Hydrogenation device for producing titanium powder through hydrogenation and dehydrogenation

Abstract

The utility model discloses a hydrogenation device for producing titanium powder through hydrogenation dehydrogenation, which comprises a heating furnace and a reactor, the structure of the hydrogenation device is designed in the scheme, and the reactor is horizontally arranged and rotates around a horizontal axis relative to the heating furnace under the matching of a driving mechanism and a connecting mechanism. Hydrogen input from the ventilation pipeline makes contact with the surface of the titanium strip to the maximum extent, the qualified hydrogenation part of the titanium strip impacts the cavity wall to be crushed into particles in the rotating process, the contact area of the titanium strip and the hydrogen is enlarged synchronously, the hydrogenation process is uniform, efficiency is improved, time is shortened, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium powder preparation, in particular to a hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation. Background Art

[0002] At present, the most common method for producing titanium powder is the hydrogenation dehydrogenation process - HDH. The basic principle of producing titanium powder by the hydrogenation dehydrogenation process can be expressed as follows:

[0003] Hydrogenation: Ti+x / 2H2→TiHx(x=1.88~1.99)t>300℃

[0004] Dehydrogenation: TiHx→Ti+x / 2H2(x=1.88~1.99)t>300℃

[0005] The main process is to first hydrogenate high-purity titanium bars to obtain titanium hydride powder, then crush and grade the titanium hydride powder under a protective atmosphere, and finally dehydrogenate the crushed and graded titanium hydride powder under vacuum to obtain qualified titanium powder after inspection.

[0006] The defect is that when the existing hydrogenation furnace is hydrogenated, due to the dense texture of the high-purity titanium bars, the hydrogenation process is uneven, incomplete, and takes a long time. Occasionally, the hydrogenation is repeated after the bars are taken out of the furnace and then put back into the furnace for re-hydrogenation. This needs to be improved. Utility Model Content

[0007] In order to solve at least one of the above technical defects, the utility model provides the following technical solutions:

[0008] The present application document discloses a hydrogenation device for producing titanium powder by hydrogenation-dehydrogenation, comprising a heating furnace and a reactor. The hydrogenation reaction section in the reactor is located in the heating furnace chamber, and the reactor is heated by the heating furnace. A cover plate is arranged at the inlet of the head end of the reactor, and the ventilation pipe is connected with the reactor chamber for gas supply. The reactor is arranged horizontally, and a driving mechanism and a connecting mechanism are arranged outside the heating furnace. The driving mechanism is connected to the cover plate at the head end of the reactor by a connecting mechanism, and the driving mechanism drives the reactor to rotate around a horizontal axis relative to the heating furnace.

[0009] The structure of the hydrogenation device is designed in this scheme. The reactor is placed horizontally and rotates around the horizontal axis relative to the heating furnace with the cooperation of the driving mechanism and the connecting mechanism. For example, when titanium powder is prepared, during the rotation of the reactor, the hydrogen input from the ventilation pipe contacts the surface of the titanium bar to the greatest extent, and during the rotation, the hydrogenated part of the titanium bar hits the cavity wall and breaks into particles, which simultaneously expands the contact area between the titanium bar and the hydrogen. The hydrogenation process is uniform and the efficiency is improved, the time is reduced, and the energy consumption is reduced.

[0010] Furthermore, a heat insulation mechanism is arranged in the inlet cavity of the reactor to avoid affecting the connection mechanism, the driving mechanism and the like.

[0011] Furthermore, the heat insulation mechanism is a heat insulation screen, which can be directly purchased from the market, and is convenient for installation and replacement.

[0012] Furthermore, an inlet is arranged on the side of the heating furnace, and the hydrogenation reaction section of the reactor extends into the cavity from the inlet, and the side opening is convenient for docking.

[0013] Furthermore, the head end of the reactor is outside the inlet, and a cooling water jacket is arranged at the head end of the reactor. The position selection of the head end of the reactor and the installation of the cooling water jacket are aimed at reducing the influence of high temperature on the cover plate, connecting mechanism and the like.

[0014] Furthermore, the driving mechanism includes a motor and a reducer, the reducer is connected to the motor and an output end of the reducer is connected to the connecting mechanism.

[0015] Furthermore, the connecting mechanism includes a connecting shaft, a bearing, and a coupling. The head end of the connecting shaft is connected to the cover plate and the tail end is connected to the output end of the driving mechanism through the coupling. A bearing is arranged on the connecting shaft to facilitate docking installation.

[0016] Furthermore, a vacuum pipe is provided on the cover plate, and the vacuum pipe is connected with the reactor cavity, for example, to vacuum and detect leaks, or to maintain a suitable pressure and vacuum degree in the cavity.

[0017] Furthermore, the ventilation duct extends from a hole formed at the side end of the heating furnace and along the axial center line of the reactor. The reactor rotates around its axial center line, and the ventilation duct is rotationally connected to the center of the rear end of the reactor, limiting the rotation center line of the reactor to facilitate the connection of the ventilation duct.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The utility model designs the structure of the titanium powder hydrogenation device. The reactor rotates relative to the heating furnace. During the rotation, the titanium bars are collided and broken into particles. During the rotation, the hydrogen is kept in contact with the surface of the titanium bars to the greatest extent. The hydrogenation process is uniform, the efficiency is improved, the time is reduced, and the energy consumption is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic structural diagram of a hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation in Example 1;

[0022] Wherein, the accompanying drawings are marked as follows:

[0023] 1. Ventilation duct; 2. Heating furnace; 3. Reactor; 4. Heat insulation screen; 5. Cover plate; 6. Evacuation duct; 7. Bearing 2; 8. Reducer; 9. Motor; 10. Cooling water jacket; 11. Bearing 1; 12. Coupling; 13. Connecting shaft. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] like Figure 1 As shown, in this example, a hydrogenation device for producing titanium powder by hydrogenation-dehydrogenation comprises a heating furnace 2 and a reactor 3. The inlet of the heating furnace 2 is at the side, and the reactor 3 is placed horizontally. The hydrogenation reaction section of the reactor 3 extends from the inlet into the cavity of the heating furnace 2. A heating element is installed in the furnace of the heating furnace 2, and the reactor in the furnace is heated synchronously by the heating element.

[0027] The head end of the reactor 3 is located at the entrance of the heating furnace 2. The head end of the reactor 3 is formed with an inlet and sealed with a cover plate 5. The cover plate is fixed to the flange at the head end of the reactor by a vacuum rubber pad, bolts, etc.

[0028] A driving mechanism and a connecting mechanism are installed outside the heating furnace 2. For example, the driving mechanism and the connecting mechanism are placed outside the entrance of the heating furnace 2. The driving mechanism is connected to the cover plate 5 at the head end of the reactor outside the entrance by a connecting mechanism. The driving mechanism drives the reactor to rotate around a horizontal axis relative to the heating furnace, such as the reactor rotates around its own axial center line.

[0029] A through hole is formed at the side of the heating furnace 2 corresponding to the inlet and at the position corresponding to the axial center line of the reactor. The ventilation pipe 1 extends from the through hole into the cavity of the heating furnace 2 and extends along the axial center line of the reactor 3. A through hole is formed at the center of the tail end of the reactor 3. The end of the ventilation pipe extends from the through hole into the hydrogenation reaction section cavity of the reactor. A dynamic seal is installed at the through hole of the ventilation pipe 1 to maintain the sealing performance during the rotation of the reactor. Hydrogen is input through the ventilation pipe when in use.

[0030] The driving mechanism includes a motor 9 and a reducer 8. The reducer 8 is connected to the motor 9 and the output end of the reducer 8 is connected to the connecting mechanism. The connecting mechanism includes a connecting shaft 13, a bearing, and a coupling 12. The head end of the connecting shaft 13 is fixed to the cover plate 5, and the tail end of the connecting shaft 13 is connected to the output end of the reducer 8 through the wheel-type coupling 12. The axial center line of the connecting shaft 13 is on the same straight line as the axial center line of the reactor 3. The bearing is installed on the connecting shaft 13. Figure 1As shown, bearing 1 11 and bearing 2 7 are sequentially installed on the connecting shaft 13 to facilitate the improvement of the rotation stability after docking installation.

[0031] In order to improve the thermal insulation performance, a thermal insulation mechanism, such as a thermal insulation screen 4, may be installed in the inlet cavity of the reactor 3. After the material is loaded into the reactor, the thermal insulation screen is installed and then the cover plate is fixed.

[0032] A cooling water jacket 10 is installed at the head end of the reactor 3. The cooling water jacket can be purchased directly from the market to reduce the impact of high temperature on the cover plate, connecting mechanism, etc.

[0033] In addition, an evacuation pipe 6 may be installed at the outward end surface of the cover plate 5, and the evacuation pipe is connected to the reactor cavity to maintain appropriate pressure, vacuum degree, etc. in the cavity.

[0034] When in use, 1. soak 50Kg-100kg, 0-50mm high-purity titanium bars in a mixed solution of nitric acid and hydrofluoric acid for 8-24 hours.

[0035] 2. Wash the pickled high-purity titanium strip with water for 1-2 times, and place it in a vacuum drying oven for heating and drying. The heating temperature is 90-150°C and the ultimate vacuum is ≤20Pa.

[0036] 3. Place the dried high-purity titanium strip in the reactor 3 and install a heat shield 4.

[0037] 4. Connect the flange at the inlet of the reactor 3 and the cover plate 5 with bolts.

[0038] 5. The reactor is evacuated through the evacuation pipe 6 for leak detection, the ultimate vacuum is ≤10Pa, and the pressure rise rate is 0.2Pa / min.

[0039] 6. The hydrogenation reaction section of the reactor is placed in the heating furnace cavity, and the motor 9 is started to rotate the reactor 3. The temperature is initially raised to 250°C and kept constant for 2 hours, then raised to 750°C-800°C and kept constant for 4 hours, then lowered to 550°C, and the hydrogen valve is opened to start hydrogen flow. During the process, the temperature is controlled at 550°C-650°C. After the hydrogen absorption is completed, the reactor is cooled and taken out of the furnace to obtain titanium hydride for subsequent process operations.

[0040] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation, comprising a heating furnace (2) and a reactor (3), wherein the hydrogenation reaction section in the reactor (3) is located in the cavity of the heating furnace (2), and the reactor is heated by the heating furnace, a cover plate (5) is arranged at the inlet of the head end of the reactor (3), and a ventilation pipe (1) is connected to the cavity of the reactor (3) for gas supply, characterized in that: The reactor (3) is placed horizontally, and a driving mechanism and a connecting mechanism are arranged outside the heating furnace (2). The driving mechanism is connected to the cover plate (5) at the head end of the reactor by the connecting mechanism, and the driving mechanism drives the reactor to rotate around a horizontal axis relative to the heating furnace (2).

2. A hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation as claimed in claim 1, characterized in that: A heat insulation mechanism is arranged in the inlet cavity of the reactor (3).

3. A hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation as claimed in claim 2, characterized in that: The heat insulation mechanism is a heat insulation screen (4).

4. A hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation as claimed in claim 1, characterized in that: An inlet is arranged on the side of the heating furnace (2), and the hydrogenation reaction section of the reactor (3) extends into the cavity from the inlet.

5. A hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation as claimed in claim 4, characterized in that: The head end of the reactor (3) is outside the inlet, and a cooling water jacket (10) is arranged at the head end of the reactor (3).

6. A hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation as claimed in claim 1, characterized in that: The driving mechanism comprises a motor (9) and a reducer (8); the reducer (8) is connected to the motor (9) and the output end of the reducer (8) is connected to the connecting mechanism.

7. A hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation as claimed in claim 1, characterized in that: The connecting mechanism comprises a connecting shaft (13), a bearing, and a coupling (12); the connecting shaft (13) has a head end connected to the cover plate (5) and a tail end connected to the output end of the driving mechanism through the coupling (12); and the connecting shaft (13) is provided with a bearing.

8. A hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation as claimed in claim 1, characterized in that: An evacuation pipe (6) is provided on the cover plate (5), and the evacuation pipe (6) is connected to the cavity of the reactor (3).

9. A hydrogenation device for producing titanium powder by hydrogenation and dehydrogenation as claimed in claim 1, characterized in that: The ventilation pipe (1) extends from a hole formed at the side end of the heating furnace (2) and extends along the axial center line of the reactor (3). The reactor (3) rotates around its axial center line, and the ventilation pipe (1) is rotatably connected to the center of the tail end of the reactor (3).

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