A high-efficiency preparation method and device for spherical titanium powder

Abstract

The invention discloses a high-efficiency preparation method and device for spherical titanium powder. The device comprises a raw material bin, a transition bin, a granulation furnace and a collection bin arranged in sequence from top to bottom. The granulation furnace is divided into an atomization zone, a dehydrogenation zone and a cooling zone from top to bottom, and a centrifugal atomization device is provided in the granulation furnace. Utilizing the characteristics of titanium hydride, which has a low melting point and is easy to melt, and the high sphericity of powder prepared by an atomization method, it is proposed to prepare spherical titanium hydride by an atomization method and then combine it with a titanium hydride dehydrogenation method to prepare metallic pure titanium powder particles with high sphericity, thereby achieving technological progress and low-cost manufacturing of high-quality spherical titanium powder. Titanium hydride is directly melted, atomized and granulated, and dehydrogenated in one step, thereby achieving process goals such as a short process, high efficiency, low cost and no pollution, and significantly reducing the preparation cost of titanium and titanium alloys.

Description

Technical Field

[0001] The invention belongs to the technical field of metal powder preparation, relates to chemical metallurgy technology, and particularly relates to a high-efficiency preparation method and device for spherical titanium powder. Background Art

[0002] Titanium and its alloys are important metals developed in the mid-20th century. They have garnered widespread attention due to their excellent properties, including low density, high specific strength, excellent corrosion resistance, high heat resistance, non-magnetic properties, and excellent weldability. In recent years, with the widespread application of titanium alloys, the production of complex components with complex shapes and structures has increased significantly, leading to a significant increase in demand for 3D printing of titanium and titanium alloys. High-performance metal powders with high sphericity, excellent flowability, and low impurity content are key raw materials for technologies such as powder metallurgy, additive manufacturing, injection molding, and atmospheric plasma spraying. 3D printing places particularly stringent requirements on the flowability of printing powders. Since the flow characteristics of a powder are significantly correlated with its sphericity, 3D printing places extremely stringent demands on the sphericity and particle size distribution of the powder material. The main methods for preparing titanium and titanium alloy powders include atomization, reduction, electrolysis, hydrogenation dehydrogenation (HDH), and rotating electrode atomization (PREP). Commonly used methods for producing spherical titanium and titanium alloy powders include hydrogenation dehydrogenation, atomization, and spheroidization.

[0003] 1. Titanium hydride dehydrogenation method

[0004] At present, the preparation of spherical titanium powder by dehydrogenation of titanium hydride mainly includes two main processes: dehydrogenation of titanium hydride and spheroidization. Titanium powder can be obtained by dehydrogenation of titanium hydride powder under high temperature and vacuum conditions. The reaction formula is:

[0005] TiH2(s)=Ti(s)+H2(g)

[0006] The decomposition and dehydrogenation reaction of titanium hydride is an endothermic process that requires a high temperature and vacuum. The decomposition of titanium hydride is a multi-stage reaction that cannot be carried out completely. The decomposition temperature of titanium hydride powder is generally above 550°C. Figure 1 The conventional dehydrogenation method for titanium hydride powder is a loose powder method. High-temperature sintering significantly increases the particle size, so the titanium powder needs to be further mechanically crushed after dehydrogenation. However, the particles after mechanical crushing are not spherical, but irregular in shape and have poor fluidity. Therefore, a spheroidization process is required to improve the sphericity and fluidity of the titanium powder.

[0007] 2. Atomization method

[0008] The atomization methods currently used to produce spherical titanium powder mainly include gas atomization, centrifugal atomization and ultrasonic atomization.

[0009] Gas atomization is a technology that uses a high-speed airflow of an atomizing medium to break up the molten titanium metal flow, spheroidize the titanium powder, and rapidly condense it. The most widely used methods are vacuum induction melting gas atomization and electrode induction melting gas atomization. The vacuum induction melting gas atomization method places titanium sponge or titanium rods in a crucible and uses vacuum induction to melt them. The kinetic energy of the high-speed atomizing medium (argon) is then used to transform the liquid into fine droplets, which solidify during flight within the atomization tower, forming spherical titanium powder with high sphericity and low oxygen content. The electrode induction melting gas atomization method eliminates the crucible and draft tube and directly melts the rotating titanium metal through electromagnetic heating. The molten metal falls vertically and solidifies, improving the pollution problem. This method reduces impurity contamination of the titanium powder and consumes relatively little energy. However, the state of the molten metal is unstable during the spheroidization process, which can easily lead to composition segregation.

[0010] Centrifugal atomization is a technology that uses centrifugal force to break up molten metal, throwing the resulting droplets into the air and rapidly cooling them to produce spherical metal particles. Centrifugal atomization is mainly divided into plasma atomization (PA) and plasma rotating electrode method (PREP). PA uses titanium as the raw material and a plasma gun as the heating source. The raw material is instantly melted by the plasma and simultaneously heated by the high-temperature gas.

[0011] Atomized into tiny droplets, which solidify into spherical metal particles as they fall. This process has high atomization efficiency, uses thermal plasma, has a long cooling time, and produces powders with good sphericity and high purity. However, due to the inability to precisely coordinate the rotating electrode with the atomization process parameters, the yield of fine powder is low. PREP uses a plasma arc to melt the metal, ejecting metal droplets under the action of centrifugal force, and solidifying them in a cooling medium. Because the plasma rotating electrode method does not use a crucible to melt the metal, the powder produced is of higher purity. In addition, this technology does not use inert gas to atomize the metal liquid flow, and there is almost no obvious composition segregation between the powder particles.

[0012] Ultrasonic atomization uses ultrasonic vibrations to disrupt the titanium metal stream, rapidly cooling the molten droplets and producing a powder. This method significantly improves powder production efficiency, but requires a large amount of inert gas and is costly.

[0013] 3. Spheroidization method

[0014] The spheroidization method utilizes a high-energy-density heat source to rapidly melt or vaporize irregular powders. This is then rapidly cooled, solidified, and deposited under a significant temperature gradient to yield a spherical powder. Powders produced by this method exhibit relatively high sphericity, a smooth surface, good fluidity, and high purity. Even powders with subpar morphology and quality can be transformed into high-quality spherical powders through spheroidization. The main spheroidization methods for producing spherical titanium metal powders include plasma spheroidization (PS) and laser spheroidization (LS).

[0015] Plasma spheroidization, a technique that produces molten metal powder under high-frequency plasma heating, followed by spheroidization and rapid solidification, is currently the most promising spheroidization method. High-frequency induction thermal plasma offers advantages such as high temperatures (3,000–10,000 K) and rapid cooling rates, but the product also has a high oxygen content.

[0016] Laser spheroidization is a phenomenon in selective laser melting. A molten pool is surrounded by metal powder and gas. When a high-energy laser beam is applied to the metal powder, the force exerted by the powder on the molten pool is far less than the surface tension of the molten pool. To minimize surface free energy, the metal powder spheroidizes under the influence of gravity and surface tension. While laser spheroidization has the advantage of being a high-energy beam that doesn't introduce foreign matter, numerous factors have limited its development.

[0017] As can be seen above, powders produced by the titanium hydride dehydrogenation method lack spherical characteristics and require further spheroidization. The gas atomization method uses titanium metal as the raw material, followed by remelting and atomization. The centrifugal atomization method uses metal rods as the raw material, followed by remelting and spheroidization. Plasma and laser spheroidization methods use titanium metal powder as the raw material, melting and spheroidizing the powder. In summary, all of the above methods for spheroidizing titanium and titanium alloy powders use titanium metal as the raw material. They differ only in the following pathways: powder plasma and laser spheroidization have the shortest pathways, starting with hydrogenated dehydrogenated powders; while the atomization method has a longer pathway, using titanium and titanium alloy solutions or densified rods as the raw material. All existing spherical powder production methods rely on melting titanium and titanium alloys and then spheroidizing them. The melting point of titanium metal is 1668°C. Therefore, high energy consumption is a major contributor to the high cost of spherical titanium powders.

[0018] Through the analysis of the above-mentioned spherical titanium powder preparation methods, it can be seen that the preparation of spherical titanium powder by the hydrogenation and dehydrogenation method requires subsequent plasma or laser re-spheroidization due to its irregular shape, and other impurity elements are easily added during the titanium hydride crushing process. Both the atomization method and the spheroidization method use titanium metal or hydrogenation and dehydrogenation powder as the base material for re-liquefaction and atomization. These methods have long processes and require preparation above the melting point of titanium metal, resulting in multiple steps, high energy consumption, and high cost.

[0019] Long process and multiple steps: The mainstream methods for producing spherical titanium powders are: 1. Using hydrogenated dehydrogenated powder as the raw material, followed by plasma spheroidization; 2. Centrifugal atomization of titanium and titanium alloy rods. Because centrifugal equipment is demanding, the process generally involves hydrogenated dehydrogenated powder, pressing, sintering, arc / electron beam melting, press working, machining, high-density, high-precision rod production, centrifugal atomization, and finally spherical powder formation.

[0020] High energy consumption: Regardless of the type of titanium and titanium alloy spheroidized powder, the metal titanium is spheroidized by bulk melting or powder melting, and the temperature is required to be above 1668℃.

[0021] Low efficiency: Because the above powder preparation process is long, has many steps, and is discontinuous, the powder production efficiency is low.

[0022] High cost: The long process, multiple steps and high temperature of titanium and titanium alloy powders result in high energy consumption, depreciation and labor costs.

[0023] The titanium hydride dehydrogenation method is currently a commonly used preparation method for titanium powder. It has the advantages of low cost and simple principle. However, the titanium powder produced has disadvantages such as irregular shape, poor fluidity, and high impurity content, which seriously limit the expansion of its application range. Titanium powder prepared by the atomization method has high sphericity, good fluidity, low oxygen content, small average particle size and narrow particle size distribution, and has become the mainstream technology for the preparation of high-quality spherical titanium powder. However, the preparation of titanium and titanium alloy powders by the atomization method has a long process and high cost, which significantly increases the cost of titanium products. This not only limits the development of 3D printing technology, but also limits the application of low-cost powder metallurgy methods in the field of titanium alloy material preparation.

[0024] In order to reduce the manufacturing cost of spherical titanium powder preparation and promote the rapid development of 3D printing and powder metallurgy technology in the field of titanium and titanium alloys, it is urgent and important to develop low-cost spherical titanium powder. Summary of the Invention

[0025] In view of the problems existing in the prior art, the present invention aims to provide a method and device for efficiently preparing spherical titanium powder, thereby significantly reducing the preparation cost of spherical titanium powder.

[0026] The present invention is achieved through the following technical solutions:

[0027] A high-efficiency preparation device for spherical titanium powder comprises a raw material bin, a transition bin, a granulation furnace and a collection bin arranged in sequence from top to bottom;

[0028] The raw material bin and the transition bin are connected, as are the transition bin and the granulation furnace, respectively, via switch valves. The transition bin and the granulation furnace are both connected to a vacuum pump. The granulation furnace is divided from top to bottom into an atomization zone, a dehydrogenation zone, and a cooling zone. Heating devices are respectively provided in the atomization zone and the dehydrogenation zone, and the temperatures of different zones are raised to the production temperature by the heating devices. The heating devices in the atomization zone and the dehydrogenation zone are respectively provided with heating switches for independent control. The cooling zone is connected to the collection bin below. A centrifugal atomization device is provided in the granulation furnace, and is located in the atomization zone. The centrifugal atomization device is used to separate molten droplets from raw material blocks and form droplets with very small diameters.

[0029] Furthermore, the centrifugal atomization device includes a rotating motor installed above the granulation furnace, the rotating motor shaft is connected to a rotating shaft extending into the granulation furnace, the end of the rotating shaft is connected to a porous atomization hood, and the porous atomization hood is suspended in the granulation furnace.

[0030] Furthermore, the porous atomizing hood is a cylindrical structure with an open top and a closed bottom, which is formed by rolling a porous plate. The rotating shaft extends into the cylindrical structure and is fixed to the bottom of the cylinder.

[0031] Furthermore, the transition bin outlet is connected to a feed pipe, which extends above the porous atomizing hood.

[0032] Furthermore, the heating devices of the atomization zone and the dehydrogenation zone are respectively provided with heating switches for independent control.

[0033] Furthermore, a feeding unit consisting of multiple groups of raw material bins and transition bins is arranged above the granulating furnace, and each feeding unit is connected to the granulating furnace respectively.

[0034] Furthermore, the bottoms of the raw material bin, transition bin, granulation furnace and collection bin are all inverted conical structures, and the outlets of each structure are arranged at the tip of the bottom of the conical structure.

[0035] The high-efficiency preparation method of spherical titanium powder comprises the following steps:

[0036] 1). Titanium hydride feed

[0037] First, titanium hydride blocks are placed in the raw material bin, and titanium hydride is poured from the raw material bin into the transition bin. Then, the switch valve between the transition bin and the raw material bin is closed, and then the vacuum pump is turned on to evacuate the vacuum. When the transition bin and the granulating furnace are at the same vacuum degree, the switch valve between the lower part of the transition bin and the granulating furnace is opened, and the material enters the porous atomizing hood along the discharge pipe.

[0038] 2). Titanium hydride melting and atomization

[0039] The heating switches of the atomization zone and the dehydrogenation zone are turned on respectively. When the temperatures of the atomization zone and the dehydrogenation zone reach 400-450°C and 600-1000°C respectively, the titanium hydride begins to melt above 400°C. At this time, the rotary motor switch is turned on. The rotary motor drives the porous atomization cover to rotate. Under the action of centrifugal force, the molten titanium hydride is thrown out from the holes of the porous atomization cover to form titanium hydride droplets with very small diameters. Under the action of surface tension, the titanium hydride droplets complete the spheroidization process. The titanium hydride droplets continue to settle downward under the action of gravity.

[0040] 3). Titanium hydride dehydrogenation

[0041] The titanium hydride droplets after atomization and spheroidization settle into the dehydrogenation zone, and the temperature of the dehydrogenation zone rises to the dehydrogenation temperature. In the dehydrogenation zone, the spherical titanium hydride droplets are transformed into spherical titanium powder;

[0042] 4). Cold zone and collection

[0043] The spherical titanium powder is cooled into powder particles in the low-temperature cooling zone and collected in the collection bin.

[0044] The present invention has the following beneficial effects:

[0045] 1. The present invention abandons the titanium hydride crushing and powdering technology and process flow established in the traditional titanium and titanium alloy preparation process based on the brittle and easily broken characteristics of titanium hydride. Taking advantage of the low melting point and easy melting of titanium hydride and the high sphericity of powder prepared by atomization, a process method is proposed to prepare spherical titanium hydride by atomization and then combine it with titanium hydride dehydrogenation to prepare high-sphericity metallic pure titanium powder particles, achieving technological progress and low-cost manufacturing of high-quality spherical titanium powder. It has created the foundation for powder preparation by direct granulation and then dehydrogenation based on the low melting point of titanium hydride;

[0046] 2. Make full use of the different melting temperature and dehydrogenation temperature of titanium hydride to achieve seamless connection between melting and dehydrogenation processes in the same granulation furnace. The melting temperature is below 450°C, the diffusion of impurity elements in the crucible is small, and there is no other contact process; the invasion of intermediate processes and their impurity elements is avoided, and the pollution of impurity elements is small.

[0047] 3. Utilize the principle of small droplets, large specific surface area, and easy diffusion of dehydrogenation on curved surfaces to enhance dehydrogenation efficiency; directly melt titanium hydride, atomize and granulate, and dehydrogenate in one step; low equipment requirements and low depreciation, no need for high-temperature equipment above 1600°C, and no need for high-end heat source configurations such as electron beams and lasers;

[0048] 4. By leveraging the low melting point of titanium hydride (400-450°C) and the dehydrogenation temperature (600-1200°C), the present invention reduces the melting point of titanium and titanium alloys from above 1668°C to within 800-1200°C, significantly lowering temperatures above 1668°C. This reduces energy consumption and significantly reduces the temperature. Using titanium hydride as the raw material for direct dehydrogenation and spheroidization, this process achieves a short, efficient, low-cost, and pollution-free process. This allows for continuous and large-scale production, significantly reducing the cost of producing titanium and titanium alloys. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a production flow chart of the traditional titanium hydride powder dehydrogenation method;

[0050] Figure 2 This is a schematic structural diagram of a high-efficiency preparation device for spherical titanium powder according to the present invention;

[0051] In the figure: 1-raw material warehouse, 2-transition warehouse, 3-granulation furnace, 31-atomization zone, 32-dehydrogenation zone, 33-cooling zone, 4-collection chamber, 5-switch valve, 6-centrifugal atomization device, 7-rotating motor, 8-porous atomization hood, 9-vacuum pump, 10-discharging pipe, 11-rotating shaft. DETAILED DESCRIPTION

[0052] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain the present invention rather than to limit it.

[0053] like Figure 2 As shown, the high-efficiency preparation device for spherical titanium powder of the present invention is mainly divided into a four-layer structure, which is, from top to bottom, a raw material bin 1, a transition bin 2, a granulation furnace 3 and a collection bin 4.

[0054] The upper layer is the raw material bin 1, which is connected to the transition bin 2 and the granulation furnace 3 by on / off valves 5. The bottom layer is the powder collection bin 4. Both the transition bin 2 and the granulation furnace 3 are connected to a vacuum pump 9, which evacuates the system during operation. To improve production efficiency, a feeding unit consisting of multiple raw material bins 1 and transition bins 2 is connected to the granulation furnace 3. By having multiple feeding units operate simultaneously, feeding efficiency is effectively improved.

[0055] The granulation furnace 3 is divided into three zones: from top to bottom, an atomization zone 31, a dehydrogenation zone 32, and a cooling zone 33. Each zone is equipped with a heating device to raise the temperature of each zone to production temperatures. Each zone's heating device is independently controlled with a heating switch. The temperature of the atomization zone 31 is maintained at ≤450°C, 50°C above the melting point of titanium hydride. The temperature of the dehydrogenation zone 32 is maintained at ≤1000°C, and the temperature of the cooling zone 33 is maintained at ≤60°C. Below the cooling zone is a powder collection bin 4. A centrifugal atomizer 6 is provided within the granulating furnace 3 and is located within the atomizing zone 31. The centrifugal atomizer 6 primarily comprises a rotary motor 7, a rotating shaft 11, and a porous atomizer hood 8. The rotary motor 7 is mounted above the granulating furnace 3. The rotary motor 7's rotating shaft is connected to the rotating shaft 11, which extends into the granulating furnace 3. The distal end of the rotating shaft 11 is connected to the porous atomizer hood 8, which is suspended within the granulating furnace 3. The porous atomizer hood 8 is a cylindrical structure formed by rolling a porous sheet material. The cylindrical structure is open at the top and closed at the bottom. The rotating shaft 11 extends into the cylindrical structure and is secured to the bottom of the cylinder. A feed pipe 10 is connected to the outlet of the transition bin 2. The feed pipe 10 extends above the porous atomizer hood 8. The rotary motor 7 drives the porous atomizer hood 8 to rotate via the rotating shaft 11, separating the molten droplets from the raw material blocks and forming droplets of very small diameter.

[0056] The bottoms of the raw material bin 1, transition bin 2, granulation furnace 3 and collection bin 4 are all inverted conical structures, and the outlets of each structure are arranged at the tip of the bottom of the conical structure to facilitate the collection and outflow of materials by gravity.

[0057] Based on the above device, the process flow for the high-efficiency preparation of spherical titanium powder of the present invention is as follows:

[0058] 1. Titanium hydride feed

[0059] First, place titanium hydride blocks in raw material bin 1. Then, pour a predetermined amount of titanium hydride from raw material bin 1 into transition bin 2. Close the valve between the transition bin and raw material bins, and then activate vacuum pump 9 to evacuate the chamber. Once both transition bin 2 and granulating furnace 3 are at the same vacuum level, open valve 5 between the lower portion of transition bin 2 and granulating furnace 3, and the material flows through discharge pipe 10 into porous atomizing hood 8.

[0060] 2. Titanium hydride melting and atomization

[0061] Turn on the heating switches for the atomization zone 31 and dehydrogenation zone 32. When the temperatures in the atomization zone and dehydrogenation zone reach 400-450°C and 600-1000°C, respectively, the titanium hydride begins to melt above 400°C. At this point, turn on the rotary motor 7. This rotates the porous atomization hood 8. Centrifugal force ejects the molten titanium hydride from the pores of the porous atomization hood 8, forming tiny titanium hydride droplets. Surface tension causes the titanium hydride droplets to spheroidize. Because the atomization zone temperature is low, dehydrogenation conditions have not yet been reached. The titanium hydride droplets continue to settle downward under the influence of gravity.

[0062] 3. Titanium hydride dehydrogenation

[0063] The atomized and spheroidized titanium hydride droplets settle into dehydrogenation zone 32. Because the temperature in dehydrogenation zone 32 rises to the dehydrogenation temperature, and the spherical titanium hydride droplets are small and have a large specific surface area, hydrogen atoms have a short diffusion path within the droplets and diffuse quickly outward, significantly improving dehydrogenation efficiency. This achieves the transformation from spherical titanium hydride droplets to spherical titanium powder.

[0064] 4. Cold zone and collection

[0065] After dehydrogenation, spherical titanium powder is formed, which is cooled into powder particles in the low-temperature cooling zone 33 and enters the cooling and collecting bin 4 for collection.

[0066] The present invention's highly efficient method and apparatus for producing spherical titanium powder boasts a short process flow and low costs. Titanium hydride is produced by hydrogenating titanium sponge, shortening the raw material flow and reducing costs. Titanium hydride is melted and then spheroidized, shortening the production process. Furthermore, the method and apparatus feature low energy consumption and a low forming temperature. Furthermore, the equipment, a 1200°C medium-temperature furnace, is low in cost and depreciation. Furthermore, the method and apparatus require minimal personnel skills, resulting in low personnel costs. This significantly reduces the production cost of spherical titanium powder, promoting the application of 3D printing and powder metallurgy technologies in the titanium and titanium alloy fields.

Claims

1. A high-efficiency preparation method for spherical titanium powder, characterized by: The high-efficiency preparation device for spherical titanium powder comprises a raw material bin (1), a transition bin (2), a granulation furnace (3) and a collection bin (4) which are arranged in order from top to bottom; The raw material bin (1) and the transition bin (2), and the transition bin (2) and the granulation furnace (3) are connected via switch valves (5), and the transition bin (2) and the granulation furnace (3) are both connected to a vacuum pump (9); the granulation furnace (3) is divided into an atomization zone (31), a dehydrogenation zone (32), and a cooling zone (33) from top to bottom, and heating devices are respectively provided in the atomization zone (31) and the dehydrogenation zone (32), and the temperature of different sections is raised to the production temperature by the heating devices. The heating devices of the atomization zone (31) and the dehydrogenation zone (32) are respectively provided with heating switches, which are independently controlled, and the cooling zone (33) is connected to the collection bin (4) below; a centrifugal atomization device (6) is provided in the granulation furnace (3), and the centrifugal atomization device (6) is located in the atomization zone (31). The centrifugal atomization device (6) separates molten droplets from raw material blocks and forms droplets with very small diameters; The high-efficiency preparation method of spherical titanium powder based on the device comprises the following steps: 1). Titanium hydride feed First, titanium hydride blocks are placed in the raw material bin (1), and titanium hydride is poured from the raw material bin (1) into the transition bin (2). Then, the switch valve between the transition bin and the raw material bin is closed, and then the vacuum pump (9) is turned on to evacuate the vacuum. When the transition bin (2) and the granulating furnace (3) are both at the same vacuum degree, the switch valve (5) between the lower part of the transition bin (2) and the granulating furnace (3) is opened, and the material enters the porous atomizing hood (8) along the discharge pipe (10); 2). Titanium hydride melting and atomization The heating switches of the atomizing zone (31) and the dehydrogenation zone (32) are turned on respectively. When the temperatures of the atomizing zone and the dehydrogenation zone reach 400-450°C and 600-1000°C respectively, the titanium hydride begins to melt above 400°C. At this time, the rotary motor (7) is turned on. The rotary motor (7) drives the porous atomizing cover (8) to rotate. Under the action of centrifugal force, the molten titanium hydride is thrown out from the holes of the porous atomizing cover (8) to form titanium hydride droplets with very small diameters. Under the action of surface tension, the titanium hydride droplets complete the spheroidization process. The titanium hydride droplets continue to settle downward under the action of gravity. 3). Titanium hydride dehydrogenation The atomized and spheroidized titanium hydride droplets settle into the dehydrogenation zone (32), the temperature of the dehydrogenation zone (32) is increased to the dehydrogenation temperature, and the spherical titanium hydride droplets are transformed into spherical titanium powder in the dehydrogenation zone (32); 4). Cold zone and collection The spherical titanium powder is cooled into powder particles in the low-temperature cooling zone (33) and enters the collecting bin (4) for collection.

2. The high-efficiency preparation method of spherical titanium powder according to claim 1, characterized in that: The centrifugal atomization device (6) includes a rotating motor (7) installed above the granulation furnace (3), the rotating shaft of the rotating motor (7) is connected to a rotating shaft (11) extending into the granulation furnace (3), the end of the rotating shaft (11) is connected to a porous atomization cover (8), and the porous atomization cover (8) is suspended in the granulation furnace (3).

3. The high-efficiency preparation method of spherical titanium powder according to claim 2, characterized in that: The porous atomizing hood (8) is a cylindrical structure formed by rolling a porous plate with an open top and a closed bottom. The rotating shaft (11) extends into the cylindrical structure and is fixed to the bottom of the cylinder.

4. The high-efficiency preparation method of spherical titanium powder according to claim 3, characterized in that: The outlet of the transition bin (2) is connected to a discharge pipe (10), and the discharge pipe (10) extends above the porous atomizing hood (8).

5. The high-efficiency preparation method of spherical titanium powder according to any one of claims 1 to 4, characterized in that: The heating devices of the atomization zone (31) and the dehydrogenation zone (32) are respectively provided with heating switches and are independently controlled.

6. The high-efficiency preparation method of spherical titanium powder according to claim 5, characterized in that: A feeding unit consisting of multiple groups of raw material bins (1) and transition bins (2) is arranged above the granulating furnace (3), and each feeding unit is connected to the granulating furnace (3).

7. The high-efficiency preparation method of spherical titanium powder according to claim 5, characterized in that: The bottoms of the raw material bin (1), transition bin (2), granulation furnace (3) and collection bin (4) are all inverted conical structures, and the outlets of each structure are arranged at the tip of the bottom of the conical structure.

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