Stability-resistant high-temperature brick for furnace mouth
By using high-temperature bricks with composite structures, and incorporating designs such as carbon nanotube networks, serpentine channels, porous structures, and stainless steel fibers, the problem of insufficient heat insulation and thermal shock resistance in the furnace opening area of traditional high-temperature bricks has been solved. This achieves efficient heat insulation, rapid heat dissipation, and high strength, extending service life and reducing maintenance costs.
Patent Information
- Application Number
- CN202520590435.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-31
AI Technical Summary
Traditional high-temperature bricks have limited heat insulation performance and poor thermal shock resistance at the furnace opening, resulting in serious heat loss, short service life, and insufficient mechanical strength and impact resistance, which cannot meet the harsh operating conditions of high-temperature furnaces.
The high-temperature brick with a composite structure includes a high-temperature resistant inner layer, a heat-insulating middle layer, and a reinforcing outer layer. The inner layer contains a carbon nanotube network and serpentine channels, the middle layer has a porous structure, and the outer layer is inlaid with stainless steel fibers. Ceramic fiber bundles run through the entire structure, and the aluminum titanate transition layer buffers the difference in thermal expansion, improving thermal conductivity, heat insulation, thermal shock resistance, and mechanical strength.
It improves the thermal insulation performance and service life of the furnace opening material, enhances its thermal shock resistance and mechanical strength, reduces heat loss, extends service life, and lowers maintenance costs.
Smart Images
Figure CN223925416U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-temperature brick technology, specifically to high-temperature bricks with anti-stability for furnace openings. Background Technology
[0002] In modern industrial production, high-temperature furnaces are widely used in many fields such as metallurgy, glass, ceramics, and chemicals. They are key equipment for realizing various high-temperature processes. When these high-temperature furnaces are running, the furnace opening is in direct contact with high-temperature materials, flames, and high-temperature airflow. The working conditions are extremely harsh, which places extremely high demands on the performance of the furnace opening material.
[0003] Currently, there are various types of high-temperature bricks used for furnace openings on the market, including high-alumina bricks and clay bricks. High-alumina bricks have certain high-temperature resistance due to their high alumina content; clay bricks are used in some situations due to their lower cost. These traditional high-temperature bricks have played a certain role in their respective application scenarios.
[0004] However, traditional high-temperature bricks have many shortcomings when applied to furnace openings. On the one hand, high-alumina bricks and clay bricks have limited thermal insulation properties. During the operation of high-temperature furnaces, a large amount of heat is lost through the furnace opening, which not only wastes energy but also affects the stable control of the furnace temperature and reduces production efficiency. On the other hand, they have poor thermal shock resistance. During frequent furnace start-ups and shutdowns, the temperature at the furnace opening changes drastically, which can easily lead to cracking and peeling of the bricks, seriously affecting the service life of high-temperature bricks and increasing equipment maintenance costs and downtime. In addition, the mechanical strength and impact resistance of traditional high-temperature bricks are also difficult to meet the requirements of the furnace opening during material loading, unloading, and collision operations, further limiting their application effect at the furnace opening. Therefore, we propose high-temperature bricks with anti-stability properties for furnace openings. Utility Model Content
[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-temperature brick for furnace opening with high stability, which has the advantages of efficient heat insulation, rapid heat dissipation, high strength, thermal shock resistance and crack resistance, and can effectively improve the performance and service life of furnace opening materials, and can effectively solve the problems in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature brick with anti-stability for furnace openings, comprising a brick body;
[0007] The brick body comprises a high-temperature resistant inner layer, a heat-insulating intermediate layer, and a reinforcing outer layer. A transition layer is provided between the rear side of the heat-insulating intermediate layer and the front side of the high-temperature resistant inner layer, as well as between the front side of the heat-insulating intermediate layer and the rear side of the reinforcing outer layer. The interior of the high-temperature resistant inner layer, the heat-insulating intermediate layer, and the reinforcing outer layer is equipped with ceramic fiber bundles, which have advantages such as high-efficiency heat insulation, rapid heat dissipation, high strength, thermal shock resistance, and crack resistance, and can effectively improve the performance and service life of the furnace mouth material.
[0008] Furthermore, the high-temperature resistant inner layer includes an inner brick body and a carbon nanotube network. The inner brick body has an array of carbon nanotube networks inside, and the surface of the inner brick body is coated with a composite film to improve the thermal conductivity and mechanical strength of the inner layer.
[0009] Furthermore, the high-temperature resistant inner layer also includes serpentine channels. The inner layer brick has evenly distributed serpentine channels inside, and the inside of each serpentine channel is filled with thermal conductive paste, which can quickly dissipate heat, avoid local overheating, and improve the overall heat dissipation performance.
[0010] Furthermore, the heat insulation intermediate layer includes an intermediate layer brick and pores. The rear side of the intermediate layer brick is connected to the front side of the inner layer brick through a transition layer. The interior of the intermediate layer brick has uniformly distributed pores at both the front and rear ends, and the pores are interconnected to form a highly efficient heat insulation barrier, reducing the transfer of heat to the outside.
[0011] Furthermore, the reinforcing outer layer includes an outer brick body, a network of stainless steel fibers, and holes. The rear side of the outer brick body is connected to the front side of the middle brick body through a transition layer. The outer brick body is inlaid with a network of stainless steel fibers, and the surface of the outer brick body has evenly distributed holes. The inlaid stainless steel fibers significantly improve the tensile strength, impact resistance, and high-temperature oxidation resistance of the outer layer.
[0012] Furthermore, the transition layer is an aluminum titanate transition layer. The low coefficient of thermal expansion of aluminum titanate can effectively buffer the difference in thermal expansion between the inner layer, the middle layer and the outer layer, reduce stress concentration at the interface, and prevent interlayer peeling or cracking.
[0013] Furthermore, the ceramic fiber bundles are embedded throughout the interior of the outer, middle, and inner brick layers, forming a three-dimensional reinforcement network. This significantly improves the interlayer bonding strength, thermal shock resistance, and overall structural strength of the composite material, ensuring structural stability under high-temperature conditions.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This furnace mouth anti-stability high-temperature brick has the following advantages:
[0015] This high-temperature brick with high stability features a composite structure. The carbon nanotube network and serpentine channels in the high-temperature resistant inner layer enhance thermal conductivity and heat dissipation, while the composite membrane strengthens mechanical strength and high-temperature resistance. The porous structure of the insulating middle layer forms a highly efficient thermal barrier, and the different porosities at the beginning and end reduce heat transfer. The network of stainless steel fibers in the reinforcing outer layer improves tensile strength, impact resistance, and high-temperature oxidation resistance. Ceramic fiber bundles run through all three layers, enhancing interlayer bonding, thermal shock resistance, and overall structural strength. The aluminum titanate transition layer buffers differences in thermal expansion and reduces stress concentration. These designs enable the high-temperature brick to perform exceptionally well in terms of high-temperature resistance, thermal insulation, mechanical properties, and thermal expansion adaptability. It can effectively resist the harsh conditions of high temperature, erosion, mechanical impact, and thermal shock at the furnace opening, maintaining structural integrity and performance stability. Compared with traditional furnace opening bricks, it significantly extends service life, reduces the frequency of furnace opening maintenance and replacement, and lowers production costs. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the overall explosion structure of this utility model;
[0018] Figure 3 This is a structural schematic diagram showing a cross-section of the upper end of the inner layer brick of this utility model;
[0019] Figure 4 This is a partial cross-sectional structural diagram of the inner brick body of this utility model;
[0020] Figure 5 This is a partial structural diagram of the intermediate layer brick of this utility model;
[0021] Figure 6 This is a partial cross-sectional structural diagram of the outer brick body of this utility model;
[0022] Figure 7 This is an enlarged structural diagram of point A of this utility model.
[0023] In the figure: 1 brick body, 11 high temperature resistant inner layer, 111 inner brick body, 112 carbon nanotube network, 113 serpentine channel, 12 heat insulation intermediate layer, 121 intermediate brick body, 122 pores, 13 reinforcing outer layer, 131 outer brick body, 132 network stainless steel fiber, 133 pores, 2 aluminum titanate transition layer, 3 ceramic fiber bundle. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1-7 This embodiment provides a technical solution: a high-temperature brick with resistance to stability for furnace openings, comprising a brick body 1;
[0026] Brick 1: It includes a high-temperature resistant inner layer 11, a heat-insulating intermediate layer 12, and a reinforcing outer layer 13. Transition layers are provided between the rear side of the heat-insulating intermediate layer 12 and the front side of the high-temperature resistant inner layer 11, and between the front side of the heat-insulating intermediate layer 12 and the rear side of the reinforcing outer layer 13. The interior of the high-temperature resistant inner layer 11, the heat-insulating intermediate layer 12, and the reinforcing outer layer 13 is composed of ceramic fiber bundles 3. The high-temperature resistant inner layer 11 includes an inner brick body 111 and a carbon nanotube network 112. The interior of the inner brick body 111 contains an array of carbon nanotube networks 112 (the inner brick body 111 is a corundum-silicon carbide matrix, and the inner brick body 111 and the carbon nanotube network 112 form a physical interlocking). The surface of the inner brick body 111 is coated with a composite film (the composite film is Z). The high-temperature resistant inner layer 11 also includes serpentine channels 113. The inner layer brick 111 has uniformly distributed serpentine channels 113 inside, and each serpentine channel 113 is filled with thermal grease (conventional silicone thermal grease). The heat-insulating intermediate layer 12 includes an intermediate layer brick 121 and pores 122. The rear side of the intermediate layer brick 121 is connected to the front side of the inner layer brick 111 through a transition layer. The intermediate layer brick 121 has uniformly distributed pores 122 at both its front and rear ends (the intermediate layer brick 121 is made of alumina ceramic; the porosity of the pores 122 in the rear half is 35%, and the porosity of the pores 122 in the front half is 15%, forming a continuously transitioning porous structure). The pores 122 are interconnected. The reinforcing outer layer 13 includes an outer brick body 131, a network of stainless steel fibers 132, and pores 133. The network of stainless steel fibers 132 is embedded inside the outer brick body 131 (the outer brick body 131 is a mullite-based composite material). The rear side of the outer brick body 131 is also connected to the front side of the middle brick body 121 through a transition layer. The surface of the outer brick body 131 has uniformly distributed pores 133. The transition layer is an aluminum titanate transition layer 2. Ceramic fiber bundles 3 are arranged throughout the interior of the outer brick body 131, the middle brick body 121, and the inner brick body 111, forming a whole. In the high-temperature environment of the furnace mouth, the various parts of this furnace mouth high-temperature brick with high stability work together, and the high-temperature resistant inner layer 11 plays a key role. The inner layer brick 111 features an array of carbon nanotube networks 112. Leveraging the excellent thermal conductivity of carbon nanotubes, this enhances the thermal conductivity of the inner layer, enabling rapid heat transfer from the furnace. Simultaneously, the physical integration of the carbon nanotube network 112 with the inner layer brick 111, along with the ZrO2-SiO2 composite film coating on the surface, strengthens the mechanical properties of the inner layer, making it less prone to damage at high temperatures. The serpentine channels 113, uniformly distributed and filled with thermally conductive paste within the inner layer brick 111, facilitate rapid heat dissipation. The heat is dispersed and transferred along these channels by the thermally conductive paste, preventing localized overheating and further improving overall heat dissipation performance. The intermediate layer brick 121 of the insulation intermediate layer 12 contains evenly distributed and interconnected pores 122 at both ends.This forms a highly efficient heat insulation barrier. The porosity of the rear half is 35%, while that of the front half is 15%. This continuously transitioning porous structure effectively blocks heat transfer from the high-temperature resistant inner layer 11 to the reinforced outer layer 13, reducing heat loss. The network of stainless steel fibers 132 embedded inside the outer brick 131 of the reinforced outer layer 13 significantly improves the tensile strength, impact resistance, and high-temperature oxidation resistance of the outer layer. Even under external impact or high-temperature oxidation, it can maintain structural stability. The uniformly distributed pores 133 on the surface of the outer brick 131, formed by a foaming process to create a micron-level closed-cell structure, buffer mechanical stress and reduce thermal conductivity. The aluminum titanate transition layer 2 is located between the intermediate brick 121 and the inner brick 111, and the intermediate layer. Between brick 121 and outer brick 131, the low coefficient of thermal expansion of aluminum titanate effectively buffers the stress caused by the difference in thermal expansion between the inner, middle, and outer layers, reducing stress concentration at the interface and preventing interlayer delamination or cracking. Ceramic fiber bundles 3, evenly distributed and penetrating the outer brick 131, middle brick 121, and inner brick 111, form a three-dimensional reinforcement network. This network significantly improves the interlayer bonding strength of the composite material, ensuring a tight bond between the layers; it also enhances the thermal shock resistance of the brick, maintaining structural stability even under rapid temperature changes; and it improves the overall structural strength, ensuring that the brick will not easily deform or be damaged in high-temperature environments, thus guaranteeing the normal use and stability of the furnace opening and increasing the stability of the high-temperature brick.
[0027] The working principle of the high-temperature resistant brick for furnace opening provided by this utility model is as follows: Under the high-temperature environment of the furnace opening, all parts of this high-temperature resistant brick for furnace opening work together. The high-temperature resistant inner layer 11 plays a key role. The carbon nanotube network 112 arrayed within the inner layer brick 111, with the excellent thermal conductivity of carbon nanotubes, improves the thermal conductivity efficiency of the inner layer, enabling rapid heat transfer from the furnace. At the same time, the physical integration of the carbon nanotube network 112 with the inner layer brick 111 and the ZrO2-SiO2 composite film coated on the surface enhance the mechanical strength of the inner layer, making it less prone to damage at high temperatures. The serpentine channels 113, uniformly distributed and filled with thermal grease, can quickly dissipate heat. Under the action of the thermal grease, heat is dispersed and transferred along the serpentine channels, preventing localized overheating and further improving overall heat dissipation performance. The intermediate brick 121 of the insulating intermediate layer 12 has evenly distributed and interconnected pores 122 at both ends, forming a highly efficient heat insulation barrier. The porosity of the rear half is 35%, and the porosity of the front half is 15%. This continuously transitioning porous structure effectively blocks heat transfer from the high-temperature resistant inner layer 11 to the reinforced outer layer 13, reducing heat loss and strengthening the outer layer. The outer layer brick 131, with its internally embedded network of stainless steel fibers 132, significantly improves the tensile strength, impact resistance, and high-temperature oxidation resistance of the outer layer. Even under external impact or high-temperature oxidation conditions, it maintains structural stability. The uniformly distributed pores 133 on the surface of the outer layer brick 131, formed through a foaming process to create a micron-level closed-cell structure, buffer mechanical stress and reduce thermal conductivity. The aluminum titanate transition layer 2, located between the intermediate layer brick 121 and the inner layer brick 111, and between the intermediate layer brick 121 and the outer layer brick 131, effectively buffers the stresses of the inner and middle layers by utilizing the low coefficient of thermal expansion of aluminum titanate. The stress generated by the difference in thermal expansion between the interlayer and the outer layer reduces stress concentration at the interface, preventing interlayer delamination or cracking. The ceramic fiber bundles 3, which are evenly distributed and penetrate the outer brick 131, the intermediate brick 121 and the inner brick 111, form a three-dimensional reinforcement network. This network greatly improves the interlayer bonding force of the composite material, making each layer tightly bonded into a whole. At the same time, it enhances the thermal shock resistance of the brick, maintaining structural stability even when the temperature changes drastically. It also improves the overall structural strength, ensuring that the brick will not easily deform or be damaged in high-temperature environments, thereby ensuring the normal use and stability of the furnace opening.
[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A high-temperature brick with resistance to stability for furnace openings, characterized in that: Including brickwork (1); Brick body (1): It includes a high-temperature resistant inner layer (11), a heat-insulating intermediate layer (12) and a reinforcing outer layer (13). A transition layer is provided between the rear side of the heat-insulating intermediate layer (12) and the front side of the high-temperature resistant inner layer (11), and between the front side of the heat-insulating intermediate layer (12) and the rear side of the reinforcing outer layer (13). The interior of the high-temperature resistant inner layer (11), the heat-insulating intermediate layer (12) and the reinforcing outer layer (13) is provided with ceramic fiber bundles (3).
2. The high-temperature resistant brick for furnace opening according to claim 1, characterized in that: The high-temperature resistant inner layer (11) includes an inner brick body (111) and a carbon nanotube network (112). The inner brick body (111) has an array of carbon nanotube networks (112) inside, and the surface of the inner brick body (111) is coated with a composite film.
3. The high-temperature resistant brick for furnace opening according to claim 2, characterized in that: The high-temperature resistant inner layer (11) also includes serpentine channels (113). The inner layer brick (111) has uniformly distributed serpentine channels (113) inside, and the inside of each serpentine channel (113) is filled with thermal conductive paste.
4. The high-temperature resistant brick for furnace opening according to claim 2, characterized in that: The heat insulation intermediate layer (12) includes an intermediate layer brick (121) and pores (122). The rear side of the intermediate layer brick (121) is connected to the front side of the inner layer brick (111) through a transition layer. The intermediate layer brick (121) has uniformly distributed pores (122) at both the front and rear ends inside, and the pores (122) are interconnected.
5. The high-temperature resistant brick for furnace opening according to claim 4, characterized in that: The reinforcing outer layer (13) includes an outer brick body (131), a network of stainless steel fibers (132), and holes (133). The rear side of the outer brick body (131) is connected to the front side of the middle brick body (121) through a transition layer. The outer brick body (131) is inlaid with network of stainless steel fibers (132), and the surface of the outer brick body (131) is provided with uniformly distributed holes (133).
6. The high-temperature resistant brick for furnace opening according to claim 1, characterized in that: The transition layer is an aluminum titanate transition layer (2).
7. The high-temperature resistant brick for furnace opening according to claim 5, characterized in that: The ceramic fiber bundle (3) is disposed throughout the interior of the outer brick layer (131), the middle brick layer (121) and the inner brick layer (111) that together form a whole.