DE2027881B2 - Device for renewing the steel supply from the intermediate container to the mold of a continuous caster - Google Patents

Description

The invention relates to a device for renewing the steel supply from the intermediate container to Mold of a continuous caster while maintaining a constant cast supply in the intermediate container and during a temporary interruption of the intermediate container outflow, this with a slide valve and a pouring pipe is provided.

In the case of steel continuous casting plants, the pouring stream is usually carried from the intermediate container into the mold Pouring pipes made of refractory material protected against oxidation. Such pouring pipes are in the due to erosion Muzzle area and in the bore exposed to heavy wear when immersed in the melt Erosion also occurs on this pouring pipe in the contact area with the bath level. These erosions often lead to the breaking off of the pouring pipes at the weakened points, causing it to be harmful Impurities are washed in in the sump and the steel oxidizes when the pouring pipe breaks In addition, a disadvantageous flow can become effective, especially in arch systems Eroding the strand shell increases the risk of breakthrough

In the case of the known intermediate containers with permanently walled-in pouring pipes, the removal of a worn pouring pipe and the walling in of a new pouring pipe only outside of the pouring position and take place when the intermediate container is empty. In the case of sequential castings, the entire intermediate container must therefore often be used can be replaced on the fly, although the brick lining usually has a significantly longer service life and only parts of the locking device and / or the steel feed are worn.

It is known to use slide closures on intermediate containers instead of stopper closures. However, the service life of the slide closures, in particular the slide plates, is shorter than that of the other} refractory parts of the intermediate vessel.

It is also a pouring vessel with a slide lock and an adjoining pouring tube known The slide plates are slidably mounted in open guides and can be used one after the other if necessary be pushed in front of the outlet opening of the casting vessel. With advanced pouring tube wear or as a preventive measure to avoid casting breaks caused by the pouring pipe, is also with this one Device a on-the-fly change of the pouring vessel

is necessary.

The invention has for its object to provide a device that the casting longer Sequences enables and the time-consuming and costly replacement of the entire intermediate container avoids due to wear on the supply from the intermediate container to the mold

To solve this problem, according to the invention suggested that at least two, each from a slide plate and one of the slide plate downstream pouring pipe existing units can be accommodated in guides arranged on the intermediate container are and successively in front of the outflow opening of the intermediate container provided with a fitting plate are orable.

In a further embodiment of the invention, the slide plate can be directly followed by a control plate be.

It can be an advantage if the control plate is equipped with The control plate can be provided in one on the slide plate Guide are included, with the common edging of the control plate and pouring tube with the Piston rod of a Dnjckmitteizyiiinders articulated on an intermediate piece.

According to an additional embodiment of the invention, the sliding cylinder assigned to the slide plate be attached to the intermediate container trolley. The one received in the guide of the intermediate container The slide can be connected to the piston of a pressure medium cylinder arranged on the intermediate container trolley be.

The slide plates that follow one another closely during the change process are only used for interruption the drainage of the intermediate container during the changing process and when filling at the beginning of the casting. Here there is only slight wear. The actual flow control takes place between the slide plate and the rule plate. These parts, which are subject to greater wear and tear, are replaceable.

An exemplary embodiment of the invention is shown in the drawing. It shows

F i g. 1 shows a cross section through an intermediate container with exchangeable slides and pouring pipes,
F i g. 2 shows a partial longitudinal section of FIG. 1.

In both figures, an intermediate container 2 placed on a casting carriage 1 is in the casting position above a mold 3 is shown. An outlet stone 4 is located in a bottom opening of the intermediate container 2 used. Holders 5 are screwed to the intermediate container 2 on both sides of the outlet block 4. Between the brackets 5, a fitting plate 6 is received below the outlet block 4. To the Brackets 5 guide strips 7 are attached. the

Guide strips 7 hold a slide plate 8 in their upper part and one in their lower part Enclosure 9 for a control plate 10 and a pouring pipe 11. Mating plate 6, slide plate 8 and control plate 10 are provided with through openings. The slide plate 8 is connected to the piston rod 13 via an intermediate piece 12 a pressure medium cylinder 14 articulated on the intermediate container vehicle 1. At the intermediate piece 12 is a regulating cylinder 15 is arranged, the piston rod 16 of which is connected to the casing 9

Between the guide strips 7 is another one made of slide plate 8, surround 9, control plate 10 and Casting pipe 11 included existing unit, which is also provided by a pressure cylinder 14

This unit can be moved by sliding in the guide strips 7 against the in the casting position The unit that is located must be replaced if it is worn out. The worn unit is then replaced taken out and pushed a new unit into the guide.

The slide plates 8 only serve to complete the intermediate container or the full one To release passage. To regulate the inflow rate, the one connected to the pouring pipe 11 is used Regeiplatte 10 provided. Since this between the slide plate 8 and the control plate 10 is a stronger Wear occurs, these parts can be briefly exchanged together with the pouring pipe.

1 sheet of drawings

Claims (5)

Patent claims: 1. Device for renewing the steel supply from the intermediate container to the mold of a continuous caster while maintaining a constant casting supply in the intermediate container and during a temporary interruption of the intermediate container outflow, this with a slide lock and a pouring pipe is provided, characterized in that at least two of each a slide plate (8) and one pouring pipe (11) each downstream of the slide plate Units can be received in guides arranged on the intermediate container (2) and are consecutive can be brought in front of the outflow opening of the intermediate container (2) which is provided with a fitting plate (6) are. 2. Device according to claim 1, characterized in that that the slide plate (8) is immediately followed by a control plate (10). 3. Device according to claim 2, characterized in that that the control plate (10) is connected to the pouring pipe (11) 4. Devices according to one of claims 1-3, characterized in that the slide plate (8) and the pouring pipe (11) each have their own displacement cylinder (14 or 15) is assigned. 5. Apparatus according to claim 4, characterized in that the slide plate (8) is assigned Shifting cylinder (14) is attached to the intermediate container trolley (1)