Equipment and method for directly synthesizing aluminum nitride powder from secondary aluminum

Abstract

The invention relates to the technical field of direct synthesis of aluminum nitride powder from secondary aluminum, in particular to equipment and method for direct synthesis of aluminum nitride powder from secondary aluminum. The equipment comprises an equipment body and a connecting plate, a first belt pulley is fixedly mounted at the output end of a driving motor, and an impurity adsorption roller is mounted in a resistance aluminum melting furnace; a second belt pulley is fixedly installed at one end of the impurity adsorption roller, and the first belt pulley and the second belt pulley are connected through a belt body. According to the invention, through the arrangement of the aluminum nitride powder synthesis structure, the assumption that the high-purity aluminum nitride powder is directly synthesized by using 1060 aluminum of the waste aluminum conductor through melting chemistry, gravity impurity removal and refining, nitrogen jet atomization and nitridation is put forward, part of tests are performed, some design control parameters are obtained, and the structure has the advantages that through test analysis, the high-purity aluminum nitride powder can be obtained; the process is feasible from theory to practical application, so that the problems of high raw material requirements, low product percent of pass, unstable quality, low operation flexibility, high production energy consumption and the like in the production process can be solved.

Description

Technical Field

[0001] This invention relates to an equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum, and particularly to an equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum, belonging to the technical field of direct synthesis of aluminum nitride powder from recycled aluminum. Background Technology

[0002] Aluminum nitride (ANH) is a novel ceramic material with exceptionally high thermal conductivity compared to most ceramics. It is one of the most thermally conductive ceramics, second only to beryllium nitride. ANH has a coefficient of thermal expansion very similar to silicon, making it a common substrate material for silicon processing. ANH exhibits high thermal shock resistance, very high resistivity, and a high dielectric constant. It also possesses excellent mechanical properties, including high flexural strength, high Young's modulus, and high Vickers hardness, making it a promising next-generation excellent insulating and heat-dissipating substrate material. It can be widely used in communication devices, high-brightness LEDs, power electronic devices, and machinery manufacturing. AlN is the only stable binary compound, first synthesized in 1877, and has a history of over a century. Since the 1980s, in-depth research has been conducted on AlN as a substrate and packaging material for electronic products, and its excellent performance has led to its widespread application in modern electronic products. AlN materials are highly sensitive to impurities, crystal form, and particle size; therefore, the preparation of high-quality AlN is a crucial step.

[0003] Currently, there are five most researched methods for preparing AlN: direct nitriding of aluminum powder; high-temperature self-propagating method; carbothermal reduction method; gas-phase method; and organic salt pyrolysis method. Although the introduction and absorption of the Japanese carbon reduction method for producing electroplated aluminum has enabled small-batch production, problems such as high raw material requirements, low product qualification rate, unstable quality, limited operational flexibility, high control requirements, and high energy consumption still hinder the development of this industry.

[0004] Therefore, there is an urgent need to improve the equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum in order to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for directly synthesizing aluminum nitride powder from recycled aluminum. The invention proposes a structure for synthesizing aluminum nitride powder, utilizing waste aluminum wire (1060 aluminum) through melt chemical and gravity impurity removal and refining, followed by nitrogen jet atomization and nitriding to directly synthesize high-purity aluminum nitride powder. Some experiments were conducted, and some design control parameters were obtained. The advantage of this structure is that, through experimental analysis, the process is feasible from theory to practical application, thus addressing problems such as high raw material requirements, low product qualification rate, unstable quality, limited operational flexibility, high control requirements, and high energy consumption during production.

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] A device and method for directly synthesizing aluminum nitride powder from recycled aluminum includes a main body and a connecting plate. The main body is provided with an aluminum nitride powder synthesis structure, which includes a resistance melting furnace installed on one side of the main body. The resistance melting furnace has a reagent inlet. A centrifuge structure is provided below the connecting plate. The centrifuge structure includes a drive motor fixedly installed on one side of the main body. A first pulley is fixedly installed at the output end of the drive motor. An impurity adsorption roller is installed inside the resistance melting furnace. A second pulley is fixedly installed at one end of the impurity adsorption roller. The first pulley and the second pulley are connected by a belt body.

[0008] Preferably, a conveying structure is fixedly installed on the connecting plate, a connecting assembly connected to the impurity adsorption roller is fixedly installed at the bottom of the conveying structure, a voltage stabilizer connected to the conveying structure is installed at the top of the main body of the equipment, a high-temperature nitrogen jet device is provided on the voltage stabilizer, a synthesis reactor connected to the high-temperature nitrogen jet device is fixedly installed inside the main body of the equipment, and a cooling collector connected to the main body of the equipment is fixedly installed on one side of the voltage stabilizer.

[0009] Preferably, a pneumatic conveying device is provided on one side of the cooling collector, and the synthesis reactor is connected to the pneumatic conveying device through an air cooler.

[0010] Preferably, the voltage regulator is equipped with a sorting machine connected to the main body of the equipment, and the bottom of the sorting machine is provided with multiple sorters.

[0011] Preferably, a feed pipe is fixedly installed on the top of the synthesis reactor, and a connecting pipe is installed between the air cooler and the feed pipe.

[0012] Preferably, a first filter is fixedly installed at the bottom of the sorting machine, a second filter is fixedly installed on one side of the first filter, and a third filter connected to the sorting machine is fixedly installed at one end of the second filter.

[0013] Preferably, the resistance melting aluminum furnace is provided with a fixing ring, the top of the fixing ring is fitted with a sealing cover, and the sealing cover is fitted with a plurality of screws connected to the fixing ring.

[0014] Preferably, a first flange is fixedly installed at one end of the connecting assembly, a conveying pipe is provided on one side of the connecting assembly, and a second flange connected to the first flange is fixedly installed at one end of the conveying pipe.

[0015] Preferably, a connecting rod is fixedly installed at one end of the resistance melting aluminum furnace, and a temperature display is provided on the connecting rod.

[0016] Preferably, an apparatus and method for directly synthesizing aluminum nitride powder from recycled aluminum includes the following steps:

[0017] S1. When starting the synthesis of aluminum nitride powder, manually sorted waste aluminum wires are first fed into the resistance melting furnace for smelting. After the waste aluminum wires are smelted, the temperature inside the resistance melting furnace is maintained at 700-750 degrees Celsius. Then, the drive motor is started to make the first pulley rotate. Since the second pulley is connected to the first pulley through the belt body, the rotation of the first pulley can also replace the rotation of the second pulley. When the second pulley rotates, the impurity adsorption roller can remove heavy metals such as Si, Fe, and Ni from the interior. Impurities are separated, and the purified high-temperature aluminum liquid is lifted to the interior of the upper voltage stabilizer. Then, the high-temperature nitrogen jet device installed on the voltage stabilizer rapidly atomizes the high-temperature aluminum liquid into tiny spherical aluminum liquid and sends it into the interior of the synthesis reactor. Under the further crushing action of the supersonic high-temperature nitrogen nozzle, the aluminum spheres with nitrided surfaces are further crushed and nitrided, and can spiral upward at a speed of 0.5 m / s and be sprayed into the interior of the cooling collector. Since this reaction is an exothermic reaction, in order to ensure the complete reaction and control the crystal form, nitrogen must be in excess and the pressure and temperature must be stable.

[0018] S2. Through the installation of a pneumatic conveying device, air cooler, separator, and classifier, excess nitrogen gas is separated by precipitation in a cooling collector. Nitrogen gas at a temperature of around 200 degrees Celsius enters the air cooler from the upper outlet pipe of the cooling collector and is cooled to below 60 degrees Celsius. It then enters the screw compressor to increase the nitrogen pressure to 8 kg / cm and enters the jacket heat exchanger of the synthesis reactor for recycling. At the same time, the cooled aluminum nitride powder can be sent into the interior of the separator through the pneumatic conveying device, and then from the separator into the interior of the classifier. The classifier can separate aluminum nitride powder into three grades, classifying aluminum nitride powder of different purities, which facilitates its inspection, packaging, and sale, and avoids affecting the sales price due to different grades of aluminum nitride powder produced.

[0019] S3. Through the setting of the feed pipe and connecting pipe, excess nitrogen is separated by the cooling collector. The nitrogen first enters the interior of the air cooler through the connecting pipe. This method can facilitate the transportation of excess nitrogen. Then, the nitrogen at a temperature of about 200 degrees Celsius is cooled by the air cooler, which can accelerate the cooling rate of high temperature gas and avoid uncontrollable dangerous factors caused by high temperature gas.

[0020] S4. Through the setting of the first, second and third filters, aluminum nitride powder first enters the first filter through the sorting machine, then a portion of the aluminum nitride powder falls into the first sorting device, and then the remaining aluminum nitride powder enters the interior of the second filter. After screening, the remaining aluminum nitride powder enters the second and third sorting devices respectively. Through multiple screenings by the first, second and third filters, the aluminum nitride powder can enter the corresponding sorting device.

[0021] This invention has at least the following beneficial effects:

[0022] By designing an aluminum nitride powder synthesis structure, and proposing the use of waste aluminum wire (1060 aluminum) for direct synthesis of high-purity aluminum nitride powder through melt chemical and gravity impurity removal and refining, followed by nitrogen jet atomization and nitriding, some experiments were conducted, and some design control parameters were obtained. The advantage of this structure is that, through experimental analysis, the process is feasible from theory to practical application, thus addressing problems such as high raw material requirements, low product qualification rate, unstable quality, limited operational flexibility, high control requirements, and high production energy consumption during the production process. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the synthesis reactor structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the sorter structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the conveying structure of the present invention;

[0028] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0029] Figure 6 For the present invention Figure 2 Enlarged view at point B in the middle;

[0030] Figure 7 For the present invention Figure 3 Enlarged view at point C;

[0031] Figure 8 This is a schematic diagram of the drive motor structure of the present invention.

[0032] In the diagram, 1. Main body of the equipment; 2. Connecting plate; 3. Aluminum nitride powder synthesis structure; 4. Resistance melting aluminum furnace; 5. Reagent inlet; 6. Centrifuge structure; 7. Drive motor; 8. First pulley; 9. Impurity adsorption roller; 10. Second pulley; 11. Belt body; 12. Conveying structure; 13. Connecting assembly; 14. Voltage stabilizer; 15. High-temperature nitrogen jet device; 16. Synthesis reactor; 17. Cooling collector; 18. Pneumatic conveying device; 19. Air cooler; 20. Sorter; 21. Sorter; 22. Feed pipe; 23. Connecting pipe; 24. First screener; 25. Second screener; 26. Third screener; 27. Fixing ring; 28. Sealing cover; 29. ​​Screw; 30. First flange; 31. Conveying pipe; 32. Second flange; 33. Connecting rod; 34. Temperature display. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] like Figures 1-8As shown, the present invention provides an equipment for directly synthesizing aluminum nitride powder from recycled aluminum, comprising a main body 1 and a connecting plate 2. An aluminum nitride powder synthesis structure 3 is provided on the main body 1. The aluminum nitride powder synthesis structure 3 includes a resistance melting aluminum furnace 4 installed on one side of the main body 1. The resistance melting aluminum furnace 4 has a reagent inlet 5. A centrifuge structure 6 is provided below the connecting plate 2. The centrifuge structure 6 includes a drive motor 7 fixedly installed on one side of the main body 1. A first pulley 8 is fixedly installed at the output end of the drive motor 7. An impurity adsorption roller 9 is installed inside the resistance melting aluminum furnace 4. A second pulley 10 is fixedly installed at one end of the impurity adsorption roller 9. The first pulley 8 and the second pulley 10 are connected by a belt body 11. A conveying structure 12 is fixedly installed on the connecting plate 2. A connecting assembly 13 connected to the impurity adsorption roller 9 is fixedly installed at the bottom of the conveying structure 12. A voltage stabilizer 14 connected to the conveying structure 12 is installed on the top of the main body 1. A high-temperature nitrogen jet device 15 is installed on the voltage stabilizer 14. A synthesis reactor 16 connected to the high-temperature nitrogen jet device 15 is fixedly installed inside the main body 1. A cooling collector 17 connected to the main body 1 is fixedly installed on one side of the voltage stabilizer 14. Through the setting of the aluminum nitride powder synthesis structure 3, and proposing the idea of ​​using waste aluminum wire 1060 aluminum, through melt chemical and gravity impurity removal and refining, and nitrogen jet atomization and nitriding, to directly synthesize high-purity aluminum nitride powder, some experiments were conducted and results were obtained. Some design control parameters are specified. When the synthesis of aluminum nitride powder begins, manually sorted waste aluminum wires are first fed into the resistance melting aluminum furnace 4 for smelting. After the waste aluminum wires are smelted, the temperature inside the resistance melting aluminum furnace 4 is maintained at 700-750 degrees Celsius. Then, the drive motor 7 is started to drive the first pulley 8 to rotate. Since the second pulley 10 is connected to the first pulley 8 through the belt body 11, the rotation of the first pulley 8 can also replace the rotation of the second pulley 10. When the second pulley 10 rotates, the impurity adsorption roller 9 can separate the heavy metals such as Si, Fe, and Ni inside it and lift the purified high-temperature aluminum liquid to the interior of the upper voltage regulator 14. Then, the voltage regulator 14... The high-temperature nitrogen jet device 15 installed on the 4 rapidly atomizes the high-temperature aluminum liquid into tiny spherical aluminum liquid and sends it into the interior of the synthesis reactor 16. Under the further crushing action of the supersonic high-temperature nitrogen nozzle, the aluminum spheres with nitrided surfaces are further crushed and nitrided, and can spiral upward at a speed of 0.5 m / s and be sprayed into the interior of the cooling collector 17. Since this reaction is an exothermic reaction, in order to ensure the complete reaction and control the crystal form, nitrogen must be in excess and the pressure and temperature must be stable. The advantage of this structure is that, through experimental analysis, this process is feasible from theory to practical application, thereby solving problems such as high raw material requirements, low product qualification rate, unstable quality, small operational flexibility, high control requirements, and high production energy consumption in the production process.

[0035] like Figure 1 As shown, a pneumatic conveying device 18 is provided on one side of the cooling collector 17. The synthesis reactor 16 is connected to the pneumatic conveying device 18 via an air cooler 19. A separator 20 connected to the main body 1 is installed on the pressure stabilizer 14. Multiple separators 21 are provided at the bottom of the separator 20. Through the arrangement of the pneumatic conveying device 18, air cooler 19, separator 20, and separators 21, excess nitrogen is separated by precipitation in the cooling collector 17. Nitrogen at a temperature of about 200 degrees Celsius enters the air cooler from the upper outlet pipe of the cooling collector 17. The nitrogen gas is cooled to below 60 degrees Celsius by the compressor and then enters the synthesis reactor 16 for jacket heat exchange and recycling. Meanwhile, the cooled aluminum nitride powder can be sent into the sorting machine 20 through the pneumatic conveying device 18, and then from the sorting machine 20 into the sorter 21. The sorter 21 can sort into three grades, and aluminum nitride powder of different purity levels can be classified, which facilitates its inspection, packaging and sale, and avoids the impact of different grades of aluminum nitride powder on the sales price.

[0036] like Figure 2 As shown, a feed pipe 22 is fixedly installed on the top of the synthesis reactor 16. A connecting pipe 23 is installed between the air cooler 19 and the feed pipe 22. Through the feed pipe 22 and the connecting pipe 23, excess nitrogen is separated by precipitation in the cooling collector 17. The nitrogen first enters the interior of the air cooler 19 through the connecting pipe 23. This method can facilitate the transportation of excess nitrogen. Then, the nitrogen at a temperature of about 200 degrees Celsius is cooled by the air cooler 19, which can accelerate the cooling rate of high-temperature gas and avoid uncontrollable dangerous factors caused by high-temperature gas.

[0037] like Figure 2 As shown, a first filter 24 is fixedly installed at the bottom of the sorter 20, a second filter 25 is fixedly installed on one side of the first filter 24, and a third filter 26 connected to the sorter 21 is fixedly installed at one end of the second filter 25. Through the arrangement of the first filter 24, the second filter 25 and the third filter 26, aluminum nitride powder first enters the first filter 24 through the sorter 20, then a portion of the aluminum nitride powder falls into the first sorter 21, and then the remaining aluminum nitride powder enters the interior of the second filter 25. After screening, the remaining aluminum nitride powder enters the second and third sorters 21 respectively. Through multiple screenings by the first filter 24, the second filter 25 and the third filter 26, the aluminum nitride powder can enter the corresponding sorter 21.

[0038] like Figure 5As shown, the resistance aluminum melting furnace 4 is equipped with a fixing ring 27, and a sealing cover 28 is installed on the top of the fixing ring 27. Multiple screws 29 connected to the fixing ring 27 are installed on the sealing cover 28. Through the arrangement of the fixing ring 27, the sealing cover 28, and the screws 29, after the waste aluminum wire is fed into the resistance aluminum melting furnace 4, the sealing cover 28 is placed on the fixing ring 27, and then the multiple screws 29 are used to fix the sealing cover 28 to the fixing ring 27, thereby sealing the resistance aluminum melting furnace 4. This prevents heat leakage during the melting of the waste aluminum wire, which could lead to unsatisfactory melting results. Furthermore, after the waste aluminum wire is melted, the temperature inside the resistance aluminum melting furnace 4 needs to be maintained at 700-750 degrees Celsius. Therefore, sealing the fixing ring 27 with the sealing cover 28 makes it easier to maintain the temperature inside the resistance aluminum melting furnace 4. After the multiple screws 29 are detached from the sealing cover 28, the sealing cover 28 can be opened, making it convenient for personnel to open the sealing cover 28 and feed waste aluminum wire into the resistance aluminum melting furnace 4.

[0039] like Figure 6 As shown, a first flange 30 is fixedly installed at one end of the connecting assembly 13, and a conveying pipe 31 is provided on one side of the connecting assembly 13. A second flange 32, which is connected to the first flange 30, is fixedly installed at one end of the conveying pipe 31. With the arrangement of the first flange 30, the conveying pipe 31, and the second flange 32, when the conveying pipe 31 is spliced ​​with the connecting assembly 13, the second flange 32 and the first flange 30 will fit together. The advantage of using the second flange 32 and the first flange 30 to connect the conveying pipe 31 and the connecting assembly 13 is that only the second flange needs to be connected. The bolt holes of flange 32 and conveying pipe 31 are aligned, and then the bolts are inserted and the nuts are tightened to complete the connection. Compared with welding and other connection methods, no special welding equipment and complex welding process are required, which greatly shortens the installation time. The connection between the second flange 32 and the first flange 30 is made by tightly connecting the two together with multiple bolts, which can evenly distribute the axial force, radial force and bending moment and other stresses in the conveying pipe 31 and the connecting assembly 13 system to each bolt and the second flange 32 and the first flange 30, thereby improving the load-bearing capacity of the connection.

[0040] like Figure 7As shown, a connecting rod 33 is fixedly installed at one end of the resistance aluminum melting furnace 4, and a temperature display 34 is installed on the connecting rod 33. Through the setting of the connecting rod 33 and the temperature display 34, the temperature display 34 can be fixedly installed at one end of the resistance aluminum melting furnace 4. The temperature display 34 can display the internal temperature of the resistance aluminum melting furnace 4 in real time. The temperature display 34 can accurately control the temperature of the resistance aluminum melting furnace 4 and the cooling medium, so that the waste aluminum wire is heat-treated under the optimal temperature conditions, shortening the heat treatment cycle and improving production efficiency. After the waste aluminum wire is melted, it is necessary to maintain the temperature in the resistance aluminum melting furnace 4. Therefore, the temperature display 34 can more easily and intuitively show the temperature changes in the resistance aluminum melting furnace 4, so that personnel can adjust the internal temperature of the resistance aluminum melting furnace 4 at any time.

[0041] In this embodiment, as Figures 1-8 As shown in the figure, the equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum provided in this embodiment are as follows:

[0042] Step 1: When starting the synthesis of aluminum nitride powder, first, manually sorted waste aluminum wires are fed into the resistance melting furnace for smelting. After the waste aluminum wires are smelted, the temperature inside the resistance melting furnace is maintained at 700-750 degrees Celsius. Then, the drive motor is started to make the first pulley rotate. Since the second pulley is connected to the first pulley through the belt body, the rotation of the first pulley can also replace the rotation of the second pulley. When the second pulley rotates, the impurity adsorption roller can remove heavy metals such as Si, Fe, and Ni from the interior. Impurities are separated, and the purified high-temperature aluminum liquid is lifted to the interior of the upper voltage stabilizer. Then, the high-temperature nitrogen jet device installed on the voltage stabilizer rapidly atomizes the high-temperature aluminum liquid into tiny spherical aluminum liquid and sends it into the interior of the synthesis reactor. Under the further crushing action of the supersonic high-temperature nitrogen nozzle, the aluminum spheres with nitrided surfaces are further crushed and nitrided, and can spiral upward at a speed of 0.5 m / s and be sprayed into the interior of the cooling collector. Since this reaction is an exothermic reaction, in order to ensure the complete reaction and control the crystal form, nitrogen must be in excess and the pressure and temperature must be stable.

[0043] Step 2: Through the pneumatic conveying device, air cooler, separator, and classifier, excess nitrogen gas is separated by precipitation in the cooling collector. Nitrogen gas with a temperature of around 200 degrees Celsius enters the air cooler from the upper outlet pipe of the cooling collector and is cooled to below 60 degrees Celsius. It then enters the screw compressor to increase the nitrogen pressure to 8 kg / cm and enters the jacket heat exchanger of the synthesis reactor for recycling. At the same time, the cooled aluminum nitride powder can be sent into the interior of the separator through the pneumatic conveying device, and then from the separator into the interior of the classifier. The classifier can separate aluminum nitride powder into three grades, classifying aluminum nitride powder of different purities, which facilitates its inspection, packaging, and sale, and avoids affecting the sales price due to different grades of aluminum nitride powder produced.

[0044] Step 3: Through the setting of the feed pipe and connecting pipe, excess nitrogen gas is separated by the cooling collector. The nitrogen gas first enters the interior of the air cooler through the connecting pipe. This method can facilitate the transportation of excess nitrogen gas. Then, the nitrogen gas at a temperature of about 200 degrees Celsius is cooled by the air cooler, which can accelerate the cooling rate of high temperature gas and avoid uncontrollable dangerous factors caused by high temperature gas.

[0045] Step 4: Through the setup of the first, second, and third filters, aluminum nitride powder first enters the first filter through the sorting machine. Then, a portion of the aluminum nitride powder falls into the first separator, and the remaining aluminum nitride powder enters the second filter. After screening, the remaining aluminum nitride powder enters the second and third separators respectively. Through multiple screenings by the first, second, and third filters, the aluminum nitride powder is able to enter the corresponding separator.

Claims

1. A device and method for directly synthesizing aluminum nitride powder from recycled aluminum, comprising a main body (1) and a connecting plate (2), characterized in that: The main body (1) of the equipment is provided with an aluminum nitride powder synthesis structure (3), which includes an aluminum resistance melting furnace (4) installed on one side of the main body (1). The aluminum resistance melting furnace (4) is provided with a reagent inlet (5). A centrifuge structure (6) is provided below the connecting plate (2). The centrifuge structure (6) includes a drive motor (7) fixedly installed on one side of the main body (1). A first pulley (8) is fixedly installed at the output end of the drive motor (7). An impurity adsorption roller (9) is installed inside the aluminum resistance melting furnace (4). A second pulley (10) is fixedly installed at one end of the impurity adsorption roller (9). The first pulley (8) and the second pulley (10) are connected by a belt body (11).

2. The equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum according to claim 1, characterized in that: A conveying structure (12) is fixedly installed on the connecting plate (2). A connecting assembly (13) connected to the impurity adsorption roller (9) is fixedly installed at the bottom of the conveying structure (12). A voltage regulator (14) connected to the conveying structure (12) is installed on the top of the main body of the equipment (1). A high-temperature nitrogen jet device (15) is provided on the voltage regulator (14). A synthesis reactor (16) connected to the high-temperature nitrogen jet device (15) is fixedly installed inside the main body of the equipment (1). A cooling collector (17) connected to the main body of the equipment (1) is fixedly installed on one side of the voltage regulator (14).

3. The equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum according to claim 2, characterized in that: A pneumatic conveying device (18) is provided on one side of the cooling collector (17), and the synthesis reactor (16) is connected to the pneumatic conveying device (18) through an air cooler (19).

4. The equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum according to claim 2, characterized in that: The voltage regulator (14) is equipped with a sorting machine (20) connected to the main body of the equipment (1), and the bottom of the sorting machine (20) is provided with multiple sorters (21).

5. The equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum according to claim 3, characterized in that: The top of the synthesis reactor (16) is fixedly equipped with a feed pipe (22), and a connecting pipe (23) is installed between the air cooler (19) and the feed pipe (22).

6. The equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum according to claim 4, characterized in that: A first filter (24) is fixedly installed at the bottom of the sorting machine (20), a second filter (25) is fixedly installed on one side of the first filter (24), and a third filter (26) connected to the sorting machine (21) is fixedly installed at one end of the second filter (25).

7. The equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum according to claim 1, characterized in that: The resistance melting aluminum furnace (4) is provided with a fixing ring (27), and a sealing cover (28) is installed on the top of the fixing ring (27). Multiple screws (29) connected to the fixing ring (27) are installed on the sealing cover (28).

8. The equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum according to claim 2, characterized in that: A first flange (30) is fixedly installed at one end of the connecting assembly (13), and a conveying pipe (31) is provided on one side of the connecting assembly (13). A second flange (32) connected to the first flange (30) is fixedly installed at one end of the conveying pipe (31).

9. The equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum according to claim 1, characterized in that: A connecting rod (33) is fixedly installed at one end of the resistance melting aluminum furnace (4), and a temperature display (34) is provided on the connecting rod (33).

10. The equipment and method for directly synthesizing aluminum nitride powder from recycled aluminum according to claim 1, comprising the following steps: S1. When the synthesis of aluminum nitride powder begins, the manually sorted waste aluminum wires are first put into the resistance melting furnace (4) for melting. After the waste aluminum wires are melted, the temperature inside the resistance melting furnace (4) is kept at 700-750 degrees. Then the drive motor (7) is started to drive the first pulley (8) to start rotating. Since the second pulley (10) is connected to the first pulley (8) through the belt body (11), the first pulley (8) can also replace the second pulley (10) to start rotating. When the second pulley (10) rotates, the impurity adsorption roller (9) can remove the heavy metal S inside. Impurities such as Fe and Ni are separated, and the purified high-temperature aluminum liquid is lifted to the inside of the upper voltage stabilizer (14). Then, the high-temperature nitrogen jet device (15) installed on the voltage stabilizer (14) rapidly atomizes the high-temperature aluminum liquid into tiny spherical aluminum liquid and sends it into the inside of the synthesis reactor (16). Under the further crushing action of the supersonic high-temperature nitrogen nozzle, the aluminum spheres with nitrided surfaces are further crushed and nitrided, and can spiral upward at a speed of 0.5 m / s and spray into the inside of the cooling collector (17). Since this reaction is an exothermic reaction, in order to ensure the complete reaction and control the crystal form, nitrogen should be in excess and the pressure and temperature should be stable. S2. Through the pneumatic conveying device (18), air cooler (19), separator (20) and separator (21), excess nitrogen is separated by precipitation in the cooling collector (17). Nitrogen at a temperature of about 0 degrees in the separator (20) enters the air cooler (19) from the upper outlet pipe of the cooling collector (17) and is cooled to below 60 degrees. It then enters the compressor to increase the nitrogen pressure to 8 kg / cm and enters the jacket heat exchanger of the synthesis reactor (16) for recycling. At the same time, the cooled aluminum nitride powder can be sent into the interior of the separator (20) through the pneumatic conveying device (18), and then from the separator (20) into the interior of the separator (21). The separator (21) can sort into three grades. Aluminum nitride powder of different purity levels can be classified, which facilitates its inspection, packaging and sale, and avoids affecting the sales price due to different grades of aluminum nitride powder produced. S3. Through the setting of feed pipe (22) and connecting pipe (23), excess nitrogen gas is separated by precipitation in cooling collector (17). Nitrogen gas first enters the interior of air cooler (19) through connecting pipe (23). This method can facilitate the transportation of excess nitrogen gas. Then, the nitrogen gas at a temperature of about 200 degrees Celsius is cooled by air cooler (19). This can accelerate the cooling speed of high temperature gas and avoid uncontrollable dangerous factors caused by high temperature gas. S4. Through the setting of the first filter (24), the second filter (25) and the third filter (26), aluminum nitride powder first enters the first filter (24) through the sorter (20), then a portion of the aluminum nitride powder falls into the first sorter (21), and then the remaining aluminum nitride powder enters the interior of the second filter (25). After screening, the remaining aluminum nitride powder enters the second and third sorters (21) respectively. After multiple screenings by the first filter (24), the second filter (25) and the third filter (26), the aluminum nitride powder can enter the corresponding sorter (21).

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