Process for lowering.. sodium in aluminium melts

Details Process for lowering.. sodium in aluminium melts Process for lowering.. sodium in aluminium melts

C - Chemistry, Metallurgy

22

B

39/104, 252/24

C22B 21/06 (2006.01) C22B 9/02 (2006.01)

Patent

CA 1095490

Abstract of the Disclosure The sodium content of aluminium melts is reduced efficiently to with- in acceptable limits by filtering the primary metal from the electrolytic cell through a loosely packed filter bed of granular material which in part com- rises of carbon. The treatment is carried out before alloy additions are made, and the temperature of the melt before entering the filter is higher than 780°C

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