KR850001924Y1 - Nozzle of ladle - Google Patents

Abstract

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Description

Applied Metal Discharge Sliding Nozzle System

FIG. 1 is a front sectional view of an embodiment of the present invention, and a sectional view of the main portion extending to line II of FIG. 2.

Figure 2 is the bottom floor.

3 is the same side view.

* Explanation of symbols for main parts of the drawings

(1): ladle bottom wall (2): first pressure mechanism

(3): 2nd pressure mechanism (4): basic housing

(10c): sliding plate (10d): change nozzle

The present invention relates to a sliding nozzle device for controlling the discharge of molten metal for use in molten metal containers such as ladles, tundish, etc. The sliding nozzle relates to a sliding nozzle apparatus capable of efficiently exchanging the refractory portion of the nozzle portion burned out by molten metal by giving uniform contact bonding to these refractory portions.

Since the refractory nozzles used to adhere to ladles, tundishes, and the like to restrict the discharge of molten metal therein are long-shape bodies having a long axial length of the nozzle holes, the manufacturing cost is inevitably high. In addition, because of the high temperature and weight of the molten metal, the burnout is also severe and must be replaced frequently. For this reason, a refractory nozzle is an important technical apparatus which substantially determines the improvement of productivity and stability, and this improvement effect is remarkably large. Therefore, the development of a long-axis nozzle that can be configured by combining a plurality of refractory parts having a relatively short shaft length, for example, an upper nozzle, a sliding plate, a lower nozzle, and the like. With the development background of the prefabricated nozzles, the reduction of the manufacturing cost that can be taken out of the short-axis flat refractory, the improvement of the fire resistance of the nozzle by changing the quality or type of the plurality of refractory materials, and further the damaged part In order to achieve a reasonable reduction of the replacement cost of the refractory nozzles, which is expected to be exchanged in the case of the replacement of the refractory nozzles, the technical task, which is important for the practical use of the refractory nozzles of the assembled structure, that is, the replacement of the burned-out part, It is an object of the present invention to establish an exchange technique for a nozzle for assembly refractory structure such that the contact force to be given is sufficiently constant as necessary.

The composite long elongated refractory nozzles constituted by assembling a plurality of single piece refractory parts having a shorter shaft length improve the following problems arising from the contact surfaces or the contact portions of these parts, and the above-described rationality of the composite nozzles becomes practical. The problem that the molten metal having a large mass flowing through the nozzle hole (hereinafter referred to as molten steel) damages the mutually contact surfaces of the refractory nozzle portions is caused by the molten steel rectifying which may occur depending on the continuous communication state of the nozzle hole and the contact surface state. The problem of vortexing rather than vortexing, and the problem of scattering in which vortexed molten steel can occur at the nozzle outlet, is improved as far as possible if a good contact surface is maintained with sufficient pressure contact that requires mutual contact.

In other words, the sliding nozzle apparatus in which the assembled contact surface of the refractory nozzle portion can be imparted with a sufficient pressure contact force can be safely and economically exchanged by the technical means for the refractory of the desired nozzle portion. It was proposed in front of this application by Japanese Utility Model Publication publication digestion 52-36714.

The development and establishment of this exchange technology means that each of the nozzle part refractory materials is made of a material that is immediately adapted to the distribution of molten steel, and thus the durability, safety, and economic efficiency (ie productivity) are remarkably higher than those of a refractory nozzle having a long shaft of a single material. An improved compound refractory nozzle can be obtained.

However, this previous proposal makes a nozzle assembly plant in a nozzle plant in a steel mill to assemble the nozzle with proper joining, and this assembly nozzle can be practical unless highly skilled. Therefore, the present invention is to solve this problem, and in the molten metal discharge sliding nozzle device which is assembled at the bottom of the container by assembling a plurality of refractory members including a sliding plate and a change nozzle, the refractory member to be attached to the sliding plate and the upper part thereof is provided. A first pressure mechanism for supporting and applying a predetermined pressure is installed in the user, and a second exchange pressure mechanism for connecting and supporting the change nozzle against a lower surface of the sliding plate is installed inside the first pressure mechanism. A sliding nozzle apparatus is proposed, wherein the joining criterion between a plurality of refractory members is provided independently of the first pressurizing mechanism and the second exchange pressurizing mechanism.

In the following example, the case where the required nozzle is comprised by the four parts refractory body is demonstrated. That is, the bottom plate 10b in which the insertion nozzle 10a mounted in the ladle at the bottom wall 1 of the ladle and the convex part 11b corresponding to the recessed part 11a formed at the bottom of this nozzle 10a are formed on the upper surface. 11d corresponding to the sliding plate 10c in contact with the nozzle bottom plane 10'b and the plane 10'c and the convex portion 11c formed at the bottom of the sliding plate 10c. ) Is applied to the change nozzle 10d having the upper surface, and the necessary sufficient pressure contact force calculated from the bottom plate 10b on the upper side of the at least third sliding plate 10c and the two contact surfaces included in the insertion nozzle 10a. A second exchange pressurization supported by the ladle bottom wall 1, which is added to the first pressurizing mechanism 2 for addition, and specified in a small axial movement tilting action surface in the pressurizing action zone of the first pressurizing mechanism 2. The mechanism 3 is provided between a part of the pressurizing mechanism 2 and the supporting member of the change nozzle 10d, and refractory is made by these first and second mechanisms. Min (10a), (10b), (10c), each pressure contact force necessary for the mutual contact surfaces of (10d) is to act, and is yet to the exchange of parts. The remarkable rationalization of the manufacturing cost achieved by dividing the nozzles of the refractory parts 10a, 10b, 10c, and 10d into five relatively short shaft lengths, starting with the refractory brick 10e, It was safely put into practice by the establishment of this exchange means. How many parts of a refractory nozzle is compounded is suitably selected according to the conditions. Contact surface irregularities are likewise selected. In addition, in the combination of the refractory portion corresponding to the bottom plate 10b and the sliding plate 10c, it is possible to easily form a flat body as shown in the figure. By using this shape, the heat dissipation of the refractory is improved, and the use time of the nozzle is increased. In addition, by disposing the exchange member 12c around the refractory 10c, the required heat dissipation effect can be enhanced.

In FIG. 1, the basic housing 4 attached to the outer side of the ladle bottom wall 1 is detachably fixed to the bottom plate 10b at the center thereof, and is supported by the bearing connectors 4a attached to both sides thereof. When the upper convex part 11b of the bottom plate 10b and the insertion nozzle 10a of the upper part 11b are in close contact with the recessed part 11a by the bearing freedom degree. Attached to the basic housing 4 is the first pressurizing mechanism 2, which is connected to the shaft rod of the bearing connector 2a, and the pressing plate 2b which can move in the vertical direction on the drawing, and the pressing plate 2b. The upwardly acting pressing member 2c on the drawing is attached using the shaft end of the bearing connector 2a. In most cases, coil springs, leaf springs, magnetic forces, and sometimes oil pressure, are appropriately used as sources of pressurization.

The slide 2d coupled to slide on the upper surface of the pressing plate 2b supports the sliding plate 10c described above. Molten steel (continuous). Depending on the amount of heat dissipation, the sliding plate can be a refractory material of a more suitable material or a flat body of a more suitable size, and the practical effect is enhanced by coupling with the exchange member 12c.

The annular frame 3a is attached to some constituent members of the first pressing mechanism 2 to form the main part of the second exchange pressing mechanism 3 described above. The annular frame 3a has a through coupling portion 3b at a symmetrical position. The pressing protrusion 3c of the method which can pass this through coupling part 3b is attached to the support ring member 3d. This support ring member 3d supports the change nozzle 10d. The second exchange pressurizing mechanism 3 in the above-described configuration has an upper surface of the annular frame 3a passing through the pressing projection 3c of the support ring member 3d on which the change nozzle 10d is mounted via the through coupling portion 3b. It is completed by contacting. Thus, one or both of the protrusions 3c and the frame 3b is provided with an axial movement tilting action surface having an inclined surface in the circumferential direction. These relatively engaged protrusions and the frame 3a move the change nozzle 10d upward on the drawing by the inclined surface, and press-contact the nozzle 10d and the sliding plate 10c. This pressure contact not only closely connects the nozzle 10d and the sliding plate 10c, but also affects the pressure contact force of the first pressure mechanism 2 applied to the pressure plate 2b guided by the axial rod of the connector 2a. It can act as a contact force between the sliding plate 10c and the nozzle 10d which were newly connected independently without giving. That is, in principle, as described above, since the second exchange pressurizing mechanism 3 is installed in the pressurizing action zone (practical) of the first pressurizing mechanism 2, the pressurization pressure of the first pressurizing mechanism 2 is reduced. There is no influence, and the necessary pressure force can be applied between the refractory nozzle portions. In addition, this structure can easily and accurately exchange any refractory.

When the handle protrusion 3e is formed in the portion extending toward the exit of the change nozzle 10d of the support ring member 3d, the second exchange pressure mechanism 3 is merely rotated to operate the protrusion 3e. The pressure contact force can be added as a contact force between the change nozzle 10d and the sliding plate 10c above it via. By applying fillers such as mortar and tar to the contact surfaces between the refractory materials, a contact surface with a further improved effect is obtained, and the safety of the refractories portion is excellent.

As described above, the composite refractory nozzle apparatus of the present invention, which can rationalize the production cost and the consumption cost of the refractory nozzles while increasing the safety of use thereof, has a molten steel discharge function by establishing an excellent replacement structure of the refractory parts. In particular, since it is remarkably improved in the continuous double axis, it is used for the molten steel flow rate adjustment in the continuous casting tundish, and can also be applied to the lower nozzle of an ordinary ingot. Furthermore, even when vortex occurs in discharging molten steel, rectification is obtained at the nozzle hole outlet, and it is possible to prevent sticking of the gas in the nozzle hole and the outlet part, so that good discharge can be performed.

Claims (1)

In the molten metal discharge-operated nozzle apparatus comprising a plurality of refractory members including a sliding plate 10c and a change nozzle 10d and configured at the bottom of the container, the refractory member to be attached to the sliding plate 10c and the upper portion thereof has a predetermined pressure. The second exchange pressure mechanism (3) for installing and holding the first pressurizing mechanism (2) to hold and attach the change nozzle (10d) to the lower surface of the sliding plate (10c) by applying a predetermined pressure to the container is provided. Sliding is provided inside the first pressure mechanism (2), so that the first pressure mechanism (2) and the second exchange pressure mechanism (3) independently provide a joining criterion between the plurality of refractory members. Nozzle unit.