Carbothermic production of aluminum
Abstract
Abstract A PROCESS FOR PREPARING AN ACCURATELY CONTROLLED FEED, HAVING A 2:1 RATIO OF ALUMINUM:CARBON MONOXIDE AND A 1:1 ATOMIC RATIO OF CARBON:OXYGEN, FOR A CARBOTHERMIC PROCESS WHEREIN THE FEED, CONSISTING ESSENTIALLY OF ALUMINUM MONOXYCARBIDE, IS INTRODUCED INTO A HEATING ZONE AND MAINTAINED THEREIN AT AN ELEVATED TEMPERATURE SUFFICIENT TO QUICKLY VAPORIZE ALL PRODUCTS TO A VAPOROUS MIXTURE OF ESSENTIALLY ONLY GASEOUS ALUMINUM AND CARBON MONOXIDE. THE VAPOROUS MIXTURE IS THEN CONTACTED IN THE ABSENCE OF A REACTIVE ENVIRONMENT WITH A LAYER OF LIQUID ALUMINUM AT A TEMPERATURE SUFFICIENTLY LOW THAT THE VAPOR PRESSURE OF THE LIQUID ALUMINUM IS LESS THAN THE PARTIAL PRESSURE OF THE ALUMINUM VAPOR IN CONTACT WITH IT AND SUFFICIENTLY HIGH TO PREVENT THE REACTION OF CARBON MONOXIDE AND ALUMINUM, AND FINALLY, THE SUBSTANTIALLY PURE ALUMINUM IS RECOVERED.
Inventors
- 👤 R Kibby
Bibliographic Details
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