Method for preparing low-oxygen titanium powder through hydrogenation dehydrogenation method and titanium powder
By introducing a hydrogen absorption catalyst and a vacuum crushing screening machine in the hydrogenation dehydrogenation method, the problems of long dehydrogenation process time and easy oxygen increase in titanium powder in the conventional hydrogenation dehydrogenation method are solved, and the efficient preparation of low-oxygen titanium powder is achieved, which improves the production efficiency and material mechanical properties.
Patent Information
- Application Number
- CN202411701285.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-03-14
AI Technical Summary
During the preparation of titanium powder by conventional hydrogenation dehydrogenation method, the dehydrogenation process time is long and the powder is prone to agglomeration, resulting in low production efficiency and titanium powder is prone to oxygenation, limiting the mechanical properties and application of the titanium material it has prepared.
Using the hydrogenation dehydrogenation method, titanium hydride powder is obtained by hydrogenating titanium sponge in a hydrogenation furnace, and dehydrogenation is performed using a hydrogen absorption catalyst (such as calcium particles) in the dehydrogenation furnace to form an internal and external pressure difference to accelerate the decomposition and diffusion of H atoms. Finally, the sieving and grading is performed through a vacuum crushing screening machine to obtain low-oxygen titanium powder.
It significantly shortens the dehydrogenation process time, improves production efficiency, reduces the oxygen content of titanium powder, avoids clumping, simplifies process operations, is highly applicable, and meets industrial production requirements.
Smart Images
Figure CN119609145A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of titanium powder preparation, and in particular to a method for preparing low-oxygen titanium powder by hydrogenation-dehydrogenation method and titanium powder. Background Art
[0002] Titanium is widely used in biomedicine, aerospace, hydrogen storage and other fields due to its excellent specific strength, corrosion resistance and low density. At present, the preparation methods of titanium powder include hydrogenation and dehydrogenation, gas atomization, mechanical pulverization, rotating electrode method, etc. Among them, hydrogenation and dehydrogenation has low production cost, simple principle and easy operation, high raw material utilization rate, and can prepare fine-particle titanium powder according to demand. It is currently the commonly used method for preparing titanium powder.
[0003] The titanium powder prepared by the conventional hydrogenation-dehydrogenation method has an irregular shape and a large specific surface area. The dehydrogenation process takes a long time and the powder is easy to agglomerate, so it needs to be crushed and refined again after dehydrogenation. The surface activity of the powder after dehydrogenation is extremely high, and it is very easy to react with oxygen, resulting in serious oxygenation of the titanium powder. The long-term high-temperature dehydrogenation and subsequent crushing and grading process significantly increase the oxygen content of the prepared titanium powder. The high-oxygen content of the titanium powder seriously limits the mechanical properties and application of the titanium material prepared therefrom. Summary of the invention
[0004] The present application provides a method for preparing low-oxygen titanium powder by hydrogenation-dehydrogenation method and titanium powder, which can solve the problems of low titanium powder production efficiency and serious oxygen addition caused by inefficient dehydrogenation process and difficulty in breaking powder agglomerates.
[0005] In order to achieve the above objectives, this application adopts the following technical solutions:
[0006] In a first aspect of the present application, a method for preparing low-oxygen titanium powder by hydrogenation-dehydrogenation is provided, the method comprising:
[0007] placing the titanium sponge into a hydrogenation furnace, and performing a hydrogenation treatment on the titanium sponge under a hydrogen atmosphere to obtain a titanium hydride material;
[0008] Using a vacuum crushing and screening machine to crush the titanium hydride material to obtain titanium hydride powder;
[0009] placing the titanium hydride powder and the hydrogen absorption catalyst into a dehydrogenation furnace for dehydrogenation treatment to obtain pure titanium powder;
[0010] The pure titanium powder is placed in a vacuum crushing and screening machine for screening and grading to obtain low-oxygen titanium powder.
[0011] In one embodiment, the purity of the titanium sponge is 99.6-99.99%, and the particle size of the titanium sponge is 1-10 mm.
[0012] In one embodiment, the purity of the hydrogen is 99.9-99.99%.
[0013] In one embodiment, the temperature of the hydrogenation treatment is 400-600° C., and the holding time of the hydrogenation treatment is 3-9 hours.
[0014] In one embodiment, the ball-to-material ratio of the crushing process is (1-4):1, the crushing process time is 4-12 hours, and the crushing process is carried out under an argon atmosphere.
[0015] In one embodiment, the hydrogen absorption catalyst is calcium particles, or metal particles, and the metal particles are metal particles with a hydrogen absorption activity greater than that of titanium;
[0016] The purity of the calcium particles is 99-99.9%, and the particle size of the calcium particles is 1-10 mm;
[0017] The mass ratio of the calcium particles to the titanium hydride powder is (1-10):1.
[0018] In one embodiment, the titanium hydride powder and the hydrogen absorption catalyst are separated by a stainless steel wire mesh and placed in a material boat of the dehydrogenation furnace, and the hydrogen absorption catalyst is placed above the titanium hydride powder.
[0019] In one embodiment, the temperature of the dehydrogenation treatment is 550-650°C, and the vacuum degree in the dehydrogenation furnace is less than 10 -2 Pa, the cooling process is protected by high-purity argon gas.
[0020] In one embodiment, the ratio of balls to materials in the screening and grading process is (1-4):1, the time of the screening and grading process is 1-4 hours, and the screening and grading process is carried out under an argon atmosphere.
[0021] In a second aspect of the embodiment of the present application, a titanium powder is provided. The titanium powder is prepared by the method for preparing low-oxygen titanium powder by the hydrogenation-dehydrogenation method in the first aspect of the embodiment of the present application.
[0022] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:
[0023] The method for preparing low-oxygen titanium powder by the hydrogenation and dehydrogenation method provided in the embodiment of the present application is firstly to place the titanium sponge into a hydrogenation furnace, hydrogenate the titanium sponge in a hydrogen atmosphere to obtain a titanium hydride material, then use a vacuum crushing and screening machine to crush the titanium hydride material to obtain titanium hydride powder, then place the titanium hydride powder and the hydrogen absorption catalyst into the dehydrogenation furnace for dehydrogenation to obtain pure titanium powder, and finally place the pure titanium powder into a vacuum crushing and screening machine for screening and grading to obtain low-oxygen titanium powder. The method for preparing low-oxygen titanium powder by the hydrogenation and dehydrogenation method provided in the embodiment of the present application introduces a hydrogen absorption catalyst in the dehydrogenation process, so that a continuous internal and external pressure difference is formed during the decomposition of titanium hydride, which promotes the decomposition and diffusion of H atoms, significantly shortens the dehydrogenation process time, improves production efficiency, and at the same time alleviates the agglomeration phenomenon caused by the high-temperature and long-term sintering of the titanium material in the dehydrogenation process, accelerates the crushing and grading process of the titanium powder in the next step, and then reduces the amount of oxygen added. The process operation is simple, the applicability is strong, and it can meet the requirements of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 A flow chart of a method for preparing low-oxygen titanium powder by a hydrogenation-dehydrogenation method provided in an embodiment of the present application;
[0025] Figure 2 A schematic diagram of the principle of rapid decomposition of titanium hydride provided in an embodiment of the present application;
[0026] Figure 3 This is a schematic diagram of the loading structure of the dehydrogenation process provided in an embodiment of the present application. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0028] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.
[0029] Additionally, the use of “based on” or “according to” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” or “according to” one or more conditions or values may, in practice, be based on additional conditions or beyond values.
[0030] Titanium is widely used in biomedicine, aerospace, hydrogen storage and energy due to its excellent specific strength, corrosion resistance and low density. At present, the preparation methods of titanium powder include hydrogenation and dehydrogenation, gas atomization, mechanical pulverization, rotating electrode method, etc. Among them, hydrogenation and dehydrogenation has low production cost, simple principle and easy operation, high raw material utilization rate, and can prepare fine-particle titanium powder according to demand. It is currently the commonly used method for preparing titanium powder.
[0031] The titanium powder prepared by the conventional hydrogenation-dehydrogenation method has an irregular shape and a large specific surface area. The dehydrogenation process takes a long time and the powder is easy to agglomerate, so it needs to be crushed and refined again after dehydrogenation. The surface activity of the powder after dehydrogenation is extremely high, and it is very easy to react with oxygen, resulting in serious oxygenation of the titanium powder. The long-term high-temperature dehydrogenation and subsequent crushing and grading process significantly increase the oxygen content of the prepared titanium powder. The high-oxygen content of the titanium powder seriously limits the mechanical properties and application of the titanium material prepared therefrom.
[0032] In order to improve the dehydrogenation efficiency of titanium hydride and reduce the hydrogen release time of the dehydrogenation process, the present application intends to reduce the pressure in the furnace during the dehydrogenation process of the hydrogenation dehydrogenation method, establish a continuous Ti-H system structure with internal and external pressure and concentration differences, accelerate the diffusion of H atoms from the Ti-H body to the surface, and combine them into H2 diffusion, efficiently complete the dehydrogenation process of titanium hydride powder, and realize the preparation of low-cost, high-efficiency, and low-oxygen content titanium powder.
[0033] The present application provides a method for preparing low-oxygen titanium powder by hydrogenation and dehydrogenation, such as Figure 1 As shown, the method comprises the following steps:
[0034] Step 101: Place titanium sponge in a hydrogenation furnace, and perform hydrogenation treatment on the titanium sponge in a hydrogen atmosphere to obtain titanium hydride material.
[0035] Optionally, the purity of the titanium sponge is 99.6-99.99%, and the particle size of the titanium sponge is 1-10 mm. The purity of the hydrogen is 99.9-99.99%. The temperature of the hydrogenation treatment is 400-600° C., and the holding time of the hydrogenation treatment is 3-9 hours.
[0036] Step 102: Using a vacuum crushing and screening machine to crush the titanium hydride material to obtain titanium hydride powder.
[0037] The ball-to-material ratio of the crushing process is (1-4):1, the time of the crushing process is 4-12 hours, and the crushing process is carried out under an argon atmosphere.
[0038] Step 103: placing the titanium hydride powder and the hydrogen absorption catalyst into a dehydrogenation furnace for dehydrogenation treatment to obtain pure titanium powder.
[0039] Optionally, the hydrogen absorption catalyst is made of calcium particles, or metal particles, wherein the metal particles have a hydrogen absorption activity greater than that of titanium, and the hydride corresponding to the metal particles has good thermal stability. Figure 2 Shown is a schematic diagram of the principle of rapid decomposition of titanium hydride.
[0040] The purity of the calcium particles is 99-99.9%, the particle size of the calcium particles is 1-10 mm, and the mass ratio of the calcium particles to the titanium hydride powder is (1-10):1.
[0041] Optionally, the titanium hydride powder and the hydrogen absorption catalyst are separated by a stainless steel wire mesh and placed in a material boat of the dehydrogenation furnace. The hydrogen absorption catalyst is placed above the titanium hydride powder. Figure 3 The figure shows the schematic diagram of the charging structure of the dehydrogenation process. Figure 3 In the middle loading structure, 1 is calcium particles, 2 is stainless steel wire mesh, 3 is titanium hydride powder, and 4 is a material boat.
[0042] The temperature of the dehydrogenation treatment is 550-650°C, and the vacuum degree in the dehydrogenation furnace is less than 10 -2 Pa, the cooling process is protected by high-purity argon gas.
[0043] The stainless steel wire mesh is made of S31603 or S30408, 80-200 meshes, single layer or multi-layer composite. The material of the material boat is S30408, S31603, 310S stainless steel or Al2O3 ceramic.
[0044] Step 104: Put the pure titanium powder into a vacuum crushing and screening machine for screening and grading to obtain low-oxygen titanium powder.
[0045] Optionally, the ratio of balls to materials in the screening and grading process is (1-4):1, the time of the screening and grading process is 1-4 hours, and the screening and grading process is carried out under a high-purity argon atmosphere.
[0046] The method for preparing low-oxygen titanium powder by the hydrogenation and dehydrogenation method provided in the embodiment of the present application is firstly to place the titanium sponge into a hydrogenation furnace, hydrogenate the titanium sponge in a hydrogen atmosphere to obtain a titanium hydride material, then use a vacuum crushing and screening machine to crush the titanium hydride material to obtain titanium hydride powder, then place the titanium hydride powder and the hydrogen absorption catalyst into the dehydrogenation furnace for dehydrogenation to obtain pure titanium powder, and finally place the pure titanium powder into a vacuum crushing and screening machine for screening and grading to obtain low-oxygen titanium powder. The method for preparing low-oxygen titanium powder by the hydrogenation and dehydrogenation method provided in the embodiment of the present application introduces a hydrogen absorption catalyst in the dehydrogenation process, so that a continuous internal and external pressure difference is formed during the decomposition of titanium hydride, which promotes the decomposition and diffusion of H atoms, significantly shortens the dehydrogenation process time, improves production efficiency, and at the same time alleviates the agglomeration phenomenon caused by the high-temperature and long-term sintering of the titanium material in the dehydrogenation process, accelerates the crushing and grading process of the titanium powder in the next step, and then reduces the amount of oxygen added. The process operation is simple, the applicability is strong, and it can meet the requirements of industrial production.
[0047] Based on the above-mentioned method for preparing low-oxygen titanium powder by hydrogenation and dehydrogenation, the present embodiment provides a titanium powder, which is prepared by the method for preparing low-oxygen titanium powder by hydrogenation and dehydrogenation provided in the embodiment of the present application. The method for preparing low-oxygen titanium powder by hydrogenation and dehydrogenation comprises:
[0048] placing the titanium sponge into a hydrogenation furnace, and performing a hydrogenation treatment on the titanium sponge under a hydrogen atmosphere to obtain a titanium hydride material;
[0049] Using a vacuum crushing and screening machine to crush the titanium hydride material to obtain titanium hydride powder;
[0050] placing the titanium hydride powder and the hydrogen absorption catalyst into a dehydrogenation furnace for dehydrogenation treatment to obtain pure titanium powder;
[0051] The pure titanium powder is placed in a vacuum crushing and screening machine for screening and grading to obtain low-oxygen titanium powder.
[0052] In one embodiment, the purity of the titanium sponge is 99.6-99.99%, and the particle size of the titanium sponge is 1-10 mm.
[0053] In one embodiment, the purity of the hydrogen is 99.9-99.99%.
[0054] In one embodiment, the temperature of the hydrogenation treatment is 400-600° C., and the holding time of the hydrogenation treatment is 3-9 hours.
[0055] In one embodiment, the ball-to-material ratio of the crushing process is (1-4):1, the crushing process time is 4-12 hours, and the crushing process is carried out under an argon atmosphere.
[0056] In one embodiment, the hydrogen absorption catalyst is calcium particles, or metal particles, and the metal particles are metal particles with a hydrogen absorption activity greater than that of titanium;
[0057] The purity of the calcium particles is 99-99.9%, and the particle size of the calcium particles is 1-10 mm;
[0058] The mass ratio of the calcium particles to the titanium hydride powder is (1-10):1.
[0059] In one embodiment, the titanium hydride powder and the hydrogen absorption catalyst are separated by a stainless steel wire mesh and placed in a material boat of the dehydrogenation furnace, and the hydrogen absorption catalyst is placed above the titanium hydride powder.
[0060] In one embodiment, the temperature of the dehydrogenation treatment is 550-650°C, and the vacuum degree in the dehydrogenation furnace is less than 10 -2 Pa, the cooling process is protected by high-purity argon gas.
[0061] In one embodiment, the ratio of balls to materials in the screening and grading process is (1-4):1, the time of the screening and grading process is 1-4 hours, and the screening and grading process is carried out under an argon atmosphere.
[0062] The method for preparing low-oxygen titanium powder by the hydrogenation-dehydrogenation method provided in the above embodiment. The present application also provides some specific embodiments. The following embodiments describe the technical scheme of the present application in more detail, and these embodiments are only used for illustrative purposes, because it is obvious to those skilled in the art to make various modifications and changes within the scope of the disclosure of the present application. The reagents used in the embodiments can be obtained by commercial purchase or synthesized according to conventional methods, and can be used directly without further treatment, and the instruments and devices used in the embodiments can be obtained by commercial purchase.
[0063] Example 1
[0064] Place a titanium sponge with a particle size of 3 mm in a hydrogenation furnace, hydrogenate it in a 99.9% pure hydrogen atmosphere, the hydrogenation temperature is 450°C, and it is kept warm for 4 hours to obtain a titanium hydride material; crush the titanium hydride material in a vacuum crushing and screening machine, protect it with a high-purity argon atmosphere, the ball-to-material ratio is 2:1, crush it for 6 hours, and rest for 30 minutes after 2 hours to obtain a -200 mesh titanium hydride powder; lay the titanium hydride powder in the material boat of the dehydrogenation furnace, the material thickness is less than 100 mm, a 100-mesh stainless steel wire mesh is installed on the titanium hydride powder, and calcium particles with a particle size of 2 mm are placed on the wire mesh, the mass ratio of calcium particles to titanium hydride powder is 3:1, and at the same time, ensure that the calcium particles are evenly covered on the wire mesh, and completely isolate the titanium hydride powder from the furnace cavity, the dehydrogenation temperature is 600°C, and the temperature is kept until the vacuum degree is maintained at 10 -2Pa, fill with argon to cool down and obtain pure titanium powder; put the pure titanium powder in a special vacuum crushing and screening machine, crush, screen and grade the slightly agglomerated titanium powder, protect it with high-purity argon atmosphere, with a ball-to-material ratio of 1:1, and crushing time of 2h, with an interval of 30min and a rest of 10min, to finally obtain low-oxygen titanium powder with required particle size and purity.
[0065] Example 2
[0066] Place a titanium sponge with a particle size of 3 mm in a hydrogenation furnace, hydrogenate under a 99.9% pure hydrogen atmosphere, the hydrogenation temperature is 450°C, and the temperature is kept for 6 hours to obtain a titanium hydride material; crush the titanium hydride material in a vacuum crushing and screening machine, protect it with a high-purity argon atmosphere, the ball-to-material ratio is 2:1, crush it for 6 hours, and rest for 30 minutes after 2 hours to obtain a -200 mesh titanium hydride powder; spread the titanium hydride powder in a dehydrogenation material boat, the material thickness is less than 100 mm, a 100-mesh stainless steel wire mesh is installed on the titanium hydride powder, and calcium particles with a particle size of 2 mm are placed on the wire mesh, the mass ratio of calcium particles to titanium hydride powder is 4:1, and at the same time, ensure that the calcium particles are evenly covered on the wire mesh, and completely isolate the titanium hydride powder from the furnace cavity, the dehydrogenation temperature is 600°C, and the temperature is kept until the vacuum degree is maintained at 10 -2 Pa, fill with argon to cool down and obtain pure titanium powder; put the pure titanium powder in a special vacuum crushing and screening machine, crush and grade the slightly agglomerated titanium powder, protect it with high-purity argon atmosphere, with a ball-to-material ratio of 1:1, and crushing time of 2h, with an interval of 30min and a rest of 10min, to finally obtain low-oxygen titanium powder with required particle size and purity.
[0067] Example 3
[0068] Place a titanium sponge with a particle size of 3 mm in a hydrogenation furnace, hydrogenate under a 99.9% pure hydrogen atmosphere, the hydrogenation temperature is 500°C, and the temperature is kept for 4 hours to obtain a titanium hydride material; crush the titanium hydride material in a vacuum crushing and screening machine, protect it with a high-purity argon atmosphere, the ball-to-material ratio is 2:1, crush it for 6 hours, and rest for 30 minutes after 2 hours to obtain a -200 mesh titanium hydride powder; spread the titanium hydride powder in a dehydrogenation material boat, the material thickness is less than 100 mm, a 100-mesh stainless steel wire mesh is installed on the titanium hydride powder, and calcium particles with a particle size of 2 mm are placed on the wire mesh, the mass ratio of calcium particles to titanium hydride powder is 5:1, and at the same time, ensure that the calcium particles are evenly covered on the wire mesh, and completely isolate the titanium hydride powder from the furnace cavity, the dehydrogenation temperature is 600°C, and the temperature is kept until the vacuum degree is maintained at 10 -2 Pa, fill with argon to cool down and obtain pure titanium powder; put the pure titanium powder in a special vacuum crushing and screening machine, crush and grade the slightly agglomerated titanium powder, protect it with high-purity argon atmosphere, with a ball-to-material ratio of 1:1, and crushing time of 2h, with an interval of 30min and a rest of 10min, to finally obtain low-oxygen titanium powder with required particle size and purity.
[0069] The present invention adopts a hydrogenation and dehydrogenation method to efficiently prepare low-oxygen titanium powder, and introduces hydrogen absorption catalyst calcium particles in the dehydrogenation process. During the titanium hydride dehydrogenation process, as the temperature rises, H atoms leave the powder body, diffuse to the surface, and combine on the powder surface to form H2 diffusion, and quickly react with metal calcium to generate calcium hydride. Under the continuous operation of the vacuum unit, the dehydrogenation furnace cavity is kept in a negative pressure state. Under the combined effect of the pressure difference in the furnace and the titanium hydride powder structure and the H atom concentration difference, H atoms are prompted to quickly diffuse from the powder body to the powder surface, and released into the material boat in the H2 state, accelerating the decomposition of titanium hydride, reducing the high-temperature sintering time, and significantly improving the sintering and agglomeration phenomenon between the titanium powder obtained by the decomposition of the titanium hydride powder due to the high temperature. In the next step of titanium powder crushing and grading and easy oxygenation process, the titanium powder of the required particle size can be obtained by crushing in a short time. At the same time, the calcium particles can also react with O2 and N2 in the air infiltrated in the low vacuum state of the dehydrogenation furnace, reduce the O and N content of the titanium powder, and finally obtain the required low-oxygen high-purity titanium powder.
[0070] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0071] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.
Claims
1. A method for preparing low-oxygen titanium powder by hydrogenation and dehydrogenation, characterized in that: The method comprises: Putting the titanium sponge into a hydrogenation furnace, and performing a hydrogenation treatment on the titanium sponge under a hydrogen atmosphere to obtain a titanium hydride material; Using a vacuum crushing and screening machine to crush the titanium hydride material to obtain titanium hydride powder; placing the titanium hydride powder and the hydrogen absorption catalyst into a dehydrogenation furnace for dehydrogenation treatment to obtain pure titanium powder; The pure titanium powder is placed in a vacuum crushing and screening machine for screening and grading to obtain low-oxygen titanium powder.
2. The method according to claim 1, characterized in that: The purity of the titanium sponge is 99.6-99.99%, and the particle size of the titanium sponge is 1-10 mm.
3. The method according to claim 1, characterized in that The purity of the hydrogen is 99.9-99.99%.
4. The method according to claim 1, characterized in that: The temperature of the hydrogenation treatment is 400-600° C., and the heat preservation time of the hydrogenation treatment is 3-9 hours.
5. The method according to claim 1, characterized in that The ball-to-material ratio of the crushing process is (1-4):1, the time of the crushing process is 4-12 hours, and the crushing process is carried out under an argon atmosphere.
6. The method according to claim 1, characterized in that The hydrogen absorption catalyst is made of calcium particles or metal particles, and the metal particles are metal particles with a hydrogen absorption activity greater than that of titanium; The purity of the calcium particles is 99-99.9%, and the particle size of the calcium particles is 1-10 mm; The mass ratio of the calcium particles to the titanium hydride powder is (1-10):
1.
7. The method according to claim 1, characterized in that The titanium hydride powder and the hydrogen absorption catalyst are separated by a stainless steel wire mesh and placed in a material boat of the dehydrogenation furnace, and the hydrogen absorption catalyst is placed above the titanium hydride powder.
8. The method according to claim 1, characterized in that: The temperature of the dehydrogenation treatment is 550-650°C, and the vacuum degree in the dehydrogenation furnace is less than 10 -2 Pa, the cooling process is protected by argon gas.
9. The method according to claim 1, characterized in that: The ball-to-material ratio in the screening and grading process is (1-4):1, the time of the screening and grading process is 1-4 hours, and the screening and grading process is carried out under an argon atmosphere.
10. A titanium powder, characterized in that: The titanium powder is prepared by the method for preparing low-oxygen titanium powder by hydrogenation-dehydrogenation method according to any one of claims 1 to 9.