Aluminum production

• US 3,251,676 A
• Filed: 08/16/1962
• Issued: 05/17/1966
• Est. Priority Date: 08/16/1962
• Status: Expired due to Term

• Current Assignee: Arthur F. Johnson
• Original Assignee: Arthur F. Johnson
• Inventors: Johnson, Arthur F.
• Application Number:
  US04/217,448
• Time in Patent Office: 1,370 Days
• US Class Current: 75/10.27
• CPC Class Codes: C22B 21/0061 using metals, e.g. Hg or Mn
• CPC Class Codes: C22B 21/02 with reducing C22B21/04 takes precedence
• CPC Class Codes: Y10S 266/905 Refractory metal-extracting means

Claims

1. THE IMPROVED PROCESS FOR THE PRODUCTION OF ALUMINUM WHICH COMPRISES CHARGING INTO AN ELECTRIC ARC REDUCTION FURNACE A MIXTURE OF OXIDIC ALUMINUM AND CARBONACEOUS REDUCING AGENT, PROVIDING IN THE REDUCTION FURNACE A HEAVY METAL ALLOY OF ALUMINUM AND A METAL OF THE GROUP CONSISTING OF IRON, SILICON, MOLYBDENUM, CHROMIUM, VANADIUM, TITANIUM, COBALT, TUNGSTEN AND ZIRCONIUM, FUSING THE OXIDIC MATERIAL AND FLOATING IT OVER THE HEAVY METAL ALLOY, REDUCING ALUMINUM FROM THE FUSION INTO THE HEAVY METAL ALLOY, FLOWING THE HEAVY METAL ALLOY INTO ANOTHER FURNACE WHICH IS UNDER A VACCUM AND AT A LOWER TEMPERATURE THAN THE REDUCTION FURNACE, VAPORIZING ALUMINUM FROM THE HEAVY METAL ALLOY AND RETURNING THE HEAVY METAL ALLOY THUS DEPLETED IN ALUMINUM TO THE REDUCTION FURNACE, AND CONDENSING THE ALUMINUM VAPOR.