High-temperature-resistant and wear-resistant silicon carbide refractory material and metal blind pipe composite structure
By adopting silicon carbide refractory material and metal blind tube composite structure in the nonferrous smelting industry, combining cold air heat exchange and refractory bricks, the problems of bending, wear and connection failure of traditional blind tubes at high temperatures are solved, and high wear resistance is achieved. High thermal conductivity, extends service life and reduces maintenance requirements.
Patent Information
- Application Number
- CN202420991938.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-05-09
AI Technical Summary
In the nonferrous smelting industry, traditional metal blind pipes are prone to bend, deform, melt and wear at high temperatures, and the refractory interface cannot effectively reduce cooling and wear resistance, resulting in a shortened service life of the pipe, easy failure of the outer wall bolts, and the pipe wall and the refractory layer are not tight. Cooperation will cause fire to peel off.
Silicon carbide refractory material and metal blind tube composite structure, combined with cold air heat exchange tube, silicon carbide refractory bricks and self-flow castable, air welding through V-shaped anchors and tiles, sealed with refractory fiber felt to form high thermal conductivity, High wear-resistant composite structure, exhausts hot gases and extends service life.
It achieves high wear resistance and high thermal conductivity of pipelines under high temperature conditions, extends service life, avoids connection failure and refractory material fall off, reduces maintenance and repair needs, and has significant economic benefits.
Smart Images
Figure CN222164026U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of blind pipe transportation that needs to be resistant to high temperature and wear in nonferrous smelting industry, and specifically relates to a composite structure of high temperature and wear resistant silicon carbide refractory material and metal blind pipe. Background Art
[0002] In the nonferrous smelting industry, it is often necessary to have pipelines entering the combustion operation space to introduce combustion gases or combustion-supporting gases to help production operations more fully. However, under high temperatures, metals will bend and deform after exceeding 800°C, and may even melt after long-term service. At the same time, the outer wall of the pipeline is constantly eroded by hot particles at high temperatures, causing severe wear and tear, which greatly shortens the service life. Traditional refractory interfaces cannot achieve both cooling and wear resistance. While being highly wear-resistant, the temperature cannot be conducted away, causing the pipeline to fail due to long-term high-temperature operation. At the same time, traditional pipeline outer wall bolts use countersunk hole design, which requires bare bolts to contact the heat source, which is prone to connection failure. Moreover, the pipe wall and the refractory layer cannot fit tightly, forming an assembly gap, which is prone to fire and spalling damage. Summary of the invention
[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a high temperature and wear resistant silicon carbide refractory material and metal blind pipe composite structure.
[0004] The technical solutions adopted by the utility model to achieve the above-mentioned purpose are as follows:
[0005] A high temperature and wear resistant composite structure of silicon carbide refractory material and metal blind pipe, wherein the metal blind pipe has a spherical head at the lower end, a cold air heat exchange pipe is fixed in the metal blind pipe; a gap is provided between the lower end interface of the cold air heat exchange pipe and the spherical head for effectively discharging hot gas; silicon carbide refractory bricks are suspended in an annular manner on the outer wall surface of the metal blind pipe; silicon carbide self-flowing castable is filled between the silicon carbide refractory bricks and the outer wall surface of the blind pipe; the silicon carbide refractory bricks, the silicon carbide self-flowing castable and the metal blind pipe together constitute a high temperature and wear resistant composite structure.
[0006] The metal blind pipe is connected with a stud, and the silicon carbide refractory brick is hung on the stud of the metal blind pipe through the T-slot thereon.
[0007] The surface of the spherical head is evenly distributed with a plurality of V-shaped anchors; the spherical head is suspended and welded to the lower end of the metal blind pipe through a brick support plate; the brick support plates are six in a circumferential distribution, and there is an expansion gap between two adjacent brick support plates.
[0008] A refractory fiber felt is arranged in the gap between two adjacent silicon carbide product bricks to seal the gap between the two refractory bricks.
[0009] The utility model proposes a high temperature and wear resistant silicon carbide refractory material and metal blind pipe composite structure, which can wrap the outer wall of the pipeline to provide high wear resistance and high thermal conductivity; the heat conducted out is then transferred out through the cold air heat exchange device, thereby extending the service life; at the same time, the traditional pipeline outer wall bolt adopts a countersunk hole design, which requires the bare bolt to contact the heat source, which is prone to connection failure. Moreover, the pipe wall and the refractory layer cannot fit tightly, forming an assembly gap, which is prone to fire and peeling damage, effectively solving the problem that metal pipes cannot be used under high temperature and strong friction conditions, and extending the use of the outer refractory material of the metal pipeline. The problem of easy shedding, less maintenance, convenient and quick assembly and maintenance, has significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 Installation structure layout diagram for blind pipe;
[0011] Figure 2 yes Figure 1 A magnified view of the middle I position;
[0012] Figure 3 yes Figure 1 Enlarged view of the middle II position;
[0013] Figure 4 This is a hierarchical layout diagram for the assembly.
[0014] In the figure: 1-cold air heat exchange tube; 2-metal blind pipe; 3-silicon carbide self-flowing castable; 4-silicon carbide refractory brick; 5-corundum castable; 6-T-slot; 7-double-headed stud; 8-nut; 9-reserved threaded hole; 10-refractory fiber felt; 11-brick support plate; 12-V-type anchor. DETAILED DESCRIPTION
[0015] The utility model is described in detail with reference to the accompanying drawings and specific embodiments:
[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a high temperature and wear resistant composite structure of silicon carbide refractory material and metal blind pipe is provided, wherein the metal blind pipe 2 is a structure having a spherical head at the lower end, and a cold air heat exchange pipe 1 is fixed in the metal blind pipe 2; a gap is provided between the lower end interface of the cold air heat exchange pipe 1 and the spherical head for effectively discharging hot gas; silicon carbide refractory bricks 7 are suspended in an annular manner on the outer wall surface of the metal blind pipe 4; silicon carbide self-flowing castable 3 is filled between the silicon carbide refractory bricks 7 and the outer wall surface of the metal blind pipe 2; the silicon carbide refractory bricks, the silicon carbide self-flowing castable and the metal blind pipe together constitute a high temperature and wear resistant composite structure.
[0017] The blind tube 2 has reserved threaded holes 9 for connecting studs 7. The threaded holes 9 are evenly distributed on the circumference of the outer wall. The assembly feed depth of the nut 8 can be adjusted according to the embedding depth of the T-slot 6 of the silicon carbide refractory brick.
[0018] The surface of the spherical head at the lower end of the blind pipe 1 is welded with a V-shaped anchor 12, and appropriate V-shaped anchors 12 are selected according to the thickness of the material layer to be cast and are evenly distributed on the surface of the spherical head. Then, the outer contour of the spherical head is molded and the corundum castable material 5 is poured and formed. After it has a certain strength, it is transported and baked. After the strength reaches the required level, the upper 310s stainless steel support brick plate 11 is welded. The support brick plate 11 is not a whole piece, but is divided into six pieces in the circumferential direction, and then fixed by suspended welding to reserve an expansion gap; after the studs 7 and nuts 8 are installed, the silicon carbide refractory products 4 can be hung from top to bottom through the T-slot 6 in sequence; the silicon carbide refractory brick has a T-slot 6 that runs from the upper end face to the lower section, and the edges of the T-slot 6 are chamfered, and the connecting bolt assembly is embedded and matched along the T-slot 6; the two silicon carbide bricks that are adjacent in the horizontal and vertical directions are padded with refractory fiber felt 10 to seal the gap between the two refractory bricks. There is a limiting device on the silicon carbide finished brick, and there is a certain protrusion height. After adjusting the position of the nut 8 on the stud 7, it should just produce point contact with the curved surface of the blind pipe 2 shell, which can ensure that the installation size is in place; after laying two or three layers of silicon carbide bricks, the cavity formed with the blind pipe wall can be filled with silicon carbide self-flowing castable 3. During the filling process, in order to ensure that the silicon carbide self-flowing castable 3 fills the entire gap, it should be tapped gently to accelerate its flow process.
[0019] The axial curved surface of the metal fitting for connecting the stud 7 with the reserved threaded hole is wound with anti-expansion refractory fiber cotton, and at the same time, the V-shaped anchor 12 on the end surface of the spherical head has also been treated with refractory fiber cotton to prevent expansion.
[0020] The utility model is not only used in nonferrous smelting industrial devices, but also suitable for various plane walls, circumferential furnace walls and other thermal insulation scales, all of which belong to the protection scope of the present invention.
Claims
1. A high temperature and wear resistant silicon carbide refractory material and metal blind pipe composite structure, Features: The metal blind tube has a spherical head at the lower end, and a cold air heat exchange tube is fixed in the metal blind tube; a gap is provided between the lower end interface of the cold air heat exchange tube and the spherical head to effectively discharge hot gas; silicon carbide refractory bricks are suspended in an annular manner on the outer wall surface of the metal blind tube; silicon carbide self-flowing castable is filled between the silicon carbide refractory bricks and the outer wall surface of the blind tube; the silicon carbide refractory bricks, the silicon carbide self-flowing castable and the metal blind tube together constitute a high temperature resistant and wear-resistant composite structure.
2. A high temperature and wear resistant silicon carbide refractory material and metal blind pipe composite structure as claimed in claim 1, Features: The metal blind pipe is connected with a stud, and the silicon carbide refractory brick is hung on the stud of the metal blind pipe through the T-slot thereon.
3. A high temperature and wear resistant silicon carbide refractory material and metal blind pipe composite structure as claimed in claim 1, Features: The surface of the spherical head is evenly distributed with a plurality of V-shaped anchors; the spherical head is suspended and welded to the lower end of the metal blind pipe through a brick support plate; the brick support plates are six in a circumferential distribution, and there is an expansion gap between two adjacent brick support plates.
4. A high temperature and wear resistant silicon carbide refractory material and metal blind pipe composite structure as claimed in claim 1, Features: A refractory fiber felt is arranged in the gap between two adjacent silicon carbide product bricks to seal the gap between the two refractory bricks.