A fully fiber-reinforced roof structure for a steel rolling heating furnace

Abstract

A full-fiber furnace roof structure for a steel rolling reheating furnace is disclosed, relating to the field of reheating furnaces. The full-fiber furnace roof structure includes a high-temperature resistant fiber module layer composed of multiple high-temperature resistant fiber modules, multiple heat-insulating fiber liners, multiple fiber module mounting and fixing components that fix the heat-insulating fiber liners to the top surface of the high-temperature resistant fiber module layer, multiple furnace roof steel beams, multiple furnace roof hanging small steel beams connected to the furnace roof steel beams, and multiple bent channel plates. The bent channel plates press against the top surface of the heat-insulating fiber liners, and are connected to at least two pairs of channel plate hanging parts that suspend the furnace roof hanging small steel beams. The fiber module mounting and fixing components connect to the bent channel plates. An installation joint is provided between two adjacent high-temperature resistant fiber modules along their length, and a seam-pressing fiber blanket is provided at the top of the installation joint between the two bent channel plates. The full-fiber furnace roof structure for the steel rolling reheating furnace can solve the tearing damage to the high-temperature resistant fiber modules caused by thermal expansion deformation and prevent seam fire and burning damage.

Description

Technical Field

[0001] This application relates to the field of heating furnaces, and more specifically, to a full fiber furnace roof structure for a steel rolling heating furnace. Background Technology

[0002] Steel rolling heating furnaces are used to heat steel billets at high temperatures before rolling. Since the furnace chamber temperature reaches 1200–1300℃, the furnace body employs a multi-layered composite refractory masonry to ensure it can withstand the high temperatures and reduce heat loss. As a crucial component of the furnace's refractory masonry, the furnace roof refractory material typically uses a flat-top suspended structure. This structure consists of a composite layer of high-temperature resistant heavy castable, lightweight insulating castable, fiber castable, or fiber blankets, with high-alumina anchor bricks used to fix and support the weight of the refractory material. However, with this masonry structure, the surface temperature of the high-temperature section of the furnace roof reaches 105–125℃, and the temperature on the top surface and surrounding area of ​​the anchor bricks is even higher, resulting in significant heat dissipation that fails to meet energy conservation and emission reduction requirements.

[0003] With advancements in the technology and manufacturing processes of high-temperature refractory fiber materials, and the need for further reductions in furnace top surface temperature and energy consumption, heating furnaces are increasingly adopting all-fiber refractory material structures for their tops. These all-fiber refractory material tops can withstand the high temperatures of the furnace chamber while reducing the furnace top surface temperature to 60-80°C. Compared to castable refractory masonry structures, the heat loss from the furnace top can be reduced by 30-35%, and the overall energy consumption saving rate of the heating furnace can reach 4-5%.

[0004] The all-fiber refractory furnace roof consists of a tightly bound high-temperature resistant fiber module layer, a heat-insulating fiber lining plate on the top surface of the high-temperature resistant fiber module layer, a fiber module mounting and fixing assembly that fixes the heat-insulating fiber lining plate to the high-temperature resistant fiber module layer, and a furnace roof refractory mounting steel component and a hanging steel component that fix the fiber module mounting and fixing assembly.

[0005] However, current production of high-temperature resistant fiber modules involves folding refractory fiber blankets according to design dimensions and then compressing and binding them unidirectionally along the folded layers at a certain ratio. This compression and binding can only be carried out along one direction (width direction) of the folded layers, while the other direction (length direction) of the high-temperature resistant fiber module remains at its natural length. After the all-fiber refractory furnace roof is installed and put into use, the high-temperature resistant fiber modules will shrink to a certain extent at a high temperature of around 1250℃. Concentrated shrinkage seams will form at some fiber module joints along the length direction, which may cause the steel components with refractory material to glow red or even flare along the seams. This can exacerbate the deformation of the steel components with refractory material installed on the furnace roof and may even burn out the steel components with refractory material installed on the furnace roof. Meanwhile, the steel components for installing refractory materials on the furnace top surface use an integral flat steel plate reinforced with structural steel. While this facilitates the installation and fixing of heat-resistant steel bolts, under blast furnace temperatures of 70-80°C, the flat steel plate on the furnace top undergoes irregular thermal expansion deformation, sometimes even large concentrated deformation. This causes significant damage and tearing to the fiber modules and insulating fiber liners, resulting in tearing seams and even red-hot or flaming areas on the furnace top. Furthermore, the integral flat steel plate structure makes maintenance and repair of red-hot or flaming areas on the furnace top very inconvenient. In addition, the steel components for installing refractory materials on the furnace top surface use a grating splicing structure. While this can mitigate the thermal expansion deformation problem to some extent, it makes positioning and fixing the heat-resistant steel bolts for the fiber modules very difficult. Maintenance is also challenging when the furnace top shows red-hot or flaming areas. More importantly, the pores in the grating splicing components do not adequately protect the insulating fiber liners and fiber modules from external impact damage. Summary of the Invention

[0006] The purpose of this application is to provide a full fiber furnace top structure for a steel rolling heating furnace, which can solve the problem of thermal expansion and deformation of the furnace top steel structure and its tearing damage to the high-temperature resistant fiber modules, and prevent the joints of the high-temperature resistant fiber modules from glowing red and catching fire, thus burning the steel structure hanging on the furnace top surface and extending the service life of the furnace top.

[0007] This application is implemented as follows:

[0008] This application provides a full fiber furnace top structure for a steel rolling heating furnace, comprising a high-temperature resistant fiber module layer composed of multiple high-temperature resistant fiber modules, multiple heat-insulating fiber liners, and multiple fiber module mounting and fixing components. The fiber module mounting and fixing components are used to fix the heat-insulating fiber liners to the top surface of the high-temperature resistant fiber module layer. It also includes multiple furnace top steel beams, multiple furnace top hanging small steel beams, and multiple bent channel plates. Each furnace top hanging small steel beam is connected to each furnace top steel beam. Each bent channel plate abuts against the top surface of the heat-insulating fiber liner. Each bent channel plate is connected to at least two pairs of channel plate hangers that are suspended from the furnace top hanging small steel beams. The top of the fiber module mounting and fixing components is connected to the corresponding bent channel plate. An installation joint is provided between two adjacent high-temperature resistant fiber modules arranged along the length of the heating furnace. The top of the installation joint is provided with a wide gap located between the two bent channel plates, and a pressure fiber blanket is provided in the wide gap.

[0009] In some alternative embodiments, an expansion gap is provided between two adjacent bent groove plates arranged along the width direction of the heating furnace.

[0010] In some alternative implementations, the length of the expansion gap is 20-25 mm.

[0011] In some alternative implementations, a stitching fiber board is provided on top of the stitching fiber blanket.

[0012] In some alternative implementations, the length of the wide gap is 150-250 mm.

[0013] In some alternative implementations, the bent channel plate includes a steel plate body, the four sides of which are bent in the same direction to form folded edges.

[0014] The beneficial effects of this application are as follows: The all-fiber furnace top structure of the steel rolling heating furnace provided by this application includes a high-temperature resistant fiber module layer composed of multiple high-temperature resistant fiber modules, multiple heat-insulating fiber liners, and multiple fiber module installation and fixing components. The fiber module installation and fixing components are used to fix the heat-insulating fiber liners to the top surface of the high-temperature resistant fiber module layer. It also includes multiple furnace top steel beams, multiple furnace top hanging small steels, and multiple bent channel plates. Each furnace top hanging small steel is connected to each furnace top steel beam. Each bent channel plate abuts against the top surface of the heat-insulating fiber liner. Each bent channel plate is connected to at least two pairs of channel plate hangers that are suspended from the furnace top hanging small steels. The top of the fiber module installation and fixing components is connected to the corresponding bent channel plate. There is an installation joint between two high-temperature resistant fiber modules arranged adjacent to each other along the length of the heating furnace. The top of the installation joint is provided with a wide gap between the two bent channel plates. A pressure fiber blanket is provided in the wide gap. The all-fiber furnace top structure for steel rolling heating furnaces provided in this application can solve the problem of thermal expansion and deformation of the furnace top steel structure and its tearing damage to the high-temperature resistant fiber modules, and prevent the joints of the high-temperature resistant fiber modules from glowing red and catching fire, thus burning the steel structure hanging on the furnace top surface and extending the service life of the furnace top. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a partial cross-sectional view of the all-fiber furnace top structure of the steel rolling heating furnace provided in the embodiments of this application;

[0017] Figure 2 For along Figure 1 A partial sectional view of the structure along section AA in the middle section;

[0018] Figure 3 A cross-sectional view of the bent groove plate in the all-fiber furnace top structure of the steel rolling heating furnace provided in this embodiment of the application;

[0019] Figure 4 This is a schematic diagram of the trough-shaped plate hanging component in the all-fiber furnace top structure of the steel rolling heating furnace provided in the embodiments of this application.

[0020] In the diagram: 100, High-temperature resistant fiber module layer; 101, High-temperature resistant fiber module; 110, Thermal insulation fiber lining; 120, Fiber module installation and fixing components; 130, Bending channel plate; 131, Steel plate body; 132, Folded edge; 140, Channel plate hanger; 150, Installation joint; 160, Wide joint gap; 170, Seam-sealed fiber blanket; 180, Seam-sealed fiber board; 200, Furnace top steel beam; 210, Furnace top hanging small steel. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The features and performance of the all-fiber furnace top structure of the steel rolling heating furnace of this application will be further described in detail below with reference to the embodiments.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this application provides a full fiber optic furnace top structure for a steel rolling heating furnace, which is an important component of the refractory material masonry of the heating furnace body. It mainly includes a high-temperature resistant fiber module layer 100 composed of sequentially arranged high-temperature resistant fiber modules 101, spaced-apart heat-insulating fiber liners 110, fiber module mounting and fixing components 120 for fixing the heat-insulating fiber liners 110 to the top surface of the corresponding high-temperature resistant fiber module layer 100, furnace top steel beams 200 spaced along the length of the heating furnace, spaced-apart furnace top hanging small steel beams 210 perpendicular to the furnace top steel beams 200, and bent grooved plates 130 corresponding one-to-one with the heat-insulating fiber liners 110. Each furnace top hanging small steel beam 210 is connected to each furnace top steel beam 200, and each bent grooved plate 130 abuts against the top surface of the corresponding heat-insulating fiber liner 110. Each bent grooved plate 130 has a pair of hanging small steel beams 210 connected to its top end. The L-shaped channel plate hanger 140 of the steel section 210 is connected to the top of a bent channel plate 130 for each fiber module mounting and fixing component 120. The fiber module mounting and fixing component 120 includes a screw and a nut corresponding to the bolt. The bent channel plate 130 includes a steel plate body 131, and the four sides of the steel plate body 131 are bent in the same direction to form folded edges 132. An installation joint 150 is provided between two high-temperature resistant fiber modules 101 arranged adjacent to each other along the length of the heating furnace. A wide gap 160 is provided at the top of the installation joint 150 between the two bent channel plates 130. A press-fit fiber blanket 170 is provided in the wide gap 160. A press-fit fiber board 180 is provided at the top of the press-fit fiber blanket 170. An expansion gap is provided between two bent channel plates 130 arranged adjacent to each other along the width of the heating furnace. The length of the expansion gap is 20-25mm, and the length of the wide gap 160 is 150-250mm. In this embodiment, the length of the expansion gap is 20mm, and the length of the wide gap 160 is 200mm.

[0030] The all-fiber furnace top structure for steel rolling heating furnaces provided in this application embodiment presses a corresponding bent channel plate 130 against the top surface of each heat-insulating fiber liner 110, and connects the fiber module mounting and fixing assembly 120, which fixes the heat-insulating fiber liner 110 and the corresponding high-temperature resistant fiber module layer 100, to the bent channel plate 130. This connects and assembles the bent channel plate 130, the heat-insulating fiber liner 110, and the high-temperature resistant fiber module layer 100 to form an integral mounting surface. Channel plate hanging parts 140, which are suspended from the furnace top hanging small steel 210, are respectively set at both ends of the top of the bent channel plate 130. This can stably connect the bent channel plate 130, the heat-insulating fiber liner 110, and the high-temperature resistant fiber module layer 100 to the furnace top hanging small steel 210 and the furnace top steel beam 200. This not only facilitates installation but also effectively improves the structural strength and load-bearing capacity of the all-fiber furnace top structure for steel rolling heating furnaces.

[0031] The all-fiber furnace roof structure of the steel rolling heating furnace has an expansion gap between two adjacent bent channel plates 130 arranged along the width direction of the heating furnace, and a wide gap 160 between two adjacent bent channel plates 130 arranged along the length direction of the heating furnace. This effectively solves the problem of thermal expansion deformation of the steel structure in the all-fiber furnace roof structure of the steel rolling heating furnace, and avoids tearing damage to the high-temperature resistant fiber modules 101 caused by thermal expansion deformation. A wide gap 160 is provided at the top of the joint 150 between the two adjacent high-temperature resistant fiber modules 101 arranged along the length direction of the heating furnace, located between the two bent channel plates 130. Within the wide gap 160... The structure includes a fiber blanket 170 and a fiber board 180 above it. The fiber blanket 170 can be used to cover the installation joint 150, thus preventing the installation joint 150 from glowing red and catching fire due to the shrinkage of the high-temperature resistant fiber module 101, and avoiding damage to the furnace top steel beam 200 and the furnace top hanging small steel 210. This enhances the stability of the furnace top steel beam 200 and the furnace top hanging small steel 210, extends the service life of the all-fiber furnace top structure of the steel rolling heating furnace, and facilitates the repair and replacement of the bent channel plate 130, channel plate hanger 140, and furnace top hanging small steel 210 when they are partially damaged or glowing red.

[0032] For ease of viewing, the accompanying drawings of this application embodiment only show a partial structure of the all-fiber furnace top structure of the steel rolling heating furnace. The dimensions and specific quantities of the high-temperature resistant fiber module 101, heat insulation fiber lining 110, fiber module installation and fixing assembly 120, bent channel plate 130, channel plate hanging component 140, seam fiber blanket 170, seam fiber board 180, furnace top steel beam 200, and furnace top hanging small steel 210 in the all-fiber furnace top structure also need to be adjusted according to the actual size and requirements of the heating furnace. Therefore, the specific dimensions and quantities of the above components are not described in detail in the embodiment.

[0033] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A full fiber furnace top structure for a steel rolling heating furnace, comprising a high-temperature resistant fiber module layer composed of multiple high-temperature resistant fiber modules, multiple heat-insulating fiber liners, and multiple fiber module mounting and fixing components, wherein the fiber module mounting and fixing components are used to fix the heat-insulating fiber liners to the top surface of the high-temperature resistant fiber module layer, characterized in that, It also includes multiple furnace top steel beams, multiple furnace top hanging small steel beams, and multiple bent channel plates. Each of the furnace top hanging small steel beams is connected to each of the furnace top steel beams. Each of the bent channel plates abuts against the top surface of the heat insulation fiber lining. Each of the bent channel plates is connected to at least two pairs of channel plate hanging parts that are suspended from the furnace top hanging small steel beams. The top of the fiber module installation and fixing assembly is connected to the corresponding bent channel plate. An installation joint is provided between two adjacent high-temperature resistant fiber modules arranged along the length direction of the heating furnace. The top of the installation joint is provided with a wide gap located between the two bent channel plates. A pressure fiber blanket is provided in the wide gap. An expansion gap is provided between two adjacent bent channel plates arranged along the width direction of the heating furnace.

2. The all-fiber furnace roof structure of the steel rolling heating furnace according to claim 1, characterized in that, The length of the expansion gap is 20-25 mm.

3. The all-fiber furnace roof structure of the steel rolling heating furnace according to claim 1, characterized in that, The top of the stitched fiber blanket is provided with a stitched fiber board.

4. The all-fiber furnace roof structure of the steel rolling heating furnace according to claim 3, characterized in that, The length of the wide slit gap is 150-250mm.

5. The all-fiber furnace roof structure of the steel rolling heating furnace according to claim 1, characterized in that, The bent grooved plate includes a steel plate body, and the four sides of the steel plate body are bent in the same direction to form folded edges.

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