Sublimation equipment for metal purification

Abstract

The invention relates to the technical field of metal purification, in particular to sublimation equipment for metal purification, which comprises a thermal sublimation furnace, a heating base and a collecting tank group, an electromagnetic coil panel is arranged on the inner side of the heating base and is used for heating and sublimating metal in the thermal sublimation furnace; the thermal sublimation furnace comprises a heating furnace cylinder, a supporting ring, a cooling collecting cabin, a first-stage filter cabin and a second-stage filter cabin, the first-stage filter cabin and the second-stage filter cabin are detachably fixed to the inner side of the supporting ring, a filter disc is detachably installed on the bottom face of the cooling collecting cabin, and a hot air inlet and a communicating pipe are arranged on the surface of the heating furnace cylinder and the surface of the cooling collecting cabin respectively. According to the heat sublimation furnace, under blocking of the first-stage filter cabin, rotational flow air flow provides stable annular air flow in the heat sublimation furnace, the contact area of the air flow and metal is increased, the air flow is prevented from being excessively concentrated or non-uniformly distributed, so that more uniform sublimation of the metal is promoted, the stability of the air flow in the sublimation furnace is also favorably maintained due to the rotation characteristic of the air flow, and the heat sublimation effect is improved. Local temperature fluctuation caused by uneven airflow is avoided, and then sublimation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal purification, in particular to sublimation equipment for metal purification. Background Art

[0002] Among existing metal purification technologies, sublimation is a common purification method, which heats the metal to its sublimation temperature to convert it directly from solid to gas, and then cools and condenses the gaseous metal into pure solid metal in a condensation zone.

[0003] Traditional sublimation equipment for metal purification usually consists of a heating zone, an airflow channel, a condensation zone and an exhaust gas treatment system. Its typical structure includes: a heating zone, an airflow channel, a condensation zone and an exhaust gas treatment system. The specific analysis of each of the above zones is as follows: Heating zone: The heating zone of traditional sublimation equipment usually consists of a closed heating chamber to hold the metal raw material to be purified. The heating chamber is equipped with a heating source (such as an electric heating element or a high-frequency heating device), which is used to provide sufficient temperature for the metal to reach the sublimation state. The design of the heating chamber is usually simple, lacking airflow guidance and stabilization devices, so the airflow distribution is prone to unevenness during the heating process, resulting in poor metal sublimation effect, and the metal in some areas may not reach the sublimation temperature evenly.

[0004] Airflow channel: In traditional equipment, the airflow channel is generally simple, usually a direct pipeline structure, and the airflow carries the sublimated metal vapor through the channel to the condensation area. Due to the lack of a specific airflow control structure, the airflow is unevenly distributed in the channel and lacks stability, resulting in the inability to effectively and stably transport the sublimated metal vapor to the condensation area. Vapor reflux and retention may occur in the channel, affecting the metal collection efficiency.

[0005] Condensation zone: The condensation zone is used to cool the sublimated metal vapor and re-condense it into solid metal. The condensation zone in traditional equipment is usually achieved through natural cooling or a simple external cooling system. The common structure is a condensation plate or condensation tube, and the airflow gradually cools down when passing through these condensation surfaces. However, the design of the traditional condensation zone lacks fine control of airflow pressure increase and pressure reduction, and the condensation effect is poor. Incompletely condensed metal vapor may continue to float in the airflow due to insufficient temperature, resulting in a decrease in metal recovery rate. In addition, due to the simple design of the condensation area, some metal vapor will adhere to the wall of the condensation zone, affecting the collection efficiency and causing metal waste.

[0006] Exhaust treatment system: Exhaust treatment system is used to discharge excess airflow from traditional systems, but the design is relatively simple, usually directly discharging exhaust gas through the exhaust pipe, without fully collecting and cooling the residual metal particles. This design causes the residual metal particles in the exhaust gas to be directly discharged into the environment, causing resource waste and environmental pollution.

[0007] In view of this, research and improvement are carried out on the existing problems, and a sublimation equipment for metal purification is provided to solve the current problems. The purpose is to solve the problems and improve the practical value through this technology. Summary of the invention

[0008] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0009] To this end, the technical solution adopted by the present invention is: a sublimation device for metal purification, comprising: a thermal sublimation furnace, a heating base and a collection tank group, the inner side of the heating base is provided with an electromagnetic coil disk for heating and sublimating the metal inside the thermal sublimation furnace, the thermal sublimation furnace comprises a heating furnace barrel, a supporting ring, a cooling collection cabin and a primary filter cabin and a secondary filter cartridge detachably fixed to the inner side of the supporting ring, the bottom surface of the cooling collection cabin is detachably installed with a filter disk, the surfaces of the heating furnace barrel and the cooling collection cabin are respectively provided with a hot gas inlet and a connecting pipe, the surface of the supporting ring is provided with a spacer ring, and the two sides of the spacer ring are respectively provided with a primary airway and a secondary airway, the outer side of the spacer ring is fixedly provided with a plurality of guide vanes, and the surface of the primary filter cabin is provided with a There are filter mesh holes located below the support ring, and a number of swirl cones are fixedly installed on the inner side of the secondary filter cartridge. The tangential direction of the swirl cone is provided with a swirl airway connected to the secondary airway, and the bottom surface of the filter plate is provided with a guide seat connected to the swirl cone; the collection tank group includes a stacked flow tank, a liquid cooling tank and a collection plate group, the liquid cooling tank is fixedly installed on the top surface of the stacked flow tank, the collection plate group is detachably sleeved on the inner side of the stacked flow tank, and the outer periphery of the collection plate group is in interference fit with the inner side of the stacked flow tank, the inner side of the liquid cooling tank is provided with a liquid cooling cavity, the top surface of the liquid cooling tank is provided with an exhaust port, and the collection plate group includes a number of first collection plates and second collection plates arranged in an axial straight line, and the surface of the second collection plate is provided with an air guide port. This structure provides a complete functional chain of heating, sublimation, condensation and tail gas treatment through the synergistic effect of multiple components, making the metal purification process more efficient and systematic, and improving the overall performance of the equipment.

[0010] In a preferred example, the present invention can be further configured as follows: the electromagnetic coil disk inside the heating base is arranged in a direction perpendicular to the bottom surface of the thermal sublimation furnace, and a heat-conducting pad is provided inside the heating base to fit the bottom surface of the heating furnace drum, the heat-conducting pad and the heating furnace drum are metal components, and a control panel is provided on the surface of the heating base. The fitting design of the electromagnetic coil disk and the heat-conducting pad ensures efficient energy transfer during the heating process, reduces heat loss, and ensures the stability and uniformity of the metal sublimation process.

[0011] In a preferred example, the present invention can be further configured as follows: the primary airway and the secondary airway on the surface of the support ring are respectively located between the outer side of the diaphragm ring and the inner wall of the heating furnace barrel and between the inner side of the diaphragm ring and the outer side of the secondary filter cartridge, the guide vanes are arranged in a spiral shape, and the guide vanes are used to guide the swirl motion of the airflow inside the primary airway. Through the cooperation of the primary airway, the secondary airway and the guide vanes, a stable swirl airflow is formed, which significantly improves the contact efficiency between the airflow and the metal, and ensures the uniform sublimation of the metal.

[0012] In a preferred example, the present invention can be further configured as follows: the filter mesh holes on the surface of the first filter cabin are used to introduce the airflow inside the heating furnace into the inner side of the first filter cabin, and the swirl cone and the swirl airway are vertically downwardly connected to the inner side of the first filter cabin. The design of airflow introduction through the filter mesh holes and airflow discharge through the swirl airway avoids the reflux and retention of metal vapor, ensures that the sublimated vapor is smoothly introduced into the condensation area, and improves the metal collection efficiency.

[0013] In a preferred example, the present invention can be further configured as follows: the cyclone airway is a conical cylindrical structure, and the top of the cyclone airway is perpendicular to the guide seat and the inner side of the filter plate, the filter plate is used to guide the airflow into the inner side of the cooling collection cabin and block the condensed metal from falling, and the surface of the filter plate is provided with densely distributed air guide micropores. The conical structure of the cyclone airway is used to achieve airflow pressurization, and combined with the micropore design of the filter plate, it is ensured that the mixed airflow is quickly introduced into the cooling collection cabin and efficiently condensed.

[0014] In a preferred example, the present invention can be further configured as follows: the cooling collection cabin is a thin metal cover structure to facilitate low-temperature condensation of the airflow inside the cooling collection cabin, and the top surface of the cooling collection cabin inner cavity is spherical concave, and the inner cavity surface of the cooling collection cabin is provided with an anti-adhesion coating, the coating material is a fluoride or ceramic material, and the coating is used to prevent condensed metal particles from adhering to the inner cavity surface of the cooling collection cabin. The special shape of the cooling collection cabin and the anti-adhesion coating further improve the condensation effect, prevent metal particles from adhering and losing, and improve the metal collection efficiency.

[0015] In a preferred example, the present invention can be further configured as follows: the surface of the liquid cooling tank is provided with a liquid inlet and a liquid outlet connected to the liquid cooling cavity, which are used to connect to the water cooling circulation pipeline. Through the connection between the liquid cooling cavity and the water cooling circulation pipeline, the condensation system is continuously cooled, the low temperature environment of the condensation area is maintained, and the condensation efficiency is improved.

[0016] In a preferred example, the present invention can be further configured as follows: the cascade tank and the liquid cooling tank are metal components, and the first collection tray and the second collection tray abut against the inner side of the cascade tank for heat conduction, and the first collection tray and the second collection tray are conical trays. Through the conical design and heat conduction of the first collection tray and the second collection tray, the residual metal particles in the exhaust gas are effectively captured, and the exhaust gas purification efficiency is further improved.

[0017] The present invention effectively solves the problems of low metal purification efficiency, poor condensation effect and incomplete tail gas treatment in the prior art through precise airflow control, multi-stage condensation design and efficient tail gas treatment structure, and significantly improves the metal purification effect and the performance of the equipment.

[0018] The beneficial effects achieved by the present invention are: 1. In the present invention, under the barrier of the first-stage filter cabin, the swirl airflow provides a stable annular airflow inside the thermal sublimation furnace, increases the contact area between the airflow and the metal, avoids excessive concentration or uneven distribution of the airflow, and thus promotes more uniform sublimation of the metal. The rotational characteristics of the airflow also help maintain the stability of the airflow in the sublimation furnace, avoid local temperature fluctuations caused by uneven airflow, and thus improve the sublimation efficiency. The high-speed rotation of the swirl airflow can increase the turbulence of the airflow, further improving the heat transfer efficiency between the gas and the metal material.

[0019] 2. In the present invention, the airflow at the secondary airway enters the inner side of the cyclone cone through the cyclone airway, and the sublimated metal vapor is discharged along a specific path in cooperation with the conical cyclone cone, so as to avoid vapor reflux or retention inside the equipment, ensure efficient and orderly vapor extraction, and improve the metal collection effect during the purification process. In addition, the condensation of sublimated metal in the mixed airflow can be effectively promoted through the process of pressurization inside the cyclone cone and rapid expansion and decompression after entering the cooling collection cabin. The condensation effect is improved, the metal particles are efficiently collected, and the efficiency and collection purity of the entire purification process are improved.

[0020] 3. In the present invention, the residual sublimated metal particles in the tail gas are further condensed by further cooling the collection tank group and staggered arrangement of the multi-layer collection plates, thereby ensuring the cleanliness of the exhaust gas flow and avoiding the escape of residual metal particles in the tail gas, which is environmentally friendly and avoids waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 A schematic diagram of the cross-sectional structure of a thermal sublimation furnace according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the exploded structure of a heating base according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the exploded structure of a thermal sublimation furnace according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a primary filter cabin and a secondary filter cartridge according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a secondary filter cartridge according to an embodiment of the present invention; Figure 7 A schematic diagram of the cross-sectional structure of a collection tank assembly according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the exploded structure of a collection tank assembly according to an embodiment of the present invention; Fig. 9 This is a schematic diagram of the disassembly structure of a collecting plate group according to an embodiment of the present invention.

[0022] Reference numerals: 100, thermal sublimation furnace; 110, heating furnace barrel; 120, supporting ring; 130, cooling collection cabin; 140, primary filter cabin; 150, secondary filter cartridge; 160, filter plate; 111, hot air inlet; 121, primary airway; 122, secondary airway; 123, guide swirl vane; 131, connecting pipe; 141, filter mesh hole; 151, swirl cone; 152, swirl airway; 161, guide seat; 200, heating base; 210, electromagnetic coil disk; 220, thermal pad disk; 201, control panel; 300, collecting tank group; 310, cascade tank; 320, liquid cooling tank; 330, collecting plate group; 311, inlet; 321, exhaust port; 322, liquid cooling chamber; 331, first collecting tray; 332, second collecting tray; 333, air guide port. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0024] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0025] The following is combined with Figure 1-Figure 9 A sublimation device for metal purification provided by some embodiments of the present invention is described.

[0026] Example 1: Standard sublimation equipment design The device of this embodiment is composed of three main parts: a thermal sublimation furnace 100 , a heating base 200 and a collection tank group 300 .

[0027] The thermal sublimation furnace 100 includes: a heating furnace barrel 110, a support ring 120, a cooling collection cabin 130, a primary filter cabin 140, a secondary filter cartridge 150 and a filter disc 160. Among them, the heating furnace barrel 110 is a metal placement area, and its inner wall is provided with a high temperature resistant protective layer. The support ring 120 is fixed to the top of the heating furnace barrel 110, and the spacer ring on its surface divides the airflow into two paths, which are respectively introduced into the interior of the equipment through the primary air duct 121 and the secondary air duct 122. The primary filter cabin 140 and the secondary filter cartridge 150 are respectively fixed inside the support ring 120 to guide the airflow and filter impurities. The cooling collection cabin 130 is arranged at the top of the thermal sublimation furnace 100 for cooling and collecting condensed metal particles. The filter disc 160 is located at the bottom of the cooling collection cabin 130 and has a porous structure that allows airflow to pass but blocks condensed metal particles.

[0028] The heating base 200 includes: an electromagnetic coil disk 210, a heat-conducting pad 220 and a control panel 201. The electromagnetic coil disk 210 is a high-frequency heating device, which contacts the heat-conducting pad 220 and transfers heat to the metal raw material in the heating furnace 110. The control panel 201 is a control panel for adjusting the heating temperature and equipment operating parameters.

[0029] The collection tank group 300 includes: a stacked flow tank 310, a liquid cooling tank 320 and a collection plate group 330. The liquid cooling tank 320 is provided with a liquid cooling chamber 322 for circulating cooling, and an exhaust port 321 is provided at the top for exhaust gas discharge. The collection plate group 330 is a staggered first collection plate 331 and a second collection plate 332, which are used to further cool down and capture residual metal particles in the exhaust gas.

[0030] Operation process The metal raw material to be purified is placed in the heating furnace drum 110, and the metal reaches the sublimation temperature and changes into gaseous state through the efficient heating of the electromagnetic coil disk 210 and the heat conductive pad disk 220. The sublimated metal vapor enters the surface of the support ring 120 from the hot gas inlet 111 and is divided into two gas flows through the spacer ring: One airflow passes through the primary air passage 121 and the guide vane 123 to form a swirl flow, and forms a stable annular airflow under the obstruction of the primary filter cabin 140, thereby increasing the contact area between the airflow and the metal and ensuring uniform sublimation of the metal; Another airflow enters the cyclone cone 151 through the secondary airway 122, and is guided by the cyclone airway 152 and pressurized into the cooling collection chamber 130, where it rapidly expands and depressurizes, thereby promoting the condensation of the sublimated metal particles.

[0031] The condensed metal particles fall to the surface of the filter disc 160 under the action of gravity and are collected to the outside through periodic cleaning. The condensed airflow enters the collection tank group 300, and is further cooled by the first collection disc 331 and the second collection disc 332. The residual metal particles in the exhaust gas are captured and finally discharged from the exhaust port 321.

[0032] Device application scenarios This embodiment is applicable to conventional metal purification needs, such as the purification of medium-purity metals such as aluminum and copper.

[0033] Embodiment 2: High efficiency enhanced design Structural improvement: Based on the first embodiment, this embodiment has enhanced the following parts: Heating system: The electromagnetic coil disk 210 and the heat conductive pad disk 220 are made of materials with higher thermal conductivity to further optimize the heat energy transfer efficiency.

[0034] The inner wall of the heating furnace drum 110 is coated with a high temperature resistant and anti-oxidation coating to prevent the high temperature environment from damaging the inner wall of the equipment.

[0035] Condensation system: The inner cavity of the cooling collection chamber 130 is designed to be a spherical concave shape, which is conducive to the aggregation of condensed metal particles. At the same time, the inner cavity surface is coated with an anti-adhesion coating to prevent metal particles from adhering to the surface of the condensation area.

[0036] The aperture design of the filter plate 160 porous filter plate structure is further optimized to ensure smooth airflow while completely blocking condensed metal particles.

[0037] Exhaust treatment system: The liquid cooling chamber 322 of the liquid cooling tank 320 is connected to an external water cooling circulation pipeline to achieve continuous circulation of the cooling liquid and long-term low-temperature operation of the condensation zone.

[0038] The surfaces of the first collecting tray 331 and the second collecting tray 332 are provided with flow guiding structures to improve the exhaust gas purification efficiency through reasonable airflow guidance and multi-layer capture.

[0039] Operation process Metal sublimation: The metal raw material is placed inside the heating furnace 110 and is efficiently heated by the electromagnetic coil disk 210 to quickly heat it to the sublimation point. The sublimated metal vapor enters the support ring 120 through the hot gas inlet 111.

[0040] The airflow forms a strong turbulent swirl under the guidance of the guide vane 123, thereby improving the contact efficiency between the airflow and the metal and promoting uniform sublimation of the metal; After being introduced into the swirl cone 151 and pressurized through the secondary air duct 122 , the air is rapidly expanded and depressurized through the cooling and collecting chamber 130 , and condensed into granular metal inside the cooling and collecting chamber 130 .

[0041] Condensation collection: The condensed metal particles settle to the surface of the filter disc 160 under the action of gravity and are regularly cleaned and collected by an external device. After the airflow enters the collection tank group 300, it is further cooled by the staggered first collection disc 331 and the second collection disc 332, and the residual metal particles in the exhaust gas are captured, and finally the clean exhaust gas is discharged through the exhaust port 321.

[0042] This embodiment is suitable for the purification of high-purity metals, especially for metals such as titanium and magnesium that have high requirements for sublimation temperature and condensation efficiency. Through optimized design, the sublimation efficiency, condensation effect and tail gas purification capacity are significantly improved.

[0043] The working principle and use process of the present invention: Metal heating sublimation: The metal to be purified is placed inside the heating furnace tube 110, and the primary filter cabin 140 and the secondary filter cartridge 150 are installed in sequence through the support ring 120, and the cooling collection cabin 130 with the filter disc 160 is fixed to the top of the thermal sublimation furnace 100 for sealing. The thermal sublimation furnace 100 is placed on the heating base 200, and the electromagnetic coil disc 210 generates a high-frequency current to heat the metal inside the thermal sublimation furnace 100 to sublime the metal.

[0044] High-temperature airflow introduction and diversion: The high-temperature airflow is introduced into the sublimation furnace 100 through the hot air inlet 111, and is divided into two airflows on the surface of the support ring 120, and is guided through the primary airway 121 and the secondary airway 122. The airflow in the primary airway 121 is guided by the guide vanes 123 to form a vortex inside the heating furnace tube 110.

[0045] Swirl formation and gas stability: Under the barrier of the primary filter cabin 140, the swirling airflow forms a stable annular airflow, which increases the contact area between the airflow and the metal, avoids airflow concentration or uneven distribution, and promotes more uniform sublimation of the metal. The high-speed rotation of the swirling airflow helps to maintain the stability of the airflow inside the thermal sublimation furnace 100, avoids local temperature fluctuations caused by uneven airflow, and improves sublimation efficiency. At the same time, the turbulent effect of the swirling airflow further enhances the heat transfer effect between the gas and the metal.

[0046] Mixing and leading out of airflow and sublimated metal: After the swirl airflow is mixed with the sublimated metal vapor, it is introduced into the first filter cabin 140 through the filter mesh hole 141. The airflow in the second airway 122 is tangentially introduced into the inside of the swirl cone 151 through the swirl airway 152, so that the sublimated airflow swirls inside the swirl cone 151, and the conical swirl cone 151 generates a beam effect on the airflow, so that the pressure of the airflow inside the swirl cone 151 increases.

[0047] Condensation collection: The filter disc 160 is located at the bottom of the cooling collection chamber 130 and has a porous structure, which allows airflow to pass through but blocks the condensed metal particles. After the swirl airflow is introduced into the cooling collection chamber 130 through the guide seat 161 and the filter disc 160, the compressed airflow inside the cooling collection chamber 130 expands rapidly and the pressure decreases. The pressure inside the cooling collection chamber 130 is quickly released, and due to the rapid decrease in airflow pressure, the sublimated metal particles carried in the airflow are quickly condensed inside the cooling collection chamber 130. The condensed metal particles fall on the surface of the filter disc 160 due to gravity, realizing the effective separation of the airflow and the condensed metal.

[0048] Tail gas treatment: The amount of sublimated metal carried in the condensed airflow is significantly reduced. After the airflow enters the collection tank group 300, it is further cooled by the staggered first collection tray 331 and the second collection tray 332, and the remaining sublimated metal is further condensed inside the first collection tray 331, the second collection tray 332 and the liquid cooling tank 320. This ensures the cleanliness of the exhaust airflow and prevents the sublimated metal remaining in the tail gas from escaping.

[0049] Circulation cooling of the condensation system: A liquid cooling chamber 322 is provided on the inner side of the liquid cooling tank 320, which is connected to a water cooling circulation pipeline. Water cooling circulation is performed through the liquid inlet and the liquid outlet to continuously reduce the overall temperature of the collection tank group 300, ensure complete condensation and collection of metal particles, and improve the efficiency and quality of metal purification.

[0050] The equipment effectively realizes uniform sublimation and efficient condensation separation of metals through reasonable airflow design and multi-stage filtration and condensation systems, thereby improving the metal purification efficiency and purity. The structural design of the filter plate 160 and the cooling collection chamber 130 ensures that the condensed metal particles are not carried away by the airflow, thereby optimizing the metal collection effect.

[0051] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A sublimation device for metal purification, characterized in that: include: A thermal sublimation furnace (100), a heating base (200) and a collection tank group (300), wherein the inner side of the heating base (200) is provided with an electromagnetic coil disk (210) for heating and sublimating metal inside the thermal sublimation furnace (100), and the thermal sublimation furnace (100) comprises a heating furnace cylinder (110), a support ring (120), a cooling collection chamber (130), and a primary filter chamber (140) and a secondary filter chamber (150) detachably fixed to the inner side of the support ring (120). 0), a filter plate (160) is detachably mounted on the bottom surface of the cooling collection chamber (130), a hot gas inlet (111) and a connecting pipe (131) are respectively arranged on the surfaces of the heating furnace barrel (110) and the cooling collection chamber (130), a spacer ring is arranged on the surface of the support ring (120), and a primary air duct (121) and a secondary air duct (122) are respectively arranged on both sides of the spacer ring, and a plurality of guide vanes (123) are fixedly mounted on the outer side of the spacer ring; The collecting tank group (300) comprises a cascade tank (310), a liquid cooling tank (320) and a collecting plate group (330); the liquid cooling tank (320) is fixedly mounted on the top surface of the cascade tank (310); the collecting plate group (330) is detachably sleeved on the inner side of the cascade tank (310); the outer periphery of the collecting plate group (330) is in interference contact with the inner side of the cascade tank (310); a liquid cooling cavity (322) is provided on the inner side of the liquid cooling tank (320); an exhaust port (321) is provided on the top surface of the liquid cooling tank (320); the collecting plate group (330) comprises a plurality of first collecting plates (331) and second collecting plates (332) which are arranged in an axial straight line and staggered; and an air guide port (333) is provided on the surface of the second collecting plate (332).

2. A sublimation device for metal purification according to claim 1, characterized in that: The electromagnetic coil disk (210) on the inner side of the heating base (200) is arranged in a direction perpendicular to the bottom surface of the thermal sublimation furnace (100), and a heat-conducting pad (220) is provided on the inner side of the heating base (200) and is in contact with the bottom surface of the heating furnace cylinder (110). The heat-conducting pad (220) and the heating furnace cylinder (110) are metal components, and a control panel (201) is provided on the surface of the heating base (200).

3. A sublimation device for metal purification according to claim 1, characterized in that: The surface of the primary filter cabin (140) is provided with a filter mesh hole (141) located below the support ring (120); a plurality of cyclone cones (151) are fixedly mounted on the inner side of the secondary filter cartridge (150); a cyclone airway (152) communicating with the secondary airway (122) is provided in a tangential direction of the cyclone cone (151); and a flow guide seat (161) communicating with the cyclone cone (151) is provided on the bottom surface of the filter disc (160).

4. A sublimation device for metal purification according to claim 3, characterized in that: The cyclone airway (152) is in a conical cylindrical structure, and the top of the cyclone airway (152) is vertically opposite to the air guide seat (161) and the inner side of the filter plate (160). The filter plate (160) is used to guide the airflow into the inner side of the cooling collection chamber (130) and prevent the condensed metal from falling. The surface of the filter plate (160) is provided with densely distributed air guide micropores.

5. A sublimation device for metal purification according to claim 4, characterized in that: The filter mesh holes (141) on the surface of the primary filter cabin (140) are used to introduce the airflow inside the heating furnace barrel (110) into the inner side of the primary filter cabin (140), and the cyclone cone (151) and the cyclone air duct (152) are vertically downwardly connected to the inner side of the primary filter cabin (140).

6. A sublimation device for metal purification according to claim 1, characterized in that: The primary air passage (121) and the secondary air passage (122) on the surface of the support ring (120) are respectively located between the outer side of the spacer ring and the inner wall of the heating furnace barrel (110) and between the inner side of the spacer ring and the outer side of the secondary filter cartridge (150), and the guide swirl vanes (123) are arranged in a spiral shape, and the guide swirl vanes (123) are used to guide the swirl motion of the airflow inside the primary air passage (121).

7. The sublimation equipment for metal purification according to claim 1, characterized in that: The cooling collection chamber (130) is a thin metal cover structure that facilitates low-temperature condensation of the airflow inside the cooling collection chamber (130), and the top surface of the inner cavity of the cooling collection chamber (130) is in the shape of a spherical concave surface. The inner cavity surface of the cooling collection chamber (130) is provided with an anti-adhesion coating, and the coating material is a fluoride or ceramic material, and the coating is used to prevent condensed metal particles from adhering to the inner cavity surface of the cooling collection chamber (130).

8. The sublimation equipment for metal purification according to claim 1, characterized in that: The surface of the liquid cooling tank (320) is provided with a liquid inlet and a liquid outlet which are connected to the liquid cooling cavity (322) and are used to connect to a water cooling circulation pipeline.

9. The sublimation equipment for metal purification according to claim 1, characterized in that: The cascade tank (310) and the liquid cooling tank (320) are metal components, and the first collection tray (331) and the second collection tray (332) abut against the inner side of the cascade tank (310) for heat conduction, and the first collection tray (331) and the second collection tray (332) are conical trays.

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