EP0653261B1 - Tundish and nozzle block for the tundish - Google Patents

Abstract

In a tundish for a multi-strand casting installation for casting identical or different steel sections, at least one nozzle block (5) is provided for each strand. In order to achieve simple adjustment to different sections, a nozzle brick (7) of the nozzle block (5) has a rotationally symmetrical circumferential surface (8) which can be inserted into a correspondingly rotationally symmetrical aperture (9) in a perforated brick (6). The outlet opening (10) of the nozzle brick (7) lies eccentrically with respect to the axis (A) of rotation of the rotationally symmetrical circumferential surface (8). <IMAGE>

Description

The invention relates to a distribution vessel for a Multi-strand caster for casting the same or different steel profiles, on each strand at least one outlet block is provided, which consists of a refractory perforated brick and one used in these fireproof nozzle block with an outlet opening. Furthermore, the invention relates to a discharge block for a metallurgical vessel, in particular a distribution vessel.

According to the prior art, distribution vessels are for casting of double-T profiles with a pair of discharge blocks provided, in a corresponding to the double-T profile Distance must be attached. Should be different Double-T profiles must be cast at the same time, then the outlet blocks on the distribution vessel both in their Longitudinal alignment as well as in their transverse alignment be set accordingly, so that according to the status of Technology arranged concentrically on the outlet block Outlet opening of the nozzle block in the center line of the Profile stands. In practice, there would be several Outlet blocks required. Aligning the outlet blocks is cumbersome and time consuming, and delays that Switching the distribution vessel from a profile to a different profile.

The object of the invention is a distribution vessel or a Design the outlet block so that the setting on Different profiles can be carried out quickly and easily is.

According to the invention, the above object is for a distributor vessel of the type mentioned in that the Nozzle stone has a rotationally symmetrical circumferential surface has that in a correspondingly rotationally symmetrical Recess of the perforated brick in different angles of rotation can be used, and that the outlet opening of the nozzle block eccentric to the axis of rotation of the rotationally symmetrical Circumferential surface.

This jar is light and quick on that Cast different profiles. The Cross orientation towards the ideal center line of each pouring profile is done simply by the fact that Nozzle block in a corresponding angular position in the Perforated stone is used. The longitudinal alignment happens in that the perforated brick in a corresponding Sliding position is used in the distribution vessel. This means that the same discharge blocks can be used different profiles, such as different double-T profiles or billet or block profiles at the same time or pour one after the other.

In the perforated block of the outlet block can instead of Insert an immersion nozzle when pouring not open, but closed.

A discharge block according to the invention is characterized by this from that the nozzle stone is a rotationally symmetrical Has circumferential surface, which in a corresponding rotationally symmetrical recess of the perforated brick in different angles of rotation can be used and that the Outflow opening of the nozzle block eccentrically to Rotation axis of the rotationally symmetrical peripheral surface lies.

Advantageous refinements of the invention result from the dependent claims and the following description.

Figur 1

ein Verteilergefäß im Längsschnitt,

Figur 2

eine Draufsicht des Verteilergefässes,

Figur 3

einen Auslaufblock im Schnitt,

Figur 4

eine Draufsicht des Auslaufblocks mit einer ersten Einstellung seines Düsensteins,

Figur 5

ein Auslaufblockpaar in der Einstellung nach Fig.4 am Verteilergefäß,

Figur 6

den Auslaufblock in einer zweiten Einstellung seines Düsensteins,

Figur 7

ein Auslaufblockpaar in der Einstellung nach Fig. 6 am Verteilergefäß,

Figur 8

den Auslaufblock in einer dritten Einstellung seines Düsensteins und

Figur 9

ein Auslaufblockpaar in der Einstellung nach Fig. 8 am Verteilergefäß.

The drawing shows:

Figure 1

a distribution vessel in longitudinal section,

Figure 2

a plan view of the distribution vessel,

Figure 3

an outlet block in the cut,

Figure 4

a plan view of the discharge block with a first adjustment of its nozzle block,

Figure 5

a pair of discharge blocks in the setting according to FIG. 4 on the distribution vessel,

Figure 6

the outlet block in a second setting of its nozzle block,

Figure 7

a pair of discharge blocks in the setting according to FIG. 6 on the distributor vessel,

Figure 8

the outlet block in a third setting of its nozzle block and

Figure 9

a pair of discharge blocks in the setting according to FIG. 8 on the distribution vessel.

FIGS. 5, 7 and 9 are those to be cast in each case Double-T profiles are shown in dashed lines for clarity.

A tundish (1) points for casting three Strands three recesses (2,3,4). In the recesses (2,3,4) is a pair of runout blocks (5) used.

Each outlet block (5) consists of a perforated brick (6) and a nozzle block (7) inserted in this. The perforated stone (6) has a rectangular, preferably square Outer contour on (see. Fig. 4). The nozzle block (7) is with a rotationally symmetrical, especially circular, Provided peripheral surface (8) in a corresponding rotationally symmetrical recess (9) of the perforated brick (6) fits. The peripheral surface (8) and the recess (9) are designed conical (see. Fig. 3).

The nozzle block (7) has an outlet opening (10) provided, which is eccentric to the axis of rotation (A) of the rotationally symmetrical peripheral surface (8). In the A mouthpiece (11) is arranged in the outlet opening (10). At the Nozzle block (7) can also have a replacement outlet opening (10 ') can be provided when the former wear Outlet opening (10) can be put into operation. The replacement outlet opening (10 ') is expediently arranged diametrically to the outlet opening (10).

On the perforated brick (6) in the vicinity of the recess (9) Markers "0", "25", "50" provided the correspond to different profiles to be cast. At the Nozzle stone (7) is formed a mark (12). Will this with the relevant marking of the perforated brick (6) Brought cover, then the perforated brick (6) stands for the respective profile required angle of rotation. The figures 4, 6 and 8 show the nozzle block (7) in the in Example case provided three different ones Angular positions.

4, the outlet opening is located (10) on the center line (M) of the outlet block (5). In the 6 has the outlet opening (10) a distance (a) from the center line (M). In the 8 is the outlet opening (10) in a distance (b) to the center line (M).

The center line (M) of the discharge block (5) is in each case Longitudinal direction of the recesses (2,3,4). The recesses (2,3,4) are each longer than the total length of two Outlet blocks (5) in the direction of the center line (M). Which when installing the outlet blocks (5) in the recesses (2,3 or 4) resulting gaps are with fitting plates (13) filled out. The fitting plates (13) are on the distribution vessel (1) held by support elements (14) from below (see Fig. 1). In the transverse extension, the outlet blocks (5) fit into the Recesses (2, 3 or 4). For the right orientation the outlet blocks (5) in the recesses (2, 3 or 4) appropriate guidance can help be provided or the rectangular perforated brick (6) deviate from the square basic shape.

5, the profile (P1) be poured. Its ideal center line (m1) or the The center line of the associated mold coincides with the Center line (M) of the outlet block (5) together. That's why are two outlet blocks (5) with setting the 4 on the marking "0" used, the nozzle block of the right discharge block is set to the left mark "0" in FIG. 4.

7, the profile (P2) should be poured. Its ideal center line (m2) deviates from the center line (M) of the discharge block (5) around the width (a) from. So that the outlet openings (10) on the ideal Center line (m2), two outlet blocks (5) used, in which the nozzle stones (7) in the 6, the nozzle block the left discharge block at the upper right marking "25" and the nozzle block of the right discharge block at the upper left marking "25" stands.

In the application example according to FIG. 9, a double T profile is intended (P3) can be poured. Its ideal center line (m3) lies around the width (b) next to the center line (M) of the Outlet blocks (5). To ensure that the Outlet openings (10) on the ideal center line (m3) are runout blocks (5) are used here, whose Nozzle stones (7) in the shown in Fig. 8 Angle of rotation are located, the nozzle block of the left Outlet blocks at the upper right marking "50" and the nozzle block of the right outlet block at the upper one left marking "50" stands.

The examples of use according to FIGS. 5, 7, 9 are shown in FIG. 1 and 2 shown in the recesses (2,3 and 4). With the Distribution vessel (1) can thus be three different ones Cast double T profiles. Should be on one or the other Place a different profile of the distribution vessel (1), for example a profile for which an outlet block (5) is enough to be poured, then will be in the appropriate Recess (2, 3 or 4) with only one outlet block (5) corresponding angular position of its nozzle block (7) used. The remaining space is with Fitting plates (13) closed.

As can be seen on the left in FIG. 1, this is Distribution vessel (1) in the area of the outlet blocks (5) and Fitting plates (13) with a continuous lining layer (15).

If worn out nozzle stones after a casting cycle (7) are replaced, then these can be removed from the perforated bricks Remove (6) and replace with new nozzle stones (7). Should after a casting cycle on one or more other profiles are converted, then the outlet blocks (5) and Fitting plates (13) removed and outlet blocks (5) with corresponding nozzle angular position (7) in the recesses (2,3,4) inserted and in these on the suitable distance measure in the direction of the center line (M) longitudinally shifted. The between the relevant recess and the gaps remaining between the perforated bricks (6) closed with fitting plates (13).

Claims (9)

1. Tundish for a multi-strand continuous casting installation for casting the same or different steel profiles, provided on which there is at least one discharge block for each strand which comprises a refractory apertured brick and a refractory nozzle brick with a discharge opening inserted into it, characterised in that the nozzle brick (7) has a rotationally symmetrical peripheral surface (8), which may be inserted into a correspondingly rotationally symmetrical opening (9) in the apertured brick (6) in different angular positions, and that the discharge opening (10) of the nozzle brick (7) is disposed eccentrically with respect to the rotational axis (A) of the rotationally symmetrical peripheral surface (8).
2. Tundish as claimed in Claim 1, characterised in that at least two discharge blocks (5) are inserted into an opening (2, 3, 4) in the tundish (1) and gaps between the edge of the opening (2, 3, 4) and the discharge blocks (5) are filled with refractory material.
3. Tundish as claimed in Claim 2, characterised in that make-up plates (13) constituting the refractory material are inserted into the gaps.
4. Tundish as claimed in one of the preceding claims, characterised in that the tundish (1) has a plurality of openings (2, 3, 4) into which the discharge blocks (5) are inserted.
5. Discharge block for a metallurgical vessel, particularly a tundish, which comprises a refractory apertured brick (6) and a nozzle brick (7) with a discharge opening (10) inserted into it, characterised in that the nozzle brick (7) has a rotationally symmetrical peripheral surface (8), which may be inserted into a correspondingly rotationally symmetrical opening (9) in the apertured brick (6) in different angular positions, and that the discharge opening (10) of the nozzle brick (7) is disposed eccentrically with respect to the rotational axis (A) of the rotationally symmetrical peripheral surface (8).
6. Discharge block as claimed in Claim 5, characterised in that the peripheral surface (8) is of circular conical shape.
7. Discharge block as claimed in Claim 5 or 6, characterised in that the apertured brick (6) is rectangular, particularly square.
8. Discharge block as claimed in one of the preceding claims, characterised in that a reserve discharge opening is provided in the nozzle brick (7).
9. Discharge block as claimed in one of the preceding claims, characterised in that markings are formed on the apertured brick (6) and a mark (12) is provided on the nozzle brick (7).

Images