A method for preparing recycled aggregate based on construction waste recycling

Abstract

The application discloses a kind of based on construction waste recycling's recycled aggregate preparation method, it is related to building material technical field, including the following steps: construction waste is broken to obtain preliminary aggregate, then separation is carried out by magnetic separation device, remove metal by magnetic separation, avoid subsequent processing equipment to cause damage to aggregate;Preliminary aggregate is broken again, then aggregate is ground and collides;Recycled aggregate is screened according to different particle sizes using vibrating screen, by screening recycled aggregate according to different particle sizes, it is convenient to classify and utilize as needed for different particle sizes of recycled aggregate, reduce waste, improve the market applicability of recycled aggregate;The application also removes metal in aggregate efficiently by the cooperation of magnetic separation device, so that the quality of recycled aggregate prepared by the method is higher.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a method for preparing recycled aggregates based on the reuse of construction waste. Background Technology

[0002] Using construction waste to prepare recycled aggregate is an environmentally friendly and resource-efficient process. However, since construction waste contains a lot of metal, if the metal is not removed, it will affect the quality of the recycled aggregate.

[0003] A magnetic roller separator is a common magnetic sorting device. Its main structure is very similar to that of a conveyor belt assembly, except that one of the conveyor belt's rotating rollers is replaced by a magnetic roller. After the aggregate moves on the conveyor belt to the position of the magnetic roller, the metal will be magnetically attracted and continue to rotate downward along the conveyor belt, while the aggregate will be directly thrown out of the conveyor belt under the action of inertia and gravity, thus achieving the effect of magnetic separation.

[0004] However, this magnetic separation method has certain drawbacks. First, in order to ensure that the magnetic roller can stably attract metal, the overall conveyor speed is relatively slow, and the aggregate is also blocked by the metal. As a result, the aggregate has less kinetic energy when it separates from the conveyor belt, so it cannot be ejected from the conveyor belt. As a result, the aggregate continues to move down with the conveyor belt, and finally, this part of the aggregate and metal are discharged through the same channel, resulting in poor separation effect. Second, current magnetic roller separators cannot guarantee the accumulation thickness of aggregate on the conveyor belt. If the thickness is too small, the working efficiency is poor; if the thickness is too large, the metal cannot be completely separated, reducing the metal removal effect. Summary of the Invention

[0005] The purpose of this invention is to provide a method for preparing recycled aggregates based on the reuse of construction waste, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing recycled aggregate based on the reuse of construction waste, comprising the following steps:

[0007] Step 1: Use a hammer crusher to crush construction waste to obtain preliminary aggregate, and then use a magnetic sorting device to separate the metal from the aggregate;

[0008] Step 2: The initial aggregate is fed into a jaw crusher for further crushing, and then the aggregate is ground and collided by an eccentric rotating device to remove the mortar and cement paste from the surface of the aggregate.

[0009] Step 3:

[0010] Preferably, the magnetic sorting device includes:

[0011] A conveying mechanism for moving preliminary aggregates;

[0012] A first magnetic separation mechanism is connected to a conveying mechanism;

[0013] A power mechanism is used to add kinetic energy to the initial aggregate at the location of the first magnetic separation mechanism;

[0014] The second magnetic separation mechanism is used to perform magnetic separation on the initial aggregate during the conveying process.

[0015] Preferably, the conveying mechanism includes:

[0016] The first magnetic separation mechanism is rotatably disposed inside the housing.

[0017] The first rotating roller is rotatably disposed inside the housing;

[0018] A first conveyor belt is driven between a first rotating roller and a first magnetic separation mechanism.

[0019] Preferably, the first magnetic separation mechanism includes:

[0020] A rotating drum, which is rotatably disposed inside the housing, and a power mechanism disposed inside the rotating drum;

[0021] Magnetic strips are fixedly connected to the inner wall of the rotating drum at intervals;

[0022] The first sliding plate is inclinedly disposed inside the box body;

[0023] The second sliding plate is inclinedly disposed inside the box.

[0024] Preferably, the power mechanism includes:

[0025] The first fixed cylinder is disposed inside the box body and is inserted into the inside of the rotating cylinder. The magnetic strip is disposed between the rotating cylinder and the first fixed cylinder. The outer wall of the first fixed cylinder is provided with a first slot.

[0026] The second fixing cylinder is fixedly connected to the inner wall of the first fixing cylinder, and the outer wall of the second fixing cylinder is provided with a second slot;

[0027] A connecting piece is fixedly connected between the outer wall of the first fixed cylinder and the inner wall of the second fixed cylinder, and the connecting piece is symmetrically arranged on both sides of the first slot and the second slot;

[0028] A connecting hole is provided at intervals on the outer wall of the rotating cylinder, and the position of the connecting hole corresponds to the gap between adjacent magnetic strips.

[0029] A separator bar is fixedly connected between the first fixed cylinder and the second fixed cylinder, and the separator bar divides the space between the first fixed cylinder, the second fixed cylinder and the two connecting pieces into two piston chambers;

[0030] Piston plates are slidably disposed on the inner walls of two piston chambers, and the two piston plates are staggered. One side of each piston plate is disposed on a moving mechanism.

[0031] The first check valve is installed on the inner wall of each of the two piston chambers. The first check valve is used for outside air to enter the piston chamber.

[0032] The second check valve is installed on the outer wall of the second fixed cylinder. The second check valve is used for air in the piston chamber to enter the interior of the second fixed cylinder.

[0033] Preferably, the moving mechanism includes:

[0034] A bidirectional lead screw, wherein the bidirectional lead screw is rotatably disposed inside the piston chamber, and a first connecting mechanism is provided between the bidirectional lead screw and the rotating drum;

[0035] Nut seat, the outer side of the bidirectional lead screw is threaded to the inner wall of the nut seat;

[0036] A connecting pipe, one side of which is fixedly connected to one side of a nut seat, and the other side of which is fixedly connected to one side of a piston plate;

[0037] A limiting plate is fixedly connected to one end of the bidirectional lead screw near the piston plate. The outer wall of the limiting plate has multiple first ball holes, and the inner wall of the first ball hole is movably fitted with a first rolling ball. The outer wall of the first rolling ball is fitted to the inner wall of the connecting pipe.

[0038] Preferably, the first connecting mechanism includes:

[0039] A rotating shaft is fixedly connected to a fixed plate on the inner wall of the first fixed cylinder. The rotating shaft is rotatably inserted and connected to one side of the fixed plate. The end of the bidirectional lead screw away from the piston plate is fixedly connected to one end of the rotating shaft.

[0040] A gear, which is fixedly sleeved on the end of a rotating shaft;

[0041] An internal gear ring is fixedly connected to the inner wall of the rotating cylinder, and the inner wall of the internal gear ring meshes with the outer wall of the gear.

[0042] Preferably, the second magnetic separation mechanism includes:

[0043] A magnetic roller is rotatably connected to the inner wall of the housing. A first servo motor is installed on the outer wall of the housing. The output end of the first servo motor is connected to one end of the magnetic roller. An adjustment mechanism is provided below the magnetic roller.

[0044] A rotating rod is rotatably connected to the inner wall of the housing, and the outer wall of the rotating rod is provided with bristles;

[0045] The first sprocket, the other end of the magnetic roller penetrates the inner wall of the box and is fixedly sleeved with the first sprocket, one end of the rotating rod penetrates the inner wall of the box and is fixedly sleeved with the second sprocket, a chain is connected between the first sprocket and the second sprocket, and a first protective frame is fixedly connected to the outer wall of the box;

[0046] The second rotating roller is symmetrically rotatably connected to the inner wall of the box. A second conveyor belt is connected between the two second rotating rollers. A second connecting mechanism is provided between the second rotating roller and the connecting piece.

[0047] Scrapers, which are fixedly connected at intervals to the outer wall of the second conveyor belt;

[0048] An arc-shaped baffle is fixedly connected to the inner wall of the box.

[0049] The third sliding plate is inclined and fixedly connected to the inner wall of the box.

[0050] Preferably, the adjustment mechanism includes:

[0051] The connecting frame has a sliding groove on the inner wall of the box body, the outer wall of the connecting frame is slidably connected to the inner wall of the sliding groove, the rotating cylinder is rotatably connected to the inner wall of the connecting frame, and the first fixed cylinder is fixedly inserted and connected to the inner wall of the connecting frame.

[0052] A telescopic cylinder is installed at the bottom of the housing, and the output end of the telescopic cylinder passes through the bottom of the housing and is connected to the bottom of the connecting frame in a transmission manner.

[0053] Preferably, the second connecting mechanism includes:

[0054] The second protective frame is fixedly connected to the outer wall of the box;

[0055] The first worm gear, one end of the second roller passes through the inner wall of the housing and is fixedly connected to one side of the first worm gear, the outer wall of the housing is fixedly connected to a first fixing block, the bottom end of the first fixing block is rotatably inserted and connected to a first worm, and the outer wall of the first worm meshes with the outer wall of the first worm gear.

[0056] The second worm gear, one end of the rotating cylinder passes through the inner wall of the connecting frame and the box in sequence and is fixedly connected to one side of the second worm gear, a connecting groove is opened on one side of the box, a second fixing block is fixedly connected to the outer wall of the connecting frame at the position of the connecting groove, a second worm is rotatably connected to the top of the second fixing block, and the outer wall of the second worm gear is meshed with the inner wall of the second worm.

[0057] A connecting cylinder is fixedly connected to the bottom end of the first worm gear. A square hole is opened at the bottom end of the connecting cylinder. A square rod is fixedly connected to the top end of the second worm gear. The square rod is inserted into the inner wall of the square hole. A plurality of second ball holes are opened on the outer wall of the square rod. A second ball is movably engaged in the inner wall of the second ball hole. The outer wall of the second ball is fitted with the inner wall of the square hole.

[0058] The second servo motor is mounted on the top of the second protective frame, and its output end is connected to the top of the first worm gear.

[0059] The technical effects and advantages of this invention are as follows:

[0060] (1) The present invention utilizes the setting of the power mechanism. When the piston plate moves in the piston chamber toward the first one-way valve, the air in the piston chamber enters the second fixed cylinder through the second one-way valve, and then exits through the second slot and the first slot in sequence. Since the position of the first fixed cylinder is fixed, the orientation of the first slot is fixed. The air discharged in the first slot can be discharged through the connecting hole at the corresponding position. Since the first conveyor belt is ventilated, the air can be blown toward the aggregate that is about to be separated from the first conveyor belt on the surface of the first conveyor belt, so that the aggregate is blown and the kinetic energy increases, so that the aggregate can be stably flown out from the surface of the first conveyor belt, avoiding the phenomenon that the aggregate continues to move with the first conveyor belt. Moreover, this blowing force will not affect the metal adsorbed by the magnetic force, thereby ensuring the magnetic separation effect.

[0061] (2) The present invention utilizes the setting of the second magnetic separation mechanism. By blocking the magnetic roller, the thickness of the aggregate passing between the first conveyor belt and the magnetic roller can be limited, so that the aggregate does not move too much to the position of the first magnetic separation mechanism at once, thus ensuring the stable operation of the first magnetic separation mechanism. The magnetic roller rotates counterclockwise, so that when the aggregate passes between the magnetic roller and the first conveyor belt, the metal in the aggregate will be attracted by magnetic force, so that most of the metal can be directly attracted by the magnetic roller. Then, as the magnetic roller rotates counterclockwise, through the connection of the first sprocket, chain and second sprocket, the rotating rod can be rotated counterclockwise. The counterclockwise rotating rod will drive the bristles to rotate counterclockwise, so that the bristles will continuously scrape the outside of the magnetic roller, so that the aggregate attracted by the magnetic roller can be scraped off by the bristles and fall into the first conveyor belt. However, the bristles are soft and sparsely arranged. This design ensures that the brush bristles do not affect the metal adsorbed by the magnetic roller, allowing the metal to pass over the brush bristles as the magnetic roller rotates counterclockwise. When the metal reaches the top of the magnetic roller, the two second rotating rollers drive the second conveyor belt to rotate clockwise. This causes the scraper to scrape the metal adsorbed by the magnetic roller off and onto the arc-shaped baffle. The metal then moves with the second conveyor belt until it reaches above the third sliding plate. Under the influence of gravity, the metal falls off the second conveyor belt and into the third sliding plate before sliding out of the box. The magnetic roller provides initial magnetic separation of the aggregate. Located above the first conveyor belt, the magnetic roller adsorbs the metal at the top of the aggregate pile on the surface of the first conveyor belt. Combined with the first magnetic separation mechanism, the two magnetic separations can stably separate the metal from the aggregate.

[0062] (3) The present invention utilizes the setting of the adjustment mechanism and the second connection mechanism. When the telescopic cylinder works to drive the connecting frame to rise and fall, it can drive the first conveyor belt to rise and fall, thereby adjusting the distance between the first conveyor belt and the magnetic roller, thereby changing the thickness of the material passing through, improving the applicability of the magnetic separation device. At the same time, with the cooperation of the second connection mechanism, the operation of the first magnetic separation mechanism and the second magnetic separation mechanism is not affected, thereby ensuring the stability of the magnetic separation device. Attached Figure Description

[0063] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0064] Figure 2 This is a side cross-sectional view of the present invention.

[0065] Figure 3 This is a front cross-sectional view of the present invention.

[0066] Figure 4 This is a schematic diagram of the front cross-sectional structure of the rotating cylinder of the present invention.

[0067] Figure 5 This is a schematic cross-sectional view of the rotating cylinder of the present invention.

[0068] Figure 6 This is a schematic diagram of the three-dimensional structure of the first fixed cylinder of the present invention.

[0069] Figure 7 For the present invention Figure 4 A magnified schematic diagram of the structure at point A.

[0070] Figure 8 For the present invention Figure 4 A magnified schematic diagram of the structure at point B.

[0071] Figure 9 This is a schematic diagram of the side cross-sectional structure of the first protective frame of the present invention.

[0072] Figure 10 This is a schematic cross-sectional view of the connecting cylinder of the present invention.

[0073] In the diagram: 101, housing; 201, first roller; 202, first conveyor belt; 203, first sliding plate; 204, second sliding plate; 205, rotating drum; 206, magnetic strip; 301, first fixed cylinder; 302, first slot; 303, second fixed cylinder; 304, second slot; 305, connecting piece; 306, connecting hole; 307, partition strip; 308, piston plate; 309, first one-way valve; 310, second one-way valve; 311, double-acting screw; 312, nut seat; 313, connecting pipe; 314, limiting plate; 315, first ball hole; 316, first rolling ball; 317, fixed plate; 318, rotating shaft; 319, gear; 320, internal gear ring; 401, magnetic roller; 40 2. First servo motor; 403. Rotary rod; 404. Brush bristles; 405. First sprocket; 406. Second sprocket; 407. Chain; 408. First protective frame; 501. Second rotating roller; 502. Second conveyor belt; 503. Scraper; 504. Arc-shaped baffle; 505. Third sliding plate; 601. Connecting frame; 602. Telescopic cylinder; 603. Second protective frame; 604. First worm gear; 605. Second worm gear; 606. First fixing block; 607. First worm; 608. Connecting groove; 609. Second fixing block; 610. Second worm; 611. Connecting cylinder; 612. Square hole; 613. Square rod; 614. Second ball hole; 615. Second rolling ball; 616. Second servo motor. Detailed Implementation

[0074] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0075] This invention provides, for example Figures 1-10 The method for preparing recycled aggregate based on the reuse of construction waste, as shown, includes the following steps:

[0076] Step 1: Use a hammer crusher to crush construction waste to obtain preliminary aggregate, and then use a magnetic separator to separate metal from aggregate. Remove metal by magnetic separation to avoid damage to subsequent aggregate processing equipment.

[0077] Step 2: The initial aggregate is fed into a jaw crusher for further crushing, and then the aggregate is ground and collided by an eccentric rotating device to remove the mortar and cement paste from the surface of the aggregate.

[0078] Step 3: Use a vibrating screen to screen the recycled aggregate according to different particle sizes. By screening the recycled aggregate according to different particle sizes, it is convenient to classify and utilize recycled aggregate of different particle sizes as needed, reduce waste, and improve the market applicability of recycled aggregate.

[0079] As a further embodiment of the present invention, the magnetic sorting device includes a conveying mechanism, a first magnetic separation mechanism, a power mechanism, and a second magnetic separation mechanism. The conveying mechanism is used to move the preliminary aggregate. The first magnetic separation mechanism is connected to the conveying mechanism. The power mechanism is used to increase the kinetic energy of the preliminary aggregate at the position of the first magnetic separation mechanism. The second magnetic separation mechanism is used to perform magnetic separation on the preliminary aggregate during the conveying process. The preliminary aggregate is conveyed by the conveying mechanism for magnetic separation. The second magnetic separation mechanism performs initial magnetic separation on the aggregate during the conveying process. The magnetically separated aggregate is then moved by the conveying mechanism to the first magnetic separation mechanism for magnetic separation again. During this magnetic separation process, the power mechanism provides kinetic energy to the aggregate, so that while the metal is adsorbed by the second magnetic separation mechanism, the aggregate can fly out of the conveying mechanism.

[0080] The conveying mechanism includes a housing 101, a first rotating roller 201, and a first conveyor belt 202. A first magnetic separation mechanism is rotatably disposed inside the housing 101. The first rotating roller 201 is rotatably disposed inside the housing 101. The first conveyor belt 202 is driven between the first rotating roller 201 and the first magnetic separation mechanism. A hopper is also provided above the first conveyor belt 202. The aggregate falls onto the surface of the first conveyor belt 202 through the hopper and is then conveyed by the movement of the first conveyor belt 202.

[0081] The first magnetic separation mechanism includes a rotating drum 205, magnetic strips 206, a first sliding plate 203, and a second sliding plate 204. The rotating drum 205 is rotatably disposed inside the housing 101, and the power mechanism is disposed inside the rotating drum 205. The magnetic strips 206 are fixedly connected to the inner wall of the rotating drum 205 at intervals. The first sliding plate 203 is inclinedly disposed inside the housing 101, and the second sliding plate 204 is inclinedly disposed inside the housing 101. When the aggregate on the first conveyor belt 202 moves to the position of the rotating drum 205, the metal... The metal will be attracted by the magnetic force of the magnetic strip 206 and then continue to move along the arc of the outer wall of the rotating drum 205. The aggregate will fall off the first conveyor belt 202 and slide out through the first sliding plate 203. The top of the second sliding plate 204 is in contact with the outer wall of the first conveyor belt 202, so that after the metal separates from the rotating drum 205 as the first conveyor belt 202 moves, even if the metal continues to be attracted to the first conveyor belt 202, it can be scraped off directly by the second sliding plate 204 and then discharged through the second sliding plate 204.

[0082] The power mechanism includes a first fixed cylinder 301, a second fixed cylinder 303, a connecting piece 305, a connecting hole 306, a partition strip 307, a piston plate 308, a first one-way valve 309, and a second one-way valve 310. The first fixed cylinder 301 is disposed inside the housing 101 and is inserted into the rotating cylinder 205. A magnetic strip 206 is disposed between the rotating cylinder 205 and the first fixed cylinder 301. A first slot 302 is formed on the outer wall of the first fixed cylinder 301. The second fixed cylinder 303 is fixedly connected to the inner wall of the first fixed cylinder 301. A second slot 304 is formed on the outer wall of the second fixed cylinder 303. The connecting piece 305 is fixedly connected between the outer wall of the first fixed cylinder 301 and the inner wall of the second fixed cylinder 303. 05 are symmetrically arranged on both sides of the first slot 302 and the second slot 304. Connecting holes 306 are spaced apart on the outer wall of the rotating cylinder 205, with the position of the connecting holes 306 corresponding to the gap between adjacent magnetic strips 206. A separating strip 307 is fixedly connected between the first fixed cylinder 301 and the second fixed cylinder 303, dividing the space between the first fixed cylinder 301, the second fixed cylinder 303, and the two connecting pieces 305 into two piston chambers. Piston plates 308 are slidably disposed on the inner walls of the two piston chambers, with the two piston plates 308 staggered. One side of each piston plate 308 is disposed on the moving mechanism. First one-way valves 309 are respectively installed on the inner walls of the two piston chambers. The first one-way valve 309 allows outside air to enter the piston chamber, and the second one-way valve... 310 is installed on the outer wall of the second fixed cylinder 303. The second one-way valve 310 is used for air in the piston chamber to enter the second fixed cylinder 303. Since the position of the first fixed cylinder 301 is fixed, the opening of the first slot 302 can be fixed in direction. When the piston plate 308 moves in the piston chamber toward the first one-way valve 309, the air in the piston chamber enters the second fixed cylinder 303 through the second one-way valve 310, and then exits through the second slot 304 and the first slot 302 in sequence. Since the position of the first fixed cylinder 301 is fixed, the orientation of the first slot 302 can be fixed. The air discharged from the first slot 302 can be discharged through the corresponding connecting hole 306. Since the first conveyor belt 202 is ventilated, i.e. This allows air to be blown onto the surface of the first conveyor belt 202, where the aggregate is about to separate from the belt. This agitation increases the aggregate's kinetic energy, allowing it to stably fly off the surface of the first conveyor belt 202, preventing it from continuing to move with the belt. This blowing force does not affect the magnetically attracted metal, thus ensuring the magnetic separation effect. Simultaneously, the piston plates 308 in the two piston chambers move alternately. When one piston plate 308 moves in the opposite direction to the first one-way valve 309, the other piston plate 308 moves away from the first one-way valve 309. This movement allows outside air to enter the piston chamber through the first one-way valve 309.This allows the power mechanism to maintain a continuous blowing state, thus ensuring the stability of its operation.

[0083] The moving mechanism includes a bidirectional lead screw 311, a nut seat 312, a connecting pipe 313, and a limiting plate 314. The bidirectional lead screw 311 is rotatably disposed inside the piston chamber. A first connecting mechanism is provided between the bidirectional lead screw 311 and the rotating drum 205. The outside of the bidirectional lead screw 311 is threadedly connected to the inner wall of the nut seat 312. One side of the connecting pipe 313 is fixedly connected to one side of the nut seat 312, and the other side of the connecting pipe 313 is fixedly connected to one side of the piston plate 308. The limiting plate 314 is fixedly connected to the bidirectional lead screw 311 near the piston. At one end of plate 308, the outer wall of the limiting disc 314 is provided with a plurality of first ball holes 315. The inner wall of the first ball hole 315 is movably fitted with a first ball 316. The outer wall of the first ball 316 is fitted against the inner wall of the connecting pipe 313. The first connecting mechanism includes a rotating shaft 318, a gear 319 and an internal gear ring 320. The inner wall of the first fixed cylinder 301 is fixedly connected to a fixed plate 317. The rotating shaft 318 is rotatably inserted and connected to one side of the fixed plate 317. The end of the bidirectional lead screw 311 away from the piston plate 308 is fixedly connected to one end of the rotating shaft 318. The gear 319 is fixedly sleeved on the end of the rotating shaft 318. The internal gear ring 320 is fixedly connected to the inner wall of the rotating cylinder 205, and the inner wall of the internal gear ring 320 meshes with the outer wall of the gear 319. The first fixed cylinder 301 is open at one end, and it remains stationary when the rotating cylinder 205 rotates. When the rotating cylinder 205 rotates, it drives the internal gear ring 320 to rotate, which in turn drives the gear 319 to rotate. The rotation of the gear 319 drives the rotating shaft 318 to rotate, and the rotation of the rotating shaft 318 drives the gear 319 to rotate in both directions. When the lead screw 311 rotates, the bidirectional lead screw 311 can drive the nut seat 312 to move. Through the connection of the connecting pipe 313, the piston plate 308 can move. When the nut seat 312 moves to contact the limit plate 314, the nut seat 312 will automatically move in the opposite direction until the nut seat 312 contacts the fixed plate 317 again. At this time, the nut seat 312 moves in the opposite direction again, so that the unidirectional rotation of the bidirectional lead screw 311 can drive the piston plate 308 to move continuously back and forth, thereby ensuring the stability of the power mechanism.

[0084] The second magnetic separation mechanism includes a magnetic roller 401, a rotating rod 403, a first sprocket 405, a second rotating roller 501, a scraper 503, an arc-shaped baffle 504, and a third sliding plate 505. The magnetic roller 401 is rotatably connected to the inner wall of the housing 101. A first servo motor 402 is installed on the outer wall of the housing 101. The output end of the first servo motor 402 is connected to one end of the magnetic roller 401. An adjustment mechanism is provided below the magnetic roller 401. The rotating rod 403 is rotatably connected to the inner wall of the housing 101. Brush bristles 404 are provided on the outer wall of the rotating rod 403. The other end of the magnetic roller 401 passes through the inner wall of the housing 101 and is fixedly sleeved with the first sprocket 405. One end of the rotating rod 403 passes through the inner wall of the housing 101 and is fixedly sleeved with the second sprocket 405. 06. A chain 407 is connected between the first sprocket 405 and the second sprocket 406. A first protective frame 408 is fixedly connected to the outer wall of the housing 101. The second rollers 501 are symmetrically rotatably connected to the inner wall of the housing 101. A second conveyor belt 502 is connected between the two second rollers 501. A second connecting mechanism is provided between the second rollers 501 and the connecting piece 305. Scrapers 503 are fixedly connected to the outer wall of the second conveyor belt 502 at intervals. An arc-shaped baffle 504 is fixedly connected to the inner wall of the housing 101. A third sliding plate 505 is fixedly connected to the inner wall of the housing 101 at an incline. A magnetic roller 401 is located directly above the middle of the first conveyor belt 202. Through the obstruction of the magnetic roller 401, the material passing through the first conveyor belt 202 can be... The aggregate thickness between 02 and magnetic roller 401 is limited to prevent excessive aggregate from moving to the first magnetic separation mechanism at once, ensuring the stable operation of the first magnetic separation mechanism. Magnetic roller 401 rotates counter-clockwise, causing the metal within the aggregate to be attracted by magnetic force as it passes between magnetic roller 401 and the first conveyor belt 202. This allows most of the metal to be directly adsorbed by magnetic roller 401. As magnetic roller 401 rotates counter-clockwise, the connection between the first sprocket 405, chain 407, and second sprocket 406 causes the rotating rod 403 to rotate counter-clockwise. This counter-clockwise rotation of rod 403 drives the brush bristles 404 to rotate counter-clockwise, causing the bristles to continuously scrape against the outside of magnetic roller 401, thus aggravating the magnetic separation. The aggregate adsorbed by roller 401 can be scraped off by brush bristles 404 and fall into the first conveyor belt 202. However, the brush bristles 404 are soft and sparsely arranged, so they do not affect the metal adsorbed by magnetic roller 401. This allows the metal to pass over the brush bristles 404 as magnetic roller 401 rotates counterclockwise. When the metal reaches the top of magnetic roller 401, the two second rollers 501 drive the second conveyor belt 502 to rotate clockwise. This causes scraper 503 to scrape the metal adsorbed by magnetic roller 401 onto the arc-shaped baffle 504. Then, as the second conveyor belt 502 moves, it carries the metal along with it until it reaches above the third sliding plate 505. Then, under the action of gravity, the metal is removed from the scraper.Metal falls from the second conveyor belt 502 and into the third sliding plate 505 before sliding out of the housing 101. The magnetic roller 401, positioned above the first conveyor belt 202, attracts the metal at the top of the aggregate pile on the surface of the first conveyor belt 202. Combined with the first magnetic separation mechanism, this two-stage magnetic separation ensures stable separation of the metal from the aggregate.

[0085] The adjusting mechanism includes a connecting frame 601 and a telescopic cylinder 602. A groove is formed on the inner wall of the housing 101. The outer wall of the connecting frame 601 is slidably connected to the inner wall of the groove. A rotating drum 205 is rotatably connected to the inner wall of the connecting frame 601. A first rotating roller 201 is also rotatably connected to the inner wall of the connecting frame 601. A first fixed cylinder 301 is fixedly inserted into the inner wall of the connecting frame 601. The telescopic cylinder 602 is installed at the bottom end of the housing 101. The output end of the telescopic cylinder 602 passes through the bottom end of the housing 101 and is connected to the bottom end of the connecting frame 601. When the telescopic cylinder 602 operates, it drives the connecting frame 601 to rise and fall, thereby driving the first conveyor belt 202 to rise and fall, thus adjusting the first conveyor belt 202. The distance between 02 and magnetic roller 401 can be adjusted to change the thickness of the material passing through, thereby improving the applicability of the magnetic separation device. A support plate can be fixed on the inner wall of the connecting frame 601. The support plate is located below the magnetic roller 401. The first conveyor belt 202 passes between the support plate and the magnetic roller 401, thereby avoiding deformation of the first conveyor belt 202 located at the position of the magnetic roller 401. This allows the aggregate to pass stably between the magnetic roller 401 and the first conveyor belt 202 at the required thickness. A venting groove is provided on the outer wall of the housing 101. The position of the venting groove corresponds to the position of the first fixed cylinder 301, allowing outside air to stably enter the piston chamber through the first one-way valve 309.

[0086] The second connecting mechanism includes a second protective frame 603, a first worm gear 604, a second worm gear 605, a connecting cylinder 611, and a second servo motor 616. The second protective frame 603 is fixedly connected to the outer wall of the housing 101. One end of the second rotating roller 501 passes through the inner wall of the housing 101 and is fixedly connected to one side of the first worm gear 604. A first fixing block 606 is fixedly connected to the outer wall of the housing 101. A first worm 607 is rotatably inserted and connected to the bottom end of the first fixing block 606. The outer wall of the first worm 607 meshes with the outer wall of the first worm gear 604. One end of the rotating cylinder 205 passes through the connecting frame 601 and the inner wall of the housing 101 in sequence. The first worm gear 607 is fixedly connected to one side of the second worm wheel 605. A connecting groove 608 is provided on one side of the housing 101. A second fixing block 609 is fixedly connected to the outer wall of the connecting frame 601 at the position of the connecting groove 608. A second worm 610 is rotatably connected to the top of the second fixing block 609. The outer wall of the second worm wheel 605 meshes with the inner wall of the second worm 610. A connecting cylinder 611 is fixedly connected to the bottom end of the first worm 607. A square hole 612 is provided at the bottom end of the connecting cylinder 611. A square rod 613 is fixedly connected to the top end of the second worm 610. The square rod 613 is inserted into the inner wall of the square hole 612. A plurality of second... Two ball holes 614 have a second ball 615 movably mounted on their inner wall. The outer wall of the second ball 615 fits against the inner wall of the square hole 612. A second servo motor 616 is mounted on the top of the second protective frame 603. The output end of the second servo motor 616 is connected to the top of the first worm gear 607. A square rod 613 is inserted into the square hole 612, allowing the first worm gear 607 and the second worm gear 610 to rotate simultaneously. This allows the second servo motor 616 to drive the first worm wheel 604 and the second worm wheel 605 to rotate simultaneously, thus enabling the second roller 501 and the drum 205 to rotate clockwise simultaneously. This design allows for two sets of rotations to be driven by only one device, reducing equipment costs. When the telescopic cylinder 602 operates to raise and lower the connecting frame 601, the square rod 613 can move longitudinally within the square hole 612 without separating from it. This ensures that the first worm gear 607 and the second worm gear 610 can rotate simultaneously. Furthermore, the second ball bearing 615 facilitates smoother movement of the square rod 613 within the square hole 612, ensuring smooth operation of the equipment. The connecting groove 608 prevents the raising and lowering of the connecting frame 601 from being affected, thus ensuring the stable operation of the magnetic sorting device.

[0087] During operation, the first conveyor belt 202 moves the aggregate on it. When the aggregate reaches the position of the magnetic roller 401, it is blocked and passes through the magnetic roller 401 and the first conveyor belt 202 within the thickness limit. Most of the metal in the aggregate is attracted by the magnetic roller 401 and rotates counterclockwise. At the same time, the rotating rod 403 drives the brush 404 to rotate counterclockwise, causing the aggregate attached to the surface of the brush 404 to be scraped back onto the first conveyor belt 202. The metal passes over the brush 404 and continues to rotate upward. At this time, the second rotating roller 501 drives the second conveyor belt 502 to rotate counterclockwise, causing the scraper 503 to scrape the metal attracted by the magnetic roller 401 onto the arc-shaped baffle 504. Then, it moves with the second conveyor belt 502 until it finally falls onto the first conveyor belt 202. The aggregate and some metal on the first conveyor belt 202 continue to move as the aggregate moves to the position of the rotating drum 205. At this point, the metal is attracted by the magnetic force of the magnetic strip 206, causing it to adhere to the outer wall of the first conveyor belt 202 in contact with the rotating drum 205. The metal then continues to rotate with the first conveyor belt 202 until it contacts and is scraped off the second sliding plate 204, and then slides out of the box 101 through the second sliding plate 204. Simultaneously, the rotation of the rotating drum 205 drives the internal gear ring 320 to rotate, which in turn drives the gear 319 to rotate. The rotation of the gear 319 drives the rotating shaft 318 to rotate, which in turn drives the bidirectional lead screw 311 to rotate. The rotation of the bidirectional lead screw 311 drives the nut seat 312 to move. Through the connection of the connecting pipe 313, the piston plate 308 can move. When the nut seat 312 moves to contact the limiting plate 314, it will automatically move in the opposite direction until it contacts the fixed plate 317 again. At this point, the nut seat 312 moves in the opposite direction again, thus allowing the unidirectional rotation of the bidirectional lead screw 311 to drive the piston plate 308 to move continuously back and forth. When the piston plate 308 moves towards the first one-way valve 309 within the piston chamber, the air in the piston chamber enters the second fixed cylinder 303 through the second one-way valve 310, and then exits sequentially through the second slot 304 and the first slot 302. Because the first fixed... With the cylinder 301 fixed in position, the orientation of the first slot 302 is fixed. The air discharged from the first slot 302 can be discharged through the corresponding connecting hole 306. Since the first conveyor belt 202 is ventilated, the air will blow towards the aggregate that is about to separate from the first conveyor belt 202, causing the aggregate to be blown and increasing its kinetic energy. This allows the aggregate to stably fly out from the surface of the first conveyor belt 202 and then fall onto the first sliding plate 203 and slide out of the box 101. The first servo motor 402, the telescopic cylinder 602 and the second servo motor 616 are electrically connected to an external power supply through external switches, which facilitates the operator's control and improves the safety and convenience of operation.

[0088] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing recycled aggregate based on the reuse of construction waste, characterized in that, Includes the following steps: Step 1: Use a hammer crusher to crush construction waste to obtain preliminary aggregate, and then use a magnetic sorting device to separate the metal from the aggregate; Step 2: The initial aggregate is fed into a jaw crusher for further crushing, and then the aggregate is ground and collided by an eccentric rotating device to remove the mortar and cement paste from the surface of the aggregate. Step 3: Use a vibrating screen to screen the recycled aggregate according to different particle sizes; The magnetic sorting device includes: A conveying mechanism for moving preliminary aggregates; A first magnetic separation mechanism is connected to a conveying mechanism; A power mechanism is used to add kinetic energy to the initial aggregate at the location of the first magnetic separation mechanism; The second magnetic separation mechanism is used to perform magnetic separation on the preliminary aggregates during the conveying process; The conveying mechanism includes: The first magnetic separation mechanism is rotatably disposed inside the housing (101); The first rotating roller (201) is rotatably disposed inside the housing (101); The first conveyor belt (202) is driven between the first rotating roller (201) and the first magnetic separation mechanism; The first magnetic separation mechanism includes: Rotary drum (205), which is rotatably disposed inside the housing (101), and the power mechanism is disposed inside the rotary drum (205); Magnetic strips (206) are fixedly connected to the inner wall of the rotating drum (205) at intervals; The first sliding plate (203) is inclinedly disposed inside the housing (101); The second sliding plate (204) is inclinedly disposed inside the housing (101); The power mechanism includes: The first fixed cylinder (301) is disposed inside the box body (101). The first fixed cylinder (301) is inserted into the inside of the rotating cylinder (205). The magnetic strip (206) is disposed between the rotating cylinder (205) and the first fixed cylinder (301). The outer wall of the first fixed cylinder (301) is provided with a first slot (302). The second fixing cylinder (303) is fixedly connected to the inner wall of the first fixing cylinder (301), and the outer wall of the second fixing cylinder (303) is provided with a second slot (304). A connecting piece (305) is fixedly connected between the outer wall of the first fixed cylinder (301) and the inner wall of the second fixed cylinder (303). The connecting piece (305) is symmetrically arranged on both sides of the first slot (302) and the second slot (304). A connecting hole (306) is provided at intervals on the outer wall of the rotating cylinder (205), and the position of the connecting hole (306) corresponds to the gap between adjacent magnetic strips (206); A partition strip (307) is fixedly connected between the first fixed cylinder (301) and the second fixed cylinder (303). The partition strip (307) divides the space between the first fixed cylinder (301), the second fixed cylinder (303) and the two connecting pieces (305) into two piston chambers. Piston plate (308), the piston plate (308) is slidably disposed on the inner wall of the two piston chambers respectively, the two piston plates (308) are staggered, and one side of the piston plate (308) is disposed on the moving mechanism; The first check valve (309) is installed on the inner wall of the two piston chambers respectively. The first check valve (309) is used for outside air to enter the piston chamber. The second check valve (310) is installed on the outer wall of the second fixed cylinder (303). The second check valve (310) is used for air in the piston chamber to enter the interior of the second fixed cylinder (303).

2. The method for preparing recycled aggregate based on the reuse of construction waste according to claim 1, characterized in that, The moving mechanism includes: A bidirectional lead screw (311) is rotatably disposed inside the piston chamber, and a first connecting mechanism is provided between the bidirectional lead screw (311) and the rotating drum (205); Nut seat (312), the outside of the bidirectional lead screw (311) is threaded to the inner wall of the nut seat (312); A connecting pipe (313) is fixedly connected to one side of a nut seat (312) on one side, and the other side of the connecting pipe (313) is fixedly connected to one side of a piston plate (308). A limiting plate (314) is fixedly connected to one end of the bidirectional lead screw (311) near the piston plate (308). The outer wall of the limiting plate (314) is provided with a plurality of first ball holes (315). The inner wall of the first ball hole (315) is movably fitted with a first ball (316). The outer wall of the first ball (316) is fitted with the inner wall of the connecting pipe (313).

3. The method for preparing recycled aggregate based on the reuse of construction waste according to claim 2, characterized in that, The first connecting mechanism includes: A rotating shaft (318) is fixedly connected to a fixing plate (317) on the inner wall of the first fixing cylinder (301). The rotating shaft (318) is rotatably inserted and connected to one side of the fixing plate (317). The end of the bidirectional screw (311) away from the piston plate (308) is fixedly connected to one end of the rotating shaft (318). Gear (319), which is fixedly sleeved on the end of the rotating shaft (318); An internal gear ring (320) is fixedly connected to the inner wall of a rotating cylinder (205). The rotation of the rotating cylinder (205) can drive the internal gear ring (320) to rotate. The inner wall of the internal gear ring (320) meshes with the outer wall of the gear (319).

4. The method for preparing recycled aggregate based on the reuse of construction waste according to claim 3, characterized in that, The second magnetic separation mechanism includes: A magnetic roller (401) is rotatably connected to the inner wall of the housing (101). A first servo motor (402) is installed on the outer wall of the housing (101). The output end of the first servo motor (402) is connected to one end of the magnetic roller (401). An adjustment mechanism is provided below the magnetic roller (401). Rotating rod (403), the rotating rod (403) is rotatably connected to the inner wall of the box (101), and the outer wall of the rotating rod (403) is provided with bristles (404). The first sprocket (405) is connected to the magnetic roller (401) through the inner wall of the housing (101) and fixedly sleeved with the first sprocket (405). One end of the rotating rod (403) is connected to the inner wall of the housing (101) and fixedly sleeved with the second sprocket (406). A chain (407) is connected between the first sprocket (405) and the second sprocket (406). A first protective frame (408) is fixedly connected to the outer wall of the housing (101). The second rotating roller (501) is symmetrically rotatably connected to the inner wall of the box (101). A second conveyor belt (502) is connected between the two second rotating rollers (501). A second connecting mechanism is provided between the second rotating roller (501) and the connecting piece (305). Scraper (503), the scraper (503) is fixedly connected to the outer wall of the second conveyor belt (502) at intervals; An arc-shaped baffle (504) is fixedly connected to the inner wall of the box (101); The third sliding plate (505) is inclined and fixedly connected to the inner wall of the box (101).

5. A method for preparing recycled aggregate based on the reuse of construction waste according to claim 4, characterized in that, The adjustment mechanism includes: The inner wall of the box (101) is provided with a sliding groove, the outer wall of the connecting frame (601) is slidably connected to the inner wall of the sliding groove, the rotating cylinder (205) is rotatably connected to the inner wall of the connecting frame (601), and the first fixed cylinder (301) is fixedly inserted and connected to the inner wall of the connecting frame (601). Telescopic cylinder (602) is installed at the bottom of the housing (101). The output end of the telescopic cylinder (602) passes through the bottom of the housing (101) and is connected to the bottom of the connecting frame (601) in a transmission manner.

6. The method for preparing recycled aggregate based on the reuse of construction waste according to claim 5, characterized in that, The second connecting mechanism includes: The second protective frame (603) is fixedly connected to the outer wall of the box (101); The first worm gear (604) and the second roller (501) have one end that penetrates the inner wall of the housing (101) and are fixedly connected to one side of the first worm gear (604). The outer wall of the housing (101) is fixedly connected to a first fixing block (606). The bottom end of the first fixing block (606) is rotatably connected to a first worm (607). The outer wall of the first worm (607) meshes with the outer wall of the first worm gear (604). The second worm gear (605) has one end of the rotating cylinder (205) passing through the inner wall of the connecting frame (601) and the housing (101) in sequence and being fixedly connected to one side of the second worm gear (605). A connecting groove (608) is provided on one side of the housing (101). A second fixing block (609) is fixedly connected to the outer wall of the connecting frame (601) at the position of the connecting groove (608). A second worm (610) is rotatably connected to the top of the second fixing block (609). The outer wall of the second worm gear (605) meshes with the inner wall of the second worm (610). A connecting cylinder (611) is fixedly connected to the bottom end of the first worm (607). A square hole (612) is opened at the bottom end of the connecting cylinder (611). A square rod (613) is fixedly connected to the top end of the second worm (610). The square rod (613) is inserted into the inner wall of the square hole (612). A plurality of second ball holes (614) are opened on the outer wall of the square rod (613). A second ball (615) is movably locked in the inner wall of the second ball hole (614). The outer wall of the second ball (615) is fitted with the inner wall of the square hole (612). The second servo motor (616) is mounted on the top of the second protective frame (603), and the output end of the second servo motor (616) is connected to the top of the first worm gear (607) for transmission.

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