Slab continuous casting device with cooling function and preparation process thereof

Abstract

The invention discloses a slab continuous casting device with a cooling function and a preparation process thereof, and relates to the technical field of continuous casting devices.The slab continuous casting device comprises a rotary tower, an intermediate tank, a crystallizer, a supporting guide roller and a cooling device.The rotary tower is fixedly connected with the intermediate tank, the intermediate tank is fixedly connected with the crystallizer and communicated with the crystallizer, and the supporting guide roller is fixedly connected with the cooling device; the supporting guide roller is located below the crystallizer, the cooling device is located in the conveying direction of the supporting guide roller, molten casting liquid is conveyed to the intermediate tank through the rotary tower, then the molten casting liquid is conveyed into the crystallizer through the intermediate tank, the casting liquid is primarily cooled through the crystallizer, and the casting liquid is cooled to the corresponding plate blank shape; and then the plate blank is conveyed to the cooling device through the supporting guide roller for secondary cooling, so that the temperature of the plate blank is rapidly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of continuous casting devices, in particular to a slab continuous casting device with a cooling function and a preparation process thereof. Background Art

[0002] Slab continuous casting, a core process in the field of steel metallurgy, aims to achieve rapid solidification and forming of liquid metal through efficient cooling, thereby producing high-quality, homogenized slab products. In traditional continuous casting, the mold serves as the core component for initial cooling, and its internal flow channel design directly impacts cooling efficiency and slab surface quality.

[0003] In the prior art, the cooling water flow channels of the crystallizer mostly adopt a straight or simply curved structure, and the water flow easily forms a laminar flow in the flow channel, resulting in limited heat exchange efficiency. After the cooling water temperature rises rapidly, the cooling capacity drops significantly. At the same time, the design of the existing crystallizer cooling channel lacks adaptability to the temperature gradient distribution of the slab. In view of the situation where the temperature in the upper half of the crystallizer is higher and requires a higher cooling intensity, and the temperature in the lower half gradually decreases, the traditional crystallizer is difficult to adapt to the temperature change law of this part, which easily causes local overcooling and overheating. In addition, the slab often faces the problem of poor cooling effect in the secondary cooling area. Traditional spray cooling devices mostly adopt a fixed nozzle structure. The droplets formed by the mixture of high-pressure water and gas are easy to form a steam film on the surface of the high-temperature slab, which hinders the direct contact between the cooling medium and the slab and reduces the heat exchange efficiency. At the same time, the impurity particles carried in the cooling water are easy to cause nozzle blockage, and frequent maintenance leads to increased production costs. Summary of the Invention

[0004] The object of the present invention is to provide a slab continuous casting device with a cooling function and a preparation process thereof, so as to solve the problems raised in the prior art.

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

[0006] A slab continuous casting device with a cooling function and a technical solution for its preparation process, the slab continuous casting device includes a rotary tower, a tundish, a crystallizer, support guide rollers and a cooling device, the rotary tower and the tundish are tightly connected, the tundish and the crystallizer are tightly connected, the tundish and the crystallizer are communicated, the support guide rollers are located below the crystallizer, and the cooling device is located in the conveying direction of the support guide rollers.

[0007] The melted casting liquid is sent to the intermediate tank through the rotary tower, and then sent to the crystallizer through the intermediate tank. When the casting liquid passes through the crystallizer, the casting liquid is preliminarily cooled by the crystallizer so that the casting liquid is cooled to the corresponding slab shape. At this time, the slab is cooled to the corresponding shape by the cooling effect of the crystallizer, but the internal temperature of the slab is still high. The slab is then sent to the cooling device for secondary cooling through the supporting guide roller, thereby quickly reducing the temperature of the slab and allowing the slab to be quickly formed.

[0008] Furthermore, the crystallizer is provided with a first water inlet, an upper flow channel, and a first water outlet. The first water inlet is connected to the upper flow channel, and the upper flow channel is connected to the first water outlet at one end away from the first water inlet. The width of the upper flow channel gradually narrows, and the part of the upper flow channel connected to one end of the first water inlet is the widest, and the end of the upper flow channel connected to the first water outlet is the narrowest. The cross-sectional shape of the upper flow channel is wavy.

[0009] After the casting liquid enters the crystallizer through the intermediate tank, high-speed cooling water used to cool the upper casting liquid flows in from the first water inlet, then flows through the upper flow channel, and finally flows out from the first water outlet. When the cooling water flows in the wavy upper flow channel, the wavy upper flow channel causes the cooling water to repeatedly accelerate and decelerate in the upper flow channel. In the area from the crest to the trough of the upper flow channel, the water flow speed is accelerated and the pressure is reduced. In the area from the trough to the crest of the upper flow channel, the water flow speed is reduced and the pressure is increased. Turbulence is caused by the change in pressure gradient, and the heat exchange between the water flow and the crystallizer is accelerated by the turbulence. The turbulence formed by the high-speed cooling water in the upper flow channel quickly takes away the heat of the casting liquid in the crystallizer, avoiding the reduction of cooling effect due to excessive water temperature.

[0010] Furthermore, the crystallizer is provided with a second water inlet, a lower layer flow channel and a second water outlet. The second water inlet is connected to the lower layer flow channel, and the lower layer flow channel is connected to the second water outlet at one end away from the second water inlet. The lower layer flow channel is spiral, and the spiral spacing of the lower layer flow channel gradually decreases.

[0011] The spiral shape of the lower runner changes with the shape of the crystallizer. When the slab enters the cooling range of the lower runner from the cooling range of the upper runner of the crystallizer, the coolant entering from the second water inlet enters the lower runner to cool the slab in the cooling range of the lower runner, and then flows out from the second water outlet. The cooling water rotates continuously in the lower runner through the spiral lower runner, thereby generating centrifugal force. The centrifugal force pushes the fluid to the outside of the lower runner, thereby generating a radial pressure gradient, causing the cooling water to generate a secondary flow, thereby forming turbulence, and strengthening the cooling water through the turbulent flow. The number of impacts between the cooling water and the lower flow channel increases, thereby enhancing the heat exchange effect of the cooling water in the lower flow channel on the crystallizer. At the same time, the spiral pitch of the lower flow channel gradually decreases, which meets the temperature distribution requirements of the slab surface with high temperature at the top and low temperature at the bottom. When the cooling water at the temperature angle flows in from the second water inlet at the beginning, the cooling water at the temperature angle takes away a large amount of heat from the surface of the slab. At the same time, as the cooling water gradually flows downward, the cooling water temperature gradually increases. The heat exchange effect is enhanced by reducing the distribution of the spiral pitch. At the same time, the lower heat exchange rate of the cooling water with higher temperature is conducive to improving the heat distribution on the slab, thereby alleviating the situation of local low temperature and overheating on the slab.

[0012] Furthermore, the cooling device includes a support plate, a connecting plate, a cooling nozzle, an electrode device and a magnetic field emission device. The support plate is placed on both sides of the support guide roller, the connecting plate is located above the support guide roller, the support plate and the connecting plate are fastened together, the connecting plate and the cooling nozzle are rotatably connected, the electrode device and the cooling nozzle are clamped together, and the magnetic field emission device and the support plate are fastened together.

[0013] The support plate is used as the main installation base for the installation and positioning of other components. The connecting plate is installed directly above the support guide roller through the support plate. By installing the connecting plate directly above the support guide roller, the cooling nozzle can be installed directly above the support guide roller. At the same time, when the side temperature of the slab is not cooled enough, a cooling nozzle can be added on the side of the support plate close to the slab to cool the side of the slab. When the cooling nozzle cools the slab, high-pressure water and compressed air are introduced into the cooling nozzle so that the cooling nozzle can spray droplets. The water mist sprayed by the cooling nozzle is charged by the electrode device, and the charge on the small water droplets forming the water mist is concentrated on the outside of the water droplets, which increases the controllability of the water droplets in the magnetic field. The charged water droplets are accelerated by the magnetic field emission device, which increases the speed of the water droplets and strengthens the magnetic field at the edge of the slab, so that the water droplets can be cooled in the edge area of ​​the slab. At the same time, the accelerated droplets can also rush through the steam film, so that the droplets can directly cool the slab. At the same time, the accelerated water droplets will also break into smaller units under high-speed impact, thereby improving the cooling effect of the droplets on the slab.

[0014] Furthermore, the cooling nozzle includes a nozzle support frame, a nozzle housing, a rotating column, a turbine and a nozzle, the nozzle support frame and the nozzle housing are tightly connected, the nozzle housing and the nozzle are connected, the rotating column and the turbine are connected, a rotating column is provided in the nozzle housing, the rotating column and the nozzle housing are rotatably connected, a water supply chamber and a centrifugal flow channel are provided on the rotating column, the turbine is placed in the water supply chamber, the turbine and the water supply chamber are tightly connected, the water supply chamber and the centrifugal flow channel are communicated, and the centrifugal flow channel is communicated with the nozzle.

[0015] The nozzle support frame serves as the main installation base for the installation and positioning of other equipment. At the same time, the nozzle housing provides an installation position for other components. By introducing high-pressure water and compressed air into the rotating column, the turbine in the rotating column rotates, and the rotation of the turbine drives the rotating column to rotate. The rotation of the rotating column drives the water delivery cavity and the centrifugal flow channel to rotate, so that the water flow in the centrifugal flow channel generates centrifugal acceleration, centrifuging the impurity particles with higher density in the water flow to the outside and then discharge them.

[0016] Furthermore, a water inlet hole and a drainage groove are provided on the nozzle, the water inlet hole is communicated with the centrifugal flow channel, and the drainage groove is communicated with the centrifugal flow channel.

[0017] The water flow after centrifugation through the centrifugal flow channel enters through the water inlet hole and then sprays out. The water flow with impurities on the centrifugal flow channel is discharged through the drainage groove, thereby extending the service life of the nozzle and preventing the nozzle from being blocked.

[0018] Furthermore, the electrode device includes an electrode shell and an electrode ring. The electrode shell is provided with an electrode mounting cavity. The electrode ring is placed in the electrode mounting cavity. An insulating layer is provided on the electrode ring. The insulating layer covers the non-working area of ​​the electrode ring. The working area of ​​the electrode ring is the inner surface of the electrode ring.

[0019] The electrode shell serves as the main installation base for the installation and positioning of other components. At the same time, the electrode shell protects the fragile insulating layer on the electrode ring from external impact, and also prevents dust from being adsorbed on the surface of the electrode ring. By providing an insulating layer on the electrode ring, the electrode ring only discharges to one side of the nozzle, thereby increasing the charging effect of the water droplets sprayed from the nozzle.

[0020] Furthermore, the magnetic field transmitting device is used to transmit the magnetic field.

[0021] The magnetic field emitted by the magnetic field emission device allows the charged water droplets to be accelerated and deflected by the Lorentz force. By adjusting the strength of the magnetic field emitted by the magnetic field emission device, the cooling area of ​​the water droplets on the slab is changed. By strengthening the magnetic field strength at the edge of the slab, the charged water droplets can better cool the edge of the slab.

[0022] Furthermore, the preparation process comprises the following steps:

[0023] S1. The molten casting liquid is sent to the intermediate tank through the rotary tower, and then sent to the crystallizer through the intermediate tank.

[0024] S2. The molten casting liquid is initially cooled into the required slab shape through the crystallizer, and then the cast slab is transported through the support guide rod.

[0025] S3. The slab is sent to the working area of ​​the cooling device for cooling via the supporting guide rollers.

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

[0027] 1. The cooling water is repeatedly accelerated and decelerated in the wavy upper flow channel. In the area from the crest to the trough of the upper flow channel, the water flow speed is accelerated and the pressure is reduced. In the area from the trough to the crest of the upper flow channel, the water flow speed is reduced and the pressure is increased. The change in pressure gradient causes turbulence, which accelerates the heat exchange between the water flow and the crystallizer. The turbulence formed by the high-speed cooling water in the upper flow channel quickly takes away the heat of the casting liquid in the crystallizer, avoiding the reduction of cooling effect due to excessive water temperature.

[0028] 2. The spiral lower flow channel makes the cooling water rotate continuously in the lower flow channel, thereby generating centrifugal force, which pushes the fluid to the outside of the lower flow channel through the centrifugal force, thereby generating a radial pressure gradient, causing the cooling water to generate a secondary flow, thereby forming turbulence. The turbulent flow increases the number of impacts between the cooling water and the lower flow channel, thereby enhancing the heat exchange effect of the cooling water in the lower flow channel on the crystallizer. At the same time, the spiral pitch of the lower flow channel gradually decreases, which meets the temperature distribution requirements of the slab surface temperature, which is high at the top and low at the bottom. When the cooling water at the temperature angle flows in from the second water inlet at the beginning, the cooling water at the temperature angle takes away a large amount of heat from the surface of the slab. At the same time, as the cooling water gradually flows downward, the cooling water temperature gradually increases. The heat exchange effect is enhanced by reducing the pitch distribution. At the same time, the lower heat exchange rate of the higher temperature cooling water is conducive to improving the heat distribution on the slab, thereby alleviating the local low temperature and overheating on the slab.

[0029] 3. The water mist sprayed from the cooling nozzle is charged by the electrode device, and the charge on the small water droplets forming the water mist is concentrated on the outside of the water droplets, which increases the controllability of the water droplets in the magnetic field. The charged water droplets are accelerated by the magnetic field emission device to increase the speed of the water droplets and strengthen the magnetic field at the edge of the slab, so that the water droplets can cool the edge area of ​​the slab. At the same time, the accelerated droplets can also rush through the steam film, so that the droplets can directly cool the slab. At the same time, the accelerated water droplets will also break into smaller units under high-speed impact, thereby improving the cooling effect of the droplets on the slab.

[0030] 4. By introducing high-pressure water and compressed air into the rotating column, the turbine in the rotating column rotates, and the rotation of the turbine drives the rotating column to rotate. The rotation of the rotating column drives the water delivery cavity and the centrifugal flow channel to rotate, so that the water flow in the centrifugal flow channel generates centrifugal acceleration, and the impurity particles with higher density in the water flow are centrifuged to the outside, and then discharged through the drainage trough, thereby reducing the blockage of the nozzle and improving the service life of the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 for Figure 1 Enlarged view of part A;

[0033] Figure 3 Schematic diagram of the crystallizer structure of the present invention;

[0034] Figure 4 Schematic diagram of the upper flow channel structure of the present invention;

[0035] Figure 5 is a schematic diagram of a cooling device of the present invention;

[0036] Figure 6 for Figure 5 A magnified view of a part B;

[0037] Figure 7 It is a schematic diagram of the cooling nozzle structure of the present invention;

[0038] Figure 8 for Figure 7 A magnified view of local C.

[0039] In the figure: 1. Rotating tower; 2. Intermediate tank; 3. Crystallizer; 31. First water inlet; 32. Upper flow channel; 33. First water outlet; 34. Second water inlet; 35. Lower flow channel; 36. Second water outlet; 4. Support guide roller; 5. Cooling device; 51. Support plate; 52. Connecting plate; 53. Cooling nozzle; 531. Nozzle support frame; 532. Nozzle housing; 533. Rotating column; 5331. Water supply chamber; 5332. Centrifugal flow channel; 534. Turbine; 535. Nozzle; 5351. Water inlet; 5352. Drain trough; 54. Electrode device; 541. Electrode housing; 5411. Electrode mounting chamber; 542. Electrode ring; 55. Magnetic field transmitting device. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Example: Figures 1-8 As shown, the present invention provides a slab continuous casting device with a cooling function and a preparation process technical solution thereof, the slab continuous casting device includes a rotary tower 1, an intermediate tank 2, a crystallizer 3, a support guide roller 4 and a cooling device 5, the rotary tower 1 and the intermediate tank 2 are tightly connected, the intermediate tank 2 and the crystallizer 3 are tightly connected, the intermediate tank 2 and the crystallizer 3 are communicated, the support guide roller 4 is located below the crystallizer 3, and the cooling device 5 is located in the conveying direction of the support guide roller 4.

[0042] The melted casting liquid is sent to the intermediate tank 2 through the rotary tower 1, and then sent to the crystallizer 3 through the intermediate tank 2. When the casting liquid passes through the crystallizer 3, the casting liquid is preliminarily cooled by the crystallizer 3 so that the casting liquid is cooled to the corresponding slab shape. At this time, the slab is cooled by the cooling effect of the crystallizer 3 so that the outer surface is cooled to the corresponding shape, but the internal temperature of the slab is still high. The slab is then sent to the cooling device 5 through the supporting guide roller 4 for secondary cooling, thereby quickly reducing the temperature of the slab and allowing the slab to be quickly formed.

[0043] like Figure 3-Figure 4 As shown, the crystallizer 3 is provided with a first water inlet 31, an upper flow channel 32, and a first water outlet 33. The first water inlet 31 is connected to the upper flow channel 32, and the upper flow channel 32 is connected to the first water outlet 33 at one end away from the first water inlet 31. The width of the upper flow channel 32 gradually narrows. The part of the upper flow channel 32 connected to one end of the first water inlet 31 is the widest, and the end of the upper flow channel 32 connected to the first water outlet 33 is the narrowest. The cross-sectional shape of the upper flow channel 32 is wavy.

[0044] After the casting liquid enters the crystallizer 3 through the intermediate tank 2, the high-speed cooling water used to cool the upper casting liquid flows in from the first water inlet 31, then flows through the upper flow channel 32, and finally flows out from the first water outlet 33. When the cooling water flows in the wavy upper flow channel 32, the wavy upper flow channel 32 causes the cooling water to repeatedly accelerate and decelerate in the upper flow channel 32. In the area from the crest to the trough of the upper flow channel 32, the water flow speed is accelerated and the pressure is reduced. In the area from the trough to the crest of the upper flow channel 32, the water flow speed is reduced and the pressure is increased. Turbulence is caused by the change in pressure gradient, and the heat exchange between the water flow and the crystallizer 3 is accelerated by the turbulence. The turbulence formed by the high-speed cooling water in the upper flow channel 32 quickly takes away the heat of the casting liquid in the crystallizer 3, avoiding the reduction of the cooling effect due to excessive water temperature.

[0045] like Figure 3-Figure 4 As shown, the crystallizer 3 is also provided with a second water inlet 34, a lower layer flow channel 35 and a second water outlet 36. The second water inlet 34 is connected to the lower layer flow channel 35, and the lower layer flow channel 35 is connected to the second water outlet 36 at one end away from the second water inlet 34. The lower layer flow channel 35 is spiral, and the spiral pitch of the lower layer flow channel 35 gradually decreases.

[0046] The spiral shape of the lower runner 35 changes with the shape of the crystallizer 3. When the slab enters the cooling range of the lower runner 35 from the cooling range of the upper runner 32 of the crystallizer 3, the coolant entering from the second water inlet 34 enters the lower runner 35 to cool the slab in the cooling range of the lower runner 35, and then flows out from the second water outlet 36. The cooling water rotates continuously in the lower runner 35 through the spiral lower runner 35, thereby generating centrifugal force. The centrifugal force pushes the fluid to the outside of the lower runner 35, thereby generating a radial pressure gradient, causing the cooling water to generate a secondary flow, thereby forming a turbulent flow. The number of impacts between the cooling water and the lower flow channel 35 is increased, thereby enhancing the heat exchange effect of the cooling water in the lower flow channel 35 on the crystallizer 3. At the same time, the spiral pitch of the lower flow channel 35 is gradually reduced, which meets the temperature distribution requirements of the slab surface temperature, with high temperature at the top and low temperature at the bottom. When the temperature angle cooling water flows in from the second water inlet 34 at the beginning, the temperature angle cooling water takes away a large amount of heat from the slab surface. At the same time, as the cooling water gradually flows downward, the cooling water temperature gradually increases. The heat exchange effect is enhanced by reducing the distribution of the spiral pitch. At the same time, the lower heat exchange rate of the higher temperature cooling water is conducive to improving the heat distribution on the slab, thereby alleviating the situation of local low temperature and overheating on the slab.

[0047] like Figure 1 、 Figure 2 、 Figure 5 and Figure 6As shown, the cooling device 5 includes a support plate 51, a connecting plate 52, a cooling nozzle 53, an electrode device 54 and a magnetic field emission device 55. The support plate 51 is placed on both sides of the support guide roller 4, and the connecting plate 52 is located above the support guide roller 4. The support plate 51 and the connecting plate 52 are tightly connected, the connecting plate 52 and the cooling nozzle 53 are rotatably connected, the electrode device 54 and the cooling nozzle 53 are clamped, and the magnetic field emission device 55 and the support plate 51 are tightly connected.

[0048] The support plate 51 is used as the main installation base for the installation and positioning of other components. The connecting plate 52 is installed directly above the support guide roller 4 through the support plate 51. By installing the connecting plate 52 directly above the support guide roller 4, the cooling nozzle 53 can be installed directly above the support guide roller 4. At the same time, when the side temperature of the slab is not cooled enough, a cooling nozzle 53 can be added to the side of the support plate 51 close to the slab to cool the side of the slab. When the cooling nozzle 53 cools the slab, high-pressure water and compressed air are passed into the cooling nozzle 53 so that the cooling nozzle 53 can spray droplets. The water mist sprayed from the cooling nozzle 53 is charged by the electrode device 54, and the charge on the small water droplets forming the water mist is concentrated on the outside of the water droplets, which increases the controllability of the water droplets in the magnetic field. The charged water droplets are accelerated by the magnetic field emission device 55, so that the speed of the water droplets is increased, and the magnetic field at the edge of the slab is strengthened, so that the water droplets can cool the edge area of ​​the slab. At the same time, the accelerated droplets can also rush through the steam film, so that the droplets can directly cool the slab. At the same time, the accelerated water droplets will also break into smaller units under high-speed impact, thereby improving the cooling effect of the droplets on the slab.

[0049] like Figure 6 and Figure 7 As shown, the cooling nozzle 53 includes a nozzle support frame 531, a nozzle housing 532, a rotating column 533, a turbine 534 and a nozzle 535. The nozzle support frame 531 and the nozzle housing 532 are tightly connected, the nozzle housing 532 and the nozzle 535 are connected, the rotating column 533 and the turbine 534 are connected, a rotating column 533 is provided in the nozzle housing 532, the rotating column 533 and the nozzle housing 532 are rotatably connected, a water supply chamber 5331 and a centrifugal flow channel 5332 are provided on the rotating column 533, the turbine 534 is placed in the water supply chamber 5331, the turbine 534 and the water supply chamber 5331 are tightly connected, the water supply chamber 5331 and the centrifugal flow channel 5332 are communicated, and the centrifugal flow channel 5332 and the nozzle 535 are communicated.

[0050] The nozzle support frame 531 serves as the main installation base for the installation and positioning of other equipment. At the same time, the nozzle housing 532 provides an installation position for other components. By introducing high-pressure water and compressed air into the rotating column 533, the turbine 534 in the rotating column 533 rotates. The rotation of the turbine 534 drives the rotating column 533 to rotate. The rotation of the rotating column 533 drives the water delivery chamber 5331 and the centrifugal flow channel 5332 to rotate, so that the water flow in the centrifugal flow channel 5332 generates centrifugal acceleration, centrifuging the impurity particles with higher density in the water flow to the outside and then discharging them.

[0051] like Figure 7 and Figure 8 As shown, a water inlet hole 5351 and a drainage groove 5352 are provided on the nozzle 535 . The water inlet hole 5351 is communicated with the centrifugal flow channel 5332 , and the drainage groove 5352 is communicated with the centrifugal flow channel 5332 .

[0052] The water flow after centrifugation through the centrifugal flow channel 5332 enters through the water inlet hole 5351 and is then ejected. The water flow with impurities on the centrifugal flow channel 5332 is discharged through the drainage groove 5352, thereby extending the service life of the nozzle 535 and preventing the nozzle 535 from being blocked.

[0053] like Figure 6 and Figure 7 As shown, the electrode device 54 includes an electrode shell 541 and an electrode ring 542. The electrode shell 541 is provided with an electrode mounting cavity 5411. The electrode ring 542 is placed in the electrode mounting cavity 5411. An insulating layer is provided on the electrode ring 542. The insulating layer covers the non-working area of ​​the electrode ring 542. The working area of ​​the electrode ring 542 is the inner surface of the electrode ring 542.

[0054] The electrode shell 541 serves as the main installation base for the installation and positioning of other components. At the same time, the electrode shell 541 protects the fragile insulating layer on the electrode ring 542 from external impact, and also prevents dust from being adsorbed on the surface of the electrode ring 542. By providing an insulating layer on the electrode ring 542, the electrode ring 542 only discharges to one side of the nozzle 535, thereby increasing the charging effect of the water droplets sprayed from the nozzle 535.

[0055] like Figure 5 As shown, the magnetic field transmitting device 55 is used to transmit the magnetic field.

[0056] The magnetic field emitted by the magnetic field emitting device 55 allows the charged water droplets to be accelerated and deflected by the Lorentz force. By adjusting the strength of the magnetic field emitted by the magnetic field emitting device 55, the cooling area of ​​the water droplets on the slab is changed. By strengthening the magnetic field strength at the edge of the slab, the charged water droplets can have a better cooling effect on the edge of the slab.

[0057] like Figures 1-8As shown, the preparation process includes the following steps:

[0058] S1. The molten casting liquid is sent to the intermediate tank 2 through the rotary tower 1, and then sent to the crystallizer 3 through the intermediate tank 2.

[0059] S2. The molten casting liquid is initially cooled into the required slab shape through the crystallizer 3, and then the cast slab is transported through the support guide rod 4.

[0060] S3. The slab is sent to the working area of ​​the cooling device 5 through the supporting guide rollers 4 for cooling.

[0061] The working principle of the present invention is as follows: after the casting liquid enters the crystallizer 3 through the intermediate tank 2, the high-speed cooling water used to cool the upper casting liquid flows in from the first water inlet 31, then flows through the upper runner 32, and finally flows out from the first water outlet 33. When the cooling water flows in the wavy upper runner 32, the wavy upper runner 32 causes the cooling water to repeatedly accelerate and decelerate in the upper runner 32, forming turbulence. The turbulence accelerates the heat exchange between the water flow and the crystallizer 3. When the slab enters the cooling range of the upper runner 32 of the crystallizer 3 into the cooling range of the lower runner 35, the cooling liquid entering from the second water inlet 34 passes through the spiral lower runner 35, causing the cooling water to continuously rotate in the lower runner 35, thereby generating centrifugal force, causing the cooling water to generate secondary flow, thereby forming turbulence. The turbulent flow increases the number of impacts between the cooling water and the lower runner 35, thereby increasing the lower runner The cooling water in the laminar flow channel 35 has a heat exchange effect on the crystallizer 3, and the spiral pitch of the lower layer flow channel 35 gradually decreases, which meets the temperature distribution requirement of the slab surface temperature being high at the top and low at the bottom. When the slab enters the cooling range of the cooling device 5, high-pressure water and compressed air are introduced into the cooling nozzle 53, so that the cooling nozzle 53 can spray droplets. The water mist sprayed by the cooling nozzle 53 is charged by the electrode device 54, and the charge on the small water droplets forming the water mist is concentrated on the outside of the water droplets, so that the controllability of the water droplets in the magnetic field is increased. The charged water droplets are accelerated by the magnetic field emission device 55, so that the speed of the water droplets is increased, and the magnetic field at the edge of the slab is strengthened, so that the water droplets can cool the edge area of ​​the slab. At the same time, the accelerated droplets can also rush through the steam film, so that the droplets can directly cool the slab. At the same time, the accelerated water droplets will also break into smaller units under high-speed impact, thereby improving the cooling effect of the droplets on the slab.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A slab continuous casting device with cooling function, characterized in that: The continuous casting device comprises a rotary tower (1), an intermediate tank (2), a crystallizer (3), a supporting guide roller (4) and a cooling device (5); the rotary tower (1) and the intermediate tank (2) are tightly connected; the intermediate tank (2) and the crystallizer (3) are tightly connected; the intermediate tank (2) and the crystallizer (3) are communicated; the supporting guide roller (4) is located below the crystallizer (3); and the cooling device (5) is located in the conveying direction of the supporting guide roller (4).

2. The slab continuous casting device with cooling function according to claim 1, characterized in that: The crystallizer (3) is provided with a first water inlet (31), an upper flow channel (32), and a first water outlet (33); the first water inlet (31) and the upper flow channel (32) are connected; an end of the upper flow channel (32) away from the first water inlet (31) is connected to the first water outlet (33); the width of the upper flow channel (32) gradually narrows; a portion of the upper flow channel (32) connected to one end of the first water inlet (31) is the widest; an end of the upper flow channel (32) connected to the first water outlet (33) is the narrowest; and a cross-sectional shape of the upper flow channel (32) is wavy.

3. The slab continuous casting device with cooling function according to claim 2, characterized in that: The crystallizer (3) is further provided with a second water inlet (34), a lower layer flow channel (35) and a second water outlet (36); the second water inlet (34) and the lower layer flow channel (35) are in communication; an end of the lower layer flow channel (35) away from the second water inlet (34) is in communication with the second water outlet (36); the lower layer flow channel (35) is spiral-shaped, and the spiral pitch of the lower layer flow channel (35) gradually decreases.

4. The slab continuous casting device with cooling function according to claim 1, characterized in that: The cooling device (5) comprises a support plate (51), a connecting plate (52), a cooling nozzle (53), an electrode device (54) and a magnetic field emission device (55), wherein the support plate (51) is placed on both sides of the support guide roller (4), the connecting plate (52) is located above the support guide roller (4), the support plate (51) and the connecting plate (52) are fastened together, the connecting plate (52) and the cooling nozzle (53) are rotatably connected, the electrode device (54) and the cooling nozzle (53) are snap-fitted, and the magnetic field emission device (55) and the support plate (51) are fastened together.

5. The slab continuous casting device with cooling function according to claim 4, characterized in that: The cooling nozzle (53) includes a nozzle support frame (531), a nozzle housing (532), a rotating column (533), a turbine (534) and a nozzle (535), wherein the nozzle support frame (531) and the nozzle housing (532) are fastened together, the nozzle housing (532) and the nozzle (535) are connected, the rotating column (533) and the turbine (534) are connected, and the rotating column (533) is provided in the nozzle housing (532). The rotating column (533) and the nozzle housing (532) are rotatably connected. A water supply chamber (5331) and a centrifugal flow channel (5332) are provided on the rotating column (533). The turbine (534) is placed in the water supply chamber (5331). The turbine (534) and the water supply chamber (5331) are tightly connected. The water supply chamber (5331) and the centrifugal flow channel (5332) are in communication, and the centrifugal flow channel (5332) and the nozzle (535) are in communication.

6. The slab continuous casting device with cooling function according to claim 5, characterized in that: The nozzle (535) is provided with a water inlet hole (5351) and a drainage groove (5352); the water inlet hole (5351) is in communication with the centrifugal flow channel (5332); and the drainage groove (5352) is in communication with the centrifugal flow channel (5332).

7. The slab continuous casting device with cooling function according to claim 6, characterized in that: The electrode device (54) comprises an electrode shell (541) and an electrode ring (542); the electrode shell (541) is provided with an electrode mounting cavity (5411); the electrode ring (542) is placed in the electrode mounting cavity (5411); an insulating layer is provided on the electrode ring (542); the insulating layer covers a non-working area of ​​the electrode ring (542); and the working area of ​​the electrode ring (542) is the inner surface of the electrode ring (542).

8. The slab continuous casting device with cooling function according to claim 4, characterized in that: The magnetic field transmitting device (55) is used to transmit a magnetic field.

9. The process for preparing a slab continuous casting device with a cooling function according to claim 1, characterized in that: The preparation process comprises the following steps: S1, the molten casting liquid is sent to the intermediate tank (2) through the rotary tower (1), and then the casting liquid is sent to the crystallizer (3) through the intermediate tank (2); S2, preliminarily cooling the molten casting liquid into the required slab shape through the crystallizer (3), and then conveying the cast slab through the supporting guide roller (4); S3. The slab is sent to the working area of ​​the cooling device (5) through the supporting guide roller (4) for cooling.

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