Digging bucket for slag removal in main channel of blast furnace

Abstract

The utility model discloses a kind of excavator bucket for blast furnace molten iron main ditch slag removal, including excavator original bucket and extension bucket, the excavator original bucket includes original bucket bottom plate and two original bucket side plates;The extension bucket includes flat bottom plate, two trapezoidal side plates and inclined end plate, the end of the extension bucket away from the inclined end plate is connecting end, the connecting end of the extension bucket is inserted into the excavator original bucket, the flat bottom plate of the extension bucket and the flat section of the original bucket bottom plate in the excavator original bucket are surface-to-surface adhering, the extension bucket and the excavator original bucket are welded solid.The utility model excavator bucket for blast furnace molten iron main ditch slag removal, by installing the extension bucket in the excavator original bucket, on the one hand, make the length of excavator bucket lengthen, can dig depth becomes deep, the slag in the excavator original bucket, especially bottom, can be cleaned more cleanly;On the other hand, make the capacity of excavator bucket larger, the amount of single digging increases, and cleaning efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the technical field of slag removal tools, and in particular to a bucket for slag removal in the main channel of blast furnace molten iron. Background Technology

[0002] After tapping iron from a blast furnace in the iron and steel metallurgical industry, all residual slag and iron in the main trough must be thoroughly cleaned before the next batch of iron is tapped. Otherwise, the residual slag and iron will cool and form crusts and nodules, reducing the effective volume of the main trough, leading to intensified scouring by the iron flow, abnormal corrosion of refractory materials, and even major safety accidents such as "iron runaway" and "splashing." Traditional manual trough cleaning requires multiple workers to take turns entering the main trough area, using steel chisels and pneumatic picks to break and remove slag. This method is extremely labor-intensive, takes a long time to clean a single trough, and carries multiple risks such as high-temperature burns, sudden collapse of red-hot slag, and gas poisoning, making it difficult to meet the high-efficiency, safe, and low-consumption production requirements of modern blast furnaces.

[0003] To address this, major steel companies have successively developed the use of small excavators to replace manual labor. However, practical applications have shown that while mechanized operations reduce the number of workers required, the main molten iron trenches are generally narrow and deep U-shaped, with the trench bottom reaching a depth of up to 2 meters from the trench edge, and the trench lining is uneven. Furthermore, the buckets of existing excavators, which come standard with them, have a depth of less than 500mm, creating a contradiction of "not being able to reach the depths." During operation, the bucket cannot reach the bottom in one go, requiring repeated digging, lifting, and rotation, which prolongs the trench cleaning time and affects the smooth operation of the blast furnace. Incomplete removal of slag and iron results in a large amount of residue, requiring subsequent manual secondary processing. Frequent collisions between the bucket and the main trench exacerbate wear on the bucket teeth and the refractory material of the main trench, leading to high maintenance costs. Accumulation of red slag and iron in the dead corners of the deep trench poses a safety hazard of sudden collapse and injury. Utility Model Content

[0004] The purpose of this utility model is to provide a slag-removing bucket for the main channel of blast furnace molten iron.

[0005] The technical solution to achieve the purpose of this utility model is: a bucket for cleaning slag in the main trough of blast furnace molten iron, comprising an excavator's original bucket and an extension bucket. The original bucket includes an original bucket bottom plate and two original bucket side plates. The two original bucket side plates are parallel and located on both sides of the original bucket bottom plate. The bottom edges of the two original bucket side plates are connected to the original bucket bottom plate to form a bucket chamber. One end of the original bucket bottom plate is the rear end and the other end is the front end. A hinge part for connecting to the excavator is provided on the rear end of the original bucket bottom plate. The original bucket bottom plate has a planar section, the edge of which originates from the front end. The extension bucket includes a flat bottom plate, two trapezoidal side plates, and an inclined end plate. The upper side length of the trapezoidal side plates is greater than... The two trapezoidal side plates are located on both sides of the flat bottom plate, and the bottom edges of the two trapezoidal side plates are each connected to the flat bottom plate. The inclined end plate is located between the two trapezoidal side plates, and the two sides of the inclined end plate are connected to the two trapezoidal side plates one-to-one. The lower edge of the inclined end plate near the flat bottom plate is connected to the flat bottom plate. The included angle between the flat bottom plate and the inclined end plate is an obtuse angle. The end of the extension bucket away from the inclined end plate is the connecting end. The connecting end of the extension bucket extends into the original bucket of the excavator. The flat bottom plate of the extension bucket is in contact with the plane section of the bottom plate of the original bucket in the original bucket of the excavator. The extension bucket is welded to the original bucket of the excavator.

[0006] Furthermore, the outer width of the extended bucket is consistent with the inner width of the original excavator bucket. The original excavator bucket, used for slag removal in the blast furnace main trough, ensures thorough cleaning of the slag on both sides of the blast furnace main trough. The width of the original excavator bucket is typically consistent with the width of the blast furnace main trough. However, when the outer width of the extended bucket is consistent with the inner width of the original excavator bucket, it maximizes the outer width of the extended bucket, allowing it to clean closer to the sides of the blast furnace main trough more effectively. Furthermore, the outer surface of the extended bucket fits snugly against the inner surface of the original excavator bucket, reinforcing the sides of the original excavator bucket and increasing its structural strength. This prevents deformation upon impact with the inner wall of the blast furnace main trough. Additionally, the absence of gaps between the outer surface of the extended bucket and the inner surface of the original excavator bucket prevents slag jamming and leakage during operation.

[0007] Furthermore, a crossbar is provided inside the original excavator bucket. The crossbar is located above the extension bucket and contacts the trapezoidal side plate. Both ends of the crossbar are fixed to the two original bucket side plates respectively. The crossbar serves two purposes: firstly, it secures the two original bucket side plates, preventing inward deformation of the original excavator bucket; secondly, given the extended bucket's length, the connecting end experiences significant leverage under stress. The crossbar limits and fixes the trapezoidal side plate downwards, resisting the leverage force on the connecting end of the extended bucket during operation, thus ensuring a more secure connection between the extended bucket and the original excavator bucket.

[0008] Furthermore, the original bucket of the excavator is provided with two longitudinal rods inside the bucket chamber. These two longitudinal rods are located at the top of the two trapezoidal side plates, respectively. The bottom of each longitudinal rod is welded to the top of the corresponding trapezoidal side plate, and the outer surface of each longitudinal rod is welded to the inner surface of the corresponding original bucket side plate. The arrangement of these longitudinal rods increases the welding surface area between the extension bucket and the original excavator bucket, while the flexible placement of the longitudinal rods also makes the welding operation more convenient.

[0009] Furthermore, the included angle between the flat bottom plate and the inclined end plate is 120°~140°. If the included angle between the flat bottom plate and the inclined end plate is too small, the included angle between the inclined end plate and the trapezoidal side plate is large, resulting in a relatively blunt downward digging action and relatively poor downward digging ability. If the included angle between the flat bottom plate and the inclined end plate is too large, the included angle between the inclined end plate and the trapezoidal side plate is small, and during the movement after digging, the slag in the extended bucket is prone to leaking out from the inclined end plate, causing slag to spill along the movement path.

[0010] Furthermore, along the length direction parallel to the flat bottom plate, the total length of the excavator's original bucket and the extended bucket is 1.4m to 1.6m. The depth of the existing blast furnace molten iron main trough is typically 800mm to 2m. Excluding the thickness of the lining of the blast furnace molten iron main trough, setting the total length of the excavator's original bucket and the extended bucket to 1.4m to 1.6m can satisfy the slag removal operation of blast furnace molten iron main troughs of various depths.

[0011] This utility model relates to a bucket for cleaning slag in the main blast furnace molten iron channel. By installing an extended bucket inside the original bucket of the excavator, the length of the bucket is increased, allowing for deeper digging. When cleaning narrow and deep blast furnace molten iron channels, the bucket can reach deep into the channel, effectively removing slag from the original bucket, especially at the bottom. Furthermore, the increased bucket capacity allows for greater single-pass scooping, resulting in higher cleaning efficiency, fewer digging passes, and a lower frequency of collisions between the bucket and the refractory material in the blast furnace molten iron channel. This significantly reduces wear on the refractory material caused by bucket collisions, extending its service life.

[0012] This utility model relates to a slag-cleaning bucket for the main blast furnace hot metal channel. The extended bucket includes a flat bottom plate, two trapezoidal side plates, and an inclined end plate. The flat bottom plate of the extended bucket is a flat plate, and the overall shape of the extended bucket is elongated, forming a "straight bucket." During the vertical downward digging process of the "straight bucket," the force direction of the extended bucket coincides more closely with the length direction of the extended bucket. The force component perpendicular to the length direction of the extended bucket, i.e., the shear force, is smaller. The extended bucket is less prone to deformation and can withstand greater downward pressure. At the same time, the force transmission efficiency of the extended bucket is also higher. When inserted downward for digging, the extended bucket can more easily penetrate into the deep slag, making digging easier. Furthermore, the trapezoidal structure of the trapezoidal side plate, combined with the inclined end plate, allows the extended bucket to form an enclosed structure, preventing the slag excavated from the bucket from spilling during removal, resulting in cleaner and more efficient operation. On the other hand, it allows the angle between the flat bottom plate and the inclined end plate to be obtuse, while the angle between the inclined end plate and the trapezoidal side plate is acute, forming a sharp point between the inclined end plate and the trapezoidal side plate. This sharp point makes it easier to penetrate the slag when digging downwards, making the excavation operation easier and more efficient. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the blast furnace tuyeres large sleeve disassembly device of this utility model; Figure 2 This is a top view schematic diagram of the blast furnace tuyeres large sleeve disassembly device of this utility model; Figure 3 This is a schematic diagram of the assembly structure of the blast furnace tuyeres large sleeve disassembly device of this utility model; Figure 4 yes Figure 1 A schematic diagram of the cross-sectional structure along line AA. Detailed Implementation

[0014] The preferred embodiment of the blast furnace molten iron main trough slag removal bucket of this utility model will be described in detail below with reference to the accompanying drawings: like Figures 1 to 4As shown, a bucket for cleaning slag in the main trough of blast furnace molten iron includes an original bucket 1 and an extended bucket 2. The original bucket 1 includes an original bucket bottom plate 11 and two original bucket side plates 12. The two original bucket side plates 12 are parallel and located on both sides of the original bucket bottom plate 11. The bottom edges of the two original bucket side plates 12 are connected to the original bucket bottom plate 11 to form a bucket chamber 13. One end of the original bucket bottom plate 11 is a rear end 111 and the other end is a front end 112. The rear end 111 of the original bucket bottom plate 11 is provided with a hinge part 14 for connecting with the excavator. The original bucket bottom plate 11 has a flat section 110, which originates from the front end 112. The extended bucket 2 includes a flat bottom plate 21, two trapezoidal side plates 22 and an inclined end plate 23. The upper side length D1 of the trapezoidal side plate 22 is greater than the bottom side length. D2, the two trapezoidal side plates 22 are located on both sides of the flat bottom plate 21, and the bottom edges of the two trapezoidal side plates 22 are each connected to the flat bottom plate 21. The inclined end plate 23 is located between the two trapezoidal side plates 22, and the two sides of the inclined end plate 23 are connected to the two trapezoidal side plates 22 one by one. The lower edge of the inclined end plate 23 near the flat bottom plate 21 is connected to the flat bottom plate 21. The included angle α between the flat bottom plate 21 and the inclined end plate 23 is an obtuse angle. The end of the extension bucket 2 away from the inclined end plate 23 is the connecting end 24. The connecting end 24 of the extension bucket 2 extends into the original bucket 1 of the excavator. The flat bottom plate 21 of the extension bucket 2 is in contact with the plane section 110 of the bottom plate 11 of the original bucket in the original bucket of the excavator. The extension bucket 2 is welded to the original bucket 1 of the excavator.

[0015] This utility model relates to a bucket for cleaning slag in the main trough of blast furnace molten iron. The hinge part 14 of the original bucket 1 of the excavator is connected to the excavator. The original bucket 1 of the excavator, which is installed on the excavator but without the extension bucket 2, can independently complete the digging work. The extension bucket 2 includes a flat bottom plate 21, two trapezoidal side plates 22 and an inclined end plate 23. The flat bottom plate 21, the two trapezoidal side plates 22 and the inclined end plate 23 are connected and enclosed. The length direction of the flat bottom plate 21 in the extension bucket 2 is consistent with the length direction of the planar section 110 in the original bucket 1 of the excavator. After the extension bucket 2 is fixedly installed in the original bucket 1 of the excavator, one end of the inclined end plate 23 serves as the front end of the new bucket.

[0016] This utility model relates to a slag-removing bucket for the main blast furnace molten iron channel. During excavation and cleaning, the excavator moves, causing the original bucket 1 and its extension bucket 2 to extend into the main blast furnace molten iron channel, excavating the slag in the main blast furnace molten iron channel and removing the excavated slag from the main blast furnace molten iron channel, thus realizing the slag removal operation of the main blast furnace molten iron channel.

[0017] This utility model relates to a bucket for cleaning slag in the main blast furnace molten iron channel. By installing an extension bucket 2 inside the original bucket 1 of the excavator, the length of the bucket is increased, allowing for deeper digging. When cleaning slag in narrow and deep blast furnace molten iron channels, the extension bucket can reach deep into the channel, enabling the removal of slag deep within the original bucket 1, especially at the bottom. Furthermore, the increased bucket capacity allows for greater single-digging capacity, higher cleaning efficiency, fewer digging operations, and reduced collision frequency between the bucket and the refractory material in the blast furnace molten iron channel. This significantly reduces wear on the refractory material caused by bucket collisions, extending its service life.

[0018] This utility model relates to a slag-cleaning bucket for the main trough of blast furnace molten iron. The extended bucket 2 includes a flat bottom plate 21, two trapezoidal side plates 22, and an inclined end plate 23. The flat bottom plate 21 of the extended bucket 2 is a flat plate, and the overall shape of the extended bucket 2 is elongated, forming a "straight bucket". During the vertical downward digging process of the "straight bucket" extended bucket 2, the force direction of the extended bucket 2 coincides with the length direction of the extended bucket 2 to a high degree. The force component perpendicular to the length direction of the extended bucket 2, i.e., the shear force, is small. The extended bucket 2 is not easily deformed and can withstand greater downward pressure. At the same time, the force transmission efficiency of the extended bucket 2 is also higher. When inserted downward for digging, the extended bucket 2 can more easily enter the deep slag, making digging easier. Furthermore, the trapezoidal structure of the trapezoidal side plate 22, combined with the inclined end plate 23, allows the extended bucket 2 to form an enclosed structure, preventing the slag excavated into the bucket from spilling during removal, making the operation cleaner and more efficient. On the other hand, it allows the included angle α between the flat bottom plate 21 and the inclined end plate 23 to be obtuse, while the included angle between the inclined end plate 23 and the trapezoidal side plate 22 is acute, forming a sharp point between the inclined end plate 23 and the trapezoidal side plate 22. This sharp point makes it easier to enter the slag when digging downwards, making the digging operation easier and more efficient.

[0019] In this utility model, the slag-cleaning bucket for the main blast furnace molten iron channel preferably has an outer width D3 of the extended bucket 2 that matches the inner width D4 of the original excavator bucket 1. The original excavator bucket 1, used for slag cleaning in the main blast furnace molten iron channel, allows for thorough cleaning of the slag on both sides of the channel. The width of the original excavator bucket 1 is typically consistent with the width of the main blast furnace molten iron channel. Based on this, when the outer width D3 of the extended bucket 2 is consistent with the inner width D4 of the original excavator bucket 1, on the one hand, the outer width D3 of the extended bucket 2 can be maximized, allowing the extended bucket 2 to be closer to both sides of the blast furnace molten iron main trough during cleaning, and the slag on both sides can be cleaned more thoroughly; on the other hand, the outer side of the extended bucket 2 fits into the inner side of the original excavator bucket 1, and the extended bucket 2 reinforces the side of the original excavator bucket 1, resulting in higher structural strength and less deformation when colliding with the inner wall of the blast furnace molten iron main trough. In addition, there is no gap between the outer side of the extended bucket 2 and the inner side of the original excavator bucket 1, so there will be no slag jamming or leakage during operation.

[0020] In this utility model, a bucket for cleaning slag in the main trough of blast furnace molten iron is preferably provided with a crossbar 3 inside the bucket chamber 13 of the original bucket 1. The crossbar 3 is located above the extension bucket 2 and contacts the trapezoidal side plate 22. The two ends of the crossbar 3 are respectively fixed to the two original bucket side plates 12 one-to-one. The crossbar 3 serves two purposes: firstly, it can secure the two original bucket side plates 12 of the original bucket 1, preventing the original bucket 1 from deforming inward; secondly, since the extension bucket 2 is relatively long, the connecting end 24 of the extension bucket 2 experiences a large leverage force after being stressed. The crossbar 3 can limit and fix the trapezoidal side plate 22 downward, resisting the leverage force on the connecting end 24 of the extension bucket 2 during operation, thus making the fixation between the extension bucket 2 and the original bucket 1 of the excavator more secure.

[0021] In this utility model, a bucket for cleaning slag in the main trough of blast furnace molten iron is preferably provided with two longitudinal rods 4 inside the bucket chamber 13 of the original bucket 1 of the excavator. The two longitudinal rods 4 are respectively located at the top of the two trapezoidal side plates 22. The bottom of each longitudinal rod 4 is welded to the top of the corresponding trapezoidal side plate 22, and the outer side of each longitudinal rod 4 is welded to the inner surface of the corresponding original bucket side plate 12. The arrangement of the longitudinal rods 4 can increase the welding surface between the extended bucket 2 and the original bucket 1 of the excavator, and the flexible arrangement of the longitudinal rods 4 can also make the welding operation more convenient.

[0022] In this utility model, the slag-cleaning bucket for the main blast furnace molten iron channel preferably has an included angle α between the flat bottom plate 21 and the inclined end plate 23 of 120°~140°. If the included angle α between the flat bottom plate 21 and the inclined end plate 23 is too small, the included angle between the inclined end plate 23 and the trapezoidal side plate 22 is large, resulting in a relatively blunt downward digging action and relatively poor downward digging ability. If the included angle α between the flat bottom plate 21 and the inclined end plate 23 is too large, the included angle between the inclined end plate 23 and the trapezoidal side plate 22 is small, and during the movement after digging, slag in the extended bucket 2 is prone to leaking out from the inclined end plate 23, causing slag spillage along the movement path.

[0023] The slag-cleaning bucket for the main blast furnace molten iron channel of this utility model preferably has a total length D5 of 1.4m to 1.6m along the length direction parallel to the flat bottom plate 21, where the original bucket 1 and the extended bucket 2 are both slag-cleaning buckets. The depth of existing blast furnace molten iron channels is typically 800mm to 2m. By setting the total length D5 of the original bucket 1 and the extended bucket 2 to 1.4m to 1.6m, excluding the thickness of the blast furnace molten iron channel lining, slag-cleaning operations for blast furnace molten iron channels of various depths can be achieved.

[0024] For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the protection scope of this utility model.

Claims

1. A bucket for cleaning slag from the main trough of blast furnace molten iron, characterized in that: The excavator includes a base bucket and an extension bucket. The base bucket comprises a base plate and two side plates, which are parallel and located on opposite sides of the base plate. The bottom edges of the side plates connect to the base plate to form a bucket chamber. The base plate has a rear end and a front end. A hinge for connection to the excavator is located at the rear end of the base plate. The base plate has a planar section originating from the front end. The extension bucket comprises a flat bottom plate, two trapezoidal side plates, and an inclined end plate. The upper side of the trapezoidal side plates is longer than the lower side. The two trapezoidal side plates are located on opposite sides of the base plate. On both sides of the flat bottom plate, the bottom edges of the two trapezoidal side plates are each connected to the flat bottom plate. The inclined end plate is located between the two trapezoidal side plates, and the two sides of the inclined end plate are connected to the two trapezoidal side plates one-to-one. The lower edge of the inclined end plate near the flat bottom plate is connected to the flat bottom plate. The included angle between the flat bottom plate and the inclined end plate is an obtuse angle. The end of the extension bucket away from the inclined end plate is the connecting end. The connecting end of the extension bucket extends into the original bucket of the excavator. The flat bottom plate of the extension bucket is in contact with the plane section of the bottom plate of the original bucket in the original bucket of the excavator. The extension bucket is welded to the original bucket of the excavator.

2. The bucket for slag removal from the main blast furnace molten iron channel according to claim 1, characterized in that: The outer width of the extended bucket is consistent with the inner width of the original bucket of the excavator.

3. The bucket for slag removal from the main blast furnace molten iron channel according to claim 1, characterized in that: The original bucket of the excavator is provided with a crossbar inside the bucket chamber. The crossbar is located above the extended bucket and contacts the trapezoidal side plate. The two ends of the crossbar are respectively fixed to the two original bucket side plates.

4. The bucket for slag removal from the main blast furnace molten iron channel according to claim 1, characterized in that: The excavator's original bucket is provided with two longitudinal rods inside the bucket chamber. The two longitudinal rods are respectively located at the top of the two trapezoidal side plates. The bottom of each longitudinal rod is welded to the top of the corresponding trapezoidal side plate, and the outer side of each longitudinal rod is welded to the inner surface of the corresponding original bucket side plate.

5. The bucket for slag removal from the main blast furnace molten iron channel according to claim 1, characterized in that: The included angle between the flat bottom plate and the inclined end plate is 120°~140°.

6. The bucket for slag removal from the main blast furnace hot metal trough according to claim 1, characterized in that: Along the length direction parallel to the flat bottom plate, the total length of the excavator's original bucket and the extended bucket is 1.4m to 1.6m.

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