Split replaceable blast furnace chute wear-resistant lining plate structure

Abstract

The application relates to the technical field of cloth chutes, and particularly discloses a split replaceable blast furnace chute wear-resistant lining plate structure. The second wear-resistant lining plate can be disassembled and assembled independently of the first wear-resistant lining plate, an installation structure realizes end-to-end butt joint of the second wear-resistant lining plate and the first wear-resistant lining plate, and a limiting structure cooperates to constrain the displacement direction of the second wear-resistant lining plate. When the feeding end of the cloth chute body is locally worn, the lining plate does not need to be replaced as a whole, and only the second wear-resistant lining plate needs to be replaced, so that the problem that the traditional whole lining plate is scrapped due to local failure is eliminated, the material utilization rate is greatly improved, and the maintenance cost of replacing the lining plate is greatly reduced.

Description

Technical Field

[0001] This application relates to the field of feeding chute technology, and in particular to a split, replaceable wear-resistant lining structure for blast furnace chutes. Background Technology

[0002] The blast furnace charging chute is a core feeding device in modern metallurgical blast furnaces. Installed below the rotating device on the furnace top, it is responsible for precisely distributing furnace materials such as sinter and coke to specific areas inside the blast furnace. By adjusting the chute's tilt angle and rotation speed, it can achieve spiral, annular, or fan-shaped charging patterns, directly determining the airflow distribution, heat transfer, and chemical reaction efficiency within the blast furnace. It is a key piece of equipment for ensuring the uniformity of molten iron quality and energy utilization, and is widely used in continuous production processes of large blast furnaces with a capacity of 2000 m³ or more.

[0003] During blast furnace operation, high-temperature furnace charge impacts the chute working face at a speed of 8-12 m / s. Sintered ore has a Mohs hardness of 6-7 and contains sharp edges, while coke exhibits high abrasiveness. As the surface layer directly in contact with the materials, the wear-resistant liner must continuously withstand the triple damage of physical impact abrasion, high-temperature oxidation, and acidic furnace gas corrosion. Currently, liners generally adopt an integral welded structure, where a single piece of wear-resistant alloy steel plate is welded and fixed to the chute substrate. This high-hardness surface resists abrasive wear, with a single service life of approximately 3-6 months.

[0004] The integral liner has significant drawbacks in practical applications: when a local area fails due to excessive wear, the entire liner needs to be replaced. The unworn area accounts for about 60%-70% of the liner area, and because the structure is indivisible, the entire liner has to be scrapped, resulting in material waste and a significant increase in costs. Utility Model Content

[0005] In order to overcome the problems of high replacement cost and low material utilization of traditional integral wear-resistant liners due to local wear, this application provides a split replaceable blast furnace chute wear-resistant liner structure.

[0006] The split, replaceable blast furnace chute wear-resistant liner structure provided in this application adopts the following technical solution: A split, replaceable blast furnace chute wear-resistant liner structure includes a charging chute body. A first wear-resistant liner is fixed on the bottom wall of the charging chute body away from the feed end. A second wear-resistant liner is provided on the bottom wall of the charging chute body near the feed end. An installation structure for installing the second wear-resistant liner onto the end of the first wear-resistant liner is provided between the second wear-resistant liner and the bottom wall of the charging chute body. A limiting structure for limiting the installation of the second wear-resistant liner is also provided between the charging chute body and the second wear-resistant liner.

[0007] By adopting the above technical solution, the second wear-resistant liner can be disassembled and installed independently of the first wear-resistant liner. The installation structure enables the end connection between the second and first wear-resistant liners, and the limiting structure constrains the displacement direction of the second wear-resistant liner. When the feed end of the fabric chute body experiences localized wear, it is not necessary to replace the entire liner; only the second wear-resistant liner needs to be replaced. This eliminates the problem of localized failure and subsequent scrapping of the traditional integral liner, significantly improving material utilization and greatly reducing the maintenance cost of liner replacement.

[0008] Optionally, the installation structure includes a snap-fit ​​cavity formed between the end of the first wear-resistant liner and the inner wall of the fabric chute body near the feed end, wherein the second wear-resistant liner is adapted to the snap-fit ​​cavity and is slidably snapped into the snap-fit ​​cavity.

[0009] By adopting the above technical solution, the second wear-resistant liner is slidably engaged within the engagement cavity formed by the end of the first wear-resistant liner and the inner wall of the chute, forming a boltless mechanical insertion structure. This design significantly shortens the replacement time of the second wear-resistant liner and avoids substrate deformation caused by the heat-affected zone of welding.

[0010] Optionally, a snap-fit ​​groove is provided on the bottom wall of the fabric chute body near the feed end, corresponding to the second wear-resistant liner, and the bottom of the second wear-resistant liner is snapped into the snap-fit ​​groove.

[0011] By adopting the above technical solution, the snap-fit ​​groove of the fabric chute body and the bottom of the second wear-resistant liner form a double-stage snap-fit ​​point, which further restricts the radial runout of the second wear-resistant liner and further improves the stability of the installation of the second wear-resistant liner.

[0012] Optionally, the limiting structure includes a limiting groove (21) opened on the side wall of the fabric chute body near the feed end and a limiting strip correspondingly arranged on the side of the second wear-resistant liner. The limiting groove (21) is opened through the end of the fabric chute body and extends along the length direction of the side wall of the fabric chute body. The limiting strip extends along the length direction of the side of the second wear-resistant liner and is slidably adapted to be installed in the limiting groove (21).

[0013] By adopting the above technical solution, the limiting strip is slidably guided by the limiting groove (21) embedded in the side. The limiting groove (21) provides axial guidance for the limiting strip in the length direction. The groove wall of the limiting groove (21) restricts the lateral displacement of the limiting strip, so that the second wear-resistant liner can be stably installed on the bottom wall of the fabric chute body.

[0014] Optionally, the height of the second wear-resistant liner away from the bottom wall of the fabric chute body is higher than the height of the first wear-resistant liner away from the side wall of the fabric chute body.

[0015] By adopting the above technical solution, the working surface height of the second wear-resistant liner is higher than that of the first wear-resistant liner, forming a stepped drop. This induces the furnace charge to preferentially impact the second wear-resistant liner in the high-wear zone, allowing the welded and fixed first wear-resistant liner to be used for a longer time, thus extending the service life of the first wear-resistant liner.

[0016] Optionally, a guide plate is fixed to the end of the second wear-resistant liner near the end of the first wear-resistant liner. The bottom wall of the guide plate is in contact with the top of the first wear-resistant liner. The top of the guide plate is set as an inclined surface, and the thickness of the guide plate gradually narrows from the connection point between the second wear-resistant liner and the first wear-resistant liner to the point away from the connection point between the second wear-resistant liner and the first wear-resistant liner.

[0017] By adopting the above technical solution, the inclined structure of the guide plate guides the material flow smoothly, and its decreasing thickness design creates a streamlined acceleration channel. This eliminates material accumulation at the connection between the first and second wear-resistant liners, making the material discharge smoother.

[0018] Optionally, the second wear-resistant liner is inclined on the side away from the bottom wall of the fabric chute body, the thickness of the second wear-resistant liner gradually narrows from the feed end near the fabric chute body to the feed end away from the fabric chute body, and the upper surface of the end of the second wear-resistant liner away from the feed end of the fabric chute body is flush with the upper surface of the end of the guide plate near the feed end of the fabric chute body.

[0019] By adopting the above technical solution, the side of the second wear-resistant liner plate near the feed end of the fabric chute body becomes more wear-resistant, thereby extending the service life of the second wear-resistant liner plate.

[0020] In summary, this application includes at least one of the following beneficial technical effects: This innovation achieves modular and rapid replacement of the wear area of ​​the blast furnace chute by combining a split wear-resistant liner structure design with a double-stage snap-fit ​​installation structure: the second wear-resistant liner is positioned by sliding insertion through the snap-fit ​​cavity, and the bottom is embedded in the snap-fit ​​groove to form a mechanical interlock, which greatly shortens the time for a single replacement and greatly improves the material utilization rate. With the guidance and constraint of the limiting groove (21) and the limiting strip, the damage to the substrate caused by welding heat deformation and thermal expansion mismatch is completely avoided, and the maintenance cost is greatly reduced. The working surface of the second wear-resistant liner is higher than that of the first wear-resistant liner, forming a material drop step. This forces the impact angle of the furnace charge to decrease. Combined with the gradual slope and continuous curved surface guide design of the guide plate, a smooth acceleration channel is constructed. This structure can reduce material accumulation, reduce eddy current wear at the end of the liner, and significantly extend the service life of the liner. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the replaceable blast furnace chute wear-resistant liner in the embodiments of this application; Figure 2 This is a partial structural schematic diagram of the replaceable blast furnace chute wear-resistant liner structure shown in the figure. Figure 3 yes Figure 1 A schematic diagram of the structure of the second wear-resistant liner.

[0023] Reference numerals in the attached drawings: 1. Fabric chute body; 11. First wear-resistant liner; 12. Second wear-resistant liner; 13. Engagement cavity; 2. Limiting structure; 21. Limiting groove; 22. Limiting strip; 3. Engagement groove; 4. Guide plate. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail below.

[0025] This application discloses a split, replaceable blast furnace chute wear-resistant liner structure.

[0026] Reference Figure 1 and Figure 2 A split-type replaceable blast furnace chute wear-resistant liner structure includes a charging chute body 1, a first wear-resistant liner 11 fixed on the bottom wall of the charging chute body 1 away from the feed end, a second wear-resistant liner 12 provided on the bottom wall of the charging chute body 1 near the feed end, an installation structure for installing the second wear-resistant liner 12 onto the end of the first wear-resistant liner 11 provided between the second wear-resistant liner 12 and the bottom wall of the charging chute body 1, and a limiting structure 2 for limiting the installation of the second wear-resistant liner 12 provided between the charging chute body 1 and the second wear-resistant liner 12.

[0027] The second wear-resistant liner 12 can be disassembled and assembled independently of the first wear-resistant liner 11. The installation structure enables the end docking of the second wear-resistant liner 12 and the first wear-resistant liner 11, and the limiting structure 2 constrains the displacement direction of the second wear-resistant liner 12.

[0028] When the feed end of the fabric chute body 1 is partially worn, there is no need to replace the entire liner plate. Only the second wear-resistant liner plate 12 needs to be replaced. This eliminates the problem of local failure and scrapping of the traditional whole liner plate, greatly improves the material utilization rate, and significantly reduces the maintenance cost of replacing the liner plate.

[0029] Reference Figure 1 and Figure 2 The installation structure includes a snap-fit ​​cavity 13 formed between the end of the first wear-resistant liner 11 and the inner wall of the fabric chute body 1 near the feed end. The second wear-resistant liner 12 is adapted to the snap-fit ​​cavity 13 and is slidably snapped into the snap-fit ​​cavity 13.

[0030] The second wear-resistant liner 12 is slidably engaged within the engagement cavity 13 formed by the end of the first wear-resistant liner 11 and the inner wall of the chute, forming a boltless mechanical connection structure. This design significantly reduces the replacement time of the second wear-resistant liner 12 and avoids substrate deformation caused by the heat-affected zone of welding.

[0031] Reference Figure 1 and Figure 2 On the bottom wall of the fabric chute body 1 near the feed end, a snap-fit ​​groove 3 is provided corresponding to the second wear-resistant liner 12, and the bottom of the second wear-resistant liner 12 is snapped into the snap-fit ​​groove 3.

[0032] The snap-fit ​​groove 3 of the fabric chute body 1 forms a double-stage snap-fit ​​point with the bottom of the second wear-resistant liner 12, which further restricts the radial runout of the second wear-resistant liner 12 and further improves the stability of the installation of the second wear-resistant liner 12.

[0033] Reference Figure 2 and Figure 3 The limiting structure 2 includes a limiting groove 21 opened on the side wall of the fabric chute body 1 near the feed end and a limiting strip 22 correspondingly arranged on the side of the second wear-resistant liner 12. The limiting groove 21 is opened through the end of the fabric chute body 1 and extends along the length direction of the side wall of the fabric chute body 1. The limiting strip 22 extends along the length direction of the side of the second wear-resistant liner 12 and is slidably fitted into the limiting groove 21.

[0034] The limiting strip 22 is inserted into the limiting groove 21 along the side and slidably guided. The limiting groove 21 provides axial guidance for the limiting strip 22 in the length direction. The groove wall of the limiting groove 21 restricts the lateral displacement of the limiting strip 22, so that the second wear-resistant liner 12 can be stably installed on the bottom wall of the fabric chute body 1.

[0035] The height of the second wear-resistant liner 12 away from the bottom wall of the fabric chute body 1 is higher than the height of the first wear-resistant liner 11 away from the side wall of the fabric chute body 1.

[0036] The design of the working surface of the second wear-resistant liner 12 being higher than that of the first wear-resistant liner 11 creates a stepped drop, which can induce the furnace charge to preferentially impact the second wear-resistant liner 12 in the high wear zone, thereby enabling the welded and fixed first wear-resistant liner 11 to be used for a longer time and extending the service life of the first wear-resistant liner 11.

[0037] Reference Figure 2 and Figure 3 A guide plate 4 is fixed to the end of the second wear-resistant liner 12 near the end of the first wear-resistant liner 11. The bottom wall of the guide plate 4 is in contact with the top of the first wear-resistant liner 11. The top of the guide plate 4 is set as an inclined surface. The thickness of the guide plate 4 gradually narrows from the connection between the second wear-resistant liner 12 and the first wear-resistant liner 11 to the connection away from the second wear-resistant liner 12 and the first wear-resistant liner 11.

[0038] The inclined structure of the guide plate 4 guides the material flow smoothly, and its decreasing thickness design creates a streamlined acceleration channel. This eliminates material accumulation at the connection between the first wear-resistant liner 11 and the second wear-resistant liner 12, making the material discharge smoother.

[0039] The second wear-resistant liner 12 is inclined on the side away from the bottom wall of the fabric chute body 1. The thickness of the second wear-resistant liner 12 gradually narrows from the feed end near the fabric chute body 1 to the feed end away from the fabric chute body 1. The upper surface of the end of the second wear-resistant liner 12 away from the feed end of the fabric chute body 1 is flush with the upper surface of the end of the guide plate 4 near the feed end of the fabric chute body 1.

[0040] The implementation principle of the split-type replaceable blast furnace chute wear-resistant liner structure in this application embodiment is as follows: the second wear-resistant liner 12 can be disassembled and installed independently of the first wear-resistant liner 11. The installation structure enables the end connection between the second wear-resistant liner 12 and the first wear-resistant liner 11, and the limiting structure 2 constrains the displacement direction of the second wear-resistant liner 12. When the feeding end of the feeding chute body 1 is partially worn, it is not necessary to replace the entire liner; only the second wear-resistant liner 12 needs to be replaced. This eliminates the problem of partial failure and subsequent scrapping of the traditional integral liner, greatly improves material utilization, and significantly reduces the maintenance cost of liner replacement.

[0041] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A split, replaceable, wear-resistant lining plate structure for blast furnace chutes, characterized in that: The system includes a fabric chute body (1), on which a first wear-resistant liner (11) is fixed on the bottom wall away from the feed end, and a second wear-resistant liner (12) is provided on the bottom wall near the feed end. An installation structure for installing the second wear-resistant liner (12) onto the end of the first wear-resistant liner (11) is provided between the second wear-resistant liner (12) and the bottom wall of the fabric chute body (1). A limiting structure (2) for limiting the installation of the second wear-resistant liner (12) is also provided between the fabric chute body (1) and the second wear-resistant liner (12).

2. The split-type replaceable blast furnace chute wear-resistant liner structure according to claim 1, characterized in that: The installation structure includes a snap-fit ​​cavity (13) formed between the end of the first wear-resistant liner (11) and the inner wall of the fabric chute body (1) near the feed end. The second wear-resistant liner (12) is adapted to the snap-fit ​​cavity (13) and is slidably snapped into the snap-fit ​​cavity (13).

3. The split-type replaceable blast furnace chute wear-resistant liner structure according to claim 2, characterized in that: The fabric chute body (1) has a snap-fit ​​groove (3) on the bottom wall near the feed end, corresponding to the second wear-resistant liner (12), and the bottom of the second wear-resistant liner (12) is snapped into the snap-fit ​​groove (3).

4. The split-type replaceable blast furnace chute wear-resistant liner structure according to claim 1, characterized in that: The limiting structure (2) includes a limiting groove (21) opened on the side wall of the fabric chute body (1) near the feed end and a limiting strip (22) correspondingly arranged on the side of the second wear-resistant liner (12). The limiting groove (21) is opened through the end of the fabric chute body (1) and extends along the length direction of the side wall of the fabric chute body (1). The limiting strip (22) extends along the length direction of the side of the second wear-resistant liner (12). The limiting strip (22) is slidably fitted into the limiting groove (21).

5. The split-type replaceable blast furnace chute wear-resistant liner structure according to claim 1, characterized in that: The height of the second wear-resistant liner (12) away from the bottom wall of the fabric chute body (1) is higher than the height of the first wear-resistant liner (11) away from the side wall of the fabric chute body (1).

6. The split-type replaceable blast furnace chute wear-resistant liner structure according to claim 5, characterized in that: The second wear-resistant liner (12) is fixed with a guide plate (4) at the end near the first wear-resistant liner (11). The bottom wall of the guide plate (4) is in contact with the top of the first wear-resistant liner (11). The top of the guide plate (4) is set as an inclined slope. The thickness of the guide plate (4) gradually narrows from the connection point near the second wear-resistant liner (12) and the first wear-resistant liner (11) to the point away from the connection point of the second wear-resistant liner (12) and the first wear-resistant liner (11).

7. The split-type replaceable blast furnace chute wear-resistant liner structure according to claim 6, characterized in that: The second wear-resistant liner (12) is inclined on the side away from the bottom wall of the fabric chute body (1). The thickness of the second wear-resistant liner (12) gradually narrows from the feed end near the fabric chute body (1) to the feed end away from the fabric chute body (1). The upper surface of the end of the second wear-resistant liner (12) away from the feed end of the fabric chute body (1) is flush with the upper surface of the end of the guide plate (4) near the feed end of the fabric chute body (1).

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