A method for rapidly processing slab breaks in a walking beam furnace

Abstract

This invention relates to a method for rapidly handling slab breakage in a walking beam furnace. The method includes the following steps: ① preparing a new cold billet and feeding it to the furnace door of the walking beam furnace via a feeding roller conveyor; ② receiving the cold billet with a charging machine, centering the new cold billet, and feeding it into the walking beam furnace, gradually raising the end of the charging machine near the cold billet during the feeding process; ③ slowly lowering the cold billet onto the broken slab, using the weight of the cold billet to press the two broken slab pieces tightly against the lower surface of the cold billet; ④ activating the moving beam inside the walking beam furnace to lift the broken slab and the cold billet together and slowly feed them in the reverse direction to the furnace door; ⑤ the charging machine extracting the broken slab and the cold billet from the walking beam furnace. The method of this invention can simply and quickly handle slab breakage accidents in the furnace, improving the efficiency of accident handling, and can also greatly reduce the risk of the broken billet falling from the walking beam of the furnace.

Description

Technical Field

[0001] This invention relates to the field of hot-rolled thick plates in the metallurgical industry, and in particular to a method for rapidly treating slab fractures in a walking beam furnace. Background Technology

[0002] The process of slabs being centered from the feeding roller conveyor and then conveyed into the walking beam furnace is mainly accomplished by the charging machine in front of the furnace. Most of the slabs delivered to the furnace from the outside are cold slabs. During the charging process, if the charging speed is too fast or if there is uneven composition within the slab, the slab is prone to breakage when it falls from the charging machine onto the stationary beam inside the furnace. Although the probability of this happening is low, it is relatively troublesome to handle once it occurs. The commonly used solution is to gradually move the broken slab towards the furnace door using the moving beam inside the furnace, and then pull it out using the charging machine or wire mesh. However, this method has significant limitations and is time-consuming. A slight mistake can easily cause the broken slab to fall from the walking beam to the furnace bottom, further escalating the accident. Currently, there is no effective solution for handling such accidents. Summary of the Invention

[0003] The purpose of this invention is to provide a method for quickly handling slab breakage in a walking beam furnace, which is a newly designed method that not only improves the efficiency of handling accidents but also greatly reduces the risk of the broken slab falling off the walking beam of the furnace.

[0004] The specific solution of the present invention is: a method for rapidly treating slab fractures in a walking beam furnace, the method comprising the following steps:

[0005] ① Prepare a new cold billet and send it to the furnace door of the walking beam furnace by the feeding roller conveyor;

[0006] ② The steel loading machine receives the cold billet and centers the new cold billet before sending it into the walking beam furnace. During the billet feeding process, the end of the steel loading machine near the cold billet is gradually raised so that the position of the cold billet is higher than the position of the broken slab and is sent directly above the broken slab.

[0007] ③ Slowly lower the cold billet onto the broken slab, aligning the four corners of the cold billet with the four corners of the broken slab. Use the weight of the cold billet itself to press the two broken slabs tightly against the lower surface of the cold billet.

[0008] ④ Start the moving beam inside the walking beam furnace to lift the broken slab together with the cold billet and slowly send it in reverse to the furnace door;

[0009] ⑤ The broken slabs and cold billets are extracted from the walking beam furnace by the steel loading machine.

[0010] Furthermore, in step ① of this invention, the shape of the cold blank is generally the same as the shape of the fractured slab, and the area of ​​the cold blank is greater than or equal to the overall area of ​​the fractured slab.

[0011] Furthermore, the specific process of slowly placing the cold billet onto the fractured slab in step ③ of this invention is as follows:

[0012] S1. Raise the two moving beams inside the walking beam furnace to the same height as the fixed beam;

[0013] S2. The loading machine first lowers the front 1 / 5 to 1 / 4 of the cold billet onto the broken slab. The loading machine then reverses and lifts the cold billet forward again, conveying it 1 / 5 to 1 / 4 of the distance. This process is repeated 4 to 5 times until the entire cold billet is placed on the broken slab.

[0014] Furthermore, the weight of the cold blank in this invention is 3 / 4 to 3 / 2 of the weight of the fractured slab.

[0015] The present invention provides a solution specifically designed to efficiently and safely extract a broken slab after it breaks inside a walking beam furnace. This method can quickly and easily handle accidents where slabs break inside the furnace, improving the efficiency of accident handling, and can also greatly reduce the risk of the broken slab falling off the walking beam of the furnace. It has great practical application and promotion value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the uppermost state of the steel loading machine used in the method of the present invention;

[0017] Figure 2 This is a schematic diagram of the lowest position of the steel loading machine used in the method of the present invention;

[0018] Figure 3 This is a schematic diagram of the uppermost loading state of the steel loading machine used in the method of the present invention;

[0019] Figure 4 This is a schematic diagram of the lowest loading state of the steel loading machine used in the method of the present invention;

[0020] Figure 5 This is a top-view schematic diagram of the steel loading machine used in the method of this invention;

[0021] Figure 6 This is a schematic diagram of the initial state of the fractured slab in the method of the present invention;

[0022] Figure 7 This is a schematic diagram of the state in which the cold billet is pressed onto the fractured slab in the method of the present invention.

[0023] In the diagram: 1—Steel loading machine, 2—Transfer slab, 3—Moving beam, 4—Fixed beam, 5—Broken slab, 6—Walking wheel furnace door, 7—Cold billet. Detailed Implementation

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] See Figure 6 , Figure 7 This invention provides a method for rapidly handling slab fractures within a walking beam furnace. When a fractured slab 5 appears in the walking beam furnace, the following steps are taken:

[0027] ① Prepare a new cold billet 7. The cold billet is usually a well-preserved steel billet that is not easily broken, which is then fed to the furnace door of the walking beam furnace by the feeding roller conveyor. Furthermore, the shape of the cold billet is generally the same as the shape of the broken slab, and the area of ​​the cold billet is greater than or equal to the overall area of ​​the broken slab. Furthermore, the weight of the cold billet in this invention is 3 / 4 to 3 / 2 of the weight of the broken slab.

[0028] ② The steel loading machine receives the cold billet and centers the new cold billet before sending it into the walking beam furnace. During the billet feeding process, the end of the steel loading machine near the cold billet is gradually raised so that the position of the cold billet is higher than the position of the broken slab and is sent directly above the broken slab.

[0029] ③ Slowly lower the cold billet onto the broken slab, aligning the four corners of the cold billet with the four corners of the broken slab. Use the weight of the cold billet itself to press the two broken slabs tightly against the lower surface of the cold billet.

[0030] ④ Start the moving beam 3 inside the walking beam furnace to lift the broken slab together with the cold billet and slowly send it in reverse to the furnace door 6 of the walking beam furnace.

[0031] ⑤ The broken slabs and cold billets are extracted from the walking beam furnace by the steel loading machine.

[0032] Furthermore, in this embodiment, step ③, the operation of slowly placing the cold billet onto the fractured slab, specifically involves:

[0033] S1. Raise the two moving beams 3 inside the walking beam furnace to the same height as the fixed beam 4. This will ensure that the broken slab remains on the same horizontal plane even though it is broken, which will help keep the subsequent cold billets stable when placed on it.

[0034] S2. The loading machine first lowers the front 1 / 5 to 1 / 4 of the cold billet onto the broken slab. The loading machine then reverses and lifts the cold billet forward again, conveying it forward another 1 / 5 to 1 / 4 of the distance. This process is repeated 4 to 5 times until the entire cold billet is placed on the broken slab. The distance traveled each time depends on the site conditions and is also related to the operator's experience.

[0035] The above method basically explains the entire processing procedure. The steel loading machine 1 used in this embodiment is similar to existing technology, and its structure can be found in [reference needed]. Figures 1-5 As shown, it includes a crossbeam arm, a lifting mechanism, and a lateral movement mechanism, all of which are very mature mechanical equipment. When using the steel loading machine, it is tilted at a slight angle to facilitate the unloading and placement of the slabs transferred above.

[0036] The present invention provides a solution specifically designed to efficiently and safely extract a broken slab after it breaks inside a walking beam furnace. This method can quickly and easily handle accidents where slabs break inside the furnace, improving the efficiency of accident handling, and can also greatly reduce the risk of the broken slab falling off the walking beam of the furnace. It has great practical application and promotion value.

Claims

1. A method for rapidly treating slab fractures in a walking beam furnace, characterized in that, The method includes the following steps: ① Prepare a new cold billet and send it to the furnace door of the walking beam furnace by the feeding roller conveyor; ② The steel loading machine receives the cold billet and centers the new cold billet before sending it into the walking beam furnace. During the billet feeding process, the end of the steel loading machine near the cold billet is gradually raised so that the position of the cold billet is higher than the position of the broken slab and is sent directly above the broken slab. ③ Slowly lower the cold billet onto the broken slab, aligning the four corners of the cold billet with the four corners of the broken slab. Use the weight of the cold billet itself to press the two broken slabs tightly against the lower surface of the cold billet. ④ Start the moving beam inside the walking beam furnace to lift the broken slab together with the cold billet and slowly send it in reverse to the furnace door; ⑤ The broken slabs and cold billets are extracted from the walking beam furnace by the steel loading machine.

2. The method for rapidly treating slab fractures in a walking beam furnace according to claim 1, characterized in that: In step ①, the shape of the cold billet is the same as the shape of the fractured slab, and the area of ​​the cold billet is greater than or equal to the total area of ​​the fractured slab.

3. The method for rapidly treating slab fractures in a walking beam furnace according to claim 1, characterized in that: The specific process of slowly placing the cold billet onto the fractured slab in step ③ is as follows: S1. Raise the two moving beams inside the walking beam furnace to the same height as the fixed beam; S2. The loading machine first lowers the front 1 / 5 to 1 / 4 of the cold billet onto the broken slab. The loading machine then reverses and lifts the cold billet forward again, conveying it 1 / 5 to 1 / 4 of the distance. This process is repeated 4 to 5 times until the entire cold billet is placed on the broken slab.

4. The method for rapidly treating slab fractures in a walking beam furnace according to claim 1, characterized in that: The weight of the cold blank is 3 / 4 to 3 / 2 of the weight of the fractured slab.

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