Aluminum slag recovery system and method

Abstract

The present invention discloses an aluminum slag recycling system, comprising a cleaning device, a crushing device, and a screening device connected in sequence, wherein the cleaning device, the crushing device, and the screening device are used to transport aluminum slag through a conveying device, and the aluminum slag is sequentially cleaned, crushed, and screened. The cleaning device comprises a cylinder, a screen drum, a rotating shaft, a stirring rod, a driving device, a first thrust bearing, a bracket, and a flushing pipe. The bracket is installed at the bottom of the cylinder, and the lower end of the screen drum is rotatably connected to the bracket through the first thrust bearing; the upper part of the rotating shaft is rotatably connected to the cylinder through a positioning bearing, and extends out of the cylinder, and the lower part extends into the screen drum; the two ends of the stirring rod are respectively fixed to the rotating shaft and the side wall of the screen drum; the flushing pipe sprays a water column into the inside of the screen drum; the driving device and the rotating shaft are linked. The present invention has the advantages of novel structure, excellent cleaning effect, high recovery rate, clean and environmental protection.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum secondary utilization, and in particular to a system and method for recovering aluminum from aluminum slag. Background Art

[0002] The demand for aluminum and aluminum alloys in modern society is increasing. Aluminum and aluminum alloys are widely used in the fields of construction, aviation, power transmission, automobile manufacturing, household appliances, etc. With the rapid development of aluminum alloy deep processing enterprises, aluminum alloy processing enterprises produce a large amount of waste aluminum slag in the process of aluminum alloy smelting. Aluminum slag is an important secondary aluminum resource, in which the content of metal aluminum reaches 20% to 60%. These waste aluminum slags are usually treated as industrial waste by enterprises, which not only pollutes the environment but also causes great waste of resources. Even if some enterprises recycle waste aluminum slags, they still have a series of problems such as immature technology, low recovery rate and secondary pollution.

[0003] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0004] The purpose of the present invention is to provide a system and method for recovering aluminum from aluminum slag which has a novel structure, good cleaning effect, high recovery rate, and is clean and environmentally friendly.

[0005] To this end, the present invention proposes a system and method for recovering aluminum from aluminum slag.

[0006] Preferably, the present invention may also have the following technical features:

[0007] A system for recovering aluminum from aluminum slag comprises a cleaning device, a crushing device, and a screening device which are connected in sequence, wherein the cleaning device, the crushing device, and the screening device are used to transport aluminum slag through a conveying device, and the aluminum slag is sequentially cleaned, crushed, and screened. The cleaning device comprises a cylinder, a screen drum, a rotating shaft, a stirring rod, a driving device, a first thrust bearing, a bracket, and a flushing pipe. The bracket is mounted on the bottom of the cylinder, and the lower end of the screen drum is rotatably connected to the bracket through a first thrust bearing; the upper part of the rotating shaft is rotatably connected to the cylinder through a positioning bearing and extends out of the cylinder, and the lower part extends into the screen drum; the two ends of the stirring rod are respectively fixed to the rotating shaft and the side wall of the screen drum; the flushing pipe sprays a water column into the interior of the screen drum; the driving device and the rotating shaft are linked.

[0008] Furthermore, it also includes a coupling, the rotating shaft is provided with a center hole as a longitudinal water supply channel, the stirring rod is provided with a center hole as a transverse water supply channel, the longitudinal water supply channel and the transverse water supply channel are connected, and the longitudinal water supply channel and the transverse water supply channel are respectively provided with a transverse water outlet hole and a longitudinal water outlet hole.

[0009] Furthermore, the longitudinal water outlet hole is opened downward; the coupling is installed on the top of the rotating shaft, the lower end of the coupling is connected to the rotating shaft, and the upper end is connected to the flushing pipe.

[0010] Furthermore, the coupling is replaced with a second thrust bearing; the second thrust bearing is fixed to the upper end of the rotating shaft, and the seal is performed well, and the flushing pipe is connected to the sealing space of the second thrust bearing.

[0011] Furthermore, it also includes a diverter plate and a motor. The discharge pipe arranged at the lower part of the screen cylinder is an inverted "Y"-shaped structure, which includes a main pipe, a solid material pipe, and a discharge pipe. The diverter plate is arranged inside the discharge pipe and is driven to rotate by a motor to change whether the main pipe is connected to the solid material pipe or the discharge pipe.

[0012] Furthermore, it also includes a cylinder, a second bearing, a limit block, and a second rotating shaft. One end of the second rotating shaft is linked to the motor, and the diverter plate is fixed along a generatrix of the cylinder; the cylinder is installed on the other end of the second rotating shaft through the second bearing, and the limit blocks are provided at both ends of the cylinder, and the two limit blocks are arranged at a certain distance; the second rotating shaft is provided with a toggle rod, and the upper part of the toggle rod is located between the two limit blocks.

[0013] Furthermore, a discharge port is provided on the side below the screen drum, and a door panel is provided outside the discharge port; the door panel is hinged on the screen drum and is provided with a torsion spring so that the door panel has a tendency to close the discharge port.

[0014] Furthermore, the door panel comprises a stainless steel plate and a soft plastic plate, one end of the stainless steel plate is hinged to the screen drum, and the other end is fixed to the soft plastic plate, and at least 1 / 4 of the discharge port is covered by the soft plastic plate.

[0015] Furthermore, a plurality of annular impact blocks are provided inside the cylinder body and correspond to the positions of the discharge ports.

[0016] An aluminum slag recovery method including the above-mentioned aluminum slag recovery system comprises the following steps:

[0017] First, the aluminum slag is transported to the cleaning device by a screw feeder for primary cleaning. During feeding, the flushing pipe is kept filled with water.

[0018] Then, the aluminum slag after the first cleaning is soaked in hydrochloric acid until obvious bubbles appear on the surface of the aluminum slag, and the aluminum slag is picked up and rinsed;

[0019] The washed aluminum slag is then transported to the cleaning device for secondary cleaning, and the position of the diverter plate is adjusted according to the water inflow / outflow status of the flushing pipe;

[0020] Finally, the aluminum slag after secondary cleaning is transferred to the crushing device by a conveyor belt for crushing, and then sorted by a screening device.

[0021] Compared with the prior art, the beneficial effects of the present invention include: after the aluminum slag passes through the cleaning device, the dust and aluminum ash on the surface are recovered together with water into the sedimentation tank, and the entire recycling process basically generates no dust, which is clean and environmentally friendly, and protects the health of workers. The first thrust bearing is used as a support to reduce the pressure on the positioning bearing, making the shaft work more reliable and stable. The flushing pipe is connected to the shaft through a coupling, and the relative rotation of the flushing pipe and the shaft does not interfere with each other, that is, the shaft cannot drive the flushing pipe to rotate, thereby ensuring the flushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the cleaning device of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the present invention.

[0024] Figure 3 It is a schematic diagram of the installation of the manifold of the present invention.

[0025] Figure 4 It is a partial view of the screen drum of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with specific implementations and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its application.

[0027] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts unless otherwise specifically stated.

[0028] like Figures 1 to 4The aluminum slag recovery system shown in the figure comprises a cleaning device 100, a crushing device 200, and a screening device 400 connected in sequence. The cleaning device 100, the crushing device 200, and the screening device 400 are used to transport aluminum slag through a conveying device 17, and the aluminum slag is sequentially cleaned, crushed, and screened. The cleaning device 100 comprises a cylinder 1, a screen drum 23, a rotating shaft 5, a stirring rod 7, a driving device 4, a first thrust bearing 15, a bracket 14, and a flushing pipe 2. The bracket 14 is installed at the bottom of the cylinder 1, and the lower end of the screen drum 23 is rotatably connected to the bracket 14 through the first thrust bearing 15. The rotating shaft 5 is rotatably connected to the upper part of the cylinder 1 through a positioning bearing 6, and its upper part extends out of the cylinder 1, and its lower part extends into the screen drum 23. The two ends of the stirring rod 7 are respectively welded and fixed to the rotating shaft 5 and the side wall of the screen drum 23. The flushing pipe 2 sprays a high-pressure water column from the feed port at the upper part of the cylinder 1 to the inside of the screen drum 23 to clean the dust on the surface of the aluminum slag. The driving device 4 is linked with the rotating shaft 5. The first thrust bearing 15 is used as a support to reduce the pressure of the positioning bearing 6, so that the rotating shaft 5 works more reliably and stably. The side wall of the screen cylinder 23 is provided with a plurality of perforations 24. The aluminum slag is hit by the stirring rod 7, which can not only break the aluminum slag, but also loosen the aluminum slag in the screen cylinder 23 for easy cleaning. Microparticles and water fly out of the perforations 24 of the screen cylinder 23 by centrifugation, and flow out of the cylinder 1 from the discharge pipe at the bottom of the cylinder 1.

[0029] A further improvement of the above technical solution further includes a coupling 3, the rotating shaft 5 is provided with a center hole as a longitudinal water supply channel 52, the stirring rod 7 is provided with a center hole as a transverse water supply channel 72, the longitudinal water supply channel 52 and the transverse water supply channel 72 are connected, and the longitudinal water supply channel 52 and the transverse water supply channel 72 are respectively provided with a transverse water outlet hole 51 and a longitudinal water outlet hole 71. Furthermore, the longitudinal water outlet hole 71 is opened downward. The coupling 3 is installed on the top of the rotating shaft 5, and its lower end is connected to the rotating shaft 5, and the upper end is connected to the flushing pipe 2. The flushing pipe 2 is connected to the rotating shaft 5 through the coupling 3, and the relative rotation of the flushing pipe 2 and the rotating shaft 5 does not interfere with each other, that is, the rotating shaft 5 cannot drive the flushing pipe 2 to rotate. When it is necessary to clean the aluminum slag, water flows through the flushing pipe into the coupling 3, enters the longitudinal water supply channel 52 and the transverse water supply channel 72, and then sprays out from the transverse water outlet hole 51 and the longitudinal water outlet hole 71. Water outlet holes are provided on the rotating shaft 5 and the stirring rod 7, so that the cleaning of the aluminum slag is more efficient and the effect is better.

[0030] In an optional embodiment, the coupling 3 can also be replaced by a second thrust bearing. The second thrust bearing is fixed to the upper end of the rotating shaft 5, sealed, and then the flushing pipe is connected to the sealed space of the second thrust bearing, so that water can be supplied to the interior.

[0031] In a preferred embodiment, a diverter plate 13 and a motor are further included. The discharge pipe disposed at the bottom of the screen cylinder 23 is an inverted "Y" shaped structure, which includes a main pipe 10, a solid material pipe 11, and a liquid discharge pipe 12. The diverter plate 13 is disposed inside the discharge pipe and is driven to rotate by a motor to determine whether the main pipe 10 is connected to the solid material pipe 11 or the liquid discharge pipe 12. When water flows into the flushing pipe 2, the motor drives the diverter plate 13 to block the solid material pipe 11, and the liquid flows out into the liquid discharge pipe 12 through the main pipe 10 and flows into the sedimentation tank 300. When water stops flowing into the flushing pipe 2, the motor drives the diverter plate 13 to block the liquid discharge pipe 12, and the solid particles enter the solid material pipe 11 through the main pipe, and then are transferred to the next process through the conveyor belt.

[0032] Specifically, it also includes a cylinder 18, a second bearing 27, a stopper, and a second rotating shaft 22. One end of the second rotating shaft 22 is linked to the motor. The diverter plate 13 is fixed along a generatrix of the cylinder 18. The cylinder 18 is mounted on the other end of the second rotating shaft 22 through the second bearing 27. The stopper is provided at both ends of the cylinder 18, and the two stopper blocks are arranged at a certain distance. The second rotating shaft 22 is provided with a toggle rod 21, and the upper part of the toggle rod 21 is located between the two stopper blocks. When the second rotating shaft 22 rotates clockwise, it contacts the first limit block 19, and moves the cylinder 18 to rotate a certain angle and then stops. At this time, the diverter plate 13 has a tendency to rotate clockwise on the right side in the vertical direction, and abuts against the discharge pipe 12 after rotating freely. At this time, the second limit block 20 approaches the toggle rod 21; in this case, the motor rotates counterclockwise, and the toggle rod 21 contacts the second limit block 20 and rotates a certain angle to reset (the toggle rod 21 is in the reset state when it is vertical). At this time, the diverter plate 13 has a tendency to rotate counterclockwise on the left side in the vertical direction, and abuts against the solid material pipe 11 after rotating freely. In this embodiment, the diverter plate 13 is first rotated by the motor to rotate a certain angle, and then the center of gravity of the diverter plate 13 is offset to realize the automatic rotation of the diverter plate 13 to prevent the solid material pipe 11 or the discharge pipe 12 from deforming. The motor cannot directly drive the diverter plate 13 to the predetermined position, causing motor loss, thereby effectively protecting the motor.

[0033] A discharge port is provided on the side below the sieve drum 23, and a door panel is provided outside the discharge port. The door panel is hinged on the sieve drum 23 and is provided with a torsion spring so that the door panel has a tendency to close the discharge port. When cleaning, the rotating shaft 5 rotates slowly, the centrifugal force of the aluminum slag is small, and it is difficult for the aluminum slag to push open the door panel; when discharging, the rotating shaft 5 rotates at a higher speed to increase the centrifugal force of the aluminum slag, so that the aluminum slag can push open the door panel to achieve discharging.

[0034] Preferably, the door panel includes a stainless steel plate 25 and a soft plastic plate 26, one end of the stainless steel plate 25 is hinged to the screen drum 23, and the other end is fixed to the soft plastic plate 26, and at least 1 / 4 of the discharge port is covered by the soft plastic plate 26. By providing the soft plastic plate 26, the difficulty of discharging aluminum slag is reduced.

[0035] Furthermore, a plurality of annular impact blocks 9 are arranged inside the cylinder 1, and the positions of the impact blocks 9 correspond to the positions of the discharge ports. Thus, when the aluminum slag is centrifuged out of the screen cylinder, it hits the impact blocks 9, which strikes the aluminum slag and protects the cylinder 1.

[0036] A second vibrating screen is added between the discharge pipe and the sedimentation tank to separate the aluminum slag from the solid and liquid when the water flows into the flushing pipe.

[0037] An aluminum slag recovery method including the above-mentioned aluminum slag recovery system comprises the following steps:

[0038] First, the aluminum slag is transported to the cleaning device 100 by a screw feeder for primary cleaning. During the feeding, the flushing pipe 2 keeps water flowing in. The position of the diverter plate 13 is adjusted according to the water flowing / water stopping state of the flushing pipe 2.

[0039] Then, the aluminum slag after the first cleaning is soaked in hydrochloric acid until obvious bubbles appear on the surface of the aluminum slag, and the aluminum slag is picked up and rinsed;

[0040] The washed aluminum slag is then transported to the cleaning device 100 for secondary cleaning, and the position of the diverter plate 13 is adjusted according to the water inflow / outflow state of the flushing pipe 2;

[0041] Finally, the aluminum slag after the secondary cleaning is transferred to the crushing device 200 by a conveyor belt for crushing, and then sorted by a screening device 400.

[0042] Those skilled in the art will appreciate that numerous variations to the above description are possible, and that the examples and figures are intended only to describe one or more specific implementations.

[0043] Although what is considered as exemplary embodiments of the present invention has been described and described, it will be understood by those skilled in the art that various changes and substitutions may be made thereto without departing from the spirit of the present invention. In addition, many modifications may be made to adapt specific situations to the teachings of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but the present invention may also include all embodiments and their equivalents that fall within the scope of the present invention.

Claims

1. An aluminum slag recovery system, comprising a cleaning device, a crushing device, and a screening device connected in sequence, wherein the cleaning device, the crushing device, and the screening device are connected by a conveying device to transport the aluminum slag, and the aluminum slag is sequentially cleaned, crushed, and screened, characterized in that: The cleaning device comprises a cylinder, a screen drum, a rotating shaft, a stirring rod, a driving device, a first thrust bearing, a bracket, and a flushing pipe. The bracket is installed at the bottom of the cylinder, and the lower end of the screen drum is rotatably connected to the bracket through the first thrust bearing; the upper part of the rotating shaft is rotatably connected to the cylinder through a positioning bearing and extends out of the cylinder, and the lower part extends into the screen drum; the two ends of the stirring rod are respectively fixed to the rotating shaft and the side wall of the screen drum; the flushing pipe sprays a water column into the screen drum; the driving device and the rotating shaft are linked; It also includes a splitter plate and a motor. The discharge pipe arranged at the bottom of the screen cylinder is an inverted "Y"-shaped structure, which includes a main pipe, a solid material pipe, and a liquid discharge pipe. The splitter plate is arranged inside the discharge pipe and is driven to rotate by the motor to change whether the main pipe is connected to the solid material pipe or the liquid discharge pipe. It also includes a cylinder, a second bearing, a stopper, and a second rotating shaft. One end of the second rotating shaft is linked to the motor, and the diverter plate is fixed along a generatrix of the cylinder. The cylinder is mounted on the other end of the second rotating shaft through the second bearing, and the stopper is provided at both ends of the cylinder, and the two stopper blocks are arranged at a certain distance. The second rotating shaft is provided with a toggle rod, and the upper part of the toggle rod is located between the two stopper blocks. A discharge port is provided on the side below the screen drum, and a door panel is provided outside the discharge port; the door panel is hinged on the screen drum and is provided with a torsion spring so that the door panel has a tendency to close the discharge port.

2. The aluminum slag recovery system according to claim 1, characterized in that: It also includes a coupling, the rotating shaft is provided with a center hole as a longitudinal water supply channel, the stirring rod is provided with a center hole as a transverse water supply channel, the longitudinal water supply channel and the transverse water supply channel are connected, and the longitudinal water supply channel and the transverse water supply channel are respectively provided with a transverse water outlet hole and a longitudinal water outlet hole.

3. The aluminum slag recovery system according to claim 2, characterized in that: The longitudinal water outlet hole is opened downward; the coupling is installed on the top of the rotating shaft, the lower end of the coupling is connected to the rotating shaft, and the upper end is connected to the flushing pipe.

4. The aluminum slag recovery system according to claim 2, characterized in that: The coupling is replaced with a second thrust bearing; the second thrust bearing is fixed to the upper end of the rotating shaft, a good seal is made, and the flushing pipe is connected with the sealing space of the second thrust bearing.

5. The aluminum slag recovery system according to claim 1, characterized in that: The door panel comprises a stainless steel plate and a soft plastic plate. One end of the stainless steel plate is hinged to the screen drum, and the other end is fixed to the soft plastic plate. At least 1 / 4 of the discharge port is covered by the soft plastic plate.

6. The aluminum slag recovery system according to claim 1, characterized in that: A plurality of annular impact blocks are arranged inside the cylinder and correspond to the positions of the discharge ports.

7. An aluminum slag recovery method comprising the aluminum slag recovery system according to claim 1, characterized in that: The steps include: First, the aluminum slag is transported to the cleaning device by a screw feeder for primary cleaning. During feeding, the flushing pipe is kept filled with water. Then, the aluminum slag after the first cleaning is soaked in hydrochloric acid until obvious bubbles appear on the surface of the aluminum slag, and the aluminum slag is picked up and rinsed; The washed aluminum slag is then transported to the cleaning device for secondary cleaning, and the position of the diverter plate is adjusted according to the water inflow / outflow status of the flushing pipe; Finally, the aluminum slag after secondary cleaning is transferred to the crushing device by a conveyor belt for crushing, and then sorted by a screening device.

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