Magnesium reclamation process and apparatus

Details Magnesium reclamation process and apparatus Magnesium reclamation process and apparatus

C - Chemistry, Metallurgy

22

B

18/1116, 18/1122

C22B 1/00 (2006.01) C22B 1/248 (2006.01) C22B 7/00 (2006.01) C22B 26/22 (2006.01)

Patent

CA 1083823

ABSTRACT OF THE DISCLOSURE A magnesium reclamation process whereby magnesium and magnesium alloy fines, chips and scraps may be recovered and re- melted for reuse comprises pelletizing the magnesium by first compacting the magnesium with a low pressure press to initially expel the majority of the air, followed by a high pressure press under a controlled environment to form a compact pellet. The pellets are then melted either by stacking on the cold heel of a pot and heating under a controlled environment or preheating in a basket over a melt, and then subsequently immersing the load. Melting can also be accomplished by controlled melting, utilizing an induction melting furnace wherein temperature can be slowly increased. Pelletizing pressures range from approximately the yield pressure to the cold welding pressure of the material being reclaimed. A typical pelletizing environment is 20% SF6 and 80% CO2 and a suitable melting environment is 98% CO2 and 2% SF6.

263998

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