Production system and preparation method of titanium hydride

Abstract

The invention belongs to the technical field of powder metallurgy, and discloses a titanium hydride production system and a preparation method.The production system comprises a transverse reaction bin provided with a hopper, a conveying mechanism, a material taking unit, a hydrogen injection variable pressure unit, a reaction unit and a cooling unit, and the material taking unit, the hydrogen injection variable pressure unit, the reaction unit and the cooling unit are sequentially connected and are connected end to end through the conveying mechanism; the transverse reaction bin is sequentially conveyed among the units through the conveying mechanism, more than two parallel sliding rails are fixedly arranged on the inner side wall of the bin body, the transverse reaction bin can be circularly conveyed in a production system through the end-to-end functional unit structures, different preparation processes are carried out on the reaction bins of different units within the same time, and the productivity is remarkably improved. According to the titanium hydride production system, high-yield titanium hydride preparation is achieved, the yield is increased by 20 times, and the titanium hydride production system is energy-saving and efficient. The method is suitable for industrial mass production of titanium hydride.

Description

Technical Field

[0001] The invention belongs to the technical field of powder metallurgy and relates to a titanium hydride production device, in particular to a titanium hydride production system and a preparation method. Background Art

[0002] Titanium hydride is a gray powder with a metallic appearance and is often used to make lightweight metal foam materials. During the foaming process, titanium hydride can release hydrogen, promote the foaming reaction in the metal matrix, and react chemically with alloys such as copper and aluminum to form bubbles, thereby improving the strength and lightweight of the material.

[0003] At present, the production capacity of titanium hydride is still relatively insufficient. On the one hand, the reason is that the reaction of hydrogen and titanium to generate titanium hydride can only be completed under high temperature and high pressure, which requires the production equipment (kiln) to have high sealing, high temperature resistance and compressive strength. These properties put forward higher requirements on the internal structure of the kiln, resulting in a small space in the furnace for placing reactants, which affects the production capacity. On the other hand, the kilns currently used to produce titanium hydride are mostly three-dimensional kilns, such as the Chinese utility model patent with the authorization announcement number CN220835447U. The vertical furnace body requires that both the addition of reactants and the removal of products require the removal of a shelf (with reactants or products) with a length close to the height of the furnace from the lid on the top of the furnace, which is inconvenient to operate, prolongs the time for adding and removing materials, and has a high risk of safety problems when the shelf is tilted. In addition, three-dimensional kilns often use radiation heating, and the heating surface has limitations, resulting in uneven heating of the reactants, which requires the reaction time to be extended to about 6 hours. The energy consumption is high and the production efficiency is low, which further reduces production capacity. Generally, the output of each furnace is still between 10-30 kilograms, which cannot meet the market demand for titanium hydride.

[0004] Therefore, it is necessary to improve the production equipment of titanium hydride to increase production capacity and enhance the safety of industrial production of titanium hydride. Summary of the invention

[0005] In order to solve the above-mentioned deficiencies in the prior art, the present invention gets rid of the traditional structural design of the three-dimensional kiln, and adopts a horizontal reaction chamber with a special hopper structure in combination with induction coil heating, which is convenient for charging and taking out materials, improves safety performance and single furnace production capacity, and at the same time, through a circulating production system with different functional units, multiple reaction chambers can simultaneously perform their respective functions in different functional units, thereby achieving the purpose of further improving the titanium hydride production capacity.

[0006] The present invention also provides a method for preparing titanium hydride in conjunction with the titanium hydride production system, thereby reducing energy consumption, improving safety performance, and solving the problem of insufficient titanium hydride production capacity.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A titanium hydride production system comprises a transverse reaction chamber equipped with a hopper, a transmission mechanism, and a material taking unit, a hydrogen injection pressure changing unit, a reaction unit and a cooling unit connected in sequence; each unit is connected end to end through the transmission mechanism; The transverse reaction chamber is sequentially transferred between the units through a transmission mechanism; The transverse reaction bin includes a bin body, bin covers located at both ends of the bin body and movably connected to the bin body, inlet and outlet air valves and a pressure gauge fixed to the bin body, and the inner side wall of the bin body is fixed with more than two parallel slide rails, and the hopper cooperating with the slide rails can slide on the slide rails to enter and exit the transverse reaction bin.

[0008] As a limitation of the present invention, the feeding and taking unit is provided with a feeding and taking mechanism and a first transverse reaction bin fixing area; the feeding and taking mechanism is used to feed or take material into the hopper; The hydrogen injection pressure transformation unit is provided with a first heating mechanism, a gas pipeline, and a second transverse reaction chamber fixing area; The reaction unit is provided with a second heating mechanism, a gas pipeline and a third transverse reaction chamber fixing area; The cooling unit is provided with a cooling mechanism and a fourth transverse reaction chamber fixing area; The transverse reaction chamber is detachably connected to the transverse reaction chamber fixing area.

[0009] As a further limitation of the present invention, the two slide rails located in a horizontal plane constitute a group of slide rails, and each group of slide rails has a hopper matched therewith.

[0010] As a further limitation of the present invention, there are three groups of slide rails, which are used to install the upper hopper, the middle hopper and the lower hopper respectively, and each hopper layer is composed of a number of detachably connected hopper units; the hopper unit has a accommodating cavity and can be loaded separately.

[0011] As another limitation of the present invention, the heating mechanism contains a medium frequency induction coil that matches the shape of the chamber.

[0012] As a further limitation of the present invention, the cooling mechanism is a shower cooling mechanism.

[0013] The present invention also provides a method for preparing titanium hydride, which uses the above-mentioned titanium hydride production system to prepare titanium hydride, wherein the transverse reaction chamber includes a first transverse reaction chamber, a second transverse reaction chamber, a third transverse reaction chamber and a fourth transverse reaction chamber, which are circulated and transmitted in the production system through a transmission mechanism.

[0014] As a limitation of the present invention, the bin cover is opened, the hopper of the first transverse reaction bin is taken out, the titanium powder is loaded into the hopper by the feeding and taking mechanism, the bin cover is closed, and the first transverse reaction bin is transferred from the first transverse reaction bin fixed area to the second transverse reaction bin fixed area via the transmission mechanism; the first heating mechanism is used to heat to 200°C, and the gas pipeline is evacuated to a negative pressure state, and hydrogen is filled to a pressure of 3000-4000Pa, and the bin is transferred to the third transverse reaction bin fixed area via the transmission mechanism, and the second heating mechanism is used to heat the bin to 500-600°C within 2 hours and maintained for more than 2 hours until the reaction is completed, and then the first transverse reaction bin is moved to the fourth transverse reaction bin fixed area, and the temperature is reduced to a constant pressure by the cooling mechanism, and the bin is transferred to the first transverse reaction bin fixed area, and after exhausting, the titanium hydride is taken out and then the titanium powder is loaded, and the next cycle of cyclic transmission is started; After the previous transverse reaction bin leaves the transverse reaction bin fixing area, the next transverse reaction bin is taken to fill its place until the first transverse reaction bin, the second transverse reaction bin, the third transverse reaction bin and the fourth transverse reaction bin are all connected to the transverse reaction bin fixing area or the transmission mechanism.

[0015] As a further limitation of the present invention, in the titanium hydride production system, each unit and the transmission mechanism encloses a rectangle with a length of 60 m and a width of 30 m.

[0016] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art: The titanium hydride production system of the present invention is a recyclable structure connected end to end. The horizontal reaction chamber is circulated among the four units, namely the material taking unit, the hydrogen injection and pressure transformation unit, the reaction unit and the cooling unit, in turn through a transmission mechanism. Different process steps can be carried out by each unit in the same time period. While greatly saving time costs, the reaction chamber and the slide rail structure designed with the horizontal structure can reduce the height of the material adding and taking operation position, reduce the difficulty of operation, improve work efficiency and safety, and thus increase the production capacity to about 20 times the output of a traditional three-dimensional kiln.

[0017] The titanium hydride production system of the present invention significantly increases the loading capacity and doubles the output by arranging a three-layer hopper and a plurality of detachably connected hopper units. Meanwhile, the detachability of the hopper units facilitates operators to add and remove materials and replace each unit individually.

[0018] The titanium hydride production system of the present invention is heated by a medium frequency induction coil instead of a radiation heating method of a three-dimensional kiln, which makes heating more uniform, promotes reaction efficiency and is more convenient for temperature control. The titanium hydride production system of the present invention also achieves safe cooling and water resource conservation through a shower system and a cold water circulation system.

[0019] The present invention also adopts a titanium hydride production system to simultaneously prepare titanium hydride using a first transverse reaction chamber, a second transverse reaction chamber, a third transverse reaction chamber and a fourth transverse reaction chamber. Each transverse reaction chamber is connected to a transverse reaction chamber fixed area or a transmission mechanism and circulates in the production system. Compared with traditional foreign three-dimensional kilns, the power consumption for producing each kilogram of titanium hydride is reduced by nearly 1 / 3, solving the problem of high-throughput mass production in the field of titanium hydride. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of a titanium hydride production system in Example 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the horizontal reaction chamber in Example 1 of the present invention; In the figure, 1- horizontal reaction chamber; 2- transmission mechanism; 3- material taking unit; 4- hydrogen injection pressure transformation unit; 5- reaction unit; 6- cooling unit; 11- chamber body; 12- chamber cover; 13- air inlet valve; 14- air outlet valve; 15- pressure gauge; 16- slide rail; 17- hopper; 171- hopper unit; 172- upper hopper; 173 lower hopper. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below through specific embodiments and drawings. It should be understood that the described embodiments are only used to explain the present invention, but not to limit the present invention.

[0023] Example 1 A titanium hydride production system In this embodiment, Figure 1 , including four transverse reaction chambers 1 equipped with hoppers, a transmission mechanism 2, and a material taking unit 3, a hydrogen injection pressure transformation unit 4, a reaction unit 5, and a cooling unit 6 connected in sequence; each unit is connected end to end through a transmission mechanism 2 including a conveyor belt, enclosing a rectangular working area with a length of 60m and a width of 30m; Among them, the feeding and taking unit is fixed with a feeding and taking mechanism and a first horizontal reaction bin fixed area; the feeding and taking mechanism is used to feed or take materials into the hopper; the hydrogen injection and pressure transformation unit is fixed with a first heating mechanism including a medium frequency induction coil matching the shape of the bin body, a gas pipeline and a second horizontal reaction bin fixed area; the reaction unit is fixed with a second heating mechanism including a medium frequency induction coil matching the shape of the bin body, a gas pipeline and a third horizontal reaction bin fixed area; the cooling unit is fixed with a shower cooling mechanism including a shower system and a cold water circulation system and a fourth horizontal reaction bin fixed area; wherein the water temperature of the cold water circulation system is not lower than 30°C to prevent a sudden drop in temperature.

[0024] The transverse reaction chamber 1 is detachably connected to the transverse reaction chamber fixing area and is sequentially transferred between the units through the transmission mechanism 2 .

[0025] Horizontal reaction chamber 1 Figure 2 , in the shape of a capsule, comprising a bin body 11 with a length of 2.2 m and a diameter of 1.2 m, a bin cover 12 located at both ends of the bin body and movably connected to the bin body, an air inlet valve 13, an air outlet valve 14 and a pressure gauge 15 fixed to the bin body, the inner side wall of the bin body 11 is fixed with two or more mutually parallel slide rails 16, and a hopper 17 matched with the slide rails can slide on the slide rails to enter and exit the horizontal reaction bin, and the two slide rails on the horizontal plane constitute a group of slide rails, and a total of three groups ( Six) slide rails, and the hopper matched with each set of slide rails is composed of five dustpan-shaped hopper units 171 with a accommodating cavity that can be loaded separately and screwed together. The hopper units of the upper hopper 172 and the lower hopper 173 are of the same size, which is 0.85m wide, 0.4m long, and 0.07m high. The middle hopper 174 is close to the center of the inner cavity of the silo body, so its width is closer to the diameter of the silo body. The hopper unit of the middle hopper is 1.05m wide, 0.4m long, and 0.07m high.

[0026] The bin covers at both ends of the horizontal reaction bin 1 of the present invention can be opened for discharging and adding materials, and sealing strips are arranged inside the covers, so the airtight effect is good.

[0027] In other embodiments, the cold water circulation system is provided with a water reservoir, a steel wire rope and a pulley block, and cooling is achieved by hoisting the horizontal reaction chamber into the water reservoir.

[0028] Example 2 Method for preparing titanium hydride using a titanium hydride production system This embodiment is a method for preparing titanium hydride using Example 1, which is as follows: Open the cover of the first transverse reaction bin, take out its hopper, use the feeding and taking mechanism to load titanium powder into the hopper, close the cover, and transfer the first transverse reaction bin from the first transverse reaction bin fixed area to the second transverse reaction bin fixed area via the transmission mechanism; start the medium frequency induction coil, use the first heating mechanism to heat to 200°C, evaporate the water in the titanium powder raw material in the bin, and discharge the air in the bin, evacuate to a negative pressure state through the gas pipeline, and then fill with hydrogen to a pressure of 3000Pa, transfer the first transverse reaction bin to the third transverse reaction bin fixed area via the transmission mechanism, use the second heating mechanism to gradually increase the temperature to 600°C at intervals of 50°C within 2 hours, so that the outer wall of the reaction bin is slightly red, and keep it for 2 hours until the reaction is completed, then move the first transverse reaction bin to the fourth transverse reaction bin fixed area and cool it to 30°C via the cooling mechanism, observe the pressure gauge at this time, and it shows that the pressure in the bin has not changed, transfer it to the first transverse reaction bin fixed area, extract the gas in the bin to a negative pressure state, take out the titanium hydride, and then load the titanium powder, and start the next cycle of cyclic transmission; After the previous transverse reaction bin leaves the transverse reaction bin fixing area, the next transverse reaction bin is taken to fill the position until the first transverse reaction bin, the second transverse reaction bin, the third transverse reaction bin and the fourth transverse reaction bin are all connected to the transverse reaction bin fixing area or the transmission mechanism, that is, in a pseudo-clockwise order, they are the first transverse reaction bin, the second transverse reaction bin, the third transverse reaction bin and the fourth transverse reaction bin, and the transverse reaction bin fixing areas are the first transverse reaction bin fixing area, the second transverse reaction bin fixing area, the third transverse reaction bin fixing area and the fourth transverse reaction bin fixing area in a clockwise order, specifically: When the production system starts to circulate, the first transverse reaction bin moves to the fourth transverse reaction bin fixed area, the fourth transverse reaction bin originally located in the fourth transverse reaction bin fixed area moves to the first transverse reaction bin fixed area, takes out the titanium hydride and then reloads the titanium powder, and then moves to the second transverse reaction bin fixed area, while the third transverse reaction bin originally located in the second transverse reaction bin fixed area moves to the third transverse reaction bin fixed area, and the second transverse reaction bin previously located in the third transverse reaction bin fixed area has been moved to the fourth transverse reaction bin fixed area after the first transverse reaction bin is moved away, and the cycle is repeated.

[0029] According to comparative experimental calculations, the above preparation method reduces the power consumption per kilogram of titanium hydride produced by nearly 1 / 3 compared with the traditional three-dimensional kiln with radiation heating, and increases the output by 20 times. In addition, the direct heating of the reaction chamber with a medium-frequency induction coil can directly heat the hydrogen and titanium powder in the chamber and quickly form a chemical reaction. The reaction time is shortened by about 2 hours compared with radiation heating, greatly improving production efficiency.

[0030] In other embodiments, hydrogen is filled to a pressure of 3500, 3600, 3895 and 4000 Pa, etc., within a range of 3000-4000 Pa, and transmitted to the fixed area of ​​the third transverse reaction chamber via a transmission mechanism. The second heating mechanism is used to increase the temperature to a temperature within a range of 500-600°C, such as 500, 550, 570 and 600°C within 2 hours and maintain the temperature for more than 2 hours until the reaction is completed, thereby achieving high-capacity preparation of titanium hydride.

[0031] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A titanium hydride production system, characterized in that: It includes a transverse reaction chamber equipped with a hopper, a transmission mechanism, and a material taking unit, a hydrogen injection pressure changing unit, a reaction unit and a cooling unit connected in sequence; each unit is connected end to end through the transmission mechanism; The transverse reaction chamber is sequentially transferred between the units through a transmission mechanism; The transverse reaction bin includes a bin body, bin covers located at both ends of the bin body and movably connected to the bin body, inlet and outlet air valves and a pressure gauge fixed to the bin body, and the inner side wall of the bin body is fixed with more than two parallel slide rails, and the hopper cooperating with the slide rails can slide on the slide rails to enter and exit the transverse reaction bin.

2. A titanium hydride production system according to claim 1, characterized in that: The feeding and taking unit is provided with a feeding and taking mechanism and a first transverse reaction bin fixing area; the feeding and taking mechanism is used to feed or take materials into the hopper; The hydrogen injection pressure transformation unit is provided with a first heating mechanism, a gas pipeline, and a second transverse reaction chamber fixing area; The reaction unit is provided with a second heating mechanism, a gas pipeline and a third transverse reaction chamber fixing area; The cooling unit is provided with a cooling mechanism and a fourth transverse reaction chamber fixing area; The transverse reaction chamber is detachably connected to the transverse reaction chamber fixing area.

3. A titanium hydride production system according to claim 2, characterized in that: The two slide rails located on a horizontal plane form a group of slide rails, and each group of slide rails has a hopper matched therewith.

4. A titanium hydride production system according to claim 3, characterized in that: There are three groups of slide rails, which are used to install the upper hopper, the middle hopper and the lower hopper respectively. Each hopper is composed of a number of detachably connected hopper units; the hopper unit has a accommodating cavity and can be loaded separately.

5. A titanium hydride production system according to claim 4, characterized in that: The heating mechanism contains a medium frequency induction coil that matches the shape of the warehouse body.

6. A titanium hydride production system according to any one of claims 2 to 5, characterized in that: The cooling mechanism is a shower cooling mechanism.

7. A titanium hydride production system according to claim 6, characterized in that: The shower cooling mechanism comprises a shower system and a cold water circulation system.

8. A method for preparing titanium hydride, characterized in that: Titanium hydride is prepared using a titanium hydride production system as described in any one of claims 2 to 7, wherein the transverse reaction chamber includes a first transverse reaction chamber, a second transverse reaction chamber, a third transverse reaction chamber and a fourth transverse reaction chamber, which are circulated in the production system by a transmission mechanism.

9. The method for preparing titanium hydride according to claim 8, characterized in that: Open the bin cover, take out the hopper of the first transverse reaction bin, use the feeding and taking mechanism to load the titanium powder into the hopper, close the bin cover, and transfer the first transverse reaction bin from the first transverse reaction bin fixed area to the second transverse reaction bin fixed area via the transmission mechanism; heat to 200°C using the first heating mechanism, evacuate to a negative pressure state through the gas pipeline, fill with hydrogen to a pressure of 3000-4000Pa, and transfer to the third transverse reaction bin fixed area via the transmission mechanism, and use the second heating mechanism to increase the temperature to 500-600°C within 2 hours and maintain for more than 2 hours until the reaction is completed, then move the first transverse reaction bin to the fourth transverse reaction bin fixed area, cool it down to a constant pressure through the cooling mechanism, and transfer it to the first transverse reaction bin fixed area, after exhausting, take out the titanium hydride and then load the titanium powder, and start the next cycle of cyclic transmission; After the previous transverse reaction bin leaves the transverse reaction bin fixing area, the next transverse reaction bin is taken to fill its place until the first transverse reaction bin, the second transverse reaction bin, the third transverse reaction bin and the fourth transverse reaction bin are all connected to the transverse reaction bin fixing area or the transmission mechanism.

10. The method for preparing titanium hydride according to claim 9, characterized in that: In the titanium hydride production system, each unit and the transmission mechanism enclose a rectangle with a length of 60m and a width of 30m.

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