A method for rapid standby of a thin slab continuous casting machine

Abstract

This invention discloses a method for rapid preparation of a thin slab continuous casting machine, comprising: sequentially stacking consumable parts, steel plates, and shear plates and binding them with tape to form a consumable parts assembly; assembling iron sheets to form a cold material iron sheet assembly with the same dimensions as the wide face of the crystallizer; after the dummy bar is inserted into place, installing the entire consumable parts assembly on the head of the dummy bar, keeping it centered and tightening the bolts; after the consumable parts assembly is installed, placing asbestos strips on the two long sides of the consumable parts assembly and fixing them with tape; after fixing the asbestos strips, opening the crystallizer and pulling down the dummy bar, closing the crystallizer and clamping it to compact the asbestos strips between the wide face of the crystallizer and the consumable parts; after the asbestos strips are clamped and sealed, sealing the gap between the consumable parts and the narrow face of the crystallizer with asbestos, and stacking the combined cold material on top; after the cold material is placed on the narrow face of the crystallizer, sequentially stacking the cold material iron sheet assembly between the width of the crystallizer and the cooling claw of the consumable parts, preparing for subsequent casting.

Description

Technical Field

[0001] This invention relates to the field of continuous casting production line technology, and in particular to a method for rapid standby of a thin slab continuous casting machine. Background Technology

[0002] Output is a key indicator for continuous casting production lines, and improving the operating rate is an important means to increase production line output.

[0003] Currently, the preparation process for thin slab continuous casting machines involves a large amount of material, complicated procedures, and significant time consumption, which hinders the improvement of production line operating rates. Furthermore, the stacking of cold stock during preparation has weak points, making it prone to steel leakage accidents during initial casting. Summary of the Invention

[0004] Based on the above problems, this application provides a method for rapid standby of a thin slab continuous casting machine.

[0005] This application provides a method for rapid preparation of a thin slab continuous casting machine, comprising: sequentially stacking consumable parts, steel plates, and shear plates and binding them with tape to form a consumable parts assembly; assembling iron sheets to form a cold material iron sheet assembly with the same dimensions as the wide face of the crystallizer; after the dummy bar is inserted into place, installing the entire consumable parts assembly on the head of the dummy bar, keeping it centered and tightening the bolts; after the consumable parts assembly is installed, placing asbestos strips on the two long sides of the consumable parts assembly and fixing them with tape; after fixing the asbestos strips, opening the crystallizer and pulling down the dummy bar, closing the crystallizer and clamping it to compact the asbestos strips between the wide face of the crystallizer and the consumable parts; after the asbestos strips are clamped and sealed, sealing the gap between the consumable parts and the narrow face of the crystallizer with asbestos, and stacking the combined cold material on top; after the cold material is placed on the narrow face of the crystallizer, sequentially stacking the cold material iron sheet assembly between the width of the crystallizer and the cooling claw of the consumable parts, and then driving the tundish car to the crystallizer position to prepare for casting.

[0006] In some embodiments, the cold material sheet assembly includes multiple sets of iron sheets arranged in sequence. Each set of iron sheets includes three iron sheets stacked together and fixed with tape. In the cold material sheet assembly, there is a set of iron sheets belonging to the adjustable length group. The iron sheets in the adjustable length group have a partial overlap area with the two adjacent sets of iron sheets and are fixed with tape so that the overall length of the cold material sheet assembly is the same as the width of the crystallizer.

[0007] In some implementations, each sheet in the cold stock assembly is 200 mm long.

[0008] In some implementations, the combined cold material at the narrow face of the crystallizer includes four stacked iron plates for protection and an additional iron block placed on top of the four iron plates.

[0009] In some embodiments, the asbestos strip installed on the long side of the consumable assembly has a width consistent with the thickness of the consumable and a length 50 mm longer than the length of the consumable.

[0010] In some embodiments, after the asbestos strip is fixed to the long side of the consumable assembly, the slub plate in the consumable assembly is cut according to the actual situation, so that the slub plate is 10-20mm away from the narrow sides.

[0011] In some implementations, after compacting the asbestos strip between the wide side of the crystallizer and the consumable parts, the corner gap is measured to meet the requirements, and iron putty is applied to the corner of the crystallizer; after the cold material iron sheet assembly is stacked in sequence, small iron sheets are used to shield and protect the iron blocks at the narrow side of the crystallizer.

[0012] In some implementations, the radiation source is immediately shut off after the tail billet is poured out, and two people use a spare shovel and a high-pressure water gun to thoroughly clean the crystallizer. At the same time, they work with the main control unit to check the cooling water in the second circuit, while one person checks the sector section.

[0013] In some embodiments, the method for rapid preparation of a thin slab continuous casting machine also includes the following steps: thoroughly drying the copper plate and surrounding area of ​​the crystallizer with compressed air; one person using an angle grinder to clean and polish the copper plate of the crystallizer and check for cracks in the copper plate, while another person prepares the graphite emulsion according to the specified ratio; after confirming that the copper plate is correct, one person uses a roller brush to evenly apply the prepared graphite emulsion to the copper plate of the crystallizer, while another person moves the dummy bar to a distance of 1 meter from the crystallizer and waits; placing the crystallizer guard plate into the crystallizer and moving the dummy bar to the crystallizer position; checking that the position and signal of the dummy bar are normal, ensuring that the personnel in the secondary cooling chamber have exited, and confirming with the heating furnace station before performing the dummy bar insertion operation.

[0014] In some implementations, the ingot insertion operation is performed. After the ingot rod is fully inserted into the crystallizer, the ingot rod is driven to the waiting position while the crystallizer width is adjusted. The ingot rod is pulled to the bottom of the crystallizer and stopped. After the width adjustment is completed, the crystallizer parameters are measured using a crystallizer width measuring ruler and a taper meter. If the error exceeds the standard, the crystallizer is recalibrated until it meets the requirements. The ingot rod head is moved upward to 400mm above the crystallizer cover plate, the locking pin is inserted, and the crystallizer is closed. In this way, the ingot rod is inserted into place.

[0015] The beneficial effects of this application are as follows: It provides a method for rapid preparation of a thin slab continuous casting machine. First, the cold material to be used on the wide and narrow sides of the crystallizer is prepared, including sequentially stacking consumable parts, steel plates, and tie plates together with tape to form a consumable parts assembly. This includes assembling a cold material sheet assembly with the same dimensions as the wide side of the crystallizer; bolting the consumable parts assembly onto the head of the dummy bar; binding two asbestos strips to the two long sides of the consumable parts assembly; and using the clamping pressure of the crystallizer to secure the asbestos strips between the copper plate on the wide side of the crystallizer and the consumable parts. The strips are clamped to achieve a sealing effect; then, at the narrow section, asbestos is manually hammered in and stacked with combined cold material. The cold material iron sheet assembly is then sequentially stacked between the width of the crystallizer and the cooling claw of the consumable part, thus sealing the crystallizer and the ingot head. This method uses pre-prepared materials and quickly achieves sealing of the wide section through the clamping pressure of the crystallizer. It is simple and easy to operate, which can significantly shorten the standby time, thereby improving the production line operation rate and reducing the labor intensity of the operators. Through this method, the crystallizer and the ingot head are tightly sealed, avoiding the accident of steel spikes during casting. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0017] Figure 1 A schematic diagram of the consumable parts assembly in a method for rapid standby of a thin slab continuous casting machine provided in this application;

[0018] Figure 2 A schematic diagram of the structure of a single set of cold material sheet assembly in a method for rapid preparation of a thin slab continuous casting machine provided in this application;

[0019] Figure 3 This is a schematic diagram of the adjusting length group of the cold material sheet assembly in a method for rapid preparation of a thin slab continuous casting machine provided in this application.

[0020] Attached diagram labels: 100-Consumable parts assembly, 110-Consumable parts, 120-Steel plate, 130-Sheet plate, 140-Tape, 210-Single iron sheet, 220-Adjustable length assembly. Detailed Implementation

[0021] This embodiment discloses a method for rapid standby of a thin slab continuous casting machine to improve production line operating rate. The method mainly includes: formulating standard operating procedures for standby of the continuous casting machine and setting standard operating time for each step; designing and manufacturing special standby tools, such as standby shovels, high-pressure water guns, extended grinding tools, crystallizer width measuring rulers, standby consumable assembly racks, etc.; and optimizing equipment action sequence to reduce unnecessary waiting time.

[0022] Regarding the optimization of equipment operation timing, the main improvements include: optimizing the travel speed of the derrick trolley to reduce start-up waiting time; improving the derrick trolley travel button to free up one person for inspection during derrick trolley travel; optimizing the derrick trolley travel conditions so that the machine can be started immediately after the derrick is inserted into the crystallizer, reducing unnecessary waiting time; optimizing the condition where the crystallizer width cannot be adjusted when the derrick is in motion, allowing for simultaneous width adjustment during the downward pull of the derrick after insertion into the crystallizer, saving standby time; and optimizing the centering speed of the trolley from the trolley to the crystallizer position to improve centering efficiency and save preparation time.

[0023] One of the key aspects of this method is the sealing of the crystallizer and the ingot head.

[0024] First, check the spare tools to ensure they are in good working order. Then check that the consumables and steel plates used for the second casting meet the required dimensions.

[0025] Next, prepare the materials involved in sealing the wide and narrow sides of the crystallizer, including the pre-preparation of consumable parts assemblies and cold material sheet assemblies.

[0026] For information on consumable assembly 100, please refer to... Figure 1 Consumable parts 110, steel plates 120 and shear plates 130 are stacked in sequence and bound together with tape 140. Consumable parts have holes for bolts to pass through. The consumable parts are tightly connected to the spindle head by tightening the bolts.

[0027] Regarding the cold slug sheet assembly, it is designed according to the width of the crystallizer, and the overall length of the cold slug sheet assembly is the same as the width of the crystallizer. The cold slug sheet assembly adopts the form of assembled iron sheets. In some embodiments, three small sealing iron sheets are assembled together using paper tape. A single set of iron sheets is 210. Figure 2 The assembly shown consists of three stacked iron sheets secured with tape. Overall, the cold stock sheet assembly comprises multiple sets of iron sheets arranged sequentially. Within the cold stock sheet assembly, one set of iron sheets belongs to the adjustable length group, as shown in Figure 220. Figure 3 As shown, the iron sheet in the adjustable length group has a partially overlapping area with the two adjacent iron sheets and is fixed with tape. Specifically, the iron sheets of the two adjacent groups are cross-overlaid to adjust the combined length, so that the overall length of the cold material iron sheet assembly is the same as the width of the crystallizer.

[0028] In some implementations, the length of the small sealing iron sheet is limited to 200mm. The number of cold material iron sheet assemblies is determined according to the width of the crystallizer. With a cross-sectional dimension of 1285, four sets are used on one side. For the remaining length of 1285-4*200=485mm, three sets are used in a stacked assembly.

[0029] At this point, two asbestos strips for sealing are also prepared, with the width of the asbestos strips being consistent with the thickness of the consumable component. In some embodiments, the length of the asbestos strip is also specified to be 50 mm greater than the length of the consumable component.

[0030] At this time, cold materials for sealing the narrow side are also prepared, such as two small iron blocks and eight small iron plates. One small iron block and four small iron plates are used on the narrow side on one side.

[0031] Next, after stopping the casting of the tail billet, the radiation source was immediately shut off. Two people used a spare shovel and a high-pressure water gun to thoroughly clean the crystallizer. At the same time, they cooperated with the main control to check the secondary cooling water of circuits 1-11, while one person inspected the fan-shaped section. The use of a high-pressure water gun has the beneficial effects of good cleaning effect and high efficiency.

[0032] Next, compressed air is used to thoroughly dry the copper plate and surrounding area of ​​the crystallizer.

[0033] One person uses an angle grinder to clean and polish the copper plate of the crystallizer and check for cracks in the copper plate; another person mixes the graphite emulsion according to the ratio.

[0034] After confirming that the copper plate is correct, one person uses a roller brush to evenly apply the prepared graphite emulsion to the copper plate of the crystallizer; another person drives the traction rod to a distance of about 1 meter from the crystallizer and waits.

[0035] Place the crystallizer guard plate into the crystallizer and drive the derrick to the crystallizer position.

[0036] After checking that the position and signal of the traction rod are normal, and ensuring that the personnel in the secondary cooling chamber have exited, proceed with the traction operation after confirming with the heating furnace station.

[0037] After the derrick is fully inserted into the crystallizer, the derrick is moved to the waiting position, and the crystallizer width is adjusted at the same time.

[0038] The siphon rod is pulled to the bottom of the crystallizer and stopped. After the width adjustment is completed, the crystallizer parameters are measured using a crystallizer width measuring ruler and a taper meter. If the error exceeds the standard, the crystallizer is recalibrated until it meets the requirements.

[0039] Move the ingot rod head upwards to 400mm above the crystallizer cover plate, insert the locking pin, and close the crystallizer.

[0040] At this point, the ingot guide rod is inserted into place. The next step is to install the pre-assembled consumable parts assembly onto the ingot guide rod head, ensuring strict alignment. Tighten the bolts to ensure a tight connection between the consumable parts and the ingot guide rod head, and then cover the bolt heads with bolt caps.

[0041] Next, place the pre-prepared asbestos strips on opposite sides of the consumable component, specifically on the two long sides of the consumable component assembly, which correspond to the wide side of the crystallizer, and secure them with tape.

[0042] Cut the asbestos plate according to the actual situation, making it 10-20mm away from the narrow sides. Open the crystallizer, pull down the ingot rod until the consumable part is 10-30mm from the top, close the crystallizer and clamp it, so that the copper plate on the wide side of the crystallizer and the consumable part clamp the asbestos strip. A seal is achieved by compacting the asbestos strip between the wide side of the crystallizer and the consumable part. Measure the corner gaps to ensure they meet the requirements, and apply iron putty to the corners of the crystallizer.

[0043] The next step is to seal the gap between the consumable parts and the narrow surface of the crystallizer with asbestos, specifically by manually hammering it in, and then stacking combined cold materials on top, for example, stacking 4 iron plates on top for protection, and then placing an iron block on top to enhance the cooling effect.

[0044] The previously assembled cold-material iron sheet assemblies are placed sequentially between the width of the crystallizer and the cooling claws of the consumable parts; a small number of small iron sheets are used to shield and protect the iron blocks on the narrow side of the crystallizer to reduce the impact of molten steel during pouring. This process involves feeding molten steel onto the casting machine.

[0045] The next step is to lay asbestos around the top of the crystallizer for protection.

[0046] Use a warm air blower to dry the crystallizer.

[0047] Finally, the baking process was stopped, an inspection was conducted, and the medium-sized batch truck was driven to the crystallizer position to prepare for pouring.

[0048] The method for rapid preparation of a thin slab continuous casting machine disclosed in this embodiment involves first preparing the cold material to be used on the wide and narrow sides of the crystallizer, and then using the clamping pressure of the crystallizer to clamp the asbestos strip between the copper plate on the wide side of the crystallizer and the consumable parts to achieve a sealing effect.

[0049] By manually hammering asbestos into the narrow section and stacking cold material on top, and then sequentially placing the cold material iron sheet assembly between the width of the crystallizer and the cooling claw of the consumable part, the sealing of the crystallizer and the ingot head is achieved.

[0050] In summary, the above method for rapid machine preparation, through advance material preparation and the clamping pressure of the crystallizer, quickly achieves wide-area sealing. It is simple and easy to operate, which can significantly shorten the preparation time, thereby improving the production line operation rate and reducing the labor intensity of operators. Through this method, the crystallizer and the ingot head are tightly sealed, avoiding the accident of steel piercing during casting.

[0051] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0052] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for rapid setup of a thin slab continuous casting machine, characterized in that, include: Consumable parts, steel plates and shear plates are stacked in sequence and bound with tape to form a consumable parts assembly. Iron sheets are assembled to form a cold material iron sheet assembly with the same width as the crystallizer. After the spindle rod is inserted into place, install the entire consumable assembly on the head of the spindle rod, keep it centered and tighten the bolts; After the consumable parts assembly is installed, place the asbestos strips on the outside of the two long sides of the consumable parts assembly and secure them with tape; After fixing the asbestos strip, open the crystallizer pull-down rod, close the crystallizer and clamp it to compact the asbestos strip between the wide surface of the crystallizer and the consumable part; After the asbestos strip is clamped and sealed, the gap between the consumable parts and the narrow face of the crystallizer is sealed tightly with asbestos, and then the combined cold material is stacked on top. After the cold material is placed on the narrow side of the crystallizer, the cold material sheet assembly is sequentially placed between the wide side of the crystallizer and the consumable cooling claw. Then, the trolley is driven to the crystallizer position to prepare for pouring. The cold material sheet assembly includes multiple sets of iron sheets arranged in sequence. Each set of iron sheets includes three iron sheets stacked together and fixed with tape. In the cold material sheet assembly, there is a set of iron sheets belonging to the adjustable length group. The iron sheets in the adjustable length group have a partial overlap area with the two adjacent sets of iron sheets and are fixed with tape so that the overall length of the cold material sheet assembly is the same as the width of the crystallizer.

2. The method for rapid standby of a thin slab continuous casting machine as described in claim 1, characterized in that, Each sheet in the cold-material sheet assembly is 200mm long.

3. The method for rapid standby of a thin slab continuous casting machine as described in claim 1, characterized in that, The combined cold material at the narrow face of the crystallizer includes four stacked iron plates for protection and an additional iron block placed on the four iron plates.

4. The method for rapid standby of a thin slab continuous casting machine as described in claim 1, characterized in that, An asbestos strip installed on the long side of the consumable assembly has a width consistent with the thickness of the consumable and a length 50 mm longer than the length of the consumable.

5. The method for rapid standby of a thin slab continuous casting machine as described in claim 1, characterized in that, After fixing the asbestos strip to the long side of the consumable assembly, cut the plug plate in the consumable assembly according to the actual situation, so that the plug plate is 10-20mm away from the narrow side on both sides.

6. The method for rapid standby of a thin slab continuous casting machine as described in claim 3, characterized in that, After compacting the asbestos strip between the wide side of the crystallizer and the consumable parts, measure the corner gap to ensure it meets the requirements, and then apply iron putty to the corner of the crystallizer. After the cold material iron sheet assembly is stacked in sequence, small iron sheets are used to shield and protect the iron blocks at the narrow face of the crystallizer.

7. The method for rapid standby of a thin slab continuous casting machine as described in claim 1, characterized in that, After the final billet was poured, the radiation source was immediately shut off. Two people used a spare shovel and a high-pressure water gun to thoroughly clean the crystallizer. At the same time, they worked with the main control unit to check the cooling water in the second circuit, while one person checked the sector section.

8. The method for rapid standby of a thin slab continuous casting machine as described in claim 1, characterized in that, The method for rapid standby of a thin slab continuous casting machine further includes performing the following steps in sequence: Use compressed air to thoroughly dry the copper plate and surrounding area of ​​the crystallizer; One person uses an angle grinder to clean and polish the copper plate of the crystallizer and check for cracks in the copper plate, while another person mixes the graphite emulsion according to the ratio. After confirming that the copper plate is correct, one person uses a roller brush to evenly apply the prepared graphite emulsion to the copper plate of the crystallizer, while another person drives the ingot rod to a distance of 1 meter from the crystallizer and waits. Place the crystallizer guard plate into the crystallizer and move the derrick to the crystallizer position; After checking that the position and signal of the traction rod are normal, and ensuring that the personnel in the secondary cooling chamber have exited, proceed with the traction operation after confirming with the heating furnace station.

9. The method for rapid standby of a thin slab continuous casting machine as described in claim 8, characterized in that, To perform the ingot insertion operation, after the ingot rod is fully inserted into the crystallizer, the ingot rod is driven to the waiting position, and the crystallizer width is adjusted at the same time. The siphon rod is pulled to the bottom of the crystallizer and stopped. After the width adjustment is completed, the crystallizer parameters are measured using a crystallizer width measuring ruler and a taper meter. If the error exceeds the standard, the crystallizer is recalibrated until it meets the requirements. Move the ingot rod head upwards to 400mm above the crystallizer cover plate, insert the locking pin, and close the crystallizer; In this way, the guide rod was inserted into place.

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