Novel white corundum block kiln car heat preservation system
Patent Information
- Application Number
- CN202521380925.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-02
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-07-02
AI Technical Summary
[0003]接包车内白刚玉熔液四周逐渐冷却形成固体，为了白刚玉生产冶炼24小时连续进行，白刚玉熔块在接包车内保温一定时间后，需要及时把白刚玉熔块移出接包车，移出接包的熔块温度超过1400℃，如果将熔块直接放置在室温空气环境冷却，散热较快，熔块整体析晶较差，达不到磨具磨料行业使用要求
[0013] This utility model relates to a white fused alumina frit kiln car insulation system, comprising a tunnel kiln and a kiln car equipped with a layer of square fused alumina bricks, a layer of fused alumina castable, a layer of hollow spherical castable, and a high-alumina fiber blanket. During operation, white fused alumina frit removed from the ladle car is placed on the kiln car, and the kiln car transfers the white fused alumina frit into the tunnel kiln for insulation for a certain period of time. This delays the heat loss of the white fused alumina frit, prolongs the cooling and crystallization process of the white fused alumina frit, increases the bulk density of the frit, reduces the impurity content of the white fused alumina, increases the alumina content, and improves the performance of white fused alumina in refractory products.
Smart Images
Figure CN224650260U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of refractory materials technology, specifically relating to a novel white fused alumina frit kiln car insulation system. Background Technology
[0002] The production process of white fused alumina uses industrial alumina powder as raw material, which is smelted in an electric arc furnace at a high temperature of over 2000 degrees Celsius. The molten liquid is then transferred to a ladle car for cooling to form white fused alumina frit. After crushing and shaping, magnetic separation to remove iron, and sieving into various particle sizes, it has a dense texture and high hardness. High-power smelting and extended refining time are usually used to fully remove impurities from the white fused alumina, improving the purity of the product. In addition to the smelting process, the cooling and crystallization process of the white fused alumina molten liquid plays a crucial role in producing high-quality white fused alumina. Numerous experimental studies have shown that the larger the volume of the white fused alumina frit and the longer the crystallization time, the larger and more compact the resulting white fused alumina crystals, the better the luster, the lower the content of impurities such as silicon, iron, titanium, and sodium, and the higher the alumina content, the better its hardness and grinding performance.
[0003] As the molten white fused alumina in the ladle gradually cools and solidifies, in order to ensure that the production and smelting of white fused alumina can continue for 24 hours, the white fused alumina molten block needs to be removed from the ladle in a timely manner after being kept at a certain temperature in the ladle for a certain period of time. The temperature of the molten block removed from the ladle exceeds 1400℃. If the molten block is placed directly in the room temperature air environment to cool, the heat dissipation is too fast, and the overall crystallization of the molten block is poor, which does not meet the requirements for use in the abrasive industry. Summary of the Invention
[0004] To address the problems in the background art, this utility model discloses a novel white fused alumina frit kiln car insulation system, comprising a tunnel kiln and a layer of fused alumina bricks, a layer of fused alumina castable, a layer of hollow spherical castable, and a high-alumina fiber blanket set on the top of the kiln car, which prolongs the cooling and crystallization process of the white fused alumina frit, increases the bulk density of the frit, and reduces the impurity content of the white fused alumina.
[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:
[0006] A novel white corundum frit kiln car insulation system includes a closed tunnel kiln capable of accommodating the kiln car. The tunnel kiln has access doors for the kiln car to enter and exit. A high-alumina fiber blanket is laid flat on the top plate of the kiln car. A hollow spherical castable layer is positioned above the high-alumina fiber blanket. A recessed groove is provided in the center of the hollow spherical castable layer, and a corundum brick layer is fitted into the groove. The upper surface of the corundum brick layer is higher than the upper surface of the hollow spherical castable layer. Corundum castable layers are positioned around the corundum brick layer, and the upper surfaces of the corundum castable layers are flush with the upper surfaces of the corundum brick layers.
[0007] Furthermore, in the novel white fused alumina frit kiln car insulation system, the thickness of the fused alumina brick layer is 200-260 mm, and the area of the upper surface of the fused alumina brick layer is larger than the bottom area of the white fused alumina frit.
[0008] Furthermore, the novel white fused alumina frit kiln car insulation system has high-alumina fiber modules evenly distributed on the top edge of the kiln car and the inner wall of the tunnel kiln.
[0009] Furthermore, the novel white fused alumina frit kiln car insulation system has a mesh support made of welded round steel poured on the upper surface of the fused alumina castable layer.
[0010] Furthermore, the novel white fused alumina frit kiln car insulation system has several Y-shaped anchors cast between the fused alumina castable layer and the hollow sphere castable layer.
[0011] Furthermore, the novel white fused alumina frit kiln car insulation system further includes a bottom plate spaced below the top plate, with several I-beams spaced between the top and bottom plates. The density of the I-beams gradually decreases from the middle to both sides. Several wheels are spaced below the bottom plate of the kiln car. Under the action of the drive mechanism, the kiln car can pass through the tunnel kiln.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] This utility model relates to a white fused alumina frit kiln car insulation system, comprising a tunnel kiln and a kiln car equipped with a layer of square fused alumina bricks, a layer of fused alumina castable, a layer of hollow spherical castable, and a high-alumina fiber blanket. During operation, white fused alumina frit removed from the ladle car is placed on the kiln car, and the kiln car transfers the white fused alumina frit into the tunnel kiln for insulation for a certain period of time. This delays the heat loss of the white fused alumina frit, prolongs the cooling and crystallization process of the white fused alumina frit, increases the bulk density of the frit, reduces the impurity content of the white fused alumina, increases the alumina content, and improves the performance of white fused alumina in refractory products. Attached Figure Description
[0014] Figure 1 This is a cross-sectional structural schematic diagram of the white fused alumina frit kiln car insulation system of this utility model;
[0015] In the diagram above: 1-White corundum frit; 2-Corundum brick layer; 3-Corundum castable layer; 4-Y-type anchor; 5-Hollow sphere castable layer; 6-High alumina fiber blanket; 7-Kiln car; 8-Walking wheel; 9-Tunnel kiln; 10-First round steel; 11-Second round steel; 12-First high alumina fiber module; 13-Second high alumina fiber module; 14-I-beam. Detailed Implementation
[0016] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.
[0017] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0018] In this invention, unless otherwise explicitly 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 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 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.
[0019] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0020] Combined with appendix Figure 1This invention details a novel white corundum frit kiln car insulation system, comprising a closed tunnel kiln 9 capable of accommodating kiln cars 7. It should be noted that the tunnel kiln 9 can accommodate at least one kiln car 7. In actual production, the specifications of the tunnel kiln 9 can be expanded as needed to accommodate multiple kiln cars 7. A passageway for the kiln cars 7 to enter and exit the tunnel kiln 9 is provided. A high-alumina fiber blanket 6 is laid flat on the top plate of the kiln car 7, and a hollow spherical castable layer 5 is provided above the high-alumina fiber blanket 6. The hollow spherical castable layer 5 and the high-alumina fiber blanket 6 provide heat insulation protection for the kiln car 7. A recessed section is provided in the middle of the hollow spherical castable layer 5. A groove is formed within which a corundum brick layer 2 is fitted. The upper surface of the corundum brick layer 2 is higher than the upper surface of the hollow spherical castable layer 5. Corundum castable layers 3 are respectively arranged around the corundum brick layer 2. The aggregate of the corundum castable layers consists of white corundum particles with particle sizes of 8-5 mm, 5-3 mm, 3-1 mm and / or 1-0 mm, as well as 200 mesh and 325 mesh white corundum fine powder, to prevent the white corundum frit from being contaminated by impurities. The corundum castable layer 3 is in contact with the corundum brick layer 2, and the upper surface of the corundum castable layer 3 is flush with the upper surface of the corundum brick layer 2. The white corundum frit 1 is placed on the corundum brick layer 2. The high-strength heat insulation performance of the corundum brick provides a certain degree of protection for the kiln car.
[0021] As an optional design, the novel white fused alumina frit kiln car insulation system is preferred. The thickness of the fused alumina brick layer 2 is 200-260 mm. The high temperature resistance of the fused alumina brick provides a certain degree of protection for the kiln car. The area of the upper surface of the fused alumina brick layer 2 is larger than the bottom area of the white fused alumina frit 1. The white fused alumina frit 1 is placed on the fused alumina brick layer 2. The bottom of the white fused alumina frit 1, which is larger at the top and smaller at the bottom, is supported by frit.
[0022] As an optional design, the novel white corundum frit kiln car insulation system is preferred, in which a second high-alumina fiber module 13 is evenly distributed on the top edge of the kiln car 7, and a first high-alumina fiber module 12 is evenly distributed on the inner wall of the tunnel kiln 9. The first high-alumina fiber module 12 improves the heat insulation protection of the tunnel kiln 9, and the second high-alumina fiber module 13 provides heat insulation protection for the steel plate of the kiln car side wall.
[0023] As an optional design, the novel white fused alumina frit kiln car insulation system is preferred, in which a mesh support is cast on the upper surface of the corundum castable layer 3, which is formed by interlacing and welding several φ50mm first round steel 10 and φ30mm second round steel 11, to prevent the white fused alumina frit 1 from cracking and damaging the corundum castable layer 3 after cooling, and to extend the service life of the corundum castable.
[0024] As an optional design, the novel white fused alumina frit kiln car insulation system preferably includes several Y-shaped anchors 4 cast between the fused alumina castable layer 3 and the hollow sphere castable layer 5 to improve the overall strength of the fused alumina castable layer 3 and the hollow sphere castable layer 5.
[0025] As an optional design, the novel white corundum frit kiln car insulation system is preferred. The kiln car 7 also includes a bottom plate spaced below the top plate. Side wall steel plates are provided between the edges of the bottom plate, top plate, high alumina fiber blanket 6, hollow sphere castable layer 5, corundum castable layer 3, and second high alumina fiber module 13 of the kiln car 7. Several I-beams 14 and channel steels are spaced between the top plate and the bottom plate. The density of the I-beams 14 and channel steels gradually decreases from the middle to both sides to improve the load-bearing capacity and overall strength of the kiln car 7 and prevent the kiln car from deforming under high temperature conditions. Several traveling wheels 8 are spaced below the bottom plate of the kiln car 7. Under the action of the drive mechanism, the kiln car 7 can pass through the tunnel kiln 9. It should be noted that the drive mechanism adopts existing technology and can move the kiln car 7 by pulling the kiln car 7 with a traction device or by driving the traveling wheels 8 with a motor to rotate the kiln car 7.
[0026] The working process of this utility model is as follows:
[0027] During operation, the white fused alumina molten block 1 removed from the receiving car is placed on the kiln car 7, and the kiln car 7 is transferred into the tunnel kiln 9 and kept at a certain temperature for a certain period of time. This delays the heat loss of the white fused alumina molten block 1, prolongs the cooling and crystallization process of the white fused alumina molten block 1, avoids the enrichment of impurities and poor crystal development caused by rapid cooling, better removes impurities that were not removed during the smelting process, increases the bulk density of the white fused alumina molten block 1, reduces the impurity content in the white fused alumina molten block, increases the alumina content, and improves the performance of white fused alumina in refractory products.
[0028] The above description is only an application implementation of this utility model, but the protection scope of this utility model is not limited thereto and cannot be used to limit the scope of rights of this utility model. Any equivalent changes made according to the technical solution of this utility model should be included within the protection scope of this utility model.
Claims
1. A novel heat preservation system for white fused alumina frit kiln cars, characterized in that: The system includes a closed tunnel kiln capable of accommodating kiln cars. The tunnel kiln has access doors for the kiln cars to enter and exit. A high-alumina fiber blanket is laid flat on the top plate of the kiln car. A hollow spherical castable layer is positioned above the high-alumina fiber blanket. A recessed groove is located in the center of the hollow spherical castable layer, and a corundum brick layer is fitted into the groove. The upper surface of the corundum brick layer is higher than the upper surface of the hollow spherical castable layer. Corundum castable layers are positioned around the corundum brick layer, and these corundum castable layers are in contact with the corundum brick layer, with their upper surfaces flush with the upper surfaces of the corundum brick layer.
2. The novel white fused alumina frit kiln car insulation system according to claim 1, characterized in that: The thickness of the corundum brick layer is 200-260 mm, and the area of the upper surface of the corundum brick layer is larger than the bottom area of the white corundum molten block.
3. The novel white fused alumina frit kiln car insulation system according to claim 1 or 2, characterized in that: High-alumina fiber modules are evenly distributed on the top edge of the kiln car and the inner wall of the tunnel kiln.
4. The novel white fused alumina frit kiln car insulation system according to claim 3, characterized in that: A mesh support made of welded round steel is cast on the upper surface of the corundum castable layer.
5. The novel white fused alumina frit kiln car insulation system according to claim 3, characterized in that: Several Y-shaped anchors are cast between the corundum castable layer and the hollow sphere castable layer.
6. The novel white fused alumina frit kiln car insulation system according to claim 3, characterized in that: The kiln car also includes a bottom plate spaced below the top plate. Several I-beams are spaced between the top plate and the bottom plate, with the density of the I-beams gradually decreasing from the middle to the sides. Several wheels are spaced below the bottom plate of the kiln car. Under the action of the drive mechanism, the kiln car can pass through the tunnel kiln.