Method for fluxing molten-metal

Details Method for fluxing molten-metal Method for fluxing molten-metal

1995-10-25

1997-05-20

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75681, C22B 2106

Patent

active

056308639

ABSTRACT:
An improved method for dispersing high levels of fluxing gas in a body of molten aluminum using an impeller or disperser to disperse the fluxing gas in the body of molten aluminum, the method producing increased shear forces in the body of molten aluminum and reducing vortex formation. The method comprises the steps of providing a body of molten aluminum and a disperser in the body. A fluxing gas is added to the body at the rate of 1 to greater than 200 SCF/hour and dispersed by rotating the disperser in one direction and thereafter reversing the direction of rotation to a counter direction. The direction of rotation is reversed periodically to substantially reduce formation of a vortex and to provide increased shear forces in the body for purposes of improving dispersion of the fluxing gas in the molten aluminum.

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