Graded recovery device and method for aluminum in aluminum ash

Abstract

The invention relates to the technical field of aluminum ash slag treatment, and discloses a grading recovery device and method for aluminum in aluminum ash slag, the grading recovery device comprises a box body, the top of the box body is connected with a feeding hopper, a plurality of sieve plates are slidably installed in the box body, and the sieve plates are provided with obliquely arranged sieve nets; a positioning plate; and a driving wheel; the driving wheel is driven by the driving source to rotate, the driving wheel drives the sieve plates to turn up and down through the transmission assembly, aluminum ash on each sieve plate rolls in a reciprocating mode, the aluminum ash can be prevented from being accumulated in the included angle between the lower end of each sieve plate and the side wall of the box body, and it is ensured that the aluminum ash on each sieve plate can roll in a reciprocating mode; therefore, the aluminum ash on each layer of screen can be repeatedly sieved, the aluminum ash can be fully contacted with the screens, the situation that part of ash smaller than the size of the screens cannot penetrate through the screen plates due to slag piles is avoided, and the multi-stage recovery effect of aluminum in the aluminum ash is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum ash treatment, and in particular to a device and method for grading and recovering aluminum in aluminum ash. Background Art

[0002] During the production of aluminum alloys, a large amount of aluminum ash slag will appear. In order to achieve effective recycling of resources, the aluminum in the aluminum ash slag needs to be refined and recovered. The graded recovery of aluminum in aluminum ash slag refers to the use of a graded recovery device to grade the aluminum ash slag. The device usually includes a box, a sieve plate, a drive device and other parts. There are multiple sieve plates, which are distributed vertically. The aperture size of the screen on the sieve plate decreases from top to bottom. The sieve plate is driven by the drive device to shake, so that aluminum particles of different diameters can be graded through sieves of different apertures.

[0003] At present, there are some existing technologies that can realize the graded recovery of aluminum in aluminum ash slag, for example, the patent publication number is CN214160410U, and its main technical means is to drive the inclined screen to shake through a driving device to screen the aluminum ash slag, and aluminum particles of different diameters can be screened under the action of multiple screen plates. After analysis, the disadvantage of this technical solution is that when the aluminum ash slag rolls along the inclined screen for screening, it is very easy to accumulate in the angle between the lower end of the screen and the side wall of the box under the action of inertia to form a slag pile, and the ash slag in the slag pile that can pass through the screen cannot fully contact the screen, resulting in low efficiency of graded recovery of aluminum ash slag. Based on this, the present invention provides a graded recovery device and method for aluminum in aluminum ash slag that ensures that the aluminum ash slag on each layer of the screen can be repeatedly screened. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies in the prior art and provide a device and method for grading and recovering aluminum in aluminum ash slag, so as to solve the technical problem that aluminum ash slag is easily accumulated in the angle between the lower end of the screen and the side wall of the box under the action of inertia and cannot be fully screened.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A device for recovering aluminum from aluminum ash slag by classification, comprising:

[0007] A box body, the top of which is connected to a feed hopper, and a plurality of sieve plates are slidably installed therein, the sieve plates are provided with inclined sieves, and the apertures of the sieves decrease from high to low along the height of the sieve plates, and the two sides of the sieve plates are connected to the side walls of the box body through folding plates;

[0008] A positioning plate is fixed on the outer wall of the box body, and a plurality of sieve plates are rotatably mounted on the positioning plates respectively, and a transmission assembly connected to the sieve plates is arranged on the positioning plates; and

[0009] The driving wheel is rotatably mounted on the box body and driven to rotate by a driving source. When the driving source drives the driving wheel to rotate, the driving wheel drives a plurality of screen plates to flip up and down through a transmission assembly.

[0010] As a further solution of the present invention: an open collection box is fixed at one end of the positioning plate, the end of the sieve plate close to the collection box is rotatably connected to the positioning plate through a hinge, and a magnetic block is arranged on the folding plate above this end of the sieve plate, and the magnetic block is magnetically attracted to the magnet fixed on the side wall of the box.

[0011] As a further solution of the present invention: the transmission assembly comprises:

[0012] An assembly box is fixed on the outer wall of the box body, a rotating shaft is rotatably installed inside the assembly box, and the rotating shaft is connected to the driving wheel through a belt, and a first bevel gear is coaxially fixedly installed on the rotating shaft;

[0013] A driven wheel is rotatably mounted in the assembly box, and a second bevel gear meshing with the first bevel gear is coaxially fixedly mounted on the driven wheel, a push rod is fixed on the driven wheel, a vertical rod is fixed on the screen plate, and the position of the vertical rod interferes with the moving path of the push rod; and

[0014] The bottoms of the plurality of sieve plates are respectively connected to the plurality of positioning plates through the plurality of reset members.

[0015] As a further solution of the present invention: a roller is rotatably mounted on the end of the vertical rod that contacts the push rod.

[0016] As a further solution of the present invention: the vertical rod on the top screen plate interferes with the moving path of the push rod, and two adjacent screen plates are connected by a connecting rod.

[0017] As a further solution of the present invention: the driving wheel is coaxially rotatably connected to the feed hopper, and a through hole is opened at its axis, the through hole is located in the discharge port of the feed hopper, and a plurality of circumferentially arranged dividing blocks are arranged in the through hole, and a dispersion cone plate is connected to the bottom of the driving wheel, and a plurality of circumferentially arranged partition rods are arranged on the dispersion cone plate.

[0018] As a further solution of the present invention: a plurality of holes are arranged through the dispersion cone plate, and the diameter of the holes is smaller than the diameter of the screen on the top screen plate.

[0019] A method for graded recovery of aluminum in aluminum ash slag, the method is applied to the graded recovery device for aluminum in aluminum ash slag as described above, the method comprising the following steps:

[0020] Step S1: Aluminum ash slag is fed into the box through a feed hopper, and the aluminum ash slag falls onto the screen plate at the top and rolls along the inclined screen plate;

[0021] Step S2: The aluminum ash slag that passes through the top sieve plate falls onto the next sieve plate for re-screening. The aluminum ash slag passes through several sieve plates in sequence to achieve layer-by-layer screening until it is intercepted;

[0022] Step S3: The driving source drives the driving wheel to rotate, and the driving wheel drives a plurality of sieve plates to flip up and down through the transmission assembly, so that the aluminum ash slag on each sieve plate rolls back and forth.

[0023] As a further solution of the present invention: the step S3 specifically comprises the following steps:

[0024] Step S31: The driving source drives the driving wheel to rotate, and the driving wheel drives the rotating shaft to rotate synchronously through the belt, so that the first bevel gear rotates and drives the second bevel gear to rotate, so that the driven wheel rotates, and then the push rod rotates;

[0025] Step S32: When the push rod rotates to contact the vertical rod, the driven wheel continues to rotate, and the push rod pushes the vertical rod down, driving the top screen plate to flip downward. At this time, the folding plate above the top screen plate is stretched, and the folding plate below it is contracted;

[0026] Step S33: The screen plates are synchronously turned downwards through connecting rods;

[0027] Step S34: After the push rod rotates away from the vertical rod, the reset member drives the top sieve plate to flip upward and reset, and at the same time, the sieve plates are synchronously flipped upward through the connecting rod. At this time, the folding plate above the top sieve plate shrinks, and the folding plate below it stretches;

[0028] Step S35: Repeat steps S32 to S33, and the aluminum ash slag on each sieve plate rolls back and forth.

[0029] Beneficial effects of the present invention:

[0030] (1) In the present invention, the driving wheel is driven to rotate by a driving source, and the driving wheel drives several screen plates to flip up and down through a transmission component, so that the aluminum ash slag on each screen plate rolls back and forth, which can prevent the aluminum ash slag from accumulating in the angle between the lower end of the screen plate and the side wall of the box body, and ensure that the aluminum ash slag on each layer of the screen plate can roll back and forth, thereby achieving repeated screening of the aluminum ash slag on each layer of the screen, ensuring that the aluminum ash slag can fully contact the screen, avoiding the formation of slag piles that cause some ash slag smaller than the size of the screen to be unable to pass through the screen, thereby improving the multi-stage recovery effect of aluminum in the aluminum ash slag;

[0031] (2) In the present invention, after the screening is completed, the magnetic block and the magnet are separated, and the folding plate on which the magnetic block is installed is pressed down, so that the aluminum ash slag on the screen plate can pass through between the magnetic block and the magnet and fall into the collection box, thereby realizing graded recovery;

[0032] (3) In the present invention, when feeding through the feed hopper, the driving source drives the driving wheel to rotate, and then a plurality of partition blocks rotate synchronously, which can break up the aluminum ash slag. The broken aluminum ash slag falls onto the dispersion cone plate and falls along a plurality of partition rods, thereby further dispersing the aluminum ash slag and ensuring that the aluminum ash slag can fully contact the sieve plate. The setting of the holes can realize pre-screening, and the aluminum ash slag that meets the hole diameter will fall onto the sieve plate first after passing through the holes, and the remaining aluminum ash slag will fall onto the sieve plate later. In this way, the aluminum ash slag can be fed in batches and sequentially, thereby ensuring that the aluminum ash slag is fully screened. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 It is a structural schematic diagram of the sieve plate in the present invention;

[0036] Figure 3 It is a structural schematic diagram of the positioning plate in the present invention;

[0037] Figure 4 It is a structural schematic diagram of the transmission assembly in the present invention;

[0038] Figure 5 It is a structural schematic diagram of the rotating shaft in the present invention;

[0039] Figure 6 It is a structural schematic diagram of the partition block in the present invention;

[0040] Figure 7 It is a schematic diagram of the structure of the dispersion cone plate in the present invention.

[0041] In the figure: 1. box body; 2. feed hopper; 3. sieve plate; 4. positioning plate; 5. driving wheel; 6. transmission component; 601. assembly box; 602. rotating shaft; 603. belt; 604. driven wheel; 605. first bevel gear; 606. second bevel gear; 607. push rod; 608. vertical pole; 609. roller; 610. reset member; 611. connecting rod; 7. hinge; 8. folding plate; 9. magnet; 10. magnetic block; 11. collection box; 12. through hole; 13. partition block; 14. dispersion cone plate; 15. partition rod; 16. hole. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figure 1-Figure 3 As shown, the present invention is a device for recovering aluminum from aluminum ash slag, comprising:

[0044] A box body 1, with a feed hopper 2 connected to the top, and a plurality of sieve plates 3 slidably installed therein, wherein the sieve plates 3 are provided with inclined sieves, and the apertures of the sieves decrease from high to low along the height of the sieve plates 3, and both sides of the sieve plates 3 are connected to the side walls of the box body 1 through folding plates 8;

[0045] A positioning plate 4 is fixed on the outer wall of the box body 1, and a plurality of sieve plates 3 are rotatably mounted on the positioning plates 4, respectively. The positioning plates 4 are provided with a transmission assembly 6 connected with the sieve plates 3; and

[0046] The driving wheel 5 is rotatably mounted on the box body 1 and driven to rotate by a driving source. When the driving source drives the driving wheel 5 to rotate, the driving wheel 5 drives a plurality of sieve plates 3 to flip up and down through a transmission assembly 6.

[0047] In one case of this embodiment, the driving source may be a motor assembly, or a gear assembly or a pulley assembly driven by a motor, as long as it can cause the driving wheel 5 to rotate. This embodiment does not make any specific limitation here.

[0048] The ash slag is then fed to the sieve plate 3 on the upper side and rolled along the sieve plate 3 on the lower side for further screening. The ash slag passes through the sieve plate 3 on the upper side and rolls along the sieve plate 3 on the lower side for further screening. The ash slag passes through the sieve plate 3 on the lower side in turn to achieve screening layer by layer until it is intercepted. During this process, the driving source drives the driving wheel 5 to rotate, and the driving wheel 5 drives the sieve plates 3 to flip up and down through the transmission assembly 6. Then, the ash slag on each sieve plate 3 rolls back and forth, which can prevent the ash slag from accumulating in the angle between the lower end of the sieve plate 3 and the side wall of the sieve plate 1, and ensure that the ash slag on each sieve plate 3 can roll back and forth, thereby achieving repeated screening of the ash slag on each sieve layer, ensuring that the ash slag can fully contact the sieve, and avoiding the formation of slag piles that cause some ash slag smaller than the sieve size to be unable to pass through the sieve plate 3, thereby improving the multi-stage recovery effect of aluminum in the ash slag.

[0049] like Figure 1-Figure 3As shown, as a preferred embodiment of the present invention, an open collecting box 11 is fixed to one end of the positioning plate 4, the end of the sieve plate 3 close to the collecting box 11 is rotatably connected to the positioning plate 4 through a hinge 7, and a magnetic block 10 is provided on the folding plate 8 above this end of the sieve plate 3, and the magnetic block 10 is magnetically attracted to the magnet 9 fixed on the side wall of the box body 1.

[0050] In one case of this embodiment, the hinge 7 includes a fixed shaft fixed on the screen plate 3 and a support column fixed on the positioning plate 4, and the fixed shaft and the support column are rotationally connected.

[0051] In actual application of this embodiment, in the initial state, the sieve plate 3 is arranged obliquely, and its end close to the collection box 11 is lower than its end away from the collection box 11; when the sieve plate 3 flips back and forth, relative rotation occurs between the hinge 7 and the positioning plate 4; after the screening is completed, the magnetic block 10 and the magnet 9 are separated, and the folding plate 8 with the magnetic block 10 installed is pressed down, and the aluminum ash slag on the sieve plate 3 can pass through the magnetic block 10 and the magnet 9 and fall into the collection box 11, thereby realizing graded recovery.

[0052] like Figure 1-Figure 6 As shown, as a preferred embodiment of the present invention, the transmission assembly 6 includes:

[0053] An assembly box 601 is fixed on the outer wall of the box body 1, and a rotating shaft 602 is rotatably installed therein, and the rotating shaft 602 is connected to the driving wheel 5 through a belt 603, and a first bevel gear 605 is coaxially fixedly installed on the rotating shaft 602;

[0054] A driven wheel 604 is rotatably mounted in the assembly box 601, and a second bevel gear 606 meshing with the first bevel gear 605 is coaxially fixedly mounted thereon, a push rod 607 is fixed on the driven wheel 604, and a vertical rod 608 is fixed on the sieve plate 3, and the position of the vertical rod 608 interferes with the moving path of the push rod 607; and

[0055] The bottoms of the plurality of sieve plates 3 are connected to the plurality of positioning plates 4 through the plurality of reset members 610 .

[0056] In one case of this embodiment, the reset member 610 can be selected from the following Figure 2 The spring shown can also be replaced by other components with a reset function, such as a spring sheet, an elastic telescopic rod, etc., which is not specifically limited in this embodiment.

[0057] When this embodiment is actually used, the driving source drives the active wheel 5 to rotate, and the active wheel 5 drives the rotating shaft 602 to rotate synchronously through the belt 603, then the first bevel gear 605 rotates and drives the second bevel gear 606 to rotate, so that the driven wheel 604 rotates, and then the push rod 607 rotates; when the push rod 607 rotates to contact with the vertical rod 608, the driven wheel 604 continues to rotate, and the push rod 607 pushes the vertical rod 608 to descend, driving the top sieve plate 3 to flip downward, at this time, the folding plate 8 above the top sieve plate 3 is stretched, and the folding plate 8 below it is contracted; after the push rod 607 rotates away from the vertical rod 608, the reset member 610 drives the top sieve plate 3 to flip upward and reset, at this time, the folding plate 8 above the top sieve plate 3 is contracted, and the folding plate 8 below it is stretched, and this reciprocating process can realize the reciprocating flipping of the sieve plate 3, ensuring that the aluminum ash slag on the sieve plate 3 can roll back and forth to avoid its accumulation.

[0058] like Figure 2 -As shown in Figure 6, as a preferred embodiment of the present invention, a roller 609 is rotatably installed on the end of the vertical rod 608 that contacts the push rod 607; in actual application, when the push rod 607 pushes the vertical rod 608 to flip downward, the roller 609 rotates, which can reduce the wear on the surface of the vertical rod 608.

[0059] like Figure 2-Figure 6 As shown, as a preferred embodiment of the present invention, the vertical rod 608 on the top sieve plate 3 interferes with the moving path of the push rod 607, and the two adjacent sieve plates 3 are connected by a connecting rod 611; in actual application, when the top sieve plate 3 is flipped, several sieve plates 3 are flipped synchronously through the connecting rod 611.

[0060] like Figure 1-Figure 7 As shown, as a preferred embodiment of the present invention, the driving wheel 5 is coaxially connected to the feed hopper 2 for rotation, and a through hole 12 is opened at its axis, the through hole 12 is located in the discharge port of the feed hopper 2, and a plurality of circumferentially arranged dividing blocks 13 are arranged in the through hole 12, and a dispersion cone plate 14 is connected to the bottom of the driving wheel 5, and a plurality of circumferentially arranged partition rods 15 are arranged on the dispersion cone plate 14.

[0061] In one case of this embodiment, a plurality of holes 16 are arranged through the dispersion cone plate 14 , and the diameter of the holes 16 is smaller than the diameter of the sieve on the top sieve plate 3 .

[0062] In actual application, when feeding through the feed hopper 2, the driving source drives the driving wheel 5 to rotate, and then the plurality of partition blocks 13 rotate synchronously, which can break up the aluminum ash slag. The broken aluminum ash slag falls onto the dispersion cone plate 14 and falls along the plurality of partition rods 15, so as to further disperse the aluminum ash slag and ensure that the aluminum ash slag can fully contact the sieve plate 3; the setting of the holes 16 can realize pre-screening, and the aluminum ash slag that meets the diameter of the holes 16 will first fall onto the sieve plate 3 after passing through the holes 16, and the remaining aluminum ash slag will then fall onto the sieve plate 3, so that the aluminum ash slag can be fed in batches and in sequence, thereby ensuring that the aluminum ash slag is fully screened.

[0063] See also Figure 1-Figure 7 As shown, the present invention is a method for graded recovery of aluminum in aluminum ash slag, the method is applied to the device for graded recovery of aluminum in aluminum ash slag as described in the above embodiment, and the method comprises the following steps:

[0064] Step S1: Aluminum ash slag is fed into the box body 1 through the feed hopper 2, and the aluminum ash slag falls onto the sieve plate 3 at the top and rolls along the inclined sieve plate 3;

[0065] Step S2: the aluminum ash slag that passes through the top sieve plate 3 falls onto the next sieve plate 3 for re-screening. The aluminum ash slag passes through several sieve plates 3 in sequence to achieve layer-by-layer screening until it is intercepted;

[0066] Step S3: The driving source drives the driving wheel 5 to rotate, and the driving wheel 5 drives a plurality of sieve plates 3 to flip up and down through the transmission assembly 6, so that the aluminum ash slag on each sieve plate 3 rolls back and forth.

[0067] like Figure 1-Figure 7 As shown, as a preferred embodiment of the present invention, step S3 specifically includes the following steps:

[0068] Step S31: The driving source drives the driving wheel 5 to rotate, and the driving wheel 5 drives the rotating shaft 602 to rotate synchronously through the belt 603, so that the first bevel gear 605 rotates and drives the second bevel gear 606 to rotate, so that the driven wheel 604 rotates, and then the push rod 607 rotates;

[0069] Step S32: When the push rod 607 rotates to contact the vertical rod 608, the driven wheel 604 continues to rotate, and the push rod 607 pushes the vertical rod 608 to descend, driving the top sieve plate 3 to flip downward, at which time the folding plate 8 above the top sieve plate 3 stretches, and the folding plate 8 below it shrinks;

[0070] Step S33: The plurality of sieve plates 3 are synchronously turned downwards through the connecting rod 611;

[0071] Step S34: After the push rod 607 rotates away from the vertical rod 608, the reset member 610 drives the top sieve plate 3 to flip upward and reset, and at the same time, the sieve plates 3 are synchronously flipped upward through the connecting rod 611. At this time, the folding plate 8 above the top sieve plate 3 is contracted, and the folding plate 8 below it is stretched;

[0072] Step S35: Repeat steps S32 to S33, and the aluminum ash slag on each sieve plate 3 rolls back and forth.

[0073] Working principle of the present invention: The above-mentioned embodiment of the present invention provides a device and method for grading and recovering aluminum in aluminum ash slag, wherein the driving wheel 5 is driven to rotate by a driving source, and the driving wheel 5 drives several sieve plates 3 to flip up and down through the transmission component 6, so that the aluminum ash slag on each sieve plate 3 rolls back and forth, which can prevent the aluminum ash slag from accumulating in the angle between the lower end of the sieve plate 3 and the side wall of the box body 1, and ensure that the aluminum ash slag on each layer of the sieve plate 3 can roll back and forth, thereby realizing repeated screening of the aluminum ash slag on each layer of the screen, ensuring that the aluminum ash slag can fully contact the screen, avoiding the formation of slag piles that cause some ash slag smaller than the screen size to be unable to pass through the sieve plate 3, thereby improving the multi-stage recovery effect of aluminum in aluminum ash slag.

[0074] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A device for recovering aluminum from aluminum ash, characterized in that: include: A box (1) is connected to a feed hopper (2) at the top thereof, and a plurality of sieve plates (3) are slidably mounted therein, wherein the sieve plates (3) are provided with inclined sieves, and the apertures of the sieves decrease from high to low along the height of the sieve plates (3), and the two sides of the sieve plates (3) are connected to the side walls of the box (1) via folding plates (8); A positioning plate (4) is fixed on the outer wall of the box body (1), and a plurality of sieve plates (3) are rotatably mounted on the plurality of positioning plates (4), and a transmission assembly (6) connected to the sieve plates (3) is provided on the positioning plate (4); and The driving wheel (5) is rotatably mounted on the box body (1) and driven to rotate by a driving source. When the driving source drives the driving wheel (5) to rotate, the driving wheel (5) drives the plurality of sieve plates (3) to flip up and down through a transmission assembly (6).

2. The device for recovering aluminum from aluminum ash according to claim 1, characterized in that: An open collection box (11) is fixed to one end of the positioning plate (4); the end of the sieve plate (3) close to the collection box (11) is rotatably connected to the positioning plate (4) via a hinge (7); and a magnetic block (10) is provided on the folding plate (8) above this end of the sieve plate (3); the magnetic block (10) is magnetically attracted to a magnet (9) fixed to the side wall of the box body (1).

3. The device for recovering aluminum from aluminum ash according to claim 1, characterized in that: The transmission assembly (6) comprises: An assembly box (601) is fixed on the outer wall of the box body (1), a rotating shaft (602) is rotatably installed inside the assembly box, and the rotating shaft (602) is connected to the driving wheel (5) through a belt (603), and a first bevel gear (605) is coaxially fixedly installed on the rotating shaft (602); A driven wheel (604) is rotatably mounted in the assembly box (601), and a second bevel gear (606) meshing with the first bevel gear (605) is coaxially fixedly mounted on the driven wheel (604), a push rod (607) is fixed on the driven wheel (604), and a vertical rod (608) is fixed on the sieve plate (3), and the position of the vertical rod (608) interferes with the moving path of the push rod (607); and A reset member (610), wherein the bottoms of the plurality of sieve plates (3) are respectively connected to the plurality of positioning plates (4) via the plurality of reset members (610).

4. The device for recovering aluminum from aluminum ash according to claim 3, characterized in that: The end of the vertical rod (608) in contact with the push rod (607) is rotatably mounted with a roller (609).

5. The device for recovering aluminum from aluminum ash according to claim 3, characterized in that: The vertical rod (608) on the sieve plate (3) located at the top interferes with the moving path of the push rod (607), and two adjacent sieve plates (3) are connected by a connecting rod (611).

6. The device for recovering aluminum from aluminum ash according to claim 1, characterized in that: The driving wheel (5) is coaxially connected to the feed hopper (2) for rotation, and a through hole (12) is provided at the axis thereof. The through hole (12) is located in the discharge port of the feed hopper (2), and a plurality of circumferentially arranged partition blocks (13) are provided in the through hole (12). A dispersion cone plate (14) is connected to the bottom of the driving wheel (5), and a plurality of circumferentially arranged partition rods (15) are provided on the dispersion cone plate (14).

7. The device for recovering aluminum from aluminum ash according to claim 6, characterized in that: The dispersion cone plate (14) is provided with a plurality of holes (16) extending therethrough, and the diameter of the holes (16) is smaller than the diameter of the screen on the top screen plate (3).

8. A method for graded recovery of aluminum from aluminum ash slag, characterized in that: The method is applied to the device for graded recovery of aluminum in aluminum ash as claimed in any one of claims 1 to 7, and the method comprises the following steps: Step S1: Aluminum ash slag is fed into the box body (1) through the feed hopper (2), and the aluminum ash slag falls onto the sieve plate (3) at the top and rolls along the inclined sieve plate (3); Step S2: the aluminum ash slag that passes through the top sieve plate (3) falls onto the next sieve plate (3) for re-screening. The aluminum ash slag passes through several sieve plates (3) in sequence to achieve layer-by-layer screening until it is intercepted; Step S3: The driving source drives the driving wheel (5) to rotate, and the driving wheel (5) drives a plurality of sieve plates (3) to turn upside down through the transmission assembly (6), so that the aluminum ash slag on each sieve plate (3) rolls back and forth.

9. The method for graded recovery of aluminum in aluminum ash slag according to claim 8, characterized in that: The step S3 specifically comprises the following steps: Step S31: The driving source drives the driving wheel (5) to rotate, and the driving wheel (5) drives the rotating shaft (602) to rotate synchronously through the belt (603), so that the first bevel gear (605) rotates and drives the second bevel gear (606) to rotate, so that the driven wheel (604) rotates, and then the push rod (607) rotates; Step S32: When the push rod (607) rotates to contact the vertical rod (608), the driven wheel (604) continues to rotate, and the push rod (607) pushes the vertical rod (608) to descend, driving the top sieve plate (3) to flip downward, at which time the folding plate (8) above the top sieve plate (3) stretches, and the folding plate (8) below it contracts; Step S33: The plurality of sieve plates (3) are synchronously turned downwards through the connecting rod (611); Step S34: After the push rod (607) rotates away from the vertical rod (608), the reset member (610) drives the top sieve plate (3) to flip upward and reset, and at the same time, a plurality of sieve plates (3) are synchronously flipped upward through the connecting rod (611), at which time the folding plate (8) above the top sieve plate (3) contracts, and the folding plate (8) below it stretches; Step S35: Repeat steps S32 to S33, so that the aluminum ash slag on each sieve plate (3) rolls back and forth.

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