JPS59219690A - Method of filling ceramic fiber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention fills a narrow gap in a fireproof structure with ceramic fiber! The present invention relates to an improvement in the method of

When the refractory structures of various industrial furnaces are used at high temperatures, shrinkage of the refractory material 1 may occur (thereby causing cracks, gaps 2 such as cracks, etc.) as shown in FIG.

Further, as shown in FIG. 2, when a gap 4 is created in advance for the purpose of absorbing the thermal expansion opening 1 of the refractory 3, it is necessary to open the gap 4 in advance.

Furthermore, as shown in Fig. 3, there is a case where a gap 6 is created between the laminated ceramic layers (in Figs. 1 to 3, 18 is a heat insulating layer, 19L is an iron skin ).

These III)I gases on the high-temperature side, such as (f) furnace gas and hot air, can enter the back side through gaps existing in the large structure, such as cracks and expansion margins, causing damage to the back structure, heat loss, etc. Invite.

- In order to prevent the above-mentioned disadvantages, a method is used in which ceramic fibers are filled into the gaps existing in the refractory structures when newly installing, repairing, or operating equipment having these refractory structures.

Conventional filling force methods generally involve pushing bulk ceramic fibers using a thin cup with a diameter smaller than the width of the gap, or pushing blanket-shaped ceramic fibers little by little along the gap. In this case, the former was filled once because the diameter of the ceramic fiber was small, and the latter was filled once because the width of the ceramic fiber was smaller than the width of the gap to make it easier to push in, or even if it was large, it could only be made a little larger. Part or all of the ceramic fibers were easily removed.

Further, the filling tends to be uneven, and the filling operation requires a large amount of space and labor. This drawback is more pronounced as the gap is narrower and deeper, so in practice, gaps with a width of 5 mm or less are often not filled.

The present invention advantageously solves these drawbacks, facilitates the filling process, and enables the filling to be adjusted to a uniform density, thereby improving filling III'! This is an extremely excellent filling method that prevents the ceramic fibers from falling out.

That is, the gist of the present invention is that, when filling the gap of a (+)+lIN fire structure with ceramic fiber η1, a laminate in which a thin plate is arranged on one or both sides of a layer of ceramic fiber that is thicker than the gap width is made to have air permeability. A filler thinner than 1 tJ of the gap formed by vacuum-sealing a bag with no seal is inserted into the gap described above, and then the bag is opened to restore the thickness of the ceramic fiber. Filling method and (2) When filling a gap in a regular fire structure with ceramic fiber, one or both opposing surfaces of the ceramic fiber layer of the non-ventilated bag for storing the ceramic fiber layer thicker than the gap width. Thin plate 1゛f without ventilation
A filling body thinner than the gap width obtained by sealing one layer of the ceramic fibers under reduced pressure in a bag formed with a thin layer is inserted into the gap, and then the bag is opened to restore the thickness of the one layer of ceramic fibers. The characteristic lies in the method of filling ceramic fiber.

The present invention will be explained in detail below.

Gap in the fireproof structure shown in FIGS. 1 to 3 [IJ9 gap 2.
4.6 When filling the ceramic fibers into the ceramic fibers, the method (1) of the present invention, as shown in FIG. 4 or FIG. Or a laminate 20 with thin plates 8 on both sides
is placed in a flexible, non-breathable bag, for example, a polyethylene bag 9 having the shape shown in FIG. .10' is sealed, for example by welding, and then side 1
1. From the open end of 11', the inside of the bag is forcibly degassed using, for example, a vacuum pump to reduce the pressure. Due to this reduced pressure, the inner bag laminate 20
The fiber thickness of decreases. Next, the sides 11 and 11' are sealed, and the laminate 20 is vacuum-sealed with a flexible non-breathable bag 9 to obtain a packed body thinner than the gap nE 9.

The thickness of the ceramic fiber in this filling body is 1.
As shown in No. 714, if the thickness is less than the maximum retractable thickness, it can be arbitrarily adjusted by the degree of forced degassing (decompression).

The maximum ijf shrinkage thickness is the thickness of the ceramic fiber after deformation when the inside of the bag is vacuumed.This value varies depending on the type and density of the ceramic fiber, but it is usually in an approximately unloaded state at atmospheric pressure as shown in Figure 7. Thickness of tll ~ 115
That's about it.

In addition, the thin plate 8 makes the surface of the filling body smoother, and the inserted +n
In addition to reducing friction with the iJ large structure, insertion 11
! This reduces the bending of the ceramic fiber 7 of 1, making it easier to handle, and reducing the gap 2.4.6 shown in Figure 1.2.3.
It serves as a guide when inserted into the machine.

Therefore, the material of the thin plate 8 is, for example, organic thin plate such as Mino paper, cardboard, plastic thin plate, PVC plate, metal thin plate such as aluminum plate, copper plate, steel plate, inorganic thin plate such as glass plate, alumina plate, or organic or inorganic thin plate. The thin plate referred to in the present invention can be used as long as it is manufactured from metallic fibers and can exhibit the above-mentioned role lj+.

When arranging thin plates on both sides of the ceramic fiber, the thin plate 8 is bent as shown in FIG. 8 and the ceramic fiber 7 is placed between the thin plates, or two sheets are used as shown in FIG. 9. In particular, a thin plate 8.8' in which ceramic fiber 7 is arranged by bending one end of the thin plate 8.8' is shown in FIG.
Good workability can be obtained when filling the gap 2.6 as shown in FIG. 3. , (In FIG. 9, t
.

-1, > 1.2. ) The method (2) of the present invention is such that the thin plate 8 in the laminate 20 illustrated in FIG. 4.5.9 is
When producing a bag or bag 9 in which a flexible non-breathable bag 9 is pre-attached to form a non-breathable thin plate portion, for example, the bag 9 may be made of the same material as the bag 9 and made thicker. Less likely to break your back,
A thin plate portion with no air permeability is formed, a bag is prepared, and without preparing the above-mentioned laminate 20, 7 layers of ceramic fibers thicker than the gap 1 are decompressed using a bag having a −1− recording plate portion. A filling body thinner than the sealed gap [1] is used.

In the method of the present invention, the filling body obtained in Section 2 is used in Section 1.2.3.
Insert into the gap 2.41.6 of the refractory structure in Figure 1. Next, after inserting it to the specified position, open the bag 9 that encloses the laminate 20 of the ceramic fiber 7 and the thin plate 8, and open the inside of the bag.
Ceramic fiber 7 that had been deformed by returning it to
The thickness of the refractory structure is restored, and the gaps 2.4.6 of the refractory structure are uniformly and densely filled.

One way to open the bag is to tear part of the bag, but another method is to leave it open and use it as a decoy.
! A method of melting or burning the bag using the hot air of I may also be used.

This will be explained below using examples.

Example 10.11 Inner diameter 1,800 mm, length 12
The ring stacking of bricks 14 as shown in FIG.
L (when filling ceramic fibers into 15 1JU sections of 42 bricks intermittently formed in the hand direction, the thickness is 12.5+n as shown in Fig. 12).
A laminate 20 is made by cutting +o ceramic fibers 16 into 8 fan shapes in the circumferential direction and sandwiching them between 0.3m+n PVC plates 17 in the same fan shape to match the cross section of the brick base structure. Approximately 0.05kg/polyethylene bag
The filling body, which has been decompressed and sealed to c + n2 and deformed to a thickness of approximately 5 mm, is inserted into the 15-mm gap with a gap width of 10 mm. The mink fiber was made into III-IIk, and the ceramic fiber was filled into the bulge of the brick.

In the method of the present invention, an efficiency improvement of 175% in working time and 1/10 in required man-hours was recorded compared to the conventional method.

Incidentally, FIG. 13 shows a front view of FIG. 12.

As described in detail, the present invention relates to a method for filling gaps in a fireproof structure with ceramic fibers.

This is an extremely excellent filling method that facilitates the filling process, allows adjusting the filling to a uniform predetermined density, and makes it easier for the filled ceramic fibers to come out.

[Brief explanation of drawings]

Figures 1 to 3 are explanatory diagrams of the gap in the +l1i4 large object structure, Figures 4.5 and 8.9 are explanatory diagrams of an example of a JA layer consisting of ceramic fibers and thin plates, and Figure 6 is an explanatory diagram of the i'J flexure. Fig. 7 is an explanatory diagram of an example of the form of a bag with no air permeability;
Figures 111, 12, and 13 are explanatory diagrams of an embodiment of the ceramic fiber filling method of the present invention. ■...1111. ] Otsuki, 2... Gap, 3Φ... Refractory, 4... 1 ((Gap, 5... Ceramic fiber, 6... Gap, 7... Ceramic fiber/to
, 8.8'...thin plate, 9φ...14 (flexible non-breathable bag, 10.10'...side of pot bag, 11.1i...
Side of bag, 12・φΦ hot air pipe, 13...insulation layer, 14・
φ・i/Nga, 15-... 11 Shingyudai, 18 Φ ceramic fiber, 17... Salt plywood board, 18... Heat insulation layer, 19... Iron skin, 20... Laminated body. Patent applicant: Nippon Steel Corporation stock *Representative: Masa Inoue, patent attorney Figure 1 Figure 2 Figure 3 Parent\

Claims (1)

[Claims] 1. When filling the gap in the 4-fire structure with ceramic fibers, a laminate in which a thin plate is arranged on one or both sides of a layer of ceramic fiber that is thicker than the gap rlJ is stored in a non-ventilated bag. Then, the inside of the bag is depressurized, a hole is made in the laminate inside the bag, and a filler thinner than the gap rb is inserted into the gap in the fireproof structure described in 2.Then, the bag is opened and a layer of ceramic fiber is inserted into the gap in the fireproof structure. A ceramic fiber filling method characterized by restoring thickness. 2. 1 When filling the gaps in the fireproof structure with ceramic fibers, one layer of ceramic fibers thicker than the gap 1 is placed in a thin plate so that when the one layer of ceramic fibers is stored, a thin plate part is placed on one or both sides of the one layer of ceramic fibers. The gap 11 is formed by storing the laminate in a pre-formed bag with no air permeability, then reducing the pressure inside the bag, and sealing the laminate inside the bag.]
A method for filling ceramic fibers, which includes inserting a thinner filling body into the gap of a structure containing 1n11, opening the bag with 0 and 1, and restoring the thickness of the ceramic fiber layer.