Usinor

The Japan Research and Development Center for Metals

Pascal Gardin

Marcel Garnier

Dominique Viale

Marc Burty

François Stouvenot

Yves Delannoy

Jean-Yves Lamant

Jean-Marie Galpin

Jean-François Domgin

Jacqueline Etay

Raymond Reitz

Frédéric Leclercq

A vacuum treatment of cast metal in liquid form employing the steps of: introducing the cast metal in liquid form into a metallurgic ladle; filling the ladle until a guard height ranging between 0.4 and 0.6 m is reached; and treating the metal while bringing the atmosphere above the ladle under vacuum, and simultaneously stirring the cast metal by injecting helium into the base of the ladle during part of or the whole treatment.

Vacuum treatment of molten metal with simultaneous stirring by helium injection

The invention concerns a method which consists in: simultaneously subjecting the meniscus of the molten metal present in the ingot mould to the action of an axial alternating electromagnetic field tending to provide it with a general dome-like shape and to the action of a transverse direct electromagnetic field designed to attenuate the surface agitation of the meniscus. The implementing installation comprises an ingot mould ( ) with cooled assembled plates ( and ) for casting metal slabs, an alternating current coil ( ) enclosing the ingot mould at the meniscus ( ) of the molten metal to produce an axial magnetic field, collinear with the casting axis ( ), and a direct magnetic field winding passing through the large plates of the ingot mould at the meniscus ( ) perpendicular to the casting axis.

Method for vertical continuous casting of metals using electromagnetic fields and casting installation therefor

Growing community of inventors

Metz, France

Pascal Gardin