JP2022150907A - Refractory tile and protective refractory tile system - Google Patents

Abstract

To provide a technology of realizing a refractory tile with higher durability than before.SOLUTION: A refractory tile comprises two protection parts and a fixing part provided between the two protection parts. The two protection parts have a shape that surrounds a part of the outer peripheral surface of each of two adjacent members to be protected and extends in an extending direction along each outer peripheral surface. Also, the fixing part connects both protection parts, and is provided with a structure for fixing to the member to be protected. In the refractory tile, the surface opposite to the surface facing the member to be protected is provided with a flat part extending from one protection part to the other protection part via the fixing part.SELECTED DRAWING: Figure 1

Description

This specification discloses technology related to fire-resistant tiles. In particular, a technique relating to a fire-resistant tile for protecting a plurality of members to be protected extending in parallel and a protective fire-resistant tile system using the fire-resistant tile is disclosed.

A fire resistant tile is disclosed in US Pat. The refractory tiles of Patent Document 1 are attached to water pipes arranged on the furnace wall of an incinerator with a boiler. Refractory tiles are attached to two adjacent water pipes to protect the water pipes from hot gases (corrosive gases). In the refractory tile of Patent Document 1, the surface of the refractory tile (surface on the side exposed in the furnace) has an arch shape along the outer surface of the water pipe. By making the surface of the refractory tile arch-shaped, the thickness of the central portion of the refractory tile (between adjacent water pipes) can be reduced.

JP 2017-106664 A

Arching the surface of the refractory tile along the outer surface of the water tube creates a recess in the central portion of the refractory tile. Therefore, when the refractory tile expands and contracts, stress concentrates on the central portion of the refractory tile, and the central portion is likely to be damaged. That is, the refractory tile of Patent Document 1 has a partial weakened portion, and it is difficult to improve durability. The present specification provides techniques for realizing fire resistant tiles that are more durable than conventional ones.

The refractory tiles disclosed herein can protect multiple parallel extending protected members. The refractory tile may comprise two guards and a fixed part between the two guards. The two protective parts may have a shape that surrounds a part of the outer peripheral surface of each of the two adjacent members to be protected and that extends in the extending direction along each outer peripheral surface. Moreover, the fixed part connects both protective parts, and may be provided with a structure for fixing to the member to be protected. In this refractory tile, the surface opposite to the surface facing the member to be protected may be provided with a flat portion extending from one protection portion to the other protection portion via the fixing portion.

Other refractory tiles are disclosed herein that are capable of protecting multiple parallel extending protected members. The refractory tile may comprise two guards and a fixed part between the two guards. The two protective parts may have a shape that surrounds a part of the outer peripheral surface of each of the two adjacent members to be protected and that extends in the extending direction along each outer peripheral surface. Moreover, the fixed part connects both protective parts, and may be provided with a structure for fixing to the member to be protected. with this fireproof tile. The structure for fixing the refractory tile to the member to be protected is an insertion hole into which the fixing member for fixing the member to be protected and the refractory tile is inserted. It's okay to be

Also disclosed herein is a protective refractory tile system using the refractory tiles described above. The protective refractory tile system may comprise two parallel extending protected members, a joint connecting the two protected members, and the refractory tiles described above. Further, in this protective refractory tile system, the connecting portion connecting the members to be protected and the fixed portion provided on the refractory tiles are fixed by a separate fixing member from the members to be protected and the refractory tiles. good.

1 shows a perspective view of the surface of a refractory tile; FIG. Fig. 2 shows a perspective view of the underside of the refractory tile; 2 shows a cross-sectional view along line III-III in FIG. 1; FIG. The perspective view of a to-be-protected member is shown. Fig. 3 shows a perspective view of a connecting bar; The figure explaining the installation procedure of a fireproof tile is shown. 7 shows a cross-sectional view along line VII-VII of FIG. 6; FIG.

The refractory tiles disclosed herein are used to protect multiple parallel extending protected members. That is, the refractory tiles are used to protect the members to be protected from the external high temperature environment. As a member to be protected, for example, a cylindrical pipe can be used. The shape of the pipe is arbitrary, and may be polygonal such as triangular, quadrangular, or circular. In addition, the piping can have wiring or the like installed therein and allow fluid to pass therethrough. When a fluid is passed through the piping, the fluid may be a gas such as air or gas, or a liquid such as water or a solvent. In particular, the refractory tiles disclosed in this specification can be suitably used to protect water pipes through which water flows. Specifically, the refractory tile can be used as the furnace wall of an incinerator with a boiler in which water pipes are arranged.

Refractory tiles may be made of ceramics. Examples of materials for refractory tiles include SiC, alumina, and mullite. In particular, the SiC material has high thermal conductivity, and even when the thickness of the refractory tile is increased, it is possible to suppress the decrease in thermal conductivity. In addition, by using a material with high thermal conductivity (SiC), temperature unevenness in the refractory tiles can be suppressed, and local stress (thermal stress) applied to the refractory tiles can be suppressed. An example of the SiC material is a material containing SiC as the main component (85% by mass or more) and a trace amount of SiO ₂ (15% by mass or less). Such a material has good oxidation resistance, can improve the durability (lifetime) of the refractory tile, and can reduce the frequency of replacement of the refractory tile. Specifically, by adjusting to 85% by mass or more of SiC, 15% by mass or less of SiO ₂ , an apparent porosity of 3% or more and 18% or less, and a bulk specific gravity of 2.6 or more and 2.9 or less, 10 to 60 W at 350 ° C. A thermal conductivity of about /m·k can be obtained. In addition, this material can suppress the weight increase rate in the oxidation resistance test to 0.1% or less, and can obtain high oxidation resistance.

Here, the test conditions for the oxidation resistance test are described. First, a sample (refractory tile) is heated in a steam atmosphere at 1050° C. for 50 hours, and the sample weight (W50) is measured. Thereafter, the sample is further heated in a steam atmosphere at 1050° C. for 25 hours (total heating time 75 hours), and the sample weight (W75) is measured. Then, the weight increase rate ΔW is calculated from the following formula (1).
Formula 1: ΔW = (W75-W50)/W50 x 100

The thickness of the refractory tile (the width of the front and back surfaces) is not particularly limited, but may be 10 mm or more and 25 mm or less. If the thickness of the refractory tile is 10 mm or more, the strength of the refractory tile itself is ensured, and high durability can be obtained. In addition, if the thickness of the refractory tile is 25 mm or less, the temperature difference between the front and back surfaces can be reduced, and temperature unevenness within the refractory tile can be suppressed. The thickness of the refractory tile may be 11 mm or more, 12 mm or more, 15 mm or more, 18 mm or more, or 20 mm or more. Also, the thickness of the refractory tile may be 20 mm or less, 18 mm or less, or 15 mm or less. The thickness of the refractory tile means the smallest width of the front and back surfaces of the refractory tile.

As noted above, refractory tiles are used to protect a plurality of parallel extending protected members. The refractory tiles are provided with two protection portions surrounding a part of the outer peripheral surface of each of two adjacent members to be protected among the plurality of members to be protected, and provided between the two protection portions. There may be a fixing part connecting the protective part. The protection part may have a shape extending in the extending direction along the outer peripheral surfaces of the two members to be protected. In other words, the back surface of the protection portion (the surface facing the member to be protected) may have the same shape as the outer peripheral surface of the member to be protected. For example, when the member to be protected is a cylindrical pipe, the rear surface of the protective portion may be arcuate. On the other hand, the surface of the protection portion (the surface opposite to the surface facing the member to be protected) may be flat. That is, a flat portion extending from one protection portion to the other protection portion via the fixing portion may be provided on the surface opposite to the surface facing the member to be protected. If the surface of the protective portion is flat (by providing the flat portion), local stress concentration can be suppressed when the protective portion (refractory tile) thermally expands. In addition, if the surface of the protective portion is flat, it is possible to suppress adhesion of burning materials and the like to the surface of the protective portion, thereby facilitating maintenance of the protective portion.

A protruding portion may be provided on the rear surface of the protective portion. A plurality of protrusions may be provided at intervals in the circumferential direction of the member to be protected. Also, a plurality of projecting portions may be provided at intervals in the extending direction of the member to be protected. By providing the projecting portion on the rear surface of the protective portion, it is possible to secure a gap between the fireproof tile and the member to be protected when the fireproof tile is attached to the member to be protected. That is, when the refractory tile is attached to the member to be protected, it is possible to prevent the entire back surface of the refractory tile (protection portion) from coming into contact with the member to be protected. As a result, when fixing the refractory tile to the member to be protected, it is possible to secure a space between the refractory tile and the member to be protected, in which a bonding material such as cement is interposed.

The fixing part connects the two protection parts and has a structure for fixing the fixing part to the member to be protected (structure for fixing the refractory tile to the member to be protected). That is, the refractory tile is fixed to the member to be protected by fixing the fixing portion to the member to be protected. As a structure for fixing the refractory tile to the member to be protected, there is an insertion hole for inserting the fixing member. The fixing member may be separate from the fixing portion (refractory tile) and the member to be protected. By providing an insertion hole in the fixing part, a connecting part is provided between two protected members to connect them, and a mounting member having a through hole is fixed to the connecting part, so that the through hole of the mounting member and the fixing part are connected. By inserting the fixing member into the insertion hole, the member to be protected and the refractory tile can be fixed.

The insertion holes may be provided on both sides of the fixed portion in the extending direction described above. The insertion holes provided on both sides in the extending direction may both be recesses having bottoms. That is, the insertion holes on both sides in the extending direction may not communicate with each other. When fixing a plurality of refractory tiles (for example, a first refractory tile and a second refractory tile) in the extending direction of the member to be protected, an insertion hole (first insertion hole) at one end in the extending direction of the first refractory tile (first insertion hole) and a second A common fixing member may be inserted into the insertion hole (second insertion hole) at the other end in the extending direction of the refractory tile. In this case, first, a fixing member longer than the depth of the first insertion hole is inserted into the first insertion hole of the first refractory tile and the through hole of the mounting member (member to be protected) to attach the first refractory tile and the member to be protected. fixed. Next, the second insertion hole of the second refractory tile is fitted into the fixing member protruding from the first insertion hole. After that, a fixing member longer than the depth of the first insertion hole is inserted into the first insertion hole (insertion hole at one end in the extending direction) of the second refractory tile and the through hole of the mounting member. By repeating this operation, a plurality of fireproof tiles can be fixed in the extending direction of the member to be protected. When fixing the refractory tile to the member to be protected, a bonding material such as cement may be applied to the back surface of the refractory tile. The refractory tile can be firmly fixed to the member to be protected.

The shape of the back surface of the fixing portion is not particularly limited, but the surface may be flat. In this case, the planar portion may be provided in a range from one of the two protective portions to the other protective portion via the fixed portion. That is, one plane portion may be formed by two protection portions and a fixing portion. The fixing part may be separate from the protection part, or may be integrated with the protection part. That is, the two protective parts may be connected by the protective part and the separate fixed part, or the fixed part and the protective part may be integrally molded. If the fixed part and the protective part are integrally molded, there is no clear boundary between them. Therefore, the fixing part also functions as a protection part for protecting the member to be protected. Moreover, the side surface of the fixed portion may also be provided with a projecting portion. The contact area between the refractory tile and the fixed part can be reduced. In addition, when the fireproof tile is fixed to the member to be protected, a gap is ensured between them by providing the projecting portion on the rear surface of the protective portion and/or the side surface of the fixing portion. When a bonding material is used to fix the refractory tile to the member to be protected, a sufficient gap for the bonding material to exist between the refractory tile and the member to be protected can be secured.

The extension direction length of the fixing portion may be shorter than the extension direction length of the protection portion. For example, in the extending direction described above, one end surface of the fixing portion may be located in a recessed position with respect to one end surface of the protection portion, and the other end surface of the fixing portion may be located in the same plane as the other end surface of the protection portion. In this case, a flat surface is formed by the end surface of the fixing portion and the end surface of the protective portion at the other end in the extending direction. Therefore, the insertion hole provided at the other end of the fixing portion is provided on the flat surface. In other words, the insertion hole of the other end of the fixing part is provided in the other end surface of the fireproof tile.

The insertion hole provided in the flat surface is preferably the second insertion hole in the example described above. As described above, the second insertion hole is fitted with the fixing member protruding from the first insertion hole of another refractory tile (first refractory tile). Therefore, it is more difficult to align the insertion hole and the fixing member in the work of fitting the second insertion hole into the fixing member than in the work of inserting the fixing member into the first insertion hole. If the second insertion hole is provided on the flat surface (end face in the extending direction of the refractory tile), it becomes easier to visually recognize the fixing member, and the work of fixing the refractory tile to the member to be protected can be facilitated. In addition, by making the length of the fixing portion in the extending direction shorter than the length of the protecting portion in the extending direction, one end face of the fixing portion of the first fire-resistant tile, the protecting portion of the first fire-resistant tile, and the second fire-resistant tile The other end surface of the fixing portion can surround the attachment member of the member to be protected. As a result, the mounting member of the protected member can also be protected from the high temperature environment.

The shape of the insertion hole is not particularly limited, but may be circular or non-circular such as rectangular. Circular insertion holes are easy to manufacture, and non-circular insertion holes can prevent relative rotation between the refractory tiles and the member to be protected when they are fixed to each other.

The refractory tile 10 will be described with reference to FIGS. 1 to 3. FIG. As shown in FIGS. 1 and 2, the refractory tile 10 includes two protective portions 5 for protecting members to be protected (a water pipe structure 30 described later with reference to FIG. 4) extending in the Z direction, and two A fixing part 12 connecting the protection part 5 is provided. The fixing part 12 is provided between the two protective parts 5 . The protective portion 5 and the fixed portion 12 are integrally molded. Therefore, it can be considered that the fireproof tile 10 is formed with two protective portions 5 , and the fixing portion 12 is formed between the protective portions 5 , 5 . The refractory tile 10 is made of a material mainly composed of SiC and further containing SiO ₂ . Specifically, the refractory tile 10 is made of a material containing 89% by mass of SiC and 11% by mass of SiO ₂ . The fireproof tile 10 is adjusted to have an apparent porosity of 9%, a bulk specific gravity of 2.75, and a thickness of 12 mm.

The back surface 8 of the protection part 5 (the surface facing the water tube structure 30: the surface in the +X direction) is arc-shaped, and the arc extends in the extension direction (Z direction) of the member to be protected. The surface of the protective portion 5 (the surface opposite to the surface facing the water tube 30: the surface in the -X direction) is a common surface with the surface of the fixing portion 12 . A plane is formed by a part of the surfaces of the two protective portions 5 and the surface of the fixed portion 12 . That is, the surface of the refractory tile 10 is provided with a plane portion 4 extending from one protective portion 5 to the other protective portion 5 via the fixing portion 12 . A plurality of projecting portions 16 are provided on the back side of the refractory tile 10 (the back surface 8 of the protective portion 5 and the side surface of the fixing portion 12). The projecting portions 16 are arranged side by side at intervals in the Z direction. The protruding portions 16 are also formed side by side at intervals in the circumferential direction (Y direction) of the member to be protected (see FIG. 7).

As shown in FIG. 3 , insertion holes 14 and 22 are provided on both end surfaces of the fixed portion 12 in the Z direction. The insertion holes 14 and 22 are structures for fixing the refractory tiles 10 to water pipes 30, which will be described later. Each insertion hole 14, 22 has a bottom and is independent of each other. That is, the insertion hole 14 and the insertion hole 22 are not in communication. The shape of each insertion hole 14, 22 is rectangular (non-circular). Also, the side walls of each insertion hole 14, 22 are inclined, and the size of each insertion hole 14, 22 increases from the bottom toward the opening.

The length of the fixed portion 12 in the Z direction is shorter than the length of the protective portion 5 in the Z direction. Specifically, one (+Z direction) end surface 18 of the fixing portion 12 is provided at a position (−Z side of the end surface 6) recessed with respect to one end surface 6 of the protective portion 5 (see also FIG. 2). reference). On the other hand, the other (−Z direction) end surface 20 of the fixed portion 12 is located on the same plane as the other end surface 2 of the protective portion 5 . The end faces 2, 20 are each flat. Therefore, the end surfaces 2 and 20 can be regarded as forming one flat surface 24 and the insertion hole 22 can be regarded as being provided in the flat surface 24 .

The water tube structure 30 will be described with reference to FIG. The water tube structure 30 includes a first water tube 30a, a second water tube 30b extending parallel to the first water tube 30a, and a first connecting portion 32 connecting the first water tube 30a and the second water tube 30b. there is The first connecting portion 32 is fixed to both the water pipes 30a and 30b. The water pipes 30a, 30b and the first connecting portion 32 constitute one set, and the refractory tile 10 is fixed to the set of the water pipes 30a, 30b and the first connecting portion 32. As shown in FIG. A mounting member 34 for mounting the fireproof tile 10 is fixed to the first connecting portion 32 . A plurality of mounting members 34 are provided at intervals in the extending direction of the water pipes 30a and 30b.

A through hole 36 is provided in each mounting member 34 . The shape of the through hole 36 is rectangular. The refractory tile 10 is fixed to the water tube structure 30 using the through holes 36 . That is, the refractory tile 10 is fixed to the side of the water tube structure 30 on which the mounting member 34 is provided. A refractory tile 10 is positioned between each mounting member 34 . When the refractory tile 10 is fixed to the water pipe structure 30, the refractory tile 10 surrounds a part of the outer peripheral surface of the water pipes 30a and 30b (the outer peripheral surface on the side where the mounting member 34 is provided). A second connecting portion 33 is also fixed to the water pipes 30a and 30b. The second connection 33 is fixed to another set of water pipes. The mounting member 34 is not fixed to the second connecting portion 33 .

FIG. 5 shows a connection bar (fixing member) 40 for fixing the fireproof tile 10 and the water tube structure 30. As shown in FIG. The connecting bar 40 is a quadrangular prism plate material, and is a component separate from the fireproof tiles 10 and the water tube structure 30 . By inserting the connecting bar 40 into the through hole 36 and the insertion holes 14 and 22, the first connecting portion 32 of the water tube structure 30 and the fixing portion 12 of the fireproof tile 10 are fixed.

A procedure for fixing the refractory tiles 10 to the water tube structure 30 will be described with reference to FIG. Procedure (a) shows a state in which the fireproof tile 10a is attached to the first connecting portion 32 . Although illustration is omitted, in the state of procedure (a), the connecting bar 40 is inserted into the insertion hole 22 provided in the flat surface 24 of the refractory tile 10a and the through hole 36 of the mounting member 34 (Fig. 3 to 5). On the other hand, the connecting bar 30 is not inserted into the through hole 14 provided in the end surface 18 of the fixed portion 12 . Therefore, in the state of procedure (a), the work of fixing the fireproof tiles 10a to the water tube structure 30 is not completed.

As shown in procedure (b), in order to fix the refractory tile 10a to the water pipe structure 30, the connecting bar 40 is inserted into the through hole 36 and the insertion hole 14 of the refractory tile 10a. As a result, the fixed portions 12 are fixed to the mounting members 34 at both ends in the extending direction of the fireproof tile 10a. As a result, the refractory tiles 10a are fixed to the water tube structure 30. FIG. Procedure (b) is simply inserting the connecting bar 40 into the through hole 36 and the insertion hole 14 . Therefore, the connecting bar 40 can be easily inserted deep into the insertion hole 14 . As a result, the refractory tiles 10a can be reliably fixed to the water tube structure 30. As shown in FIG. Also, as shown in procedure (b), the length of the connecting bar 40 is longer than the depth of the insertion hole 14 . Therefore, even after the refractory tile 10a is fixed to the water pipe structure 30, the connecting bar 40 protrudes from the insertion hole 14 of the refractory tile 10a and the through hole 36 of the fixing member 34.

Next, the refractory tile 10b is fixed to the water tube structure 30. As shown in FIG. First, as shown in procedure (c), the connection bar 40 is fitted into the insertion hole 22 provided in the fixing portion 12 of the fireproof tile 10b. The insertion hole 22 is provided in the flat surface 24 of the refractory tile 10b. Therefore, when inserting the insertion hole 22 into the connection bar 40, the positions of the insertion hole 22 and the connection bar 40 can be easily visually recognized. Moreover, the side wall of the insertion hole 22 is inclined. Therefore, the insertion hole 22 can be fitted into the connecting bar 40 in a state where the fireproof tile 10 is slanted with respect to the first connecting portion 32 .

The end surface 18 of the fixing portion 12 is provided at a position recessed from the end surface 6 of the protective portion 5 . In other words, the end face 6 projects with respect to the end face 18 . Therefore, when the refractory tile 10b is attached to the water pipe structure 30, the periphery of the fixing member 34 is surrounded by the end surface 18 of the refractory tile 10a, the protective portion 5 of the refractory tile 10a, and the flat surface 24 of the refractory tile 10b.

Next, as shown in procedure (d), the connecting bar 40 is inserted into the through hole 36 and the insertion hole 14 of the fireproof tile 10b. Procedure (d) is essentially the same operation as procedure (b) and provides the same advantages as procedure (b). Thereby, the fireproof tile 10b is fixed to the water tube structure 30. As shown in FIG. By repeating the steps (b) to (d), a protective refractory tile system 100 in which a plurality of refractory tiles 10 are fixed to the water tube structure 30 is completed. When fixing the refractory tiles 10 to the water pipe structure 30, the refractory tiles 10 are attached to the water pipe structure 30 in a state where the back surface of the refractory tiles 10 is coated with cement. Cement functions as a bonding material that bonds the refractory tiles 10 and the water pipe structure 30 . In addition, in FIG. 6, illustration of the cement is omitted for clarity of the drawing. The cement is filled in the gaps between the refractory tiles 10 and the water pipe structure 30 and the insides of the insertion holes 14 of the refractory tiles 10 (the gaps between the insertion holes 14 and the connecting bars 40).

Referring to FIG. 7, features of protective refractory tile system 100 are described. As shown in FIG. 7, a plurality of protrusions 16 are arranged on the back surface 8 of the refractory tile 10 at intervals in the circumferential direction of the water pipes 30a, 30b. The outer peripheral surfaces of the water pipes 30a and 30b are in contact with the projecting portion 16. As shown in FIG. Therefore, an appropriate space is provided between the water pipes 30a and 30b and the back surface of the refractory tile 10. FIG. A space filled with cement can be reliably secured between the refractory tile 10 and the water tube structure 30 . In addition, it is possible to suppress the relative displacement of the refractory tiles 10 and the water tube structure 30 .

Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. In addition, the technical elements described in this specification or in the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the techniques exemplified in this specification or drawings can simultaneously achieve a plurality of purposes, and achieving one of them has technical utility in itself.

4: Flat portion 5: Protective portion 10: Fireproof tile 12: Fixed portion 14: Insertion hole 22: Insertion hole 30: Protected member 32: Connection portion (first connection portion)
100: Protective refractory tile system

Claims (9)

A refractory tile for protecting a plurality of protected members extending in parallel,
two protective parts having a shape that surrounds a part of the outer peripheral surface of each of the two adjacent members to be protected and that extends in the extending direction along each outer peripheral surface;
a fixing part provided between the two protective parts and connecting the two protective parts, and provided with a structure for fixing to the member to be protected;
A refractory tile having a flat portion extending from one protective portion to the other protective portion via the fixed portion on the surface opposite to the surface facing the member to be protected. 2. The fire-resistant tile according to claim 1, wherein the fire-resistant tile is composed of a material mainly containing SiC and further containing _SiO2 . 3. The refractory tile according to claim 1, wherein the refractory tile has an apparent porosity of 3% or more and 18% or less. The structure for fixing the fireproof tile to the member to be protected is an insertion hole into which a fixing member for fixing the member to be protected and the fireproof tile is inserted,
The refractory tile according to any one of claims 1 to 3, wherein the insertion holes are provided on both sides of the fixed portion in the extending direction. A refractory tile for protecting a plurality of protected members extending in parallel,
two protective parts surrounding a part of the outer peripheral surface of each of the two adjacent members to be protected and having a shape along each outer peripheral surface;
a fixing part provided between the two protective parts and connecting the two protective parts, and provided with a structure for fixing to the member to be protected;
The structure for fixing the fireproof tile to the member to be protected is an insertion hole into which a fixing member for fixing the member to be protected and the fireproof tile is inserted,
The refractory tile, wherein the insertion holes are provided on both sides of the fixed portion in the extending direction. 6. The fireproof tile according to claim 5, wherein said insertion hole is provided on a flat surface at one end face of said fixing part in said extending direction. 7. The refractory tile according to claim 5 or 6, wherein the shape of said insertion hole is non-circular. two protected members extending in parallel;
a connecting portion connecting the two members to be protected;
A fireproof tile according to any one of claims 1 to 7,
A protective refractory tile system, wherein the connecting portion and the fixing portion provided on the refractory tile are fixed by a fixing member separate from the member to be protected and the refractory tile. 9. The protective refractory tile system of Claim 8, wherein the protected member is a water pipe.

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