Grain refining

Details Grain refining Grain refining

1987-08-25

1988-12-27

Brody, Christopher W.

Alloys or metallic compositions

Processes

75 1019, C22C 100

Patent

active

047939710

ABSTRACT:
A method for introducing grain refiners into molten media, such as molten aluminum, utilizes a chamber having a discharge immersed in the molten media and having a plasma therein extending from the molten media at the chamber discharge to a site above the discharge. Grain refiner is provided to said site and converted into a superheated spray for introduction into the media. An alternate embodiment includes supplying one or more constituents of a grain refiner compound to the plasma for reaction to form the grain refiner. A gas exits the chamber and enhances introduction into the media.

REFERENCES:
patent: 3137753 (1964-06-01), Feichtinger
patent: 3268326 (1966-08-01), Harders
patent: 3340020 (1967-09-01), Nevenschwarder et al.
patent: 3729309 (1973-04-01), Kawawa
patent: 3768999 (1973-10-01), Ohkubo et al.
patent: 3858640 (1975-01-01), Sifferlen
patent: 3947265 (1976-03-01), Guzowski et al.
patent: 4688771 (1987-08-01), Eckert et al.
patent: 4689199 (1987-08-01), Eckert et al.

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