyte containing aluminum oxide, and refers to such processes in which a raw material containing A1 0 in a crystallized or crystalline state is supplied to the electrolytic bath.
• the extent of the said crust formation is reduced by using amorphous aluminum oxide together with the crystallized or crystalline aluminum oxide.
• the percentage of amorphous aluminum oxide may vary Within very wide limits. A good result is for instance reached by keeping the amorphous oxide 10-40% of the total quantity of aluminum oxide.
• the two kinds of oxide may either be mixed before the charging, or they may be conveyed separately to the electrolytic bath. in the latter case the amorphous oxide should suitably he supplied immediately after the crystallized or crystalline oxide, in order to form a layer of amorphous oxide covering the latter.
• crystallized or crystalline aluminum oxide I mean an aluminum oxide of hi h specific gravity, and in the first place oxi es formed by crystallization out of a melt, such as corun um, produced for instance by the process described in my co-pending U. S.
• amorphous aluminum omde I mean an oxide with a lower s ecific ayity, for instance such'as receive by cacinatlon of hydrate or salts of aluminum.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Mechanical Engineering (AREA)
• Electrolytic Production Of Metals (AREA)
• Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20305961

Family Applications (1)

Country Status (4)

• 1925
  • 1925-05-13 DE DEH101888D patent/DE487584C/de not_active Expired
  • 1925-10-05 GB GB24809/25A patent/GB242958A/en not_active Expired
  • 1925-10-07 FR FR604355D patent/FR604355A/fr not_active Expired
  • 1925-10-19 US US63547A patent/US1772937A/en not_active Expired - Lifetime

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