Waste building concrete material separation and recycling system and processing technology

Abstract

The application relates to the recycling field and discloses a waste building concrete material separation and recycling system and a processing technology, which comprises an impact crushing and screening unit, the impact crushing and screening unit comprises a processing barrel, a stamping part, a grinding part and a screening part, and the stamping part, the grinding part and the screening part are sequentially arranged in the processing barrel from top to bottom; a metal identification and separation unit, the metal identification and separation unit comprises a metal detector and a locally tiltable conveying belt, the metal detector is vertically opposite to the upper surface of the conveying belt; and an aggregate recycling unit, the aggregate recycling unit is in communication with the screening part. The scheme realizes rapid screening and recycling of recycled aggregates formed by concrete; while the screening and recycling of the aggregates are completed, non-metal solid waste and metal waste which are difficult to form the recycled aggregates can be subjected to metal identification and separation treatment.

Description

Technical Field

[0001] This invention relates to the field of recycling technology, and in particular to a system and process for separating and recycling waste building concrete materials. Background Technology

[0002] Waste building concrete materials mainly consist of gravel or crushed stone, sand or fine sand, and silicate cement. These materials form concrete during the hydration and hardening process. Waste concrete may also contain other impurities such as reinforcing steel bars, wood blocks, plastic fragments, glass, and building plaster. By recycling waste concrete and converting it into recycled aggregates and recycled cement, recycled concrete can be produced. Other materials in waste building concrete materials can also be recycled and reused. This not only reduces carbon dioxide emissions from the production of new building materials and related processes but also helps maintain the ecological environment and alleviate environmental pressure.

[0003] The current processing of waste construction concrete materials typically involves multiple steps, including demolition, crushing, transportation, screening, and washing. During the crushing, transportation, screening, and washing stages, simple crushing, screening, and washing processes often fail to separate the concrete from the reinforcing steel, resulting in impurities during separation. This hinders the reuse of the reinforcing steel in the next recycling stage, leading to residual steel affecting the grinding or pulverizing of the concrete in subsequent processing steps. This reduces the lifespan of grinding and pulverizing equipment, resulting in higher processing costs. Furthermore, it presents significant obstacles to the reuse of these materials in subsequent construction projects. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a waste building concrete material separation and recycling system and processing technology to solve the problem that it is difficult to separate concrete and steel bars through simple crushing, screening and washing, and the separation process is not pure enough.

[0005] To achieve the above objectives, the basic solution of the present invention is as follows: a waste building concrete material separation and recycling system, comprising:

[0006] The impact crushing and screening unit includes a processing barrel, a stamping section, a grinding section, and a screening section, which are arranged sequentially from top to bottom inside the processing barrel.

[0007] The metal identification and sorting unit includes a metal detector and a partially tiltable conveyor belt, with the metal detector and the upper surface of the conveyor belt facing each other vertically.

[0008] The aggregate recycling unit is connected to the screening unit.

[0009] The technical principle of this invention is as follows: the impact crushing and screening unit can sequentially process waste building concrete materials through impact crushing, grinding, and screening. After completing the above processing, the recycled aggregate formed by the concrete can be recovered. The aggregate recovery unit cooperates with the screening unit to achieve rapid screening and recovery of the recycled aggregate formed by the concrete. While completing the screening and recovery of aggregate, it can perform metal identification and sorting processing on non-metallic solid waste and metal waste that are difficult to form recycled aggregate. During sorting, non-metallic solid waste and metal waste are transferred to the rotating belt. When the metal detector detects metal waste, the conveyor belt can be tilted locally. This part of the metal waste containing some non-metallic solid waste can be transferred again and dispersed on the conveyor belt for metal identification and sorting processing again, improving the final sorting accuracy of metal waste, reducing the difficulty and cost of subsequent processing of non-metallic solid waste and metal waste, and the entire metal identification and sorting process is simple and convenient to operate, with low sorting cost, reducing the overall processing cost and difficulty of waste building concrete materials.

[0010] Furthermore, the stamping section includes:

[0011] A rotatable stamping cylinder has a stamping cavity coaxially arranged inside the top of the stamping cylinder, and a stamping plate is located inside the stamping cavity of the stamping cylinder. The upper surface of the stamping plate is provided with a first stamping tooth.

[0012] The press plate is adjustable, and the lower side of the press cylinder is provided with a transfer chamber that communicates with the grinding part. The press plate has a first filter hole that vertically connects the press chamber and the transfer chamber.

[0013] A vertically movable punch head, which can be moved into the punching chamber and has a second punch tooth fixedly provided on its lower surface that can abut against the first punch tooth.

[0014] With the above configuration, the stamping chamber and stamping plate can provide support for the stamping of waste building concrete materials; the stamping head can impact the waste building concrete materials, and the second stamping tooth on the stamping head can cooperate with the first stamping tooth on the stamping plate, thereby impacting and crushing the concrete in the waste building concrete materials to form preliminary powder after crushing; at the same time, the preliminary powder that meets the diameter of the first filter hole enters the transfer chamber through the first filter hole, so that it can directly enter the next processing step.

[0015] Furthermore, the cross-sectional profile of the stamping head is smaller than that of the transfer cavity; the upper end of the stamping cylinder is located outside the processing barrel.

[0016] The above settings allow the stamping head to more accurately impact the stamping chamber when it moves up and down to press the waste building concrete material; it also makes it easier to put the waste building concrete material into the stamping chamber from the top of the stamping cylinder, reducing the difficulty of feeding.

[0017] Furthermore, it also includes:

[0018] The gear ring is coaxially and fixedly installed on the outer wall of the stamping cylinder;

[0019] The driving gear has its tooth surface passing through the machining barrel and meshing with the outer wall of the gear ring;

[0020] The electric motor that drives the drive gear is fixedly mounted outside the processing barrel.

[0021] With the above configuration, the electric motor can cooperate with the drive gear and gear ring, enabling the stamping cylinder to rotate around the axis. The middle part of the stamping cylinder will not be blocked by the transmission structure, making the rotation of the stamping cylinder more reliable. It also facilitates the setting of structures such as the stamping chamber and stamping head, and the power arrangement and transmission are more reasonable.

[0022] Furthermore, the grinding section includes:

[0023] The grinding head has a lower end face of the stamping cylinder facing the upper end face of the grinding head, and a grinding cavity is provided between the stamping cylinder and the grinding head. The grinding cavity is connected to the transfer cavity. A screening cavity is provided at the bottom of the processing barrel. Several second filter holes connected to the screening cavity are provided on the grinding head.

[0024] The first grinding tooth is fixedly disposed on the lower end face of the stamping cylinder.

[0025] A second grinding tooth that can mesh with the first grinding tooth for grinding is fixedly disposed on the upper end face of the grinding head, and both the first grinding tooth and the second grinding tooth are located inside the grinding cavity.

[0026] With the above setup, once the initial powder is formed, it can automatically enter the grinding chamber through the transfer chamber. At this time, the stamping cylinder rotates under the drive of the drive gear and gear ring, and the first grinding tooth can cooperate with the second grinding tooth to grind the initial powder, quickly forming secondary powder. This reduces the external conveying steps of the initial powder and improves the recycling efficiency of concrete.

[0027] Furthermore, the grinding head is frustum-shaped, and a guide gap is provided between the first grinding tooth and the second grinding tooth on the side of the first grinding tooth near the center of the stamping cylinder. The width of the longitudinal section of the guide gap decreases to zero as it moves away from the center of the stamping cylinder.

[0028] With the above configuration, the frustum-shaped grinding head can support the rotation axis of the rotating stamping cylinder, making the rotation of the stamping cylinder more reliable and reducing the meshing pressure at the gear ring and the drive gear; at the same time, the guide gap allows the initial powder to enter the space between the first grinding tooth and the second grinding tooth more quickly, improving the grinding efficiency.

[0029] Furthermore, the screening section includes:

[0030] The bottom of the processing barrel is provided with a fixed ring and several third filter holes for particles smaller than 1mm to pass through. The fixed ring is threaded to the bottom of the processing barrel, and the several third filter holes are all located within the range of the fixed ring. The third filter holes are connected to the screening chamber.

[0031] Storage bag, the upper side of which is detachably connected to the retaining ring;

[0032] An elastic rotating thin plate is located in the screening chamber. The elastic rotating thin plate is horizontally installed in the screening chamber, and the screening chamber of the processing barrel is connected to the aggregate recycling unit.

[0033] With the above settings, the fixing ring makes the connection between the storage bag and the third filter hole more reliable and easier to disassemble and replace. When the secondary powder is screened to form the tertiary powder, the rotating elastic plate can screen out the aggregate and the tertiary powder more quickly, improving the formation efficiency of the tertiary powder and the recycling efficiency of the aggregate.

[0034] Furthermore, the aggregate recycling unit includes a negative pressure machine and a recycling bag detachably connected to the negative pressure machine. The negative pressure machine is fixedly installed on the processing drum and is connected to the screening chamber.

[0035] With the above settings, the negative pressure machine can fully recover the aggregate in the screening chamber into the recovery bag, thereby improving the recovery efficiency of the aggregate.

[0036] Furthermore, it also includes:

[0037] A horizontally positioned hydraulic telescopic rod is located on the upper side of the processing barrel;

[0038] The scraper is fixedly installed on the side of the hydraulic telescopic rod near the center of the processing barrel. The scraper can slide in contact with the upper side of the raised stamping plate. A conveyor slide is provided between the scraper and the conveyor belt, and the conveyor slide is fixedly connected to the processing barrel.

[0039] The conveyor belt includes an electromagnet, a vibrator, several flexible rubber plates, and a flipping and rebounding connection part connecting two adjacent rubber plates. The side of the rubber plate is provided with a metal plate that can be attracted by the electromagnet. The electromagnet is facing the metal detector, and the metal plate is located outside the detection range of the metal detector. When the metal detector detects metal on the rubber plate, the electromagnet is energized, and the attracted metal plate drives the rubber plate to flip, and the rubber plate tilts and contacts the vibrator.

[0040] With the above setup, after most of the concrete in the waste building concrete material is crushed, some non-metallic solid waste and metal waste will remain in the stamping chamber. The stamping plate is then lifted. When the upper surface of the stamping plate is raised to the same plane as the lower surface of the scraper, the hydraulic telescopic rod extends, and the scraper horizontally pushes the non-metallic solid waste and metal waste onto the conveyor slide and rubber plate. When the rubber plate moves to the metal detector, the metal detector detects metal in the solid waste. When the metal detector detects metal on the rubber plate, the conveyor belt stops conveying and simultaneously controls the electromagnet to be energized. The electromagnet attracts the metal sheet, which in turn causes the rubber plate to flip. The rubber plate tilts and contacts the vibrator, which then turns on. This allows the solid waste containing metal on the rubber plate to be screened and transferred to form primary metal waste. The remaining solid waste is removed from the end of the conveyor belt to form non-metallic solid waste. The primary metal waste may still contain some non-metallic solid waste. This primary metal waste can be dispersed again on the conveyor belt for multiple metal identification and sorting processes, which can improve the purity of the metal in the metal waste.

[0041] This invention also aims to provide a processing technology for separating and recycling waste building concrete materials, including a waste building concrete material separation and recycling system, and further including the following processing steps:

[0042] Waste building concrete material is fed into the stamping chamber of the stamping cylinder;

[0043] The stamping head moves up and down, and the stamping head presses against the stamping plate. The first and second stamping teeth impact the waste building concrete material. The waste building concrete material is crushed into preliminary powder and solid waste. The preliminary powder enters the transfer chamber through the first filter hole, while the solid waste remains on the stamping plate.

[0044] The initial powder enters the grinding chamber through the guide gap. The motor drives the drive gear to rotate intermittently, and the gear ring in turn drives the first grinding tooth on the stamping cylinder to rotate relative to the second grinding tooth, grinding the initial powder into secondary powder.

[0045] Secondary powder enters the screening chamber through the second filter hole. The rotating elastic plate screens the secondary powder a second time. Powder that meets the requirements of the third filter hole enters the collection bag through the third filter hole to form tertiary powder. Large particles of secondary powder that do not meet the specifications of the third filter hole are recycled by the aggregate recycling unit to form aggregate.

[0046] When the initial powder content in the solid waste is less than 5%, the stamping plate is lifted to a state where the upper surface is coplanar with the lower surface of the scraper. The hydraulic telescopic rod extends, and the scraper horizontally pushes the solid waste to the conveyor slide and rubber plate. When the rubber plate moves to the metal detector, the metal detector detects metal in the solid waste. When the metal detector detects metal on the rubber plate, it controls the electromagnet to be energized. The electromagnet attracts the metal sheet, which in turn causes the rubber plate to flip. The rubber plate tilts and contacts the vibrator. The vibrator is turned on, so that the solid waste containing metal on the rubber plate is screened and transferred to form the initial metal waste. The remaining solid waste is moved out from the end of the conveyor belt to form non-metallic solid waste.

[0047] The initial screened metal waste is then dispersed and placed on several rubber plates for further screening. After 3-5 metal identification and sorting processes, finished metal waste is formed, which is then collected, smelted, and stored for later use.

[0048] Through the above processing technology, primary powder, secondary powder, and tertiary powder can be processed and formed in a compact manner in sequence, and aggregates can be produced simultaneously. This enables rapid concrete recycling, improves concrete recycling efficiency, and reduces the cost of concrete recycling. When screening non-metallic solid waste and primary metal waste, the combination of several rubber plates, metal detectors, metal sheets, and electromagnets allows for accurate measurement of both metallic and non-metallic solid waste during the screening process, thereby rapidly increasing the metal content of the finished metal waste. The screening operation is simple, convenient, and reliable. Attached Figure Description

[0049] Figure 1 This is a sectional view of the waste building concrete material separation and recycling system in an embodiment of the present invention, taken from the front view direction.

[0050] Figure 2 for Figure 1 Enlarged longitudinal cross-sectional view of the metal identification and sorting unit.

[0051] Figure 3 This is a process flow diagram of the processing technology for separating and recycling waste building concrete materials in an embodiment of the present invention.

[0052] In the above figures: processing barrel 10, screening chamber 101, third filter hole 102, stamping cylinder 20, stamping chamber 201, first grinding tooth 202, stamping plate 30, first stamping tooth 31, electrically controlled lifting rod 301, first filter hole 302, stamping head 40, second stamping tooth 41, gear ring 501, drive gear 502, motor 503, grinding head 60, second grinding tooth 601, second filter hole 602, guide gap 603, fixing ring 70, storage bag 701, elastic rotating thin plate 702, negative pressure machine 703, metal detector 80, hydraulic telescopic rod 801, scraper 802, collection frame 803, conveying slide plate 804, electromagnet 805, vibrator 806, rubber plate 807, connecting cylinder 808, connecting head 809, torsion spring 810. Detailed Implementation

[0053] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0054] This embodiment is basically as follows: Figure 1 and Figure 2 As shown, this embodiment of the invention proposes a waste building concrete material separation and recycling system, including an impact crushing and screening unit, a metal identification and sorting unit, and an aggregate recycling unit; the impact crushing and screening unit includes a processing barrel 10, a stamping part, a grinding part, and a screening part, which are arranged sequentially from top to bottom inside the processing barrel 10; the aggregate recycling unit is connected to the screening part.

[0055] like Figure 1 As shown, the stamping section includes a rotatable stamping cylinder 20, a liftable stamping plate 30, and a vertically movable stamping head 40. A stamping cavity 201 is coaxially arranged inside the top of the stamping cylinder 20. The stamping plate 30 is located inside the stamping cavity 201 of the stamping cylinder 20. A first stamping tooth 31 is provided on the upper surface of the stamping plate 30, and an electrically controlled lifting rod 301 is provided on the lower side of the stamping plate 30. A transfer cavity communicating with the grinding section is provided on the lower side of the stamping cavity 201 of the stamping cylinder 20. A first filter hole 302 communicating with the stamping cavity 201 and the transfer cavity is vertically penetrating the stamping plate 30. The stamping head 40 can be moved into the stamping cavity 201, and a second stamping tooth 41 that can abut against the first stamping tooth 31 is fixedly provided on the lower surface of the stamping head 40. The cross-sectional profile of the stamping head 40 is smaller than the cross-sectional profile of the transfer cavity. The upper end of the stamping cylinder 20 is located outside the processing barrel 10.

[0056] At the same time, such as Figure 1 As shown, it also includes a gear ring 501, a drive gear 502, and a motor 503 that drives the drive gear 502. The gear ring 501 is coaxially fixedly mounted on the outer wall of the stamping cylinder 20; the tooth surface of the drive gear 502 passes through the processing barrel 10 and meshes with the outer wall of the gear ring 501; the motor 503 is fixedly mounted outside the processing barrel 10.

[0057] Among them, such as Figure 1 As shown, the grinding section includes a grinding head 60, a first grinding tooth 202, and a second grinding tooth 601 that can mesh with the first grinding tooth 202 for grinding. The lower end face of the stamping cylinder 20 is opposite to the upper end face of the grinding head 60, and a grinding cavity is provided between the stamping cylinder 20 and the grinding head 60. The grinding cavity is connected to the transfer cavity. A screening cavity 101 is provided at the bottom of the processing barrel 10. The grinding head 60 is provided with a plurality of second filter holes 602 that communicate with the screening cavity 101. The first grinding tooth 202 is integrally formed on the lower end face of the stamping cylinder 20; the second grinding tooth 601 is integrally formed on the upper end face of the grinding head 60. Both the first grinding tooth 202 and the second grinding tooth 601 are located in the grinding cavity. Meanwhile, as shown... Figure 1 As shown, the grinding head 60 is frustum-shaped. A guide gap 603 is provided between the first grinding tooth 202 and the second grinding tooth 601 on the side near the center of the stamping cylinder 20. The longitudinal cross-sectional width of the guide gap 603 decreases to zero as it moves away from the center of the stamping cylinder 20.

[0058] Among them, such as Figure 1 As shown, the screening section includes a fixing ring 70, a collection bag 701, and an elastic rotating thin plate 702 located in the screening chamber 101. The bottom of the processing barrel 10 is provided with a number of third filter holes 102 for particles smaller than 1mm to pass through. The fixing ring 70 is threadedly connected to the bottom of the processing barrel 10, and the number of third filter holes 102 are all located within the range of the fixing ring 70. The third filter holes 102 are connected to the screening chamber 101. The upper side of the collection bag 701 is snapped into the fixing ring 70. The elastic rotating thin plate 702 is horizontally installed in the screening chamber 101, and the screening chamber 101 of the processing barrel 10 is connected to the aggregate recycling unit.

[0059] At the same time, such as Figure 1 As shown, the aggregate recycling unit includes a negative pressure machine 703 and a recycling bag detachably connected to the negative pressure machine 703. The negative pressure machine 703 is fixedly installed on the right side of the processing barrel 10 by bolts, and the left side of the negative pressure machine 703 is connected to the screening chamber 101, while the right side of the negative pressure machine 703 is connected to the recycling bag.

[0060] like Figure 1 and Figure 2 As shown, the metal identification and sorting unit includes a metal detector 80, a horizontally arranged hydraulic telescopic rod 801, a scraper 802, a partially tiltable conveyor belt, and a collection frame 803. The hydraulic telescopic rod 801 is positioned on the upper side of the processing barrel 10. The scraper 802 is fixedly installed on the side of the hydraulic telescopic rod 801 near the center of the processing barrel 10, and the scraper 802 can slide in contact with the upper side of the lifted stamping plate 30. A conveyor slide plate 804 is provided between the scraper 802 and the conveyor belt, and the conveyor slide plate 804 is fixedly connected to the processing barrel 10 by bolts. The metal detector 80 is vertically opposite to the upper surface of the conveyor belt. Meanwhile, as... Figure 1 and Figure 2As shown, the conveyor belt includes an electromagnet 805, a vibrator 806, several flexible rubber plates 807, and a flipping and rebounding connecting part connecting two adjacent rubber plates 807. The side of the rubber plate 807 is provided with an iron piece that can be attracted by the electromagnet 805. The electromagnet 805 is directly opposite the metal detector 80, and the iron piece is located outside the detection range of the metal detector 80. When the metal detector 80 detects metal on the rubber plate 807, the electromagnet 805 is energized, and the attracted iron piece causes the rubber plate 807 to flip, and the rubber plate 807 tilts and contacts the vibrator 806.

[0061] In addition, the flip-back spring connection includes a connecting cylinder 808, a connecting head 809, and a torsion spring 810 located between the connecting cylinder 808 and the connecting head 809. The connecting cylinder 808 and the connecting head 809 are both horizontally arranged. The connecting cylinder 808 is embedded and glued to the middle of the side wall of the rubber plate 807, and the connecting head 809 is embedded and glued to the middle of the other side of the rubber plate 807. The other end of the connecting head 809 is coaxially embedded and glued to the connecting cylinder 808 on the adjacent rubber plate 807. One end of the torsion spring 810 is welded to the inner wall of the connecting cylinder 808, and the other end of the torsion spring 810 is welded to the outer wall of the connecting head 809. The side walls of the two adjacent rubber plates 807 are in contact with each other.

[0062] When processing waste building concrete materials, a waste building concrete material separation and recycling process is adopted, including a waste building concrete material separation and recycling system, and specifically includes the following processing steps:

[0063] Waste building concrete materials are loaded into the stamping chamber 201 of the stamping cylinder 20 in batches of 100kg using a hoisting machine.

[0064] After 100 kg of waste building concrete material is placed into the stamping chamber 201 of the stamping cylinder 20, the up-and-down movement of the stamping head 40 is started. The stamping head 40 presses against the stamping plate 30, and the first stamping tooth 31 and the second stamping tooth 41 impact the waste building concrete material. The waste building concrete material is crushed into preliminary powder and solid waste. The preliminary powder enters the transfer chamber through the first filter hole 302, and the solid waste remains on the stamping plate 30. During this process, the stamping cylinder 20 is in a paused rotation state.

[0065] The initial powder enters the grinding chamber through the guide gap 603. At this time, the motor 503 drives the drive gear 502 to rotate, and the gear ring 501 drives the first grinding tooth 202 on the stamping cylinder 20 to rotate relative to the second grinding tooth 601. The stamping cylinder 20 rotates at a speed of 30-60 r / min, thereby grinding the initial powder into secondary powder. After the stamping cylinder 20 rotates for 5-8 minutes, the motor 503 stops, and the stamping head 40 stamps again.

[0066] Secondary powder enters the screening chamber 101 through the second filter hole 602. The rotating elastic plate 702 stirs the secondary powder, achieving rapid secondary screening. The secondary powder that meets the requirements of the third filter hole 102 quickly enters the collection bag 701 through the third filter hole 102, forming tertiary powder. Large particles of secondary powder that do not meet the specifications of the third filter hole 102 are retained in the screening chamber 101. After the tertiary powder screening is completed, the negative pressure machine 703 is started. The negative pressure machine 703 sucks up the large particles of secondary powder and collects them into the recycling bag to form aggregate.

[0067] When the initial powder content in the solid waste is less than 5%, some non-metallic solid waste and metal waste will remain in the stamping chamber 201. At this time, the electrically controlled lifting rod 301 is used to lift the stamping plate 30. When the stamping plate 30 is lifted to the point where its upper surface is coplanar with the lower surface of the scraper 802, the hydraulic telescopic rod 801 extends, and the scraper 802 horizontally pushes the non-metallic solid waste and metal waste onto the conveyor slide 804 and the rubber plate 807. When the rubber plate 807 moves to the metal detector 80, the metal detector 80 performs metal detection on the solid waste. When the metal detector 80 detects metal on the rubber plate 807, the conveyor belt stops conveying. Simultaneously, the electromagnet 805 is energized, attracting the iron sheet and causing the rubber plate 807 to flip. The rubber plate 807 tilts and contacts the vibrator 806, which then turns on, causing the solid waste containing metal on the rubber plate 807 to be dumped and transferred into the collection frame 803, forming the initial screening of metal waste. The remaining solid waste is removed from the end of the conveyor belt, forming non-metallic solid waste. The electromagnet 805 is energized for 30 seconds and then de-energized. At this time, the elastic potential energy of the torsion spring 810 is released, and the connector 809 rotates in the connecting cylinder 808 under the drive of the torsion spring 810. As a result, the rubber plate 807 rotates to a horizontal state, and the conveyor belt continues to convey.

[0068] The initial screened metal waste is then dispersed and placed on several rubber plates 807 for further screening. After four metal identification and sorting processes, finished metal waste is formed, which is then collected, smelted, and stored for later use.

[0069] Through the above process, waste building concrete materials can be batched into the stamping chamber 201. When the waste building concrete materials are crushed, the motor 503 drives the gear ring 501 and the stamping cylinder 20 to rotate through the drive gear 502. The intermittent rotation of the stamping cylinder 20 can cooperate with the downward pressing of the stamping head 40, so that when the stamping cylinder 20 stops rotating, the stamping head 40 can impact the waste building concrete materials. The second stamping tooth 41 on the stamping head 40 can cooperate with the first stamping tooth 31 on the stamping plate 30, thereby impacting and crushing the concrete in the waste building concrete materials.

[0070] After impact crushing, the initial powder that meets the diameter of the first filter hole 302 enters the transfer chamber and grinding chamber through the first filter hole 302. During this process, the guide gap 603 between the first grinding tooth 202 and the second grinding tooth 601 guides the concrete particles. When the stamping cylinder 20 rotates, the first grinding tooth 202 rotates relative to the second grinding tooth 601. At this time, the first grinding tooth 202 and the second grinding tooth 601 grind the concrete particles, making the ground concrete particles into powder, thus realizing the regeneration of concrete. During this process, the stamping head 40 pauses the impact crushing, allowing the stamping cylinder 20 to rotate smoothly and enabling the stamping cylinder 20 to promptly crush the waste building concrete material. The process involves pressing and grinding concrete particles. The ground powdered concrete enters the screening chamber 101 through the second filter hole 602. At this time, the rotating elastic plate 702 can further screen the three-stage powder through the third filter hole 102, so that concrete particles smaller than 1mm can be quickly screened into the collection bag 701. The fine powdered concrete can be used as powder, improving the recycling efficiency of concrete and reducing the processing process and cost. The aggregate remaining in the screening chamber 101 is sucked into the recycling bag by the negative pressure machine 703, which can be used as aggregate for recycling, realizing the full utilization of waste building concrete.

[0071] At the same time, it can also screen non-metallic solid waste and metal waste, and through maximizing and reducing the cost of screening non-metallic solid waste and metal waste, and after multiple conveying, identification and dumping, it can improve the purity of the finished metal waste, which is convenient for subsequent smelting and preparation; it can also maximize the screening of non-metallic solid waste.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A waste building concrete material separation and recycling system, characterized in that, include: An impact crushing and screening unit, comprising a processing barrel, a stamping section, a grinding section, and a screening section, wherein the stamping section, the grinding section, and the screening section are arranged sequentially from top to bottom inside the processing barrel; A metal identification and sorting unit, comprising a metal detector and a partially tiltable conveyor belt, wherein the metal detector is vertically opposite to the upper surface of the conveyor belt; An aggregate recycling unit, which is connected to a screening unit; The stamping part includes: A rotatable stamping cylinder, wherein a stamping cavity is coaxially arranged inside the top of the stamping cylinder, a stamping plate is located inside the stamping cavity of the stamping cylinder, and a first stamping tooth is provided on the upper surface of the stamping plate; The press plate is adjustable, and the lower side of the press cylinder is provided with a transfer chamber that communicates with the grinding part. A first filter hole that connects the press chamber and the transfer chamber is vertically penetrating through the press plate. A vertically movable punch head, wherein the punch head is movable into the punching cavity and a second punching tooth is fixedly provided on the lower surface of the punch head, which can abut against the first punching tooth; The grinding unit includes: The grinding head has a lower end face of the stamping cylinder facing the upper end face of the grinding head, and a grinding cavity is provided between the stamping cylinder and the grinding head. The grinding cavity is connected to the transfer cavity. The bottom of the processing barrel is provided with a screening cavity, and the grinding head is provided with a number of second filter holes connected to the screening cavity. The first grinding tooth is fixedly disposed on the lower end face of the stamping cylinder. A second grinding tooth that can mesh with the first grinding tooth for grinding, the second grinding tooth being fixedly disposed on the upper end face of the grinding head, and both the first grinding tooth and the second grinding tooth being located inside the grinding cavity; Also includes: A horizontally arranged hydraulic telescopic rod is positioned on the upper side of the processing barrel; The scraper is fixedly installed on the side of the hydraulic telescopic rod near the center of the processing barrel. The scraper can slide in contact with the upper side of the lifted stamping plate. A conveyor slide is provided between the scraper and the conveyor belt, and the conveyor slide is fixedly connected to the processing barrel. The conveyor belt includes an electromagnet, a vibrator, several flexible rubber plates, and a flip-back connection connecting two adjacent rubber plates. The side of the rubber plate is provided with a metal piece that can be attracted by the electromagnet. The electromagnet is facing the metal detector, and the metal piece is outside the detection range of the metal detector. When the metal detector detects metal on the rubber plate, the electromagnet is energized, and the attracted metal piece causes the rubber plate to flip, and the rubber plate tilts and contacts the vibrator.

2. The waste building concrete material separation and recycling system as described in claim 1, characterized in that, The cross-sectional profile of the stamping head is smaller than that of the transfer cavity; the upper end of the stamping cylinder is located outside the processing barrel.

3. The waste building concrete material separation and recycling system as described in claim 2, characterized in that, Also includes: A gear ring, which is coaxially and fixedly mounted on the outer wall of the stamping cylinder; The driving gear has its tooth surface passing through the machining barrel and meshing with the outer wall of the gear ring; An electric motor that drives the drive gear is fixedly mounted outside the processing barrel.

4. The waste building concrete material separation and recycling system as described in claim 3, characterized in that, The grinding head is frustum shaped. A guide gap is provided between the first grinding tooth and the second grinding tooth on the side of the first grinding tooth near the center of the stamping cylinder. The width of the longitudinal section of the guide gap decreases to zero as it moves away from the center of the stamping cylinder.

5. The waste building concrete material separation and recycling system as described in claim 4, characterized in that, The screening section includes: The bottom of the processing barrel is provided with a number of third filter holes for particles smaller than 1mm to pass through. The fixing ring is threaded to the bottom of the processing barrel, and the number of third filter holes are all located within the range of the fixing ring. The third filter holes are connected to the screening chamber. A storage bag, the upper side of which is detachably connected to a retaining ring; An elastic rotating thin plate is located in the screening chamber, and the elastic rotating thin plate is horizontally installed in the screening chamber. The screening chamber of the processing barrel is connected to the aggregate recycling unit.

6. The waste building concrete material separation and recycling system as described in claim 5, characterized in that, The aggregate recycling unit includes a negative pressure machine and a recycling bag detachably connected to the negative pressure machine. The negative pressure machine is fixedly installed on the processing barrel and is connected to the screening chamber.

7. A processing technology for separating and recycling waste building concrete materials, characterized in that, The waste building concrete material separation and recycling system as described in claim 6 further includes the following processing steps: Waste building concrete material is fed into the stamping chamber of the stamping cylinder; The stamping head moves up and down, and the stamping head presses against the stamping plate. The first and second stamping teeth impact the waste building concrete material. The waste building concrete material is crushed into preliminary powder and solid waste. The preliminary powder enters the transfer chamber through the first filter hole, while the solid waste remains on the stamping plate. The initial powder enters the grinding chamber through the guide gap. The motor drives the drive gear to rotate intermittently, and the gear ring in turn drives the first grinding tooth on the stamping cylinder to rotate relative to the second grinding tooth, grinding the initial powder into secondary powder. Secondary powder enters the screening chamber through the second filter hole. The rotating elastic plate screens the secondary powder a second time. Powder that meets the requirements of the third filter hole enters the collection bag through the third filter hole to form tertiary powder. Large particles of secondary powder that do not meet the specifications of the third filter hole are recycled by the aggregate recycling unit to form aggregate. When the initial powder content in the solid waste is less than 5%, the stamping plate is lifted to a state where the upper surface is coplanar with the lower surface of the scraper. The hydraulic telescopic rod extends, and the scraper horizontally pushes the solid waste to the conveyor slide and the rubber plate. When the rubber plate moves to the metal detector, the metal detector detects metal in the solid waste. When the metal detector detects metal on the rubber plate, it controls the electromagnet to be energized. The electromagnet attracts the metal sheet, which in turn causes the rubber plate to flip. The rubber plate tilts and contacts the vibrator. The vibrator is turned on, so that the solid waste containing metal on the rubber plate is screened and transferred to form the initial metal waste. The remaining solid waste is removed from the end of the conveyor belt to form non-metallic solid waste. The initial screened metal waste is then dispersed and placed on several rubber plates for further screening. After 3-5 metal identification and sorting processes, finished metal waste is formed, which is then collected, smelted, and stored for later use.

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