JPH06194061A - Monolithick refractory lining method by formed styrol core shell - Google Patents

Abstract

PURPOSE:To simply achieve a monolithick refractory lining construction onto piled permanent lining refractory brick masonry by doing the same by setting a core formed with a foamed styrol core on a shell wall of a molten metal container. CONSTITUTION:There are disposed and fixed with an adhesive as a cantilever surface preparation on laminated permanent lining refractive brick masonry 2 many anchoring bricks 4 using refractory bricks of the same quality as that of the laminated permanent lining refractory brick masonry 2 at portions in a shell wall of a molten metal container. In contrast, there is prepared divided cores where a foamed styrol plate material is divided into fan type segments 6, 7, 8 and square segments 9, 10, and the divided cores are laid using anchor bricks 4 as spacers, and are held and fixed using such as inner timbering work 15 as a beam 12, a protrusion rod 13, and a stay 14 laid in the molten metal container so as to form a core shell 11. There is further performed a casting molding of a monolithick refractory into a space between the laminated permanent lining refractory brick masonry 2 and the core shell 11.

Description

Detailed Description of the Invention

[0001]

[Industrial application] Useful for simplification of refractory construction for molten metal containers required for operations such as delivery and handling or transportation of molten metal in the process of refining metals such as steel, typified by Torpedo cars, The present invention relates to a method for lining an amorphous refractory with a styrofoam core.

[0002]

2. Description of the Related Art A molten metal container of this type has a steel shell exterior and
Has permanent pasting refractory brick tension, and often the interior lining refractory construction for permanent pasting refractory brick stacking,
It is done to allow regenerative repair under unavoidable damage due to direct contact with molten metal and slag.

For this interior lining, it is of course possible to employ construction of refractory bricks, but it has the disadvantage of requiring a lot of man-hours and skill, while troweling and spraying with an irregular shaped refractory material repairs the refractory bricks. Used as.

It is also known that a core mold is used to secure the required thickness of the interior lining refractory layer on the inner surface of the layer of permanently laminated refractory bricks, and the core mold is worked by this mold. Various measures have been devised to prevent fluctuations in lining thickness due to buoyancy.

For example, JP-A-53-146932 and JP-A-1
No. 167589 discloses that a core mold is formed by filling a fluid inside a flexible bag body.
In Japanese Patent Publication No. 90, it is disclosed that water is poured into the core to face the buoyancy, and in Japanese Patent Laid-Open Publication No. 1-179888, a cylindrical hollow frame body composed of an airtight double bag-like membrane and an outer coating is disclosed. A core device adapted to be combined with a support framework is described.

In either case, however, the core-type structure is large and heavy, and the cost is high, and since a high internal pressure is required, it is not necessary to increase the strength of the bag body or the membrane, otherwise safety is a problem. I have left.

[0007]

Regardless of whether or not it is a kiln furnace type whose periphery is hermetically sealed like a topido car, it is introduced into a molten metal container through a furnace port (usually 1.5 to 2 m in a topido car). Disadvantages in the prior art as described above are obtained by using a partitioning core made of expanded polystyrene plate material that is pre-divided into a size that can be carried in and is subdivided into the shape required for the inner surface of the lining when assembled in the furnace. This eliminates the need for skilled workers and eliminates the need for a work environment and does not increase the man-hours required for safe construction. It is the object of the invention to propose.

[0008]

DISCLOSURE OF THE INVENTION The present invention is intended to line an inner surface of a molten metal container having an outer surface of a molten metal container and an inner surface of a molten metal container having a permanently attached refractory brick stack with an amorphous refractory material. A number of anchor bricks made of refractory bricks of the same quality as permanent bricks are placed and secured as key mold kerens on multiple points on the lower half wall surface including the bottom of the molten metal container. By means of the anchor bricks, a segmented core made of expanded polystyrene plate material, which is divided into a size corresponding to the maximum size I of the furnace opening of the molten metal container and a shape corresponding to the inner surface shape of the container, is formed between the anchor bricks. While supporting and laying them out, the core shells made of these segmented cores are held and fixed by the internal support provided in the furnace, and then the mold holding keren is embedded between the lower half wall and the core shells. Killing The cast iron is cast and then the cast refractory is solidified, then the internal supports are dismantled, and the anchor bricks on the remaining wall of the molten metal container are used to reciprocate them. Unshaped refractory that lays out core shells composed of the same divided cores over a period of time, holds and fixes them by internal support, and then burys the mold-bearing keren between the remaining shell wall and core shells. Cast molding is performed to interconnect with the previously shaped amorphous refractory, and then the castable amorphous refractory is solidified to dismantle the internal support and melt with the partition core. This is a method for lining a non-standard refractory material with a styrofoam core, which is characterized by excluding it outside the metal container.

The amorphous refractory is a powder refractory material obtained by mixing alumina cement or a phosphate compound with refractory aggregate, and so-called hydraulic castable, which is used by adding water and kneading, is suitable. To do. For the styrofoam plate material, for example, JIS A 9511-1979 foam polystyrene heat insulating material is used, and the foam polystyrene heat insulating plate No. 1 is used. The inner surface of the lining layer of the molten metal container is the lower half wall including the furnace bottom and the remaining wall. Each of the two divided shapes can be used as a segmented core formed into a subdivided shape that can be assembled and embodied by a cutting piece divided into a size that can be inserted from the furnace opening of the container.

The inner supporting work for holding and fixing these segmented cores as a core shell is in the form of a beam, rod stay or brace, and maintains the shape of the core shell during the casting of the amorphous refractory material. , It is based on the cast indeterminate refractory that acts on the core shell and is used so that it can support buoyancy, and of course, all the elements of the internal support are of a length that allows insertion from the furnace port. .

[0011]

In the present invention, first, the key points on the inner surface of the body wall of the molten metal container having the iron-sheath exterior and the permanently-bonded refractory brick are:
A large number of anchor bricks made of refractory bricks of the same quality as permanent pasting refractory bricks are mounted and fixed as mold holding keren,
For this fixing, an adhesive that is compatible with the material of the refractory brick used and provides sufficient adhesive strength is used.

Next, a partitioning core is inserted from the furnace opening of the molten metal container, laid on the anchor bricks on the lower half body wall including the furnace bottom, and beams, rods, stays, which are also inserted from the furnace opening,
An inner support structure consisting of breasts is constructed to hold and fix the core shell in the furnace.

Then, cast molding of an indeterminate refractory material is carried out in the gap between the lower half body wall and the core shell, and this is usually solidified in about 12 hours, so that it is unnecessary and a part of the internal support work is unnecessary. After dismantling and removing it to the outside of the furnace, lay out segmented cores on the remaining brick wall in the same manner as above and hold and fix the core shell corresponding to this by internal support work. Inflow molding of irregularly shaped refractory was performed in the gap between the core and the core shell, and this also solidified after about 12 hours, and the internal support was dismantled. Take it out of the furnace.

As described above, the inner layer lining in close contact with the permanently-bonded refractory bricks of the molten metal container can be formed by casting the amorphous refractory material. Here, all of the anchor bricks are buried and integrated in the inner lining layer, but it goes without saying that the adhesive can be diverted in advance as a means for strengthening the adhesion if necessary.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of applying an amorphous refractory lining method according to the present invention to a toroid car is illustrated in FIGS. 1, 2 and 3. In the figure, reference numeral 1 is a steel skin of a topido car, 2 is a permanently attached refractory brick, and 3 is an amorphous refractory lining.

The topido car has an outer shape in which a truncated conical cylinder 1b is connected to both ends of a cylindrical cylinder 1a, and an oval shape (approx. 1 m × 1.5 m) is opened at the top of the cylindrical cylinder 1a. It has a mouth (not shown) and is mounted on a carriage (not shown) as a whole so as to be rotatable around the center axis of the body.

The iron-sheath outer casing 1 constituting the cylindrical body 1a and the truncated conical body 1b has a permanently attached refractory brick stack 2 on its inner surface, and an amorphous refractory lining 3 is applied on the inner surface thereof to form a molten metal container. Useful. In this invention, first, a stack of permanent refractory bricks 2 is provided with a number of anchor bricks 4 made of refractory bricks of the same quality as the stack of permanent refractory bricks 2 at a key point on the inner surface of the body wall of the molten metal container as a mold holding keren. It adheres firmly with an adhesive.

On the other hand, a polystyrene foam board (JIS A
9511 Foam-shaped polystyrene heat insulation plate No. 1 (thickness mm) is cut into a width that allows it to be inserted from the furnace opening of the cylindrical cylinder 1a into a length of almost half the circumference of the inner surface of the molten metal container. 7 and 8 and partition cores divided into square segments 9 and 10 corresponding to the cylindrical body 1a are prepared, and these partition cores are first placed on the wall surface of the lower half body including the furnace bottom of the molten metal container. As shown in FIG. 2, the anchor bricks 4 are laid out as spacers so that the core shell 11 is formed. The beams 12, the piercing rods 13, and the internal supports 15 such as stays 14 stretched inside the molten metal container.
Held and fixed by.

Therefore, casting of an indefinite refractory material was performed in the gap between the permanent-clad refractory brick stack 2 and the number of cores 11 forming the lower half wall of the molten metal container. Then, after the solidification (about 12 hours), the beam 12 and the projecting rod 13 are removed and removed outside the furnace, the remaining anchor bricks 4 on the trunk wall are used as spacers and the same partition cores of FIG. The core shell 16 of the upper half is formed as described above, and the projecting rod 17 is held and fixed as an internal support, and then the irregular-shaped refractory is provided in the gap between the upper shell wall of the molten metal container and the core shell 16. Was cast-molded.

It also takes about 12 hours to solidify, and after that, by removing the internal supports and all-section cores from the furnace opening of the molten metal container, the anchor bricks 4 are cast by looking at the above-mentioned gaps. We completed the construction of the unfixed refractory lining that was wrapped and fixed, and was continuously integrated between the upper and lower body walls.

Although the application example of the topido car has been described above, it goes without saying that the present invention can be applied to other refractory metal linings such as ladle and tundish. In any case, it goes without saying that the sorting core and the supporting members taken out from the furnace opening after the lining work can be reused.

[0022]

EFFECTS OF THE INVENTION According to the present invention, it is not necessary to arrange personnel such as a skilled brickworker, the work environment is not deteriorated as in the case of using the spraying method, and further, the number of man-hours required is not required. Enables lining construction.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view in a longitudinal direction showing a lining construction procedure of a topido car.

FIG. 2 is a cross-sectional view in the middle of lining construction.

FIG. 3 is a transverse cross-sectional view during completion of curing of the lining construction.

[Explanation of symbols]

 1 Exterior iron skin 2 Permanently bonded refractory bricks 3 Unshaped refractory lining 4 Anchor bricks 6-10 Division core 11, 16 Core shell 12-14 Internal support

Claims (1)

[Claims] Claims: 1. When lining a refractory refractory material on the inner surface of a molten metal container having an iron-sheath exterior and a stack of permanently bonded refractory bricks, the permanently bonded refractory bricks are provided at key points on the inner surface of the body wall of the molten metal container. In addition, a large number of anchor bricks made of the same quality refractory bricks are arranged and fixed as mold holding kerens, and the anchor bricks on the wall of the lower half of the body, including the furnace bottom of the molten metal container, are connected to each other. While supporting and laying a segmented core made of expanded polystyrene sheet material divided into a size corresponding to the maximum size of the furnace opening of the molten metal container and corresponding to the inner surface shape of the container, The core shell of the divided core is held and fixed by the inner support provided in the furnace, and then the castable amorphous material is poured between the lower half wall and the core shell to bury the mold-bearing keren. Molded and then casted to solidify the unshaped refractory, and after the dismantling of the above internal support work, a plurality of anchor bricks on the remaining barrel wall of the molten metal container provide similar partition cores between them. The core shells are laid side by side, held and fixed by the internal support, and then the castable amorphous material is buried between the remaining shell wall and the core shell. After interconnecting with the irregular shaped refractory, the solidification of the castable irregular shaped refractory is dismantled and the above inner support is dismantled, and it is removed to the outside of the molten metal container together with the partition core. A method for lining an amorphous refractory with a styrofoam core.