Wear-resistant blast furnace distribution chute

Abstract

The utility model relates to a wear-resistant blast furnace distribution chute, and belongs to the technical field of blast furnace equipment technical transformation in the metallurgical industry. According to the technical scheme, a material facing lining plate (3) is arranged on the inner side of the front portion of a gooseneck boom body (1), and the rear portion of the gooseneck boom body is fixedly connected with a base body (2); a plurality of protective plates (5) are symmetrically arranged on the inner walls of the two sides of the protective shell (10), the protective plates are perpendicular to the protective shell, cross beam receiving plates (6) are arranged between every two adjacent protective plates on the same inner wall, the multiple cross beam receiving plates are obliquely arranged at the bottom of the protective shell and connected through reinforcing plates (7), and the reinforcing plates are welded to the material facing lining plates; a lower guide plate (4) is horizontally arranged at the lower part of the U-shaped groove body (11); and wear-resistant layers are arranged on the surfaces of the material facing lining plate, the protective shell, the protective plate, the cross beam material receiving plate (6), the reinforcing plate (7), the U-shaped groove body (11) and the lower material guide plate (4). The material distribution chute has the advantages that the service life of the material distribution chute is prolonged, and the maintenance and replacement cost of equipment is reduced.

Description

Technical Field

[0001] The utility model relates to a wear-resistant blast furnace distribution chute, belonging to the technical field of technical transformation of blast furnace equipment in the metallurgical industry. Background Art

[0002] The charging chute is a crucial component of the bellless blast furnace's top equipment and a crucial piece of equipment for charging operations. Its function is to optimally distribute coke, pellets, sinter, other ores, and additives into the blast furnace, playing a vital role in its stable operation. In an ironworks, the charging chute's loading process is as follows: The charge is delivered to the furnace top by the main charging conveyor, then fed from a fixed receiving hopper through a charging gate into a weighing tank. After being regulated by a discharge regulating valve, the charge is fed into the blast furnace through a distributor, a central pipe, and the charging chute according to the blast furnace process requirements. Because the charging chute is located at the top of the blast furnace, the furnace temperature ranges from 300°C to 400°C. Current blast furnace production requirements for the top of the furnace are: a constant temperature of 150°C to 350°C during normal operation. In the event of a blast furnace accident, the temperature can reach 500°C to 600°C, no more than five times a year, each time for no more than 10 minutes. In fact, blast furnace operations are mainly based on developing central airflow, which causes the distribution chute to be heated too high. Excessive chute temperature will aggravate the wear and erosion of the material, causing the distribution chute to be easily deformed and worn. The chute equipment not only fails to meet the current blast furnace process production requirements, but also increases the cost of equipment maintenance and replacement, so it needs to be optimized and improved. Utility Model Content

[0003] The utility model aims to provide a wear-resistant blast furnace distribution chute, which prolongs the service life of the distribution chute, reduces the cost of equipment maintenance and replacement, and solves the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] A wear-resistant blast furnace charging chute comprises a goose head body and a base body, both of which are trough-shaped structures, a material receiving lining is provided on the inner side of the front of the goose head body, and the rear of the goose head body is fixedly connected to the base body; a protective device and a material guiding device are respectively provided on the inner sides of the front and rear of the base body, the protective device comprises a protective shell, a guard plate, a crossbeam receiving plate and a reinforcement plate, a plurality of guard plates are symmetrically provided on the inner walls of both sides of the protective shell, the guard plates are arranged vertically to the protective shell, a crossbeam receiving plate is provided between two adjacent guard plates on the same inner wall, a plurality of crossbeam receiving plates are obliquely provided at the bottom of the protective shell, and are connected by a reinforcement plate, and the reinforcement plate is welded to the material receiving lining plate; the material guiding device comprises a U-shaped trough body and a lower material guiding plate, and the lower material guiding plate is horizontally provided at the lower part of the U-shaped trough body; the protective shell and the U-shaped trough body are respectively provided on the inner sides of the front and rear of the base body, and are arranged closely, and the surfaces of the material receiving lining plate, protective shell, guard plate, crossbeam receiving plate, reinforcement plate, U-shaped trough body and lower material guiding plate are all provided with a wear-resistant layer.

[0006] The wear-resistant layer is made of alloy welding wire.

[0007] The two ends of the material receiving lining plate are arranged horizontally, and the middle part is a concave arc structure.

[0008] The front end of the base is arranged on the inner side of the rear part of the goose head body and is fixedly connected to the rear part of the goose head body through bolts.

[0009] The protective shell and the U-shaped trough are both fixedly connected to the base through bolts.

[0010] The reinforcement plate is vertically arranged at the bottom of the protective shell.

[0011] This new design uses high-hardness, high-wear-resistant alloy welding wire and CO2 gas shielded welding to create an integral wear-resistant layer, creating a protective screen that resists wear and erosion. The thicker the wear-resistant layer, the greater its wear resistance, ensuring the entire surface is fully protected. This new design can extend the life of the chute by approximately 3 to 4 months.

[0012] The beneficial effects of the utility model are: prolonging the service life of the material distribution chute and reducing the cost of equipment maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the main view of the utility model;

[0014] Figure 2 This is a split structure diagram of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the protective device of the utility model;

[0016] In the figure: goose head body 1, base body 2, material receiving lining plate 3, lower material guide plate 4, guard plate 5, cross beam material receiving plate 6, reinforcement plate 7, protective device 8, material guiding device 9, protective shell 10, U-shaped trough body 11. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and through examples.

[0018] A wear-resistant blast furnace distribution chute, comprising a goose head body 1 and a base body 2, both of which are trough-shaped structures, a material receiving lining plate 3 is provided on the inner side of the front of the goose head body 1, and the rear of the goose head body 1 is fixedly connected to the base body 2; a protective device 8 and a material guiding device 9 are respectively provided on the inner sides of the front and rear of the base body 2, the protective device 8 comprises a protective shell 10, a guard plate 5, a crossbeam receiving plate 6 and a reinforcement plate 7, a plurality of guard plates 5 are symmetrically provided on the inner walls on both sides of the protective shell 10, the guard plates 5 are arranged vertically to the protective shell 10, and a guard plate 5 is provided between two adjacent guard plates 5 on the same inner wall. The crossbeam material receiving plate 6, multiple crossbeam material receiving plates 6 are obliquely arranged at the bottom of the protective shell and connected by a reinforcement plate 7, and the reinforcement plate 7 is welded to the material receiving lining plate 3; the material guiding device 9 includes a U-shaped trough body 11 and a lower material guiding plate 4, and the lower material guiding plate 4 is horizontally arranged at the lower part of the U-shaped trough body 11; the protective shell 10 and the U-shaped trough body 11 are respectively arranged on the front and rear inner sides of the base 2, and are arranged closely, and the surfaces of the material receiving lining plate 3, the protective shell 10, the guard plate 5, the crossbeam material receiving plate 6, the reinforcement plate 7, the U-shaped trough body 11 and the lower material guiding plate 4 are all provided with a wear-resistant layer.

[0019] The wear-resistant layer is made of alloy welding wire.

[0020] The two ends of the material receiving lining plate 3 are arranged horizontally, and the middle part is a concave arc structure.

[0021] The front end of the base body 2 is arranged on the inner side of the rear part of the goose head body 1 and is fixedly connected to the rear part of the goose head body 1 by bolts.

[0022] The protective shell 10 and the U-shaped trough 11 are both fixedly connected to the base 2 by bolts.

[0023] The reinforcement plate 7 is vertically arranged at the bottom of the protective shell.

[0024] During use, the charge falls onto the receiving lining plate 3, passes through the inclined beam receiving plate 6 and enters the area of ​​the lower guide plate 4, and is transported by the lower guide plate 4.

[0025] This new chute is built using high-hardness, high-wear-resistant alloy welding wire and CO2 gas shielded welding. The thicker the wear-resistant layer, the stronger its wear resistance, ensuring the entire surface is fully protected. This new chute can extend its service life by approximately 3 to 4 months.

[0026] The selection of welding materials is extremely important. It directly impacts the service life of the distribution chute after cladding and the overall cost of cladding. When selecting welding materials, consider the following: 1. High hardness: The higher the hardness of the welding material, the better the wear resistance of the distribution chute after cladding. 2. High temperature resistance: The welding material must exhibit excellent wear resistance at high temperatures (around 700°C). 3. Impact resistance: The welding material must possess a certain degree of impact resistance.

[0027] Before welding, thoroughly remove debris, oxides, and other impurities from the surface of the distribution chute, including the wear-resistant alloy layer to be overlaid, until the chute body is exposed. Use CO2 gas shielded welding with reverse DC polarity. Adjust the welding current, voltage, and speed, and begin overlaying the wear-resistant alloy YD-65 flux-cored wire. Apply one layer of 3mm thick overlay. Avoid welding in drafty conditions (if this is not possible, block the area during on-site welding) to prevent the alloy layer from cooling too quickly, which can cause cracks on the weld surface. Ensure that the subsequent weld pass fuses 1 / 2 to 2 / 3 of the previous pass, ensuring the wear-resistant alloy layer is at least 5mm thick. After welding, allow the weld to cool naturally to avoid rapid cooling caused by water or wind, which can cause cracks on the weld surface. Inspections should be conducted throughout the welding process, and any unsatisfactory areas should be repaired promptly to ensure the quality of the wear-resistant alloy layer. After welding, visually inspect the overlay surface to ensure there are no defects such as missing welds. Recommended welding parameters are: welding current 220-280A, welding voltage 25-30V, shielding gas pure carbon dioxide, shielding gas volume 10-15L / min, welding wire extension length 10 times the wire diameter (can be adjusted appropriately according to the on-site working environment), welding speed 300-400mm / min, welding gun tilt angle 70-80 degrees, and DC reverse current type.

[0028] The utility model performs integral surfacing welding on the wear-resistant layer to make it a wear-resistant and erosion-resistant protective net, thereby extending the service life of the material distribution chute and reducing costs.

Claims

1. A wear-resistant blast furnace distribution chute, characterized by: The invention comprises a goose head body (1) and a base body (2), both of which are trough-type structures. A material receiving lining plate (3) is provided on the inner side of the front of the goose head body (1), and the rear of the goose head body (1) is fixedly connected to the base body (2); a protective device (8) and a material guiding device (9) are provided on the inner sides of the front and rear of the base body (2), respectively. The protective device (8) comprises a protective shell (10), a guard plate (5), a crossbeam material receiving plate (6) and a reinforcement plate (7). A plurality of guard plates (5) are symmetrically provided on the inner walls of both sides of the protective shell (10), and the guard plates (5) are arranged vertically to the protective shell (10). A crossbeam material receiving plate is provided between two adjacent guard plates (5) on the same inner wall. (6), multiple crossbeam material receiving plates (6) are tiltedly arranged at the bottom of the protective shell and connected by a reinforcement plate (7), and the reinforcement plate (7) is welded to the material receiving lining plate (3); the material guiding device (9) includes a U-shaped trough (11) and a lower material guiding plate (4), and the lower material guiding plate (4) is horizontally arranged at the lower part of the U-shaped trough (11); the protective shell (10) and the U-shaped trough (11) are respectively arranged on the front and rear inner sides of the base (2), and are arranged closely together, and the surfaces of the material receiving lining plate (3), the protective shell (10), the guard plate (5), the crossbeam material receiving plate (6), the reinforcement plate (7), the U-shaped trough (11) and the lower material guiding plate (4) are all provided with a wear-resistant layer.

2. The wear-resistant blast furnace distribution chute according to claim 1, characterized in that: The wear-resistant layer is made of alloy welding wire.

3. A wear-resistant blast furnace distribution chute according to claim 1 or 2, characterized in that: The two ends of the material receiving lining plate (3) are arranged horizontally, and the middle part is a concave arc structure.

4. A wear-resistant blast furnace distribution chute according to claim 1 or 2, characterized in that: The front end of the base body (2) is arranged on the inner side of the rear part of the goose head body (1) and is fixedly connected to the rear part of the goose head body (1) via bolts.

5. The wear-resistant blast furnace distribution chute according to claim 1 or 2, characterized in that: The protective shell (10) and the U-shaped trough (11) are both fixedly connected to the base (2) via bolts.

6. A wear-resistant blast furnace distribution chute according to claim 1 or 2, characterized in that: The reinforcement plate (7) is vertically arranged at the bottom of the protective shell.

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