A nano-modified refractory brick heat insulation structure

Abstract

This utility model relates to the technical field of refractory materials and discloses a heat insulation structure for nano-modified refractory bricks. The structure is applied to the brick body, with a snap-fit ​​mechanism fixedly installed on the outer surface. The brick body includes a silicon-muzzle red brick matrix, with a support frame fixedly installed on the outer surface. A heat insulation block is fixedly installed on the inner surface of the support frame. A nano-reflective coating is fixedly installed on the top of both the support frame and the heat insulation block. This heat insulation structure of the nano-modified refractory brick, through its multi-layered stepped brick body, utilizes aerogel to block conduction, ceramic fibers to buffer thermal stress, and a reflective layer to reduce radiative heat transfer, achieving a comprehensive thermal conductivity as low as 0.8 W / m·K. This improves the heat insulation effect of a single nano-modified silicon-muzzle red brick. The dovetail blocks and dovetail grooves interlock to form a composite structure, which is then coated with a high-temperature resistant adhesive and stacked. When the bricks are stacked into a furnace, the high temperature inside the furnace will burn away the sodium carbonate shell inside the dovetail blocks.

Description

Technical Field

[0001] This utility model relates to the technical field of refractory materials, and in particular to a heat insulation structure of nano-modified refractory bricks. Background Technology

[0002] Nano-modified refractory bricks are high-performance, high-temperature resistant materials created by combining nanomaterials (such as nano-alumina, silicon carbide, or zirconium dioxide) with traditional refractory matrices. Their nanostructure significantly improves the brick's density, thermal shock resistance, and erosion resistance, while also enhancing mechanical strength and wear resistance. Nano-modified mullite red brick is a novel high-performance refractory material combining nanotechnology and traditional refractory materials, primarily used in high-temperature industrial equipment such as cement kilns. Mullite red brick is a high-performance refractory material with mullite as its main crystalline phase, possessing excellent wear resistance, low thermal conductivity, high thermal shock resistance, and resistance to chemical erosion. By introducing nanoscale materials (such as nano-silica and nano-silicon carbide), the density, thermal shock resistance, and wear resistance of mullite red brick can be significantly improved. The introduction of nanomaterials optimizes the microstructure, reduces porosity, and further lowers the thermal conductivity, improving energy efficiency.

[0003] Traditional silica-molybdenum red bricks for cement kilns are widely used in high-temperature areas such as transition and cooling zones of cement kilns due to their excellent wear resistance, low thermal conductivity, and thermal shock resistance. However, in traditional masonry methods, insulation materials (such as calcium silicate boards and ceramic fiber boards) are easily damaged or fall off during construction due to mechanical impact or thermal stress, affecting the insulation effect. Traditional masonry methods rely on manual adjustment, and there are many joints between the bricks and insulation materials, resulting in thermal bridging and reducing the overall insulation performance. Utility Model Content

[0004] Given that the existing nano-modified silicon-molybdenum red bricks are prone to damaging the insulation material during the masonry process, and that there are many joints between the bricks and the insulation material in the traditional masonry process, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a heat insulation structure for nano-modified refractory bricks, the purpose of which is that the heat insulation material will not be damaged during the construction of nano-modified silica-molybdenum red bricks, and the heat insulation material will fill the entire gap after construction, ensuring that the nano-modified silica-molybdenum red bricks have a good heat insulation effect.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a heat insulation structure for nano-modified refractory bricks, applied to the brick body, wherein a snap-fit ​​mechanism is fixedly installed on the outer surface of the brick body;

[0007] The brick body includes a silicon-muzzle red brick base, a support frame is fixedly installed on the outer surface of the silicon-muzzle red brick base, a heat insulation block is fixedly installed on the inner surface of the support frame, and a nano-reflective coating is fixedly installed on the top of both the support frame and the heat insulation block.

[0008] As a preferred embodiment of the heat insulation structure of the nano-modified refractory brick of this utility model, the snap-fit ​​mechanism includes a dovetail groove, which is opened on the left side of the brick body.

[0009] As a preferred embodiment of the heat insulation structure of the nano-modified refractory brick of this utility model, the snap-fit ​​mechanism further includes a dovetail block, the left side of which is fixedly connected to the right side of the brick body.

[0010] As a preferred embodiment of the heat insulation structure of the nano-modified refractory brick of this utility model, the snap-fit ​​mechanism further includes a sodium carbonate shell, the outer surface of which is fixedly connected to the inner surface of the dovetail block, and water glass is fixedly installed on the inner surface of the sodium carbonate shell.

[0011] As a preferred embodiment of the heat insulation structure of the nano-modified refractory brick of this utility model, the support frame is made of ceramic fiber and the heat insulation block is made of nano-aerogel.

[0012] As a preferred embodiment of the heat insulation structure of the nano-modified refractory brick of this utility model, the thickness of the support frame is 20 mm, and the thickness of the heat insulation block is 5 to 10 mm.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects:

[0014] 1. This utility model improves the thermal insulation effect of a single nano-modified silicon-molybdenum red brick by adding a multi-layered stepped high-temperature resistant design and using the silicon-molybdenum red brick matrix and support frame in combination with the heat insulation block and nano-reflective coating. This is achieved by utilizing the blocking conduction of aerogel, the buffering of thermal stress by ceramic fibers, and the ability of the reflective layer to reduce radiative heat transfer, thereby significantly reducing the thermal conductivity.

[0015] 2. This utility model improves the rigidity and seamlessness of the nano-modified silica-molybdenum red brick matrix by adding a more secure design. The bricks are joined with dovetail grooves and blocks, which in turn are used in conjunction with the calcium carbonate shell and water glass. This allows the nano-modified silica-molybdenum red brick matrix to be connected using a tenon-and-mortise interlocking method, increasing the strength between the bricks. Simultaneously, the high-temperature reaction between the water glass and calcium carbonate causes expansion, filling each gap and preventing heat from escaping. This enhances the high-temperature insulation effect of the nano-modified silica-molybdenum red brick matrix within the furnace. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the heat insulation structure of the nano-modified refractory brick of this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of the heat insulation structure of the nano-modified refractory brick of this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the support frame and insulation block of the insulation structure of the nano-modified refractory brick of this utility model;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the dovetail block in the heat insulation structure of the nano-modified refractory brick of this utility model;

[0020] Figure 5 This is a partial cross-sectional view of the sodium carbonate shell structure of the heat insulation structure of the nano-modified refractory brick of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Brick body; 11. Silicon-molybdenum red brick base; 12. Support frame; 13. Insulation block; 14. Nano-reflective coating; 2. Snap-fit ​​mechanism; 21. Dovetail groove; 22. Dovetail block; 23. Sodium carbonate shell; 24. Water glass. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example

[0024] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a heat insulation structure for nano-modified refractory bricks. This heat insulation structure for nano-modified refractory bricks is applied to brick body 1, and a snap-fit ​​mechanism 2 is fixedly installed on the outer surface of brick body 1.

[0025] The brick body 1 includes a silicon-muzzle red brick base 11, a support frame 12 is fixedly installed on the outer surface of the silicon-muzzle red brick base 11, a heat insulation block 13 is fixedly installed on the inner surface of the support frame 12, and a nano-reflective coating 14 is fixedly installed on the top of both the support frame 12 and the heat insulation block 13.

[0026] The nano-modified silicon-modified red brick substrate 11 has a thickness of 80-100mm. The wear resistance and chemical corrosion resistance are enhanced by nano-silicon carbide. It is coated with C-COAT nano-reflective coating (containing Al2O3 / SiO2 composite coating) and formed into a 0.2-0.5mm thin film with a reflectivity ≥90% by vacuum spraying process.

[0027] The support frame 12 is made of ceramic fiber, and the heat insulation block 13 is made of nano-aerogel.

[0028] The support frame 12 is 20 mm thick and has a temperature resistance of ≥1300℃. It serves as a support and buffer. The heat insulation block 13 is 5 to 10 mm thick and has a thermal conductivity of ≤0.02 W / m·K. It is filled with a microporous structure to block heat conduction.

[0029] During use, the brick body 1 is composed of multiple steps. Aerogel blocks conduction, ceramic fiber buffers thermal stress, and reflective layer reduces radiative heat transfer. The overall thermal conductivity can be reduced to 0.8 W / m·K, thereby improving the heat insulation effect of a single nano-modified silicon molybdenum brick. Example

[0030] Reference Figure 4 and Figure 5 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the snap-fit ​​mechanism 2 includes a dovetail groove 21, which is opened on the left side of the brick body 1.

[0031] The snap-fit ​​mechanism 2 also includes a dovetail block 22, the left side of which is fixedly connected to the right side of the brick body 1.

[0032] The snap-fit ​​mechanism 2 also includes a sodium carbonate shell 23, the outer surface of which is fixedly connected to the inner surface of the dovetail block 22, and water glass 24 is fixedly installed on the inner surface of the sodium carbonate shell 23.

[0033] Sodium carbonate shell 23 decomposes at high temperature: Na2CO3 → Na2O + CO2↑. Na2O and CO2 can react with water glass (Na2SiO3) to form a more stable silicate structure. Water glass 24 is a colorless or pale yellow viscous liquid. At high temperatures (>500°C), the water in water glass 24 evaporates and may decompose to produce gases (such as CO2), forming a microporous structure and causing expansion.

[0034] During use, the dovetail block 22 and the dovetail groove 21 are interlocked to form a joint. Then, a high-temperature resistant adhesive is applied and the blocks are stacked. When the bricks 1 are stacked into a furnace, the high temperature inside the furnace will burn the sodium carbonate shell 23 inside the dovetail block 22. The sodium oxide and carbon dioxide produced by its decomposition react with the water glass 24 to form a microporous structure, which expands and fills the gap between the dovetail groove 21 and the dovetail block 22. This structure also has a high-temperature resistance effect to ensure that no heat escapes from the entire furnace stacked with bricks 1.

[0035] The remaining structure is the same as that in Example 1.

[0036] Based on embodiments 1-5, the working principle of this utility model is as follows: The user first interlocks the bricks 1 with each other, and interlocks the dovetail block 22 with the dovetail groove 21 to splice them together. Then, a high-temperature resistant adhesive is applied and the bricks are stacked. When the bricks 1 are stacked into a furnace, the high temperature inside the furnace will burn the sodium carbonate shell 23 inside the dovetail block 22. The sodium oxide and carbon dioxide produced by its decomposition react with the water glass 24 to form a microporous structure, which expands and fills the gap between the dovetail groove 21 and the dovetail block 22. This structure also has a high-temperature resistance effect to ensure that the furnace stacked with bricks 1 will not have heat overflow. At the same time, the bricks 1 are composed of multiple steps. Aerogel blocks conduction, ceramic fiber buffers thermal stress, and the reflective layer reduces radiative heat transfer. The overall thermal conductivity can be reduced to 0.8 W / m·K, thereby improving the heat insulation effect of a single nano-modified silicon molybdenum red brick.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A thermal insulation structure of nanomodified refractory brick, applied to a brick body (1), characterized in that: A snap-fit ​​mechanism (2) is fixedly installed on the outer surface of the brick (1); The brick body (1) includes a silicon-molybdenum red brick base (11), a support frame (12) is fixedly installed on the outer surface of the silicon-molybdenum red brick base (11), a heat insulation block (13) is fixedly installed on the inner surface of the support frame (12), and a nano-reflective coating (14) is fixedly installed on the top of both the support frame (12) and the heat insulation block (13).

2. The thermal insulation structure of the nano-modified refractory brick according to claim 1, characterized in that: The snap-fit ​​mechanism (2) includes a dovetail groove (21), which is located on the left side of the brick body (1).

3. The thermal insulation structure of the nano-modified refractory brick according to claim 1, characterized in that: The snap-fit ​​mechanism (2) also includes a dovetail block (22), the left side of which is fixedly connected to the right side of the brick (1).

4. The thermal insulation structure of the nano-modified refractory brick according to claim 1, characterized in that: The snap-fit ​​mechanism (2) also includes a sodium carbonate shell (23), the outer surface of which is fixedly connected to the inner surface of the dovetail block (22), and water glass (24) is fixedly installed on the inner surface of the sodium carbonate shell (23).

5. The thermal insulation structure of the nano-modified refractory brick according to claim 1, characterized in that: The support frame (12) is made of ceramic fiber, and the heat insulation block (13) is made of nano-aerogel.

6. The thermal insulation structure of the nano-modified refractory brick according to claim 1, characterized in that: The thickness of the support frame (12) is 20 mm, and the thickness of the heat insulation block (13) is 5 to 10 mm.

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