Mullite fiber refractory brick
By introducing limiting blocks and limiting shaft structures into mullite fiber refractory bricks, and adding silicon carbide fibers and coatings inside, the problems of low mechanical strength and inconvenient splicing are solved, achieving higher impact resistance and chemical corrosion resistance, and simplifying the installation process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU RUITAIKE REFRACTORY MATERIALS CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-06-26
AI Technical Summary
Existing mullite fiber refractory bricks have low mechanical strength, are prone to cracking and peeling, and are inconvenient to align.
A rectangular limiting block and limiting shaft structure were designed, along with a plug-in groove and a positioning groove, to enhance the alignment and positioning capability of the brick. Silicon carbide fibers and a coating were added to the brick to improve its mechanical strength and resistance to chemical corrosion.
It improves the impact resistance and flexural strength of the bricks, prevents cracking and peeling, simplifies the splicing process, and enhances the practicality of the structure.
Smart Images
Figure CN224415720U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refractory brick technology, specifically a mullite fiber refractory brick. Background Technology
[0002] Mullite fiber refractory bricks are high-performance refractory materials made primarily of mullite fiber, combined with high-temperature reinforcing materials and functional coatings. They are mainly used for heat insulation, heat preservation, and structural support in high-temperature environments, and are commonly found in industrial kilns, heat treatment equipment, high-temperature furnaces, and other similar applications.
[0003] Existing mullite fiber refractory bricks still have some defects, such as low mechanical strength, easy cracking and peeling, and inconvenience in splicing and alignment. Therefore, a mullite fiber refractory brick is proposed to solve the above-mentioned technical problems. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a mullite fiber refractory brick with advantages such as high mechanical strength and easy alignment. It solves some of the defects of existing mullite fiber refractory bricks, such as low mechanical strength, easy cracking and peeling, and inconvenience in splicing and alignment.
[0006] (II) Technical Solution
[0007] To address the shortcomings of existing mullite fiber refractory bricks, such as low mechanical strength leading to cracking and spalling, and inconvenience in splicing and alignment, this utility model provides the following technical solution: a mullite fiber refractory brick, comprising two refractory bricks symmetrically distributed vertically, two rectangular limiting blocks symmetrically distributed horizontally at the bottom of each of the two refractory bricks, two limiting shafts symmetrically distributed vertically on the right side wall of each of the two refractory bricks, and two insertion slots symmetrically distributed horizontally at the top of each of the two refractory bricks, the insertion slots being adapted to the rectangular limiting blocks;
[0008] The refractory brick includes a refractory brick body, the interior of which is provided with a number of silicon carbide fibers, and the exterior of which is provided with a first calcium aluminate coating.
[0009] Preferably, the left side wall of a single refractory brick has two positioning grooves that are symmetrically distributed vertically, and the positioning grooves are adapted to the limiting shaft.
[0010] Preferably, the inner walls of the insertion groove and the limiting shaft, as well as the outer walls of the rectangular limiting block and the limiting shaft, are coated with a second calcium aluminate coating.
[0011] Preferably, zirconium oxide particles are added inside both the rectangular limiting block and the limiting shaft.
[0012] Preferably, the silicon carbide fibers are uniformly distributed within the refractory brick body, with a spacing of three millimeters.
[0013] (III) Beneficial Effects
[0014] Compared with the prior art, this utility model provides a mullite fiber refractory brick with the following characteristics:
[0015] Beneficial effects:
[0016] 1. This mullite fiber refractory brick, by setting rectangular limiting blocks and limiting shafts, allows for easy alignment and positioning of the refractory bricks during splicing and installation. When splicing and installation are required, the two rectangular limiting blocks at the bottom of the upper refractory brick are inserted into the insertion groove at the top of the lower refractory brick, and the limiting shaft on the right side of the left refractory brick is inserted into the positioning groove on the left side of the right refractory brick. This improves the practicality of the structure.
[0017] 2. This mullite fiber refractory brick, by adding a number of silicon carbide fibers inside the refractory brick body, the fibers disperse the external load into the matrix through interfacial bonding, inhibiting crack propagation, thereby improving the impact resistance and flexural strength of the refractory brick and avoiding cracking and spalling. By setting a first calcium aluminate coating and a second calcium aluminate coating, the chemical erosion resistance of the brick body can be improved, further enhancing the practicality of the structure. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a top sectional view of the present invention.
[0020] In the figure: 1. Refractory brick; 11. Refractory brick body; 12. Silicon carbide fiber; 13. First calcium aluminate coating; 2. Rectangular limiting block; 3. Limiting shaft; 4. Insertion groove. Detailed Implementation
[0021] 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.
[0022] Please see Figure 1-2A mullite fiber refractory brick, comprising a refractory brick 1, characterized in that: the number of refractory bricks 1 is two and they are symmetrically distributed vertically, the refractory brick 1 includes a refractory brick body 11, the interior of the refractory brick body 11 is provided with a number of silicon carbide fibers 12, the exterior of the refractory brick body 11 is coated with a first calcium aluminate coating 13, and the silicon carbide fibers 12 are uniformly distributed in the refractory brick body 11 with a spacing of three millimeters.
[0023] Two rectangular limiting blocks 2, symmetrically distributed from left to right, are fixedly connected to the bottom of each of the two refractory bricks 1. Two limiting shafts 3, symmetrically distributed from top to bottom, are fixedly connected to the right side wall of each of the two refractory bricks 1. Zirconia particles are added inside the rectangular limiting blocks 2 and the limiting shafts 3. Two positioning grooves, symmetrically distributed from top to bottom, are opened on the left side wall of each of the two refractory bricks 1. The positioning grooves are adapted to the limiting shafts 3. Two insertion grooves 4, symmetrically distributed from left to right, are opened on the top of each of the two refractory bricks 1. The inner walls of the insertion grooves 4 and the positioning grooves are filled with flexible refractory material. The insertion grooves 4 are adapted to the rectangular limiting blocks 2. The inner walls of the insertion grooves 4 and the limiting shafts 3, as well as the outer walls of the rectangular limiting blocks 2 and the limiting shafts 3, are coated with a second calcium aluminate coating.
[0024] It is worth noting that the standard parts used in this application can all be purchased from the market, and the specific connection methods of each part are all connected by conventional means such as bolts, rivets, and welding that are mature in the prior art. Furthermore, the machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art. The contents not described in detail in the description belong to the prior art known to those skilled in the art, and will not be described in detail here.
[0025] In summary, this mullite fiber refractory brick, by setting rectangular limiting blocks 2 and limiting shafts 3, allows for easy alignment and positioning of the refractory bricks 1 when splicing and installation are required. The two rectangular limiting blocks 2 at the bottom of the upper refractory brick 1 are inserted into the insertion groove at the top of the lower refractory brick 1, and the limiting shaft 3 on the right side of the left refractory brick 1 is inserted into the positioning groove on the left side of the right refractory brick 1. This improves the practicality of the structure. By adding several silicon carbide fibers inside the refractory brick body 11, the fibers disperse the external load into the matrix through interfacial bonding, inhibiting crack propagation and thus improving the impact resistance and flexural strength of the refractory brick, preventing cracking and spalling. The first calcium aluminate coating 13 and the second calcium aluminate coating enhance the brick's resistance to chemical erosion, further improving the practicality of the structure. This solves some of the defects of existing mullite fiber refractory bricks, such as low mechanical strength, susceptibility to cracking and spalling, and inconvenience during splicing and alignment.
[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A mullite fiber refractory brick, comprising a refractory brick (1), characterized in that: The number of refractory bricks (1) is two and they are symmetrically distributed vertically. The bottom of each of the two refractory bricks (1) is provided with two rectangular limiting blocks (2) that are symmetrically distributed horizontally. The right side wall of each of the two refractory bricks (1) is provided with two limiting shafts (3) that are symmetrically distributed vertically. The top of each of the two refractory bricks (1) is provided with two insertion slots (4) that are symmetrically distributed horizontally. The insertion slots (4) are adapted to the rectangular limiting blocks (2). The refractory brick (1) includes a refractory brick body (11), the interior of which is provided with a number of silicon carbide fibers (12), and the exterior of which is provided with a first calcium aluminate coating (13).
2. The mullite fiber refractory brick according to claim 1, characterized in that: Two positioning grooves are provided on the left side wall of a single refractory brick (1) and are symmetrically distributed vertically. The positioning grooves are adapted to the limiting shaft (3).
3. The mullite fiber refractory brick according to claim 1, characterized in that: The inner walls of the insertion groove (4) and the limiting shaft (3), as well as the outer walls of the rectangular limiting block (2) and the limiting shaft (3), are all coated with a second calcium aluminate coating.
4. The mullite fiber refractory brick according to claim 1, characterized in that: Zirconia particles are added inside both the rectangular limiting block (2) and the limiting shaft (3).
5. The mullite fiber refractory brick according to claim 1, characterized in that: The silicon carbide fibers (12) are uniformly distributed within the refractory brick body (11) with a spacing of three millimeters.