Asea Aktiebolag

Asea Ab

Yngve Sundberg

Sten Kollberg

Jan Marchner

Apparatus for heating intermediate ladles or tundishes, for example, in continuous casting processes. The apparatus comprises at least one coil having an iron core, which is disposed adjacent the ladle or tundish. The ladle or tundish and the coils are arranged so as to be movable with respect to each other. The ladle or tundish is adapted to be placed in a heating position adjacent to the coil, which is thus closely connected with the bottom or lower parts or corners of the ladle or tundish, in order primarily to heat the lowermost parts of the melt stored in the tundish.

Heating apparatus for intermediate ladles or tundishes

A method for centrifugal casting involves mold rotation below the mean rotation speed during the casting and thereafter periodically varying the mold rotating speed so as to cause stirring throughout the wall thickness of the melt centrifugally held in the mold. This avoids the formation of snakes and blisters in the cast shape.

Method for centrifugal casting

A melt is continuously horizontally cast by causing the melt to flow forwardly while spreading laterally to form a flat product. A magnetic field is directed perpendicularly through the flow where it is thicker so as to form the product with a uniform thickness throughout its width.

Horizontal continuous casting of metals

Ferrous pellets are melted by feeding them to a ferrous melt in the hearth of an electric arc furnace having a centrally positioned arc. The melt is inductively stirred so that the lower portion of the melt flows radially outwardly while its upper portion flows radially inwardly towards the arc so that the pellets and possibly slag are carried towards the arc.

Apparatus and method for melting ferrous pellets

Molten steel contained in a solidified steel skin of a continuously cast steel strand, is inductively stirred by inductive stirrers supplied with multi-phase AC having a frequency of from about 2 Hz to about 3 Hz, thereby obtaining an increased field strength or flux density in the molten steel and reducing the currents induced wastefully in the skin of solidified steel.

Growing community of inventors

Vaster.ang.s, Sweden

Yngve Sundberg