Low temperature alloy continuous casting equipment with belt feeding device and operation method thereof

Abstract

The present invention relates to a low-temperature alloy continuous casting device with a belt feeding device and an operation method thereof. The present invention relates to the field of continuous casting production technology. The low-temperature alloy continuous casting device comprises: a crucible; a crucible cover plate is arranged on the crucible; an outlet is opened at the bottom of the crucible; an induction heating coil is sleeved on the outside of the crucible; a lifting stopper rod passes through the crucible cover plate, enters the crucible, and is movably connected with the outlet; a flow control grid is arranged at the end of the lifting stopper rod facing the outlet and is connected with the outlet; a mold tube is arranged below the crucible and is connected to the crucible through a pipeline; a belt feeding device is arranged above the mold tube; a vibration component is arranged below the belt feeding device; a cooling device is sleeved outside the mold tube; and an ingot guide device is arranged below the mold tube. The present invention increases the accuracy of the belt feeding through the vibration component, and the cooperation of the lifting stopper rod and the flow control grid ensures the accuracy of the crucible pouring amount, can accurately adjust the position and rate of equiaxed crystal nucleation in the mold tube, increase the dispersion effect of equiaxed crystals, and improve the quality of the ingot.

Description

Technical Field

[0001] The invention relates to the technical field of continuous casting production, and in particular to low-temperature alloy continuous casting equipment with a belt feeding device and an operating method thereof. Background Art

[0002] Continuous casting is widely used in the steel industry. Continuous casting has the advantages of improving production efficiency, reducing energy consumption, increasing metal yield, and being easy to automate and mechanize. Therefore, continuous casting is widely used in today's steel production and manufacturing field. Continuous casting equipment is the direct carrier for the implementation of the continuous casting process in the continuous casting production process. Therefore, the performance of the continuous casting equipment directly affects the effectiveness of the implementation of the continuous casting process. If the performance of the continuous casting equipment is poor, the continuous casting process cannot be effectively transformed, which reduces the continuous casting production efficiency and has a great impact on the final performance of the continuous casting billet.

[0003] Existing continuous casting equipment is often large-scale equipment used for continuous mass production in factories. Due to the high experimental cost, large experimental equipment, high difficulty and high risk of vibrating feeding belts for large continuous casting billets, the continuous casting process cannot be effectively implemented when experimenters conduct experiments on continuous casting theories and methods.

[0004] Therefore, the prior art realizes laboratory research on continuous casting technology by introducing a small continuous casting system of low-melting alloys. For example, the Chinese patent with publication number CN118768534A proposes a method for producing surface defect-free low-alloy high-strength steel, but the patent has a straightening temperature of 1000℃-1100℃ and a straightening temperature of 900℃-1000℃. The operating temperature is too high and the safety of the experimenters cannot be guaranteed. Therefore, by using small continuous casting equipment and the low melting point of low-melting alloy materials, without using large converter equipment, and adding smelting crucible equipment, it is an effective means to solve the laboratory continuous casting process experiment. For example, the Chinese patent with publication number CN117858775A proposes a method and equipment for adjusting the continuous casting system, but the patent is to determine the measurement variables related to the fluctuation of the casting liquid level formed in the mold, and better reduce the fluctuation of the casting liquid level greater than or equal to 0.6Hz, but still cannot improve the quality of the ingot during the continuous casting process.

[0005] To this end, the present application provides a low-temperature alloy continuous casting equipment with a belt feeding device and an operating method thereof. Summary of the invention

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a low-temperature alloy continuous casting equipment with a belt feeding device and an operating method thereof, so as to solve the technical problem that the quality of the ingot cannot be improved during the continuous casting process in the laboratory due to the low melting point of the low-melting-point alloy material and the completion of the laboratory continuous casting process by small-scale continuous casting equipment.

[0007] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a low-temperature alloy continuous casting equipment with a belt feeding device, including: a crucible; a crucible cover plate, which is arranged on the crucible; an outlet, which is opened at the bottom of the crucible; an induction heating coil, which is sleeved on the outside of the crucible; a lifting stopper rod, which is passed through the crucible cover plate, enters the crucible, and is movably connected with the outlet; a flow control grid, which is arranged at the end of the lifting stopper rod facing the outlet and is connected with the outlet; a casting tube, which is arranged below the crucible and is connected to the crucible through a pipeline; a belt feeding device, which is arranged above the casting tube, so that the cold metal belt is fed into the casting tube longitudinally; a vibration assembly, which is arranged below the belt feeding device and sleeved on the outside of the cold metal belt; a cooling device, which is sleeved on the outside of the casting tube; and an ingot guiding device, which is arranged below the casting tube.

[0008] Optionally, a double-layer sealed cooling chamber is provided outside the casting tube to cool the casting tube.

[0009] Optionally, the flow control grid includes: a grid sleeve, which is sleeved on the end of the lifting plug rod facing the outlet and connected to the outlet; and grid holes, which are opened in the circumference of the grid sleeve, and the number of the grid holes is multiple.

[0010] Optionally, the vibration assembly includes: a slideway, which is sleeved on the outside of the cold metal belt; and a vibrator, which is arranged on the adjacent side of the slideway and connected to the slideway to drive the slideway to vibrate.

[0011] Optionally, the ingot guide device includes: an ingot guide rod plug, which is arranged inside the casting tube and movably connected to the inner wall of the casting tube; a ingot guide rod, which is connected to the ingot guide rod plug; a main telescopic rod, which is sleeved on the outside of the ingot guide rod; a movable contact plate of the ingot guide rod, which is arranged between the main telescopic rod and the inner wall of the casting tube and movably connected to the inner wall of the casting tube; a secondary telescopic rod, which is arranged between the main telescopic rod and the movable contact plate of the ingot guide rod and is connected to both the main telescopic rod and the movable contact plate of the ingot guide rod; and a traction wheel, which is connected to the outside of the movable contact plate of the ingot guide rod to drive the movable contact plate of the ingot guide rod to achieve traction movement relative to the casting tube.

[0012] Optionally, a detachable pipeline is arranged between the casting tube and the crucible; and an auxiliary heater is arranged outside the detachable pipeline.

[0013] Optionally, the belt feeding controller is electrically connected to the belt feeding device and the vibration assembly; the continuous casting automation controller is electrically connected to the cooling device, the traction wheel, the lifting plug rod, and the crucible, and is connected to the crucible through a first thermocouple, and is connected to the casting tube through a second thermocouple.

[0014] A second aspect of the present invention provides an operating method for a low temperature alloy continuous casting device having a belt feeding device, the operating method comprising the steps of:

[0015] S1: placing a low-temperature alloy block into a crucible, turning on an induction heating coil to heat the crucible to a predetermined temperature, and obtaining a molten low-temperature alloy liquid;

[0016] S2: Pull up the lifting stopper rod to open the flow control grid, and introduce the molten low-temperature alloy liquid into the casting tube until the molten low-temperature alloy liquid fills the casting tube;

[0017] S3: Turn on the continuous casting automation controller to automatically maintain the pouring temperature and pouring speed of the crucible, the cooling temperature of the cooling device and the casting speed of the traction wheel;

[0018] S4: Turn on the belt feeding device and the vibration assembly to feed the cold metal belt into the mold tube by longitudinal or transverse vibration, and adjust the feeding speed, amplitude, vibration frequency and feeding position through the belt feeding controller;

[0019] S5: When the molten low-temperature alloy liquid in the crucible is used up, the continuous casting automation controller stops the crucible pouring and cooling of the cooling device, the feeding belt controller stops the feeding belt device from feeding the cold metal belt, and stops the vibration of the vibration component. After the molten low-temperature alloy liquid in the casting tube is completely cooled, the ingot is obtained and the ingot is pulled out through the ingot drawing device.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides a low-temperature alloy continuous casting device with a belt feeding device and an operation method thereof. By arranging a flow control grid and a lifting stopper rod at the outlet of the bottom of the crucible, during the process of pouring the crucible, as the lifting stopper rod is lifted, the pouring flow rate of the molten low-temperature alloy liquid in the crucible is guaranteed to increase linearly, thereby improving the accuracy of the crucible pouring flow rate. The belt feeding device is arranged above the casting tube, controls the feeding speed and position of the cold metal belt, and applies longitudinal vibration to the cold metal belt, and the vibration component itself applies transverse vibration to the cold metal belt. The longitudinal vibration or transverse vibration accelerates the melting of the cold metal belt itself and the dendrites formed by the surface condensation, and throws the formed equiaxed crystals away from the cold metal belt, realizing the dispersed distribution of the equiaxed crystals inside the casting tube, thereby strengthening the fluidity of the equiaxed crystals and improving the equiaxed crystal generation rate. Due to the cooperation of the lifting stopper rod and the flow control grid, the crucible pouring flow rate is linearly controllable, the amount of molten low-temperature metal liquid poured from the crucible is more accurate, and the pouring amount of molten low-temperature metal liquid matches the amount of equiaxed crystals formed inside the casting tube, making the element distribution and solidification structure of the ingot more uniform, thereby effectively suppressing the internal quality defects of the ingot such as central segregation, looseness, shrinkage cavity and cracks, and improving the quality of the ingot. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the connection of components of the low-temperature alloy continuous casting equipment with a belt feeding device of the present invention;

[0023] Figure 2The present invention is a flow chart of the operating method of the low temperature alloy continuous casting equipment with a belt feeding device.

[0024] Description of reference numerals:

[0025] 1. Continuous casting automation controller; 2. Insulation sleeve; 3. Induction heating coil; 4. Crucible; 5. Lifting stopper rod; 6. First thermocouple; 61. Second thermocouple; 7. Crucible cover; 8. Removable pipeline; 9. Auxiliary heater; 10. Double-layer sealed cooling chamber; 11. Traction wheel; 12. Ingot rod movable contact plate; 13. Mold tube; 14. Cooling circulation device; 15. Feeding belt controller; 16. Feeding belt device; 17. Vibrator; 18. Slide; 19. Cold metal belt; 20. Mold tube cover; 21. Flow control grid; 22. Main telescopic rod; 23. Ingot rod; 24. Ingot rod plug; 25. Auxiliary telescopic rod. DETAILED DESCRIPTION

[0026] 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.

[0027] Embodiment:

[0028] An embodiment of the present invention provides a low temperature alloy continuous casting device having a belt feeding device, such as Figure 1 As shown, it includes: a crucible 4; a crucible cover plate 7, which is arranged on the crucible 4; an outlet, which is opened at the bottom of the crucible 4; an induction heating coil 3, which is sleeved on the outside of the crucible 4; a lifting stopper rod 5, which is inserted through the crucible cover plate 7, enters the crucible 4, and is movably connected with the outlet; a flow control grid 21, which is arranged at the end of the lifting stopper rod 5 facing the outlet and is connected with the outlet; a casting tube 13, which is arranged below the crucible 4 and is connected to the crucible 4 through a pipeline; a belt feeding device 16, which is arranged above the casting tube 13, so that a cold metal belt 19 is longitudinally fed into the casting tube 13; a vibration component, which is arranged below the belt feeding device 16 and sleeved on the outside of the cold metal belt 19; a cooling device 14, which is sleeved on the outside of the casting tube 13; and an ingot guide device, which is arranged below the casting tube 13.

[0029] Exemplarily, the low-temperature alloy continuous casting equipment with a belt feeding device in this embodiment mainly includes a crucible 4, an induction heating coil 3, a lifting stopper rod 5, a belt feeding device 16, a casting tube 13, a belt feeding device 16, a vibration assembly, a cooling device 14 and an ingot guiding device. Among them, the crucible 4 melts the low-temperature alloy block; the induction heating coil 3 heats the crucible 4 to melt the low-temperature alloy block to obtain molten low-temperature alloy liquid; the lifting stopper rod 5 cooperates with the flow control grid 21 set at the outlet to achieve accurate control of the pouring flow rate of the molten low-temperature alloy liquid in the crucible 4; the belt feeding device 16 feeds the cold metal belt 19 to control the feeding speed and position of the cold metal belt 19; the casting tube 13 cools and casts the fed cold metal belt 19 and the poured molten low-temperature alloy liquid to obtain a casting; the vibration component applies vibration to the cold metal belt 19 to achieve lateral vibration of the cold metal belt 19; the cooling device 14 cools the casting tube 13; the ingot guiding device pulls out the cooled casting, and then completes the ingot guiding to obtain the casting.

[0030] Illustratively, the low-temperature alloy used in this embodiment is a Wood's alloy with a relatively low melting point. Therefore, the use of the crucible 4 can avoid the large converter device required for continuous casting. At the same time, the crucible 4 can also replace the role of the intermediate package and directly introduce the molten low-temperature alloy liquid into the casting tube 13, which greatly saves the floor space of the low-temperature alloy continuous casting equipment in this embodiment and reduces the volume and operation complexity of the low-temperature alloy continuous casting equipment.

[0031] Exemplarily, the insulation sleeve 2 is set outside the crucible 4 to reduce the convection heat exchange between the outer wall of the crucible 4 and the molten low-temperature alloy liquid. The convection heat exchange will make the temperature of the outer wall of the crucible 4 lower, which will cause the molten low-temperature alloy liquid to produce a certain condensation effect. In addition, an induction heating coil 3 is arranged on the outside of the insulation sleeve 2, and the low-temperature alloy inside the crucible 4 is melted by medium-frequency electromagnetic induction, providing the required temperature environment for the melting of the low-temperature alloy. At the same time, electromagnetic induction will also produce a stirring effect on the molten low-temperature alloy liquid, so that the molten low-temperature alloy liquid is heated more evenly, preventing the internal quality problems of the ingot due to uneven heating, thereby improving the quality of the ingot.

[0032] Illustratively, the crucible 4 in this embodiment is provided with a crucible cover plate 7, and the casting tube 13 is provided with a casting tube cover plate 20, which effectively reduces the oxidation of the molten low-temperature alloy liquid in the crucible 4 and the casting tube 13, and reduces the impact and pollution of oxidation on the ingot.

[0033] Exemplarily, the crucible 4 is made of metal, graphite or quartz. The melting point of the crucible 4 is relatively high. While completing the smelting of the low-temperature alloy block, it ensures that it is not melted, so as to avoid the molten crucible 4 material from contaminating the ingot.

[0034] In a possible embodiment, Figure 1As shown, a double-layer sealed cooling chamber 10 is arranged outside the casting tube 13 to cool the casting tube 13.

[0035] Exemplarily, a double-layer sealed cooling chamber 10 is provided on the outside of the casting tube 13 , and a circulating condensing liquid at 20° C.-120° C. is introduced into the double-layer sealed cooling chamber 10 to promote the solidification of the ingot in the casting tube 13 .

[0036] Exemplarily, the first thermocouple 6 inside the crucible 4 passes through the crucible cover plate 7 and is arranged close to the side wall of the crucible 4, and the second thermocouple 61 outside the casting tube 13 passes through the double-layer sealed cooling chamber 10 and is arranged close to the outer wall of the casting tube 13. The first thermocouple 6 and the second thermocouple 61 respectively transmit the real-time temperature data of the crucible 4 and the casting tube 13 to the continuous casting automation controller 1, thereby facilitating the continuous casting automation controller 1 to adjust the temperature parameters of the crucible 4 and the casting tube 13, which is beneficial to regulating the temperature of the crucible 4 and the casting tube 13.

[0037] In a possible embodiment, Figure 1 As shown, the flow control grid 21 includes: a grid sleeve, which is sleeved on the end of the lifting plug rod 5 facing the outlet and connected to the outlet; and grid holes, which are opened in the circumference of the grid sleeve, and the number of the grid holes is multiple.

[0038] Exemplarily, the stopper rod in the prior art is a round rod with a conical head, and flow control is achieved by the cooperation between the conical head and the crucible groove outlet. However, as the stopper rod is lifted, the passage area of ​​the molten low-temperature alloy liquid at the crucible groove outlet is nonlinear, which increases the difficulty of regulating the pouring flow rate during the crucible pouring process of the prior art. The amount of molten low-temperature alloy liquid poured in the mold tube 13 is unstable. On the one hand, the cooling amount of the double-layer sealed cooling cavity 10 outside the mold tube 13 is relatively stable. If the pouring amount of the low-temperature alloy liquid is large and the cooling amount is relatively small, the condensation speed of the ingot will be slowed down and the ingot will be thinner; if the pouring amount of the low-temperature alloy liquid is small and the cooling amount is relatively large, the condensation speed of the ingot will be accelerated and the ingot will be thicker, so the thickness of the ingot obtained in the mold tube 13 is unstable, which in turn affects the internal quality of the ingot. On the other hand, the unstable pouring amount of the molten low-temperature alloy liquid will cause fluctuations in the molten low-temperature alloy liquid in the casting tube 13. The fluctuations will not only affect the liquid surface, but also the area below the liquid surface, resulting in an unstable number of equiaxed crystals produced by the cold metal strip 19 fed by the feeding device 16, which will affect the internal quality of the ingot.

[0039] The flow control grid 21 in this embodiment is a grid sleeve with multiple grid holes of the same size, the grid holes are long vertical holes, and the number of grid holes can be 4-12. After the lifting stopper rod 5 cooperates with the flow control grid 21, as the lifting stopper rod 5 is lifted, the molten low-temperature alloy liquid can be poured through the grid holes in the circumferential direction near the bottom of the grid sleeve. And as the lifting stopper rod 5 is lifted, the passing area of ​​the molten low-temperature alloy liquid increases linearly, which greatly increases the controllability of the flow of the molten low-temperature alloy liquid, thereby improving the accuracy of the pouring flow of the crucible 4.

[0040] For example, in this embodiment, the number of grille holes is 6, which can be determined according to actual casting needs, and the number of grille holes is not specifically limited here.

[0041] In a possible embodiment, Figure 1 As shown, the vibration assembly includes: a slide 18, which is sleeved on the outside of a cold metal belt 19; and a vibrator 17, which is arranged on the adjacent side of the slide 18 and connected to the slide 18 to drive the slide 18 to vibrate.

[0042] For example, the slideway 18 of this embodiment is sleeved on the cold metal belt 19, and is non-rigidly connected to the cold metal belt 19, not fixedly connected, so that the cold metal belt 19 is allowed to vibrate during the feeding process. In addition, the vibrator 17 adjusts the vibration amplitude and vibration frequency applied to the cold metal belt 19 according to real-time monitoring data, thereby adjusting the equiaxed crystal nucleation rate, grain size and dispersion effect.

[0043] In a possible embodiment, Figure 1 As shown, the detachable pipeline 8 is arranged between the casting tube 13 and the crucible 4; the auxiliary heater 9 is arranged outside the detachable pipeline 8.

[0044] Exemplarily, the auxiliary heater 9 is wound around the outer wall of the detachable pipeline 8 to continuously heat the detachable pipeline 8, thereby reducing the solidification of the low-temperature alloy liquid on the inner wall of the detachable pipeline 8 caused by the heat transfer process between the air, the wall of the detachable pipeline 8, and the molten low-temperature alloy liquid, and ensuring that the flow rate of the molten low-temperature alloy liquid is relatively stable. In addition, after the continuous casting is completed, the auxiliary heater 9 continues to heat the detachable pipeline 8, which is convenient for cleaning the residual molten low-temperature alloy liquid inside the detachable pipeline 8 and preventing the low-temperature alloy liquid from solidifying in the detachable pipeline 8.

[0045] In a possible embodiment, Figure 1As shown, the ingot dummy device includes: an ingot dummy rod plug 24, which is arranged inside the mold tube 13 and movably connected to the inner wall of the mold tube 13; the ingot dummy rod 23, which is connected to the ingot dummy rod plug 24; the main telescopic rod 22, which is sleeved on the outside of the ingot dummy rod 23; the ingot dummy rod movable contact plate 12, which is arranged between the main telescopic rod 22 and the inner wall of the mold tube 13 and movably connected to the inner wall of the mold tube 13; the auxiliary telescopic rod 25, which is arranged between the main telescopic rod 22 and the ingot dummy rod movable contact plate 12, and is connected to both the main telescopic rod 22 and the ingot dummy rod movable contact plate 12; and the traction wheel 11, which is connected to the outside of the ingot dummy rod movable contact plate 12, so as to drive the ingot dummy rod movable contact plate 12 to achieve traction movement relative to the mold tube 13.

[0046] For example, Figure 1 As shown, the mold tube 13 in this embodiment is arranged in the vertical direction, and the dummy rod plug 24 is arranged below the mold tube 13. Before the start of pouring, the dummy rod plug 24 is deeply inserted into the mold tube 13 to serve as the bottom of the mold tube 13. Before the start of pouring, the dummy rod plug 24 is fixed. After the start of pouring, the molten low-temperature alloy liquid will contact the dummy rod plug 24 cooled by the cooling device 14, so that the molten low-temperature alloy liquid and the dummy rod plug 24 are condensed together. Then, through the traction of the traction wheel 11, the dummy rod plug 24 will gradually move downward in the mold tube 13, and the dummy rod 23 and the cast billet will be pulled out from the bottom of the mold tube 13. After the dummy rod 23 is completely pulled out, the cast billet is obtained, and the dummy rod process is completed.

[0047] For example, Figure 1 As shown, the main telescopic rod 22 is sleeved on the dummy rod 23. Along the extension direction of the dummy rod 23, there are multiple main telescopic rods 22. A secondary telescopic rod 25 is arranged on the side of each main telescopic rod 22. In this embodiment, two secondary telescopic rods 25 are arranged on the side of each main telescopic rod 22. A hydraulic cylinder is arranged between the main telescopic rod 22 and the secondary telescopic rod 25 to realize the extension and contraction of the secondary telescopic rod 25, that is, a hydraulic cylinder is arranged between the main telescopic rod 22 and the secondary telescopic rod 25, so that the secondary telescopic rod 25 is extended and contracted relative to the main telescopic rod 22, thereby driving the dummy rod movable contact plate 12 to extend and contract relative to the dummy rod 23. In this way, the dummy rod of different sizes can be realized. It only needs to change the size of the casting tube 13 and the size of the dummy rod plug 24, and then adjust the extension length of the secondary telescopic rod 25 relative to the main telescopic rod 22 accordingly, without the need to replace the dummy device as a whole, which further improves the versatility of the low-temperature alloy continuous casting equipment in this embodiment.

[0048] Exemplarily, the telescopic adjustment between the main telescopic rod 22 and the secondary telescopic rod 25 can be controlled by the continuous casting automation controller 1, and the telescopic adjustment between multiple main telescopic rods 22 and secondary telescopic rods 25 can be synchronously controlled by the continuous casting automation controller 1, thereby increasing the degree of automation of the low-temperature alloy continuous casting equipment in this embodiment.

[0049] In a possible embodiment, Figure 1 As shown, the belt feeding controller 15 is electrically connected to the belt feeding device 16 and the vibration assembly; the continuous casting automation controller 1 is electrically connected to the cooling device 14, the traction wheel 11, the lifting plug rod 5, and the crucible 4, and is connected to the inside of the crucible 4 through the first thermocouple 6, and is connected to the outside of the casting tube 13 through the second thermocouple 61.

[0050] Exemplarily, the circulation speed and cooling temperature of the circulating coolant in the double-layer sealed cooling chamber 10 are controlled by the continuous casting automation controller 1, so that the ingot in the casting mold tube 13 is maintained in the range of 30°C-280°C, thereby preventing the liquid core inside the ingot from being completely cooled, causing the ingot to be subjected to excessive stress and cracks due to improper cooling intensity, resulting in damage to the ingot during the casting process, and poor internal structural performance of the ingot.

[0051] This embodiment also provides an operating method of a low temperature alloy continuous casting device having a belt feeding device, such as Figure 2 As shown, the steps of the operation method include:

[0052] S1: putting a low-temperature alloy block into a crucible 4, turning on the induction heating coil 3 to heat the crucible 4 to a temperature of 52° C. to 330° C. to obtain a molten low-temperature alloy liquid;

[0053] Exemplarily, the low-temperature alloy block in this embodiment is made of Wood's alloy. Since the liquidus temperature of Wood's alloy is 47°C-280°C, in order to ensure that the low-temperature alloy block in the crucible 4 is in a molten state and obtain a molten low-temperature alloy liquid that can be poured, the predetermined heating temperature of the crucible 4 is set to be 5°C-50°C higher than 47°C-280°C. Therefore, the predetermined heating temperature is in the range of 52°C-330°C.

[0054] S2: Pull up the lifting plug rod 5 to open the flow control grid 21, and introduce the molten low-temperature alloy liquid into the casting tube 13 until the molten low-temperature alloy liquid fills the casting tube 13;

[0055] S3: Turn on the continuous casting automation controller 1 to automatically maintain the pouring temperature and pouring speed of the crucible 4, the cooling temperature of the cooling device 14, and the casting speed of the traction wheel 11;

[0056] S4: Turn on the belt feeding device 16 and the vibration assembly to feed the cold metal belt 19 into the mold tube 13 by longitudinal or transverse vibration, and adjust the feeding speed, amplitude, vibration frequency and feeding position through the belt feeding controller 15;

[0057] S5: When the molten low-temperature alloy liquid in the crucible 4 is used up, the continuous casting automation controller 1 stops the pouring of the crucible 4 and the cooling of the cooling device 14, the feeding belt controller 15 stops the feeding belt device 16 from feeding the cold metal belt 19, and stops the vibration of the vibration component, and the molten low-temperature alloy liquid in the casting tube 13 is completely cooled to obtain the ingot, and the ingot is pulled out through the ingot drawing device.

[0058] For example, in step S4, by adjusting the feeding speed of the cold metal strip 19, the nucleation position of the equiaxed crystal is regulated, which can prevent the cold metal strip 19 from contacting the already solidified low-temperature alloy and control the internal equiaxed crystal nucleation rate. In addition, by periodically feeding the cold metal strip 19 through the feeding device 16, the longitudinal vibration of the cold metal strip 19 is achieved, which promotes the formation and dispersion of equiaxed crystals inside the casting tube 13. In this embodiment, Figure 1 As shown, the cold metal belt 19 clamped by the belt feeding device 16 is fed into the casting tube 13 in the vertical direction. It is fed longitudinally twice continuously and then pulled up once. The process is repeated. The cold metal belt 19 is fed longitudinally twice and then pulled up once. The periodic feeding of the cold metal belt 19 is the longitudinal vibration of the cold metal belt 19, which promotes the formation and dispersion of equiaxed crystals inside the casting tube 13.

[0059] Exemplarily, during the melting process of the cold metal strip 19 in the casting tube 13, the cold metal strip 19 will absorb heat and then form equiaxed crystals on its own surface. As the periodic feeding of the strip proceeds, the grains on the surface of the cold metal strip 19 are thrown away by the longitudinal vibration caused by the periodic feeding of the strip or the lateral vibration applied by the vibration component, thereby increasing the equiaxed crystal rate and reducing the thickness of the surface solidification structure, thereby reducing thermal resistance and enhancing heat exchange between the cold metal strip 19 and the molten low-temperature alloy liquid. The longitudinal vibration caused by the periodic feeding belt or the lateral vibration thrown by the vibration component promotes the stirring of the low-temperature alloy liquid, further strengthening the heat exchange between the cold metal belt 19 and the low-temperature alloy liquid; after increasing the heat exchange, the speed at which the cold metal belt 19 melts into equiaxed crystals is accelerated, further improving the equiaxed crystal rate. These equiaxed crystals, under the action of the lateral vibration brought by the vibration component or the longitudinal vibration brought by the feeding belt device 16, greatly increase the dispersion effect of the equiaxed crystals in the casting tube 13, further strengthen the flow of the equiaxed crystals, increase the dispersion effect of the equiaxed crystals, and then deposit to the bottom of the casting tube 13 to form a large number of fine equiaxed crystals. The solidification structure composed of these fine equiaxed crystals makes the element distribution of the ingot more uniform, better suppresses the internal quality defects of the ingot center segregation, looseness, shrinkage holes, and cracks, and further improves the quality of the ingot.

[0060] 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.

[0061] 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.

[0062] 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 low temperature alloy continuous casting equipment with a belt feeding device, characterized in that: include: Crucible; A crucible cover plate, arranged on the crucible; An outlet is provided at the bottom of the crucible; An induction heating coil is sleeved on the outside of the crucible; A lifting stopper rod is passed through the crucible cover plate, enters the crucible, and is movably connected to the outlet; A flow control grid, arranged at the end of the lifting stopper rod facing the outlet and connected to the outlet; A casting tube is disposed below the crucible and is connected to the crucible through a pipeline; A strip feeding device is arranged above the mold tube to feed the cold metal strip longitudinally into the mold tube; A vibration assembly is arranged below the belt feeding device and sleeved on the outside of the cold metal belt; A cooling device, sleeved on the outside of the casting tube; An ingot guide device is arranged below the casting tube; The flow control grid comprises: A grid sleeve, sleeved on the end of the lifting stopper rod facing the outlet and connected to the outlet; A grid hole is provided in the circumference of the grid sleeve, and the number of the grid holes is multiple; The grid sleeve is provided with a plurality of grid holes of the same size; The vibration assembly comprises: The slideway is sleeved on the outside of the cold metal belt and is non-rigidly connected to the cold metal belt; The vibrator is arranged at the adjacent side of the slideway and connected with the slideway to drive the slideway to vibrate.

2. The low temperature alloy continuous casting equipment with a belt feeding device according to claim 1, characterized in that: Also includes: A double-layer sealed cooling chamber is arranged outside the casting tube to cool the casting tube.

3. The low temperature alloy continuous casting equipment with a belt feeding device according to claim 1, characterized in that: The ingot starting device comprises: A dummy rod plug is arranged inside the mold tube and movably connected to the inner wall of the mold tube; A dummy bar connected to the dummy bar plug; A main telescopic rod, sleeved on the outside of the dummy rod; A dummy rod movable contact plate is disposed between the main telescopic rod and the inner wall of the mold tube and is movably connected to the inner wall of the mold tube; A secondary telescopic rod, disposed between the main telescopic rod and the dummy rod movable contact plate, and connected to both the main telescopic rod and the dummy rod movable contact plate; A traction wheel is connected to the outside of the movable contact plate of the dummy rod to drive the movable contact plate of the dummy rod to achieve traction movement relative to the mold tube.

4. The low temperature alloy continuous casting equipment with a belt feeding device according to claim 3, characterized in that: Also includes: A detachable pipeline is arranged between the casting tube and the crucible; The auxiliary heater is arranged outside the detachable pipeline.

5. The low temperature alloy continuous casting equipment with a belt feeding device according to claim 4, characterized in that: Also includes: A tape feeding controller, electrically connected to the tape feeding device and the vibration assembly; The continuous casting automation controller is electrically connected to the cooling device, the traction wheel, the lifting plug rod, and the crucible, and is connected to the crucible through a first thermocouple and is connected to the casting tube through a second thermocouple.

6. An operating method of a low temperature alloy continuous casting device having a belt feeding device, characterized in that: Using the low temperature alloy continuous casting equipment with a belt feeding device as claimed in claim 5, the steps of the operating method include: S1: placing a low-temperature alloy block into the crucible, turning on the induction heating coil to heat the crucible to a predetermined temperature, and obtaining a molten low-temperature alloy liquid; S2: Pull up the lifting stopper rod to open the flow control grid, and introduce molten low-temperature alloy liquid into the casting tube until the molten low-temperature alloy liquid fills the casting tube; S3: turning on the continuous casting automation controller to automatically maintain the pouring temperature and pouring speed of the crucible, the cooling temperature of the cooling device, and the casting speed of the traction wheel; S4: Turn on the belt feeding device and the vibration assembly to feed the cold metal belt into the mold tube by longitudinal or transverse vibration, and adjust the feeding speed, amplitude, vibration frequency and feeding position through the belt feeding controller; S5: When the molten low-temperature alloy liquid in the crucible is used up, the continuous casting automation controller stops the crucible pouring and the cooling of the cooling device, the feeding belt controller stops the feeding belt device from feeding the cold metal belt, and stops the vibration of the vibration component, and the ingot is obtained after the molten low-temperature alloy liquid in the casting tube is completely cooled, and the ingot is pulled out through the ingot guiding device.

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