Detachable multi-stage water-cooling crystallizer structure and application thereof in copper column continuous casting

Abstract

The invention relates to the technical field of continuous casting crystallizers, and discloses a detachable multi-stage water-cooling crystallizer structure and application thereof in copper column continuous casting, the detachable multi-stage water-cooling crystallizer structure comprises a cooling system and a crystallization pipe, the cooling system is used for cooling the crystallization pipe, the crystallization pipe comprises a plurality of crystallization plates, and the crystallization plates are arranged in the crystallization pipe. The crystallization pipe is formed by mutually splicing a plurality of crystallization plates in the direction around the axis of the crystallizer and the axial direction of the crystallizer, and the crystallization plates can move in the axial direction, so that replacement of the crystallization plates is realized; the cooling system comprises cooling pipes, the pipe walls of the cooling pipes are tightly attached to the outer pipe walls of the crystallization pipes, the crystallization plates correspond to one or more sets of cooling pipes, and the cooling system has the advantages that in the continuous casting production process, partition replacement of crystallizer copper plates can be achieved, the production cost of copper column continuous casting is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of continuous casting crystallizer, in particular to a detachable multi-stage water-cooled crystallizer structure and its application in copper column continuous casting. BACKGROUND

[0002] The continuous casting machine is applied to the non-ferrous metal continuous casting production field. Its production process is to continuously pour high-temperature metal melt into one or a group of water-cooled copper crystallizers. The melt gradually solidifies into a shell along the periphery of the crystallizer. After the shell solidifies to a certain thickness, the billet is pulled out by the straightening machine, and is cooled by water spraying in the secondary cooling zone to make the billet completely solidify. Then, the cutting device cuts it into a fixed size according to the rolling requirements.

[0003] The continuous casting crystallizer is the core component of the continuous casting machine. It mainly receives the steel liquid and cools it to form a shell. The device is mainly composed of a frame, a copper plate, a cooling system, etc. Due to the thin primary shell and large heat flow under the condition of high-speed continuous casting, the temperature of the copper wall heat surface increases significantly, which aggravates the melting loss of the copper plate in the meniscus region, and reduces the service life of the crystallizer. When replacing the melted crystallizer, the continuous casting production needs to be interrupted, which not only increases the production cost, but also reduces the production efficiency.

[0004] In view of the above, there is an urgent need for a detachable multi-stage water-cooled crystallizer structure that can realize the replacement of the crystallizer copper plate in the continuous casting production process, reduce the production cost of copper column continuous casting, and improve the production efficiency. SUMMARY

[0005] In view of the problems of high replacement cost and reduced production efficiency after the melting of the copper plate in the prior art, a detachable multi-stage water-cooled crystallizer structure is proposed, which can realize the replacement of the crystallizer copper plate in the continuous casting production process, reduce the production cost of copper column continuous casting, and improve the production efficiency.

[0006] In order to solve the above problems, the technical scheme of the present application is as follows: A detachable multi-stage water-cooled crystallizer structure, comprising a cooling system and a crystallization tube, the cooling system is used to provide cooling for the crystallization tube, the crystallization tube comprises a plurality of crystallization plates, the crystallization tube is composed of a plurality of crystallization plates distributed around the crystallizer axis and connected to each other, and the crystallization plates can move in the axial direction; the cooling system comprises a cooling pipe, and the pipe wall of the cooling pipe is in close contact with the outer pipe wall of the crystallization tube.

[0007] As a preferred technical scheme, the cooling pipe is provided with a plurality of groups, and each crystallization plate corresponds to one or more groups of cooling pipes.

[0008] As a preferred technical scheme, a temperature sensor is arranged on one side of the water outlet of each cooling pipe, and the temperature sensor is used to detect the temperature change of the cooling water in the cooling pipe.

[0009] As a preferred technical solution, several said crystalline plates are spliced with each other in the axial direction.

[0010] As a preferred technical solution, the top of the upper end of said crystalline plate and the bottom of the lower end of said crystalline plate are provided with corresponding extrusion mechanisms in the axial direction, and the extrusion mechanisms at both ends provide compression force for each said crystalline plate in the middle.

[0011] As a preferred technical solution, said extrusion mechanism comprises a telescopic ejector rod, the top of said telescopic ejector rod is in contact with said crystalline plate, and the contact width is less than the wall thickness of said crystalline plate.

[0012] As a preferred technical solution, said crystalline tube is provided with spare said crystalline plates, and the radial direction of said crystalline plates at both upper and lower ends is provided with corresponding access tracks, and said crystalline plates can be transported along said access tracks by a transfer mechanism.

[0013] As a preferred technical solution, it further comprises a limiting baffle, said limiting baffle is arranged at the uppermost end and the lowermost end of said crystalline plate in the axial direction, the inner hole of said limiting baffle is larger than the hollow inner diameter of said crystalline tube, and said telescopic ejector rod is located in said inner hole, and said limiting baffle and said telescopic ejector rod can simultaneously contact said crystalline plate.

[0014] In order to solve the continuous casting problem of copper column, the application also provides an application of a detachable multi-stage water-cooled crystallizer structure in copper column continuous casting: The application of a detachable multi-stage water-cooled crystallizer structure in copper column continuous casting, in the process of continuous casting of copper column, uses the detachable multi-stage water-cooled crystallizer structure for cooling crystallization, wherein, in the production process of copper column, the crystallizer is replaced.

[0015] The beneficial effects of the application are: The detachable multi-stage water-cooled crystallizer structure comprises a crystalline tube composed of a plurality of crystalline plates, and said crystalline plates are distributed around the crystallizer axis and spliced with each other, the crystalline tube distributed around the crystallizer axis and spliced with each other does not need to pass through the molten liquid during replacement, that is, the work of the continuous casting machine does not need to be stopped during replacement, and the crystalline plates distributed around the crystallizer axis can provide limiting action between the abutting crystalline plates during replacement; the cooling pipeline adopts a separate pipeline structure, which can provide corresponding limiting for the crystalline tube; the crystalline plates can move in the axial direction, so that they can be replaced during continuous casting, greatly improving the production efficiency and reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a planar section view of the detachable multi-stage water-cooled crystallizer structure; Figure 2For Figure 1 The crystallization plate replacement schematic diagram of the detachable multi-stage water-cooled crystallizer structure shown in the figure; Figure 3 The partial three-dimensional schematic diagram of the crystallization tube composed of multiple layers of crystallization plates and multiple layers of cooling tubes; Figure 4 The three-dimensional schematic diagram of the detachable multi-stage water-cooled crystallizer structure with the extrusion mechanism Figure 1 ; Figure 5 The three-dimensional schematic diagram of the detachable multi-stage water-cooled crystallizer structure with the extrusion mechanism Figure 2 ; Figure 6 The internal schematic diagram of the detachable multi-stage water-cooled crystallizer structure with the extrusion mechanism; Figure 7 The schematic diagram of the extrusion mechanism; Figure 8 The schematic diagram of the crystallization plate with a clamping block and the cooling tube with a clamping groove; Figure 9 The partial schematic diagram of the bottom entry-exit track area in the initial state; Figure 10 The partial schematic diagram of the top entry-exit track area in the initial state; Figure 11 The partial schematic diagram of the top entry-exit track area in the lower moving completed state; Figure 12 The partial schematic diagram of the bottom entry-exit track area in the lower moving completed state; Figure 13 The partial state schematic diagram in the crystallization plate replacement process.

[0017] The reference signs and components involved in the drawings are as follows: 1, crystallization tube; 11, crystallization plate; 111, clamping block; 2, cooling tube; 21, water outlet; 22, water inlet; 23, clamping groove; 3, extrusion mechanism; 31, telescopic top rod; 32, driving structure; 4, entry-exit track; 5, limiting baffle; 6, push-pull rod. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in combination with the drawings of the specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] In order to better understand the structure of the detachable multi-stage water-cooled crystallizer and its application in copper column continuous casting provided by the embodiment; first of all, the existing crystallizer is briefly introduced, such as the Chinese patent application No. 201911071794X discloses a square billet continuous casting crystallizer and cooling method, including the crystallizer body, the first cooling water channel is arranged in the pipe wall of the crystallizer body, the water tank is arranged at the position corresponding to the liquid steel impact area of the inner surface of the crystallizer body, the annular cooling area is formed between the water tank and the outer surface of the crystallizer body, the cooling water jacket is arranged below the water tank on the periphery of the crystallizer body, and the gap type cooling water channel is formed between the cooling water jacket and the outer surface of the crystallizer body. In order to avoid the problem that the local temperature of the crystallizer is too high caused by the rapid impact of the metal liquid on the inner surface of the crystallizer at high pulling speed, the first cooling water channel, the water tank and the gap type cooling water channel are arranged on the pipe wall of the crystallizer body, so that the cooling capacity of the crystallizer is improved to avoid the high temperature damage, but the service life of the crystallizer is maintained, but the quality demand of the product cannot be met, such as in the continuous casting process of the copper column, the cooling speed of the crystallizer has a significant influence on the organization structure, mechanical properties, surface quality and internal defects of the copper column, and the cooling efficiency of the crystallizer is limited in a certain range in order to obtain a product with specific performance, so that the performance of the product is guaranteed, and the damaged crystallizer can be replaced each time. In order to replace the crystallizer without affecting the production of the product, the detachable multi-stage water-cooled crystallizer structure is provided as follows: Please refer to the attached Figure 1 , Figure 1 The detachable multi-stage water-cooled crystallizer structure is a plane cut schematic view; a detachable multi-stage water-cooled crystallizer structure, which comprises a cooling system and a crystallization pipe 1, the cooling system is used for providing cooling for the crystallization pipe 1; specifically, the crystallization pipe 1 is composed of a plurality of crystallization plates 11, in this embodiment, taking the cylindrical crystallization pipe 1 as an example, the crystallization plates 11 are provided in two groups, and the two groups of crystallization plates 11 are distributed around the axis of the crystallization pipe 1 and are butted to form the hollow cylindrical crystallization pipe 1. The cooling system comprises a cooling pipe 2 arranged outside the crystallization pipe 1, the cooling pipe 2 is provided with a water outlet 21 and a water inlet 22, and the cooling pipe 2 is tightly attached to the outer pipe wall of the crystallization pipe 1. In this embodiment, in order to fix the crystallization pipe 1, the main body of the cooling pipe 2 is also a hollow cylindrical structure, and the pipe wall thereof is a cavity structure connected with the water outlet 21 and the water inlet 22, the two crystallization plates 11 are clamped at the hollow center of the cooling pipe 2, the friction force between the crystallization plate 11 and the cooling pipe 2 can prevent the crystallization pipe 1 from falling, and the crystallization pipe 1 can move axially relative to the cooling pipe 2 under the push of the axial force.

[0020] Please refer to the attached Figure 2 ,Figure 2 As Figure 1 The crystallization plate replacement schematic diagram of the detachable multi-stage water-cooled crystallizer structure shown in the figure; during the use of the detachable multi-stage water-cooled crystallizer structure, after the detachable multi-stage water-cooled crystallizer structure is fixed on the corresponding mounting seat or vibration device, the circulating cooling water is introduced into the cooling pipe 2, the metal melt in the tundish above the crystallization pipe 1 flows into the crystallization pipe 1 through the liquid leakage pipe, wherein the liquid outlet of the liquid leakage pipe is located in the crystallization pipe 1, that is, below the upper end face of the crystallization pipe 1, in the crystallization pipe 1, the heat of the metal melt is taken away by the cooling water in the cooling pipe 2, and cooling and crystallization occur, and the crystallized metal column is introduced into other structures of the continuous casting machine from the opening at the other end of the crystallization pipe 1 to complete the subsequent operation and processing, in the crystallization pipe 1, the high-temperature metal melt burns the wall of each crystallization plate 11, causing the wall of the crystallization plate 11 to be thinned by melting, in this embodiment, in order to replace the crystallization plate 11 without stopping, a new crystallization plate 11 with the same specification can be aligned and placed above the crystallization plate 11 to be replaced, and the crystallization plate 11 is pressed downward, under the pressure, the original crystallization plate 11 gradually separates from the bottom of the cooling pipe 2, and the new crystallization plate 11 gradually enters the coverage area of the cooling pipe 2 and replaces the original crystallization plate 11, that is, the replacement of the crystallization pipe 1 is realized without stopping. It should be noted that the side wall of the crystallization plate 11 opposite to the replaced crystallization plate 11 has a certain thickness, which can provide radial limiting for the new entering crystallization plate 11, so as to avoid the crystallization plate 11 from falling into the metal melt and damaging the crystal structure of the melt, in some preferred embodiments, two crystallization plates 11 can be replaced at the same time, that is, the butt joint new crystallization plate 11 is aligned with the original crystallization plate 11 at the upper end of the original crystallization pipe 1, and then inserted along the inner wall of the cooling pipe 2 to complete the replacement of the worn crystallization pipe 1 without stopping the continuous casting.

[0021] The detachable multi-stage water-cooled crystallizer structure includes a crystallization pipe 1 composed of a plurality of crystallization plates 11, and a plurality of the crystallization plates 11 are distributed around the crystallizer axis and are spliced with each other; it should be understood that the annular crystallization pipe 1 must stop the operation of the continuous casting machine before the replacement of the crystallization pipe 1, otherwise it needs to pass through the high-temperature metal melt, and at the same time, the original annular crystallization pipe 1 also needs to carry the internal metal melt or metal embryo to separate from the original continuous casting track, which also interrupts the continuous casting effect of the continuous casting equipment, and the crystallization pipe 1 distributed around the crystallizer axis and spliced with each other in the present application does not need to pass through the melt during replacement, that is, the work of the continuous casting machine does not need to be stopped during replacement, and the crystallization plates 11 aligned on the crystallizer axis can provide limiting action to each other during replacement, and the cooling pipe 2 road adopts a separate pipe structure, which can provide corresponding limiting for the crystallization pipe 1; the crystallization plate 11 can move axially, so that it can be replaced during continuous casting.

[0022] Please refer to the attached drawings Figure 3 , Figure 3 Fig. 1 is a schematic diagram of a crystallization tube composed of multiple layers of crystallization plates and a multi-layer cooling tube; in some preferred embodiments, in order to improve the cooling efficiency of the crystallization tube 1, the cooling tube 2 is provided with several groups distributed along the axis of the crystallization tube 1, and each group can also be provided with multiple cooling tubes 2 distributed around the axis of the crystallization tube 1, each cooling tube 2 uses separate cooling water supply to divide the outer wall surface of the crystallization tube 1 into several independent cooling areas and cooling effects, greatly reducing the cooling area responsible for each cooling tube 2, making it possible to fine-tune the cooling temperature, and also allowing the passage of cooling water at different temperatures to achieve multi-stage water cooling control, thereby controlling the quality of the product. Specifically, in the above embodiment, one group of cooling tubes 2 is provided with two cooling tubes 2 distributed around the axis of the crystallization tube 1, preferably, the cooling tubes 2 are provided with adaptive pressure in the radial direction of the crystallization tube 1 through external structures such as hydraulic telescopic rods, etc., the pressure is transmitted to the crystallization plates 11 wrapped by the cooling tubes 2, which can increase the friction between the crystallization plates 11 and the cooling tubes 2, i.e. increase the stability of the system, and also avoid gaps between the crystallization plates 11 aligned around the crystallizer axis, i.e. radially opposite, in some embodiments, the cooling tubes 2 can also be provided in four groups, with each two groups stacked vertically, the vertically stacked cooling tubes 2 provide cooling for one of the crystallization plates 11, and the other two groups of vertically stacked cooling tubes 2 provide cooling for the opposite crystallization plate 11, further reducing the cooling area of each cooling tube 2 and improving the fine-tuning control effect of the cooling system.

[0023] Please refer to the attached drawings Figure 3 Since the temperature of the high-temperature metal melt in the crystallization tube 1 gradually decreases from top to bottom, the melting loss caused by high temperature gradually decreases from top to bottom on the crystallization plate 11, when melting loss occurs, the replaced crystallization plate 11 is often located at the upper part with greater melting loss, and the lower part with smaller melting loss, and the lower part requires lower surface roughness of the crystallization plate 11 due to the reduced temperature of the metal melt and the formation of the outer embryo, in order to reduce production costs and improve the utilization rate of the crystallization plate 11, in some preferred embodiments, the crystallization tube 1 is not only spliced in the radial direction around the crystallizer axis, but also spliced along the axis of the crystallizer, as in this embodiment, the crystallization tube 1 is composed of 15 crystallization plates 11, of which every three crystallization plates 11 are combined into a complete annular structure around the axis of the crystallizer, and the annular structure is part of the crystallization tube 1, five groups of annular structures composed of 15 crystallization plates 11 are spliced along the axis of the crystallizer to form a complete hollow cylindrical crystallization tube 1, similarly, the cooling tube 2 is also provided with 15 groups corresponding to the crystallization plates 11, in the replacement of the crystallization plates 11, only one crystallization plate 11 at the upper end needs to be replaced each time, greatly reducing production costs.

[0024] Please see the attached Figure 4 , attached Figure 5 , attached Figure 6 , Figure 4 is a three-dimensional schematic diagram of the detachable multi-stage water-cooled crystallizer structure with a pressing mechanism Figure 1 ; Figure 5 is a three-dimensional schematic diagram of the detachable multi-stage water-cooled crystallizer structure with a pressing mechanism Figure 2 ; Figure 6 is a schematic diagram of the inside of the detachable multi-stage water-cooled crystallizer structure with a pressing mechanism; in order to avoid axial superposition, a gap is left between the crystallization plates 11, and the top of the uppermost crystallization plate 11 and the bottom of the lowermost crystallization plate 11 are provided with corresponding pressing mechanisms 3 in the axial direction, the pressing mechanisms 3 at both ends provide pressing force for the crystallization plates 11 in the middle of the axial direction, preferably, in the above embodiment, the annular structure of the crystallization tube 1 is composed of three crystallization plates 11 around the crystallizer axis, and five groups of annular structures of crystallization plates 11 are stacked along the crystallizer axis to form the crystallization tube 1; the pressing mechanisms 3 are provided at both ends of the crystallization tube 1, and three pressing mechanisms 3 are provided corresponding to the three crystallization plates at both ends, and the pressing mechanisms 3 at both ends press the crystallization tube 1 in opposite directions. Specifically, in order to provide continuous pressing force to the crystallization tube 1 during the replacement of the crystallization plates 11, in this embodiment, one crystallization plate 11 is reserved at the axial upper end of the crystallization tube 1, and an access track 4 is further provided at both ends for the crystallization plates 11 to access the crystallizer in the radial direction of the crystallizer, the height of the access track 4 is consistent with the height of the crystallization plate 11, and an external transfer mechanism can complete the taking and delivering of the crystallization plate 11 along the access track 4, specifically, please see the attached Figure 7 , Figure 7 is a schematic diagram of the pressing mechanism; the pressing mechanism 3 includes a telescopic top rod 31 and a driving structure 32, the driving structure 32 drives the telescopic top rod 31 to extend and retract, the top of the telescopic top rod 31 has a smaller diameter than the wall thickness of the crystallization plate 11 and is located on the inside of the crystallization plate 11, limit stop plates 5 are provided on both sides of the uppermost and lowermost axial crystallization plates 11, the inner hole of the limit stop plate 5 is larger than the hollow inner diameter of the crystallization tube 1, and the telescopic top rod 31 is located in the inner hole, the upper end surface of the uppermost crystallization plate 11 is in contact with the lower surface of the corresponding limit stop plate 5 above, and the lower end surface of the lowermost crystallization plate 11 is in contact with the upper surface of the corresponding limit stop plate 5 below, it should be understood that the end surface of the crystallization plate 11 is divided into two parts, the inside is in contact with the top end of the telescopic top rod 31, and the outside is in contact with the limit stop plate 5. Preferably, in order to further improve the stability of the system, please see the attached Figure 8 , Figure 8The diagram shows a crystallizing plate with a locking block and a cooling pipe with a locking groove. The outer wall of the crystallizing plate 11 is provided with a locking block 111, and the wall of the corresponding cooling pipe 2 is provided with a locking groove 23 that is adapted to the locking block 111. The transfer mechanism includes a push-pull rod 6 and the top of the push-pull rod 6 is also provided with a locking groove 23 that is adapted to the locking block 111.

[0025] In the initial state, please refer to the appendix. Figure 9 , Figure 9 This is a partial schematic diagram of the bottom entry / exit track area in the initial state; the telescopic top rod 31 of the extrusion mechanism 3 located below the crystallizer tube 1 is in the extended state and is pressing against the lowest crystallizer plate 11, and the push-pull rod 6 of the transfer mechanism below is located inside the entry / exit track 4, and the slot 23 on the push-pull rod 6 coincides axially with the slot 23 on the upper cooling pipe 2; there is a ring of spare crystallizer plates 11 above the crystallizer tube 1 to replace the lower crystallizer plate 11 (e.g. Figure 13 The topmost spare crystallizer plate 11 shown in section a), please refer to the appendix. Figure 10 , Figure 10 This is a partial schematic diagram of the top entry / exit track area in the initial state. The telescopic rod 31 of the extrusion mechanism 3 at the upper end of the spare crystallizing plate 11 is in a retracted state, and the upper limit baffle 5 is simultaneously in contact with the top of the spare crystallizing plate 11. At this time, the locking block 111 of the spare crystallizing plate 11 is simultaneously engaged with the push-pull rod 6 within the upper entry / exit track 4. When it is necessary to replace the crystallizing plate 11 of the lower crystallizing tube 1, such as... Figure 13 As shown in section b, the upper telescopic rod 31 begins to extend, while the lower telescopic rod 31 simultaneously begins to retract. Please refer to the appendix. Figure 11 , Figure 11 This is a partial schematic diagram of the top entry and exit track area after the downward movement is complete; the spare crystallizing plate 11 first disengages from the limiting baffle 5, then disengages from the connection with the upper push-pull rod 6, and gradually enters the lower cooling pipe 2. Please refer to the attached diagram. Figure 12 , Figure 12 This is a partial schematic diagram of the bottom entry / exit track area after the downward movement is complete. The lowest crystallizing plate 11 gradually detaches from the cooling pipe 2, and the locking block 111 of the lower crystallizing plate 11 first engages in the slot 23 of the lower push-pull rod 6 and continues to move downward until it contacts the lower limiting baffle 5. At this time, the push-pull rod 6 of the transfer mechanism begins to retract and withdraw from the entry / exit track 4. Figure 13 As shown in section c, when the lower crystallizing plate 11 moves to the point of disengaging from the telescopic push rod 31, the telescopic push rod 31 begins to extend until it contacts the lower end of the crystallizing plate 11 located in the cooling pipe 2. Between the contact between the telescopic push rod 31 and the crystallizing plate 11, the removed crystallizing plate 11 can pause its movement or remain in contact with the upper crystallizing plate 11. Simultaneously, the upper push rod 6, carrying a new spare crystallizing plate 11, re-enters along the in-and-out track 4. Figure 13As shown in the middle D part, when the upper and lower ends of the new spare crystallization plate 11 simultaneously contact the upper end of the crystallization plate 11 and the lower surface of the limiting baffle 5, the telescopic jacks 31 in this area start to retract; when the upper new spare baffle is reconnected between the crystallization plate 11 and the limiting baffle 5, and the lower telescopic jacks 31 contact the crystallization plate 11, the lower crystallization plate 11 can be completely removed, and when the telescopic jacks 31 in this area of the upper spare crystallization plate 11 retract to the lower surface of the limiting baffle 5, the spare crystallization plate 11 is continuously pushed to be flush with the lower crystallization tube 1, and at this time, the replacement of the crystallization plate 11 is completed.

[0026] In the above embodiment, the detachable multi-stage water-cooled crystallizer structure of the present application is provided with extrusion mechanisms 3 on the upper and lower sides of the crystallization tube 1 composed of multiple crystallization plates 11, which can provide axial pressure to the crystallization tube 1 to maintain the integrity of each crystallization plate 11, and the telescopic jacks 31 of the extrusion mechanisms 3 cooperate with the limiting baffles 5 to alternately cooperate during the entry and exit of the upper and lower crystallization plates 11, so that at least one extrusion mechanism 3 and one limiting baffle 5 simultaneously hold the upper and lower ends of the crystallization tube 1 composed of crystallization plates 11 during disassembly. The detachable multi-stage water-cooled crystallizer structure of the present application can automatically disassemble and replace the molten crystallization plate 11 during continuous casting. It should be understood that the molten liquid in each section of the crystallization tube 1 has different quality requirements for the inner wall during the replacement of the crystallization plate 11. The upper end of the molten crystallization plate 11 can continue to be used at the end. Therefore, the present application greatly reduces the production cost of continuous casting, and at the same time, the crystallization plate 11 in the area with higher requirements can be replaced, or the crystallization plate 11 can be replaced at regular intervals to ensure the quality of the product. It should be noted that the drive structure 32 controlling the telescopic jacks 31 can be a screw telescopic, hydraulic telescopic structure, etc. Similarly, the transfer mechanism is used to control the advance and retreat of the push-pull rod 6, which can also be a screw telescopic and hydraulic telescopic structure. The movement mode is the prior art, which will not be described here. After the push-pull rod 6 moves out of the entry and exit track 4, the clamping block 111 of the new crystallization plate 11 is inserted into the clamping groove 23 of the push-pull rod 6, and then the push-pull rod 6 is used to send the new crystallization plate 11 into the upper part of the crystallization tube 1 as a spare crystallization plate 11. Similarly, after the push-pull rod 6 at the bottom pulls out the replaced crystallization plate 11, the crystallization plate 11 can be directly taken out along the clamping groove 23, and then the empty push-pull rod 6 is reset. The leakage pipe of the tundish is located in the crystallization tube 1 below the spare crystallization plate 11, so that the spare crystallization plate 11 is not affected by high-temperature melting during preparation above it, and the heat emitted by the molten liquid can also be used to preheat the spare crystallization plate 11, which avoids sudden high-temperature changes in the material properties of the crystallization plate 11 and also avoids the instantaneous cooling of the metal molten liquid due to the temperature change of the new crystallization plate 11.

[0027] In some preferred embodiments, a temperature sensor is arranged in each cooling pipe 2, and the temperature sensor is arranged on one side of the water outlet 21 to measure the temperature of the cooling liquid after passing through the crystallization plate 11. When the measured temperature is higher than the previous temperature, it can be judged that the wall of the crystallization pipe 1 is thinned and a certain amount of melting loss has occurred, so the replacement of the crystallization plate 11 is started, which solves the problem that the loss of the crystallization plate 11 cannot be observed during continuous casting, and the accurate replacement of the crystallization plate 11 can be realized, and the production cost is further reduced. It should be noted that the temperature sensor and the subsequent temperature data transmission system are prior art.

[0028] The detachable multi-stage water-cooled crystallizer structure can be applied in copper column continuous casting. In the continuous casting process of the copper column, the detachable multi-stage water-cooled crystallizer structure is used for cooling and crystallization, so that the crystallizer that has been worn can be replaced during the production process of the copper column, thereby realizing non-stop production of the copper column and reducing the cost of production interruption caused by replacing the crystallizer, that is, improving the production efficiency.

[0029] The above is only the preferred embodiment of the present application. It should be noted that those skilled in the art can make several improvements and supplements without departing from the principles of the present application, and these improvements and supplements should also be considered within the protection scope of the present application.

Claims

1. A detachable multi-stage water-cooled crystallizer structure comprising a cooling system for providing cooling to a crystallization tube, characterized in that, The crystallization tube comprises several crystallization plates, the crystallization tube is composed of several crystallization plates distributed around the crystallizer axis and spliced with each other, and the crystallization plates can move in the axial direction; the cooling system comprises cooling pipes, and the pipe wall of the cooling pipe is in close contact with the outer pipe wall of the crystallization tube.

2. The detachable multi-stage water-cooled crystallizer structure according to claim 1, wherein, The cooling pipes are provided in several groups, and each of the crystallization plates corresponds to one or more groups of the cooling pipes.

3. The detachable multi-stage water-cooled crystallizer structure according to claim 2, wherein, A temperature sensor is arranged on one side of the water outlet of each of the cooling pipes, and the temperature sensor is used to detect the temperature change of the cooling water in the cooling pipe.

4. The detachable multi-stage water-cooled crystallizer structure according to claim 1, wherein, The several crystallization plates are spliced with each other in the axial direction.

5. The detachable multi-stage water-cooled crystallizer structure according to claim 4, wherein, In the axial direction, the top of the upper-end crystallization plate and the bottom of the lower-end crystallization plate are provided with corresponding extrusion mechanisms, and the extrusion mechanisms at both ends provide compression force for each of the crystallization plates in the middle.

6. The detachable multi-stage water-cooled crystallizer structure according to claim 5, wherein, The extrusion mechanism comprises a telescopic jack, the top of the telescopic jack is in contact with the crystallization plate, and the contact width is less than the wall thickness of the crystallization plate.

7. The detachable multi-stage water-cooled crystallizer structure according to claim 6, wherein, The crystallization tube is provided with spare crystallization plates, and the upper and lower ends of the crystallization plates are provided with corresponding in-out tracks in the radial direction, and the crystallization plates can be transported along the in-out tracks by a transfer mechanism.

8. The detachable multi-stage water-cooled crystallizer structure according to claim 7, wherein, A limiting baffle is further included, which is arranged at the uppermost end and the lowermost end of the crystallization plate in the axial direction, the inner hole of the limiting baffle is larger than the hollow inner diameter of the crystallization tube, the telescopic jack is located in the inner hole, and the limiting baffle and the telescopic jack can simultaneously contact the crystallization plate.

9. The use of a detachable multi-stage water-cooled crystallizer structure in copper column continuous casting, characterized in that, In the continuous casting process of the copper column, the detachable multi-stage water-cooled crystallizer structure of any one of claims 1-8 is used for cooling crystallization, wherein the crystallizer is replaced during the production of the copper column.

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