JPH09210568A - Refractory lining on dome portion of hot blast stove - Google Patents

Abstract

(57) [Abstract] PROBLEM TO BE SOLVED: To efficiently and accurately perform lining of a dome portion of a hot-blast stove with bricks without requiring skill. Means: A burnout locking plate 7 is attached to the back surface of the brick 3 in a downwardly extended state in advance, and the downwardly extending portion of the locking plate 7 of the upper brick 3 is attached to the lower side. Stack the bricks in order from the bottom so that they are hooked on the back. The locking plate 7 may be attached to the front surface of the brick 3 so as to extend upward, or may be attached to both front and rear surfaces.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of lining a dome portion with a brick in a dome type furnace having a ceiling surface formed into an inclined surface such as a spherical surface such as a hot air stove attached to a blast furnace. It is a thing.

[0002]

2. Description of the Related Art As shown in FIG. 7, for example, a dome portion 1 of a hot-blast stove attached to a blast furnace generally forms an outer shell 2 provided with a fireproof heat insulating layer 2b inside a steel shell 2a. It has a structure in which an inner lining layer 4 formed by stacking a large number of bricks 3 on the inner surface of the shell 2 is formed. The refractory heat insulating layer 2b is composed of a heat insulating amorphous refractory material, a regular refractory material, or a combination of both. Further, a dowel 3a is formed on one surface of the upper and lower surfaces of the brick 3, and a dowel groove 3b is formed on the other surface of the brick 3, so that the dowel 3a and the dowel groove 3b of the brick 3 are vertically overlapped.
And are fitted together.

As a method of lining the inner surface of the dome portion 1 with the bricks 3, conventionally, as shown in FIG. 7, in order to prevent the bricks 3 from slipping off during construction, the inner surface of the lining layer 4 has a shape. The formwork 5 formed together in an arc shape is supported by the scaffold 6, and the bricks 3 are stacked (stacked) in order from the bottom between the formwork 5 and the outer shell 2. Although not shown, hook metal fittings are also used. This hook metal fitting is generally made of a metal round bar, and is used to fix a long upper brick by hooking it on the back lining. Needless to say, joints are filled between adjacent bricks.

[0004]

However, the method of assembling the mold 5 and lining it requires not only an engineer who is skilled in the production and installation of the mold 5 that matches the lining curved surface of the dome portion 1, but also Since the brickworking work is forced to be performed in the narrow space between the formwork 5 and the outer shell 2, there is a problem that it imposes a great burden on the worker and the construction efficiency is poor.

On the other hand, in the lining method using the hook metal fittings, there is a problem in that the strength of the metal fittings is limited, and therefore the metal fittings are deformed due to the weight of the lining layer 4 to prevent accurate lining. Another problem is that it requires a considerable amount of time and effort to attach and detach the metal fittings. An object of the present invention is to eliminate the above-mentioned drawbacks in a method of lining a dome portion of a furnace with bricks.

[0006]

The present invention includes a method having the following configurations 1 to 4. 1. Before lining the dome part, a retaining plate made of a burnout material is attached to the back surface of each brick in a state of extending downward, and these bricks are attached to the back surface of the lower brick in the upper brick. Stack the stop plates so that the downward extensions of the stop plates overlap. 2. Before lining the dome part, a retaining plate made of a burnout material is attached in advance so that it extends upward on the front surface of each brick, and these bricks are extended upwards on the retaining plate of the lower brick. Stack the bricks so that the front of the upper bricks overlaps the projecting part. 3. Before lining the dome part, attach a locking plate made of burnable material to the back of each brick so that it extends downward, and a locking plate made of burnable material extends upward on the front. Paste these bricks in a state where
The bottom extension of the locking plate of the upper brick is overlapped with the back of the lower brick, and the front of the upper brick is overlapped with the upward extension of the locking plate of the lower brick. To go. 4. In the methods 1 to 3 above, a through hole or a recess opening toward the brick is formed in a portion of the locking plate that is bonded to the brick, and the brick to which the locking plate is attached is used. Do lining for the dome.

In the present invention, the locking plate may be attached to bricks at the construction site, or may be shipped in a state of being attached in advance at a brick factory. Also, as the locking plate, there is no particular limitation as long as it is a material that has a certain level of strength such as a synthetic resin or a wooden plate and is burned down by the heat of using the furnace,
It may be appropriately selected depending on the properties of the furnace.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In addition, the same members and structures as the conventional one are shown in FIG.
The same reference numerals are used as they are and the description thereof is omitted. Figure 1
FIG. 3 shows a first embodiment which embodies claim 1.
Of these, FIG. 1 is a cross-sectional view showing the lining process of the dome portion 1 in the furnace, FIG. 2 is a perspective view of the brick 3 alone, FIG. 3 (A) is a partially enlarged view of FIG. 1, and FIG. It is a side view of a simple substance.

In this first embodiment, as shown in FIG. 2 and FIG. 3B, a brick 3 is used, which is attached to a back surface thereof with a burnout locking plate 7 extending downward. In the case of the dome part 1 in the hot stove, the lining layer 4 is composed of, for example, a group of bricks of about 50 to 60 steps, and a large number of bricks 3
The inner lining layer 4 is formed by stacking the rings, which are stacked in the circumferential direction (horizontal direction) one by one, from bottom to top.

Then, when the rings made up of a large number of bricks 3 are stacked one by one in order from the bottom, the rings shown in FIGS.
As shown in (A), the bricks 3 located in the lower row are stacked one after another so that the locking plate 7 of the bricks 3 in the upper row overlaps (hangs). Then, the upwardly extending portion of the locking plate 7 of the brick 3 located at the upper stage is hooked on the back surface of the brick 3 located at the lower stage. In this case, the bricks 3 located in the lower stage are overlapped in a ring shape, and they are held in close contact with the inner surface of the outer shell 2 by regulating each other, so that the bricks 3 in the upper stage are held non-slip. To be done. That is, when the bricks 3 are stacked in a ring shape to form a brick group at each stage, the locking plate 7 is not necessary.

In this way, by stacking the rings made up of a large number of bricks 3 step by step (one turn at a time), the lining layer 4 can be formed without causing the bricks 3 to slip off. The inventors of the present application actually found that the size of the back surface is 200 mm in both length and width, and the size of the front surface is 15 mm in length and width.
A brick having a length of 0 mm and a length of 350 mm is used, and a locking plate 7 made of an oak plate having a thickness of 5 mm is attached to the back surface of the brick 3 with an epoxy resin while extending downward by 20 mm. The bricks 3 were used to line the dome portion 1 of the hot stove, but as a result, the bricks 3 could be accurately constructed without slipping off without using the formwork 5 as shown in FIG. It was possible to confirm the effectiveness of the present invention.

When the furnace lined in this way is operated, the internal temperature of the hot-air stove rises to 1000 ° C. or more, so that the locking plate 7 is burned down and the lining layer 4 of the dome portion 1 is made of only the bricks 3. Composed of. Therefore, it does not affect the functioning of the furnace. In the case of the first embodiment, since the locking plate 7 burns down, a space corresponding to the locking plate 7 is formed between each brick 3 and the outer shell 2, and this space improves the heat insulating effect. There are advantages. However, if the gap is too large, there is a problem that the lining structure is loosened, and if the locking plates 7 provided on the vertically overlapping bricks 3 overlap each other, accurate bricking becomes difficult. Therefore, it is preferable that the size of the locking plate 7 is set to a size that can prevent the brick 3 from slipping off, and is not increased more than necessary.

FIG. 4 shows a second embodiment of claim 2.
It is an example, of which (A) is a sectional view showing construction,
(B) is a side view of a brick itself. In this second embodiment, the bricks 3 constituting the dome portion 1 are preliminarily attached to the front surface of each brick 3 with an adhesive agent in a state of being extended upward, and the bricks 3 are used. Then, in the same procedure as in the first embodiment, the bricks 3 in which the front surface of the bricks 3 in the upper row are located in the lower row
The furnace dome portion 1 is lined by sequentially stacking the locking plates 7 so as to overlap the upwardly extending portions thereof.

In this case, since the bricks 3 located at the upper stage are held by the locking plates 7 of the bricks 3 located at the lower stage so that they cannot slide down, it is possible to use the form 5 as shown in FIG. The lining can be constructed accurately. Lining layer 4
In the state in which the bricks 3 have been formed, the bricks 3 are in a state of restricting each other in the up, down, left, and right directions. In other words, since the bricks 3 are supported by each other under the pressing stress, the locking plate 7 is It is in an unnecessary state.

Then, when the furnace is operated, the locking plate 7 is burned down by the heat at that time, and the lining layer 4 is composed of only the bricks 3. FIG. 4 shows a third embodiment of claim 3.
It is an example, of which (A) is a sectional view showing construction,
(B) is a side view of a brick itself. In this embodiment, as shown in Fig. B, a locking plate 7 made of a burnable material is attached to the back surface of each brick 3 forming the dome portion 1 by an adhesive agent in a state of extending downward. Put it on each brick 3
A locking plate 7 made of a burnable material is preliminarily attached to the front surface of the above with an adhesive in a state of extending upward.

Then, as shown in Fig. A of the brick 3, the brick 3 is provided with a locking plate 7 on the back surface of the brick 3 located on the upper stage.
The downward extension of the bricks overlaps with the back surface of the lower bricks 3, and the front surface of the bricks 3 located in the upper row overlaps the upward extension part of the locking plate 7 of the bricks 3 located in the lower step, so that the bricks are sequentially stacked. . According to the third embodiment, since the bricks 3 located on the upper stage are caught by the bricks 3 on the lower stage by the front and rear locking plates 7, there is an advantage that the sliding down of the bricks 3 can be prevented more reliably. As in the other embodiments, the operation of the furnace burns out each locking plate 7.

FIG. 6 shows a fourth embodiment of the fourth aspect.
This is an example. Of these, Fig. (A) shows an example in which an appropriate number of through holes 8 are provided in a portion of the locking plate 7 that overlaps with the bricks 3, and Fig. B shows a locking plate. This is an example in which an appropriate number of recesses 9 are provided in a portion of 7 that overlaps with the brick 3. With this configuration, the area of adhesion of the adhesive to the locking plate 7 is increased, which has the advantage of improving the adhesive strength.

In the specific embodiments of the present invention represented by each of the above embodiments, the material of the locking plate 7 is not particularly limited.
It suffices that the strength that can prevent the bricks 3 from sliding down and the property that the bricks 3 are burned down by the operation of the furnace are maintained. From the standpoint of economy and ease of processing and handling, for example, hard plastic such as vinyl chloride or wood such as oak board is preferable.

The adhesive used to attach the locking plate 7 is also not particularly limited, and it is sufficient if the adhesive strength is such that the locking plate 7 does not peel off during stacking. For example, resin type,
Vinyl-based, rubber-based adhesives can be used.
You may use double-sided adhesive tape. Above all, a resin adhesive such as an epoxy resin or a phenol resin is preferable from the viewpoint of adhesion to bricks.

[0020]

As described above, according to the present invention, since the locking plates attached to the bricks forming the dome portion allow the bricks to be stacked without slipping off, The inner lining of the dome can be accurately constructed without the use of a formwork or hooking metal.

Therefore, according to the present invention, there is an effect that the lining work by brick-laying the dome portion in the furnace can be performed quickly and easily. Further, for example, in the case of a metal plate locking plate, since the coefficient of thermal expansion of the brick and the locking plate are different, there is a problem such as loosening in the brick stacking structure, but since the locking plate is burned out in the present invention. There is no such problem. Furthermore, since it is only necessary to attach a small piece of the locking plate to the brick, it is economically preferable compared to the conventional method of giving a form along the inner surface of the lining at the time of construction, and moreover, a skilled technician is required. You don't even need it.

[Brief description of drawings]

FIG. 1 is a diagram showing a lining process according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a single brick used in the first embodiment.

3A is a partially enlarged view of FIG. 1, and FIG. 3B is a side view of a brick alone.

FIG. 4 is a diagram showing a second embodiment, (A) is a diagram showing a construction process, and (B) is a side view of a brick alone.

FIG. 5 is a diagram showing a third embodiment, (A) is a diagram showing a construction process, and (B) is a side view of a brick alone.

FIG. 6 is a diagram showing a fourth embodiment.

FIG. 7 is a diagram showing a conventional example.

[Explanation of symbols]

 1 Dome Part 2 Outer Shell 3 Brick 4 Lining Layer 7 Locking Plate 8 Through Hole 9 Recess

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazushi Iwaki 1-3-1, Niihama, Arai-cho, Takasago, Hyogo Prefecture Harima Ceramic Co., Ltd. (72) Reiji Kozuki 1-3-3, Niihama, Arai-cho, Takasago, Hyogo No. 1 Harima Ceramic Co., Ltd.

Claims (4)

[Claims] 1. A method of lining a plurality of bricks in sequence from bottom to top on the inner surface of a dome portion in a furnace, and lining the dome portion. The locking plate consisting of is attached in a state of extending downward, and these bricks are sequentially stacked so that the downward extending portion of the locking plate of the upper brick overlaps the back surface of the lower brick. The method of lining bricks in the dome of a furnace characterized by the following. 2. A method of lining a plurality of bricks in order from the bottom to the top on the inner surface of the dome portion, and lining the dome portion. Before lining the dome portion, the front surface of each brick is made of burnable material. Attach the locking plate in advance so that it extends upward, and stack these bricks in sequence so that the upper extension of the locking plate of the lower brick overlaps the front of the upper brick. A method for lining bricks in a dome in a furnace characterized by: 3. A method of stacking a plurality of bricks in order from bottom to top on the inner surface of a dome portion for lining, wherein before the dome portion is lined, the back surface of each brick is made of burnable material. The locking plate is attached in a state of extending downwards, and the locking plate made of a burnout material is attached in a state of extending upwards in the front surface, and these bricks are attached to the back surface of the lower brick. The lower extension of the locking plate of the upper brick is stacked, and the upper extension of the locking plate of the lower brick is stacked so that the front surface of the upper brick is stacked. Method for lining bricks in the dome of a furnace. 4. The "claim 1" to the "claim 3" according to any one of claims 1 to 3, wherein a portion of the locking plate to be bonded to a brick is
A brick lining method for a dome portion in a furnace, characterized in that a through hole or a recess opening toward the brick is formed.