Apparatus and method for removal of alkali and alkaline...

Details Apparatus and method for removal of alkali and alkaline... Apparatus and method for removal of alkali and alkaline...

C - Chemistry, Metallurgy

22

B

53/246

C22B 21/06 (2006.01)

Patent

CA 1127852

ABSTRACT For the removal of alkali metal and Alkaline earth metal containing molten aluminium (Including Mg-free aluminium alloys), is passed through an active bed of particles of material containing aluminium fluoride, maintained con- tinuously immersed in molten aluminium. Alkali metal and alkaline earth metal contaminants react and may release insoluble molten reaction products. In order to avoid plugging of the active bed and achieve removal of molten reaction products the molten metal is preferably passed upwardly successively through an inactive filter layer, an active bed layer and a further inactive filter layer.

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