Wear-resistant blast furnace distribution chute

Abstract

The utility model relates to a wear-resistant blast furnace distribution chute and relates to the field of blast furnaces. The structure comprises a chute body (1), a wear-resistant layer (2) is formed in the chute body (1) in a pouring mode, the wear-resistant layer (2) is in a U shape, and a plurality of buffering material accumulation grooves (4) are formed in the wear-resistant layer (2) at intervals from top to bottom in the material distribution direction. A partition plate (6) is arranged at the discharging end of the chute body (1) and supports the end face of the abrasion-resistant layer (2). Protruding connecting ribs (5) are fixedly arranged on the inner surface of the chute body (1), and the connecting ribs (5) are poured in the abrasion-resistant layer (2). The wear-resistant layer is formed by pouring a pouring material, so that the cost is low, the wear-resistant layer can be directly poured and repaired on the chute body after being worn or worn through, the chute does not need to be replaced by long-time damping down, and the yield loss and the cost loss of chute replacement caused by long-time damping down are reduced.

Description

Technical Field

[0001] The utility model relates to a distributing chute for a blast furnace. Background Art

[0002] During the production process of a blast furnace, burden needs to be evenly sprinkled into the blast furnace through a distributing chute. Currently, wear-resistant liners are usually adopted inside the distributing chute, and the wear-resistant liners are in direct contact with the burden. Since the distributing chute works in an environment of 100 - 300 °C for a long time, and is also directly impacted and worn by the burden, after being used for a period of time, the rib plates will be damaged and worn through. It is necessary to shut down the blast furnace for maintenance to replace the distributing chute, and each replacement of the distributing chute usually takes 8 - 10 hours. Calculated comprehensively, each replacement of the distributing chute will cause losses of millions of yuan.

[0003] Currently, among the well-known distributing chutes, such as a new type of blast furnace distributing chute disclosed in Chinese Patent Application No. 201721643748.9, which is composed of a gooseneck body and a trough body. The wear-resistant layer of this distributing chute is in continuous direct contact with the burden and cannot slow down the impact through accumulated material. After being damaged and worn through, it can only be replaced by shutting down the blast furnace and cannot be quickly repaired on the basis of the original chute. Summary of the Utility Model

[0004] The utility model provides a distributing chute for a blast furnace aiming at the above-mentioned prior art. During the feeding process, the accumulating trough will be continuously filled with burden to slow down the direct impact of the burden on the chute, improve the service life of the chute, and can be quickly repaired on the basis of the original chute after being damaged, with fast replacement and no need to shut down the blast furnace.

[0005] The technical solution adopted by the utility model to solve the above problems is: a distributing chute, characterized in that: it includes a chute body, and a wear-resistant layer is formed by casting inside the chute body. The wear-resistant layer is U-shaped, and a plurality of buffer accumulating troughs are formed at intervals along the cloth direction from top to bottom.

[0006] Preferably, a partition is arranged at the discharging end of the chute body, and the partition supports the end face of the wear-resistant layer. When casting the wear-resistant layer, the casting material flows down along the chute body until it is blocked by the partition, and forms the wear-resistant layer after solidification.

[0007] Preferably, protruding connecting ribs are fixedly arranged on the inner surface of the chute body, and the connecting ribs are cast in the wear-resistant layer. The connecting ribs are used to fixedly connect the wear-resistant layer and the chute body to prevent the two from separating.

[0008] Preferably, the connecting ribs are V-shaped and are evenly distributed on the inner surface of the chute body.

[0009] Preferably, a plurality of arc-shaped ribs are arranged at intervals and in parallel along the fabric direction on the surface of the wear-resistant layer, and the arc-shaped ribs partition the inside of the wear-resistant layer into a plurality of the buffer material accumulation grooves. Further, during the feeding process, the surface arc-shaped ribs are continuously filled with furnace materials inside, so that when the subsequent furnace materials pass through the chute body, they collide with the furnace materials filled in the material accumulation grooves by friction, effectively reducing the direct impact of the furnace materials on the wear-resistant materials inside the chute during the descending process.

[0010] Preferably, the plurality of arc-shaped ribs form the same angle with the horizontal plane, and the angle range is 30° to 60°, and the distance between adjacent arc-shaped ribs is the same. The surface of the lower section of the wear-resistant layer is in a smooth arc shape.

[0011] Compared with the prior art, the advantages of the present utility model are as follows:

[0012] (1) The wear-resistant layer is formed by casting with a casting material, which has a low cost. And after wear or abrasion, it can be directly cast and repaired on the chute body without long-term blast furnace shutdown for replacing the chute, reducing the output loss caused by long-term blast furnace shutdown and the cost loss of replacing the chute.

[0013] (2) The wear-resistant layer is provided with a plurality of buffer material accumulation grooves, which helps to continuously fill the furnace materials in the material accumulation grooves during the descending process of the furnace materials, slow down the impact of the furnace materials on the wear-resistant materials during the descending process, and improve the service life of the chute. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the cloth chute in the embodiment of the present utility model;

[0015] Figure 2 It is a schematic structural diagram of the chute body in the embodiment of the present utility model;

[0016] Figure 3 It is a top view of the cloth chute in the embodiment of the present utility model;

[0017] In the figure, 1, chute body; 2, wear-resistant layer; 3, arc-shaped rib; 4, buffer material accumulation groove; 5, connecting rib; 6, partition board. Specific Embodiments

[0018] The following further describes the present utility model in detail with reference to the drawings. The embodiments are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model. The text description in this embodiment corresponds to the drawings, and the description of directions is also based on the drawings, and should not be construed as a limitation to the protection scope of the present utility model.

[0019] Such as Figures 1 to 3As shown in the figure, the blast furnace burden distributing chute in this embodiment includes a chute body 1, connecting ribs 5, and a wear-resistant layer 2 provided inside the chute body 1. The wear-resistant layer is formed by casting wear-resistant castable. Multiple spaced parallel arc-shaped ribs 3 are arranged in the upper and middle parts of the surface of the wear-resistant layer 2, and the arc-shaped ribs 3 are perpendicular to the burden distribution direction of the burden distributing chute.

[0020] Further, the chute body 1 is U-shaped, and partition plates 6 connected to the chute body 1 are respectively arranged at the upper and lower ends.

[0021] Further, the connecting ribs 5 are made of stainless steel and are distributed at various parts of the inner wall of the chute body 1 in a "V" shape by welding.

[0022] Further, the wear-resistant layer 2 is formed by casting wear-resistant castable. After internal wear or abrasion through, there is no need to shut down the furnace for a long time to replace the chute. It can be directly cast and repaired on the basis of the original chute body, effectively reducing the shutdown time and the losses caused by replacing the chute.

[0023] Further, multiple spaced parallel arc-shaped ribs 3 in the upper and middle parts of the wear-resistant layer 2 partition the inside of the chute into multiple buffer stockpiling grooves 4 perpendicular to the material conveying direction. Thus, during the feeding process, the surface arc-shaped ribs are continuously filled with furnace charge inside, so that the subsequent furnace charge collides with the furnace charge filled in the stockpiling grooves 4 when passing through the inside of the chute body, effectively slowing down the direct impact of the furnace charge on the wear-resistant material 2 inside the chute during the descending process.

[0024] Furthermore, the arc-shaped ribs 3 form the same angle with the horizontal plane, and the angle range is 30° - 60°. The distance between adjacent arc-shaped ribs 3 is the same, and the lower surface of the castable layer 2 is in a smooth arc shape to ensure smooth feeding at the lower part.

[0025] The burden distributing chute with the above structure has low maintenance cost. After the wear-resistant layer is worn or abraded through, it can be directly cast and repaired on the original basis without shutting down the furnace for a long time to replace the chute, reducing the output loss caused by long-term furnace shutdown and the cost loss of replacing the chute.

[0026] In addition to the above embodiments, the present utility model also includes other implementation manners. All technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present utility model.

Claims

1. A material distribution chute, characterized in that: It comprises a chute body (1), a wear-resistant layer (2) is cast inside the chute body (1), the wear-resistant layer (2) is U-shaped, and the wear-resistant layer (2) forms a plurality of buffer material accumulation grooves (4) at intervals from top to bottom along the material distribution direction.

2. The material distribution chute according to claim 1, characterized in that: A partition plate (6) is provided at the discharge end of the chute body (1), and the partition plate (6) supports the end surface of the wear-resistant layer (2).

3. The material distribution chute according to claim 1, characterized in that: The inner surface of the chute body (1) is fixedly provided with protruding connecting ribs (5), and the connecting ribs (5) are cast in the wear-resistant layer (2).

4. The material distribution chute according to claim 3, characterized in that: The connecting ribs (5) are V-shaped and evenly distributed on the inner surface of the chute body (1).

5. The material distribution chute according to claim 1, characterized in that: The surface of the wear-resistant layer (2) is provided with a plurality of spaced and parallel arc-shaped ribs (3) along the cloth-distributing direction, and the arc-shaped ribs (3) divide the interior of the wear-resistant layer into a plurality of buffer material accumulation grooves (4).

6. The material distribution chute according to claim 5, characterized in that: The plurality of arc-shaped ribs (3) are at the same angle with the horizontal plane, the angle range is 30° to 60°, and the distances between adjacent arc-shaped ribs (3) are the same.

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