Zone melting device and zone melting method for purifying metal material

Abstract

According to the zone melting device for metal material purification and the zone melting method, the zone melting device comprises a rotary driving assembly, the tilting angle of a container is adjusted through the rotary driving assembly, the heating distance is accurately controlled through a heating piece and a cooling piece, rapid conduction of heat flow is achieved through the cooling piece, and a temperature field can be effectively regulated and controlled through a zone melting assembly; therefore, a narrow melting area can be formed, the driving assembly is moved to enable the zone melting assembly to move in the length direction of the container, and zone melting within any range in the length direction of the container is easily and conveniently achieved. The rotary driving assembly drives the container to rotate, the angle of the container can be adjusted according to different metal materials, impurities in a melting area are prevented from flowing back to an area where purification is completed, the purification effect of zone melting can be improved, the purity of the metal materials after zone melting can reach 99.999%-99.99999%, and the purity of the metal materials after zone melting can reach 99.999%-99.99999%. And impurity elements of which the equilibrium partition coefficient is greater than or less than 1 can be removed to below 0.005 ppm.

Description

Technical Field

[0001] The present invention relates to the technical field of metal purification, and in particular to a regional smelting device and a regional smelting method for purifying metal materials. Background Art

[0002] Zone melting is one of the effective means of purifying metal materials. The essence of this method is to form a melting zone by locally heating a narrow ingot, and move the heater to make this narrow melting zone slowly move along the ingot in a certain direction. By utilizing the difference in equilibrium concentration of impurities between the solid phase and the liquid phase, the impurities are segregated into the solid phase or liquid phase during repeated melting and solidification and can be removed or redistributed.

[0003] Horizontal zone melting purification is a method of zone melting. The metal material is placed horizontally in a long trough container to form an ingot, and the molten zone moves horizontally. The temperature field of the horizontal zone melting method is difficult to effectively control, the melting zone width is long, the purification effect is limited, and multiple zone melting is often required to achieve the preparation of high-purity metals.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems that the temperature field of the horizontal zone melting method is difficult to effectively control, the melting zone width is long, the purification effect is limited, and multiple zone meltings are often required to achieve the preparation of high-purity metals. A zone melting device and a zone melting method for purifying metal materials are provided.

[0006] According to one aspect of the present invention, there is provided a zone melting device for purifying a metal material, comprising a container, a pressure control system, a clamping assembly, a zone melting assembly, a moving drive assembly and a rotating drive assembly, wherein the container is used to accommodate the metal material; the pressure control system is used to draw the vacuum degree inside the container to below 0 Pa, and fill with argon gas until the inside of the container reaches normal pressure; the clamping assembly is used to fix the two ends of the container; the zone melting assembly comprises a heating element and a cooling element, the heating element is used to heat the container to form a heated area, and the cooling element is used to cool both sides of the heated area to form a narrow melting zone; the moving drive assembly is used to drive the zone melting assembly to move along the length direction of the container; and the rotating drive assembly is used to drive the container to rotate.

[0007] In one embodiment of the present invention, the clamping assembly includes a first clamping seat, a second clamping seat, a first connecting rod, a second connecting rod and a third connecting rod. The first clamping seat and the second clamping seat are respectively clamped at two ends of the container, one end of the first connecting rod is connected to the first clamping seat, one end of the second connecting rod is connected to the second clamping seat, and the third connecting rod is connected to the other ends of the first connecting rod and the second connecting rod.

[0008] In one embodiment of the present invention, the rotary drive assembly includes a first screw and a driving gear, the driving gear is meshed with the first screw, the rotation of the driving gear can drive the first screw to rotate, and one end of the first screw is connected to the third connecting rod.

[0009] In one embodiment of the present invention, the zone melting assembly further comprises a fourth connecting rod, the cooling elements are respectively arranged at two ends of the fourth connecting rod, and the heating element is arranged between the two cooling elements.

[0010] In one embodiment of the present invention, the mobile drive assembly includes a drive motor, a second screw and a slider, the drive motor is used to drive the second screw to rotate, the second screw is threadedly connected to the slider, the slider is fixedly connected to the fourth connecting rod, and the drive motor is fixedly connected to the clamping assembly.

[0011] In one embodiment of the present invention, the zone melting device further comprises a control system, wherein the control system is used to control the speed and distance at which the zone melting assembly moves along the container, and the control system is also used to control the heating temperature of the heating element.

[0012] In one embodiment of the present invention, the heating width of the heating element is 30±5 mm.

[0013] In one embodiment of the present invention, the distance between the two cooling elements is 45-50 mm.

[0014] In one embodiment of the present invention, the container is a quartz tube, and the heating element and the cooling element are annular structures surrounding the periphery of the quartz tube.

[0015] According to another aspect of the present invention, a regional smelting method for purifying a metal material is provided, which is implemented by the regional smelting device for purifying a metal material provided in one aspect of the present invention, and the method comprises:

[0016] Put the metal material in a container, fix both ends of the container using a clamping assembly, and adjust the container to a set angle by rotating a driving assembly;

[0017] replacing the air in the container with an inert gas through a pressure regulating system;

[0018] Using a mobile driving assembly to move the zone melting assembly to the bottom of the container, turning on a heating element and a cooling element, and moving the zone melting assembly from the bottom of the container to the top of the container, after the zone melting assembly reaches the top of the container, turning off the heating element and the cooling element, and moving the zone melting assembly from the top of the container to the bottom of the container, thereby completing one zone melting;

[0019] The zone melting is repeated for multiple times, and after the internal temperature of the container drops to room temperature, a sample of the metal material formed after multiple zone melting is taken out.

[0020] The present invention adjusts the tilting angle of the container by a rotating drive component, accurately controls the heating distance by a heating element and a cooling element, and realizes rapid conduction of heat flow by a cooling element. The zone melting component can effectively regulate the temperature field, thereby forming a narrow melting zone. The mobile driving component enables the zone melting component to move along the length direction of the container, and easily realizes zone melting within any range in the length direction of the container. The rotating drive component drives the container to rotate, and can adjust the angle of the container for different metal materials, prevent impurities in the melting zone from flowing back to the purified area, and improve the purification effect of zone melting. After zone melting, the purity of the metal material can reach 99.999%-99.99999%, and the impurity elements with a balanced distribution coefficient greater than or less than 1 can be removed to less than 0.005ppm.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification are used to explain the principles of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0023] Figure 1 A schematic structural diagram of a zone melting device for purifying metal materials provided in an embodiment of the present invention.

[0024] Figure 2 A flow chart of a zone smelting method for purifying metal materials provided in an embodiment of the present invention.

[0025] In the figure: 1-container, 2-clamping assembly, 21-first clamping seat, 22-second clamping seat, 23-first connecting rod, 24-second connecting rod, 25-third connecting rod, 3-zone melting assembly, 31-heating element, 32-cooling element, 33-fourth connecting rod, 331-first connecting section, 332-second connecting section, 4-moving drive assembly, 41-driving motor, 42-second screw, 43-slider, 5-rotating drive assembly, 51-first screw, 52-driving gear. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale.

[0027] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the diagram to another component, these terms are used in this specification only for convenience, such as according to the direction of the examples in the drawings. It is understood that if the device of the diagram is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0028] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0029] Zone melting is one of the effective means of purifying metal materials. The essence of this method is to form a narrow melting zone by locally heating a narrow ingot, and move the heater to make this narrow melting zone slowly move along the ingot in a certain direction, and use the difference in equilibrium concentration of impurities between the solid phase and the liquid phase. During the repeated melting and solidification process, the impurities are segregated into the solid phase or liquid phase and can be removed or redistributed.

[0030] Horizontal zone melting purification is a method of zone melting, in which the metal material is placed horizontally in a long trough container 1 to form an ingot, and the molten zone moves horizontally. The temperature field of the horizontal zone melting method is difficult to effectively control, the melting zone width is long, the purification effect is limited, and multiple zone meltings are often required to achieve the preparation of high-purity metals.

[0031] Based on this, an embodiment of the present invention provides a regional smelting device for purifying metal materials. Figure 1 As shown, the zone melting device for purifying metal materials includes a container 1, a pressure control system, a clamping assembly 2, a zone melting assembly 3, a moving drive assembly 4 and a rotating drive assembly 5, wherein the container 1 is used to accommodate metal materials; the pressure control system is used to evacuate the vacuum degree inside the container 1 to below 0 Pa, and fill with argon gas until the inside of the container 1 reaches normal pressure; the clamping assembly 2 is used to fix the two ends of the container 1; the zone melting assembly 3 includes a heating element 31 and a cooling element 32, wherein the heating element 31 is used to heat the container 1 to form a heated area, and the cooling element 32 is used to cool both sides of the heated area to form a narrow melting area; the moving drive assembly 4 is used to drive the zone melting assembly 3 to move along the length direction of the container 1; and the rotating drive assembly 5 is used to drive the container 1 to rotate.

[0032] The tilting angle of the container 1 is adjusted by the rotating drive component 5, the heating distance is precisely controlled by the heating element 31 and the cooling element 32, and the cooling element 32 is used to realize the rapid conduction of heat flow. The zone melting component 3 can effectively control the temperature field, thereby forming a narrow melting zone. The moving drive component 4 allows the zone melting component 3 to move along the length direction of the container 1, and easily realizes the zone melting in any range in the length direction of the container 1. The rotating drive component 5 drives the container 1 to rotate, and can adjust the angle of the container 1 for different metal materials, prevent the impurities in the melting zone from flowing back to the purified area, and improve the purification effect of the zone melting. After the zone melting, the purity of the metal material can reach 99.999%-99.99999%, and the impurity elements with a balanced distribution coefficient greater than or less than 1 can be removed to less than 0.005ppm.

[0033] The zone melting device for purifying metal materials according to the embodiment of the present invention will be described in detail below with reference to specific examples.

[0034] like Figure 1As shown, the regional melting device for purifying metal materials may include a container 1 and a clamping assembly 2, wherein the container 1 is used to accommodate the metal material. The clamping assembly 2 includes a first clamping seat 21, a second clamping seat 22, a first connecting rod 23, a second connecting rod 24 and a third connecting rod 25, wherein the first clamping seat 21 and the second clamping seat 22 are respectively clamped at both ends of the container 1, one end of the first connecting rod 23 is connected to the first clamping seat 21, one end of the second connecting rod 24 is connected to the second clamping seat 22, and the third connecting rod 25 is connected to the other ends of the first connecting rod 23 and the second connecting rod 24, and the third connecting rod 25 may be perpendicular to the first connecting rod 23 and the second connecting rod 24.

[0035] The zone melting device for purifying metal materials may also include a zone melting assembly 3, which includes a fourth connecting rod 33, a heating element 31 and a cooling element 32. The fourth connecting rod 33 includes a first connecting section 331 and two second connecting sections 332, one end of each of the two second connecting sections 332 is connected to the two ends of the first connecting section 331, the heating element 31 is arranged between the two cooling elements 32, the two cooling elements 32 are connected to the other end of the second connecting section 332, and the heating element 31 is connected to the first connecting section 331. In this embodiment, the container 1 may be a quartz tube. The heating element 31 and the cooling element 32 are annular structures surrounding the periphery of the quartz tube. The heating element 31 is used to heat the container 1 to form a heated area, and the cooling element 32 is used to cool both sides of the heated area to form a narrow melting zone. The distance between the two cooling elements 32 is 45-50 mm, and the heating width of the heating element 31 is 30±5 mm.

[0036] It should be noted that the cooling member 32 may be an annular pipe, and a medium inlet may be provided on the annular pipe to inject the cooling medium into the annular pipe. The cooling medium may be a gas or a liquid, which is not specifically limited here. A plurality of medium outlets may also be provided on the side of the cooling member 32 close to the container 1, and the cooling medium is sprayed onto the surface of the container 1 through the medium outlets, so as to further improve the cooling effect of the cooling member 32. The fourth connecting rod 33 may also be provided in a tubular shape, the cooling member 32 is connected to the fourth connecting rod 33, the medium inlet is provided on the fourth connecting rod 33, and the injection of the cooling medium of the two cooling members 32 is completed through one medium inlet.

[0037] The zone melting device for purifying metal materials may also include a rotary drive assembly 5, the rotary drive assembly 5 includes a first screw 51 and a drive gear 52, one end of the first screw 51 is connected to the third connecting rod 25, the drive gear 52 is meshed with the first screw 51, the rotation of the drive gear 52 can drive the first screw 51 to rotate, the first screw 51 will drive the third connecting rod 25 to rotate, the third connecting rod 25 drives the first connecting rod 23 and the second connecting rod 24 to rotate synchronously, the first connecting rod 23 and the second connecting rod 24 drive the first clamping seat 21 and the second clamping seat 22 to rotate synchronously, and the first clamping seat 21 and the second clamping seat 22 drive the container 1 to rotate along the trajectory s within the range of 0-180°. The angle of the container 1 can be adjusted for different metal materials to prevent impurities in the molten zone from flowing back to the purified area, which can improve the purification effect of the zone melting.

[0038] The zone melting device for purifying metal materials may further include a mobile drive assembly 4, which may include a drive motor 41, a second screw 42 and a slider 43, wherein the slider 43 is fixedly connected to the fourth connecting rod 33, the second screw 42 is threadedly connected to the slider 43, and the drive motor 41 is used to drive the second screw 42 to rotate, and when the second screw 42 rotates, the slider 43 can be driven to slide up and down along the screw 9, and the slider 43 can drive the fourth connecting rod 33 to move up and down, thereby driving the heating element 31 and the cooling element 32 to move along the length direction of the container 1. The drive motor 41 can be arranged on the first connecting rod 23 or the second connecting rod 24 in the clamping assembly 2, so that the rotation drive assembly 5 can drive the mobile drive assembly 4 to rotate synchronously. In other embodiments, the drive motor 41 can also be arranged on the third connecting rod 25 in the clamping assembly 2.

[0039] The regional melting device for purifying metal materials may also include a pressure control system and a control system. The pressure control system is used to evacuate the vacuum degree inside the container 1 to below 0Pa, and fill argon gas until the inside of the container 1 reaches normal pressure. Argon gas is an inert gas and can form a protection to prevent the metal material from being oxidized during heating. The control system is used to control the speed and distance of the transmission component moving along the container 1, and the control system is also used to control the heating temperature of the heating element.

[0040] The embodiment of the present invention also provides a regional smelting method for purifying metal materials, such as Figure 1 and Figure 2 As shown, the method comprises the following steps:

[0041] Step S10, placing the metal material in the container 1, fixing both ends of the container 1 by using the clamping assembly 2, and adjusting the container 1 to a set angle by using the rotating driving assembly 5;

[0042] Step S20, replacing the air in the container 1 with an inert gas through a pressure control system;

[0043] Step S30, using the mobile drive assembly 4 to move the zone melting assembly 3 to the bottom of the container 1, turning on the heating element 31 and the cooling element 32, and moving the zone melting assembly 3 from the bottom of the container 1 to the top of the container 1. After the zone melting assembly 3 reaches the top of the container 1, turning off the heating element 31 and the cooling element 32, and moving the zone melting assembly 3 from the top of the container 1 to the bottom of the container 1, completing one zone melting;

[0044] Step S40, repeating the zone melting for multiple times, and after the internal temperature of the container 1 drops to room temperature, taking out the sample of the metal material formed after multiple zone melting.

[0045] This method can refer to the structure and beneficial effects of the regional melting device for purifying metal materials, which will not be described in detail here.

[0046] In step S20, the air in the container 1 is replaced with an inert gas through the pressure control system, including: the vacuum degree inside the container 1 is evacuated to below 0 Pa through the pressure control system, and argon gas is filled until the inside of the container 1 reaches normal pressure, completing one gas washing. At least three gas washing actions are required to completely replace the air in the container 1 with an inert gas.

[0047] In step S30, the heating width of the heating element 31 along the length direction of the container 1 is 30±5mm, the heating temperature is 200-400°C, the control system can move the heating element 31 and the cooling element 32 from the bottom of the container 1 to the top of the quartz tube at a constant rate, and the rising speed of the heating element 31 and the cooling element 32 is 10-20mm / h. The control system can move the heating element 31 from the top to the bottom of the container 1 at a constant rate, and the descending speed of the heating element 31 and the cooling element 32 is 150-200mm / h.

[0048] In step S40, the zone melting may be repeated 8-10 times.

[0049] The zone smelting method for purifying the metal material involved in the invention is described in detail below with reference to specific embodiments.

[0050] Embodiment 1:

[0051] The metal material is placed in a quartz tube, and the two ends of the quartz tube are fixed by using the first clamping seat 21 and the second clamping seat 22, and the angle between the quartz tube and the horizontal plane is adjusted to 90° by using the rotary drive assembly 5; the pressure control system is turned on, the vacuum degree in the quartz tube is evacuated to below 0Pa, and argon gas is filled to normal pressure to complete a gas washing, and the gas washing action is repeated three times; the zone melting assembly 3 is adjusted to the bottom of the quartz tube by using the mobile drive assembly 4, and the heating element 31 is turned on. The heating width of the heating element along the length direction of the quartz tube is 25mm, and the heating temperature is 30 0℃, then start the control system, move the zone melting assembly 3 from the bottom of the quartz tube to the top of the quartz tube at a constant rate, the rising speed of the zone melting assembly 3 is 10mm / h, after the zone melting assembly 3 reaches the top of the quartz tube, turn off the heating element 31 and the cooling element 32, move the heating element from the top of the quartz tube to the bottom at a constant rate, the descending speed of the zone melting assembly 3 is 150mm / h; repeat the zone melting 10 times, after the internal temperature of the quartz tube drops to room temperature, take out the sample formed by the metal material after multiple zone melting.

[0052] Test results: The purity of the metal material after zone smelting can reach 99.9999%, and the impurity elements with equilibrium distribution coefficient greater than or less than 1 are removed to less than 0.005ppm.

[0053] Embodiment 2:

[0054] The metal material is placed in a quartz tube, and the two ends of the quartz tube are fixed by using a first clamping seat 21 and a second clamping seat 22, and the angle between the quartz tube and the horizontal plane is adjusted to 0° by using a rotary drive assembly 5; the pressure control system is turned on, the vacuum degree in the quartz tube is evacuated to below 0Pa, and argon gas is filled to normal pressure to complete a gas wash, and the gas wash action is repeated four times; the zone melting assembly 3 is adjusted to the bottom of the quartz tube by using a mobile drive assembly 4, and the heating element 31 is turned on. The heating width of the heating element along the length direction of the quartz tube is 30mm, and the heating temperature is 20 0℃, then start the control system, move the zone melting assembly 3 from the bottom of the quartz tube to the top of the quartz tube at a constant rate, the rising speed of the zone melting assembly 3 is 20mm / h, after the zone melting assembly 3 reaches the top of the quartz tube, turn off the heating element 31 and the cooling element 32, move the heating element from the top to the bottom of the quartz tube at a constant rate, the descending speed of the zone melting assembly 3 is 200mm / h; repeat the zone melting 8 times, after the internal temperature of the quartz tube drops to room temperature, take out the samples formed by the metal material after multiple zone melting.

[0055] Test results: The purity of the metal material after zone smelting can reach 99.999%, and the impurity elements with equilibrium distribution coefficients much greater than or much less than 1 are removed to below 0.005ppm.

[0056] Embodiment 3:

[0057] The metal material is placed in a quartz tube, and the two ends of the quartz tube are fixed by using the first clamping seat 21 and the second clamping seat 22, and the angle between the quartz tube and the horizontal plane is adjusted to 10° by using the rotary drive assembly 5; the pressure control system is turned on, the vacuum degree in the quartz tube is evacuated to below 0Pa, and argon gas is filled to normal pressure to complete a gas wash, and the gas wash action is repeated five times; the zone melting assembly 3 is adjusted to the bottom of the quartz tube by using the mobile drive assembly 4, and the heating element 31 is turned on. The heating width of the heating element along the length direction of the quartz tube is 35mm, and the heating temperature is 4 00℃, then start the control system, move the zone melting assembly 3 from the bottom of the quartz tube to the top of the quartz tube at a constant rate, the rising speed of the zone melting assembly 3 is 15mm / h, after the zone melting assembly 3 reaches the top of the quartz tube, turn off the heating element 31 and the cooling element 32, move the heating element from the top of the quartz tube to the bottom at a constant rate, the descending speed of the zone melting assembly 3 is 175mm / h; repeat the zone melting 9 times, after the internal temperature of the quartz tube drops to room temperature, take out the samples of the metal material formed after multiple zone melting.

[0058] Test results: The purity of the metal material after zone smelting can reach 99.999%, and the impurity elements with equilibrium distribution coefficients much greater than or much less than 1 are removed to below 0.005ppm.

[0059] Embodiment 4:

[0060] The metal material is placed in a quartz tube, and the two ends of the quartz tube are fixed by using the first clamping seat 21 and the second clamping seat 22, and the angle between the quartz tube and the horizontal plane is adjusted to 30° by using the rotary drive assembly 5; the pressure control system is turned on, the vacuum degree in the quartz tube is evacuated to below 0Pa, and argon gas is filled to normal pressure to complete a gas wash, and the gas wash action is repeated five times; the zone melting assembly 3 is adjusted to the bottom of the quartz tube by using the mobile drive assembly 4, and the heating element 31 is turned on. The heating width of the heating element along the length direction of the quartz tube is 32mm, and the heating temperature is 3 50°C, then start the control system, move the zone melting assembly 3 from the bottom of the quartz tube to the top of the quartz tube at a constant rate, the rising speed of the zone melting assembly 3 is 18 mm / h, after the zone melting assembly 3 reaches the top of the quartz tube, turn off the heating element 31 and the cooling element 32, move the heating element from the top of the quartz tube to the bottom at a constant rate, the descending speed of the zone melting assembly 3 is 180 mm / h; repeat the zone melting 8 times, after the internal temperature of the quartz tube drops to room temperature, take out the samples of the metal material formed after multiple zone melting.

[0061] Test results: The purity of the metal material after zone smelting can reach 99.999%, and the impurity elements with equilibrium distribution coefficients much greater than or much less than 1 are removed to below 0.005ppm.

[0062] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the disclosure of the invention herein. This application is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

Claims

1. A zone melting device for purifying metal materials, characterized in that: include: A container for containing metal materials; a pressure regulating system for replacing the air in the container with an inert gas; A clamping assembly, used to fix both ends of the container; A zone melting assembly, comprising a heating element and a cooling element, wherein the heating element is used to heat the container to form a heated zone, and the cooling element is used to cool both sides of the heated zone to form a narrow melting zone; A moving driving assembly, used for driving the zone melting assembly to move along the length direction of the container; The rotation driving assembly is used to drive the container to rotate.

2. The zone melting device for purifying metal materials according to claim 1, characterized in that: The clamping assembly includes a first clamping seat, a second clamping seat, a first connecting rod, a second connecting rod and a third connecting rod. The first clamping seat and the second clamping seat are respectively clamped at two ends of the container, one end of the first connecting rod is connected to the first clamping seat, one end of the second connecting rod is connected to the second clamping seat, and the third connecting rod is connected to the other ends of the first connecting rod and the second connecting rod.

3. The zone melting device for purifying metal materials according to claim 2, characterized in that: The rotary drive assembly includes a first screw rod and a driving gear. The driving gear is meshed with the first screw rod. The rotation of the driving gear can drive the first screw rod to rotate. One end of the first screw rod is connected to the third connecting rod.

4. The zone melting device for purifying metal materials according to claim 1, characterized in that: The zone melting assembly further includes a fourth connecting rod, the cooling elements are respectively arranged at two ends of the fourth connecting rod, and the heating element is arranged between the two cooling elements.

5. The zone melting device for purifying metal materials according to claim 4, characterized in that: The mobile driving assembly includes a driving motor, a second screw and a slider, the driving motor is used to drive the second screw to rotate, the second screw is threadedly connected to the slider, the slider is fixedly connected to the fourth connecting rod, and the driving motor is fixedly connected to the clamping assembly.

6. The zone melting device for purifying metal materials according to claim 1, characterized in that: The zone melting device further comprises a control system, wherein the control system is used to control the speed and distance at which the zone melting assembly moves along the container, and the control system is also used to control the heating temperature of the heating element.

7. The zone melting device for purifying metal materials according to claim 1, characterized in that: The heating width of the heating element is 30±5 mm.

8. The zone melting device for purifying metal materials according to claim 1, characterized in that: The distance between the two cooling elements is 45-50 mm.

9. The zone melting device for purifying metal materials according to claim 1, characterized in that: The container is a quartz tube, and the heating element and the cooling element are annular structures surrounding the periphery of the quartz tube.

10. A method for purifying a metal material by regional smelting, which is achieved by using the regional smelting device for purifying a metal material according to any one of claims 1 to 9, characterized in that: The method comprises: Put the metal material in a container, fix both ends of the container using a clamping assembly, and adjust the container to a set angle by rotating a driving assembly; replacing the air in the container with an inert gas through a pressure regulating system; Using a mobile driving assembly to move the zone melting assembly to the bottom of the container, turning on a heating element and a cooling element, and moving the zone melting assembly from the bottom of the container to the top of the container, after the zone melting assembly reaches the top of the container, turning off the heating element and the cooling element, and moving the zone melting assembly from the top of the container to the bottom of the container, thereby completing one zone melting; The zone melting is repeated for multiple times, and after the internal temperature of the container drops to room temperature, a sample of the metal material formed after multiple zone melting is taken out.

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