Method for in-line degassing and filtration of molten metal
AssigneeSwiss Aluminium Ltd.
InventorsJohn C. Yarwood, James E. Dore, Robert K. Preuss
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Abstract
The disclosure teaches an improvement in the degassing and filtration of molten metal, especially aluminum, using an apparatus which employs a pair of sequentially placed, removable filter-type plates and at least one fluxing gas inlet positioned therebetween. Fluxing gas is provided to the melt through the inlet and flows upward through the first of said plates into counter-current contact with the melt. Said plate serves to break up said fluxing gas into a fine dispersion to assure its intimate and extensive contact with the melt. Dissolved gases and non-metallic inclusions are thereby abstracted and removed from the melt.
Claims12
A method for the degassing and filtration of molten metal which comprises passing said molten metal through a chamber wherein said metal travels through at least two sequentially placed, spaced-apart filter-type media and is brought into counter-current contact with a fluxing gas while traveling through the first of said filter-type media, and wherein said fluxing gas issues from an inlet provided within said chamber between the first and second of said filter-type media and percolates through the first of said media to contact said molten metal.
The method of claim 3 wherein said chamber further includes a resilient sealing means in engagement between said mating surfaces, said sealing means resistant to said molten metal.
Dependencies are inferred from the claim text.