JPH0583697U - Refractory molding equipment for molten metal containers - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention provides a refractory forming apparatus that enables the use of a stamp material of stable quality as an irregular refractory when forming or repairing a refractory lining a molten metal container. The purpose is to [Structure] The device comprises an inner cylinder 5 which can be inserted into the inner surface of the ladle 1 with a gap C therebetween, and an outer cylinder 7 which is made of an expansive material and surrounds the outer side of the inner cylinder 5. It has a core part and a high-pressure pump 10 for filling a space S formed in the outer cylinder with a fluid such as water. The stamp material M filled in the gap C is lined by the outer cylinder 7 expanded by the fluid. Form refractory.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a refractory forming apparatus for forming or repairing a refractory lining for a molten metal container represented by, for example, a ladle for casting. The present invention relates to a refractory forming device when using an irregular refractory.

[0002]

[Prior Art]

 For example, the refractory provided inside the molten metal container represented by a casting ladle requires skill and time for repair and construction, so conventional refractory (brick etc.) In recent years, it tends to be composed of granular amorphous refractories. Taking the ladle as an example of its construction, first, a core made of a material such as a steel plate is inserted to secure a space for putting molten metal in the ladle. A non-standard refractory material was filled in between the two and the refractory material was formed using a hardening material such as castable cement binder.

[0003]

[Problems to be solved by the device]

 However, such a method requires a large amount of water to secure the strength of the amorphous refractory, and also requires a considerable amount of time for kneading, curing, drying and the like in its molding, resulting in poor work efficiency. The molded refractory itself was easily affected by the length of each process time and the temperature, and the quality was unstable. On the other hand, there is a method of using an irregular shaped refractory material called a stamp material with a small amount of added water.However, when forming the stamp material, for example, a device called an air rammer must be used to compact and compress the stamp material. However, when using a conventional core as shown in Fig. 3, a small gap C between the ladle 1 and the core may not be sufficient to secure the working area of the device, so that the molding part is not compressed. There were problems in strength, as there were enough places. In view of the above problems, the present invention is a refractory material that can be used as an irregular shaped refractory material that has a short curing and drying time and a small amount of added moisture, and that the molding operation is easy and that it can be uniformly compressed over the entire molding portion. An object is to provide a molding device.

[0004]

[Means for Solving the Problems]

 For the above purpose, according to the present invention, the fluid supply means and the molten metal container are constituted by a core portion formed so as to be accommodated with a gap (C), and the core portion includes the inner cylinder (5) and the inner cylinder. An outer cylinder (7) which surrounds the outside of (5) and which is formed of an expansive material and has a closed space (S) inside which is connected to the fluid supply means, is provided with a fluid in the closed space (S). Provided is a refractory forming apparatus for a molten metal container, which compression-molds an amorphous refractory filled in a gap by expansion of an outer cylinder (7) supplied with.

[0005]

[Action]

 During molding of the refractory, the fluid supply means is actuated to expand the outer cylinder, so that the refractory filled in the gap between the outer cylinder and the inner surface of the molten metal container is compression-molded from the inside.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which a refractory forming apparatus for molten metal containers (hereinafter referred to as a forming apparatus) according to the present invention is used to repair the refractory lining of a casting ladle 1 which is a molten metal container. The outer circumference of the cup-shaped ladle 1 is covered with the iron skin 2, and a layer composed of a large number of backing bricks 3 is formed on the inner side of the inner side of the ladle. Has a layer consisting of four bricks. In this embodiment, the present molding apparatus is used for repairing the lining brick 4 that is consumed during the operation. The molding device is roughly divided into a core part installed inside the ladle 1 at the time of repair and an operating part 6 as a fluid supply means. It is formed smaller than the space of the formed molten metal reservoir T. As shown in the figure, the core portion is composed of a hollow cylindrical inner cylinder 5 formed of, for example, a steel plate, and an outer cylinder 7 that wraps the inner cylinder 5. A core lid 9 with a ring 8 is fixed. The outer cylinder 7 is formed of an expansive material typified by, for example, hard rubber, and is installed so as to define a closed space S inside.

On the other hand, the operating unit 6 of the molding apparatus 1 includes a high-pressure pump 10 for pumping a fluid represented by water, and a water supply pipe 11 for guiding the water from the high-pressure pump 10 to the space S. The water supply pipe 11 penetrates the above-mentioned core lid 9 and opens into the space S from one upper end of the outer cylinder 7. A flexible hose 12 is provided in the middle of the water supply pipe 11 so that the core can be moved more easily with respect to the high-pressure pump 10 installed on the floor D. Further, to this space S, a drain pipe 13 for discharging the water filled in the space S after molding the refractory to the outside is connected in the same manner as the water supply pipe 11, and the drain pipe 13 is connected to the drain pipe 13. A flexible hose 12 and a stop valve 14 that is closed during water supply and opened during drainage are provided along the way.

When molding a refractory material inside the ladle 1 using the molding apparatus configured as described above, first, a stamp is applied to the bottom of the molten metal reservoir T of the used ladle 1. The material M is laminated to a uniform thickness, and then the core of the molding apparatus is placed on it by a transportation means such as a hoist (not shown), and then between the outer cylinder 7 and the lining brick 4. The remaining stamp material M is filled in the formed gap C. As a matter of course, when the core portion is placed, the molten metal reservoir T is concentrically positioned and filled so that the width Wc of the gap C is substantially uniform in the circumferential direction. It is preferable to consider so that the variation in the thickness of the stamp material M in the circumferential direction is as small as possible.

After the stamp material M having a uniform thickness is filled in the gap C in this way, the high pressure pump 10 is started to be driven next, and the space S of the outer cylinder 7 is filled with the high pressure water. . At this time, the stop valve 14 of the drain pipe 13 is initially opened to discharge the air in the space S, so that the space S is filled with a certain amount of water and the water is discharged from the drain pipe 13. When it is started, it is judged that the exhaust is completed and it will be closed here for the first time.

Then, by continuing to drive the high-pressure pump 10, the amount of water filled in the space S increases, the outer cylinder 7 expands to the outside, and finally the stamp material M becomes the lining brick 4. On the other hand, a pressure (about 200 kg / cm ² or more) that allows compression molding is reached, and in this way, refractory molding on the inner wall of the ladle 1 is achieved. After forming the refractory, as described above, the stop valve 14 of the drain pipe 13 is opened to discharge the water filled in the outer cylinder 7 to the outside. The molding operation will be completed. FIG. 2 shows a refractory forming apparatus according to another embodiment of the present invention. The difference from FIG. 1 is that the outer cylinder 7 is formed in a tube shape and is wound around the inner cylinder 5 in a spiral shape. Therefore, the water supply pipe 11 extends through the inner cylinder 5 to the outer cylinder 7, terminates at the side wall of the outer cylinder, and opens into the space S.

The refractory forming apparatus of the present invention has been described above by taking an example in which water is used as a fluid. However, any fluid may be used as long as it can expand the space S. A fluid such as air can also be molded. Further, although the apparatus of this embodiment is used for repairing the lining of the ladle of the molding object, any molten metal container can be used as long as it can use the amorphous refractory as the refractory for the inner wall. It is applicable and its use is not limited to repair only.

In addition, the repair using the refractory molding device described above requires only 3 construction staff (conventional method: 4 to 5 persons) and the construction time is about 3 hours compared to the conventional castable repair method. It has been confirmed that the working time can be markedly shortened to 2 hours to 3 hours (conventional method: about 24 hours) and the drying time (conventional method: about 8 hours). Further, in this embodiment, since the stamp material is used, the amount of added water is small, and it is possible to stabilize the quality of the molded refractory after the construction as compared with the conventional castable repair method.

[0013]

[Effect of the device]

 As described above, according to the present invention, the core itself arranged in the molten metal container has a double structure of an inner cylinder and an outer cylinder that can expand outward, and an outer cylinder filled with a fluid. Since the irregular shaped refractory is compression molded, it is possible to work easily even if the gap between the container and the core is small, and it is possible to mold and repair the refractory of the molten metal container using a stamp material with stable quality. .

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a ladle including a refractory forming apparatus according to an embodiment of the present invention,

FIG. 2 is a schematic sectional view of a ladle including a refractory forming apparatus according to another embodiment of the present invention.

FIG. 3 is a ladle sectional view at the time of forming a refractory material using a conventional core.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ladle 2 ... Iron skin 3 ... Backing brick 4 ... Inner brick 5 ... Inner cylinder 6 ... Operating part 7 ... Outer cylinder 8 ... Suspension ring 9 ... Core lid 10 ... High pressure pump 11 ... Water supply pipe 12 ... Flexible hose 13 ... Drain pipe 14 ... Stop valve C ... Gap M ... Stamp material S ... Space T ... Molten metal reservoir

Claims (1)

[Scope of utility model registration request] 1. A core portion formed so as to be accommodated in a fluid supply means and a molten metal container with a gap (C), the core portion including an inner cylinder (5) and an outer side of the inner cylinder (5). An outer cylinder (7) which is surrounded and formed of an expansive material and which has a closed space (S) inside which is connected to the fluid supply means, and thus is supplied with fluid in the closed space (S). A refractory forming apparatus for a molten metal container for compression-molding an amorphous refractory filled in a gap (C) by the expansion of (7).