Melting metal particles and dispersing gas and additives with va

Details Melting metal particles and dispersing gas and additives with va Melting metal particles and dispersing gas and additives with va

1993-01-11

1994-05-10

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

266235, C21C 700

Patent

active

053104129

ABSTRACT:
Metal particles are melted by mixing them with molten metal contained in a bath. A shaft-supported, rotatable impeller is immersed into the molten metal and rotated so as to establish a vortex-like flow of molten metal. Metal particles are deposited onto the surface of the molten metal in the vicinity of the rotating impeller. The particles are submerged substantially immediately after being deposited onto the surface of the molten metal. The impeller includes a thin rectangular prism having sharp-edged corners and vanes that extend upwardly from the prism. The impeller also can be used to disperse gas into the molten metal by pumping the gas through a bore extending the length of the shaft and out of the impeller along the lower surface of the impeller. The gas is sheared into finely divided bubbles as it rises along the sides of the impeller.

REFERENCES:
patent: 5143357 (1992-09-01), Gilbert

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