Aluminum ash slag metal recovery and processing device

By arranging multiple feed ports on the upper surface of the grinding hopper of the aluminum ash slag recovery and treatment device, and combining the rotating feed hopper and grinding rollers, multi-position grinding of aluminum ash slag is achieved, and the problem of insufficient grinding is solved. At the same time, a dust-proof structure is adopted to prevent dust from scattering, improving the metal recovery rate and environmental protection effect.

CN118925854BActive Publication Date: 2025-01-21MEIZHOU HUAXIN SECOND FACTORY ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Application Number
CN202411267003.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-10
Publication Date
2025-01-21
Estimated Expiration
2044-09-10

AI Technical Summary

Technical Problem

The existing aluminum ash slag recycling and treatment devices have problems such as insufficient grinding and dust dissipation during the grinding process, resulting in low metal recovery and environmental pollution.

Method used

An aluminum ash slag metal recovery and treatment device is designed. By setting multiple feed ports on the upper surface of the grinding hopper, and using rotating feed hoppers and grinding rollers, multi-position grinding of aluminum ash slag is achieved to improve grinding efficiency. At the same time, a dust-proof structure is adopted to prevent dust from scattering through the cooperation of dust-proof plates, limit rings and baffles.

Benefits of technology

It improves the grinding efficiency of aluminum ash and slag, increases the metal recovery rate, effectively prevents dust from spreading to the outside world, and protects the environment and the health of workers.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses an aluminum ash slag metal recovery and processing device, which belongs to the field of metal recovery technology, and comprises a shell, a driving component, a feeding component and a limiting component, wherein the shell comprises a grinding bucket, a plurality of feeding ports are provided on the upper surface of the grinding bucket, a discharge pipe is provided at the bottom of the grinding bucket, and the driving component comprises a first motor, which is connected to the back of the grinding bucket, and the output shaft of the first motor is connected to a rotating shaft, which is rotatably connected to a bearing seat outside the rotating shaft, and the bearing seat is connected to the back of the grinding bucket; the invention controls the first motor to work, and the rotating feeding hopper can add aluminum ash slag into the grinding bucket through a plurality of feeding ports distributed in a circular array, so that the grinding surfaces of the grinding roller and the grinding bucket at the same height can perform grinding operations at multiple positions, so that the grinding positions of the device can be fully utilized, thereby improving the grinding efficiency of the device.
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Description

Technical Field

[0001] The invention belongs to the technical field of metal recovery, and in particular relates to an aluminum ash slag metal recovery and processing device. Background Art

[0002] Aluminum ash slag is a by-product of aluminum and aluminum alloy smelting. It is composed of alumina, metallic aluminum or aluminum alloy, slag-making agent, etc. Aluminum ash slag contains 10-80% aluminum or aluminum alloy, so it has a high recycling value. At present, there are two types of aluminum recovery methods from aluminum ash slag at home and abroad: hot recovery method and cold recovery method. The hot recovery method is to place the aluminum ash slag just taken out of the smelting furnace in an inclined rotary tank for stir-frying. The aluminum is fully in contact with the air to produce aluminothermic reaction, increase the temperature of the aluminum and thus increase its fluidity. Under the action of gravity, the aluminum is enriched and recovered. The hot recovery method has serious aluminum burnout and low metal recovery rate. In addition, a large amount of fluorine and chlorine-containing flue gas is generated during the stirring process, which has a serious impact on the environment. The method of cold treatment of aluminum ash slag is to let it quickly enter the cooling equipment, quickly reduce the temperature of the aluminum ash slag, and make the aluminum in it into granules, and use gravity separation method for recovery.

[0003] For example, a Chinese patent (publication number: CN218478792U) discloses an aluminum ash slag recovery and processing device, including a grinding bucket and a grinding roller, wherein the grinding roller is arranged in the grinding bucket, and a grinding gap is arranged between the grinding roller and the grinding bucket, wherein the grinding gap gradually decreases from top to bottom, and a rotating mechanism for driving the grinding roller to rotate is arranged on the top of the grinding roller. The utility model drives the gear ring to rotate synchronously with the rotating body through the first motor, and the grinding roller can be driven to rotate through the rotating body, so that the aluminum ash slag in the grinding gap can be continuously ground through the grinding roller and the grinding bucket. Since the grinding gap gradually decreases from top to bottom, the aluminum ash slag can be ground roughly first and then finely, so that the grinding effect of the aluminum ash slag is better, so that the aluminum ash slag can be changed into smaller fine slag, which is convenient for subsequent smelting;

[0004] However, the above patent has the following shortcomings: since the feeding structure at the top of the grinding bucket is fixed, the aluminum ash slag poured into the feeding structure can only move to the grinding roller and a position on the top of the grinding roller for grinding, and then is ground. The aluminum ash slag is not ground at the rest of the grinding plane at this height, which reduces the grinding effect of the device. In addition, the dust generated by the grinding roller and the grinding bucket during the grinding of the aluminum ash slag may be dispersed to the outside through the feeding structure, thereby affecting the external environment and the health of the staff. Therefore, an aluminum ash slag metal recovery and processing device is needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an aluminum ash slag metal recovery and processing device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: an aluminum ash slag metal recovery and processing device, comprising a housing, a driving assembly, a feeding assembly and a limiting assembly, the housing comprising a grinding bucket, a plurality of feeding ports are provided on the upper surface of the grinding bucket, and a discharge pipe is provided at the bottom of the grinding bucket;

[0007] The driving assembly includes a first motor, the first motor is connected to the back of the grinding bucket, the output shaft of the first motor is connected to a rotating shaft, the rotating shaft is rotatably connected to a bearing seat, the bearing seat is connected to the back of the grinding bucket, the top of the rotating shaft is connected to a gear, and the gear is meshed with a gear ring;

[0008] The feed assembly comprises a feed hopper, two sides of which are respectively connected to a first movable block and a second movable block, the first movable block is connected to a rotating ring, and the first movable block and the rotating ring are connected in a gear ring;

[0009] The limiting assembly includes a first limiting ring and a second limiting ring, both of which are connected to the upper surface of the grinding bucket, the first movable block and the rotating ring are slidably connected in the first limiting ring, and the second movable block is slidably connected in the second limiting ring.

[0010] As a preferred solution, the feed hopper is connected to a dustproof assembly, the dustproof assembly includes a dustproof plate and a baffle, the dustproof plate is connected to the feed hopper, and the baffle is hinged to the top of the feed hopper through a hinge.

[0011] As a preferred solution, the dustproof plate is overlapped between the first limiting ring and the second limiting ring, a plurality of feed ports are arranged between the first limiting ring and the second limiting ring, and the dustproof plate and the feed hopper are arranged above the plurality of feed ports.

[0012] As a preferred solution, a grinding assembly is provided in the grinding bucket, and the grinding assembly includes a second motor and a grinding roller. The grinding roller is rotatably connected in the grinding bucket, the top end of the grinding roller is connected to the second motor, and the second motor is connected to the upper surface of the grinding bucket. The outer surface of the upper part of the grinding roller is set to be inclined.

[0013] As a preferred solution, a cleaning assembly is provided on the lower surface of the dustproof plate, and the cleaning assembly includes a first gathering bar and a second gathering bar, wherein the first gathering bar and the second gathering bar are both connected to the lower surface of the dustproof plate, and the first gathering bar and the second gathering bar are both overlapped on the upper surface of the grinding bucket.

[0014] As a preferred solution, the first gathering strip and the second gathering strip are overlapped between the first limiting ring and the second limiting ring.

[0015] As a preferred solution, the second movable block is arranged between the second limiting ring and the second motor.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention controls the first motor to work, and the rotating feed hopper can add aluminum ash slag into the grinding hopper through a plurality of feed ports distributed in a circumferential array, so that the grinding surfaces of the grinding roller and the grinding hopper at the same height can perform grinding operations at multiple locations, so that the grinding locations of the device can be fully utilized, thereby improving the grinding efficiency of the device;

[0018] In the present invention, the dust-proof structure formed by the cooperation of the dust-proof plate, the first limiting ring and the second limiting ring can block the feed port that is not corresponding to the feed hopper, and the dust-proof structure formed by the cooperation of the feed hopper and the baffle can block the feed port corresponding to the feed hopper, so that the dust generated during the grinding process of the aluminum ash slag in the grinding hopper is not easy to float to the outside through the feeding structure and thus affect the surrounding environment and the health of the staff;

[0019] According to the present invention, the rotating first gathering bar can push the aluminum ash slag remaining on the bottom of the feed hopper and the upper surface of the grinding hopper and gather them to the middle part thereof, the rotating second gathering bar can again clean and gather the part cleaned by the first gathering bar, and the rotating first gathering bar and the second gathering bar can cooperate with each other to perform double cleaning of the aluminum ash slag remaining on the bottom of the feed hopper and the upper surface of the grinding hopper, which not only improves the cleaning effect, but also after the rotating first gathering bar and the second gathering bar push the cleaned and gathered aluminum ash slag to move above the feed port, the aluminum ash slag can move through the feed port to between the grinding roller and the grinding hopper, so that the aluminum ash slag poured into the feed hopper is not easily lost in the process of entering the grinding hopper through the feed port. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the first motor of the present invention;

[0022] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the three-dimensional grinding bucket of the present invention;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the cleaning assembly of the present invention;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the feed port of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the rotating ring of the present invention;

[0027] Figure 8 It is a structural schematic diagram of a three-dimensional cross-section of the first movable block of the present invention.

[0028] In the figure: 1. casing; 11. grinding bucket; 12. feed port; 13. discharge pipe; 2. drive assembly; 21. first motor; 22. rotating shaft; 23. bearing seat; 24. gear; 25. gear ring; 3. feed assembly; 31. feed hopper; 32. first movable block; 33. rotating ring; 34. second movable block; 4. limit assembly; 41. first limit ring; 42. second limit ring; 5. dustproof assembly; 51. dustproof plate; 52. baffle; 6. grinding assembly; 61. second motor; 62. grinding roller; 7. cleaning assembly; 71. first gathering strip; 72. second gathering strip. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the embodiments.

[0030] The following examples are used to illustrate the present invention, but they cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions. Simple improvements to the method of the present invention under the premise of the concept of the present invention belong to the scope of protection claimed in the present invention.

[0031] See also Figure 1-8 The present invention provides an aluminum ash slag metal recovery and processing device, comprising a housing 1, a driving assembly 2, a feeding assembly 3 and a limiting assembly 4, wherein the housing 1 comprises a grinding bucket 11, a plurality of feeding ports 12 are provided on the upper surface of the grinding bucket 11, and a discharge pipe 13 is provided at the bottom of the grinding bucket 11;

[0032] The driving assembly 2 includes a first motor 21, which is connected to the back of the grinding bucket 11. The output shaft of the first motor 21 is connected to a rotating shaft 22, and the rotating shaft 22 is externally rotatably connected to a bearing seat 23, and the bearing seat 23 is connected to the back of the grinding bucket 11. The top of the rotating shaft 22 is connected to a gear 24, and the gear 24 is meshed with a gear ring 25.

[0033] The feed assembly 3 includes a feed hopper 31, both sides of which are connected to a first movable block 32 and a second movable block 34 respectively, the first movable block 32 is connected to a rotating ring 33, and the first movable block 32 and the rotating ring 33 are connected in the gear ring 25;

[0034] The limiting assembly 4 includes a first limiting ring 41 and a second limiting ring 42, both of which are connected to the upper surface of the grinding bucket 11, the first movable block 32 and the rotating ring 33 are slidably connected in the first limiting ring 41, and the second movable block 34 is slidably connected in the second limiting ring 42.

[0035] In this embodiment, by providing a bearing seat 23, the bearing seat 23 can limit and fix the rotating shaft 22 on the back of the grinding bucket 11; by providing a gear 24 and a gear ring 25, because the gear 24 and the gear ring 25 are meshed, the rotating gear 24 can drive the first movable block 32 and the rotating ring 33 to rotate through the gear ring 25, and because the rotating ring 33 and the first movable block 32 are slidably connected in the first limiting ring 41, the first limiting ring 41 can limit the feed hopper 31 through the rotating ring 33 and the first movable block 32, so that the rotating rotating ring 33 can drive the feed hopper 31 to rotate stably;

[0036] By controlling the first motor 21 to work, the rotating feed hopper 31 can add aluminum ash slag into the grinding hopper 11 through a plurality of feed ports 12 distributed in a circular array, so that the grinding surfaces of the grinding roller 62 and the grinding hopper 11 at the same height can perform multi-position grinding operations, so that the grinding parts of the device can be fully utilized, thereby improving the grinding efficiency of the device.

[0037] like Figure 1 and Figure 4 As shown, an aluminum ash slag metal recovery and processing device provided by the present invention, the feed hopper 31 is connected to the dustproof component 5, the dustproof component 5 includes a dustproof plate 51 and a baffle 52, the dustproof plate 51 is connected to the feed hopper 31, and the baffle 52 is hinged to the top of the feed hopper 31 through a hinge.

[0038] In this embodiment, the dust-proof structure formed by the cooperation between the feed hopper 31 and the baffle 52 can block the feed port 12 corresponding to the feed hopper 31, so that the dust generated during the grinding process of the aluminum ash slag in the grinding hopper 11 is not easy to drift to the outside through the feed structure and thus affect the surrounding environment and the health of the staff.

[0039] like Figure 4 and Figure 6 As shown, an aluminum ash slag metal recovery and processing device provided by the present invention, the dustproof plate 51 is overlapped between the first limiting ring 41 and the second limiting ring 42, a plurality of feed ports 12 are arranged between the first limiting ring 41 and the second limiting ring 42, and the dustproof plate 51 and the feed hopper 31 are arranged above the plurality of feed ports 12.

[0040] In this embodiment, the dustproof structure formed by the dustproof plate 51, the first limiting ring 41 and the second limiting ring 42 can block several feed ports 12 that do not correspond to the feed hopper 31, so that the dust generated during the grinding process of aluminum ash slag in the grinding hopper 11 is not easy to drift to the outside through the feeding structure and thus affect the surrounding environment and the health of the staff.

[0041] like Figure 4 As shown, an aluminum ash slag metal recovery and processing device provided by the present invention, a grinding assembly 6 is provided in the grinding bucket 11, the grinding assembly 6 includes a second motor 61 and a grinding roller 62, the grinding roller 62 is rotatably connected in the grinding bucket 11, the top end of the grinding roller 62 is connected to the second motor 61, the second motor 61 is connected to the upper surface of the grinding bucket 11, and the outer surface of the upper part of the grinding roller 62 is set to be inclined.

[0042] In this embodiment, since the outer surface of the upper part of the grinding roller 62 is set to be inclined, and a plurality of feed ports 12 are arranged directly above the inclined portion of the grinding roller 62, the aluminum ash slag moving into the grinding bucket 11 through the feed port 12 collides with the grinding roller 62 under the action of its own gravity, and then slides along the inclined grinding roller 62 to between the grinding roller 62 and the grinding bucket 11, and then the working second motor 61 drives the grinding roller 62 to grind the aluminum ash slag between the grinding roller 62 and the grinding bucket 11.

[0043] like Figure 5 and Figure 6 As shown, an aluminum ash slag metal recovery and processing device provided by the present invention, a cleaning assembly 7 is provided on the lower surface of the dustproof plate 51, and the cleaning assembly 7 includes a first gathering bar 71 and a second gathering bar 72, the first gathering bar 71 and the second gathering bar 72 are both connected to the lower surface of the dustproof plate 51, and the first gathering bar 71 and the second gathering bar 72 are both overlapped on the upper surface of the grinding bucket 11.

[0044] In this embodiment, the rotating first gathering bar 71 can push and gather the aluminum ash slag remaining on the bottom of the feed hopper 31 and the upper surface of the grinding hopper 11 to the middle part thereof, and the rotating second gathering bar 72 can clean and gather the part cleaned by the first gathering bar 71 again. The rotating first gathering bar 71 and the second gathering bar 72 cooperate with each other to perform double cleaning of the aluminum ash slag remaining on the bottom of the feed hopper 31 and the upper surface of the grinding hopper 11, which not only improves the cleaning effect, but also after the rotating first gathering bar 71 and the second gathering bar 72 push the cleaned and gathered aluminum ash slag to move above the feed port 12, the aluminum ash slag can move through the feed port 12 to between the grinding roller 62 and the grinding hopper 11, so that the aluminum ash slag poured into the feed hopper 31 is not easily lost in the process of passing through the feed port 12 and entering the grinding hopper 11.

[0045] like Figure 5 and Figure 6As shown, an aluminum ash slag metal recovery and processing device provided by the present invention is provided, and the first gathering bar 71 and the second gathering bar 72 are overlapped between the first limiting ring 41 and the second limiting ring 42.

[0046] In this embodiment, the first limiting ring 41 and the second limiting ring 42 can block the aluminum ash slag remaining at the bottom of the feed hopper 31 and the upper surface of the grinding hopper 11, and because the first gathering bar 71 and the second gathering bar 72 are overlapped between the first limiting ring 41 and the second limiting ring 42, the first gathering bar 71 and the second gathering bar 72 cooperate with each other to clean the aluminum ash slag remaining at the bottom of the feed hopper 31 and the upper surface of the grinding hopper 11 without dead angles.

[0047] like Figure 4 As shown, an aluminum ash slag metal recovery and processing device provided by the present invention is provided, and the second movable block 34 is arranged between the second limiting ring 42 and the second motor 61.

[0048] In this embodiment, the second limiting ring 42 and the second movable block 34 cooperate with each other to limit the feed hopper 31, so that the feed hopper 31 can stably rotate between the first limiting ring 41 and the limiting ring.

[0049] The working principle and use process of the present invention are as follows: when the device needs to be used, the baffle 52 is pulled to rotate around the hinge, at which time the feed hopper 31 is opened, and then a certain amount of aluminum ash slag is poured into the feed hopper 31, and then the baffle 52 is closed, at which time the device completes the feeding;

[0050] The first motor 21 is controlled to work. The working first motor 21 drives the rotating shaft 22 to rotate in the bearing seat 23. The rotating rotating shaft 22 drives the gear ring 25 to rotate through the gear 24. The rotating gear ring 25 drives the first movable block 32 and the rotating ring 33 to rotate in the first limiting ring 41. The rotating first movable block 32 drives the feed hopper 31 to rotate between the first limiting ring 41 and the second limiting ring 42. At the same time, the rotating feed hopper 31 drives the second movable block 34 to rotate in the second limiting ring 42. The rotating feed hopper 31 drives the dustproof plate 51 to rotate between the first limiting ring 41 and the second limiting ring 42. The rotating dustproof plate 51 drives the first gathering bar 71 and the second gathering bar 72 to rotate between the first limiting ring 41 and the second limiting ring 42.

[0051] When the rotating feed hopper 31 moves to above one of the discharge ports, the aluminum ash slag in the feed hopper 31 passes through the feed port 12 and enters between the grinding hopper 11 and the grinding roller 62, and then the working second motor 61 drives the grinding roller 62 to rotate in the grinding hopper 11, and the rotating grinding roller 62 and the grinding hopper 11 cooperate with each other to grind the aluminum ash slag. During this process, the dust-proof structure formed by the cooperation of the dust-proof plate 51, the first limiting ring 41 and the second limiting ring 42 can block the feed port 12 that does not correspond to the feed hopper 31, and the dust-proof structure formed by the cooperation of the feed hopper 31 and the baffle 52 can block the feed port 12 corresponding to the feed hopper 31, so that the dust generated during the grinding of the aluminum ash slag in the grinding hopper 11 is not easy to float into the external environment through the feed structure;

[0052] At the same time, the rotating first gathering bar 71 can push and gather the aluminum ash slag remaining on the bottom of the feed hopper 31 and the upper surface of the grinding hopper 11 to the middle part thereof, and the rotating second gathering bar 72 can clean and gather the part cleaned by the first gathering bar 71 again. When the rotating first gathering bar 71 and the second gathering bar 72 push the cleaned and gathered aluminum ash slag to move above the feed port 12, the aluminum ash slag can move to between the grinding roller 62 and the grinding hopper 11 through the feed port 12;

[0053] When all the aluminum ash slag in the feed hopper 31 moves into the grinding hopper 11 through the feed port 12, and the feed hopper 31 moves to a position offset from the feed port 12, the baffle 52 can be opened, and then aluminum ash slag is added to the feed hopper 31, and then the first motor 21 is controlled to work again, and the above operation is repeated.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aluminum ash slag metal recovery and processing device, comprising a housing (1), a drive assembly (2), a feed assembly (3) and a limit assembly (4), characterized in that: The housing (1) comprises a grinding bucket (11), a plurality of feed ports (12) are provided on the upper surface of the grinding bucket (11), and a discharge pipe (13) is provided at the bottom of the grinding bucket (11); The driving assembly (2) comprises a first motor (21), the first motor (21) is connected to the back of the grinding bucket (11), the output shaft of the first motor (21) is connected to a rotating shaft (22), the rotating shaft (22) is externally rotatably connected to a bearing seat (23), the bearing seat (23) is connected to the back of the grinding bucket (11), the top of the rotating shaft (22) is connected to a gear (24), and the gear (24) is meshed with a gear ring (25); The feed assembly (3) comprises a feed hopper (31), the two sides of the feed hopper (31) are respectively connected to a first movable block (32) and a second movable block (34), the first movable block (32) is connected to a rotating ring (33), and the first movable block (32) and the rotating ring (33) are connected inside a gear ring (25); The limiting assembly (4) comprises a first limiting ring (41) and a second limiting ring (42), wherein the first limiting ring (41) and the second limiting ring (42) are both connected to the upper surface of the grinding bucket (11), the first movable block (32) and the rotating ring (33) are slidably connected in the first limiting ring (41), and the second movable block (34) is slidably connected in the second limiting ring (42); The feed hopper (31) is connected to a dustproof assembly (5), the dustproof assembly (5) comprises a dustproof plate (51) and a baffle (52), the dustproof plate (51) is connected to the feed hopper (31), and the baffle (52) is hinged to the top of the feed hopper (31) via a hinge; The dustproof plate (51) is overlapped between the first limiting ring (41) and the second limiting ring (42), a plurality of feed ports (12) are arranged between the first limiting ring (41) and the second limiting ring (42), and the dustproof plate (51) and the feed hopper (31) are arranged above the plurality of feed ports (12); A cleaning assembly (7) is provided on the lower surface of the dustproof plate (51), and the cleaning assembly (7) includes a first gathering bar (71) and a second gathering bar (72), wherein the first gathering bar (71) and the second gathering bar (72) are both connected to the lower surface of the dustproof plate (51), and the first gathering bar (71) and the second gathering bar (72) are both overlapped on the upper surface of the grinding bucket (11).

2. The aluminum ash slag metal recovery and processing device according to claim 1 is characterized in that: A grinding assembly (6) is provided in the grinding bucket (11), and the grinding assembly (6) comprises a second motor (61) and a grinding roller (62). The grinding roller (62) is rotatably connected in the grinding bucket (11), the top end of the grinding roller (62) is connected to the second motor (61), the second motor (61) is connected to the upper surface of the grinding bucket (11), and the outer surface of the upper part of the grinding roller (62) is set to be inclined.

3. The aluminum ash slag metal recovery and processing device according to claim 1 is characterized by: The first gathering strip (71) and the second gathering strip (72) are overlapped between the first limiting ring (41) and the second limiting ring (42).

4. The aluminum ash slag metal recovery and processing device according to claim 2 is characterized by: The second movable block (34) is arranged between the second limiting ring (42) and the second motor (61).

Citation Information

Patent Citations

  • Gypsum fine grinding device

    CN217511935U

  • Aluminum ash recycling device

    CN218478792U