Device and method for efficiently preparing high-purity metal through annular horizontal zone smelting

Abstract

The invention relates to the technical field of non-ferrous metal purification, and discloses a device and method for efficiently preparing high-purity metal through annular horizontal zone smelting, the device comprises a sealing box body, an arc quartz boat, a quartz boat supporting and moving device, a coil driving device and a heating coil, and the sealing box body is provided with a sealing door, an air inlet and an extraction opening; the plurality of arc quartz boats are connected in series end to end to form an annular quartz boat with a notch; the quartz boat supporting and moving device can support the annular quartz boat and drive the annular quartz boat to rotate clockwise or anticlockwise at a constant speed; and the coil driving device is connected with the heating coil and can drive the heating coil to advance from the notch to sleeve the annular quartz boat or retreat to leave the annular quartz boat. According to the method, the zone melting yield is increased, and efficient and stable production of high-purity metal of 6N and above 6N can be achieved efficiently.

Description

Technical Field

[0001] The present invention relates to the technical field of nonferrous metal purification, and more specifically, to a device and method for efficiently preparing high-purity metals by annular horizontal zone smelting. Background Art

[0002] High-purity metals are widely used in modern electronic information, aerospace, precision instruments, military industry and other fields. For example, high-purity heavy metals such as Ni and Co are mainly used in high-temperature refractory materials, In is mainly used in ITO targets and liquid crystal displays, and Ge is mainly used in infrared optical materials. High-purity light metals such as Al and Mg are mainly used as large integrated circuits, optoelectronic storage media, aerospace materials, communication materials, etc. High-purity rare earth metals such as La, Yb, and Gd are mainly used as dielectric film materials, magnetic refrigeration materials, medical imaging materials, nuclear materials, etc. High-purity semi-metals such as Se, Te, As, and Si are mainly used to prepare semiconductor materials, thin-film battery materials, photosensitive devices, electronic devices, etc. High-purity precious metals such as Au and Ag are mainly used in advanced alloy contacts, photoelectric conversion components, etc. With the further development of my country's strategic emerging industries such as precision electronic instruments, semiconductors, and photovoltaics, the domestic market demand for high-purity metals will further expand.

[0003] Zone melting is a deep impurity removal technology for metals. Its essence is to use the difference in solubility of impurities in the solid and molten states of the main metal to realize the directional redistribution of impurities in the solid-liquid alternation process, so that impurities are enriched at the head and tail of the metal rod. Zone melting technology is widely used, the process is easy to control, pollution-free, the product purity is high, and single crystals with uniform composition can be prepared. It is suitable for the final stage of high-purity metal preparation. Therefore, zone melting has become the research direction of high-purity metals at home and abroad.

[0004] At present, the preparation of ultra-high purity metals has received more and more attention, and related scientific research and patent inventions have grown rapidly. For example, the application number CN201910606312.X, entitled "A device for preparing ultra-high purity indium and its preparation method", discloses a device and method for preparing ultra-high purity indium. High-purity indium with a purity of 7N5 is obtained by vacuum distillation and vertical zone melting, but the process is relatively complicated. Another example is the application number CN202311418834.X, entitled "A method for preparing 5N high-purity copper by regional smelting". 4N cathode copper is subjected to multi-pass regional smelting, and the smelting atmosphere adopts a mixed gas of argon and hydrogen, in which the volume proportion of hydrogen in the mixed gas is 5-30%. This invention can significantly reduce the oxygen content by using a mixed gas of argon and hydrogen as the smelting atmosphere for multi-pass regional smelting. However, at present, there are problems in the preparation of high-purity metals by regional smelting, such as low equipment capacity, limited amount of ingots processed by the zone melting equipment each time, and long time required to complete the regional smelting. These problems affect the large-scale application of zone melting methods in the preparation of high-purity metals.

[0005] Therefore, it is necessary to propose a device and method for preparing high-purity metals by atmospheric pressure regional smelting of large ingots and multiple melting zones, which can significantly improve the production efficiency of regional smelting and purification of metals, reduce equipment and production costs, and facilitate industrial production. Summary of the invention

[0006] In view of this, the present invention proposes a device and method for efficiently preparing high-purity metals by annular horizontal zone melting, so as to overcome the problem of low efficiency in the existing zone melting process for preparing high-purity metals.

[0007] A device for efficiently preparing high-purity metal by annular horizontal regional smelting comprises a sealed box, an arc quartz boat, a quartz boat support and moving device, a coil driving device and a heating coil, a sealed door is provided on the side of the sealed box, and an air inlet and an air extraction port with corresponding valves are respectively provided on the two opposite side walls of the sealed box, and the air extraction port is externally connected to a vacuum pump; a raw material accommodating groove is provided in the arc quartz boat along its arc direction, and matching clamping parts are provided at both ends of the arc quartz boat, and a plurality of the arc quartz boats are connected head to tail in series to form a vacuum pump; The invention relates to a ring-shaped quartz boat with a notch; the quartz boat supporting and moving devices and the coil driving devices are both provided with a plurality of them and are arranged in a staggered ring-shaped radial manner in the inner cavity of the sealed box body; the quartz boat supporting and moving devices can support the ring-shaped quartz boat and drive the ring-shaped quartz boat to rotate clockwise or counterclockwise at a uniform speed; the coil driving device is connected to the heating coil at one end close to the ring-shaped quartz boat, and the coil driving device can drive the heating coil to move forward from the notch to cover the ring-shaped quartz boat or move backward to leave the ring-shaped quartz boat.

[0008] Preferably, radial inner walls on both sides of the raw material containing groove are provided with a draft angle of 3 to 5°.

[0009] Preferably, the minimum arc angle of the arc quartz boat is 16 degrees, and the maximum arc angle does not exceed 120 degrees; the arc diameter of the arc quartz boat is greater than 500 mm and less than or equal to 1800 mm.

[0010] Preferably, the quartz boat supporting and moving device includes an arc-shaped transmission support installed in the inner cavity of the sealed box body, and a rotating driving wheel and a plurality of supporting wheels are arranged and rotatably installed in the middle of the arc-shaped transmission support along an arc direction. One side driving shaft end of the rotating driving wheel extends out of the arc-shaped transmission support and is connected to a driving motor arranged on the outside of the arc-shaped transmission support through a coupling.

[0011] Preferably, the upper parts of the two radial side walls of the arc-shaped transmission support are provided with limiting baffles for limiting the arc quartz boat from escaping.

[0012] Preferably, the coil driving device includes a second driving motor installed at the bottom of the inner cavity of the sealed box, the output shaft of the second driving motor faces the annular quartz boat, and the output shaft is connected to a screw through a second coupling, and the screw slider on the screw is connected to the vertically placed heating coil.

[0013] Preferably, the heating coil is a copper coil, and the copper coil is electrically connected to a temperature control device arranged outside the sealed box.

[0014] Preferably, a box sealing detector is installed at the sealing door.

[0015] Preferably, a device for efficiently preparing high-purity metal by smelting in an annular horizontal area is used as a single device unit, and multiple device units can be connected in parallel to achieve production expansion.

[0016] A method for efficiently preparing high-purity metal by annular horizontal zone melting, using the above-mentioned device for efficiently preparing high-purity metal by annular horizontal zone melting, and the specific steps are:

[0017] S1. Putting refined metal raw materials obtained by pyrometallurgy or electrolytic refining into a circular quartz boat, and connecting multiple circular quartz boats in series end to end to form a ring-shaped quartz boat with a gap;

[0018] S2, opening the sealing door of the sealing box, and placing the annular quartz boat on the corresponding multiple quartz boat supporting and moving devices;

[0019] S3, the quartz boat support moving device drives the annular quartz boat to rotate, and at the same time, the coil driving device drives the heating coil to move forward from the notch and cover the annular quartz boat in sequence;

[0020] S4. After closing the sealing door and ensuring that the sealing of the sealing box meets the requirements, turn on the vacuum pump to exhaust air until the pressure is 1~1×10 -6 Pa, close the valve of the exhaust port; then open the valve of the air inlet to introduce protective gas, and keep the pressure at the standard pressure for 5 to 10 minutes; after repeating the above gas replacement operation several times, finally keep the air pressure in the sealed box at the standard atmospheric pressure, and prepare to start regional melting;

[0021] S5. Control the temperature of the heating coil to the required temperature. After observing that the width of the melting zone meets the requirements, start the regional melting according to the set program. The annular quartz boat performs a clockwise or counterclockwise uniform circular motion. During this process, the pressure of the protective gas in the sealed box is maintained at the standard atmospheric pressure.

[0022] S6, controlling the heating coil to stop heating and retreating from the notch in sequence to leave the annular quartz boat, maintaining the air pressure in the sealed box at the standard atmospheric pressure until the high-purity metal ingot in the annular quartz boat cools to room temperature;

[0023] S7. Open the sealed door, take out the high-purity metal ingot, cut off 5-15% of the two ends with higher impurity content according to the distribution pattern of impurities in the length direction of the high-purity metal ingot, remelt, cast and test the remaining high-purity metal ingot, and seal and package it after the ingredients meet the standards.

[0024] When preparing high-purity metal, the present invention uses refined metal (99.99%) as raw material, fills the raw material into the corresponding arc quartz boat, and then connects multiple arc quartz boats to form an annular quartz boat with a gap. Driven by a coil driving device, multiple groups of heating coils are put on the annular quartz boat to heat the refined metal raw material. An encoder is used in conjunction with a stepping motor to accurately control the rotation of the driving motor. The annular quartz boat rotates under the drive of the rotating driving wheel to realize the movement of the molten zone.

[0025] The present invention discloses an apparatus and method for efficiently preparing high-purity metals by annular horizontal zone melting, wherein high-purity argon or other protective gases are used instead of high vacuum, and a stepper motor is used to accurately control the movement of a mechanical device to achieve the purpose of accurately controlling the movement of a melting zone. In addition, multiple heating coils and multiple arc quartz boats are designed to be connected in series to increase the zone melting output, thereby being able to efficiently and stably produce high-purity metals of 6N and above.

[0026] At the same time, by taking the device of the present invention as the basic unit and connecting multiple sets of devices in parallel, and expanding production through multi-directional parallel connection, the production cost can be reduced, the production efficiency and the level of equipment automation can be improved, the needs of large-scale industrial production can be met, and the efficiency, practicality and stability of the regional smelting process can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 The present invention is a schematic diagram of the overall structure of a device for efficiently preparing high-purity metal by annular horizontal zone smelting.

[0029] Figure 2 It is a schematic diagram of the structure of the arc quartz boat in the present invention.

[0030] Figure 3 It is a schematic structural diagram of the quartz boat supporting and moving device in the present invention.

[0031] Figure 4 It is a schematic diagram of the structure of the coil driving device in the present invention.

[0032] In the figure: 1-sealed box, 2-arc quartz boat, 3-quartz boat supporting moving device, 4-coil driving device, 5-heating coil, 6-sealed door, 7-air inlet, 8-exhaust port, 9-raw material containing groove, 10-clamping part, 11-annular quartz boat, 12-arc transmission support, 13-rotating driving wheel, 14-support wheel, 15-coupling 1, 16-driving motor 1, 17-limit baffle, 18-driving motor 2, 19-coupling 2, 20-screw, 21-screw slider. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] Example:

[0037] The present invention provides a device for efficiently preparing high-purity metal by annular horizontal zone melting, such as Figure 1 As shown, it includes a sealed box 1, an arc quartz boat 2, a quartz boat support moving device 3, a coil driving device 4 and a heating coil 5.

[0038] A sealing door 6 is provided on the side of the sealed box body 1, and an air inlet 7 and an air exhaust port 8 with corresponding valves are respectively provided on the two opposite side walls of the sealed box body 1, and the air exhaust port 8 is externally connected to a vacuum pump.

[0039] The present invention also installs a box sealing detector at the sealing door 6 to ensure that the sealing of the sealed box 1 meets the requirements after the sealing door 6 is closed.

[0040] like Figure 2 As shown, a raw material containing groove 9 is provided in the arc quartz boat 2 along its arc direction, and matching clamping parts 10 are provided at both ends of the arc quartz boat. Several arc quartz boats 2 are connected in series end to end to form an annular quartz boat 11 with a gap, wherein the design standard of the gap is to leave enough space for the insertion of the heating coil 5.

[0041] The annular quartz boat 11 in the present invention is designed to be a combination of multiple arc quartz boats 2 in series, mainly for the purpose of leaving multiple impurity element enrichment areas to improve product purity.

[0042] In a further specific embodiment, radial inner walls on both sides of the raw material receiving groove 9 are provided with a draft angle of 3 to 5 degrees, so as to facilitate the high-purity metal ingot to be removed from the annular quartz boat 11 .

[0043] Furthermore, the minimum arc angle of the arc quartz boat 2 is 16 degrees, and the maximum arc angle does not exceed 120 degrees; the arc diameter of the arc quartz boat 2 is greater than 500 mm and less than or equal to 1800 mm. If the arc diameter of the arc quartz boat 2 exceeds 1800 mm, in addition to the quartz boat support moving device 3, a corresponding support device needs to be added, and in order to ensure the effect, the number of heating coils 5 also needs to be increased synchronously.

[0044] In this embodiment, the arc diameter of the arc quartz boat 2 is 1000 mm, and the arc angle is 40 degrees. Of course, the arc quartz boat 2 can also be designed to have other arc diameters and radians to be connected in series to form a longer arc.

[0045] like Figure 1 As shown, the quartz boat supporting moving device 3 and the coil driving device 4 are both provided with multiple ones and are arranged in an interlaced circular radial manner in the inner cavity of the sealed box. The quartz boat supporting moving device 3 can support the annular quartz boat 11 and drive the annular quartz boat 11 to rotate clockwise or counterclockwise at a uniform speed; the coil driving device 4 is connected to the heating coil 5 at one end close to the annular quartz boat 11, and the coil driving device 4 can drive the heating coil 5 to move forward from the notch to cover the annular quartz boat 11 or move backward to leave the annular quartz boat 11.

[0046] In a further specific embodiment, Figure 3 As shown, the quartz boat supporting and moving device 3 includes an arc-shaped transmission support 12 installed in the inner cavity of the sealed box body, and a rotating driving wheel 13 and a plurality of supporting wheels 14 are arranged and rotatably installed in the middle of the arc-shaped transmission support 12 along the arc direction, and one side driving shaft end of the rotating driving wheel 13 extends out of the arc-shaped transmission support 12 and is connected to a driving motor 16 arranged outside the arc-shaped transmission support 12 through a coupling 15. The driving motor 16 drives the rotating driving wheel 13 to rotate, so as to drive the annular quartz boat 11 thereon to rotate clockwise or counterclockwise at a uniform speed.

[0047] Furthermore, limiting baffles 17 for limiting the arc quartz boat 2 from escaping are provided on the upper parts of the two radial side walls of the arc-shaped transmission support 12 .

[0048] In a further specific embodiment, Figure 4 As shown, the coil driving device 4 includes a driving motor 18 installed at the bottom of the inner cavity of the sealed box, the output shaft of the driving motor 18 faces the annular quartz boat 11, and the output shaft is connected to a screw 20 through a coupling 19, and the screw slider 21 on the screw 20 is connected to the vertically placed heating coil 5. The heating coil 5 is driven by the screw 20 to perform linear motion, and then moves forward to cover the annular quartz boat 11 or moves backward to leave the annular quartz boat 11.

[0049] Furthermore, the heating coil 5 is a copper coil, which is electrically connected to a temperature control device disposed outside the sealed box 1 .

[0050] In this embodiment, five corresponding groups of quartz boat support moving devices 3 , coil driving devices 4 and heating coils 5 are specifically provided.

[0051] In the present invention, a device for efficiently preparing high-purity metal by an annular horizontal regional smelting is used as a single device unit, and multiple device units can be connected in parallel to achieve production expansion, so as to further reduce production costs, improve production efficiency and equipment automation level, meet the needs of large-scale industrial production, and improve the efficiency, practicality and stability of the regional smelting process.

[0052] The present invention also provides a method for efficiently preparing high-purity metal by annular horizontal zone melting, and the device for efficiently preparing high-purity metal by annular horizontal zone melting mentioned above is used, and the specific steps are as follows:

[0053] S1, placing refined metal raw materials (in block or powder form) obtained by pyrometallurgy or electrolytic refining into a circular quartz boat 2 with a circular diameter of 1000 mm and an arc angle of 40 degrees, and connecting multiple circular quartz boats 2 in series end to end to form a ring-shaped quartz boat 11 with a gap;

[0054] S2, open the sealing door 6 on the side of the sealing box 1, put the annular quartz boat 11 on the corresponding multiple quartz boat supporting and moving devices 3, and ensure that the annular quartz boat 11 is in close contact with the arc-shaped transmission support 12;

[0055] S3, the quartz boat support moving device 3 drives the annular quartz boat 11 to rotate, and at the same time, the coil driving device 4 drives the heating coil 5 to move forward from the notch and cover the annular quartz boat 11 in sequence;

[0056] The heating coil 5 is a copper coil, wherein the cross section of the copper coil is a rectangle of 8 mm×8 mm, and is clamped and mounted on a screw slider 21 in the coil driving device 4. The screw slider 21 is driven by the screw 20 to make the heating coil 5 move linearly; when the zone melting begins, the heating coil 5 moves forward and is covered with the annular quartz boat 11; when the zone melting ends, the heating coil 5 moves backward and leaves the annular quartz boat 11;

[0057] S4. Close the sealing door 6, tighten the screws and ensure that the sealing of the sealing box 1 meets the requirements, then turn on the vacuum pump to exhaust air until the pressure is 1 to 1×10 -6 Pa, close the valve of the exhaust port 8; then open the valve of the air inlet 7 to introduce the protective gas, and keep the pressure at the standard pressure for 5 to 10 minutes; after repeating the above-mentioned gas replacement operation three times, finally keep the pressure in the sealed box 1 at the standard atmospheric pressure, and prepare to start the regional melting;

[0058] In this step, the protective gas introduced is argon with a purity higher than 99.99% (or other protective gases, i.e., a mixed gas of reducing gas added to argon, for example, adding 0-X% hydrogen, which is helpful for removing oxygen group impurity elements);

[0059] That is to say, the protective gas can be all argon (hydrogen usage is 0). By using all inert gas as the protective gas, this is suitable for some metals that cannot use hydrogen, such as metal tellurium;

[0060] Alternatively, the protective gas is a mixed gas formed by a combination of hydrogen and argon (the amount of hydrogen is not higher than X%). Generally, the amount of hydrogen added is not higher than 5%. If it is higher, there will be a risk of explosion.

[0061] S5, the temperature control device controls the temperature of the heating coil 5 to the required temperature, and after observing that the width of the melting zone meets the requirements, the zone melting is started according to the set program; the annular quartz boat 11 moves in a clockwise or counterclockwise uniform circular motion at a speed of 0.5-6° / h (different from the linear speed mm / h of the traditional horizontal zone melting or vertical zone melting, expressed in angle). Since five heating coils 5 are set, single-circle multiple zone melting can be achieved; in this process, the argon gas pressure in the sealed box 1 is maintained at the standard atmospheric pressure;

[0062] In this step, the arc quartz boat 2 and multiple groups of heating coils 5 are used to cooperate, which greatly improves the regional melting efficiency;

[0063] S6, the temperature control device controls the heating coil 5 to stop heating and retreat from the annular quartz boat 11 from the notch in sequence, and keeps the air pressure in the sealed box 1 at the standard atmospheric pressure until the high-purity metal ingot in the annular quartz boat 11 cools to room temperature;

[0064] S7, open the sealed door 6, take out the high-purity metal ingot, cut off 5-15% of the two ends with higher impurity content according to the distribution pattern of impurities in the length direction of the high-purity metal ingot, remelt the remaining high-purity metal ingot, cast it, test the composition and seal it after it meets the standard.

[0065] The device of the present invention can efficiently realize the efficient and stable production of high-purity metals of 6N and above. Moreover, taking the device of the present invention as the basic unit, through multi-directional parallel expansion, the production cost can be reduced, the production efficiency and the equipment automation level can be improved, and the needs of industrialized production can be met.

[0066] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0067] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for efficiently preparing high-purity metal by annular horizontal zone smelting, characterized in that: The invention comprises a sealed box, an arc quartz boat, a quartz boat supporting and moving device, a coil driving device and a heating coil, wherein a sealed door is provided on the side of the sealed box, and an air inlet and an air exhaust port with corresponding valves are respectively provided on the opposite side walls of the sealed box, and the air exhaust port is externally connected to a vacuum pump; a raw material accommodating groove is provided in the arc quartz boat along its arc direction, and matching clamping parts are provided at both ends of the arc quartz boat, and a plurality of the arc quartz boats are connected in series end to end to form an annular quartz boat with a gap; the quartz boat supporting and moving device and the coil driving device are both provided with a plurality of them and are arranged in an interlaced annular radial manner in the inner cavity of the sealed box, and the quartz boat supporting and moving device can support the annular quartz boat and drive the annular quartz boat to rotate at a uniform speed clockwise or counterclockwise; the coil driving device is connected to the heating coil at one end close to the annular quartz boat, and the coil driving device can drive the heating coil to move forward from the gap to cover the annular quartz boat or to move backward to leave the annular quartz boat.

2. The device for efficiently preparing high-purity metal by annular horizontal zone melting according to claim 1 is characterized in that: The inner walls on both sides of the raw material containing groove in the radial direction are provided with a draft angle of 3 to 5 degrees.

3. The device for efficiently preparing high-purity metal by annular horizontal zone melting according to claim 1 is characterized in that: The minimum arc angle of the arc quartz boat is 16 degrees, and the maximum arc angle does not exceed 120 degrees; the arc diameter of the arc quartz boat is greater than 500 mm and less than or equal to 1800 mm.

4. The device for efficiently preparing high-purity metal by annular horizontal zone smelting according to claim 1 is characterized in that: The quartz boat supporting and moving device includes an arc-shaped transmission support installed in the inner cavity of the sealed box body, a rotating driving wheel and a plurality of supporting wheels are arranged and rotatably installed in the middle of the arc-shaped transmission support along an arc direction, one side driving shaft end of the rotating driving wheel extends out of the arc-shaped transmission support, and is connected to a driving motor 1 arranged on the outside of the arc-shaped transmission support through a coupling 1.

5. The device for efficiently preparing high-purity metal by annular horizontal zone smelting according to claim 4 is characterized in that: The upper parts of the radial sides of the arc-shaped transmission support are provided with limiting baffles for limiting the escape of the arc quartz boat.

6. The device for efficiently preparing high-purity metal by annular horizontal zone melting according to claim 1 is characterized in that: The coil driving device includes a second driving motor installed at the bottom of the inner cavity of the sealed box. The output shaft of the second driving motor faces the annular quartz boat, and the output shaft is connected to a screw through a second coupling. The screw slider on the screw is connected to the vertically placed heating coil.

7. The device for efficiently preparing high-purity metal by annular horizontal zone melting according to claim 1 or 6, characterized in that: The heating coil is a copper coil, and the copper coil is electrically connected to a temperature control device arranged outside the sealed box.

8. The device for efficiently preparing high-purity metal by annular horizontal zone melting according to claim 1 is characterized in that: A box sealing detector is installed at the sealing door.

9. The device for efficiently preparing high-purity metal by annular horizontal zone melting according to claim 1, characterized in that: If a device for efficiently preparing high-purity metal by smelting in an annular horizontal area is used as a single device unit, multiple device units can be connected in parallel to achieve production expansion.

10. A method for efficiently preparing high-purity metal by annular horizontal zone smelting, characterized in that: The device for efficiently preparing high-purity metal by annular horizontal zone melting as described in any one of claims 1 to 9 comprises the following specific steps: S1. Putting refined metal raw materials obtained by pyrometallurgy or electrolytic refining into a circular quartz boat, and connecting multiple circular quartz boats in series end to end to form a ring-shaped quartz boat with a gap; S2, opening the sealing door of the sealing box, and placing the annular quartz boat on the corresponding multiple quartz boat supporting and moving devices; S3, the quartz boat support moving device drives the annular quartz boat to rotate, and at the same time, the coil driving device drives the heating coil to move forward from the notch and cover the annular quartz boat in sequence; S4. After closing the sealing door and ensuring that the sealing of the sealing box meets the requirements, turn on the vacuum pump to exhaust air until the pressure is 1~1×10 -6 Pa, close the valve of the exhaust port; then open the valve of the air inlet to introduce protective gas, and keep the pressure at the standard pressure for 5 to 10 minutes; after repeating the above gas replacement operation several times, finally keep the air pressure in the sealed box at the standard atmospheric pressure, and prepare to start regional melting; S5. Control the temperature of the heating coil to the required temperature. After observing that the width of the melting zone meets the requirements, start the regional melting according to the set program. The annular quartz boat performs a clockwise or counterclockwise uniform circular motion. During this process, the pressure of the protective gas in the sealed box is maintained at the standard atmospheric pressure. S6, controlling the heating coil to stop heating and retreating from the notch in sequence to leave the annular quartz boat, maintaining the air pressure in the sealed box at the standard atmospheric pressure until the high-purity metal ingot in the annular quartz boat cools to room temperature; S7. Open the sealed door, take out the high-purity metal ingot, cut off 5-15% of the two ends with higher impurity content according to the distribution pattern of impurities in the length direction of the high-purity metal ingot, remelt, cast and test the remaining high-purity metal ingot, and seal and package it after the ingredients meet the standards.

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