EP1685916B1 - Partition plate - Google Patents

Description

The invention relates to a composite cast plate for continuous casting on a beam blank continuous casting for arrangement in the region of the mold.

A composite cast plate is for example from the DE 18 09 997 U1 known.

The DE 195 04 949 U1 describes a method for producing a composite casting of a plurality of metallic matrix materials in a casting mold, in which one or more bodies to be introduced into the mold cavity are provided with a coating on their subsequent contact surfaces before the casting process, one or more melts are cast simultaneously.

To start the Stranggußvorgangs needed in the copper mold a head. This has a certain shape, so that a frictional connection can be made with the cooled liquid steel and the continuous casting begins.

The space between the dummy bar approach head and the mold has hitherto been sealed by means of a refractory cord or other materials. On the one hand, this is time-consuming and, on the other hand, there is the danger of a breakthrough.

The US 5,099,907 A describes a method and arrangement for bonding a new casting strand to a previous strand in continuous continuous casting in a continuous casting plant. For this purpose, a pipe socket-like body is used, which consists of a the Kokillenquerschnitt geometrically similar, but somewhat smaller diameter sleeve-shaped piece of pipe, which is provided approximately in the central region of its longitudinal extent with spacer elements to allow its centering within the mold. If the diameter of the tubular sleeve and timing of its insertion are chosen correctly, the sleeve, since it is not in the hot core of the strand, is not at risk of being melted. The sleeve comes into contact with the outer, cold strand shell, which on further cooling on the Sleeve shrinks, creating a positive connection is generated. However, this device is not suitable for beam blank continuous casting.

In a composite casting - a casting stop with distributor change or steel quality change - you also need a dummy head, which establishes the connection between the last cast, still liquid steel and the newly zuzugießenden steel. The element assuming this function is called a composite cast plate. It is preferably made of steel.

The object of the invention is to provide a composite cast plate, which is suitable for beam blank continuous casting and avoids breakthroughs and the resulting plant downtime.

This object is achieved in that the composite cast plate makes the connection between the last cast, still liquid steel and the new steel to be cast and consists of a sheet-like element with a peripheral seal, both sides of the composite cast plate and substantially perpendicular to this ever at least one Pipe socket is arranged, wherein the pipe socket has a tip on the strand side facing.

The seal prevents the passage of steel between the mold and the tubing strand.

The measure according to the invention makes it possible to carry out composite casting even on a beam blank continuous casting plant, which was hitherto not feasible. However, in other continuous casters, such as slab, billet or billet continuous casting, the composite cast plate according to the invention can also be used.

Through the invention, a continuous casting without casting pause is possible, whereby the plant availability and higher efficiency can be achieved. Also, the reliability is increased.

A development of the invention is that both sides of the composite cast plate and arranged substantially perpendicular to this two pipe sockets.

It is advantageous that the pipe socket each have at least one bore.

Through the pipe socket with the holes, a frictional connection between the composite cast plate and the respective adjacent liquid metal is created.

Finally, it is provided that on the side facing the mold at least one, preferably four cans are arranged.

These cans also serve to increase the adhesion between the composite cast plate and the liquid metal.

Hereinafter, an exemplary embodiment of the invention will be explained with reference to drawings.

Fig. 1

eine erfindungsgemäße Verbundgußplatte in Seitenansicht und

Fig. 2

eine Draufsicht auf eine erfindungsgemäße Verbundgußplatte.

Show it

Fig. 1

a composite cast plate according to the invention in side view and

Fig. 2

a plan view of a composite cast plate according to the invention.

As can be seen from the figures, the composite cast plate consists of a flat element 1, which has a circumferential seal.

On both sides of the composite cast plate 1 and substantially perpendicular to this two pipe sockets 2 are arranged, each having at least one bore 3. The pipe socket 2 on the side facing the strand A has a tip 4. On the side facing the mold B, the composite cast plate 1 four cans 5 on.

Both the pipe socket 2 with the holes 3 and the bushes 5 serve to increase the frictional connection between the composite cast plate 1 and the adjacent liquid metal.

• Nach Ende einer Sequenz wird der im Feuerfestmaterial verschlissene Verteiler aus der Gießposition gefahren. Die Warmstränge werden gestoppt, um die Verbundgußplatte in die Kokille setzen zu können.
• Der Warmstrang wird in der Kokille heruntergefahren. Es wird Kühlschrott eingesetzt.
• Danach wird der neue, vorgchcizte Verteilerwagen über die Kokille gefahren. Er wird mit Flüssigstahl befüllt und bei ausreichendem Verteilerinhalt die Stränge werden neu angegossen.
• Nach Erreichen des Gießspiegels in der Kokille werden die Stränge angefahren.

The composite casting with a composite cast plate 1 according to the invention is characterized by the following steps:

• After the end of a sequence, the distributor worn in the refractory material is moved out of the casting position. The hot strands are stopped in order to put the composite cast plate in the mold.
• The hot strand is shut down in the mold. It is used cooling scrap.
• Then the new, vorgchcizte distribution car is driven over the mold. It is filled with liquid steel and with sufficient distributor contents the strands are newly cast.
• After reaching the pouring mirror in the mold, the strands are started.

By using composite cast plates according to the invention, which prevent the passage of steel between the mold and the hot strand, breakthroughs which cause downtimes can be avoided.

Claims (4)

1. Partition plate which is suitable for continuous casting on a beam blank caster and is disposed in the area of the mould, characterised in that said partition plate forms the connection between the still molten, most recently cast steel and the fresh steel to be cast, and consists of a flat element (1) with a surrounding seal, at least one pipe socket (2) being disposed on each side of and essentially perpendicular to the partition plate (1), said pipe socket (2) on the side A facing the strand being pointed (4).
2. Partition plate according to claim 1, characterised in that two pipe sockets (2) are disposed on each side of and essentially perpendicular to the partition plate (1).
3. Partition plate according to claim 1 or 2, characterised in that the pipe sockets (2) each have at least one hole (3).
4. Partition plate according to claim 1, characterised in that at least one, preferably four sleeves (5) are disposed on the side (B) facing the mould.

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