JPH1068593A - Casting execution method for monolithic refractory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a casting execution method of monolithic refractories which realizes a drastic rationalization by enabling the execution of one peripheral section in a day. SOLUTION: In a method for cast execution of a continuous refractory wall by casting castable refractories in a mold 5, a casting region where the castable refractories are cast are divided into four sections and separating portions 6 are formed at the borders of the sections so as to prevent the occurrence of random cracks which may be caused as the castable refractories 4 are hardened and dried. Refractory bricks 7 which can be remained in place after the execution are placed ton the separating portions 6. Subsequently, a mold 5 is mounted and the castable refractories 4 are cast into the mold 5. When the castable refracties 4 are hardened, only the mold 5 is removed, while the refractory brick 7 are remained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for pouring an irregular-shaped refractory (for example, castable refractory) as a lining refractory layer of an industrial kiln, for example.

[0002]

2. Description of the Related Art Heretofore, when casting castable refractories as a lining of a large industrial kiln, the castable refractories are cast into a plurality of areas and divided into sections. This is because when castable refractories are cast at once on the entire peripheral surface, the castable refractories become an integral part without any cut-off points.
This is because there is a possibility that cracks may be randomly generated in indefinite portions and quality may be deteriorated.

FIG. 5 shows an elevational section of a fluidized bed incinerator 1.
In this furnace 1, a heat insulating board 3 is provided on the inner peripheral surface of the outermost steel shell 2.
Are adhered, and a castable refractory 4 is cast and solidified on the inner peripheral side of the heat insulating board 3. Conventionally, the cross section A
The construction of the -A part is performed as follows.

[0006] That is, as shown in FIG. 6 (a), when the attachment of the heat insulating board 3 is completed, the circumferential area is divided into four on the first day.
The mold 5 is divided, and the mold 5 is placed in two areas that are diagonally opposed to each other, and the castable refractory 4 is poured into the space inside the mold 5. When the pouring is completed, curing is performed as it is, and the castable refractory 4 is hardened.

On the second day, after confirming that the castable refractory 4 poured in on the first day has hardened, the frame is removed, and FIG.
As shown in (b), the formwork 5 is installed in the remaining area, the castable refractory 4 is poured in the same manner as described above, and the hardening of the castable refractory 4 is completed.

[0006]

However, according to the conventional construction method, after attaching the heat insulating board (two layers), first, a castable refractory for a half circumference is constructed on the first day, and then the second day is constructed. In order to construct the castable refractory for the other half of the circumference, it took two days to construct the castable refractory for one revolution (construction height is 800 to 850 mm). Therefore, in the conventional construction method, reduction of the construction time cannot be said to be sufficient.

In the present invention, taking the above circumstances into consideration, one round corresponds to one.
It is an object of the present invention to provide a method for pouring an irregular-shaped refractory which can be constructed in a day and can achieve a great rationalization.

[0008]

SUMMARY OF THE INVENTION According to the present invention, when a continuous refractory wall is constructed by pouring an amorphous refractory into a mold and waiting for hardening, the casting area of the irregular refractory is divided into a plurality of areas. At the boundary, an edge portion for avoiding the generation of random cracks due to the hardening of the irregular-shaped refractory was set, and the edge portion was provided with a fixed-type refractory edge member capable of being left after construction. The above is characterized by installing a formwork and pouring irregular shaped refractories.

In this construction method, an edge portion is set from the beginning, and a fixed refractory edge member is disposed there. Then, the mold is placed on the entire surface, and the irregular refractory is poured into the entire surface in a lump, and the curing is awaited. After hardening, the fire-resistant edging member has a fire-resistant function, so it is left as it is, and only the form is removed to complete the construction.

When the present invention is applied to form a refractory wall on the inner peripheral surface of a kiln, the entire inner periphery is divided into a plurality of parts, and the above-mentioned refractory rim member is disposed at the rim of the boundary. Then, a mold for the entire circumference is installed and an irregular-shaped refractory is poured therein (claim 2).

[0011] In this case, the effectiveness can be particularly exerted when the kiln is a long furnace represented by a circular furnace, a square furnace, and a tundish.

Further, it is desirable that at least two or more rim portions are provided in the circumferential direction.

Further, as the fire-resistant border member, a fire-resistant brick or a fire-resistant panel can be used.
6).

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective sectional view showing a state in the middle of construction of a portion corresponding to a section AA of the fluidized bed incinerator shown in FIG. 5 in the present invention, and FIG. 2 is a sectional view. In the construction method according to the embodiment of the present invention, in forming a continuous refractory layer on the inner peripheral surface side of the heat-resistant board 3, the casting region of the castable refractory 4 (in this case, the entire circumference for a predetermined height) is set to 4. The castable refractory 4 is divided into two, and the boundary is set as an edged portion 6 for avoiding the generation of random cracks accompanying the curing and drying of the castable refractory 4.

[0015] A refractory brick 7 is disposed in each edge portion 6 as a fixed refractory edge member that can be left after the construction, and a formwork 5 is installed on the entire periphery thereof to form the castable refractory 4. , Into the entire peripheral space in the mold 5. In this case, three refractory bricks 7 are arranged side by side so that they can be stacked. When the castable refractory 4 is hardened, the refractory brick 7 is left as it is, and only the form 5 is removed to complete the construction.

According to this method, the castable refractory 4 can be cut off at the position where the refractory brick 7 is disposed without dividing the castable refractory 4, so that the castable refractory 4 is poured all over the entire surface. Can be constructed. Therefore, the construction can be completed in one day, compared with the conventional construction that took two days.

As shown in FIG. 3, a refractory panel 8 can be used instead of the refractory brick. The construction method of the present invention can be particularly effective when the kiln is a long furnace represented by a circular furnace, a square furnace, and a tundish, but can be applied to other kilns.

In addition to the inner peripheral surface of the kiln, the present invention can be applied to a flat surface as shown in FIG. In FIG. 4, a refractory panel 8 (which may be a refractory brick) is provided at an appropriate position as an edge of the castable refractory 4 in this case as well. Reference numeral 9 denotes a bolt for supporting the mold 5, which has a configuration in which the mold 5 is attached to the bolt 9 using nuts 10 and 10. In addition, FIG.
In the embodiment shown in FIGS. 2 and 3, the fixed form such as the mold 5 is not specified.
It is needless to say that the fixed form shown in FIG.

[0019]

As described above, according to the construction method of the present invention, the heat-resistant marginal member which can be left from the beginning is disposed at the marginal portion, so that it can be cast without dividing and constructing. The refractory can be trimmed, and the refractory can be poured into the entire surface at once. Therefore, the process which conventionally took two days to complete can be completed in one day, and the construction time can be shortened and rationalization can be achieved.

When a fire-resistant wall is formed on the inner peripheral surface of a kiln by applying the present invention, the entire inner periphery is divided into a plurality of parts and a fire-resistant rim member is provided at a rim of the boundary. By that
Irregular refractories for the entire circumference can be poured at once (claim 2). In that case, the effectiveness can be particularly exhibited when the kiln is a long furnace such as a circular furnace. Furthermore, if at least two or more rim portions are provided in the circumferential direction, it is effective in performing the rim function (claim 4). Further, when a fire-resistant brick or a fire-resistant panel is used as the fire-resistant border member, it is advantageous in terms of cost (claims 5 and 6).

[Brief description of the drawings]

FIG. 1 is a perspective sectional view used for describing a construction method according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part used for describing a construction method according to the embodiment of the present invention.

FIG. 3 is a sectional view of a main part used for describing a construction method according to another embodiment of the present invention.

FIG. 4 is a sectional view of a main part used for describing a construction method according to yet another embodiment of the present invention.

FIG. 5 is a sectional view of a kiln to be constructed here.

FIG. 6 is a sectional view used to explain a conventional construction method;
(A) is a figure which shows the construction content of the 1st day, (b) is a figure which shows the construction content of the 2nd day.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid bed incinerator 2 Iron shell 3 Insulation board 4 Castable refractory (irregular refractory) 5 Formwork 6 Edge part 7 Firebrick (fireproof edge member) 8 Fire panel (fireproof edge member) 9 Bolt 10 Nut

Claims (6)

[Claims] 1. A method of pouring a continuous refractory wall into a mold by casting an amorphous refractory into a formwork, wherein the casting area of the amorphous refractory is divided into a plurality of areas, and a fixed form which can be left at the boundary after the application. A method for pouring an irregular-shaped refractory, characterized by disposing a refractory edging member, and then installing a formwork and pouring the irregular-shaped refractory. 2. When the refractory wall is formed on the inner peripheral surface of the kiln, the entire inner periphery is divided into a plurality of portions, and the refractory edging member is disposed at an edging portion of the boundary. 2. The method according to claim 1, wherein the irregularly shaped refractory is poured by setting the formwork of (1). 3. The casting method according to claim 2, wherein the kiln is any one of a circular furnace, a square furnace, and a long furnace represented by a tundish. 4. The casting method according to claim 2, wherein at least two or more of the edge cut portions are provided in the circumferential direction. 5. The casting method according to claim 1, wherein a refractory brick is used as the refractory border member. 6. The casting method according to claim 1, wherein a refractory panel is used as the refractory border member.