Other

Thyssen Stahl Ag

Usinor Sacilor

Gilles Fellus

Luc Vendeville

Yann Breviere

Francois Mazodier

Olivier Salvado

Michel Abi Karam

Yves Ren&eacute; Leclercq

Georges Mercier

Yves Leclercq

The process is characterized in that, before starting casting, an initialization position is determined for the stopper rod control actuator when the stopper rod is resting on its seat under its own weight and after having filled the tundish equipped with this stopper rod, the actuator is operated to place it in a controlled superclosed position and, to start casting, the actuator is driven according to an imposed movement versus time law, time (t1) for start of casting being determined from this law and the control actuator continues to be driven in opening direction to enable the metal to flow into the ingot mould.

Method for starting continuous metal casting operation

Control process for twin-roll continuous casting, in which, during casting, the roll separation force (RSF) is measured and the position of the bearings of at least one of the rolls is varied in order to increase or decrease the center-to-center spacing of the rolls, with a view to keeping the force substantially constant, a band (.DELTA.RSF) of force values bracketing a desired nominal force (RSF.sub.0) is predetermined and the position of the bearings is varied more sharply when the value of the measured force lies outside the band than when it lies within the band. Application especially to the twin-roll continuous casting of thin steel strip.

Control process for twin-roll continuous casting

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Marines, France

Gilles Fellus