Molten metal treatment

Details Molten metal treatment Molten metal treatment

1993-07-13

1994-11-15

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75680, 75681, 75684, 75685, 75708, C22B 905, C22B 2106

Patent

active

053644506

ABSTRACT:
There is provided an improved method for dispersing a treatment media in a body of molten metal using an impeller to disperse the media in the body of molten metal, the method producing increased shear forces in the body of molten metal and reducing vortex formation. The method comprises the steps of providing a body of molten metal and an impeller on a shaft in the body. A treatment media is added to the body and dispersed by rotating said impeller in one direction and thereafter reversing the direction of rotation of the impeller to a counter direction. The direction of rotation of the impeller is reversed periodically to substantially reduce formation of a vortex around the shaft of the impeller and to provide increased shear forces in the body for purposes of improving treatment of the molten metal by improved dispersion of the media therein.

REFERENCES:
patent: 3982913 (1976-09-01), Feichtinger
patent: 4784374 (1988-11-01), Pelton

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