Recovery of Aluminum from Aluminum-silicon Alloys.
Singleton-EL; De Beauchamp-RL; Sullivan-TA
NTIS: PB 208 006 :12 pages
The extraction of aluminum from aluminum-silicon alloys was investigated as a means of utilizing domestic aluminum silicate ores for aluminum production. Aluminum was extracted from aluminum- silicon alloys by electrolysis in molten electrolytes of nacl-kcl- alcl3 and nacl-kcl-alf3 in a laboratory-scale cell. Six alloys with aluminum contents ranging from 20 to 87 percent aluminum were tested, and aluminum products of primary grade or better were obtained. More than 80 percent of the aluminum was recovered with current efficiencies as high as 91 percent. Recovery of a metallurgical-grade silicon product from the anode residue by an acid leaching procedure was possible with the 50-50 and 65-35 al-si alloys.
IH; Report of Investigation;
NTIS Accession No.
NTIS: PB 208 006