Continuous casting down-drawing crystallization device for preparing high-quality alloy material

Abstract

The invention belongs to the technical field of leading-out crystallizers, and particularly relates to a continuous casting down-leading crystallization device for preparing high-quality alloy materials, which comprises a fixed cover plate and a first leading-out pipe, the first leading-out pipe is arranged on the bottom end face of the fixed cover plate, and an electromagnetic stirrer is arranged on the upper end face of the fixed cover plate. An inner wall pipe is arranged between the electromagnetic stirrer and the first outlet pipe, a copper sleeve is arranged outside the inner wall pipe and in the first outlet pipe, a first flowing cavity is formed outside the copper sleeve and in the first outlet pipe, a first water cooling assembly is arranged outside the first flowing cavity, and a second outlet pipe is arranged below the first outlet pipe. A second water cooling assembly is arranged in the second outlet pipe; by adopting a novel lower extraction method, large-scale production treatment of the casting blank can be completed, through arrangement of structures such as the electromagnetic stirrer, the inner wall pipe and the first water cooling assembly, the problems that internal elements of the casting blank are not uniformly distributed, the surface is prone to oxidation cracking and the like can be solved, and the forming quality of the casting blank is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lead-out crystallizers, and in particular relates to a continuous casting lower lead-out crystallizer for preparing high-quality alloy materials. Background Art

[0002] The crystallizer is one of the key equipment in the metal casting process, which is mainly used to cool and solidify the molten metal into the desired shape of the ingot. The design and performance of the crystallizer directly affect the quality and production efficiency of the ingot. The development of the crystallizer is closely related to the casting method of the alloy material. The existing methods of alloy casting and forming bars or wires are mainly the top lead-out process and the horizontal lead-out process. Therefore, the crystallizer is mainly the top lead-out type and the horizontal lead-out type, but both crystallizers and processes have certain disadvantages. Among them, the top lead-out method will tear various crystals inside the ingot, greatly reducing the quality of the alloy. Therefore, the usage is gradually reduced, and the horizontal lead-out crystallizer gradually occupies the market.

[0003] For example, patent application number CN114054693A discloses a crystallizer for horizontal continuous casting of nonferrous alloys, including a cylindrical crystallization part, a cylindrical heat insulation part and a cylindrical cooling part. The cylindrical crystallization part is arranged horizontally, the cylindrical heat insulation part is mounted on the front part of the outer peripheral side wall of the cylindrical crystallization part, and the cylindrical cooling part is mounted on the rear part of the outer peripheral side wall of the cylindrical crystallization part; a material channel running forward and backward is arranged inside the cylindrical crystallization part, and an air gap is arranged between the lower part of the outer peripheral side wall of the cylindrical crystallization part and the lower part of the inner peripheral side wall of the cylindrical cooling part. This crystallizer for horizontal continuous casting of nonferrous alloys can be used in the process of horizontal continuous casting of nonferrous metals, so that the casting billet is cooled evenly from top to bottom, and the structure is relatively simple, the manufacturing cost is low, and the production efficiency, product performance and quality are significantly improved, and it has high use value and promotion value.

[0004] In the prior art, the problem of uneven cooling of the billet from top to bottom during horizontal casting has been improved to a certain extent by improving the cooling structure, but there are still many shortcomings: Firstly, various metal elements tend to precipitate downward during horizontal casting, and the technical problems of uneven alloy composition of the entire ingot and easy extrusion of the lower surface of the ingot remain unsolved. At the same time, the horizontal lead-out method cannot guarantee long-term and large-scale lead-out production, and cannot realize the preparation of long-size or large coils. The rolling process is often required to complete the forming process of the casting, and the operation is cumbersome.

[0005] Secondly, the existing crystallizer is still mainly a single-end cooling structure. When copper alloy containing chromium and zirconium is being cast, the single-end cooling structure cannot present a temperature-decreasing cooling treatment. The solution quickly enters the low-temperature crystallization part, and the outer surface is prone to cracking and wrinkling, which seriously affects the product performance and quality. Finally, existing copper alloys containing elements such as chromium and zirconium are prone to oxidation when in contact with the inner wall of the crystallization part during crystallization, which makes it impossible to improve the roundness and smoothness of the outer surface. Existing crystallizers or crystallization processes cannot solve such technical problems. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a continuous casting bottom-drawing crystallization device for preparing high-quality alloy materials. The present invention installs the present invention at the bottom drain port of the alloy casting furnace and adopts a new bottom-drawing method, so that the ingot can be directly formed into a continuous rod, completes large-scale production processing, and solves the problem that the ingot is easily compressed. Through the arrangement of the electromagnetic stirrer and the inner wall tube and the first water-cooling component and the second water-cooling component and other structures, the problems of uneven distribution of element crystals inside the ingot and easy oxidation and cracking on the surface can also be solved, effectively improving the molding quality and molding efficiency of the ingot.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a continuous casting bottom-leading crystallization device for preparing high-quality alloy materials, comprising a fixed cover plate, a first lead-out pipe, the first lead-out pipe is arranged on the bottom end surface of the fixed cover plate, an electromagnetic stirrer is coaxially arranged on the upper end surface of the fixed cover plate above the first lead-out pipe, an inner wall tube is arranged between the electromagnetic stirrer and the middle of the first lead-out pipe, a copper sleeve is arranged outside the inner wall tube in the first lead-out pipe, a first flow cavity is formed outside the copper sleeve in the first lead-out pipe, a first water-cooling component is arranged outside the first flow cavity, a second lead-out pipe is arranged below the first lead-out pipe, the inner wall tube and the middle of the second lead-out pipe are used to flow alloy solution to complete the molding process, and a second water-cooling component is arranged inside the second lead-out pipe; The first water-cooling component includes a water-cooling inner tube arranged in the first flow cavity, and a plurality of liquid spraying ports are arranged on the outer circumferential surface of the water-cooling inner tube in a spiral upward direction, and each of the liquid spraying ports is arranged at an inclination of 40-43 degrees.

[0008] By setting up an electromagnetic stirrer, the alloy solution can be quickly stirred and mixed before solidification, so that various elements can be evenly distributed throughout the ingot. Combined with the bottom lead-out method, it can solve the problem of the ingot being easily squeezed and the problem of element segregation in the ingot, and play a role in refining the alloy solidification structure, so that the device can prepare fully equiaxed continuous casting ingots, and can also improve the mechanical properties of the continuous casting ingots. By setting the water-cooling inner tube and the liquid spraying port in the first water-cooling assembly, a water flow that is spirally upward and sprayed quickly can be formed outside the copper sleeve for heat dissipation during the first round of cooling of the ingot. Compared with the traditional water-insulating layer heat dissipation, the heat exchange efficiency is improved, the alloy solution can be quickly solidified, and the molding quality of the casting bar is improved; Through the bottom lead-out method and multiple water-cooling components, the alloy ingot can be directly formed into continuous alloy bars during the solidification process without the need for subsequent rolling process. This allows the equipment to complete the preparation of long-size or large coils while ensuring rapid alloying and homogenization, ensuring the stability of the alloy composition.

[0009] In the above-mentioned continuous casting lower crystallization device for preparing high-quality alloy materials, the first water-cooling component also includes a plurality of first liquid inlet pipes arranged on the outer circular surface of the first outlet pipe on one side of the bottom of the first flow cavity, a reflux tube is arranged on the outer circular surface of the top of the first outlet pipe, a plurality of first liquid discharge pipes are connected on the outer circular surface of the reflux tube, and a plurality of reflux ports are connected between the reflux tube and the top of the first flow cavity.

[0010] By setting the first liquid inlet pipe and the reflux port, cooling water can enter from the bottom of the first flow cavity and then be discharged upward from the top. Combined with the setting of the structure of the water-cooled inner tube, a gradual cooling treatment can be formed on the outside of the copper sleeve, further ensuring the molding effect of the casting.

[0011] In the above-mentioned continuous casting lower crystallization device for preparing high-quality alloy materials, the second water-cooling component includes a second flow cavity arranged in a second outlet pipe, a second liquid inlet pipe is connected to one side of the bottom of the second flow cavity, and a second liquid discharge pipe is connected to one side of the top of the second flow cavity.

[0012] Through two-stage cooling treatment, the temperature inside the alloy casting can be effectively reduced, and the outer surface can be effectively solidified, ensuring the molding effect.

[0013] In the above-mentioned continuous casting crystallization device for preparing high-quality alloy materials, the inner wall tube is made of a non-high-purity boron nitride composite tube with zirconium oxide, and the inner circular surface of the inner wall tube is smoothed.

[0014] By using non-high-purity boron nitride composite tubes containing zirconium oxide, the service life of the inner wall tube is effectively increased, and the maintenance cost of the device is reduced. It will not chemically react with metal elements such as chromium and zirconium. At the same time, its hardness and strength are equivalent, and there will be no burning residue during the instantaneous contact of the alloy solution, so that the outer surface of the alloy casting has good smoothness and roundness in the early stage of molding.

[0015] In the above-mentioned continuous casting bottom crystallization device for preparing high-quality alloy materials, the inner wall tube can also be a graphite inner tube.

[0016] By adopting the graphite inner tube, the device can effectively reduce the production cost when casting a small amount of alloy material of less-than-excellent quality.

[0017] In the above-mentioned continuous casting down-drawing crystallization device for preparing high-quality alloy materials, a sunken annular surface is arranged on the top end face of the first lead-out pipe on the outside of the copper sleeve, a removable sealing cover plate is arranged inside the annular surface, an annular panel is arranged on the outer circular surface of the copper sleeve inside the sealing cover plate, and an annular groove is formed on the outside of the annular panel between the sealing cover plate and the annular surface.

[0018] The arrangement of sealing cover plate and ring panel can not only ensure the sealing effect of inner wall tube and copper sleeve, but also facilitate maintenance and disassembly.

[0019] In the above continuous casting bottom crystallization device for preparing high-quality alloy materials, a first sealing ring is arranged in the first lead-out pipe below the copper sleeve and the inner wall tube. The first sealing ring ensures the sealing effect of the copper sleeve and the bottom of the inner wall tube.

[0020] In the above-mentioned continuous casting lower crystallization device for preparing high-quality alloy materials, a first connecting flange is arranged on the end face of the first lead-out tube close to the second lead-out tube, a second connecting flange is arranged on the end face of the second lead-out tube close to the first lead-out tube, and a second sealing ring is arranged between the first connecting flange and the second connecting flange.

[0021] Through the arrangement of the first connecting flange, the second connecting flange and the second sealing ring, the first outlet pipe and the second outlet pipe can be quickly disassembled, installed and maintained, thereby reducing the use cost.

[0022] In the above-mentioned continuous casting crystallization device for preparing high-quality alloy materials, a plurality of support columns are arranged outside the electromagnetic stirrer, each of which is slightly higher than the overall height of the electromagnetic stirrer, and an electromagnetic input device is arranged at one side of the bottom of the electromagnetic stirrer. The arrangement of the support columns ensures that the electromagnetic stirrer can work stably even under the high temperature of the alloy casting furnace.

[0023] In the above-mentioned continuous casting bottom crystallization device for preparing high-quality alloy materials, a connecting pipe head is arranged on the bottom end surface of the second lead-out pipe. The arrangement of the connecting pipe head enables the device to be quickly used in conjunction with a variety of equipment.

[0024] In summary, compared with the prior art, the beneficial effects of this solution are: (1) The present invention combines a bottom-lead installation design with an electromagnetic stirrer and a multi-stage gradual cooling design, so that the alloy solution can automatically flow downward from the bottom discharge port of the alloy casting furnace by its own gravity, so that the alloy casting is not compressed and the electromagnetic stirrer can be used to stir the unsolidified alloy solution at a high speed, so that various alloy elements can be evenly dispersed throughout the inside and outside of the casting, so that the equipment can complete the preparation of long-sized or large-sized coils while ensuring rapid alloying and homogenization, ensuring the stability of the alloy composition, and effectively improving the mechanical properties of the alloy.

[0025] (2) The present invention arranges the water-cooling inner tube and the liquid spraying port in the first water-cooling assembly so that during the first round of cooling, a water flow that is spirally upward and sprays rapidly can be formed on the outside of the copper sleeve used for heat dissipation. Compared with the heat dissipation in the traditional water-insulating layer, the heat exchange efficiency is improved, so that the alloy can be quickly solidified to form a rod casting. In combination with the bottom water-inlet structure, a gradual cooling treatment can be formed, which ensures that the surface of the alloy casting will not be wrinkled or cracked during molding, thereby effectively improving the molding quality of the alloy material. (3) The present invention adopts a non-high-purity boron nitride composite tube containing zirconium oxide, so that the service life of the inner wall tube is effectively improved, and the maintenance cost of the device is reduced. It will not produce chemical reactions with metal elements such as chromium and zirconium. At the same time, its hardness and strength are equivalent. The alloy solution will not have burn-in residues during the instantaneous contact process, so that the outer surface of the alloy casting will form good smoothness and roundness in the early stage of molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective view of the present invention; Figure 2 It is a front view of the present invention; Figure 3 A top view of the present invention; Figure 4 for Figure 3 Stereoscopic cross-sectional view at AA in the middle; Figure 5 for Figure 4 A partial enlarged view of point B in the middle; Figure 6 for Figure 4 A partial enlarged view of point C in the middle; Figure 7 for Figure 2 Stereoscopic cross-sectional view at DD in the middle; Figure 8 for Figure 7 A partial enlarged view of point E in the middle; Fig. 9 A parts diagram showing that a plurality of first liquid inlet pipes and a plurality of first liquid discharge pipes are arranged on the first outlet pipe; Fig.10 It is a three-dimensional diagram of the water-cooling inner tube parts; Fig.11 It is the front view of the water-cooling inner tube part; Fig.12 for Fig.11 Plane section view at FF; In the figure: a fixed cover plate 10, an electromagnetic stirrer 11, a support column 12, an inner wall tube 13, a first lead-out pipe 14, a second lead-out pipe 15, a reflux tube 16, an electromagnetic input device 17, a first connecting flange 18, a second connecting flange 19, a connecting pipe head 20, a fastening bolt 21, a first drain pipe 22, a second drain pipe 23, a water-cooled inner tube 24, a first flow cavity 25, a second flow cavity 26, a third drain pipe 27, a sealing cover plate 28, a liquid spray port 29, a copper sleeve 30, a fixing nail 31, a ring panel 32, an annular groove 33, a first sealing ring 34, a second sealing ring 35, a first liquid inlet pipe 36, a second liquid inlet pipe 37, a third liquid inlet pipe 38, and a reflux port 39. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] Embodiment 1: A continuous casting bottom-drawing crystallization device for preparing high-quality alloy materials. The present invention adopts an advanced bottom-drawing process to solve the problem that in the traditional preparation of high-quality alloy materials such as chromium-zirconium-copper, only top-drawing crystallization or horizontal-drawing crystallization technology can be used, but the overall quality of the alloy cannot be improved. Through the setting of a multi-stage cooling system with an electromagnetic stirrer and an inner wall tube 13 and other structures, the continuous casting bottom-drawing crystallization preparation process of high-quality alloy materials is realized.

[0029] Reference Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Figure 4In order to achieve the above-mentioned purpose, a fixed cover plate 10 and a first lead-out pipe 14 are provided. The fixed cover plate 10 is integrally installed outside the bottom drain port of a conventional alloy casting furnace. A first lead-out pipe 14 with a hole in the middle is provided on the end face of the fixed cover plate 10. An electromagnetic stirrer 11 is provided on the end face of the fixed cover plate 10 directly above the first lead-out pipe 14. An electromagnetic input device 17 is connected to one side of the bottom of the electromagnetic stirrer 11. A plurality of ports for supplying electricity and magnetism to the electromagnetic stirrer 11 are provided at one end of the bottom of the electromagnetic input device 17. The specific power supply and magnetism supply and related control are all prior art, and this scheme will not be elaborated on in detail. A hole is also provided in the middle of the electromagnetic stirrer 11 coaxially with the first lead-out pipe 14, and the middle orifice of the electromagnetic stirrer 11 is aligned with the bottom drain port of the alloy casting furnace. A second lead-out pipe 15 is arranged below the first lead-out pipe 14, a second connecting flange 19 is arranged on the upper end face of the second lead-out pipe 15, a first connecting flange 18 is arranged on the lower end face of the first lead-out pipe 14, the first connecting flange 18 and the second connecting flange 19 can be connected and fixed by a plurality of bolts and nuts, an inner wall pipe 13 is arranged in the middle of the first lead-out pipe 14, one end of the inner wall pipe 13 abuts against the inner bottom end face of the first lead-out pipe 14, the other end of the inner wall pipe 13 passes through the middle hole of the electromagnetic stirrer 11 and extends to the outside of the electromagnetic stirrer 11, the part of the inner wall pipe 13 extending out of the electromagnetic stirrer 11 will be inserted into the discharge port of the alloy casting furnace, a copper sleeve 30 is arranged in the first lead-out pipe 14 outside the inner wall pipe 13, a first water cooling component is arranged in the first lead-out pipe 14 outside the copper sleeve 30, and a second water cooling component is arranged in the second lead-out pipe 15 below the first lead-out pipe 14.

[0030] Specifically, the fixed cover plate 10 is installed on the outside of the liquid discharge port of the crystallization casting furnace through bolts and other structures, so that the inner wall tube 13 can be aligned and connected with the liquid discharge port of the crystallization casting furnace. Then the crystallization casting furnace can discharge the smelted alloy liquid into the inner wall tube 13. During this process, the electromagnetic input device 17 will be energized and magnetized, so as to control the electromagnetic stirrer 11 to start. The internal magnetic field of the electromagnetic stirrer 11 will generate a rotational force. At this time, since the alloy liquid has not flowed into the area of ​​the first lead-out pipe 14, it has not cooled and solidified and has a certain fluidity. Therefore, the stirring force generated by the electromagnetic stirrer 11 can drive the alloy liquid flowing into the inner wall tube 13 to stir at a high speed to form a mixing effect, so that various metal elements in the alloy liquid can be evenly distributed throughout the alloy liquid, thereby effectively reducing the possibility of solute element segregation. Compared with the traditional horizontal lead-out method, the device and the matching down-lead method reduce the accumulation and uneven distribution of elements, and can effectively improve the molding quality of the alloy. The alloy liquid in which the elements are evenly dispersed by high-speed rotation will flow downward into the first lead-out tube 14, and the inner wall tube 13 will conduct the high temperature inside the alloy to the copper sleeve 30. At this time, the first water-cooling component in the first lead-out tube 14 will perform the first cooling treatment on the alloy, so that the outside of the alloy gradually solidifies to form a rod body, and the alloy rod body gradually solidified on the outside will continue to move downward into the second lead-out tube 15, and the second water-cooling component in the second lead-out tube 15 will perform a secondary cooling component, thereby extracting the heat inside the alloy rod body, so that the alloy completely forms a rod body, and finally is discharged outward through the bottom opening of the second lead-out tube 15.

[0031] Reference Figure 3 In the above scheme, the inner wall tube 13 uses a non-high-purity boron nitride composite tube with zirconium oxide, and the inner circular surface is smoothed. In this scheme, if a pure boron nitride composite tube without zirconium oxide is used, its overall strength and hardness are insufficient, it is easy to be damaged, and it needs to be replaced for a long time, while the overall strength and hardness of the boron nitride composite tube with zirconium oxide can be guaranteed. The alloy solution will not burn the tube mouth at the moment it enters the inner wall tube 13, and there will be no residue brought in. When the overall service life is effectively improved, due to the relationship with zirconium oxide, it will not chemically react with elements such as chromium and zirconium that improve the strength of the alloy, and there will be no oxidation reaction. Therefore, the surface finish and roundness of the alloy bar will be effectively improved, which can effectively improve the forming quality and mechanical strength of the alloy bar.

[0032] The second lead-out tube 15 is made of high-temperature resistant stainless steel material, and the internal circulation tube wall is also smoothed. No inner wall tube 13 is set on the inner circumferential surface of the second lead-out tube 15. The purpose is that when the alloy rod is moved into the second lead-out tube 15, the outer circumferential surface of the alloy rod has been basically formed, so the circumference and smoothness have been finalized. Therefore, it is only necessary to dissipate the heat inside the rod by heat conduction. Therefore, the inner wall tube 13 is removed and the heat conduction contact is directly made by the inner tube surface of the second lead-out tube 15, which improves the heat dissipation efficiency while reducing the use of the inner wall tube 13 and reducing the production cost.

[0033] For further information, see Attachment Figure 1 , Attachment Figure 4 and attached Figure 7In order to ensure that the electromagnetic stirrer 11 will not be burned due to high temperature during use, a cooling structure is also provided in the electromagnetic stirrer 11. The specific cooling structure is a prior art and will not be elaborated in this scheme. The cooling structure in the electromagnetic stirrer 11 is connected to a third liquid discharge pipe 27 and a third liquid inlet pipe 38, which are used to introduce the refrigerated liquid into the cooling structure to cool the electromagnetic stirrer 11, thereby ensuring the normal use of the electromagnetic stirrer 11; in addition, a plurality of support columns 12 are provided on the outside of the electromagnetic stirrer 11, and the height of each support column 12 is slightly higher than the upper end surface of the electromagnetic stirrer 11. When the electromagnetic stirrer 11 and the fixed cover plate 10 are installed at the bottom of the alloy casting furnace, the upper end surface of the support column 12 can be attached to the bottom of the alloy casting furnace, thereby avoiding the upper end surface of the electromagnetic stirrer 11 from being directly attached to the bottom end surface of the alloy casting furnace, thereby reducing the influence of the high temperature at the bottom of the casting furnace on the electromagnetic stirrer 11, ensuring the working efficiency and service life of the electromagnetic stirrer 11, improving the quality of the alloy rods, and reducing the production cost.

[0034] For further information, see Attachment Figure 7 , Attachment Figure 8 , Attachment Fig.10 , Attachment Fig.11 and attached Fig.12 In order to improve the refrigeration forming efficiency of the alloy, a first cooling component is provided, which includes a first liquid inlet pipe 36 provided on the outer circumferential surface of one side of the bottom of the first outlet pipe 14, and a first flow cavity 25 is formed between the inside of the first outlet pipe 14 and the copper sleeve 30. A water-cooled inner tube 24 is provided in the first flow cavity 25, and a plurality of inclined liquid spraying ports 29 are evenly provided along the spiral direction on the outer circumferential surface of the water-cooled inner tube 24, and the overall inclination angle of each liquid spraying port 29 is between 40 degrees and 43 degrees. A reflux tube 16 is provided on the outer side of the top of the first flow cavity 25, and the reflux tube 16 is connected to the first flow cavity 25 through a plurality of reflux ports 39, and a first liquid discharge pipe 22 is provided on the outer circumferential surface of the reflux tube 16.

[0035] Specifically, a water pump for liquid supply is connected to the outside of the first liquid inlet pipe 36, and a pump for extracting liquid is connected to the outside of the first liquid discharge pipe 22. When the alloy solution is poured into the inner wall tube 13, the first liquid inlet pipe 36 will pressurize the water flow and pour it into the first flow cavity 25. The water flow will flow upward from the bottom of the first flow cavity 25 and pass through multiple liquid spraying ports 29 to spray on the outer circumferential surface of the copper sleeve 30, so that the inner wall tube 13 and the copper sleeve 30 can be cooled, so that the alloy rod inside the inner wall tube 13 can be cooled. In this process, the multiple liquid spraying ports 29 with an inclination angle between 40 degrees and 43 degrees are compared with the traditional holes without an inclination angle. The overall spraying area is larger, which increases the cooling coverage area of ​​the copper sleeve 30, and the spiral upward arrangement will make the water sprayed from multiple spray ports 29 converge into a water flow during the contact and collision with the copper sleeve 30, and will spirally roll upward in the water-cooled inner tube 24, so that the flow rate of water between the water-cooled inner tube 24 and the copper sleeve 30 is greatly increased, thereby quickly improving the heat dissipation efficiency. When the water flow quickly rolls to the top of the water-cooled inner tube 24, it will be poured into the reflux tube 16 through the top spray port 29 and the reflux port 39, and will be briefly stored in the reflux tube 16, and finally quickly drawn out by the first liquid discharge pipe 22.

[0036] In the above scheme, the cooling water is injected from the bottom and extracted from the upper layer. This structural setting can ensure that the cooling water in the upper layer of the first outlet pipe 14 as a whole will gather a certain temperature in the process of the lower layer water flowing upward, so that the upper water temperature is higher than the lower water temperature, and the overall temperature inside the first flow cavity 25 is gradually increased, so that the alloy rod can also complete the cooling treatment in a gradual manner, avoiding the occurrence of rapid cooling and cracking, and improving the molding quality; the reflux tube 16 will form a thermal insulation and waterproof layer on the outside of the first flow cavity 25, further ensuring the quality of the gradual temperature; in this scheme, no waterproof layer will be formed inside the first flow cavity 25 when cooling, only water will be quickly sprayed on the copper sleeve 30 to form a spiral water flow. Compared with the traditional waterproof layer cooling, this setting has a faster heat exchange efficiency, and the cooling water is not wrapped around the outside of the copper sleeve 30, which can ensure that the copper sleeve 30 can fully conduct the heat of the alloy solution in the inner wall tube 13 to the outer surface before completing the cooling treatment. The cooling efficiency can be effectively improved while the water consumption will be greatly reduced, reducing production costs.

[0037] For further information, see Attachment Figure 4 and attached Figure 7The second cooling component includes a second flow cavity 26 arranged in the second outlet pipe 15, a second liquid inlet pipe 37 is connected to the outer circumferential surface of the bottom of the second flow cavity 26, and a second liquid discharge pipe 23 is connected to the outer circumferential surface of the top of the second flow cavity 26. When the alloy rod moves into the second outlet pipe 15, the second liquid inlet pipe 37 will pour cooling water into the second flow cavity 26 from the bottom. When the second flow cavity 26 is filled with cooling water, it is discharged to the outside through the second liquid discharge pipe 23 to complete the heat dissipation. In this solution, a water-proof layer will be formed inside the second flow cavity 26. The purpose of this setting is different from the inside of the first outlet pipe 14. The alloy rod moved into the second lead-out tube 15 is basically formed and only requires internal deep cooling treatment. The fast jet flow method can only quickly cool the outside, but the internal cooling time is slow. Therefore, a waterproof layer is set up to increase the cooling depth by storing and flowing a large amount of water, thereby completing the cooling treatment. Therefore, the overall length of the second lead-out tube 15 is much longer than the length of the first lead-out tube 14. This setting can ensure the quality of cooling and forming. The water filling method of the second drain pipe 23 and the second inlet pipe 37 makes the second flow cavity 26 the same as the first flow cavity 25, both of which are gradual temperature changes from cold at the bottom to hot at the top, thereby ensuring stable forming treatment of the alloy rod.

[0038] Embodiment 2: Reference Figure 4 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 7 and attached Figure 8A continuous casting bottom-drawing crystallization device for preparing high-quality alloy materials. In order to ensure that the inner wall tube 13 and the copper sleeve 30 and other structures can be quickly replaced and processed after long-term use, a downwardly sunken annular surface is arranged on the outside of the copper sleeve 30 at the top of the first lead-out tube 14, and a sealing cover plate 28 is embedded and pressed in the annular surface. A ring panel 32 is arranged on the top outer circumferential surface of the copper sleeve 30 in the sealing cover plate 28. On the outside of the ring panel 32, an annular groove 33 that cooperates with each other is arranged on the annular surface and the end surface of the sealing cover plate 28. A plurality of fixing holes are arranged on the end surface of the sealing cover plate 28 and the annular surface of the first lead-out tube 14. The sealing cover plate 28 is pressed on the top of the first lead-out tube 14 through the cooperation of the plurality of fixing holes and the fixing nails 31. On the annular surface, when the copper sleeve 30 and the inner wall tube 13 need to be replaced, the staff will remove the electromagnetic stirrer 11 to expose the sealing cover plate 28, and then unscrew the multiple fixing nails 31 to pull out the sealing cover plate 28, and then the copper sleeve 30 and the inner wall tube 13 can be pulled out, and then the new inner wall tube 13 and the copper sleeve 30 can be put in. When putting them in, the bottom end surface of the ring panel 32 will be supported by the groove formed by the annular groove 33 for height limiting treatment, and then the staff will cover the sealing cover plate 28 so that the annular groove 33 can clamp the ring panel 32, and then screw the fixing nails 31 back, and then the electromagnetic stirrer 11 can be installed back to complete the replacement process; A first ring-shaped sealing ring 34 is provided at the bottom of the first outlet pipe 14 below the copper sleeve 30 and the inner wall pipe 13. The first sealing ring 34 seals the bottom end surfaces of the inner wall pipe 13 and the copper sleeve 30. When the inner wall pipe 13 and the copper sleeve 30 are placed inside the first outlet pipe 14, the inner wall pipe 13 and the copper sleeve 30 are pressed against the upper end surface of the first sealing ring 34, so that the copper sleeve 30 and the inner wall pipe 13 can be sealed. A second sealing ring 35 is provided on the mating end surfaces of the first connecting flange 18 and the second connecting flange 19 to seal the first connecting flange 18 and the second connecting flange 19 and ensure the forming quality of the alloy bar.

[0039] Embodiment three: Reference Figure 2 and attached Figure 4 A continuous casting lower crystallization device for preparing high-quality alloy materials. A connecting pipe head 20 that is connected to an external traction or winding structure is arranged at the bottom of the second lead-out pipe 15. Two fastening bolts 21 are rotatably arranged on both sides of the outer circumferential surface of the connecting pipe head 20. The staff can cover the port of the winding structure on the outside of the connecting pipe head 20 and then fix it with the fastening bolts 21.

[0040] Embodiment 4: Reference Figure 3A continuous casting bottom-drawing crystallization device for preparing high-quality alloy materials. The material of the inner wall tube 13 can also be a graphite inner tube. The overall strength and service life of the graphite inner tube are shorter than those of the boron nitride composite tube. Although it is easy to be damaged, the overall cost is only one-tenth of that of the boron nitride composite tube. The overall cost of use is greatly reduced. When the forming demand of the alloy rod is less and the quality requirement is lower, it can be replaced with a graphite inner tube to reduce the cost.

[0041] Embodiment five: Reference Fig. 9 , a continuous casting bottom-induced crystallization device for preparing high-quality alloy materials. When 15 is subjected to the first cooling and forming of the alloy solution, the temperature inside and outside the alloy solution is extremely high. Therefore, in order to further improve the efficiency of heat exchange, two or more 36 can be symmetrically connected on the bottom outer circular surface of 15, and two or more 22 can be symmetrically connected on the top outer circular surface of 16. Compared with the single 36 and 22, this arrangement can improve the uniformity of the overall water pressure inside and outside 24, whether it is water intake or drainage, and will not cause the situation of excessive pressure on one side and uneven water flow. On the other hand, the water flow speed is accelerated, which can better achieve the purpose of rapid heat dissipation.

[0042] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0043] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0044] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A continuous casting bottom-drawing crystallization device for preparing high-quality alloy materials, comprising a fixed cover plate (10), a first lead-out pipe (14), characterized in that: A first outlet pipe (14) is arranged on the bottom end surface of the fixed cover plate (10); an electromagnetic stirrer (11) is coaxially arranged on the upper end surface of the fixed cover plate (10) above the first outlet pipe (14); an inner wall pipe (13) is arranged between the electromagnetic stirrer (11) and the middle of the first outlet pipe (14); a copper sleeve (30) is arranged outside the inner wall pipe (13) in the first outlet pipe (14); a first flow cavity (25) is formed outside the copper sleeve (30) in the first outlet pipe (14); a first water cooling component is arranged outside the first flow cavity (25); a second outlet pipe (15) is arranged below the first outlet pipe (14); the inner wall pipe (13) and the middle of the second outlet pipe (15) are used to flow alloy solution to complete the molding process; a second water cooling component is arranged inside the second outlet pipe (15); The first water-cooling component comprises a water-cooling inner tube (24) arranged in a first flow cavity (25), and a plurality of liquid spraying ports (29) are arranged on an outer circumferential surface of the water-cooling inner tube (24) in a spiral upward direction, and each of the liquid spraying ports (29) is arranged at an inclination of 40-43 degrees.

2. A continuous casting bottom crystallization device for preparing high-quality alloy materials according to claim 1, characterized in that: The first water cooling component also includes a plurality of first liquid inlet pipes (36) arranged on one side of the bottom of the first flow cavity (25) on the outer circumferential surface of the first outlet pipe (14); a return tube (16) is arranged on the outer circumferential surface of the top of the first outlet pipe (14); a plurality of first liquid discharge pipes (22) are connectedly arranged on the outer circumferential surface of the return tube (16); and a plurality of return ports (39) are connectedly arranged between the return tube (16) and the top of the first flow cavity (25).

3. The continuous casting bottom crystallization device for preparing high-quality alloy materials according to claim 1, characterized in that: The second water cooling component comprises a second flow cavity (26) arranged in a second outlet pipe (15), a second liquid inlet pipe (37) being connected to one side of the bottom of the second flow cavity (26), and a second liquid discharge pipe (23) being connected to one side of the top of the second flow cavity (26).

4. The continuous casting bottom crystallization device for preparing high-quality alloy materials according to claim 1, characterized in that: The inner wall tube (13) is a non-high-purity boron nitride composite tube with zirconium oxide, and the inner circumferential surface of the inner wall tube (13) is smoothed.

5. A continuous casting bottom crystallization device for preparing high-quality alloy materials according to claim 4, characterized in that: The inner wall tube (13) may also be a graphite inner tube.

6. The continuous casting bottom crystallization device for preparing high-quality alloy materials according to claim 1, characterized in that: The copper sleeve (30) is provided with a sunken annular surface on the top end surface of the first lead-out pipe (14) on the outside, a detachable sealing cover plate (28) is provided inside the annular surface, an annular panel (32) is provided on the outer circumferential surface of the copper sleeve (30) inside the sealing cover plate (28), and an annular groove (33) is formed on the outside of the annular panel (32) between the sealing cover plate (28) and the annular surface.

7. A continuous casting bottom crystallization device for preparing high-quality alloy materials according to claim 6, characterized in that: A first sealing ring (34) is arranged in the first outlet pipe (14) below the copper sleeve (30) and the inner wall pipe (13).

8. A continuous casting bottom-draining crystallization device for preparing high-quality alloy materials according to claim 7, characterized in that: A first connecting flange (18) is provided on the end surface of the first outlet pipe (14) close to the second outlet pipe (15), a second connecting flange (19) is provided on the end surface of the second outlet pipe (15) close to the first outlet pipe (14), and a second sealing ring (35) is provided between the first connecting flange (18) and the second connecting flange (19).

9. The continuous casting bottom crystallization device for preparing high-quality alloy materials according to claim 1, characterized in that: The electromagnetic stirrer (11) is provided with a plurality of support columns (12) outside, and the height of each support column (12) is slightly higher than the overall height of the electromagnetic stirrer (11). An electromagnetic input device (17) is provided on one side of the bottom of the electromagnetic stirrer (11).

10. A continuous casting bottom crystallization device for preparing high-quality alloy materials according to claim 9, characterized in that: A connecting pipe head (20) is provided on the bottom end surface of the second outlet pipe (15).

Images