Inflammable metal particle impurity removal device and method

Abstract

The invention discloses a flammable metal particle impurity removal device and method.The flammable metal particle impurity removal device comprises a screen shoe assembly, a water tank, a supporting frame and a driving assembly.The screen shoe assembly comprises a net rack, a first screen layer structure and a second screen layer structure, and the net rack is movably connected with the water tank; the first screen layer structure and the second screen layer structure are sequentially arranged on the net rack at intervals in the height direction, the first screen layer structure and the second screen layer structure are suspended in the water tank, the water tank and the driving assembly are arranged on the supporting frame, the driving assembly is connected with the net rack, and the supporting frame is connected with the water tank. And the motor is used for driving the net rack to do reciprocating motion relative to the water tank and enabling the first screen layer structure and the second screen layer structure to swing in the water tank. The risk of static fire caused by screening friction of flammable metal is reduced, meanwhile, the liquid can help to clean electrolyte and dust impurities on metal particles, and the cleaning effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of flammable metal screening, and in particular to a flammable metal particle impurity removal device and method. Background Art

[0002] In the production process of vanadium, titanium, zirconium and other high-purity metals, the metal to be purified is used as the anode and the high-purity metal as the cathode. Halogen salt is added as the electrolyte, and direct current is passed for electrolytic purification. The crude metal at the anode is continuously dissolved and crystallized and precipitated at the cathode. The impurity elements are suspended or precipitated in the molten pool. When the electrolysis is completed and the cathode product is taken out, the surface of the cathode product is irregular dendritic crystals, and a lot of molten salt is mixed inside. In order to improve the product quality, the product needs to be cleaned. Secondly, according to the analysis of the product, the finer the particles, the higher the impurity rate of the product, so the product needs to be graded by size. However, due to the characteristics of metal particles, dry screening is prone to electrostatic ignition due to friction between metals, resulting in combustion of metal particles, and for particularly small metal powders (<0.5mm), they are easily adsorbed on the surface of large crystalline metals in both dry and wet conditions, making it difficult to ensure the cleanliness of product screening.

[0003] Commonly used cleaning screens are drum screens and linear screens. The core working principle is to install a spray pipe directly above the screen to flush the ore that is constantly rolling on the screen, thereby achieving the effect of cleaning and separation. However, the cleaning quality is poor, and it is often used to remove sludge and other impurities on the surface of the ore. For specific operating conditions, when screening flammable metal powders, especially when it is necessary to screen products with smaller particle sizes (particle size less than 10mm) and there are high requirements for screening and cleaning accuracy (particle impurities <0.5mm need to be removed), fine metal dust particles are easily adsorbed on the surface of large particles. Conventional cleaning screens often cannot meet the use requirements, and the friction between metal particles generates static electricity ignition, causing the product to burn. Summary of the invention

[0004] The technical problem to be solved by the present invention is that small metal dust particles are easily adsorbed on the surface of large particles, conventional cleaning screens often cannot meet the needs of dissolving and diluting electrolytes and screening small metal dust, and the friction between metal particles generates static electricity ignition, causing product combustion.

[0005] In order to solve the above technical problems, the present invention provides a combustible metal particle removal device, including a screen frame assembly, a water trough, a support frame and a drive assembly, the screen frame assembly including a grid frame, a first screen layer structure and a second screen layer structure, the grid frame is movably connected to the water trough, the first screen layer structure and the second screen layer structure are arranged on the grid frame in sequence along the height direction, and the first screen layer structure and the second screen layer structure are suspended in the water trough, the water trough and the drive assembly are arranged on the support frame, and the drive assembly is connected to the grid frame to drive the grid frame to reciprocate relative to the water trough and make the first screen layer structure and the second screen layer structure swing in the water trough.

[0006] Furthermore, the grid includes a frame body, a first support part and a second support part, the inner wall of the frame body is movably connected to both sides of the water tank, the first support part and the second support part are installed on the frame body in sequence, the first screen layer structure is installed on the first support part, and the second screen layer structure is installed on the second support part.

[0007] Further, the first screen layer structure includes a first screen, a first frame and a first mounting member, the first screen is laid on the first frame and connected to the first frame through the first mounting member;

[0008] The second screen layer structure includes a second screen, a second frame and a second mounting member. The second screen is laid on the second frame and connected to the second frame via the second mounting member.

[0009] Furthermore, the mesh size of the first sieve is 5-10 mm; the mesh size of the second sieve is 0.5-2 mm.

[0010] Furthermore, pulley grooves are provided on both sides of the water tank; the outer wall of the frame is connected with a pulley, and the pulley is installed in the pulley grooves.

[0011] Furthermore, the driving assembly includes a driving member, an eccentric wheel and a rocker, the eccentric wheel is mounted on the supporting frame, one end of the rocker is connected to the frame, the other end of the rocker is connected to the eccentric wheel, and the driving member is connected to the eccentric wheel.

[0012] Furthermore, it also includes a drain valve, which is arranged on one side of the water tank.

[0013] Furthermore, the bottom of the water tank is inclined toward the drain valve.

[0014] Furthermore, the inclination angle of the bottom of the water tank is 2-4°.

[0015] The present invention also provides a method for removing impurities from combustible metal particles, which is applied to the combustible metal particle removal device as described above, and the method comprises the following steps:

[0016] Crush the cathode products and return the broken materials that do not meet the specifications;

[0017] The crushed materials that meet the specifications are soaked in clean water for screening and cleaning to dissolve and discharge the attached halogen salts, and the first sieve material is collected;

[0018] The first screened material is screened and cleaned for the second time in clean water to dissolve the attached halide salts in water and discharge them, and the second screened material and impurities are collected.

[0019] Compared with the prior art, the device and method for removing impurities from combustible metal particles according to the embodiment of the present invention have the following beneficial effects:

[0020] In the embodiment of the present invention, when metal particles enter the first screen layer structure in the water tank, water molecules have good conductivity and polarity in the liquid environment, and can quickly become a "discharge channel" for static electricity, thereby reducing or eliminating static electricity on the surface of the metal particles, greatly reducing the risk of static electricity fire caused by friction. At the same time, after the electrostatic adsorption of metal dust is eliminated by the liquid, the liquid can help clean the fine impurities on the metal particles, thereby improving the cleaning effect. The first screen layer structure and the second screen layer structure of this embodiment allow the metal particles to undergo two screening processes. The mesh of the first screen layer structure is larger, which is used to remove impurities of larger particles; the mesh of the second screen layer structure is smaller, which removes fine impurities and ensures that the metal particles are thoroughly cleaned and accurately screened. In addition, the drive assembly is connected to the grid frame to make it reciprocate relative to the water tank, which helps the metal particles to be evenly distributed on the screen layer and increases the contact opportunities between the metal particles and the screen, thereby improving the screening efficiency. At the same time, the reciprocating motion can also promote the flow of the cleaning liquid, further enhancing the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a front view of a combustible metal particle removal device provided in an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of the working state of the combustible metal particle removal device provided by an embodiment of the present invention;

[0023] Figure 3 is a side view of a combustible metal particle removal device provided by an embodiment of the present invention;

[0024] Figure 4 is a front view of a screen frame assembly provided by an embodiment of the present invention;

[0025] Figure 5 is a side view of a screen frame assembly provided by an embodiment of the present invention;

[0026] Figure 6 It is a front view of a water tank, a support frame and a driving assembly provided by an embodiment of the present invention;

[0027] Figure 7 is a side view of a water tank, a support frame and a drive assembly provided by an embodiment of the present invention;

[0028] In the figure, 1. screen frame assembly; 11. mesh frame; 111. frame body; 112. first support part; 113. second support part; 12. first screen layer structure; 121. first layer frame; 122. first mounting member; 13. second screen layer structure; 131. second layer frame; 132. second mounting member; 14. pulley; 2. water tank; 21. pulley groove; 3. support frame; 4. drive assembly; 41. drive member; 42. eccentric wheel; 43. rocker; 5. drain valve. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] like Figures 1 to 3 As shown, the present invention provides a device for removing impurities from flammable metal particles, which is mainly used for crushing and decomposing cathode products into products with small particles of less than 10 mm for impurity removal. The device for removing impurities from flammable metal particles comprises a screen frame assembly 1, a water trough 2, a support frame 3 and a drive assembly 4. The screen frame assembly 1 comprises a grid frame 11, a first screen layer structure 12 and a second screen layer structure 13. The grid frame 11 is movably connected to the water trough 2. The first screen layer structure 12 and the second screen layer structure 13 are arranged on the grid frame 11 in sequence along the height direction, and the first screen layer structure 12 and the second screen layer structure 13 are suspended in the water trough 2. The water trough 2 and the drive assembly 4 are arranged on the support frame 3, and the drive assembly 4 is connected to the grid frame 11 to drive the grid frame 11 to reciprocate relative to the water trough 2 and make the first screen layer structure 12 and the second screen layer structure 13 swing in the water trough 2.

[0031] The water tank 2 of this embodiment is used to hold clean water, provide a wet screening environment, and prevent metal particles from catching fire due to static electricity generated by friction. When metal particles enter the first screen layer structure 12 in the water tank 2, in a liquid environment, water molecules have good conductivity and polarity, and can quickly become a "discharge channel" for static electricity, thereby reducing or eliminating static electricity on the surface of metal particles, greatly reducing the risk of static electricity generated by friction. At the same time, after the electrostatic adsorption of metal dust is eliminated by the liquid, the liquid can help clean the fine impurities on the metal particles, thereby improving the cleaning effect. The first screen layer structure 12 and the second screen layer structure 13 of this embodiment allow the metal particles to undergo two screening processes. The mesh of the first screen layer structure 12 is larger, which is used to remove impurities of larger particles; the mesh of the second screen layer structure 13 is smaller, which removes fine impurities and ensures that the metal particles are thoroughly cleaned and accurately screened. In addition, the drive assembly 4 is connected to the grid frame 11 to make it reciprocate relative to the water tank 2, which helps the metal particles to be evenly distributed on the screen layer and increases the contact opportunity between the metal particles and the screen, thereby improving the screening efficiency. At the same time, the reciprocating motion can also promote the flow of cleaning fluid and further enhance the cleaning effect.

[0032] like Figure 4 As shown, the grid 11 includes a frame body 111, a first support portion 112 and a second support portion 113. The inner wall of the frame body 111 is movably connected to both sides of the water tank 2. The first support portion 112 and the second support portion 113 are installed on the frame body 111 in sequence. The first screen layer structure 12 is installed on the first support portion 112, and the second screen layer structure 13 is installed on the second support portion 113.

[0033] The inner wall of the frame 111 of this embodiment is movably connected to both sides of the water tank 2, allowing the grid 11 to reciprocate in the water tank 2, ensuring the freedom of movement of the grid 11, while maintaining the stability of the structure, and the driving assembly 4 connects the grid 11 to make it reciprocate in the water tank 2, so that the metal particles are evenly distributed on the screen layer, and the contact opportunity between the metal particles and the screen is increased, thereby improving the screening efficiency. When the grid 11 reciprocates in the water tank 2, the first screen layer structure 12 and the second screen layer structure 13 also swing accordingly. The metal particles are preliminarily screened on the first screen layer, and the larger particles of impurities are blocked on the first screen layer structure 12, while the smaller particles pass through the first screen layer to enter the next layer of screening, and the metal particles passing through the first screen layer are further screened on the second screen layer structure 13 as the second screen layer structure 13 swings, and the metal particles are blocked on the second screen layer structure 13, while the impurities are deposited at the bottom of the water tank 2 through the second screen layer structure 13.

[0034] Furthermore, the first screen structure 12 includes a first screen, a first frame 121 and a first mounting member 122. The first screen is laid on the first frame 121 and connected to the first frame 121 through the first mounting member 122. The first screen is used to remove larger impurities, such as large metal fragments, larger particles of non-metallic impurities, etc. The metal particles are first preliminarily screened through the first screen, and the larger impurities are blocked on the first screen, while the smaller particles pass through the first screen to enter the next level of screening;

[0035] The second screen layer structure 13 includes a second screen, a second frame 131 and a second mounting member 132. The second screen is laid on the second frame 131 and connected to the second frame 131 through the second mounting member 132. The second screen is used to remove fine impurities, such as fine metal particles, fine non-metallic impurities, etc., so that the metal particles passing through the first screen are further screened on the second screen, the metal particles are blocked on the second screen, and the impurities are deposited at the bottom of the water tank 2 through the second screen.

[0036] Preferably, the mesh size of the first sieve is 5-10 mm to effectively remove most of the larger impurities while allowing smaller metal particles to pass smoothly and enter the next step of fine screening; the mesh size of the second sieve is 0.5-2 mm to effectively remove fine impurities and ensure the cleanliness and purity of the final product.

[0037] like Figure 5 and Figure 7 As shown, pulley grooves 21 are opened on both sides of the water tank 2 for guiding and limiting the movement of the grid 11; the outer wall of the frame 111 is connected to the pulley 14, and the pulley 14 is installed in the pulley groove 21 to ensure that the grid 11 performs smooth reciprocating motion in the water tank 2.

[0038] The pulley groove 21 of this embodiment provides a fixed track for the pulley 14, ensuring that the movement path of the grid 11 in the water tank 2 is predetermined, preventing the grid 11 from shifting or getting stuck during movement. The pulley 14 is installed on the outer wall of the frame 111 and is used in conjunction with the pulley groove 21 to ensure that the grid 11 remains stable during movement and prevents shaking or tilting.

[0039] Read also Figure 6The driving assembly 4 includes a driving member 41, an eccentric wheel 42 and a rocker 43. The driving member 41 is the power source of the entire driving assembly 4. It is preferably a reduction motor that provides power to the entire system through rotational motion. The driving member 41 is connected to the eccentric wheel 42 to convert its rotational motion into reciprocating motion through the eccentric wheel 42. The eccentric wheel 42 is installed on the support frame 3, and its center is not concentric with the rotation axis. When the output shaft of the driving member 41 rotates, the edge of the eccentric wheel 42 will make a circular motion around an eccentric point. One end of the rocker 43 is connected to the frame 111, and the other end of the rocker 43 is connected to the eccentric wheel 42. The above-mentioned eccentric motion is transmitted to the frame 111 through the rocker 43, so that the frame 111 reciprocates in the water tank 2.

[0040] That is, after the driving member 41 is started, its output shaft rotates and is transmitted to the eccentric wheel 42 through the transmission mechanism. The eccentric wheel 42 rotates, and the eccentric point on its edge pushes one end of the rocker 43 to move up and down or left and right. Since the other end of the rocker 43 is connected to the frame 111, this movement will be transmitted to the frame 111, so that the frame 111 reciprocates in the water tank 2, driving the first screen layer structure 12 and the second screen layer structure 13 to swing in the water tank 2, so that the metal particles are evenly distributed on the screen layer, and the contact opportunity between the metal particles and the screen is increased, thereby improving the screening effect. In this embodiment, the rotation speed of the eccentric wheel 42 can be changed by adjusting the rotation speed of the driving member 41, thereby affecting the reciprocating frequency of the rocker 43. A higher reciprocating frequency can make the metal particles on the screen layer distribute and screen faster, thereby improving the overall screening efficiency.

[0041] Furthermore, it also includes a drain valve 5, which is arranged on one side of the water tank 2 and is used to control the discharge of liquid in the water tank 2. After the cleaning and screening process is completed, the drain valve 5 discharges the cleaning liquid in the water tank 2 for subsequent treatment or recycling. In addition, during the cleaning process, the drain valve 5 can be used to adjust the liquid level in the water tank 2 to ensure that the liquid level is appropriate, ensure that the metal particles are fully in contact with the screen layer, and avoid excessively high liquid levels affecting the screening effect.

[0042] Furthermore, the bottom of the water tank 2 is tilted toward the drain valve 5 so that the clean water naturally flows to the drain valve 5 under the action of gravity, ensuring that the liquid can be completely discharged and reducing residue. In addition, the tilted bottom can reduce the deposition of impurities at the bottom of the water tank 2, prevent blockage and corrosion, and extend the service life of the equipment. Preferably, the tilt angle of the bottom of the water tank 2 is 2-4°, so that the liquid flows more smoothly, ensuring that the cleaning liquid naturally flows to the drain valve 5 under the action of gravity, reducing the retention time of the liquid in the water tank 2, ensuring that the liquid can be completely discharged, and reducing residue.

[0043] The present invention also provides a method for removing impurities from combustible metal particles, which is applied to the combustible metal particle removal device as described above, and the method comprises the following steps:

[0044] S110, crushing the cathode product and returning the crushed materials that do not meet the specifications;

[0045] This step crushes the cathode product into crushed materials that meet the specifications, ensuring consistent particle size, which is convenient for subsequent screening and cleaning of the inner product surface. In addition, the crushed materials that do not meet the specifications are returned and crushed again to ensure that all crushed materials meet the specifications.

[0046] The cathode product can be crushed into crushed materials that meet the specifications by using a crusher, and then the particle size of the crushed materials can be checked by a screening device. The crushed materials that do not meet the specifications can be returned and crushed again until they meet the specifications. The crushed materials that meet the specifications can directly enter the cleaning and screening steps, thereby improving the efficiency of the entire process.

[0047] S120, soaking the crushed materials that meet the specifications in clean water for screening and cleaning to discharge the attached halogen salt, and collecting the first sieve material;

[0048] This step removes the halide salt attached to the scraps by soaking and screening, improves the cleanliness of the metal particles, and puts the scraps that meet the specifications into the water tank 2 and soaks them in clean water. Start the drive assembly 4 to make the grid 11 reciprocate in the water tank 2, driving the first screen layer structure 12 and the second screen layer structure 13 to swing in the water tank 2. The metal particles are evenly distributed on the screen layer and pass through the larger mesh under the vibration of the screen. Large impurities are blocked on the first screen, while smaller particles pass through the first screen to enter the next level of screening. The halide salt in the cleaning liquid is taken away by water and discharged through the drain valve 5. Through the initial screening and cleaning, most of the halide salt and larger impurities are removed, the initial cleanliness of the metal particles is improved, and the first screened material is collected.

[0049] It should be noted that before this step, the material needs to be laid on the first screen by about 1-3 cm. Pure water is added until the surface of the product is submerged by 2-3 cm, and the driving member 41 is started to drive the first screen for screening.

[0050] S130, performing secondary screening and washing on the first screened material in clean water to discharge the attached halide salt, and collecting the second screened material and impurities.

[0051] This step further removes the halide salt attached to the first screen material through secondary screening and cleaning to ensure the cleanliness of the metal particles. The first screen material is put into the water tank 2 again and soaked in clean water. The drive assembly 4 is started to make the grid 11 reciprocate in the water tank 2, driving the second screen layer structure 13 to swing in the water tank 2. The metal particles are evenly distributed on the second screen layer and pass through the smaller mesh under the vibration of the screen. The pure metal particles are blocked on the second screen, while the fine impurities pass through the second screen, and the halide salt in the cleaning liquid is taken away by the water and discharged through the drain valve 5. The second screen material and impurities are collected.

[0052] This embodiment reduces direct contact between metal particles through wet screening, thereby reducing the generation of static electricity. The presence of water also plays a role in fire prevention, ensuring the safety of operation. In addition, through crushing and return material processing, the particle size of all crushed materials is ensured to be consistent, which is convenient for subsequent screening and cleaning. The multi-stage design of primary and secondary screening and cleaning can effectively remove impurities of different sizes and ensure the cleanliness and purity of metal particles.

[0053] It should be noted that, in order to ensure an effective cleaning effect, each batch of products is cleaned and screened 2-5 times. After each batch of screening, let it stand for 5-10 minutes before opening the drain valve 5 to drain the water. Collect the first screened material of the first screen, remove the first screen, collect the second screened material of the second screen, remove the second screen, and clean the water tank 2.

[0054] In summary, the embodiments of the present invention provide a device and method for removing impurities from flammable metal particles, which can achieve high-precision screening of less than 0.5 mm, solve the problem of electrostatic adsorption of fine powder on the product, meet the strict requirements for cleaning and screening of small particle products, and improve the quality and purity of the product. At the same time, it overcomes the hidden danger of static electricity ignition and combustion of flammable metal powder during the screening process, improves the safety of operation, and can minimize the consumption of water resources and energy during the cleaning and screening process, meeting the requirements of environmental protection and sustainable development.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A device for removing impurities from combustible metal particles, characterized in that: The invention comprises a screen frame assembly, a water trough, a support frame and a driving assembly, wherein the screen frame assembly comprises a mesh frame, a first screen layer structure and a second screen layer structure, the mesh frame is movably connected to the water trough, the first screen layer structure and the second screen layer structure are arranged on the mesh frame in sequence along the height direction, and the first screen layer structure and the second screen layer structure are suspended in the water trough, the water trough and the driving assembly are arranged on the support frame, and the driving assembly is connected to the mesh frame to drive the mesh frame to reciprocate relative to the water trough and make the first screen layer structure and the second screen layer structure swing in the water trough.

2. The combustible metal particle removal device according to claim 1, characterized in that: The grid includes a frame body, a first support part and a second support part. The inner wall of the frame body is movably connected to both sides of the water tank. The first support part and the second support part are installed on the frame body in sequence. The first screen layer structure is installed on the first support part, and the second screen layer structure is installed on the second support part.

3. The combustible metal particle removal device according to claim 2, characterized in that: The first screen layer structure comprises a first screen, a first frame and a first mounting member, wherein the first screen is laid on the first frame and connected to the first frame via the first mounting member; The second screen layer structure includes a second screen, a second frame and a second mounting member. The second screen is laid on the second frame and connected to the second frame via the second mounting member.

4. The combustible metal particle removal device according to claim 3, characterized in that: The mesh size of the first sieve is 5-10 mm; the mesh size of the second sieve is 0.5-2 mm.

5. The combustible metal particle removal device according to claim 2, characterized in that: Pulley grooves are provided on both sides of the water tank; the outer wall of the frame is connected with a pulley, and the pulley is installed in the pulley grooves.

6. The combustible metal particle removal device according to claim 2, characterized in that: The driving assembly includes a driving member, an eccentric wheel and a rocker, the eccentric wheel is installed on the supporting frame, one end of the rocker is connected to the frame, the other end of the rocker is connected to the eccentric wheel, and the driving member is connected to the eccentric wheel.

7. The combustible metal particle removal device according to claim 1, characterized in that: It also includes a drain valve, which is arranged on one side of the water tank.

8. The combustible metal particle removal device according to claim 7, characterized in that: The bottom of the water tank is tilted toward the drain valve.

9. The combustible metal particle impurity removal device according to claim 8, characterized in that: The inclination angle of the bottom of the water tank is 2-4°.

10. A method for removing impurities from combustible metal particles, characterized in that: Applied to the combustible metal particle removal device as claimed in any one of claims 1 to 9, the method comprises the following steps: Crush the cathode products and return the broken materials that do not meet the specifications; The crushed materials that meet the specifications are soaked in clean water for screening and cleaning to discharge the attached brine, and the first screened material is collected; The first screened material is screened and cleaned for the second time in clean water to discharge the attached halide salt, and the second screened material and impurities are collected.

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