A liquid aluminum filtration device

Abstract

This utility model relates to the technical field of aluminum liquid filtration devices, specifically disclosing an aluminum liquid filtration device including a feed hopper and a filter barrel. A conveying pipe is fixedly connected between the feed hopper and the filter barrel. A coarse filtration unit, a medium filtration unit, and a fine filtration unit are fixedly connected inside the filter barrel. The coarse filtration unit is a metal wire mesh, the medium filtration unit is a porous ceramic filter plate, and the fine filtration unit is a nanofiber filter membrane. A stirring assembly is also provided inside the filter barrel. In this utility model, a composite filtration structure with three different filter media in the coarse filtration unit, medium filtration unit, and fine filtration unit is adopted, which can progressively filter impurities of different sizes in the aluminum liquid, greatly improving filtration efficiency and filtration effect.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum liquid filtration devices, and in particular to an aluminum liquid filtration device. Background Technology

[0002] In modern aluminum production, the purity of molten aluminum directly affects the quality and performance of the final aluminum products. Molten aluminum often contains various impurities, such as oxides and inclusions, which can lead to defects in aluminum products, such as porosity, cracks, and decreased mechanical properties. Therefore, molten aluminum filtration is a crucial step in the aluminum processing and production process.

[0003] Traditional aluminum molten metal filtration devices mainly include ceramic foam filters and glass fiber filters. Ceramic foam filters rely on their porous structure to intercept impurities in the aluminum molten metal. Although they have a certain filtration effect, they suffer from low filtration efficiency, easy clogging, and short service life. Glass fiber filters utilize the adsorption and interception properties of glass fibers to filter impurities, but their filtration effect on tiny impurities is poor. Utility Model Content

[0004] In view of the technical problem of poor filtration effect in the existing technology, this utility model provides an aluminum liquid filtration device.

[0005] The technical solution adopted by this utility model is: an aluminum liquid filtration device, including a feed hopper and a filter barrel, a conveying pipe is fixedly connected between the feed hopper and the filter barrel, a coarse filtration unit, a medium filtration unit and a fine filtration unit are fixedly connected inside the filter barrel, the coarse filtration unit is a metal wire mesh, the medium filtration unit is a porous ceramic filter plate, the fine filtration unit is a nanofiber filter membrane, and a stirring assembly is also provided inside the filter barrel.

[0006] The present invention is further configured such that the stirring assembly includes a motor fixedly connected to the bottom of the filter barrel and a stirring rod rotatably connected inside the filter barrel. Multiple sets of stirring blades are fixedly connected to the outside of the stirring rod. The stirring blades are respectively located above the coarse filtration unit, the medium filtration unit and the fine filtration unit. The output end of the motor is fixedly connected to the stirring rod.

[0007] A further feature of this invention is that a cleaning component is provided on the outside of the filter barrel.

[0008] A further feature of this invention is that the cleaning assembly includes an opening located outside the filter tank and a side cover detachably connected to the outside of the opening.

[0009] A further feature of this invention is that both ends of the side cover are fixedly connected to slide bars, and the side wall of the opening is provided with a slide groove, in which the slide bars are slidably connected.

[0010] A further feature of this invention is that a connecting plate is provided at the bottom of the filter barrel, and the connecting plate is fixedly connected to the side cover and the filter barrel by bolts.

[0011] A further feature of this invention is that the filter barrel is wrapped with thermal insulation material.

[0012] The beneficial effects of this invention are as follows: This invention employs a composite filtration structure with three stages of different filter media: a coarse filtration unit, a medium filtration unit, and a fine filtration unit. This allows for the gradual filtration of impurities of different sizes in the molten aluminum, significantly improving filtration efficiency and effectiveness. Compared to traditional single-media filtration devices, this design more effectively removes various impurities, ensuring the high purity of the molten aluminum. A stirring component is incorporated into the multi-stage composite filtration system, creating a complex flow pattern within the filtration chamber and enhancing the contact between impurities and the filter media. This dynamic stirring filtration method overcomes the limitations of traditional static filtration, improving filtration efficiency and helping to prevent clogging of the filter media, thus extending the service life of the filtration device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the filter barrel in this utility model;

[0015] Figure 3 This is a schematic diagram of the opening structure on the outside of the filter barrel in this utility model;

[0016] Figure 4 This is a cross-sectional structural diagram of the filter barrel in this utility model;

[0017] Figure 5 This is a schematic diagram of the side cover structure in this utility model.

[0018] The diagram is marked as follows:

[0019] 1. Feed hopper; 2. Filter barrel; 3. Side cover; 4. Connecting plate; 5. Motor; 6. Conveying pipe; 7. Coarse filtration unit; 8. Medium filtration unit; 9. Fine filtration unit; 10. Stirring rod; 11. Stirring blade; 12. Sliding strip; 13. Opening; 14. Slide groove. Detailed Implementation

[0020] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The following is in conjunction with the appendix Figure 1-5 The present invention will be further described below.

[0022] To address the problems existing in the background technology, this application proposes the following technical solution: an aluminum liquid filtration device, comprising a feed hopper 1 and a filter barrel 2, the filter barrel 2 being externally wrapped with heat-insulating material, a conveying pipe 6 fixedly connected between the feed hopper 1 and the filter barrel 2, and a coarse filtration unit 7, a medium filtration unit 8, and a fine filtration unit 9 fixedly connected inside the filter barrel, wherein the coarse filtration unit is a metal wire mesh, the medium filtration unit 8 is a porous ceramic filter plate, and the fine filtration unit 9 is a nanofiber filter membrane; a stirring assembly is also provided inside the filter barrel; during the aluminum product processing, inclusions in the aluminum liquid can seriously affect product quality, leading to... To prevent defects such as pores and cracks, the feed hopper 1 of this device adopts an inverted conical design with a polished inner wall and extremely smooth surface, which can effectively reduce the flow resistance of aluminum liquid and ensure that the aluminum liquid gathers and flows into the conveying pipe 6 at the fastest speed. The heat insulation material wrapped around the filter tank 2 is made of nano aerogel felt, which has a thermal conductivity of only 0.013W / (m·K), which can reduce the heat loss of aluminum liquid during the filtration process by more than 80%, keep the temperature fluctuation of aluminum liquid within ±5℃, effectively avoid the problem of increased viscosity and poor fluidity of aluminum liquid due to temperature drop, and ensure the smooth operation of the filtration process.

[0023] The coarse filtration unit features a high-strength stainless steel woven wire mesh with precisely controlled mesh sizes of 1-2mm. This allows for rapid interception of large impurities such as oxide fragments and refractory material debris, preventing clogging of subsequent filter layers and extending the overall filtration cycle. The porous ceramic filter plate in the medium filtration unit (8) boasts a unique three-dimensional mesh structure with a porosity of 45%-55% and an average pore size of 50-100μm. It achieves a removal rate of over 95% for minute inclusions with diameters of 0.1-1mm. Its excellent chemical stability ensures no chemical reaction occurs under high-temperature molten aluminum scouring, resulting in a service life of up to 2000 hours. The nanofiber filter membrane in the fine filtration unit (9) has pore sizes of only tens of nanometers, enabling the interception of ultrafine particles smaller than micrometers for ultimate purification of the molten aluminum.

[0024] In this embodiment, the stirring assembly includes a motor 5 fixedly connected to the bottom of the filter tank 2 and a stirring rod 10 rotatably connected inside the filter tank 2. Multiple sets of stirring blades 11 are fixedly connected to the outside of the stirring rod 10. The stirring blades 11 are located above the coarse filtration unit, the intermediate filtration unit 8, and the fine filtration unit 9, respectively. The output end of the motor 5 is fixedly connected to the stirring rod 10. The design of the stirring assembly completely changes the problem of low static filtration efficiency in traditional aluminum liquid filtration processes. The motor 5 is a high-temperature resistant, waterproof variable frequency motor 5, with power adjustable within the range of 0-5kW. It can flexibly adjust the stirring speed according to the aluminum liquid throughput and impurity content, with a speed range of 0-1500 r / min. The stirring rod 10 is made of high-strength alloy steel and strengthened by a special heat treatment process, maintaining good rigidity and fatigue resistance even in high-temperature aluminum liquid environments, ensuring stable operation over a long period. The multiple sets of stirring blades 11 adopt an inclined blade design, causing the aluminum liquid to form a complex flow state of spiral ascent and tumbling within the filter tank 2.

[0025] When the stirring blade 11 is positioned above the coarse filtration unit, the vortex generated by its high-speed rotation accelerates the aggregation of large particles of impurities onto the surface of the metal wire mesh, allowing them to be intercepted more quickly. Above the middle filtration unit 8, the stirring action promotes more uniform flow of the molten aluminum through the porous ceramic filter plate, preventing insufficient filtration due to excessively high local flow rates. Above the fine filtration unit 9, the micro-turbulence generated by the stirring blade 11 allows the nanofiber filter membrane to fully contact the molten aluminum, making it easier for ultrafine particles to be adsorbed and intercepted, further improving filtration accuracy. In addition, the operation of the stirring assembly can effectively prevent local solidification of the molten aluminum during the filtration process, ensuring continuous filtration.

[0026] In this embodiment, a cleaning assembly is provided on the outside of the filter barrel 2. The cleaning assembly includes an opening 13 on the outside of the filter barrel 2 and a detachable side cover 3 connected to the outside of the opening 13. Sliding strips 12 are fixedly connected to both ends of the side cover 3. A sliding groove 14 is provided on the side wall of the opening 13, and the sliding strip 12 is slidably connected in the sliding groove 14. A connecting plate 4 is provided at the bottom of the filter barrel 2, and the connecting plate 4 is fixedly connected to the side cover 3 and the filter barrel 2 by bolts. The cleaning assembly solves the problems of difficult impurity cleaning and time-consuming maintenance in traditional filtration devices. The sliding connection structure between the opening 13 and the side cover 3 uses a high-precision sliding groove 14 and sliding strip 12. The inner wall of the sliding groove 14 is precision machined with a surface roughness Ra≤0.8μm. The gap between the sliding strip 12 and the sliding groove 14 is controlled within ±0.05mm to ensure smooth sliding and good sealing of the side cover 3. The side cover 3 adopts a quick-release design; the operator only needs to loosen the bolts on the connecting plate 4 to easily pull out the side cover 3 along the sliding groove 14.

[0027] The bolted connection between the connecting plate 4 and the side cover 3 and filter barrel 2 uses high-strength stainless steel bolts, combined with high-temperature resistant sealing gaskets, ensuring a secure connection while effectively preventing aluminum molten metal leakage. During cleaning, operators can directly access the impurities intercepted on the surfaces of each filter unit and quickly clean them using specialized tools, preventing the accumulation of impurities over time from affecting the filtration effect.

[0028] The usage method of this embodiment is as follows:

[0029] At the start of the aluminum molten metal filtration process, the molten aluminum is poured into the feed hopper 1 via an external conveying device. The feed hopper 1 is inverted conical in shape, allowing the molten aluminum to smoothly converge to the bottom. Next, the molten aluminum flows along the conveying pipe 6 into the filter tank 2, entering from the coarse filtration unit. Due to the large pore size of the woven metal mesh, larger impurities in the molten aluminum, such as large oxide inclusions, are intercepted on the outer surface of the mesh. The molten aluminum, under its own weight and the pressure of the subsequent molten aluminum, passes through the pores of the metal mesh and flows from the coarse filtration unit into the filtration chamber of the middle filtration unit 8. At this point, the porous ceramic filter plate comes into play; its high porosity and good chemical stability allow it to capture particles smaller than those intercepted by the coarse filtration unit. When molten aluminum passes through the ceramic filter plate, impurities are blocked on the surface or within the pores of the ceramic filter plate, while the relatively pure molten aluminum passes through. The molten aluminum processed by the middle filtration unit 8 enters the fine filtration unit 9. The nanofiber filter membrane, with its extremely high filtration precision, performs the final interception and filtration of the tiny impurity particles remaining in the molten aluminum. The motor 5 starts and the output shaft rotates to generate power. The motor 5 drives the stirring rod 10 and stirring blades 11 to rotate. Under the action of the stirring blades 11, the molten aluminum forms a complex flow state in each stage of the filtration unit, no longer the single flow mode of traditional static filtration. This complex flow state allows impurities in the molten aluminum to come into more thorough contact with the filter media at each stage, increasing the probability of impurities being intercepted by the filter media, thereby improving the overall filtration effect. In addition, the detachable design of the side cover 3 and the opening 13 facilitates the cleaning of the filtered impurities.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A molten aluminium filtration device characterised in that, It includes a feed hopper (1) and a filter barrel (2), and a conveying pipe (6) is fixedly connected between the feed hopper (1) and the filter barrel (2). The filter barrel is fixedly connected to a coarse filtration unit (7), a medium filtration unit (8) and a fine filtration unit (9). The coarse filtration unit is a metal wire mesh, the medium filtration unit (8) is a porous ceramic filter plate, and the fine filtration unit (9) is a nanofiber filter membrane. The filter barrel is also equipped with a stirring assembly.

2. The aluminum liquid filtration device according to claim 1, characterized in that, The stirring assembly includes a motor (5) fixedly connected to the bottom of the filter barrel (2) and a stirring rod (10) rotatably connected inside the filter barrel (2). Multiple sets of stirring blades (11) are fixedly connected to the outside of the stirring rod (10). The stirring blades (11) are located above the coarse filtration unit, the medium filtration unit (8) and the fine filtration unit (9) respectively. The output end of the motor (5) is fixedly connected to the stirring rod (10).

3. The aluminum liquid filtration device according to claim 1, characterized in that, The filter barrel (2) is equipped with a cleaning component on its exterior.

4. The aluminum liquid filtration device according to claim 3, characterized in that, The cleaning assembly includes an opening (13) located outside the filter barrel (2) and a side cover (3) detachably connected to the outside of the opening (13).

5. An aluminum liquid filtration device according to claim 4, characterized in that, Both ends of the side cover (3) are fixedly connected with slide bars (12), and the side wall of the opening (13) is provided with a slide groove (14), and the slide bar (12) is slidably connected in the slide groove (14).

6. The aluminum liquid filtration device according to claim 5, characterized in that, The bottom of the filter barrel (2) is provided with a connecting plate (4), which is fixedly connected to the side cover (3) and the filter barrel (2) by bolts.

7. An aluminum liquid filtration device according to claim 6, characterized in that, The filter barrel (2) is wrapped with heat-insulating material.

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