A method for preventing flat slabs from occurring in thin slab continuous casting machines

Abstract

The present application provides a method for thin slab continuous casting machine to avoid flat billets, which relates to the field of metallurgical technology and includes the following steps: step one: observe the relative position of the consumables and the ingot stripping device; step two: if the consumables have not passed through the ingot stripping device; manually start the ingot stripping device to disengage the ingot rod from the consumables; step three: if the consumables have passed through the ingot stripping device, stop casting immediately; step four: open the crystallizer; step five: reverse start the straightening machine and lower the ingot stripping device at the same time; step six: manually start the ingot stripping device to disengage the ingot stripping rod from the consumables; step seven: use a winch to recover the ingot stripping rod; step eight: forward start the straightening machine to quickly pull the billet in the fan-shaped segment out of the crystallizer. By adopting the method provided by the present application, the ingot stripping device can be used to disengage the ingot stripping rod from the consumables, shorten the processing time, ensure the operating rate, avoid or reduce the situation of manual cutting of billets, reduce the burden on operators, and improve the safety factor.

Description

Technical Field

[0001] The present application relates to the field of metallurgical technology, and in particular to a method for preventing flat slabs from being cast in a thin slab continuous casting machine. Background Art

[0002] In continuous casting equipment, the ingot guide device plays an important role. Before pouring, the consumable parts at the upper end of the ingot guide are extended into the crystallizer to block the lower part of the crystallizer as the movable bottom of the crystallizer; after pouring, as the molten steel solidifies, the end of the billet and the consumable parts are condensed into one, and the ingot guide rod serves as a billet pulling transmission component to continuously pull the billet out of the crystallizer; after the consumable parts connected to the ingot guide rod pass through the last horizontal section, the ingot stripping device quickly disconnects the ingot guide head and the consumable parts that are condensed into one with the billet, and the ingot guide rod is transported to the ingot guide storage device for storage and use in the next casting. In the thin slab continuous casting production, sometimes due to tracking problems, equipment problems or operational reasons, the casting machine fails to remove the ingot guide and stops production.

[0003] At this time, the machine must be stopped to remove the consumable bolts, disconnect the dummy rod from the consumables, and then pull out the billet in the fan-shaped section of the casting machine. The billet in the fan-shaped section has a long waiting time, low billet temperature, and large straightening stress, which will have a serious impact on the life of the fan-shaped section and the accuracy of the roll gap, and then cause large liquid level fluctuations during production, slag roll degradation and other consequences. In severe cases, it will cause steel leakage accidents, increase equipment maintenance costs, and affect production stability. If the billet is processed as a horizontal billet, the processing time will be long, affecting the operating rate, affecting the balance of steel, and affecting the company's production. Summary of the invention

[0004] The object of the present invention is to provide a method for preventing flat billets in a thin slab continuous casting machine, which has the beneficial effects of reducing damage to equipment caused by pulling out low-temperature billets, effectively reducing equipment maintenance costs, reducing accident losses, ensuring operating rates, increasing the service life of fan-shaped segment billets, ensuring roll gap accuracy, avoiding flat billet handling, reducing the labor cost of accident handling, alleviating the burden on operators, and improving the safety factor, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for preventing flat slabs in a thin slab continuous casting machine, comprising:

[0007] A crystallizer, in which the casting billet is placed;

[0008] A driving roller, which is arranged below the crystallizer and drives the casting;

[0009] Consumable parts;

[0010] A dummy bar, on which the consumable parts are arranged;

[0011] The dummy ingot removal device is arranged below the dummy bar and is used to lift the dummy bar and separate the dummy bar from the consumable parts;

[0012] The method for preventing flat slabs in a thin slab continuous casting machine comprises the following steps:

[0013] Step 1: Observe the relative position of the consumables and the ingot stripping device;

[0014] Step 2: If the consumables do not pass through the de-ingot device, reduce the casting machine casting speed to 0.3m / min; manually start the de-ingot device to disconnect the ingot rod from the consumables;

[0015] Step 3: If the consumable parts have passed the ingot removal device, stop pouring immediately, open the roller gaps of sections 0, 1, and 2 to the thickness of the crystallizer outlet, and make the liquid core of the tail billet fall back to the position below the entrance of section 0;

[0016] Step 4: Open the crystallizer;

[0017] Step 5: Start the straightening machine in reverse direction and lower the dummy bar recovery device at the same time, so that the ingot and the dummy bar move in the opposite direction until the consumable parts return to the front of the dummy bar removal device;

[0018] Step 6: Manually start the dummy rod removal device to disconnect the dummy rod from the consumable parts;

[0019] Step 7: Use the winch to recover the dummy bar;

[0020] Step 8: Start the straightening machine in the forward direction to quickly pull the ingot in the fan-shaped segment out of the crystallizer.

[0021] As a further solution of the present invention: in the step 1, the relative position of the consumables and the ingot removing device is observed to determine whether the consumables pass through the ingot removing device.

[0022] As a further solution of the present invention: in the step 2, the ingot removing device is manually started, the ingot removing device lifts up the ingot rod, and disconnects the ingot rod from the consumable part.

[0023] As a further solution of the present invention: in the step 4, the crystallizer is opened to prevent the billet shell from scratching the copper plate of the crystallizer.

[0024] As a further solution of the present invention: in the step six, the ingot removing device is manually started, the ingot removing device lifts up the ingot rod, and disconnects the ingot rod from the consumable part.

[0025] As a further solution of the present invention: in the step seven, a winch is used to recover the dummy rod to make room for pulling out the ingot.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. By adopting the method provided in the present application, it is not necessary to remove the bolts of the consumable parts. The dummy rod can be disconnected from the consumable parts through the dummy device, the processing time is shortened, the billet temperature is greater than 1000°C, and the billet straightening force is completely within the tolerable range of the fan-shaped segment, which reduces the damage to the equipment caused by pulling out the low-temperature billet, and effectively reduces the equipment maintenance cost;

[0028] 2. By adopting the method provided by this application, the accident handling time is shortened by 7 hours compared with the horizontal billet, and the machine preparation operation can be carried out after the billet is pulled out, which reduces the accident loss, ensures the operation rate, increases the service life of the fan-shaped segment billet, and ensures the accuracy of the roll gap;

[0029] 3. The method provided in this application is adopted to avoid flat billet processing and reduce the labor cost of accident handling;

[0030] 4. The method provided in this application can be used to avoid or reduce manual cutting of ingots, reduce the burden on operators, and improve the safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0032] In order to more completely understand the present application and its beneficial effects, the following description will be made in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0033] Figure 1 A schematic structural diagram of a method for avoiding flat slabs in a thin slab continuous casting machine provided in an embodiment of the present application.

[0034] Figure 2 for Figure 1 A partial enlarged view of middle A.

[0035] Figure 3 for Figure 1 A partial enlarged view of B.

[0036] Markings in the figure:

[0037] 1. Crystallizer; 2. Driving roller; 3. Ingot; 4. Consumable parts; 5. Dummy rod; 6. Dummy device. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0039] Please refer to the attached Figures 1 to 3 The embodiment of the present application provides a method for preventing flat slabs in a thin slab continuous casting machine, comprising:

[0040] A crystallizer 1, in which a casting billet 3 is arranged;

[0041] A driving roller 2, which is arranged below the crystallizer 1 and drives the casting slab 3;

[0042] Consumables 4;

[0043] A dummy bar 5, on which the consumable part 4 is arranged;

[0044] The dummy ingot removing device 6 is arranged below the dummy ingot rod 5 and is used to lift up the dummy ingot rod 5 and separate the dummy ingot rod 5 from the consumable part 4;

[0045] The method for avoiding flat slabs in a thin slab continuous casting machine comprises the following steps:

[0046] Step 1: Observe the relative position of the consumables 4 and the ingot stripping device 6;

[0047] Step 2: If the consumable part 4 does not pass through the de-ingot device 6, reduce the casting machine casting speed to 0.3 m / min; manually start the de-ingot device 6 to disconnect the ingot rod 5 from the consumable part 4;

[0048] Step 3: If the consumable part 4 has passed the ingot removal device 6, stop pouring immediately, open the roller gaps of sections 0, 1, and 2 to the thickness of the crystallizer 1 outlet, and make the liquid core of the tail billet fall back to the position below the entrance of section 0;

[0049] Step 4: Open the crystallizer 1;

[0050] Step 5: Start the straightening machine in reverse direction, and at the same time lower the dummy rod 5 recovery device, so that the ingot 3 and the dummy rod 5 move in the opposite direction until the consumable part 4 returns to the front of the dummy rod removal device 6;

[0051] Step 6: Manually start the dummy rod device 6 to disconnect the dummy rod 5 from the consumable part 4;

[0052] Step 7: Using a winch to recover the dummy rod 5;

[0053] Step 8: Start the straightening machine in the forward direction to quickly pull the ingot 3 in the sector out of the crystallizer 1.

[0054] By adopting the method provided in the present application, there is no need to remove the bolts of the consumable part 4. The ingot removal device 6 can be used to disconnect the ingot rod 5 from the consumable part 4, thereby shortening the processing time, and the temperature of the ingot 3 is greater than 1000°C. The straightening force of the ingot 3 is completely within the tolerable range of the sector segment, thereby reducing the damage to the equipment caused by pulling out the low-temperature ingot 3, and effectively reducing the equipment maintenance cost; by adopting the method provided in the present application, the accident handling time is shortened by 7 hours compared with the horizontal ingot, and the machine can be prepared after the ingot 3 is pulled out, thereby reducing accident losses, ensuring the operating rate, increasing the service life of the sector segment ingot 3, and ensuring the roller gap accuracy; by adopting the method provided in the present application, horizontal ingot handling is avoided, and the labor cost of accident handling is reduced; by adopting the method provided in the present application, manual cutting of the ingot 3 is avoided or reduced, the burden on operators is reduced, and the safety factor is improved.

[0055] In a preferred embodiment of the present invention, in step 1, the relative position of the consumable part 4 and the ingot removing device 6 is observed to determine whether the consumable part 4 passes through the ingot removing device 6, so as to determine a selected step;

[0056] In a preferred embodiment of the present invention, in step 2, the de-ingot device 6 is manually started, and the de-ingot device 6 lifts the ingot rod 5 to disengage the ingot rod 5 from the consumable part 4, without removing the bolts of the consumable part 4, thereby shortening the processing time.

[0057] In a preferred embodiment of the present invention, in step 4, the crystallizer 1 is opened to prevent the billet shell from scratching the copper plate in the crystallizer 1 and causing damage to the crystallizer 1.

[0058] In a preferred embodiment of the present invention, in step six, the de-ingot device 6 is manually started, and the de-ingot device 6 lifts the ingot rod 5 to disengage the ingot rod 5 from the consumable part 4, without removing the bolts of the consumable part 4, thereby shortening the processing time.

[0059] In a preferred embodiment of the present invention, in step seven, the dummy rod 5 is recovered by a winch to make room for the billet 3 to be pulled out. After the dummy rod 5 is recovered by the winch, room is made for the billet 3 to be pulled out of the crystallizer 1, so that the billet 3 can be pulled out of the crystallizer 1.

[0060] By adopting the method provided in the present application, there is no need to remove the bolts of the consumable part 4. The ingot removal device 6 can be used to disconnect the ingot rod 5 from the consumable part 4, thereby shortening the processing time, and the temperature of the ingot 3 is greater than 1000°C. The straightening force of the ingot 3 is completely within the tolerable range of the sector segment, thereby reducing the damage to the equipment caused by pulling out the low-temperature ingot 3, and effectively reducing the equipment maintenance cost; by adopting the method provided in the present application, the accident handling time is shortened by 7 hours compared with the horizontal ingot, and the machine can be prepared after the ingot 3 is pulled out, thereby reducing accident losses, ensuring the operating rate, increasing the service life of the sector segment ingot 3, and ensuring the roller gap accuracy; by adopting the method provided in the present application, horizontal ingot handling is avoided, and the labor cost of accident handling is reduced; by adopting the method provided in the present application, manual cutting of the ingot 3 is avoided or reduced, the burden on operators is reduced, and the safety factor is improved.

[0061] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0062] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0063] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for preventing flat slabs in a thin slab continuous casting machine, characterized in that: include: A crystallizer, in which the casting billet is placed; A driving roller, which is arranged below the crystallizer and drives the casting; Consumable parts; A dummy bar, on which the consumable parts are arranged; The dummy ingot removal device is arranged below the dummy bar and is used to lift the dummy bar and separate the dummy bar from the consumable parts; The method for preventing flat slabs in a thin slab continuous casting machine comprises the following steps: Step 1: Observe the relative position of the consumables and the ingot stripping device; Step 2: If the consumables do not pass through the de-ingot device, reduce the casting machine casting speed to 0.3m / min; manually start the de-ingot device to disconnect the ingot rod from the consumables; Step 3: If the consumable parts have passed the ingot removal device, stop pouring immediately, open the roller gaps of sections 0, 1, and 2 to the thickness of the crystallizer outlet, and make the liquid core of the tail billet fall back to the position below the entrance of section 0; Step 4: Open the crystallizer; Step 5: Start the straightening machine in reverse direction and lower the dummy bar recovery device at the same time, so that the ingot and the dummy bar move in the opposite direction until the consumable parts return to the front of the dummy bar removal device; Step 6: Manually start the dummy rod removal device to disconnect the dummy rod from the consumable parts; Step 7: Use the winch to recover the dummy bar; Step 8: Start the straightening machine in the forward direction to quickly pull the ingot in the fan-shaped segment out of the crystallizer.

2. A method for preventing flat slabs in a thin slab continuous casting machine according to claim 1, characterized in that: In the step 1, the relative position of the consumables and the ingot stripping device is observed to determine whether the consumables pass through the ingot stripping device.

3. A method for preventing flat slabs in a thin slab continuous casting machine according to claim 1, characterized in that: In the step 2, the ingot removing device is manually started, and the ingot removing device lifts up the ingot rod to separate the ingot rod from the consumable part.

4. A method for preventing flat slabs in a thin slab continuous casting machine according to claim 1, characterized in that: In the step 4, the crystallizer is opened to prevent the shell from scratching the copper plate of the crystallizer.

5. A method for preventing flat slabs in a thin slab continuous casting machine according to claim 1, characterized in that: In the step six, the ingot removing device is manually started, and the ingot removing device lifts up the ingot rod to separate the ingot rod from the consumable part.

6. A method for preventing flat slabs in a thin slab continuous casting machine according to claim 1, characterized in that: In the step seven, a winch is used to recover the dummy rod to make room for pulling out the ingot.

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