Continuous casting of metal using electromagnetic stirring

Metal founding – Process – Shaping a forming surface

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164 66, 164 82, 164147, 164281R, B22D 2702, B22D 1110

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active

040420078

ABSTRACT:
In continuous casting of metal in an open-ended mold through which the metal is advanced in a first direction while undergoing peripheral solidification, and to which molten metal is supplied by a shroud that opens beneath the metal level, use of a shroud having an axial nozzle and terminating in a well beyond the nozzle, with lateral discharge ports between the well and the nozzle oriented to discharge the supplied metal at an obtuse angle to the first direction, assists in reducing the incidence of entrapped inclusions. Injection of inert gas into the flow of molten metal within the shroud promotes transport of inclusions in the second direction within the mold. The shroud and/or inert gas injection may be employed in combination with the provision of electromagnetically produced metal circulation in the mold causing flow of molten metal, in a second direction opposite to the first direction, along the solid-liquid interface within the mold for preventing entrapment of inclusions at the interface.

REFERENCES:
patent: 3517726 (1970-06-01), Mills et al.
patent: 3608621 (1971-09-01), Bollig et al.
patent: 3693697 (1972-09-01), Tzauaras
patent: 3703924 (1972-11-01), Whisler et al.
patent: 3804147 (1974-04-01), Babel et al.
patent: 3811490 (1974-05-01), Middleton et al.
patent: 3886992 (1975-06-01), Maas et al.

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