Molybdenum powder raw material mixing device for preparing molybdenum blank

Abstract

The molybdenum powder raw material mixing device comprises a mixing container, a stirring cavity is formed in the mixing container, a stirring mechanism is arranged in the stirring cavity, and a driving motor is connected with the stirring mechanism and used for driving the stirring mechanism to rotate. The stirring mechanism comprises a main shaft and stirring paddle assemblies, the main shaft is vertically arranged in the center of the stirring cavity, the stirring paddle assemblies are distributed in the axial direction and the circumferential direction of the main shaft, the stirring mechanism is fixedly connected with the main shaft, and the spiral directions of the adjacent stirring paddle assemblies are opposite. Compared with the prior art, relative movement between materials is increased, the phenomenon of material agglomeration is effectively broken through, the mixing efficiency and uniformity are improved, the guide plates arranged inside can guide molybdenum powder to flow according to a preset path, dead angle areas are reduced, it is ensured that all the materials can be fully stirred and mixed, and the problem that local materials are not fully mixed is solved.

Description

Technical Field

[0001] This application relates to the field of molybdenum powder mixing technology, specifically to a molybdenum powder raw material mixing device for preparing molybdenum billets. Background Technology

[0002] Molybdenum and its alloys are widely used in high-tech fields such as aerospace, electronics, and defense due to their excellent physicochemical properties, such as high melting point, good high-temperature strength, low coefficient of thermal expansion, and good electrical and thermal conductivity. In the production of molybdenum products, the preparation and mixing of molybdenum powder are key process steps that directly affect the performance and quality of the final product.

[0003] Traditional mixing equipment, through simple rotation or tumbling mechanisms, may fail to break up material agglomerations, especially for powders with significant density differences. It cannot generate sufficient relative motion between the materials, leading to uneven mixing. Secondly, fine particulate materials such as molybdenum powder, due to their large specific surface area, are prone to electrostatic adsorption or agglomeration, making them difficult to disperse without sufficient external force, thus affecting mixing uniformity. Furthermore, molybdenum powder is sensitive to oxygen; prolonged exposure to air can cause surface oxidation, forming molybdenum oxide, which affects subsequent processing performance and the quality of the final product. Summary of the Invention

[0004] The technical problem to be solved by this application is to overcome the existing defects and provide a molybdenum powder raw material mixing device for preparing molybdenum billets, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a molybdenum powder raw material mixing device for preparing molybdenum billets, comprising a mixing container with a stirring chamber inside, a stirring mechanism disposed in the stirring chamber, a drive motor connected to the stirring mechanism for driving the stirring mechanism to rotate, the stirring mechanism comprising a main shaft vertically disposed at the center of the stirring chamber and stirring paddle assemblies distributed along the axial direction of the main shaft and fixedly connected to the main shaft, and the spiral directions of adjacent stirring paddle assemblies being opposite, and a guide plate disposed inside the mixing container.

[0006] As a preferred technical solution of this application, the top of the mixing container is provided with a feed inlet for feeding molybdenum powder raw material into the stirring chamber.

[0007] As a preferred technical solution of this application, the bottom of the mixing container is provided with an outlet for discharging the mixed molybdenum powder raw material.

[0008] As a preferred embodiment of this application, the mixing container is further connected to a gas protection system for introducing inert gas into the stirring chamber.

[0009] As a preferred technical solution of this application, the gas protection system includes an inert gas source and a gas delivery pipeline, connecting the inert gas source and the mixing container, and a gas distributor is disposed at the bottom of the mixing container to uniformly distribute the inert gas into the stirring chamber.

[0010] As a preferred technical solution of this application, the inner wall of the stirring chamber is provided with a wear-resistant lining.

[0011] As a preferred technical solution of this application, a heating device is also provided on the inner wall of the mixing container.

[0012] As a preferred technical solution of this application, the top of the mixing container is provided with an observation window for observing the mixing situation inside the stirring chamber.

[0013] Compared with existing technologies, this application employs a spiral-shaped stirring paddle assembly with adjacent blades spiraling in opposite directions. This increases the relative motion between materials, effectively breaking up material agglomeration and improving mixing efficiency and uniformity. The internal guide vanes guide the molybdenum powder along a predetermined path, reducing dead zones and ensuring all materials are thoroughly stirred and mixed, avoiding the problem of incomplete mixing in certain areas. The gas protection system effectively isolates oxygen from the air by introducing inert gas into the stirring chamber, preventing oxidation of the molybdenum powder during mixing. This not only ensures the purity of the molybdenum powder but also improves the quality of the final product. The entire mixing process takes place in a closed space, further reducing the impact of external impurities and oxygen on the molybdenum powder. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this application;

[0015] Figure 2 This is the main view of this application;

[0016] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA.

[0017] In the figure: 1 Mixing container, 11 Stirring chamber, 2 Stirring mechanism, 21 Main shaft, 22 Stirring paddle assembly, 3 Drive motor, 4 Feed inlet, 5 Discharge outlet, 6 Gas protection system, 61 Inert gas source, 62 Gas conveying pipeline, 7 Baffle plate, 8 Heating device, 9 Observation window. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application (for ease of description and understanding, hereinafter referred to as...), Figure 2 (The above is described above). All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0019] Please see Figure 1-3 This application provides a technical solution: a molybdenum powder raw material mixing device for preparing molybdenum billets, comprising a mixing container 1, a stirring chamber 11 therein, a stirring mechanism 2 disposed within the stirring chamber 11, and a drive motor 3 connected to the stirring mechanism 2 for driving the stirring mechanism 2 to rotate.

[0020] The mixing container 1 provides a closed space for the molybdenum powder raw material to be mixed. The sealed space can prevent oxidation. The stirring mechanism 2 is directly responsible for mixing the molybdenum powder raw material, improving the relative movement between materials and enhancing the mixing effect.

[0021] The molybdenum powder raw material is fed into the stirring chamber 11 of the mixing container 1. The drive motor 3 is started, which drives the main shaft 21 and the stirring paddle assembly 22 in the stirring mechanism 2 to rotate, and the molybdenum powder raw material is mixed. The speed of the drive motor 3 can be adjusted according to actual needs to achieve the best mixing effect.

[0022] The stirring mechanism 2 includes a main shaft 21 vertically arranged at the center of the stirring chamber 11 and stirring paddle assemblies 22 distributed along the axial direction of the main shaft 21 and fixedly connected to the main shaft 21. The blades of the stirring paddle assembly 22 have a helical structure, and the helical directions of adjacent stirring paddle assemblies 22 are opposite.

[0023] The main shaft 21 is vertically set at the center of the mixing chamber 11. It serves as the basic support structure for the entire mixing mechanism 2, bearing the weight of all the mixing paddle assemblies 22. It is also connected to the drive motor 3 via a coupling to receive rotational power and drive the mixing paddle assemblies 22 to rotate.

[0024] The stirring paddle assembly 22 is fixedly connected to the main shaft 21. The stirring paddle assembly 22 is the part that directly contacts the molybdenum powder raw material and performs the mixing task. Its blades can effectively promote the flow of materials and achieve a more uniform mixing effect.

[0025] The opposite spiral directions of adjacent mixing paddle assemblies 22 can increase the relative motion between materials, which helps to break up possible material agglomeration and further improve mixing efficiency and uniformity.

[0026] This structure is existing technology and is mostly used in aircraft propellers and submarine propellers, so it will not be described in detail in this application.

[0027] The mixing container 1 is also equipped with a flow guide plate 7.

[0028] The guide plate 7 can guide the molybdenum powder raw material to flow along a predetermined path, reduce the existence of dead zones, and ensure that all materials can be fully stirred and mixed.

[0029] By changing the flow direction of the materials, the guide plate 7 can increase the relative motion between the materials, thereby improving the uniformity and efficiency of mixing. When used in conjunction with the agitator assembly 22, it further prevents material accumulation, making the material distribution more uniform and avoiding the problem of incomplete mixing in certain areas.

[0030] The properly arranged guide vanes 7 can also reduce the workload of the mixing mechanism 2, reduce energy consumption, and extend the service life of the equipment.

[0031] Furthermore, the top of the mixing container 1 is provided with a feed inlet 4, which is used to feed molybdenum powder raw material into the stirring chamber 11.

[0032] The feed inlet 4 is located at the top of the mixing container 1, providing the operator with a convenient and safe entry point to add molybdenum powder raw material into the mixing chamber 11.

[0033] Operators can easily feed molybdenum powder into the mixing chamber 11 through the feed inlet 4 without opening the entire mixing container 1, simplifying the operation process.

[0034] The feed inlet 4 is equipped with a cover plate at its end to prevent contamination from external materials. Furthermore, there are two feed inlets 4, located on both sides of the mixing container 1. Molybdenum powder is added to one side, and other elemental materials are added to the other side.

[0035] Furthermore, the bottom of the mixing container 1 is provided with an outlet 5 for discharging the mixed molybdenum powder raw material.

[0036] The discharge port 5 is used to discharge the molybdenum powder raw material after it has been mixed. The discharge port 5 and the stirring chamber 11 are connected by a manual opening and closing mechanism. By opening and closing the mechanism, the material can be discharged from the stirring chamber 11.

[0037] Since the discharge port 5 is located at the bottom of the mixing container 1, it is beneficial to use gravity to help the molybdenum powder raw material flow out smoothly, ensuring that the mixed material can be completely and thoroughly discharged.

[0038] The discharge port 5 adopts a conical design, which guides the molybdenum powder raw material to flow out in one place, making it easier for the material to be collected into the designated container. Compared with the straight cylindrical design, the conical structure reduces the possibility of material residue and allows for more precise control over the position and direction of material discharge.

[0039] The conical outlet helps to accelerate the flow of materials using gravity, especially for powder materials with poor flowability. This design can effectively avoid clogging and ensure a smoother and more efficient discharge process.

[0040] The conical design minimizes material buildup and residue around the discharge port 4, ensuring the cleanliness of the equipment interior after each discharge, which is beneficial for subsequent cleaning and maintenance.

[0041] Furthermore, the mixing container 1 is also connected to a gas protection system 6 for introducing inert gas into the stirring chamber 11.

[0042] The gas protection system 6 introduces an inert gas (such as argon or nitrogen) into the stirring chamber 11 to provide a protective environment during the mixing process of molybdenum powder raw materials. Since molybdenum powder is prone to react with oxygen in the air to form molybdenum oxide, which affects the quality of the final product, the introduction of inert gas can effectively isolate oxygen in the air and prevent the oxidation of molybdenum powder.

[0043] Furthermore, the gas protection system 6 includes an inert gas source 61 and a gas delivery pipe 62. The gas delivery pipe 62 connects the inert gas source 61 and the mixing container 1. A gas distributor 63 is disposed at the bottom of the mixing container 1 to distribute the inert gas evenly into the mixing container 1.

[0044] Furthermore, the inner wall of the stirring chamber 11 is provided with a wear-resistant lining.

[0045] The molybdenum powder raw material will cause some wear to the inner wall of the mixing chamber 11 during the mixing process. By setting a wear-resistant lining on the inner wall, the damage to the equipment itself can be reduced, thereby extending the service life of the entire mixing device.

[0046] Wear on the inner wall can lead to increased surface roughness, which in turn affects the flowability and mixing effect of materials. A wear-resistant lining can maintain the smoothness and flatness of the inner wall for a long time, ensuring good mixing efficiency and product quality even under long-term use.

[0047] Furthermore, a heating device 8 is disposed on the inner wall of the mixing container 1.

[0048] Heating device 8 provides the necessary temperature control for the mixing process of molybdenum powder raw materials, ensuring that the molybdenum powder raw materials are mixed at the most suitable temperature.

[0049] Furthermore, the top of the mixing container 1 is provided with an observation window 9 for observing the mixing situation inside the stirring chamber 11.

[0050] Through the observation window 9, the operator can monitor the mixing status of the molybdenum powder raw material in the mixing chamber 11 in real time, including the material's flowability, uniformity, and whether there is any clumping.

[0051] In use: Activate the gas protection system 6, and introduce inert gas into the mixing chamber 11 through the gas delivery pipe 62 via the inert gas source 61 until the air in the chamber is completely replaced. Open the cover of the feed port 4, and add molybdenum powder and other elemental materials from the feed ports 4 on both sides according to the formula requirements. Ensure even feeding to prevent uneven mixing caused by adding too much at once. Set the target temperature of the heating device 8 according to the production process requirements and activate the heating device 8 to achieve the preset temperature conditions, ensuring that the molybdenum powder raw materials are mixed at the most suitable temperature. Start the drive motor 3 to rotate the main shaft 21 and the stirring paddle assembly 22 in the stirring mechanism 2, beginning the mixing operation of the molybdenum powder raw materials. Adjust the speed of the drive motor 3 as needed to optimize the mixing effect. Monitor the mixing situation in the mixing chamber 11 in real time through the observation window 9 to ensure good material flowability and uniform mixing. If any abnormalities are found (such as clumping or uneven mixing), adjust the process parameters promptly. After the mixing process is complete, turn off the drive motor 3 to stop stirring, open the discharge port 5, and utilize the advantage of the conical design to guide the molybdenum powder raw materials to flow out in a concentrated manner for easy collection into a designated container.

[0052] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A molybdenum powder raw material mixing device for preparing molybdenum billets, comprising a mixing container (1) having a stirring chamber (11) therein, a stirring mechanism (2) disposed in the stirring chamber (11), and a drive motor (3) connected to the stirring mechanism (2) for driving the stirring mechanism (2) to rotate, characterized in that; The stirring mechanism (2) comprises a main shaft (21) vertically arranged at the center of the stirring cavity (11) and stirring paddle assemblies (22) distributed along the axial and circumferential direction of the main shaft (21) and fixedly connected with the main shaft (21), and the adjacent stirring paddle assemblies (22) are opposite in spiral direction, and the mixing container (1) is further provided with a flow guide plate (7) inside.

2. The molybdenum powder raw material mixing device for preparing molybdenum billets according to claim 1, characterized in that: The top of the mixing container (1) is provided with a feeding port (4) for feeding molybdenum powder raw materials into the stirring cavity (11).

3. The apparatus for mixing raw material of molybdenum powder for preparing molybdenum billet according to claim 2, wherein: The bottom of the mixing container (1) is provided with a discharge port (5) for discharging the mixed molybdenum powder raw materials.

4. The molybdenum powder raw material mixing device for preparing molybdenum billets according to claim 3, characterized in that: The mixing container (1) is further connected with a gas protection system (6) for introducing inert gas into the stirring cavity (11).

5. The apparatus for mixing raw material of molybdenum powder for preparing molybdenum billet according to claim 4, wherein: The gas protection system (6) comprises an inert gas source (61) and a gas delivery pipeline (62) connecting the inert gas source (61) and the mixing container (1), and a gas distributor (63) is arranged at the bottom of the mixing container (1) for uniformly distributing the inert gas into the stirring cavity (11).

6. The apparatus for mixing raw material of molybdenum powder for preparing molybdenum billet according to claim 1, wherein: The inner wall of the stirring cavity (11) is provided with a wear-resistant lining.

7. The apparatus for mixing raw material of molybdenum powder for preparing molybdenum billet according to claim 1, wherein: A heating device (8) is further arranged on the inner wall of the mixing container (1).

8. The apparatus for mixing raw material of molybdenum powder for preparing molybdenum billet according to any one of claims 1 to 7, wherein: The top of the mixing container (1) is provided with an observation window (9) for observing the mixing condition in the stirring cavity (11).

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