JPH0468293A - Anchor brick for supporting refractory lining and refractory lining supporting structure - Google Patents

Abstract

PURPOSE:To prevent the trouble of cracking or leakage of molten steel of an anchor tile due to thermal stress and facilitate the application of a lining by a method wherein an anchor brick is divided into a plurality of anchor tiles and holes are bored on each neighboring anchor tiles to connect the holes mutually through U-shape fittings while abutting sections of the holes and the anchor tiles between each other are connected with normal temperature adhesive agent. CONSTITUTION:An anchor metal 5 and an anchor tile connecting metal 6 are formed of a steel bar, for example, and a lining is constituted of a permanent lining layer 2 of 100 mm thick and an inner lining layer 3 of 130 mm thick. The outside anchor tile 7 and the inside anchor tile 8 are bonded mutually at the bonding end surfaces 9 thereof through two- part epoxy resin adhesive agent of normal temperature setting type mutually while the metal 5 and the connecting metals 6 are bonded to the metal inserting holes 10 of respective anchor tiles 7, 8 through the same adhesive agent. The outside anchor tile 7 is bonded to the inside anchor tile 8 strongly through the anchor tile connecting metal 6 and the bonding surfaces 9 of the anchor tiles whereby the anchor tiles 7, 8 can be fixed to a steel skin 1 by only inserting the anchor metal 5 into the anchor metal receiver 4 of the steel skin 1 and the application of lining castable can be effected very easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to anchor bricks and refractory lining support structures for supporting refractory linings of kilns and molten metal containers. Concerning possible anchor bricks and support structures.

[Prior Art 1] Generally, when constructing a refractory lining for a kiln or molten metal container, in order to prevent the refractory lining from collapsing or protruding inward during use, for example, the Refractory Technology Association [ed.]
Anchor hardware and anchor bricks such as those shown in Refractories and Furnace Construction Engineering, Part 2 (1973) J I), 131 are used.

In particular, when monolithic refractories are used as refractory linings,
3-289 (published by Nippon Bribrico), various anchor jigs are used to ensure the strength of the structure.

In steel containers that maintain temperature control, if the refractory lining is damaged, the contents may melt the steel shell and flow out, leading to a major accident, so special care must be taken in designing the refractory lining.

On the other hand, since the side wall refractory lining of the ladle is usually cylindrical, the refractory lining used for the lining exerts sufficient durability as a structure.

However, in the case of a planar shape such as the side wall of a continuously cast tandem dish, no pressing force can be expected, so it was necessary to physically increase the strength of the side wall using anchors or the like to improve durability.

[Problems to be Solved by the Invention j] In the case of a planar refractory lining such as the side wall of a continuous casting tandy dish, if a conventional anchor jig as shown in Fig. 4, Fig. 5 or Fig. 6 is used, the following will occur. There were some problems. Note that FIG. 5 is a cross-sectional view, and FIG. 6 is a vertical cross-sectional view.

■As shown in Figure 4, when the lining 2.3 is supported from the steel shell l using metal anchors 11.12, the anchors 11.12 melt and disappear as the refractory material melts. There is a risk of steel leakage.

■As shown in Figs. 5 and 6, lining 2. from iron skin 1. using real anchor tiles 13 made of refractory material.
3, the anchor tile 13 is attached to the lining 2.3.
The anchor tiles 13 cannot follow the thermal behavior of the anchor tiles 13 themselves, and there is a risk that they will crack due to thermal stress, or that even a single crack will result in rapid damage and disappearance, causing steel leakage due to the anchor tiles 13.

In order to eliminate the above drawback of ■,
In the publication, as shown in FIG. 3, the anchor brick for the monolithic refractory 21 is divided into an inner brick 14, a central brick 15, and an outer brick I6,
A connecting groove 17 is provided on the surface of the inner brick 14 where the inner brick 14 and the central brick 15 come into contact, and a connecting protrusion 18 that is inserted into the connecting groove 17 is provided on the surface of the central brick 15. A connecting groove 17a having the same shape as the connecting groove 17 of the inner brick 14 is provided on the surface of the central brick 15 where the central brick 15 and the outer brick 16 contact, and a connecting groove 17a having the same shape as the connecting groove 17 of the inner brick 14 is provided on the surface of the outer brick 16. A connecting protrusion 1 having the same shape as the connecting protrusion 18 of the central brick 15 inserted into the connecting groove 17a.
8a are respectively provided, and a brick fixing metal fitting insertion hole is provided in the surface of one example of the iron skin of the outer brick 16, into which a brick fixing metal fitting 19 fixed to the iron skin 1 is inserted and fixed to the iron skin l. 2
A connecting anchor brick for monolithic refractories has been proposed, which is characterized by being provided with 0.

However, the following problems arise when the connecting groove 17.17a and the connecting protrusion 18.18a are joined only by fitting together.

■ Shearing force acts on the connecting groove and the connecting protrusion, making the connecting part easy to break.

■Connecting round part 17.17a and connecting protrusion 18.18a
There is an upper limit to the dimensional accuracy of refractory bricks, and in order to fit them together, the groove 17.17a must be made larger and the protrusion 18.18a smaller. Therefore, before constructing the monolithic refractories 21, it is recommended to fix them to the brick fixing metal fittings 22 of the vertical steel shell l via the brick fixing metal fittings 19, as shown by the solid line in FIG. Even so, there is a high risk that the inner brick 14 and the central brick 15 may fall off or the joint may crack.

Therefore, the technology of Utility Model Application Publication No. 52-437 is 1, for example,
Used for lining construction with plastic refractories, where the construction method is to build the side wall refractories from the bottom in the F direction, and after the connecting anchor bricks can be received by the side wall, the connecting anchor bricks are fixed to the steel shell. However, it is considered that it cannot be used for lining construction with cast monolithic refractories.

The present invention solves the above-mentioned drawbacks of the prior art, and eliminates steel leakage accidents due to loss of metal fittings when only metal anchors are used, and anchors made of refractory materials like real anchor tiles. Steel leakage accidents due to cracks and fractures due to thermal stress in tiles, and even more.

To provide an anchor brick for supporting a refractory lining, in which the anchor brick can be fixed to an iron skin before the construction of the refractory lining, and the lining can be easily constructed using cast monolithic refractories.

Another object of the present invention is to provide a refractory lining structure in which a monolithic refractory layer that does not collapse or protrude inward is constructed on the innermost side using the anchor bricks for supporting refractories.

[Means for Solving the Problems J] The present invention solves the above-mentioned problems and employs the first technical means. In other words, the anchor brick was divided into multiple anchor tiles, each adjacent anchor tile was drilled, the holes were connected with a U-shaped metal fitting, and the holes and the abutting parts of the anchor tiles were bonded with room-temperature adhesive. This is an anchor brick for supporting fireproof lining, which is characterized by:

In the present invention, the term "room-temperature adhesive" refers to an adhesive that has adhesive ability at room temperature.

Further, one end portion of each anchor tile of the plurality of anchor bricks according to claim 1 is fixed to a steel shell, and the fireproof lining support has a structure in which the steel shell supports the monolithic refractory layer within the steel shell via the anchor bricks. It may also be a structure.

"effect" The effects of the present invention are as follows.

■The refractory for supporting the refractory lining of the present invention is divided into multiple pieces in the longitudinal direction under usage conditions, so it can sufficiently follow the behavior of the refractory lining itself such as thermal expansion, deformation, and shearing, making it difficult for cracks to occur. .

■Since the anchor bricks are integrated using room-temperature adhesive, the anchor bricks will not fall out and can be stably held and fixed to the steel shell before the fireproof lining is installed. Moreover, since the adhesive disappears after heating, it does not interfere with the effect of (2).

■The supporting (holding) structure of the refractory lining is always connected to the steel shell through a refractory material, which eliminates the risk of steel leakage that would occur if the steel shell was supported directly with metal anchors.

[Example 1] Fig. 1 and Fig. 2 show an example in which the present invention was applied to the side wall of a continuous casting tundish with two strands having a volume of 75 tons.

Anchor fittings 5 and anchor tile connecting fittings 6 are JI
It was formed from a 10 mm diameter steel rod of S,5CH22. In the lining structure, the permanent tension layer 2 is 100 mm, the lining layer (high alumina castable) 3 is 130 mm, and the total lining thickness is 230 mm.

The outer and inner anchor tiles 7.8 are bonded to each other at their joint end surfaces 9 using a two-component poxy resin adhesive that hardens at room temperature, and the metal fittings 5 and connecting metal fittings 6 are also bonded with the same adhesive to each anchor tile 7.8. It was glued to the metal fitting insertion hole 10 of.

In addition, although the joint end surfaces of No. 9 were bonded in the above, by adjusting the dimensions of the anchor chain fittings 6, a gap or an allowance for insertion of combustible material was provided at the joint end surface No. 9, and inner anchor tiles 8 after heating were created. It is also possible to increase the movement margin.

Since the outer anchor tile 7 and the inner anchor tile 8 are firmly bonded by the anchor fitting 5, the anchor tile connecting fitting 6, and the anchor tile joining surface 9, just insert the anchor fitting receiver 4 of the iron skin l and the hair anchor fitting 5. The anchor tiles 7.8 could be fixed to the iron skin l, and the construction of the lining castables could be done extremely easily.

It goes without saying that various conventional techniques can be used as is for the refractory support structure for the iron shell 1 by the anchor fittings 5.

[Effect of the invention J] The present invention enables the inner refractory layer to be supported from the steel shell through the refractory, which prevents the refractory layer from protruding into the inside of the collapsed structure and prevents leakage caused by the support itself. It is now possible to completely protect against steel.

Furthermore, by dividing the support in the thickness direction of the lining, a support structure that can follow the thermal behavior of the lining has been created, so the durability of the lining has been improved by 1.4 times compared to the conventional one.

[Brief explanation of the drawing]

FIG. 1 is an explanatory side cross-sectional view of an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1, and FIGS. 3 to 6 are explanatory cross-sectional views of a conventional example. . l-...Iron skin 2...Permanent fireproof lining 3...Inner fireproof lining 4...Metal fitting receiver 5...-Metal fitting 6--Connecting fitting 7...-Outer anchor tile 8
---Inner anchor tile 9...Joint surface 10--Connecting fitting insertion hole 11.
12...Metallic anchor] 3-...Anchor tile

Claims (1)

[Claims] 1 An anchor brick is divided into a plurality of anchor tiles,
An anchor for supporting a fireproof lining, characterized in that each adjacent anchor tile is drilled and the holes are connected to each other with a U-shaped metal fitting, and the holes and the abutting portions of the anchor tiles are bonded with a room temperature adhesive. brick. 2. One end of each anchor tile of a plurality of anchor bricks according to claim 1 is fixed to a steel shell, and the steel shell supports the monolithic refractory layer within the steel shell via the anchor bricks. A fire-resistant lining support structure featuring: