Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan

Ernst Bachner

Thorwald Fastner

Wilhelm Dutzler

Max Mayrhofer

Alois Niedermayr

Fritz Granitz

Josef Peitl

Heinz Muller

Herbert Bumberger

Gerhard Reithner

Walter Fortner

A process and an apparatus for continuously casting strands of unkilled or semi-killed steel having a product of [%C] .times. [%O] that is less than 0.002, preferably less than 0.0015 due to deoxidizing prior to casting, a carbon content of between 0.02 and 0.20%, an Al content not exceeding 0.01% and a Si content not exceeding 0.05%, wherein the steel is cast from a tundish through a casting tube that is immersed in the mould and flush gas is introduced into the casting tube and moved on together with the steel which leaves said casting tube via two lateral, upwardly inclined openings. The ascending gas bubbles are deflected by means of a guiding plate and move through a gap formed between said guiding plate and the walls of said mould, flushing out CO-bubbles forming at the front of solidification and thus providing for an edge zone that is free from blow-holes.

Process and apparatus for continuously casting strands of unkilled or

A continuous casting plant for slabs, comprising a water-cooled mould from which the strand is continuously extracted, a supporting and guiding means having rollers for guiding the strand between them, and a cooling device having nozzles for spraying a coolant, in particular water, onto the strand and the rollers, has a part of the cooling device formed by flat jet nozzles arranged parallel to the surface of the strand. The longitudinal axes of the nozzles are parallel to the axes of the rollers, and two flat jet nozzles are arranged between neighboring rollers. Advantageously, the flat jet nozzles are arranged within the area defined by the slab edges of the slab sizes to be cast in the plant, and advantageously they are arranged opposite and toward each other. Furthermore, the flat jet nozzles can have nozzle openings in opposite directions, each opening pointing toward the slab edges. Advantageously, the flat jet nozzles are displaceable in the direction of the roller axes and are thus adjustable to various slab widths.

Continuous casting plant for slabs

The present invention relates to a continuous steel casting method for a casting capacity of more than 1.5 metric tons of steel per minute. In this method a vertically arranged, substantially rectangular mold is used, into which at least one steel stream containing inert gas is passed through a casting tube below the surface of the casting level in the mold. The casting tube is provided with lateral downwardly inclined outlet openings, whose axes lie in a vertical plane running through the larger transverse axis of the mold. The axes of the lateral outlet openings run at an angle which depends upon the perpendicular distance of the axes from the narrow side of the mold. The inert gas is supplied in an amount of 1 to 15 Ncm.sup.3 /kg steel, preferably 3 to 8 Ncm.sup.3 /kg steel, to the steel stream over its entire cross section at the place of origin above the mold. The invention is of particular advantage for slabs wider than 800 mm of aluminum-containing steel.

Continuous steel casting method

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Linz, undefined

Ernst Bachner