Refractory lining brick for industrial furnace
By designing mortise and tenon structures and closed ribs on the brick body, the problem of easy loosening and falling off of refractory linings in industrial kilns is solved, the connection strength and stability of bricks are improved, service life is extended and maintenance costs are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-03-13
AI Technical Summary
Existing refractory linings for industrial kilns are prone to loosening and falling off under complex operating conditions, and maintenance costs are high. Current technologies have failed to effectively address the need for in-depth innovation and optimization of the internal structure of bricks and their connection methods.
The brickwork is designed with opposing mortise and tenon structures and closing ribs. The mortise and tenon structure includes a tenon and a mortise, and the closing ribs are located between the opposing mortise and tenon structures. They are made of heat-resistant materials to enhance the connection strength and stability of the bricks.
It significantly extends the service life of refractory linings, ensures efficient and stable operation of industrial kilns, reduces maintenance costs, and improves overall economic benefits.
Smart Images
Figure CN223992488U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of refractory brick technology, specifically relating to a refractory lining brick for industrial kilns, applicable to various industrial kilns such as dry quenching furnaces, coke ovens, converters, annealing furnaces, annular heating furnaces, and incinerators, etc., with a wide range of applications, covering kiln refractory bricks used in metallurgy, coking, chemical industry, and environmental protection. Background Technology
[0002] The refractory lining of industrial kilns is a critical component supporting the long-term stable operation of the kilns. The vast majority of these linings are constructed of refractory bricks and operate in harsh environments. For example, the refractory lining in the inclined air duct area of a dry quenching furnace connects upwards to the annular air duct and downwards to the cooling section. Its supports are designed with inclinations, supporting the upper refractory material weighing hundreds of tons, resulting in extreme temperature gradients between the upper and lower parts. Similarly, the refractory bricks in the carbonization chamber of a coke oven are subjected to constant friction and compression from coke. These industrial kiln refractory linings not only need to withstand thermal stress fluctuations caused by internal temperature changes—which are often large and frequent—but also must endure the continuous loads during production, which are often periodic and cumulative.
[0003] In the current field of refractory lining technology for industrial kilns, although the specialized design of refractory bricks has been adjusted and optimized to a certain extent to meet the needs of size adaptation and specific applications, these improvements mainly focus on external form and functional positioning, while in-depth innovation and optimization of the internal structure of the bricks and their interconnection methods are relatively lacking. Utility Model Content
[0004] The purpose of this application is to provide a refractory lining brick for industrial kilns, which aims to fundamentally improve its durability under complex and variable working conditions. It is particularly important to significantly extend the service life through optimized structural design. This solution can not only ensure that industrial kilns maintain efficient and stable operation and reduce production interruptions caused by frequent maintenance, thereby effectively controlling and reducing maintenance costs, but also has immeasurable value for comprehensively improving the overall economic benefits and competitiveness of industrial kiln systems.
[0005] The objective of this application is achieved through the following technical solution:
[0006] A refractory lining brick for industrial kilns includes a brick body with opposing mortise and tenon structures on the brick body and closed ribs inside the brick body, the closed ribs being located between the opposing mortise and tenon structures.
[0007] Furthermore, the brick body has a cuboid structure.
[0008] Furthermore, the mortise and tenon structure includes at least one of a tenon and a mortise.
[0009] Furthermore, both the tenon and the mortise are straight structures with an isosceles trapezoidal cross-section.
[0010] Furthermore, the protrusion height of the tenon is at least the thickness of the refractory mortar plus 10 mm, and the recess depth of the mortise is at least 10 mm.
[0011] Furthermore, the brick body has at least two mortise and tenon structures on one side.
[0012] Furthermore, the mortise and tenon structure includes at least one of the following: upper and lower parts opposite each other, left and right sides opposite each other, and front and rear sides opposite each other; the closing rib includes at least one of the following: vertical closing rib and horizontal closing rib.
[0013] Furthermore, the mortise and tenon structure includes an upper tenon and a lower mortise on the bearing surface, and a vertical closing rib is provided between the upper tenon and the lower mortise.
[0014] Furthermore, the mortise and tenon structure includes opposing side tenons or side mortises on the long side, and a horizontal closing rib is provided between the opposing side tenons or side mortises.
[0015] Furthermore, the closed rib is a rectangular ring structure.
[0016] Furthermore, the closing rib is made of heat-resistant material.
[0017] The functions achieved by this application are as follows: Through the design of the structural details, this structure not only ensures the accuracy of the brick position after installation, but also improves the strength and stability of the refractory bricks themselves and the overall structure after forming the lining. It effectively solves the common problems of brick loosening, falling off and peeling during the use of refractory linings in industrial kilns, thereby significantly extending the service life of the refractory lining. This is not only of great significance to ensuring the efficient and stable operation of industrial kilns, but also provides strong support for reducing maintenance costs and improving overall economic benefits.
[0018] The beneficial effects of this application are:
[0019] (1) This technology controls the position of bricks during the refractory brick masonry process by setting the upper and lower and left and right tenons and mortises. The upper and lower tenons effectively control the positioning of the relative positions between the upper and lower bricks, and the left and right tenons and mortises of the ribs effectively control the consistency of the elevation between adjacent bricks, making the production of the precast support column more precise.
[0020] (2) The brick type, through the tenon and mortise, allows the bricks of the refractory lining to interlock and connect with each other, which strengthens the integrity of the industrial kiln lining and enables the refractory lining to withstand its own large load, impact and harsh environment such as high and low temperature alternation during its service life.
[0021] (3) The reinforcing steel bars of heat-resistant stainless steel effectively improve the strength of the tenon and mortise, making the tenon and mortise less prone to damage; on the other hand, they strengthen the brick itself and form a steel skeleton inside the brick, effectively improving the mechanical and thermal properties of the brick.
[0022] (4) This technology has wide applicability and can be used for regular block refractory bricks of various sizes and most irregular refractory bricks. Furthermore, the refractory lining made using this brick type not only has better mechanical and thermal properties, but also better overall integrity. The bending resistance, shear resistance, punching resistance, and thermal shock stability of the support columns have all been improved. This is not only of great significance for ensuring the long-term, efficient and stable operation of industrial kilns, but also provides strong support for reducing maintenance costs and improving overall economic benefits.
[0023] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding this solution, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here. Attached Figure Description
[0024] Figure 1 This is a three-dimensional structural view of this application.
[0025] Figure 2 This is a front view of the structure of this application.
[0026] Figure 3 This is a top view of the structure of this application.
[0027] In the diagram: 1-brick body, 2-upper tenon, 3-bottom mortise, 4-side tenon, 5-side mortise, 6-vertical closing rib, 7-horizontal closing rib. Detailed Implementation
[0028] The present application will be further described below with reference to specific embodiments and accompanying drawings.
[0029] Example 1
[0030] refer to Figure 1 , Figure 2 and Figure 3 As shown, a refractory lining brick for industrial kilns includes a brick body 1, a mortise and tenon structure, and closed ribs.
[0031] Brick body 1 is made of unshaped refractory material (castable) and shaped refractory material (conventional refractory brick), and is the main structure of the kiln lining. Brick body 1 is provided with opposing mortise and tenon structures, which are used to achieve the interlocking fit between two adjacent brick bodies 1, which can improve the connection accuracy and the overall strength of the connection.
[0032] The brick body 1 has a closed rib, which acts as a steel reinforcement skeleton inside the brick, strengthening the brick itself. Furthermore, the closed rib is located between the opposing mortise and tenon structures, effectively increasing the strength of the tenon and mortise, making them less prone to damage.
[0033] The mortise and tenon structure includes at least one of a tenon and a mortise, namely, three cases: including only a tenon, including only a mortise, and including both a tenon and a mortise. The tenon is inserted into the mortise to achieve a match, completing the locking and fitting between two adjacent bricks 1. Each brick 1 has at least two mortise and tenon structures on one side to ensure uniform and reliable action.
[0034] The mortise and tenon structure includes at least one of the following: top and bottom facing each other, left and right facing each other, and front and back facing each other. Specifically, it includes seven cases: only top-bottom facing, only left-right facing, only front-back facing, both top-bottom and left-right facing, both top-bottom and front-back facing, both left-right and front-back facing, and both top-bottom, left-right, and front-back facing. The number and position of the mortise and tenon structure can be adjusted according to different needs.
[0035] The closing reinforcement includes at least one of vertical closing reinforcement 6 and horizontal closing reinforcement 7, that is, it includes only vertical closing reinforcement 6, only horizontal closing reinforcement 7, and includes both vertical closing reinforcement 6 and horizontal closing reinforcement 7. The closing reinforcement can be arranged according to the arrangement of the corresponding mortise and tenon structure, or it can be arranged separately without relying on the mortise and tenon structure to improve the overall strength.
[0036] Example 2
[0037] refer to Figure 1 , Figure 2 and Figure 3 As shown, a refractory lining brick for industrial kilns includes a brick body 1, a mortise and tenon structure, and closed ribs, which is an optimized and improved version of Example 1.
[0038] Brick body 1 has a rectangular structure, which is convenient to manufacture and meets the needs of most kiln lining bricks. Similarly, depending on the requirements of the lining, brick body 1 can also adopt other structural forms.
[0039] Both the tenon and the mortise are straight structures with an isosceles trapezoidal cross section. By matching the strip-shaped tenon with the mortise, a large contact area is ensured between the two bricks. Furthermore, the isosceles trapezoid has ridges, ensuring good locking stability between the two bricks.
[0040] The protruding height of the tenon should be at least the thickness of the refractory mortar plus 10mm, and the recess depth of the mortise should be at least 10mm, so that when laying bricks, the tenon can pass through the refractory mortar and then extend into the mortise to achieve locking and limiting.
[0041] The mortise and tenon structure includes an upper tenon 2 and a bottom mortise 3 on the bearing surface (upper end face and lower end face), specifically the upper tenon 2 on the upper end face and the bottom mortise 3 on the lower end face, with a vertical closing rib 6 between the upper tenon 2 and the bottom mortise 3.
[0042] The mortise and tenon structure includes opposing side tenons 4 or side mortises 5 on the long sides (front and rear sides), specifically the upper side tenons 4 on the front and rear sides, or the side mortises 5 on the front and rear sides, with a horizontal closing rib 7 between the opposing side tenons 4 or side mortises 5.
[0043] The closed ribs are rectangular ring structures that provide ample support for the outline of the cuboid brick 1. The closed ribs are made of heat-resistant material to meet the requirements for use at high temperatures inside the kiln.
[0044] The brick has a mortise and tenon structure with upper and lower, front and back locking and limiting, and the closed ribs form a structural skeleton that supports both horizontal and vertical directions. The closed ribs strengthen the position of the mortise and tenon structure, and the horizontal and vertical closed ribs can also be welded together to form a solid support frame.
[0045] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.
[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A brick for the refractory lining of industrial furnaces, comprising a body (1), characterized in that: The brick body (1) is provided with opposite mortise and tenon structures, and a closing rib is arranged in the brick body (1) and located between the opposite mortise and tenon structures. The mortise and tenon structure includes at least one of opposite upper and bottom parts, opposite left and right sides and opposite front and back sides, and the closing rib includes at least one of a vertical closing rib (6) and a horizontal closing rib (7). The closing rib is a rectangular ring structure.
2. A brick for refractory lining of industrial furnaces according to claim 1, characterized in that: The mortise and tenon structure includes at least one of a tenon and a mortise.
3. A brick for refractory lining of industrial furnaces according to claim 2, characterized in that: The tenon and the mortise are both linear structures with isosceles trapezoidal cross sections.
4. A brick for refractory lining of industrial furnaces according to claim 2, characterized in that: The protruding height of the tenon is at least the thickness of the refractory mortar plus 10 mm, and the recessed depth of the mortise is at least 10 mm.
5. The brick for refractory lining of industrial furnaces according to claim 1, characterized in that: At least two mortise and tenon structures are arranged on a single face of the brick body (1).
6. A brick for refractory lining of industrial furnaces according to claim 1, characterized in that: The mortise and tenon structure includes opposite upper tenons (2) and bottom mortises (3) on the bearing surface, and a vertical closing rib (6) is arranged between the opposite upper tenons (2) and the bottom mortises (3).
7. A brick for refractory lining of industrial furnaces according to claim 1 or 6, characterized in that: The mortise and tenon structure includes opposite side tenons (4) or side mortises (5) on the long side, and a horizontal closing rib (7) is arranged between the opposite side tenons (4) or the side mortises (5).
8. A brick for refractory lining of industrial furnaces according to claim 1, characterized in that: The closing rib is made of a heat-resistant material.