Skid pipe for heating furnace and method for insulating skid pipe for heating furnace

Abstract

The present invention provides a skid pipe for a heating furnace that can reduce skid marks by suppressing heat transfer via skid buttons through simple processing and installation methods, without compromising the cooling performance of the skid beam or requiring major changes to the equipment specifications. [Solution] A skid pipe 1 for a heating furnace, comprising a skid button 11 that supports a material to be heated in a heating furnace for heating the material to be heated, a skid beam 12 that supports the skid button 11 and has a space through which a cooling medium C flows, a retaining clip 13 that fixes the skid button 11 to the skid beam 12, and a skid post that supports the skid beam 12, characterized in that a flexible heat insulating material 14 that can be deformed to match the shape of the surface of the skid button 11 is arranged between the skid button 11 and the skid beam 12, or between the skid button 11 and the retaining clip 13.

Description

Technical Field

[0001] The present invention relates to a skid pipe for a heating furnace and a heat insulation method thereof.

Background Art

[0002] A heating furnace used in the hot rolling process of the ironmaking process is a facility for producing thin plates by heating a slab, which is a material to be heated, and subjecting it to rolling. In the heating furnace, a table for placing the slab, called a skid pipe, is installed to transport the slab from the charging side to the extraction side, and a skid beam, which is a pipe for water-cooling the skid pipe, is provided.

[0003] There are fixed-type and movable-type skid pipes, and both have the configuration shown in FIG. 1. That is, a skid pipe 100, which is an example of a general skid pipe for a heating furnace shown in FIG. 1, includes a skid button 11 that supports the material to be heated on an upper surface 11a, which is a support surface, a skid beam 12 that supports the skid button 11 and has a space inside through which a cooling medium C such as cooling water flows and extends in the horizontal direction, and a pressing metal fitting 13 that fixes the skid button 11 to the skid beam 12. In the skid pipe 100, a lower surface 11b of the skid button 11 and an outer peripheral surface 12a of the skid beam 12 are in contact with each other, and a side surface 11c of the skid button 11 and an inner surface 13a of the pressing metal fitting 13 are in contact with each other.

[0004] Although not shown in FIG. 1, the skid pipe 100 further includes a skid post that supports the skid beam 12 and extends in the vertical direction, and a refractory heat insulation material that covers the outer periphery of the skid beam 12 and the periphery of the contact portion between the skid button 11 and the skid beam 12 to protect the skid button 11 and the skid beam 12 from the high-temperature atmosphere inside the heating furnace.

[0005] When transporting a slab from the charging side to the extraction side of a heating furnace using a skid pipe having the skid pipe 100 described above, the heat from the slab is removed by the cooling medium C circulating inside the skid beam 12 via the skid button 11. As a result, a temperature difference is created on the underside of the slab between the part in contact with the skid button 11 and the part not in contact with the skid button 11, resulting in localized low-temperature areas called skid marks. Since large skid marks degrade the quality of the slab, reducing skid marks is essential for improving the quality of the slab.

[0006] Against this backdrop, Patent Document 1 describes a method for reducing skid marks by suppressing heat transfer between a skid button and a skid beam by inserting a porous metal made of stainless steel or a heat-resistant alloy between the skid button and the skid beam to provide an insulating layer.

[0007] Patent Document 2 describes a method for reducing skid marks by using skid buttons made of heat-resistant steel with sufficient strength and increasing the height of the skid buttons.

[0008] Patent document 3 describes a method for reducing skid marks by insulating the inside of a skid beam. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Patent Publication No. 2019-99855 [Patent Document 2] Japanese Patent Publication No. 2011-58014 [Patent Document 3] Japanese Patent Application Publication No. 10-183233 [Overview of the project] [Problems that the invention aims to solve]

[0010] However, when forming an insulating layer by inserting porous metal between the skid button and the skid beam, as described in Patent Document 1, it is necessary to manufacture porous metal in a shape that does not form gaps at the curved interface between the skid button and the skid beam, which increases the cost and time of manufacturing. Furthermore, since the surface of the skid beam is not always a perfectly curved surface as specified in the design drawings due to thermal deformation, processing to match the surface shape of the skid beam is required at the installation site, which also adds to the effort involved in installation. Moreover, because the shape of the retaining clip 13 is complex, it is difficult to process and install the porous metal to match the shape of the retaining clip 13.

[0011] Furthermore, if the height of the skid buttons is increased, as in the method described in Patent Document 2, the specifications of the skid beams and skid posts must also be changed, requiring large-scale equipment modifications.

[0012] Furthermore, when the inside of a skid beam is insulated, as in the method described in Patent Document 3, the cooling performance of the skid beam itself, which is a support member of the slab, decreases and its temperature rises, thus reducing the strength of the skid beam. In addition, if the heating furnace is operated continuously for a long period of time, cracks may occur in the refractory insulation material covering the skid beam, causing it to fall off, and if the exposed skid beam is directly heated, the skid beam itself may thin, potentially leading to water leakage. For this reason, the refractory insulation material applied to the skid beam is required to have both high insulation performance and durability, which leads to increased costs.

[0013] The present invention has been made in view of the above problems, and its objective is to provide a skid pipe for a heating furnace that can reduce skid marks by suppressing heat transfer via skid buttons using a simple processing and construction method, without impairing the cooling performance of the skid beam or making large-scale changes to the equipment specifications. [Means for solving the problem]

[0014] The present invention, which solves the above problems, is as follows.

[0015] 1. A skid pipe for a heating furnace comprising: a skid button that supports a material to be heated in a heating furnace for heating the material to be heated; a skid beam that supports the skid button and has a space through which a cooling medium flows; a retaining clip that fixes the skid button to the skid beam; and a skid post that supports the skid beam, A skid pipe for a heating furnace, characterized in that a flexible heat insulating material, which can be deformed to match the shape of the surface of the skid button, is disposed between the skid button and the skid beam, or between the skid button and the retaining clip.

[0016] 2. The flexible thermal insulation material is a skid pipe for a heating furnace as described in paragraph 1, wherein the elastic modulus E (MPa), strength σ (MPa), and thickness t (mm) satisfy the following formula (1). E × t / (2 × σ) ≤ Rs (1) Here, Rs is the radius of curvature (mm) of the surface of the skid button.

[0017] 3. The flexible thermal insulation material is a skid pipe for a heating furnace as described in 1, wherein the elastic modulus E (MPa) and strength σ (MPa) satisfy the following formula (2). E / (2×σ)≦1 (2)

[0018] 4. The flexible thermal insulation material is a skid pipe for a heating furnace as described in 1, wherein the elastic modulus E (MPa), strength σ (MPa), and thickness t (mm) satisfy the following formula (3). E × t / (2 × σ) ≤ 3 (mm) (3)

[0019] 5. A skid pipe for a heating furnace according to any one of items 1 to 4, wherein the flexible heat insulating material is disposed both between the skid button and the skid beam, and between the skid button and the retaining clip.

[0020] 6. The thickness of the flexible heat insulating material is less than 5 mm, and the skid pipe for a heating furnace according to any one of the above items 1 to 5.

[0021] 7. The heat conductivity of the flexible heat insulating material is 1.0 W / m / K or less, and the skid pipe for a heating furnace according to any one of the above items 1 to 6.

[0022] 8. A method for insulating a skid pipe for a heating furnace, comprising a skid button for supporting a heated material in a heating furnace for heating the heated material, a skid beam for supporting the skid button and having a space inside through which a cooling medium flows, a pressing fitting for fixing the skid button to the skid beam, and a skid post for supporting the skid beam, the method comprising: Disposing a flexible heat insulating material deformable in accordance with the shape of the surface of the skid button between at least one of the skid button and the skid beam or between the skid button and the pressing fitting.

[0023] 9. The method for insulating a skid pipe for a heating furnace according to item 8 above, wherein the flexible heat insulating material satisfies the following formula (1) with respect to the elastic modulus E (MPa), strength σ (MPa), and thickness t (mm). E × t / (2 × σ) ≦ Rs (1) Here, Rs is the radius of curvature (mm) of the surface of the skid button.

[0024] 10. The method for insulating a skid pipe for a heating furnace according to item 8 above, wherein the flexible heat insulating material satisfies the following formula (2) with respect to the elastic modulus E (MPa) and strength σ (MPa). E / (2 × σ) ≦ 1 (2)

[0025] 11. The method for insulating a skid pipe for a heating furnace according to item 8 above, wherein the flexible heat insulating material satisfies the following formula (3) with respect to the elastic modulus E (MPa), strength σ (MPa), and thickness t (mm). E × t / (2 × σ) ≦ 3 (mm) (3)

[0026] 12. A method for insulating a skid pipe for a heating furnace according to any one of items 8 to 11, wherein the flexible insulating material is arranged both between the skid button and the skid beam, and between the skid button and the retaining clip.

[0027] 13. The method for insulating a skid pipe for a heating furnace according to any one of items 8 to 12, wherein the thickness of the flexible insulating material is less than 5 mm.

[0028] 14. A method for insulating a skid pipe for a heating furnace according to any one of items 8 to 13, wherein the thermal conductivity of the flexible insulating material is 1.0 W / m / K or less. [Effects of the Invention]

[0029] According to the present invention, skid marks can be reduced by suppressing heat transfer via skid buttons through simple processing and construction methods, without impairing the cooling performance of the skid beam or requiring major changes to the equipment specifications. [Brief explanation of the drawing]

[0030] [Figure 1] This is a cross-sectional view of an example of a conventional skid pipe for a heating furnace. [Figure 2] This is a cross-sectional view of an example of a skid pipe for a heating furnace according to the present invention. [Figure 3] This is a cross-sectional view of another example of a skid pipe for a heating furnace according to the present invention. [Figure 4] This is a cross-sectional view of a preferred example of a skid pipe for a heating furnace according to the present invention. [Modes for carrying out the invention]

[0031] (Skid pipe for heating furnace) Embodiments of the present invention will be described below with reference to the drawings. The skid pipe for a heating furnace according to the present invention is a skid pipe for a heating furnace that includes a skid button for supporting a material to be heated in a heating furnace that heats the material to be heated, a skid beam that supports the skid button and has a space through which a cooling medium flows, a retaining fitting for fixing the skid button to the skid beam, and a skid post that supports the skid beam. Herein, a flexible heat insulating material that can be deformed to match the shape of the surface of the skid button is arranged between the skid button and the skid beam, or between the skid button and the retaining fitting, in at least one of these locations.

[0032] The inventors diligently studied to solve the above problems. As a result, they came up with the idea of ​​providing a flexible heat insulating material that can be deformed to match the shape of the surface of the skid button 11, at least one of the spaces between the skid button 11 and the skid beam 12, or between the skid button 11 and the retaining clip 13. That is, as shown in Figure 1, in the conventional skid pipe 100, the skid button 11 is placed on the skid beam 12, which is cooled by circulating a cooling medium C such as cooling water inside, and the skid button 11 is fixed on the skid beam 12 by the retaining clip 13. Then, since a high-temperature slab is placed on the skid button 11, the heat from the slab is absorbed by the cooled skid beam 12 via the skid button 11 and the retaining clip 13.

[0033] In contrast, in the skid pipe of the present invention, a flexible heat insulating material that can be deformed to match the surface shape of the skid button 11 is placed between the skid button 11 and the skid beam 12, or between the skid button 11 and the retaining clip 13. In the skid pipe of the present invention, since only the heat insulating material is inserted, it can be implemented with simple construction and can be carried out without significant changes to the equipment specifications, as in the method described in Patent Document 2. Furthermore, since it does not hinder the cooling of the skid beam 12 itself, unlike the method described in Patent Document 3, the cooling effect on the skid beam 12 itself can be maintained without change while suppressing heat dissipation by the skid button 11. Moreover, since the heat insulating material can be deformed to match the surface shape of the skid button, on-site processing of the heat insulating material to match the shape of the construction site, as described in Patent Document 1, is unnecessary, and the effort required for on-site construction can be reduced. Thus, the present invention has been completed.

[0034] As is clear from the above description, the skid pipe according to the present invention is characterized by the arrangement of a flexible heat insulating material that can be deformed to match the surface shape of the skid button 11, and other components can be appropriately adapted from conventionally known configurations. The skid pipe according to the present invention will be described in detail below, but the present invention is not limited thereto.

[0035] Figure 2 shows a cross-sectional view illustrating an example of a skid pipe for a heating furnace according to the present invention. Components identical to those shown in Figure 1 are denoted by the same reference numerals. The difference between the skid pipe 1 shown in Figure 2 and the skid pipe 100 shown in Figure 1 is that in the skid pipe 1 shown in Figure 2, a flexible heat insulating material 14, which can be deformed to match the surface shape of the skid button 11, is placed between the skid button 11 and the skid beam 12. This allows for the suppression of heat transfer via the skid button 11 and the reduction of skid marks through simple processing and construction methods, without impairing the cooling performance of the skid beam 12 or requiring major changes to the equipment specifications.

[0036] Generally, the shape of the lower surface 11b of the skid button 11 is roughly the same as the shape of the outer surface 12a of the skid beam 12. Therefore, if the flexible insulation material 14 can be deformed to match the surface shape of the skid button 11, the flexible insulation material 14 can be modified to match the shape of the outer surface 12a of the skid beam 12.

[0037] By arranging the flexible insulation material 14 in this way, even when the shapes of the lower surface 11b of the skid button 11 and the outer peripheral surface 12a of the skid beam 12 are complex, no gap is formed between the skid button 11 and the skid beam 12, and heat transfer between them can be suppressed. This makes it possible to achieve both strong fixation of the skid button 11 and thermal insulation performance.

[0038] Furthermore, since on-site processing of insulation materials to match the shape of the construction area is unnecessary, the effort required for on-site construction can be reduced. In addition, there is no need to manufacture insulation materials with unique specifications (custom shapes) to match the surface shape of the skid beam 12, and general insulation materials can be used.

[0039] Furthermore, the flexible insulation material 14 does not necessarily have to be made of a single component (the flexible insulation material 14 as a single unit), as long as it can be deformed to match the surface shape of the skid button 11. It may also be made of multiple components (the flexible insulation material 14 may be divided). However, in terms of insulation effect, it is preferable that it be made of a single component.

[0040] Flexible insulation material 14 can include insulation boards, insulation sheets, blankets, etc.

[0041] When the flexible insulation material 14 is constructed from a single component, it is preferable that the elastic modulus E (MPa), strength σ (MPa), and thickness t (mm) of the flexible insulation material 14 satisfy the following formula (1). This prevents the flexible insulation material 14 from fracturing during bending deformation, which would necessitate rework and increase construction time. E × t / (2 × σ) ≤ Rs (1) Here, Rs is the radius of curvature (mm) of the surface of the skid button.

[0042] When the flexible insulation material 14 has an elastic modulus E (MPa), thickness t (mm), and strength σ (MPa), bending the flexible insulation material 14 with a radius of curvature R (mm) generates a maximum tensile stress of E × t / (2 × R) in the flexible insulation material 14. Therefore, the minimum radius of curvature R0 at which the flexible insulation material 14 can be bent without breaking is E × t / (2 × σ). When the flexible insulation material 14 is placed between the skid button 11 and the skid beam 12, it is sufficient to ensure that it does not break when bent at the curvature Rs of the surface (bottom surface 11b) of the skid button 11. Therefore, by selecting a flexible insulation material 14 such that E × t / (2 × σ) ≤ Rs, breakage can be suppressed.

[0043] Figure 3 shows a cross-sectional view illustrating another example of a skid pipe for a heating furnace according to the present invention. Components identical to those shown in Figure 2 are denoted by the same reference numerals. The difference between the skid pipe 2 shown in Figure 3 and the skid pipe 1 shown in Figure 2 is that in the skid pipe 2 shown in Figure 3, the flexible heat insulating material 15 is positioned between the skid button 11 and the retaining clip 13. In this case, as with the skid pipe 1 shown in Figure 2, it is possible to reduce skid marks by suppressing heat transfer via the skid button 11 with a simple processing and construction method, without impairing the cooling performance of the skid beam 12 or requiring major changes to the equipment specifications.

[0044] When the flexible insulation material 15 is placed between the skid button 11 and the retaining clip 13, as shown in the skid pipe 2 in Figure 3, it will be bent with a smaller radius of curvature compared to when it is placed between the skid button 11 and the skid beam 12, as shown in the skid pipe 1 in Figure 2. However, the radius of curvature in this case cannot be uniformly determined. Nevertheless, as a result of diligent research by the inventors, it has become clear that if the minimum radius of curvature R0 is 2 times or less, preferably 1 time or less, the fracture of the flexible insulation material 15 can be reduced. Therefore, it is preferable that the elastic modulus E (MPa), strength σ (MPa), and thickness t (mm) are 2 or less, and more preferably 1 or less, satisfying the following equation (2). E / (2×σ)≦1 (2)

[0045] The flexible thermal insulation material 15 is more preferably such that the elastic modulus E (MPa), strength σ (MPa), and thickness t (mm) satisfy the following formula (3), with E / (2×σ) being 3 mm or less. E × t / (2 × σ) ≤ 3 (mm) (3)

[0046] Figure 4 shows a cross-sectional view illustrating a preferred example of a skid pipe for a heating furnace according to the present invention. Components identical to those shown in Figure 3 are denoted by the same reference numerals. The difference between the skid pipe 3 shown in Figure 4 and the skid pipe 2 shown in Figure 3 is that in the skid pipe 3 shown in Figure 4, both the flexible heat insulating materials 14 and 15 are positioned between the skid button 11 and the skid beam 12, and between the skid button 11 and the retaining clip 13. More specifically, the flexible heat insulating material 14 is positioned between the skid button 11 and the skid beam 12, and the flexible heat insulating material 15 is positioned between the skid button 11 and the retaining clip 13. This further suppresses heat transfer via the skid button 11, thereby further reducing skid marks.

[0047] Furthermore, for any of the skid pipes 1 to 3 shown in Figures 2 to 4, the thinner the flexible insulation material 14, the better, and its thickness is preferably 5 mm or less. The thinner the flexible insulation material 14, the easier it is to bend it into complex shapes. Therefore, the flexible insulation material 14 can be tightly fitted and securely fixed between the skid button 11 and the skid beam 12, or between the skid button 11 and the retaining bracket 13, thereby reducing rattling of the skid button 11. This is particularly effective when the bending shape of the flexible insulation material 14 becomes complex when it is placed between the skid button 11 and the retaining bracket 13.

[0048] Furthermore, for any of the skid pipes 1 to 3 shown in Figures 2 to 4, it is preferable that the thermal conductivity of the flexible insulation materials 14 and 15 is 1.0 W / m / K or less. This further suppresses heat transfer via the skid button 11 and further reduces skid marks.

[0049] (Method for insulating skid pipes for heating furnaces) The present invention relates to a method for insulating a skid pipe for a heating furnace, comprising a button that supports a material to be heated in a heating furnace that heats the material to be heated, a beam that cools and supports the button, a retaining clip that fixes the button to the beam, and a post that supports the beam. Hereinafter, a flexible insulating material that can be deformed to match the surface shape of the skid beam is placed between the skid button and the skid beam, or between the skid button and the retaining clip, at least one of the above.

[0050] As described above for the skid pipes 1 to 3 according to the present invention, by placing flexible heat insulating materials 14 and 15 that can be deformed to match the surface shape of the skid button 11 between the skid button 11 and the skid beam 12, or between the skid button 11 and the retaining bracket 13, it is possible to implement the method without significant changes to the equipment specifications, as described in Patent Document 2. Furthermore, since it does not hinder the cooling of the skid beam 12 itself, unlike the method described in Patent Document 3, the cooling effect on the skid beam 12 itself can be maintained without change while suppressing heat dissipation by the skid button 11. In addition, since the heat insulating material can be deformed to match the surface shape of the skid button, on-site processing of the heat insulating material to match the shape of the construction site, as described in Patent Document 1, becomes unnecessary, and the effort required for on-site construction can be reduced.

[0051] Furthermore, the requirements for the flexible insulation materials 14 and 15 are the same as those for the flexible insulation materials 14 and 15 in the skid pipes 1 to 3 according to the present invention described above, so we will omit further explanation. [Examples]

[0052] The following describes examples of the present invention, but the present invention is not limited to these examples.

[0053] (Example 1) Skid pipes are prepared as shown in detail in Table 1. As shown in Examples 1-1 to 1-3 in Table 1, R0 is R SWhen the following conditions are met and E / 2σ is 1.0 or less, and a deformable insulating material (Al2O3-SiO2 insulating board) is placed between the skid button 11 and the skid beam 12, between the skid button 11 and the retaining bracket 13, or both between the skid button 11 and the skid beam 12 and between the skid button 11 and the retaining bracket 13, the temperature of the upper surface 11a of the skid button 11 is 950°C or higher, and heat loss from the skid button 11 is suppressed. In this case, no rupture of the insulating materials 14 and 15 occurred during construction, and the construction period was 1 day. In Table 1, "○" for the insertion site of the insulating material means that insulating material was placed between the skid button and the skid beam (between the skid button and the retaining bracket), and "-" means that it was not placed.

[0054] Furthermore, as shown in Examples 1-4 to 1-6, R0 is R S When a thermal insulation material (Al2O3-SiO2 thermal insulation board) that is less than or equal to the above and has an E / 2σ of more than 1.0 and is deformable to match the shape of each surface is placed between the skid button 11 and the skid beam 12, between the skid button 11 and the retaining bracket 13, or both between the skid button 11 and the skid beam 12 and between the skid button 11 and the retaining bracket 13, the temperature of the upper surface 11a of the skid button 11 was 950°C or higher, and heat dissipation from the skid button 11 was suppressed. In addition, there were some instances of re-installation due to breakage when installing the thermal insulation materials 14 and 15, and the installation period was 1.5 days when installed only between the skid button 11 and the skid beam 12, and 2 days when installed between the skid button and the retaining bracket 13 as well, but this was within an acceptable range.

[0055] In Examples 1-6, the insulation material installed between the skid button 11 and the skid beam 12, and between the skid button 11 and the retaining bracket 13, was a single, integrated component. In contrast, in Example 1-7, insulation material of the same material and thickness as in Example 1-6 was prepared, but it was divided and installed between the skid button 11 and the skid beam 12, and between the skid button 11 and the retaining bracket 13. As a result, the insulation performance was slightly lower than in Example 1-6, but heat loss from the skid button 11 was sufficiently suppressed. The installation period was almost the same as in Example 1-6, taking two days.

[0056] On the other hand, as in conventional examples, when the insulating materials 14 and 15 were not placed, the temperature of the upper surface 11a of the skid button 11 dropped to 930°C, indicating that significant heat was lost from the skid button 11.

[0057] Furthermore, as shown in Comparative Examples 1-1 and 1-2, R0 is R S In cases where the value exceeds and E / 2σ is greater than 1.0, and the insulation materials 14 and 15 cannot be deformed to conform to the shape of each surface, the insulation materials 14 and 15 could not be bent, making installation impossible.

[0058] [Table 1]

[0059] (Example 2) As shown in Examples 2-1 to 2-4 of Table 2, thermal insulation materials 14 and 15 of different thicknesses, which can be deformed to match the shape of each surface, were placed both between the skid button 11 and the skid beam 12, and between the skid button 11 and the retaining clip 13.

[0060] As shown in Examples 2-1 to 2-3, when insulation materials 14 and 15 with a thickness of less than 5 mm were placed, no looseness of the skid buttons 11 was observed after the insulation materials 14 and 15 were placed. On the other hand, as shown in Examples 2-4 and 2-5, when insulation materials 14 and 15 with a thickness of 5 mm or more were placed, looseness of the skid buttons 11 was observed after the insulation materials 14 and 15 were placed, but there were no quality issues with the slab after the rolling process in the heating furnace was completed.

[0061] [Table 2]

[0062] (Example 3) As shown in Examples 3-1 to 3-5 of Table 3, thermal insulation materials 14 and 15 with different thermal conductivity that can be deformed to match the shape of each surface were placed both between the skid button 11 and the skid beam 12 and between the skid button 11 and the retaining clip 13.

[0063] As shown in Examples 3-1 to 3-4, when insulating materials 14 and 15 with a thermal conductivity of 1.0 W / m / K or less were placed, the temperature of the upper surface 11a of the skid button 11 was 970°C or higher, and heat dissipation from the skid button 11 was suppressed very well. Note that Example 3-1 is the same as Example 2-2 in Table 2. On the other hand, as shown in Example 3-5, when insulating materials 14 and 15 with a thermal conductivity exceeding 1.0 W / m / K were placed, the temperature of the upper surface 11a of the skid button 11 was 955°C, but there were no quality problems with the slab after the completion of the rolling process in the heating furnace.

[0064] [Table 3] [Industrial applicability]

[0065] According to the present invention, it is possible to provide a skid pipe for a heating furnace that can reduce skid marks by suppressing heat transfer via skid buttons through a simple processing and construction method, without impairing the cooling performance of the skid beam or making major changes to the equipment specifications. [Explanation of symbols]

[0066] 1,2,3,100 Skid Pipe 11 Skid Buttons 11a Top surface 11b Bottom side 11c side 12 Skid Beam 12a Outer surface 13. Retaining clip 13a Inner surface 14, 15 Flexible insulation material C Cooling medium

Claims

1. A skid pipe for a heating furnace comprising: a skid button that supports a material to be heated in a heating furnace for heating the material to be heated; a skid beam that supports the skid button and has a space through which a cooling medium flows; a retaining clip that fixes the skid button to the skid beam; and a skid post that supports the skid beam, A skid pipe for a heating furnace, characterized in that a flexible heat insulating material, which can be deformed to match the shape of the surface of the skid button, is disposed between the skid button and the skid beam, or between the skid button and the retaining clip.

2. The skid pipe for a heating furnace according to claim 1, wherein the flexible thermal insulation material satisfies the following formula (1) for elastic modulus E (MPa), strength σ (MPa), and thickness t (mm). E × t / (2 × σ) ≤ Rs (1) Here, Rs is the radius of curvature (mm) of the surface of the skid button.

3. The skid pipe for a heating furnace according to claim 1, wherein the flexible thermal insulation material satisfies the following formula (2) for its elastic modulus E (MPa) and strength σ (MPa). E / (2×σ)≦1 (2)

4. The skid pipe for a heating furnace according to claim 1, wherein the flexible heat insulating material satisfies the following formula (3) for elastic modulus E (MPa), strength σ (MPa), and thickness t (mm). E×t / (2×σ)≦3(mm) (3)

5. The skid pipe for a heating furnace according to any one of claims 1 to 4, wherein the flexible heat insulating material is disposed both between the skid button and the skid beam, and between the skid button and the retaining clip.

6. The skid pipe for a heating furnace according to any one of claims 1 to 4, wherein the thickness of the flexible heat insulating material is less than 5 mm.

7. The skid pipe for a heating furnace according to any one of claims 1 to 4, wherein the thermal conductivity of the flexible insulating material is 1.0 W / m / K or less.

8. A method for insulating a skid pipe for a heating furnace, comprising: a skid button that supports a material to be heated in a heating furnace for heating the material to be heated; a skid beam that supports the skid button and has a space through which a cooling medium flows; a retaining clip that fixes the skid button to the skid beam; and a skid post that supports the skid beam, A method for insulating a skid pipe for a heating furnace, characterized in that a flexible insulating material that can be deformed to match the shape of the surface of the skid button is placed between the skid button and the skid beam, or between the skid button and the retaining clip.

9. The method for insulating a skid pipe for a heating furnace according to claim 8, wherein the flexible insulating material satisfies the following formula (1) for elastic modulus E (MPa), strength σ (MPa), and thickness t (mm). E × t / (2 × σ) ≤ Rs (1) Here, Rs is the radius of curvature (mm) of the surface of the skid button.

10. The method for insulating a skid pipe for a heating furnace according to claim 8, wherein the flexible insulating material satisfies the following formula (2) for elastic modulus E (MPa) and strength σ (MPa). E / (2×σ)≦1 (2)

11. The method for insulating a skid pipe for a heating furnace according to claim 8, wherein the flexible insulating material satisfies the following formula (3) for elastic modulus E (MPa), strength σ (MPa), and thickness t (mm). E×t / (2×σ)≦3(mm) (3)

12. A method for insulating a skid pipe for a heating furnace according to any one of claims 8 to 11, wherein the flexible heat insulating material is disposed between the skid button and the skid beam, and between the skid button and the retaining clip.

13. The method for insulating a skid pipe for a heating furnace according to any one of claims 8 to 11, wherein the thickness of the flexible insulating material is less than 5 mm.

14. The method for insulating a skid pipe for a heating furnace according to any one of claims 8 to 11, wherein the thermal conductivity of the flexible insulating material is 1.0 W / m / K or less.

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