Low density chills for dry quenching furnaces
By introducing structures such as arc grooves, stepped protrusions, and closed holes into the anti-carburization low-density clay bricks used in dry quenching furnaces, the complexity of construction and carburization problems have been solved, achieving higher installation accuracy and structural stability, and extending the service life of the dry quenching furnace.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU ZHONGKEDA REFRACTORY CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-06-09
AI Technical Summary
In the current construction of dry quenching furnaces, the structural design of anti-carburization low-density clay bricks is complex, which leads to high construction difficulty and difficulty in quality control. In addition, the bricks are susceptible to high-temperature creep and carburization, which affects the structural stability and service life of the furnace lining.
The design incorporates structural features such as arc-shaped grooves, stepped protrusions, closed holes, Y-shaped anchors, positioning blocks, and flow guide channels to achieve mechanical interlocking and stable connection of the bricks, prevent carbon media penetration, reduce heat loss, and improve installation accuracy and reliability through flow guide slopes and limiting structures.
It improved the installation accuracy and construction quality of the bricks, reduced the construction difficulty, enhanced the structural stability and anti-carburization ability of the bricks, and extended the service life of the dry quenching furnace.
Smart Images
Figure CN224340688U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of clay brick technology, and in particular to a low-density clay brick with anti-carburization properties for dry quenching furnaces. Background Technology
[0002] The construction of a dry quenching furnace (CDQ) is a complex system engineering project involving the precise laying of various refractory materials, including carburizing-resistant low-density clay bricks. Its core objective is to ensure the airtightness, structural stability, thermal expansion compensation capacity, and long-term service life of the furnace lining. Especially in the construction of the annular gas duct wall, carburizing-resistant low-density clay bricks are typically used as the working layer or insulation layer. Because the annular gas duct wall requires a high degree of precision, the structural design of the brick body itself is fundamental. A reasonable brick structure can significantly reduce construction difficulty, minimize human error, and improve laying efficiency and overall quality. Based on this, this utility model proposes a carburizing-resistant low-density clay brick for dry quenching furnaces. Utility Model Content
[0003] The purpose of this invention is to provide a low-density clay brick resistant to carburization for dry quenching furnaces, thereby solving the aforementioned problems.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] This utility model discloses a low-density clay brick for dry quenching furnaces that resists carburization. The brick includes a body, on the lower end surface of which several arc-shaped grooves are equidistantly provided, and on the upper end surface of which several stepped protrusions matching the arc-shaped grooves are equidistantly provided. The interior of the body is provided with several closed holes, and the left and right side walls of the body are symmetrically provided with placement grooves for placing Y-shaped anchors. The bottom end of the vertical part of the Y-shaped anchor is integrally formed with a limiting base.
[0006] Furthermore, positioning blocks are symmetrically arranged on the lower end face of the body, and positioning grooves matching the positioning blocks are opened on the upper end face of the body.
[0007] Furthermore, several guide grooves are equally spaced on the left and right side walls of the main body, and the guide grooves on the left and right sides are staggered with each other.
[0008] Furthermore, the guide channel is symmetrically provided with guide slopes pointing towards the center of the main body.
[0009] Furthermore, the gradient of the guide slope is 5°.
[0010] Furthermore, the front end face of the body is provided with a number of grooves at equal intervals, and the rear end face is provided with a number of protrusions at equal intervals that cooperate with the grooves.
[0011] Furthermore, the edges of the body, the arc-shaped groove, and the placement groove are all rounded with a radius of 0.3mm.
[0012] Compared with the prior art, the beneficial technical effects of this utility model are as follows:
[0013] This utility model of a low-density, carburizing-resistant clay brick for dry quenching furnaces features a combination of arc-shaped grooves and stepped protrusions, as well as a combination of positioning blocks and positioning grooves, which facilitates correct installation of the bricks and provides mechanical interlocking between adjacent bricks to prevent displacement. Furthermore, the placement groove design facilitates the installation of Y-type anchors. In summary, this utility model of a low-density, carburizing-resistant clay brick for dry quenching furnaces makes construction quality more controllable and reliable, ultimately ensuring a long service life for the dry quenching furnace lining. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings.
[0015] Figure 1 This is a schematic diagram of the structure of the anti-carburization low-density clay brick for the dry quenching furnace of this utility model;
[0016] Figure 2 This is a partial cross-sectional view of the anti-carburization low-density clay brick for the dry quenching furnace of this utility model;
[0017] Figure 3 This is an enlarged view of A;
[0018] Explanation of reference numerals in the attached drawings: 1. Body; 2. Arc-shaped groove; 3. Stepped protrusion; 4. Placement groove; 5. Guide groove; 6. Positioning block; 7. Groove; 8. Y-type anchor; 9. Limiting base; 10. Sealing hole; 11. Guide slope. Detailed Implementation
[0019] like Figure 1-3 As shown, a low-density clay brick for dry quenching furnaces with anti-carburization properties includes a body 1. Several arc-shaped grooves 2 are equidistantly formed on the lower end surface of the body 1, and several stepped protrusions 3 that match the arc-shaped grooves 2 are equidistantly formed on the upper end surface of the body 1. The stepped structure disperses shear force, and the arc-shaped grooves 2 are shallow grooves to protect the strength of the main body. The two achieve mechanical interlocking to prevent displacement, facilitate precise alignment, and reduce the difficulty of masonry.
[0020] The body 1 has several closed holes 10 inside. In a high-temperature environment containing carbon, carbonaceous media (such as carbon monoxide, hydrocarbons, solid carbon particles, etc.) can easily penetrate into the brick body through the open pores of the material, causing "carburization" of the brick. Carburization will damage the mineral structure of the clay brick (such as carbonizing the silicate phase and producing brittle carbides), leading to a decrease in brick strength, cracking, or even spalling. The closed holes 10 can cut off the penetration path of the carbonaceous media, preventing it from entering the brick body, fundamentally inhibiting carburization and protecting the structural stability of the brick. In addition, the gas inside the closed holes 10 is enclosed in an independent space, making it difficult to form convective heat transfer. Moreover, the gas itself has low thermal conductivity, which can significantly reduce the overall thermal conductivity of the brick body, thereby reducing heat loss. At the same time, the design of the closed holes 10 can reduce the weight of the brick body, thereby reducing the overall load of the dry quenching furnace, reducing the mechanical load on the dry quenching furnace structure, and extending the service life of the dry quenching furnace.
[0021] The left and right side walls of the main body 1 are symmetrically provided with placement grooves 4 for Y-shaped anchors 8. The bottom of the vertical part of the Y-shaped anchor 8 is integrally formed with a limiting base 9. One end of the Y-shaped anchor 8 is placed in the placement groove 4 and, under the restraint of the limiting base 9, abuts against one side of the brick. The other end is welded or bolted to the furnace shell steel structure, forming a rigid connection system of "brick-anchor-furnace shell". This system can counteract the displacement tendency of the brick due to thermal expansion and prevent the brick from loosening and falling off due to high-temperature creep or vibration. In addition, a recess for placing the limiting base 9 can be provided on the end face of the main body 1 to ensure the flatness between the Y-shaped anchor 8 and the surface of the main body 1 after installation.
[0022] Positioning blocks 6 are symmetrically arranged on the lower end face of the main body 1, and positioning grooves matching the positioning blocks 6 are opened on the upper end face of the main body 1, which makes it easy to install correctly and provides mechanical interlocking between adjacent bricks to prevent displacement.
[0023] Several guide channels 5 are equidistantly arranged on the left and right side walls of the main body 1, and the guide channels 5 on the left and right sides are staggered. A guide slope 11, pointing towards the center of the main body, is symmetrically arranged within each guide channel 5, and the guide slope 11 has a slope of 5°. The guide slope automatically guides the mud filling, reducing the need for manual scraping.
[0024] The front end face of the main body 1 is provided with a number of grooves 7 at equal intervals, and the rear end face is provided with a number of protrusions that cooperate with the grooves 7 at equal intervals, so as to improve the alignment accuracy during the double-row parallel installation process and reduce the difficulty of masonry.
[0025] The edges of the main body 1, the arc-shaped groove 2, and the placement groove 4 are all rounded with 0.3mm corners to prevent edge chipping.
[0026] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A low-density clay brick resistant to carburization for dry quenching furnaces, characterized in that: The body (1) includes a body (1), on the lower end surface of the body (1) are a plurality of arc-shaped grooves (2) at equal intervals, and on the upper end surface of the body (1) are a plurality of stepped protrusions (3) at equal intervals that match the arc-shaped grooves (2); the body (1) has a plurality of closed holes (10) inside, and the left and right side walls of the body (1) are symmetrically provided with placement grooves (4) for placing Y-type anchors (8), and the bottom of the vertical part of the Y-type anchor (8) is integrally formed with a limiting base (9).
2. The anti-carburization low-density clay brick for dry quenching furnaces according to claim 1, characterized in that: The lower end face of the body (1) is symmetrically provided with positioning blocks (6), and the upper end face of the body (1) is provided with positioning grooves that match the positioning blocks (6).
3. The anti-carburization low-density clay brick for dry quenching furnaces according to claim 1, characterized in that: The main body (1) has several guide grooves (5) evenly spaced on its left and right side walls, and the guide grooves (5) on the left and right sides are staggered.
4. The anti-carburization low-density clay brick for dry quenching furnaces according to claim 3, characterized in that: The guide channel (5) is symmetrically provided with guide slopes (11) pointing towards the center of the main body.
5. The anti-carburization low-density clay brick for dry quenching furnaces according to claim 4, characterized in that: The slope of the guide slope (11) is 5°.
6. The anti-carburization low-density clay brick for dry quenching furnaces according to claim 1, characterized in that: The front end face of the body (1) is provided with a number of grooves (7) at equal intervals, and the rear end face is provided with a number of protrusions that cooperate with the grooves (7) at equal intervals.
7. The anti-carburization low-density clay brick for dry quenching furnaces according to claim 1, characterized in that: The edges of the main body (1), the arc groove (2), and the placement groove (4) are all rounded with a radius of 0.3mm.