A streamlined vibration quenching nucleation device and operation method

Abstract

The present invention relates to a streamlined vibration quenching nucleation device and operation method, the device comprising: a crystallizer, arranged below an immersed water inlet at the bottom of an external tundish; a liquid metal cooling pool arranged on the side of the crystallizer; a cooling fan arranged on the side of the liquid metal cooling pool, thereby cooling the liquid metal cooling pool; a quenching nucleator arranged inside the crystallizer and connected with the liquid metal cooling pool, the quenching nucleator being streamlined; a cooling pipeline arranged between the liquid metal cooling pool and the quenching nucleator; a variable frequency pump arranged in the cooling pipeline; a vibration generator sleeved in the cooling pipeline and arranged between the variable frequency pump and the quenching nucleator; a baffle assembly arranged inside the quenching nucleator. The present invention sets the quenching nucleator to a streamlined shape, reduces the thickness of the solidified structure on the surface of the quenching nucleator, promotes the peeling of the crystal nucleus and the melting of the dendrite, increases the number of equiaxed crystal nucleus particles, and improves the internal quality of large continuous casting billets.

Description

Technical Field

[0001] The invention relates to the technical field of large-size continuous casting billet production, and in particular to a streamlined vibration chilling nucleation device and an operating method. Background Art

[0002] The continuous casting method has the advantages of high production efficiency, low energy consumption, high degree of mechanization and automation, high metal recovery rate and high yield rate in the field of large-scale steel production. The continuous casting process directly affects the performance and quality of the final steel billet. Therefore, the continuous casting process occupies a major position in today's steel production and manufacturing.

[0003] With the advancement of production technology and the gradual change of industrial demand, the size of the continuous casting billets produced and processed nowadays has increased, and the cross-section of the billets has also increased accordingly, which makes the cooling effect of the billet surface on the inside of the billet weaker, and the cooling speed inside the billet slows down, resulting in a large number of columnar crystals inside. The produced billets will have internal quality problems such as center segregation, center porosity, center shrinkage and center cracks, which seriously affect the internal quality of the billet.

[0004] Since columnar crystals are directional, if excessive columnar crystals are produced inside the produced steel billet, it will cause cracks during reheating, which will seriously reduce the strength and quality of the steel. Therefore, reducing the content of columnar crystals, increasing the content of equiaxed crystals, and promoting the transformation of columnar crystals to equiaxed crystals are important methods to improve the quality of the ingot. At present, the main improvement methods include electromagnetic stirring, low superheat casting, cooling water nozzles, improving the quality of molten steel, and using steel belt feeding technology. However, the above complex technical changes have put forward a high level of quality for enterprises and employees. From the perspective of process feasibility, improvement effect and economic benefits, applying vibration to the nucleator to promote the generation of equiaxed crystals is an effective means to solve the internal quality problems of large-scale continuous casting billets.

[0005] However, in the prior art, patent CN202410428439.8 proposes a vibration quenching nucleation device, which can cool the metal inside the casting pool from the center through a homogeneous quenching nucleation rod, but this patent is mainly used for die-cast billets, and the removal of the nucleation rod in the later stage of solidification will stir the flow field inside the molten steel and cause segregation. The content of equiaxed crystals formed only by vibration dendrite fracture is also relatively low. Patent CN202110544104.9 proposes a method for determining the process parameters of the continuous casting feeding steel strip by a low superheat isothermal eutectic method. This patent mainly uses the cold steel strip itself to reduce the temperature inside the billet, and cannot apply continuous cooling to the molten steel inside the continuous casting billet.

[0006] To this end, the present invention provides a streamlined vibration quenching nucleation device and an operating method. Summary of the invention

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a streamlined vibration quenching nucleation device and operation method, thereby solving the technical problem that the prior art cannot continuously apply vibration and cooling to the molten steel inside a large continuous casting billet, resulting in a low equiaxed crystal ratio, thereby causing internal quality defects such as partial looseness, shrinkage holes, cracks, and resulting in low mechanical and corrosion resistance of the billet.

[0008] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a streamlined vibration quenching nucleation device, which includes: a crystallizer, arranged below the immersed water inlet at the bottom of the external ladle; a liquid metal cooling pool, arranged on the side of the crystallizer; a cooling fan, arranged on the side of the liquid metal cooling pool, thereby cooling the liquid metal cooling pool; a quenching nucleator, arranged inside the crystallizer and connected to the liquid metal cooling pool, the quenching nucleator is streamlined; a cooling pipeline, arranged between the liquid metal cooling pool and the quenching nucleator; a variable frequency pump, arranged in the cooling pipeline and connected to the cooling pipeline; a vibration generator, sleeved on the cooling pipeline, and arranged between the variable frequency pump and the quenching nucleator; a baffle assembly, arranged inside the quenching nucleator.

[0009] Optionally, the baffle assembly includes: a baffle, which is arranged inside the chilled nucleator and connected to the inner wall of the chilled nucleator; and a baffle plate, which is arranged between the inner wall of the chilled nucleator and the baffle, and connected to the inner wall of the chilled nucleator.

[0010] Optionally, the limiting assembly is arranged on the pipe wall of the cooling pipe and connected to the pipe wall of the cooling pipe.

[0011] Optionally, the limit assembly includes: a lifter, which is arranged above the cooling pipeline and connected to the cooling pipeline; and a movable limiter, which is arranged on the side wall of the crystallizer and connected to the cooling pipeline.

[0012] Optionally, the vibration generator and the cooling pipeline are connected in a non-rigid manner, so that the vibration generator drives the quenching nucleator to vibrate through the cooling pipeline.

[0013] Optionally, the quench nucleator is arranged just below the submerged nozzle at the bottom of the external tundish.

[0014] Optionally, the quenching nucleator is arranged symmetrically along the axis of the submerged nozzle.

[0015] Optionally, the cooling pipelines are arranged symmetrically along the axis of the immersion nozzle.

[0016] The second aspect of the present invention also provides an operating method of a streamlined vibration quenching nucleation device, the operating method comprising:

[0017] S1: The quenching nucleator is connected to the cooling pipeline, and the variable frequency pump is turned on to pump low-temperature liquid metal into the quenching nucleator until the air in the quenching nucleator is exhausted;

[0018] S2: connecting the limiting assembly with the cooling pipeline to limit the position of the quenching nucleator, and placing the quenching nucleator below the immersion nozzle;

[0019] S3: Vibration is applied to the cooling pipeline through a vibration generator, thereby driving the quenching nucleator to vibrate, and the immersion water inlet is opened to introduce molten steel into the crystallizer. The size and dispersion range of the equiaxed crystals are guaranteed by adjusting the vibration frequency and amplitude;

[0020] S4: A variable frequency pump is used to control the flow rate of the low-temperature liquid metal, and a cooling fan is used to control the temperature of the liquid metal cooling pool, thereby regulating the cooling rate and circulation rate of the low-temperature liquid metal. A baffle assembly is provided to control the flow route of the cooled low-temperature liquid metal, thereby ensuring the size and nucleation rate of the equiaxed crystals.

[0021] S5: After the continuous casting process is completed, the quenching nucleator is taken out, and high-temperature inert gas is continuously introduced into the quenching nucleator until the low-temperature liquid metal in the quenching nucleator is completely discharged.

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides a streamlined vibration quenching nucleation device. By arranging a cooling fan and a liquid metal cooling pool, and connecting with a quenching nucleator through a cooling pipeline, continuous cooling of the molten steel inside the crystallizer is achieved, a low-temperature cold source is provided for the inside of the crystallizer, and the formation of dendrites on the surface of the quenching nucleator is promoted; combined with a frequency converter and a vibration generator arranged on the cooling pipeline, the dendrites attached to the quenching nucleator are caused to fuse to form new equiaxed crystals, thereby increasing the number of equiaxed crystals; the vibration generator also promotes the dispersion distribution of equiaxed crystals in the crystallizer, so that the equiaxed crystals are more evenly distributed in the ingot, further making the grain size inside the ingot more uniform, thereby improving the internal quality of large continuous casting ingots.

[0024] Furthermore, the chill nucleator is streamlined, which reduces the thickness of the solidified structure on the surface of the chill nucleator. Since the molten steel flows more compactly on the outer surface of the streamlined chill nucleator, the high-speed jet from the immersed nozzle flows along the surface of the chill nucleator, which promotes the peeling of the crystal nucleus and the melting of the dendrites, and increases the number of equiaxed crystal nucleation particles. At the same time, due to the streamlined characteristics of the chill nucleator, the flow boundary layer is thinner, thereby reducing the thickness of the solidified structure on the surface of the chill nucleator, thereby improving the heat transfer coefficient, thereby improving the heat exchange efficiency between the chill nucleator and the molten steel. The combined effect of dendrite fracture on the surface of the quenching nucleator and the dispersion effect caused by the vibration generator can significantly increase the equiaxed crystal content in the crystallizer and improve the probability of equiaxed crystals being captured by columnar crystals. The uniform growth rate during the formation of equiaxed crystals is conducive to uniform distribution of solute elements and more uniform heat transfer. At the same time, the material properties formed by equiaxed crystals are more stable than those of columnar crystals, which is conducive to effectively inhibiting or eliminating internal defects such as central segregation, looseness, and cracks in the ingot, effectively improving the internal quality of the ingot.

[0025] Furthermore, by arranging a baffle assembly inside the quenching nucleator, the flow path of the cooled low-temperature liquid metal can be effectively controlled, so that the cooled low-temperature liquid metal flows closely to the inner wall surface of the quenching nucleator, thereby strengthening heat convection, enhancing heat transfer effect and efficiency, and also helping to suppress or eliminate internal defects such as central segregation, looseness, and cracks in the ingot, ultimately increasing the content of equiaxed crystals and improving the internal quality of large continuous casting ingots. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a streamlined vibration quenching nucleation device of the present invention;

[0027] Figure 2 It is a schematic flow chart of the operation method of the streamlined vibration quenching nucleation device of the present invention.

[0028] Description of reference numerals:

[0029] 1. Quenching nucleator; 2. Immersed nozzle; 3. Liquid metal cooling pool; 4. Vibration generator; 5. Cooling fan; 6. Frequency conversion pump; 7. Valve; 8. Lifter; 9. Crystallizer; 10. Movable limiter; 11. Block; 12. Baffle; 13. Cooling pipeline. DETAILED DESCRIPTION

[0030] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0031] Embodiment:

[0032] The embodiment of the present invention provides a streamlined vibration quenching nucleation device, such as Figure 1 As shown, it includes: a crystallizer 9, which is arranged below the submerged water inlet 2 at the bottom of the external tundish; a liquid metal cooling pool 3, which is arranged on the side of the crystallizer 9; a cooling fan 5, which is arranged on the side of the liquid metal cooling pool 3, thereby cooling the liquid metal cooling pool 3; a quenching nucleator 1, which is arranged inside the crystallizer 9 and is connected with the liquid metal cooling pool 3, and the quenching nucleator 1 is streamlined; a cooling pipeline 13, which is arranged between the liquid metal cooling pool 3 and the quenching nucleator 1; a variable frequency pump 6, which is arranged in the cooling pipeline 13 and is connected with the cooling pipeline 13; a vibration generator 4, which is sleeved on the cooling pipeline 13 and arranged between the variable frequency pump 6 and the quenching nucleator 1; a baffle assembly, which is arranged inside the quenching nucleator 1.

[0033] Exemplarily, the submerged water inlet 2 is fixed to the bottom of the tundish and then arranged above the crystallizer 9, and inserted below the steel liquid level in the crystallizer 9, and provides a high-speed jet to the surface of the quenching nucleator 1 to improve the cooling effect on the liquid core of the ingot; the liquid metal cooling pool 3 is arranged on the side of the crystallizer 9 and fixed on the ground, and is connected to the crystallizer 9 through the cooling pipe 13; the cooling fan 5 is fixedly arranged on the side of the liquid metal cooling pool 3 to cool the liquid metal cooling pool 3.

[0034] For example, in this embodiment, the material of the chilling nucleator 1 is the same as that of the continuous casting billet, thereby reducing the content of foreign elements and the mixing of impurities, thereby preventing the impurity contamination of the continuous casting billet caused by the trace melting of the chilling nucleator 1 itself, which is beneficial to improving the internal quality of large continuous casting billets.

[0035] Exemplarily, the cooling pipeline 13 mainly includes two pipelines, one of which is an inlet pipeline for providing cooled liquid metal, and the other is an outlet pipeline for providing liquid metal after passing through the chilling nucleator 1 for circulation, thereby realizing the continuous provision of cooled low-temperature liquid metal, continuously cooling the molten steel at low temperature through the chilling nucleator 1, enhancing the heat exchange effect and heat exchange efficiency between the chilling nucleator 1 and the molten steel, thereby improving the nucleation efficiency of the chilling nucleator, and facilitating increasing the content of equiaxed crystals.

[0036] Exemplarily, the limiting assembly in this embodiment is connected to both cooling pipes 13. Since both the inlet pipe and the outlet pipe are connected to the quenching nucleator 1, the positions of the two cooling pipes 13 are limited by the limiting assembly, thereby limiting the position of the quenching nucleator 1 in the crystallizer 9.

[0037] Illustratively, the chilled nucleator 1 in this embodiment has cooled low-temperature liquid metal passing through it, which can maintain the surface temperature of the chilled nucleator 1 at 200°C-1500°C, so as to promote the chilled nucleation and dendrite growth of the high-temperature molten metal on the surface of the chilled nucleator 1, and prevent the chilled nucleator 1 itself from melting and causing damage to the equipment.

[0038] Illustratively, the low-temperature liquid metal in this embodiment has the characteristics of strong thermal conductivity, large specific heat capacity, good self-healing ability, and is not easy to vaporize. If the cooling pipeline 13 is damaged, it will solidify and seal at the damaged part. There is no need to worry about vaporization caused by the breakage of the cooling pipeline 13, which effectively avoids causing an explosion and ensures the safe use of the streamlined vibration quenching nucleation device.

[0039] In a possible embodiment, Figure 1 As shown, the baffle assembly includes: a baffle 11, which is arranged inside the quenching nucleator 1 and connected to the inner wall of the quenching nucleator 1; a baffle plate 12, which is arranged between the inner wall of the quenching nucleator 1 and the baffle 11, and connected to the inner wall of the quenching nucleator 1.

[0040] Exemplarily, in this embodiment, a baffle 12 is arranged inside the quench nucleator 1 by welding or bolting, so that the cooled low-temperature liquid metal flows from bottom to top along the wall through the entire interior of the quench nucleator 1, so that the internal flow boundary layer between the low-temperature liquid metal and the streamlined quench nucleator 1 is thinned, thereby increasing the heat transfer coefficient, improving the heat transfer amount and heat transfer efficiency between the low-temperature condensed metal and the streamlined quench nucleator 1, and enhancing the heat transfer effect.

[0041] Exemplarily, in this embodiment, a stopper 11 is provided inside the chilled nucleator 1 by welding or bolting, so as to occupy a position in the middle of the interior of the chilled nucleator 1. The stopper 11 is torpedo-shaped, thereby preventing the cooled low-temperature liquid metal from flowing to the middle of the interior of the chilled nucleator 1, which is conducive to the cooled low-temperature liquid metal flowing to the inner wall surface of the chilled nucleator 1, thereby enhancing the heat exchange effect and efficiency.

[0042] In a possible embodiment, Figure 1 As shown, the limiting assembly is arranged on the pipe wall of the cooling pipe 13 and connected to the pipe wall of the cooling pipe 13 .

[0043] Illustratively, in this embodiment, the cooling line 13 and the chilling nucleator 1 are adjusted and fixed in position by a limiting assembly, and the limiting assembly is fixed on the outside of the tube wall of the cooling line 13. After being fixed, the cooling line 13 and the chilling nucleator 1 cannot move horizontally to a large extent, while allowing the chilling nucleator 1 to vibrate longitudinally and vibrate laterally with low amplitude, which is beneficial to control the position of condensation of the chilling nucleator 1, that is, the position where equiaxed crystals are formed, thereby further optimizing the internal quality of the ingot.

[0044] In a possible embodiment, Figure 1 As shown, the limiter assembly includes: a lifter 8, which is arranged above the cooling pipeline 13 and connected to the cooling pipeline 13; and a movable limiter 10, which is arranged on the side wall of the crystallizer 9 and connected to the cooling pipeline 13.

[0045] Exemplarily, the lifter 8 moves the chilled nucleator 1 to the initial position before the continuous casting process begins. During the continuous casting process, the working position of the chilled nucleator 1 is fine-tuned according to the collected monitoring data, thereby adjusting the position of the chilled nucleator 1 in the crystallizer 9 and changing the cooling position inside the molten steel, thereby facilitating obtaining a better nucleation effect.

[0046] Exemplarily, the movable limiter 10 is mainly used to fix the cooling pipeline 13 after the lifter 8 is adjusted, so as to fix the position of the quenching nucleator 1 inside the crystallizer 9, thereby controlling the position of condensation, that is, the position of equiaxed crystal formation, and after fixing, the quenching nucleator 1 is not allowed to make a large horizontal movement, thereby controlling the position of condensation, that is, the position of equiaxed crystal formation is well controlled, thereby further optimizing the internal quality of the ingot.

[0047] In a possible embodiment, Figure 1 As shown, the vibration generator 4 and the cooling pipeline 13 are non-rigidly connected, so that the vibration generator 4 drives the quenching nucleating device 1 to vibrate through the cooling pipeline 13 .

[0048] For example, since the vibration generator 4 and the cooling pipeline 13 are non-rigidly connected, there is a certain gap between the vibration generator 4 and the cooling pipeline 13 in the case of non-rigid connection, allowing the vibration generator 4 to drive the rigid cooling pipeline 13 to vibrate, so as to adjust the insertion depth of the quenching nucleator 1 in the crystallizer 9. At the same time, according to the situation, the frequency and amplitude of the vibration of the vibration generator 4 can be adjusted by controlling the needs to achieve the purpose of increasing the equiaxed crystal content, refining the equiaxed crystal size, and strengthening the dispersion effect of the equiaxed crystal.

[0049] In a possible embodiment, Figure 1 As shown, the quenching nucleator 1 is arranged just below the submerged water inlet 2 at the bottom of the external tundish.

[0050] Illustratively, the quenching nucleator 1 of the present embodiment is arranged directly below the submerged water nozzle 2, and the high-speed jet generated from the submerged water nozzle 2 flows directly to the surface of the quenching nucleator 1, thereby improving the cooling effect on the liquid core of the ingot, promoting the peeling of the nuclei of equiaxed crystals and the melting of dendrites, increasing the number of equiaxed crystal nucleation points, and optimizing the quality of the ingot.

[0051] In a possible embodiment, Figure 1 As shown, the quenching nucleator 1 is symmetrically arranged along the axis of the immersion nozzle 2.

[0052] For example, since the quenching nucleator 1 is symmetrically arranged along the axis of the submerged water nozzle 2, the flow field inside the crystallizer 9 is symmetrically distributed, thereby improving the uniformity of the distribution of the solidification structure of equiaxed crystals and columnar crystals, and is beneficial to weaken or eliminate segregation, which is beneficial to improving the mechanical, corrosion resistance and other properties of the ingot.

[0053] In a possible embodiment, Figure 1 As shown, the cooling pipeline 13 is symmetrically arranged along the axis of the submerged water nozzle 2.

[0054] For example, since the cooling pipe 13 is symmetrically arranged along the axis of the submerged nozzle 2, the liquid metal inside the quenching nucleator 1 is symmetrically cooled through the symmetrically arranged cooling pipe 13, and the same low temperature can be continuously maintained on the outer surface of the quenching nucleator 1, thereby improving the uniformity of the solidification structure distribution, and is conducive to weakening or eliminating segregation, and is conducive to improving the mechanical, corrosion resistance and other properties of the ingot.

[0055] This embodiment also provides a streamlined vibration quenching nucleation device operation method, such as Figure 2 As shown, the operation method includes:

[0056] S1: The quenching nucleating device 1 is connected to the cooling pipeline 13, the valve 7 between the liquid metal cooling pool 3 and the cooling pipeline 13 is opened, and the variable frequency pump 6 is turned on to pump low-temperature liquid metal into the quenching nucleating device 1 until the air in the quenching nucleating device 1 is exhausted;

[0057] S2: Use the limiting component to connect with the cooling pipeline 13, thereby limiting the position of the quenching nucleating device 1, and placing the quenching nucleating device 1 below the immersion nozzle 2;

[0058] S3: applying vibration to the cooling pipe 13 through the vibration generator 4 to drive the quenching nucleator 1 to vibrate, and opening the immersion water inlet 2 to pass the molten steel into the interior of the crystallizer 9, and by adjusting the vibration frequency and amplitude, the size and dispersion range of the equiaxed crystals are guaranteed;

[0059] S4: According to the monitoring technology means of the prior art, the monitoring data of the continuous casting machine is collected, and according to the monitoring data of the continuous casting machine, the flow rate of the low-temperature liquid metal is controlled by the variable frequency pump 6, and the temperature of the liquid metal cooling pool 3 is controlled by the cooling fan 5, so as to adjust the cooling rate and circulation rate of the low-temperature liquid metal, and the flow blocking component is set to control the flow route of the cooled low-temperature liquid metal, so as to ensure the size and nucleation rate of the equiaxed crystal;

[0060] S5: After the continuous casting process is completed, the quenching nucleating device 1 is taken out, and a high-temperature inert gas is continuously introduced into the quenching nucleating device 1 until the low-temperature liquid metal in the quenching nucleating device 1 is completely exhausted.

[0061] The operation method of the streamlined vibration quenching nucleation device in this embodiment can realize continuous cooling of the molten steel inside the crystallizer 9, provide a low-temperature cold source inside the crystallizer 9, and promote the formation of dendrites on the surface of the quenching nucleator 1. The vibration generator 4 will promote the melting of the dendrites attached to the quenching nucleator 1 to form new equiaxed crystals; the vibration generator 4 promotes the equiaxed crystals formed by melting to be thrown away from the quenching nucleator 1, so that the equiaxed crystals are dispersed and distributed in the crystallizer 9, and promote the columnar crystals to capture the equiaxed crystals, and obtain the appropriate size and dispersion range of the equiaxed crystals, thereby promoting the transformation of the columnar crystals to the equiaxed crystals, and then combined with the variable frequency pump 6 and the vibration generator 4 set on the cooling pipeline 13, the variable frequency pump 6 is used to control the flow rate of pumping the low-temperature liquid metal according to the monitoring data, and the cooling fan 5 is used to control the temperature of the liquid metal cooling pool 3, thereby regulating the cooling rate and circulation rate of the low-temperature liquid metal. In addition, by arranging a baffle assembly inside the quenching nucleator 1, the flow path of the cooled low-temperature liquid metal can be effectively controlled, so that the cooled low-temperature liquid metal flows closely to the inner wall surface of the quenching nucleator 1, thereby strengthening heat convection, enhancing heat transfer effect and heat transfer efficiency, and being conducive to obtaining a suitable equiaxed crystal size and nucleation rate, and ultimately increasing the number of equiaxed crystals.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A streamlined vibration quenching nucleation device, characterized in that: include: A crystallizer, which is arranged below the submerged water inlet at the bottom of the external tundish; A liquid metal cooling pool is arranged on the side of the crystallizer; A cooling fan is arranged on the side of the liquid metal cooling pool to cool the liquid metal cooling pool; A chilling nucleator is arranged inside the crystallizer and is connected to the liquid metal cooling pool. The chilling nucleator is streamlined. A cooling pipeline is arranged between the liquid metal cooling pool and the quenching nucleator; A variable frequency pump is arranged in the cooling pipeline and is connected with the cooling pipeline; A vibration generator, which is sleeved on the cooling pipeline and arranged between the variable frequency pump and the quenching nucleating device; A baffle assembly is arranged inside the quenching nucleator; The baffle assembly comprises: A stopper is arranged inside the chilled nucleating device and connected to the inner wall of the chilled nucleating device; The baffle is arranged between the inner wall of the quenching nucleator and the stopper, and is connected to the inner wall of the quenching nucleator.

2. The streamlined vibration quenching nucleation device according to claim 1, characterized in that: Also includes: The limiting component is arranged on the pipe wall of the cooling pipeline and connected to the pipe wall of the cooling pipeline.

3. The streamlined vibration quenching nucleation device according to claim 2, characterized in that: The limiting component comprises: A lifter is arranged above the cooling pipeline and connected to the cooling pipeline; A movable stopper is arranged on the side wall of the crystallizer and connected to the cooling pipeline.

4. The streamlined vibration quenching nucleation device according to claim 1, characterized in that: The vibration generator and the cooling pipeline are connected in a non-rigid manner, so that the vibration generator drives the quenching nucleator to vibrate through the cooling pipeline.

5. The streamlined vibration quenching nucleation device according to claim 1, characterized in that: The quenching nucleator is arranged directly below the immersion nozzle.

6. The streamlined vibration quenching nucleation device according to claim 5, characterized in that: The quenching nucleator is symmetrically arranged along the axis of the submerged nozzle.

7. The streamlined vibration quenching nucleation device according to claim 6, characterized in that: The cooling pipelines are symmetrically arranged along the axis of the submerged water nozzle.

8. A streamlined vibration quenching nucleation device operating method, characterized in that: The operating method comprises the streamlined vibration quenching nucleation device as claimed in claim 2, and the operating method comprises: S1: the chilled nucleating device is connected to the cooling pipeline, and the variable frequency pump is turned on to pump low-temperature liquid metal into the chilled nucleating device until the air in the chilled nucleating device is exhausted; S2: connecting the limiting assembly with the cooling pipeline to limit the position of the quenching nucleator, and placing the quenching nucleator below the immersion nozzle; S3: applying vibration to the cooling pipeline through the vibration generator, thereby driving the quenching nucleator to vibrate, and opening the immersion water inlet to introduce molten steel into the interior of the crystallizer, and ensuring the size and dispersion range of equiaxed crystals by adjusting the vibration frequency and amplitude; S4: using the variable frequency pump to control the flow rate of the low-temperature liquid metal, using the cooling fan to control the temperature of the liquid metal cooling pool, thereby regulating the cooling rate and circulation rate of the low-temperature liquid metal, and the baffle assembly is set to control the flow route of the cooled low-temperature liquid metal to ensure the size and nucleation rate of the equiaxed crystal; S5: After the continuous casting process is completed, the chilled nucleator is taken out, and a high-temperature inert gas is continuously introduced into the chilled nucleator until the low-temperature liquid metal in the chilled nucleator is completely exhausted.

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