Method of filtering molten metal

Details Method of filtering molten metal Method of filtering molten metal

C - Chemistry, Metallurgy

22

B

53/359

C22B 21/06 (2006.01) B01D 39/20 (2006.01) C22B 9/02 (2006.01)

Patent

CA 1223743

A B S T R A C T Removing Inclusions from Molten Metal The invention provides a method of removing inclusions from molten metal, particularly aluminium, by a) contacting the molten metal with a medium which retains metal-non-wettable inclusions. The medium may be liquid such as a fused salt mixture; or solid such as a filter of metal-non-wettable ceramic materials or a bed of granules e.g. of tabular alumina, b) passing the molten metal through a filter of metal-wettable material, e.g. a refractory hard metal such as titanium diboride. The metal-wettable filter attracts and holds metal wettable inclusions within itself, and may also prevent by surface tension the entry of fused salt droplets.

461029

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