Casting aluminum oxide hook brick
By setting a coarse-grained section and optimizing the grain distribution on the brick support surface of the fused alumina hook brick, the problem of insufficient thermal shock resistance of existing hook bricks is solved, and the mechanical properties and kiln structure stability are improved.
Patent Information
- Application Number
- CN202520507960.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-21
AI Technical Summary
The thermal shock resistance of existing cast alumina hook bricks is insufficient, and the product quality needs further improvement.
Design a cast alumina hook brick, including setting a coarse-grained part on the brick support surface and a fine-grained part on other refractory surfaces, thereby optimizing the grain distribution to improve mechanical properties and stress distribution.
It improves the thermal shock resistance and mechanical properties of hook bricks, reduces the risk of damage caused by thermal shock, and enhances the stability of the kiln structure.
Smart Images
Figure CN223869814U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hook brick technical field, concretely relates to a fused cast alumina hook brick. BACKGROUND
[0002] In recent years, with the continuous development of glass kiln, especially the continuous development of special glass kiln, the upper structure of pure oxygen kiln or pure oxygen plus electric melting brick kiln tends to use more and more fused cast products. For the upper structure of glass kiln, hook brick (for example, fused cast alumina hook brick) is an indispensable component, so the demand for fused cast alumina hook brick is also increasing.
[0003] Due to the specific application environment of the fused cast alumina hook brick, it needs to have good thermal shock resistance. However, the fused cast alumina hook brick in the prior art still has room for further improvement in this regard. SUMMARY
[0004] In order to overcome the above technical problems, the purpose of the utility model is to provide a fused cast alumina hook brick to solve the problem of insufficient thermal shock resistance of the existing fused cast alumina hook brick and the need for further improvement of product quality.
[0005] The purpose of the utility model can be achieved through the following technical solutions:
[0006] A fused cast alumina hook brick, comprising a hook brick main body extending in a predetermined extension direction, the hook brick main body comprising a brick body support surface and a brick body first refractory surface oppositely arranged and located on both sides of the extension direction thereof, and a circumferential surface located between the brick body support surface and the brick body first refractory surface, further comprising a protruding portion formed by integral extension from one end of the hook brick main body, the integral extension direction being biased toward one side of the brick body support surface; the protruding portion comprises a brick body second refractory surface and a brick body third refractory surface oppositely arranged and located on both sides of the extension direction thereof, and a circumferential surface located between the second refractory surface and the brick body third refractory surface, the brick body support surface and the brick body second refractory surface being adjacent, and the brick body first refractory surface and the brick body third refractory surface being adjacent;
[0007] According to the extension direction of the protruding portion, the distal end of the protruding portion comprises a brick body fourth refractory surface, the brick body fourth refractory surface being adjacent to the brick body second refractory surface and the brick body third refractory surface respectively;
[0008] The brick body support surface comprises a coarse grain portion.
[0009] In one aspect of the utility model: the brick body second refractory surface and / or the brick body fourth refractory surface comprises a coarse grain portion;
[0010] The first refractory surface and / or the third refractory surface of the brick do not include the coarse-grained portion;
[0011] The fourth refractory surface of the brick is adjacent to the second refractory surface and the third refractory surface of the brick, respectively.
[0012] In one embodiment of this utility model: the angle between the brick support surface and the second refractory surface of the brick is 80-120°, the angle between the brick support surface and the first refractory surface of the brick is no greater than 10°, and the angle between the second refractory surface of the brick and the third refractory surface of the brick is no greater than 10°.
[0013] In one embodiment of this utility model: the hook brick body is a columnar structure, and the hook brick body extends in a straight line;
[0014] The protrusion has a cylindrical structure and extends in a straight line;
[0015] The angle between the extending direction of the hook brick body and the extending direction of the protrusion is 80-120°.
[0016] In one embodiment of this utility model: the angle between the extending direction of the protrusion and the brick support surface is 80-120°;
[0017] The angle between the extension direction of the hook brick body and the second refractory surface of the brick body is 80-120°;
[0018] The angle between the fourth refractory surface of the brick and the supporting surface of the brick is no greater than 30°.
[0019] In one embodiment of this utility model: the middle part of the brick support surface includes a coarse-grained part.
[0020] In one aspect of this utility model: based on the total area of the brick support surface, the area ratio of the coarse-grained portion on the brick support surface is 2% to 50%.
[0021] In one embodiment of this utility model: the total area of the coarse-grained portion on the brick support surface is not less than 100 cm². 2 .
[0022] In one embodiment of this utility model, a fire-resistant rounded corner is further provided between the brick support surface and the second fire-resistant surface of the brick.
[0023] In one embodiment of this utility model: a refractory chamfered surface is further provided between the first refractory surface and the third refractory surface of the brick.
[0024] The beneficial effects of this invention are as follows: The cast alumina hook brick provided by this invention has a coarse-grained portion on its brick support surface, which optimizes its contact quality with the kiln's metal components. This design not only helps to delay and prevent the propagation of potential cracks but also improves the overall stability of the kiln structure. Specifically, the introduction of the coarse-grained portion improves the mechanical properties of the hook brick under high-temperature conditions, resulting in a more uniform stress distribution and effectively reducing the risk of damage caused by thermal shock.
[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0026] The present invention will be further described below with reference to the accompanying drawings.
[0027] Figure 1 This is a first-person perspective three-dimensional structural diagram of the present invention;
[0028] Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of this utility model.
[0029] In the diagram: 1. Hook brick body; 11. Brick support surface; 12. First refractory surface of brick; 2. Protrusion; 21. Second refractory surface of brick; 22. Third refractory surface of brick; 23. Fourth refractory surface of brick; 3. Coarse grain part; 4. Refractory chamfered surface; 5. Refractory rounded corner. Detailed Implementation
[0030] 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 skilled in the art without creative effort are within the protection scope of the present utility model.
[0031] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0032] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0033] Please see Figures 1-2 This utility model provides a fused alumina hook brick (e.g., an electrofused alumina hook brick), comprising a hook brick body 1 extending along a predetermined extension direction and a protrusion 2 integrally extended from one end of the hook brick body 1. It is understood that the hook brick body 1 does not necessarily extend in a straight line; it can also extend along a curve or be bent at a specific location. The hook brick body 1 includes a brick support surface 11 and a first refractory surface 12 facing each other and located on both sides of its extension direction, and a circumferential surface located between them; the integrally extended direction is biased towards one side of the brick support surface 11. The protrusion 2 includes a second refractory surface 21 and a third refractory surface 22 facing each other and located on both sides of its extension direction, and a circumferential surface located between them; it is understood that the protrusion 2 does not necessarily extend in a straight line; it can also extend along a curve or be bent at a specific location. The brick support surface 11 and the second refractory surface 21 are adjacent, and there may be a certain distance between them or they may be directly adjacent; the first refractory surface 12 and the third refractory surface 22 are adjacent, and there may be a certain distance between them or they may be directly adjacent; along the extension direction of the protrusion 2, the distal end of the protrusion 2 includes the fourth refractory surface 23, which is adjacent to the second refractory surface 21 and the third refractory surface 22 respectively. There may be a certain distance between the fourth refractory surface 23 and the second refractory surface 21, and between the fourth refractory surface 23 and the third refractory surface 22, or they may be directly adjacent; the brick support surface 11 includes a coarse-grained portion 3. In this application, the coarse-grained portion 3 refers to a brick surface area that includes multiple β-corundum crystal particles with a length of not less than 0.5 cm. As long as β-corundum crystal particles satisfying the above size range can be observed on the brick surface, the location of these β-corundum crystal particles is considered to be the coarse-grained portion 3. Normally, these β-corundum crystal particles can be directly observed with the naked eye, and the coarse-grained portion 3 is usually integrated with the rest of the brick body of the cast alumina hook brick. In this application, the definition of β-corundum crystal particles refers to the relevant content in the national standard JC / T 494-2013.
[0034] It should be noted that in glass furnaces including fused alumina hook bricks, the brick support surface 11 typically needs to contact the metal components of the furnace, and includes a coarse-grained portion 3, which helps to delay and prevent the propagation of cracks that may occur on the fused alumina hook brick. This helps to improve the thermal shock resistance of the fused alumina hook brick to resist thermal stress generated by thermal gradients during use. In one embodiment of this application, based on the inclusion of the coarse-grained portion 3 in the brick support surface 11, the second refractory surface 21 and / or the fourth refractory surface 23 of the brick may also include the coarse-grained portion 3. In another embodiment of this application, the fourth refractory surface 23 of the brick is adjacent to the second refractory surface 21 and the third refractory surface 22 of the brick, respectively.
[0035] The fused cast alumina hook brick of this application can be integrally cast by casting in a mold and then removing excess material. Specifically, in the processing of the fused cast alumina hook brick, the material needs to be melted at a temperature higher than that of the material to form a liquid material, which is then introduced into a casting mold of a suitable shape and subsequently cooled and solidified to form a preform. By utilizing the shape characteristics of the fused cast alumina hook brick itself and the distribution of shrinkage cavities in the casting mold (the brick support surface 11 and the second refractory surface 21 of the fused cast alumina hook brick face the shrinkage cavity portion in the casting mold), it can be ensured that the preform retains the dense area to the maximum extent after removing excess material, and a coarse grain portion 3 is formed at a suitable position in the processed fused cast alumina hook brick. During the casting process, the distribution of shrinkage cavities in the casting mold generally decreases from the center to both ends, with the central area showing a deeper shrinkage cavity and the cavities at both ends being shallower. This distribution avoids the forming position of the fused alumina hook brick in the casting mold, so that all shrinkage cavities can be removed in subsequent processing. Since the position relatively close to the shrinkage cavity in the casting mold has a large grain size, after the shrinkage cavity is removed and the excess material of appropriate size is removed, while retaining the integrally cast target brick part, the surface of the brick support surface 11 will have a coarse grain part 3, which helps to delay and prevent the propagation of possible cracks and improve the thermal shock resistance of the hook brick.
[0036] The first refractory surface 12 and the third refractory surface 22 of the brick body are usually formed from the parts that are close to or directly in contact with the casting mold. The resulting brick body surface has a relatively finer grain size surface, and its surface does not include the coarse grain part 3 (for example, there are generally no β corundum crystal particles with a crystal particle length of not less than 0.5 cm, that is, the number of β corundum crystal particles with a crystal particle length of not less than 0.5 cm observed on the brick body surface is not more than 1). This helps to improve the erosion resistance of the fused alumina hook brick to meet the needs of the fused alumina hook brick used in glass furnaces, thereby ensuring the durability and performance of the casting.
[0037] Please see Figures 1-2 The specific shape and size of the hook brick can usually be adjusted according to the design requirements of the kiln. For example, the angle between the brick support surface 11 and the first refractory surface 12 of the brick can be no greater than 10°. Preferably, the brick support surface 11 can be substantially parallel to the first refractory surface 12 of the brick. As another example, the hook brick body 1 can be cylindrical, preferably cuboid.
[0038] For example, the length of the hook brick body 1 can be 300-1000 mm, the width can be 100-700 mm, and the height can be 100-500 mm. In this application, the length of the hook brick body 1 is the overall extension direction of the hook brick body 1; the width is the direction perpendicular to its length and parallel to the plane on which the brick support surface 11 is located; and the height is determined based on its length and width.
[0039] For example, the angle between the second refractory surface 21 and the third refractory surface 22 of the brick can be no greater than 10°. Preferably, the second refractory surface 21 of the brick can be substantially parallel to the third refractory surface 22 of the brick. For example, the protrusion 2 can be cylindrical, preferably cuboid.
[0040] For example, the length of the protrusion 2 can be 100-500 mm, the width of the protrusion 2 can be 100-700 mm, and the height of the protrusion 2 can be 100-500 mm. In this application, the length direction of the protrusion 2 is the overall extension direction of the protrusion 2; the width direction of the protrusion 2 is the direction perpendicular to its length direction and parallel to the plane on which the second refractory surface 21 of the brick is located; the height direction of the protrusion 2 is determined according to its length and width directions.
[0041] For example, the angle between the extension direction of the hook brick body 1 and the extension direction of the protrusion 2 can be 80 to 120°, for example, it can be 90°.
[0042] For example, the angle between the brick support surface 11 and the second refractory surface 21 of the brick can be 80 to 120°, the angle between the extension direction of the protrusion 2 and the brick support surface 11 can be 80 to 120°, the angle between the extension direction of the hook brick body 1 and the second refractory surface (21) of the brick can be 80 to 120°, and the angle between the fourth refractory surface 23 of the brick and the brick support surface 11 can be no greater than 30°. For example, the fourth refractory surface 23 of the brick can be basically parallel to the brick support surface 11.
[0043] Please seeFigure 1 The cast alumina hook brick includes a brick support surface 11, and the coarse-grained portion 3 can be located in the middle of the brick support surface 11. It should be noted that when the coarse-grained portion 3 is formed in the middle region of the brick support surface 11, the cast alumina hook brick can have better thermal shock resistance when it experiences rapid temperature changes during use, which is beneficial for resisting thermal stress caused by thermal gradients during use.
[0044] Please see Figures 1-2 The coarse-grained portion 3 can account for 2% to 50% of the total area of the brick support surface 11, and the total area of the coarse-grained portion 3 can be no less than 100 cm². 2 .
[0045] Please see Figure 1 A refractory rounded corner 5 can also be provided between the brick support surface 11 and the second refractory surface 21 of the brick. By providing the refractory rounded corner 5, a smooth transition can be achieved between the brick support surface 11 and the second refractory surface 21 of the brick, reducing sharp edges and helping to maintain the stability of the flame inside the kiln.
[0046] Please see Figure 1 A refractory chamfered surface 4 can also be provided between the first refractory surface 12 and the third refractory surface 22 of the brick. By providing the refractory chamfered surface 4, a smooth transition can be formed between the first refractory surface 12 and the third refractory surface 22 of the brick, thereby reducing the risk of breakage when subjected to greater pressure.
[0047] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.
Claims
1. A cast alumina hook brick, characterized in that, The system includes a hook brick body (1) extending along a predetermined extension direction. The hook brick body (1) includes a brick support surface (11) and a first refractory brick surface (12) located opposite each other and on both sides of its extension direction, and a circumferential surface located between the brick support surface (11) and the first refractory brick surface (12). The system also includes a protrusion (2) integrally extended from one end of the hook brick body (1). The direction of the integral extension is biased towards one side of the brick support surface (11). The protrusion (2) includes a second refractory brick surface (21) and a third refractory brick surface (22) located opposite each other and on both sides of its extension direction, and a circumferential surface located between the second refractory brick surface (21) and the third refractory brick surface (22). The brick support surface (11) and the second refractory brick surface (21) are adjacent to each other, and the first refractory brick surface (12) and the third refractory brick surface (22) are adjacent to each other. According to the extending direction of the protrusion (2), the distal end of the protrusion (2) includes the fourth refractory surface (23) of the brick body, which is adjacent to the second refractory surface (21) and the third refractory surface (22) of the brick body respectively. The brick support surface (11) includes a coarse-grained portion (3).
2. The cast alumina hook brick according to claim 1, characterized in that, The second refractory surface (21) and / or the fourth refractory surface (23) of the brick body include a coarse-grained portion (3); The first refractory surface (12) and / or the third refractory surface (22) of the brick body do not include the coarse grain portion (3); The fourth refractory surface (23) of the brick is adjacent to the second refractory surface (21) and the third refractory surface (22) of the brick.
3. The cast alumina hook brick according to claim 1, characterized in that, The angle between the brick support surface (11) and the second refractory surface (21) of the brick is 80-120°, the angle between the brick support surface (11) and the first refractory surface (12) of the brick is no greater than 10°, and the angle between the second refractory surface (21) and the third refractory surface (22) of the brick is no greater than 10°.
4. The cast alumina hook brick according to claim 1, characterized in that, The hook brick body (1) is a columnar structure, and the hook brick body (1) extends in a straight line; The protrusion (2) is a cylindrical structure and extends in a straight line; The angle between the extension direction of the hook brick body (1) and the extension direction of the protrusion (2) is 80-120°.
5. The cast alumina hook brick according to claim 1, characterized in that, The angle between the extending direction of the protrusion (2) and the brick support surface (11) is 80-120°; The angle between the extension direction of the hook brick body (1) and the second refractory surface (21) of the brick body is 80-120°; The angle between the fourth refractory surface (23) of the brick and the supporting surface (11) of the brick is no greater than 30°.
6. A cast alumina hook brick according to any one of claims 1-5, characterized in that, The middle part of the brick support surface (11) includes a coarse-grained part (3).
7. The cast alumina hook brick according to claim 6, characterized in that, Based on the total area of the brick support surface (11), the area ratio of the coarse grain portion (3) on the brick support surface (11) is 2% to 50%.
8. The cast alumina hook brick according to claim 7, characterized in that, The total area of the coarse-grained portion (3) on the brick support surface (11) is not less than 100 cm². 2 .
9. A cast alumina hook brick according to any one of claims 1-5, characterized in that, A fire-resistant rounded corner (5) is also provided between the brick support surface (11) and the second fire-resistant surface (21) of the brick.
10. A cast alumina hook brick according to any one of claims 1-5, characterized in that, A fire-resistant chamfered surface (4) is also provided between the first fire-resistant surface (12) and the third fire-resistant surface (22) of the brick body.