Mechanism for recycling coarse aluminum powder

Abstract

The utility model provides a kind of coarse aluminium powder recycling mechanism.The mechanism includes vortex separator, from bottom to top includes, vortex fan, screening grinder and revolving cage, the bottom of vortex separator is equipped with aluminium powder discharge gate, and top is equipped with aluminium oxide powder discharge gate A2.Vortex fan includes multiple spoiler along its circumferential distribution, and multiple spoiler is inclined towards the center of vortex fan.Screening grinder includes shell, and the screening plate and grinding portion being arranged in shell interior, shell is communicated with feed pipe, and shell is equipped with release outlet towards vortex fan, screening plate is relatively feed pipe and is inclined arrangement, grinding portion includes grinding inlet and grinding outlet, and grinding outlet is towards release outlet, screening plate is inclined towards grinding inlet, and as the bottom plate of grinding inlet.Aluminium oxide powder discharge gate A2 is communicated with the middle part of revolving cage.The present application can recycle long-term unused aluminium powder.

Description

Technical Field

[0001] This application relates to the industrial production and use of aluminum powder, and more specifically, to a mechanism for recycling and reusing coarse aluminum powder. Background Technology

[0002] Crude aluminum powder, as an important industrial raw material, is widely used in metallurgy, chemical industry, refractory materials, and energetic materials. During its production, transportation, or long-term storage, it often reacts chemically with oxygen in the air to form alumina powder due to failure to be used promptly or exposure to undesirable environments. This oxidation reaction continues and intensifies with prolonged exposure (especially under humid and high-temperature conditions), significantly reducing the content of usable metallic aluminum in the material. Therefore, how to recover this type of long-term exposed crude aluminum powder remains a challenge. Utility Model Content

[0003] This application provides a crude aluminum powder recycling and reuse mechanism that can recycle aluminum powder that has not been used for a long time.

[0004] Specifically, this application is implemented through the following technical solution: One aspect of this application provides a crude aluminum powder recycling and reuse mechanism, comprising: The vortex separator, from bottom to top, includes a vortex blower, a screening and grinding mill, and a rotating drum. The bottom of the vortex separator has an aluminum powder outlet, and the top has an alumina powder outlet. The vortex fan includes a plurality of baffles distributed circumferentially thereon, and the plurality of baffles are inclined toward the center of the vortex fan. The vortex fan is used to generate vortex cyclones and continuously introduce airflow. The screening and grinding mill includes a housing, a screening plate and a grinding section disposed inside the housing. The housing is connected to a feed pipe, and the housing has a discharge outlet facing the vortex blower. The screening plate is inclined relative to the feed pipe. The grinding section includes a grinding inlet and a grinding outlet. The grinding outlet faces the discharge outlet. The screening plate is inclined towards the grinding inlet and serves as the base plate of the grinding inlet. The grinding section is used to grind the aluminum powder material to be recycled that has not passed through the screening plate and is introduced from the feed pipe, and release it from the grinding outlet. The discharge outlet is used to release the aluminum powder material to be recycled that has passed through the screening plate and is released from the grinding section toward the vortex blower. The alumina powder outlet is connected to the middle of the rotating cage, which is used to provide the power to maintain the airflow vortex by rotating. The vortex separator is configured to separate alumina powder and aluminum powder from the aluminum powder material to be recycled through an internally formed vortex gas field.

[0005] Optionally, the coarse aluminum powder recycling and reuse mechanism further includes a cyclone separator connected to the alumina powder outlet A2, used to separate the alumina powder from the airflow carrying the alumina powder.

[0006] Optionally, the grinding part includes a grinding part housing, a rotating part, a grinding medium, and a collection bin. The side wall of the grinding part housing includes a screen hole discharge part with multiple screen holes. The rotating part is rotatably connected inside the grinding part housing. The grinding medium abuts between the rotating part and the screen hole discharge part. The collection bin includes a collection inlet at the upper end and a grinding outlet at the lower end. The size of the collection inlet is larger than the size of the screen hole discharge part of the grinding part housing, and the collection inlet is higher than the screen hole discharge part.

[0007] Optionally, the screen outlet is arranged around the circumference of the grinding section housing, the grinding medium is wear-resistant ceramic balls, and the bottom wall of the grinding section housing is an arc shape protruding towards the collection bin between the rotating part and the screen outlet, for accommodating the wear-resistant ceramic balls.

[0008] Optionally, the feed pipe is located above the grinding section and extends through the grinding section toward the screening plate. A partition is connected between the feed pipe and the grinding section, and the partition and the screening plate form the grinding inlet.

[0009] Optionally, the rotating part is a conical rotating part, and the sidewall of the rotating part that abuts against the grinding medium is an arc shape protruding away from the grinding medium.

[0010] Optionally, the screening and grinding mill further includes a conical top, the outer wall of which has a guide groove extending in a vortex shape from bottom to top.

[0011] Optionally, the screening and grinding mill further includes a fixing frame located at the bottom of the screening and grinding mill. The fixing frame is cross-shaped and fixed to the side wall of the vortex separator. The screening and grinding mill is mounted on the fixing frame.

[0012] This application provides a coarse aluminum powder recycling and reuse mechanism. The mechanism allows material to first impact an inclined screening plate. Unagglomerated fine particles, containing aluminum powder and alumina powder, pass directly through the screening plate. Agglomerated lumps roll down the inclined surface of the screening plate to the grinding inlet of the grinding section, where they undergo high-intensity crushing and deagglomeration. Vortex pneumatic separation, under the combined action of a strong vortex cyclone generated by a vortex blower and the rotation of the top rotating drum, draws the mixed fine particles discharged from the release outlet into a stable vortex field rotating from bottom to top. Within this vortex field: large-sized metallic aluminum particles are thrown towards the periphery of the vortex field by strong centrifugal force, overcoming the resistance of the rising airflow and rapidly settling, ultimately being recovered from the bottom aluminum powder outlet. Ultrafine alumina powder, subjected to weak centrifugal force, is easily carried by the airflow and moves with the central rising airflow to the top, where it is guided by the rotating drum and discharged from the top alumina powder outlet. This application obtains high-purity aluminum powder that can be directly recycled through the bottom aluminum powder outlet, and discharges alumina through the top alumina powder outlet, thereby realizing the recycling and reuse of coarse aluminum powder. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a crude aluminum powder recycling and reuse mechanism shown in an exemplary embodiment of this application; Figure 2 This is a schematic diagram of a screening and grinding mill shown in an exemplary embodiment of this application; Figure 3 This is a schematic diagram of a grinding section shown in an exemplary embodiment of this application; Figure 4 This is an internal schematic diagram of a vortex fan shown in an exemplary embodiment of this application; Figure 5 This is a top view of the interior of an eddy current separator shown in an exemplary embodiment of this application; Figure 6 This is a top view of a screening and grinding machine illustrated in an exemplary embodiment of this application.

[0014] Wherein: A, Vortex separator; B, Cyclone separator; 100, Vortex fan; 110, Baffle plate; 200, Screening and grinding mill; 210, Shell; 211, Release outlet; 220, Screening plate; 230, Grinding section; 231, Grinding inlet; 232, Grinding outlet; 233, Grinding section shell; 233a, Screen hole discharge section; 234, Rotating section; 235, Grinding media; 236, Collection bin; 236a, Collection inlet; 237, Baffle plate; 240, Conical top; 241, Guide groove; 250, Fixed frame; 300, Rotary cage; A1, Aluminum powder outlet; A2, Alumina outlet; A3, Feed pipe. Detailed Implementation

[0015] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0016] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0017] Based on the above issues, and considering that during exposure, aluminum powder and newly generated alumina powder are prone to agglomeration and clumping under the combined influence of oxygen and humidity (moisture), increasing the difficulty of recovery. (Reference) Figure 1 , Figure 2 and Figure 3 This application provides a device for recycling and reusing coarse aluminum powder, including a vortex separator A. The vortex separator A, from bottom to top, includes a vortex blower 100, a screening and grinding mill 200, and a rotating drum 300. The bottom of the vortex separator A has an aluminum powder outlet A1, and the top has an alumina powder outlet A2.

[0018] Combination Figure 4 The vortex fan 100 includes a plurality of baffles 110 distributed circumferentially thereon, and the plurality of baffles 110 are inclined toward the center of the vortex fan 100. The vortex fan 100 is used to generate vortex cyclones and continuously introduce airflow.

[0019] The screening and grinding mill 200 includes a housing 210, a screening plate 220 and a grinding section 230 disposed inside the housing 210. The housing 210 is connected to a feed pipe A3, and the housing 210 has a release outlet 211 facing the vortex blower 100. The screening plate 220 is inclined relative to the feed pipe A3. The grinding section 230 includes a grinding inlet 231 and a grinding outlet 232. The grinding outlet 232 faces the release outlet 211. The screening plate 220 is inclined towards the grinding inlet 231 and serves as the base plate of the grinding inlet 231. The grinding section 230 is used to grind the aluminum powder material to be recycled that is fed from the feed pipe A3 but has not passed through the screening plate 220 and release it from the grinding outlet 232. The release outlet 211 is used to release the aluminum powder material to be recycled that has passed through the screening plate 220 and is released from the grinding section 230 toward the vortex blower 100. The alumina powder outlet A2 is connected to the middle of the rotating drum 300, which provides the power to maintain the airflow vortex through rotation. The vortex separator A is configured to separate alumina powder and aluminum powder from the aluminum powder material to be recycled through the vortex air field formed inside.

[0020] The outlet 211 can be located in the center of the shell 210. The feed pipe A3 carries the aluminum powder to be recovered into the screening and grinding mill 200 through an inert gas flow. The aluminum powder to be recovered enters the screening and grinding mill 200 from the feed pipe A3 under the influence of an inert gas (such as nitrogen) flow. The material first impacts the inclined screen plate 220. Unagglomerated fine particles, containing aluminum powder and alumina powder, pass directly through the screen plate 220. Agglomerated lumps roll down the inclined surface of the screen plate 220 to the grinding inlet 231 of the grinding section 230, where they undergo high-intensity crushing and deagglomeration. This process crushes the lumps and also peels off the oxide layer covering the surface of the aluminum particles, releasing the internal aluminum core. The powder, after being ground and crushed, is then released from the grinding outlet 232. All fine particulate materials, whether they come from passing directly through the screening plate 220 or after grinding, eventually converge and enter the chamber above the vortex blower 100 through the release port 211 of the shell 210.

[0021] In the vortex aerodynamic separation process, under the combined action of the strong vortex cyclone generated by the vortex blower 100 and the rotation of the top rotating cage 300, the mixed fine particulate material discharged from the release port 211 is drawn into a stable vortex field rotating from bottom to top. Within this vortex field: large-sized metallic aluminum particles are thrown towards the periphery of the vortex field by strong centrifugal force, overcoming the resistance of the rising airflow and rapidly settling, ultimately being recovered through the bottom aluminum powder outlet A1. Ultrafine alumina powder, with its extremely small particle size, large specific surface area, and low bulk density, experiences weak centrifugal force and is easily carried by the airflow, moving to the top with the central rising airflow. Guided by the rotating cage 300, it is discharged through the alumina powder outlet A2 connected in the middle of the rotating cage 300. This application obtains high-purity aluminum powder that can be directly reused through the bottom aluminum powder outlet A1, and discharges alumina through the top alumina powder outlet A2, achieving the recycling and reuse of coarse aluminum powder.

[0022] refer to Figure 1 In one embodiment, the coarse aluminum powder recycling mechanism further includes a cyclone separator B, connected to the alumina powder outlet A2, for separating alumina powder from the airflow carrying alumina powder. Connected to the alumina powder outlet A2 at the top of the vortex separator A, it performs secondary gas-solid separation on the dust-laden airflow, which mainly contains ultrafine alumina powder and a small amount of escaping gas, ensuring efficient capture and retention of the alumina powder. The separated clean inert gas (such as nitrogen) can be recycled back to the feeding system, reducing gas consumption. The recovered alumina powder can be used as refractory materials or ceramic raw materials, etc.

[0023] refer to Figure 3 In one embodiment, the grinding part 230 includes a grinding part housing 233, a rotating part 234, a grinding medium 235, and a collection bin. The side wall of the grinding part housing 233 includes a screen hole discharge part 233a, which has a plurality of screen holes. The rotating part 234 is rotatably connected to the inside of the grinding part housing 233. The grinding medium 235 abuts between the rotating part 234 and the screen hole discharge part 233a. The collection bin includes a collection inlet 236a and a grinding outlet 232 located at the lower end. The size of the collection inlet 236a is larger than the size of the screen hole discharge part 233a of the grinding part housing 233, and the collection inlet 236a is higher than the screen hole discharge part 233a. The rotating part 234 drives the grinding media 235 (such as ceramic balls) to generate strong shearing and extrusion. The grinding media 235 is confined between the rotating part 234 and the sieve outlet 233a, forming a grinding belt. The sieve outlet 233a has openings (the aperture is approximately equal to the target fineness) to screen qualified fine powder in real time. The collection inlet 236a can collect the powder from the sieve outlet 233a after grinding and then release it from the grinding outlet 232. Thus, grinding and post-grinding discharge are realized.

[0024] In one embodiment, the screen discharge section 233a is arranged circumferentially around the housing 210. The grinding media 235 is a wear-resistant ceramic ball. The bottom wall of the housing 210, between the rotating part 234 and the screen discharge section 233a, is an arc protruding towards the collection bin to accommodate the wear-resistant ceramic ball. The screen discharge section 233a, arranged circumferentially around the housing 210, greatly increases the uniformity and efficiency of the discharge. The grinding media 235 is made of wear-resistant ceramic balls, which have extremely high hardness and good wear resistance. The bottom wall of the housing 210, designed as an arc protruding towards the collection bin between the rotating part 234 and the screen discharge section 233a, provides a suitable movement trajectory and accommodating space for the wear-resistant ceramic ball. The arc-shaped bottom wall not only helps guide the movement of the grinding media 235, allowing it to be more evenly distributed and rolled during the grinding process, but also...

[0025] Combination Figure 3 and Figure 5 In one embodiment, the feed pipe A3 is located above the grinding section 230 and extends through the grinding section 230 towards the screening plate 220. A partition 237 connects the feed pipe A3 and the grinding section 230, forming a grinding inlet 231 with the screening plate 220. The feed pipe A3 extends directly from above to the screening plate 220, and the partition 237 forms the grinding inlet 231 with the screening plate 220. This design allows the material to impact the screening plate 220 more naturally under gravity. This ensures that most of the material is screened by the screening plate 220 before entering the grinding section 230, reducing the amount of material directly entering the grinding section 230.

[0026] In one embodiment, the rotating part 234 is a conical rotating part 234, and the sidewall of the rotating part 234 that abuts against the grinding medium is an arc shape protruding away from the grinding medium. This conical structure can effectively guide the material to be ground from the grinding inlet 231 to slide into the grinding area. At the same time, the arc shape of the sidewall of the rotating part 234 that abuts against the grinding medium matches the spherical shape of the grinding medium, allowing the grinding medium to move more closely against the sidewall of the rotating part 234 during the grinding process, optimizing the grinding trajectory and enhancing the grinding effect.

[0027] Combination Figure 1 and Figure 2 In one embodiment, the screening and grinding mill 200 further includes a conical top 240, the outer wall of which has a guide groove 241 extending upward in a vortex shape. When the vortex passes through the conical top 240 from bottom to top, the guide groove 241 can guide the airflow to form a stable vortex path, making the airflow flow more smoothly. At the same time, the fit between the guide groove 241 and the vortex can enhance the rotation effect of the airflow and improve the separation efficiency.

[0028] Combination Figure 1 and Figure 6In one embodiment, the screening and grinding mill 200 further includes a fixing frame 250 located at the bottom of the screening and grinding mill 200. The fixing frame 250 is cross-shaped and fixed to the side wall of the eddy current separator A. The screening and grinding mill 200 is mounted on the fixing frame 250. The cross-shaped fixing frame 250 provides stable support for the screening and grinding mill 200, enhancing the smoothness of equipment operation.

[0029] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A mechanism for recycling and reusing coarse aluminum powder, characterized in that, include: The vortex separator (A) includes, from bottom to top, a vortex blower (100), a screening and grinding mill (200), and a rotating drum (300). The bottom of the vortex separator (A) is provided with an aluminum powder outlet (A1), and the top is provided with an alumina powder outlet (A2). The vortex fan (100) includes a plurality of baffles (110) distributed circumferentially thereon, and the plurality of baffles (110) are inclined toward the center of the vortex fan (100), the vortex fan (100) is used to generate vortex cyclones and continuously introduce airflow; The screening and grinding mill (200) includes a housing (210), a screening plate (220) and a grinding section (230) disposed inside the housing (210). The housing (210) is connected to a feed pipe (A3), and the housing (210) has a discharge outlet (211) facing the vortex blower (100). The screening plate (220) is inclined relative to the feed pipe (A3). The grinding section (230) includes a grinding inlet (231) and a grinding outlet (232). The grinding outlet (232) faces the vortex blower (100). The sieve plate (220) is inclined toward the grinding inlet (231) and serves as the base plate of the grinding inlet (231). The grinding section (230) is used to grind the aluminum powder material to be recycled that is introduced from the feed pipe (A3) but has not passed through the sieve plate (220) and release it from the grinding outlet (232). The sieve plate (211) is used to release the aluminum powder material to be recycled that has passed through the sieve plate (220) and released from the grinding section (230) toward the vortex blower (100). The alumina powder outlet (A2) is connected to the middle of the rotating drum (300), which is used to provide power to maintain the airflow vortex by rotating. The vortex separator (A) is configured to separate alumina powder and aluminum powder from the aluminum powder material to be recycled through an internally formed vortex gas field.

2. The crude aluminum powder recycling and reuse mechanism as described in claim 1, characterized in that, The coarse aluminum powder recycling and reuse mechanism also includes a cyclone separator (B), which is connected to the alumina powder outlet (A2) and is used to separate the alumina powder from the airflow carrying the alumina powder.

3. The crude aluminum powder recycling and reuse mechanism as described in claim 1, characterized in that, The grinding section (230) includes a grinding section housing (233), a rotating section (234), a grinding medium (235), and a collection bin. The side wall of the grinding section housing (233) includes a screen outlet section (233a), which has multiple screen holes. The rotating section (234) is rotatably connected to the inside of the grinding section housing (233). The grinding medium (235) abuts between the rotating section (234) and the screen outlet section (233a). The collection bin includes a collection inlet (236a) at the upper end and a grinding outlet (232) at the lower end. The size of the collection inlet (236a) is larger than the size of the screen outlet section (233a) of the grinding section housing (233), and the collection inlet (236a) is higher than the screen outlet section (233a).

4. The crude aluminum powder recycling and reuse mechanism as described in claim 3, characterized in that, The screen discharge section (233a) is arranged around the circumference of the grinding section housing (233), the grinding medium (235) is wear-resistant ceramic ball, and the bottom wall of the grinding section housing (233) is an arc protruding towards the collection bin between the rotating part (234) and the screen discharge section (233a) to accommodate the wear-resistant ceramic ball.

5. The crude aluminum powder recycling and reuse mechanism as described in claim 3, characterized in that, The feed pipe (A3) is located above the grinding section (230) and passes through the grinding section (230) to the sieve plate (220). A partition (237) is connected between the feed pipe (A3) and the grinding section (230), and the partition (237) and the sieve plate (220) form the grinding inlet (231).

6. The crude aluminum powder recycling and reuse mechanism as described in claim 4, characterized in that, The rotating part (234) is a conical rotating part (234), and the side wall of the rotating part (234) that abuts against the grinding medium is an arc shape protruding away from the grinding medium.

7. The crude aluminum powder recycling and reuse mechanism as described in claim 1, characterized in that, The screening and grinding mill (200) also includes a conical top (240), and the outer wall of the conical top (240) is provided with a guide groove (241) extending from bottom to top in a vortex shape.

8. The crude aluminum powder recycling and reuse mechanism as described in claim 1, characterized in that, The screening and grinding mill (200) also includes a fixing frame (250) located at the bottom of the screening and grinding mill (200). The fixing frame (250) is cross-shaped and fixed to the side wall of the vortex separator (A). The screening and grinding mill (200) is mounted on the fixing frame (250).

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