Preparation method of high-performance recycled aggregate

Abstract

The invention discloses a preparation method of high-performance recycled aggregate, and relates to the technical field of building waste regeneration. According to the method, an integrated structure is adopted, a containing barrel is linked with a separation chamber, a deslagging system and a drying system, mortar centrifugal separation is achieved through a controllable stirring disc system, cleaning liquid recycling is achieved through water circulation spraying, an alkaline solution slowly permeates into the surface of aggregate, then a high-temperature mineralization reaction is conducted, microcracks and capillary pores are repaired, and the compactness and strength of the aggregate are improved. The whole method system has the advantages of simplicity and convenience in operation, high efficiency, high water resource utilization rate and remarkably enhanced aggregate performance, and is suitable for high-requirement recycled concrete aggregate production.

Description

Technical Field

[0001] This invention relates to the field of construction waste recycling technology, specifically a method for preparing high-performance recycled aggregate. Background Technology

[0002] In existing recycled aggregate preparation processes, simple cleaning methods are typically used to treat the surface of construction waste aggregates, primarily manual rinsing or drum agitation. While these methods can remove mortar, dust, and impurities adhering to the aggregate surface to some extent, they have several shortcomings. First, the cleaning is incomplete, and dust and lightweight mortar can easily re-adhere to the aggregate surface in a short time, affecting subsequent performance. Second, there is a lack of effective water-slag separation and mortar settling mechanisms, resulting in water waste and slurry backflow pollution. Third, the micro-cracks and capillaries in the aggregate are not effectively repaired, leading to low aggregate density and reduced strength, limiting its application in high-performance concrete. Fourth, the large amount of wastewater generated during the cleaning process often needs to be directly discharged into the sewage system, which is detrimental to water conservation and green production. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: a method for preparing high-performance recycled aggregate, comprising the following steps: S1, screening aggregate particles of 10-30mm size; S2, placing the aggregate particles screened in S1 into a placement tank to wash away the mortar and dust adhering to the aggregate particles; S3, draining the water used to wash the aggregate particles from the placement tank and removing the aggregate particles from the placement tank; S4, soaking the pretreated aggregate in a saturated solution of sodium silicate, trace amounts of phosphate, and calcium chloride (adjusting the concentration to a pH of 11-12); S5, placing the soaked aggregate particles back into the placement tank; S6, starting an air pump to dry the aggregate particles at 150℃ for 60 minutes; this process causes micro-expansion of the residual solution in the aggregate, surface ion migration, and local mineralization reaction, effectively plugging cracks, filling pores, and improving density; S7, removing the aggregate particles from the placement tank again after cooling.

[0004] Preferably, the soaking time in step S4 is controlled to be 2-4 hours, during which no stirring is performed, so that it slowly penetrates into the microcracks and capillaries of the aggregate.

[0005] Preferably, the bottom of the placement bucket is coaxially and fixedly connected to the separation chamber, and the separation chamber is coaxially and fixedly connected to the sedimentation and slag discharge chamber. A sedimentation and slag discharge pipe is fixedly connected to the bottom of the sedimentation and slag discharge chamber. A slag discharge screw is rotatably mounted inside the sedimentation and slag discharge pipe. The slag discharge screw is fixedly mounted on the output shaft of the slag discharge motor, and the housing of the slag discharge motor is fixedly mounted on the outer surface of the sedimentation and slag discharge pipe. Initially, the gaps in the slag discharge screw inside the sedimentation and slag discharge pipe are filled with fine sand to activate the sealing function.

[0006] Preferably, a toggle plate bracket is fixedly mounted on the bottom of the inner wall of the separation chamber, leaving a gap between the circumferential surface of the toggle plate bracket and the inner wall of the separation chamber. A toggle plate is rotatably mounted on the upper surface of the toggle plate bracket, and toggle pieces are fixedly mounted on the toggle plate in a circular pattern at equal intervals. A main shaft is rotatably inserted into the axis of the toggle plate bracket, and a support filter plate is fixedly mounted on the top of the main shaft. The support filter plate is rotatably engaged with the bottom of the inner wall of the placement tank. The support filter plate has multiple through holes for separating aggregate particles from the washed-down slurry and dust.

[0007] Preferably, a sealing sleeve is fixedly installed on the lower surface of the actuating disc bracket, and a gear ring disc is rotatably installed on the inner side of the sealing sleeve. The gear ring disc and the actuating disc are fixedly and synchronously rotated through a sleeve. The sleeve is rotatably sleeved on the main shaft, and a central gear is fixedly sleeved on the main shaft. The central gear and the gear ring disc are driven by three planetary gears meshing. All planetary gears are rotatably installed on the rotating disc. A main drive motor is fixedly installed on the outer surface of the sedimentation and slag discharge chamber. The output shaft of the main drive motor is fixedly matched with the main shaft, and the main shaft is rotatably and sealingly matched with the sedimentation and slag discharge chamber.

[0008] Preferably, a limiting groove is formed on the sealing sleeve along its own radial direction, and a limiting electromagnet is slidably installed in the limiting groove. The limiting electromagnet is in magnetic frictional engagement with the rotating disk. A sealing cover plate is fixedly installed on the lower surface of the sealing sleeve. The sealing cover plate is used to seal the rotating disk inside the sealing sleeve. The rotating disk, the sealing cover plate, and the sealing sleeve are all in rotational engagement.

[0009] Preferably, a through hole is provided at the bottom of the circumferential surface of the placement bucket, and an arc-shaped sealing door plate is sealed and fitted at the through hole. Two fixing ring drive electric cylinders are fixedly installed on the outer surface of the placement bucket. Fixing rings are fixedly installed at the ends of the telescopic rods of the two fixing ring drive electric cylinders. The fixing rings are slidably sleeved on the outside of the placement bucket and the arc-shaped sealing door plate to prevent the fixing rings from separating from the through hole. One side of the fixing ring is movably installed on one side of the through hole via a hinge, and a sealing strip is provided at the joint between the fixing ring and the through hole.

[0010] Preferably, a discharge chute is fixedly installed at the bottom of the outer surface of the container, the discharge chute is aligned with the arc-shaped sealing door panel, and the highest point of the discharge chute is lower than the upper surface of the supporting filter plate. An air pump is installed below the discharge chute. An air inlet is fixedly connected to the separation chamber, and the air inlet is connected to the air pump through an air guide pipe. A one-way valve and a heating coil are installed inside the air guide pipe.

[0011] Preferably, a drain outlet is fixedly connected to the separation chamber, and a drainage funnel is fixedly installed on the top of the inner wall of the separation chamber. The drain outlet is fixedly connected to a storage tank via a water pump, and a one-way valve is installed inside the drain outlet. A piston plate is slidably sealed to the inner wall of the storage tank, and two parallel sliding rods are fixedly installed on the piston plate. Both sliding rods slide with the storage tank. An exhaust hole is also provided on the storage tank. A spring is arranged around each sliding rod, and the two ends of the spring are fixedly engaged with the storage tank and the piston plate.

[0012] Preferably, the side of the storage tank located on the side of the water pump is provided with a recessed space, which is connected to the interior of the storage tank. The bottom of the recessed space is connected to the water pump, and the top of the recessed space is fixedly connected to an extension pipe. The end of the extension pipe away from the recessed space is fixedly connected to a spray head, which is coaxially fitted with the placement tank and is located directly above the placement tank.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention drives the water body to rotate by a dial, and under the action of centrifugal force, the slurry and floating dust are quickly separated to the sedimentation and slag discharge chamber, and the slag is automatically discharged by a screw propulsion system, thus avoiding the problem of slurry backflow in the traditional method. Meanwhile, the cleaning water is separated and diverted and then recycled back to the storage tank for reuse in the spray head, which significantly saves the amount of cleaning water and improves the overall resource utilization and environmental performance of the system; (2) This invention soaks the cleaned aggregate in an alkaline mixed liquid and controls the penetration without stirring, so that the solution slowly enters the capillary pores and microcracks of the aggregate to form a pre-reaction environment; then, with the help of hot air drying, it drives a small amount of expansion and local mineralization reaction, forming a self-healing pore-filling effect at the micro level, thereby improving the overall density, compressive strength and durability of the aggregate particles, and solving the problem of unstable performance of traditional recycled aggregate; (3) This invention uses a heating coil heating air guiding system to allow hot air to enter from the bottom and penetrate the entire aggregate pile upwards to ensure that the surface moisture of the aggregate evaporates; in addition, 60 minutes of constant temperature treatment effectively disperses the free water that has seeped into the solution, avoids crystal precipitation that causes microcracks, and comprehensively optimizes the drying quality and reaction effect of the treated aggregate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall external structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the overall internal structure of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure at the recessed space of the present invention.

[0017] Figure 4 This is a schematic diagram of the structure of the sediment discharge pipe of the present invention.

[0018] Figure 5 This is a schematic diagram of the separation chamber structure of the present invention.

[0019] Figure 6 This is a schematic diagram of the rotating disk structure of the present invention.

[0020] Figure 7 This is a schematic diagram of the structure of the paddle part of the present invention.

[0021] In the diagram: 101-Placement bucket; 102-Spray head; 103-Extension pipe; 104-Recessed space; 105-Storage box; 106-Water pump; 107-Sliding rod; 108-Spring; 109-Piston plate; 110-Arc-shaped sealing door panel; 111-Fixing collar; 112-Fixing collar drive cylinder; 113-Discharge chute; 114-Support filter plate; 115-Separation chamber; 116-Drain outlet; 117-Air inlet; 118-Air guide pipe; 119-Air pump; 120-Sedimentation and slag discharge chamber; 121-Sedimentation and slag discharge pipe; 122-Slag discharge screw; 123-Slag discharge motor; 124-Main drive motor; 125-Main shaft; 126-Actuating disc bracket; 127-Actuating disc; 128-Sealing sleeve; 129-Restricting chute; 130-Restricting electromagnet; 131-Rotating disc; 132-Planetary gear; 133-Central gear; 134-Gear ring disc; 135-Actuating plate; 136-Sealing cover plate; 137-Drainage funnel; 138-Exhaust port. Detailed Implementation

[0022] The following is in conjunction with the appendix Figures 1-7 The technical solution of the present invention will be further illustrated through specific embodiments.

[0023] This invention provides a method for preparing high-performance recycled aggregate, comprising the following steps: S1, screening aggregate particles with a size of 10-30 mm; S2, placing the aggregate particles screened in S1 into a placement tank 101 to wash away the mortar and dust adhering to the aggregate particles; S3, draining the water used to wash the aggregate particles from the placement tank 101 and removing the aggregate particles from the placement tank 101; S4, soaking the pretreated aggregate in a saturated solution of sodium silicate, trace amounts of phosphate, and calcium chloride (the concentration is adjusted to a pH of 11-12); the soaking time is controlled to be 2-4 hours, without stirring, allowing it to slowly penetrate into the microcracks and capillaries of the aggregate; S5, placing the soaked aggregate particles back into the placement tank 101; S6, starting the air pump 119 to dry the aggregate particles at 150°C for 60 minutes; this process causes micro-expansion of the residual solution in the aggregate, surface ion migration, and local mineralization reaction, effectively plugging cracks, filling pores, and improving density. S7. After cooling, remove the aggregate particles from the placement bucket 101 again.

[0024] The bottom of the placement tank 101 is coaxially and fixedly connected to the separation chamber 115, which in turn is coaxially and fixedly connected to the sedimentation and slag discharge chamber 120. A sedimentation and slag discharge pipe 121 is fixedly connected to the bottom of the sedimentation and slag discharge chamber 120. A slag discharge screw 122 is rotatably mounted inside the sedimentation and slag discharge pipe 121. The slag discharge screw 122 is fixedly mounted on the output shaft of the slag discharge motor 123, and the housing of the slag discharge motor 123 is fixedly mounted on the outer surface of the sedimentation and slag discharge pipe 121. Initially, the gaps in the slag discharge screw 122 inside the sedimentation and slag discharge pipe 121 are filled with fine sand, initiating a sealing function. A toggle plate bracket 126 is fixedly mounted on the bottom of the inner wall of the separation chamber 115, leaving a gap between the circumferential surface of the toggle plate bracket 126 and the inner wall of the separation chamber 115. A toggle plate 127 is rotatably mounted on the upper surface of the toggle plate bracket 126. Toggle pieces 135 are fixedly mounted on the toggle plate 127 at equal intervals. A main shaft 125 is rotatably inserted into the axis of the toggle plate bracket 126. A support filter plate 114 is fixedly mounted on the top of the main shaft 125. The support filter plate 114 is rotatably engaged with the bottom of the inner wall of the placement tank 101. The support filter plate 114 has multiple through holes for separating aggregate particles from the washed-down mortar and dust. A sealing sleeve 128 is fixedly installed on the lower surface of the actuating disc bracket 126. A gear ring disc 134 is rotatably installed on the inner side of the sealing sleeve 128. The gear ring disc 134 and the actuating disc 127 are fixedly rotated synchronously through a sleeve. The sleeve is rotatably sleeved on the main shaft 125. A central gear 133 is fixedly sleeved on the main shaft 125. The central gear 133 and the gear ring disc 134 are driven by three planetary gears 132 meshing. All planetary gears 132 are rotatably installed on the rotating disc 131. A main drive motor 124 is fixedly installed on the outer surface of the sedimentation and slag discharge chamber 120. The output shaft of the main drive motor 124 is fixedly engaged with the main shaft 125. The main shaft 125 and the sedimentation and slag discharge chamber 120 are rotatably sealed together. A limiting groove 129 is provided on the sealing sleeve 128 along its radial direction. A limiting electromagnet 130 is slidably installed in the limiting groove 129. The limiting electromagnet 130 is in magnetic friction engagement with the rotating disk 131. A sealing cover plate 136 is fixedly installed on the lower surface of the sealing sleeve 128. The sealing cover plate 136 is used to seal the rotating disk 131 inside the sealing sleeve 128. The rotating disk 131, the sealing cover plate 136, and the sealing sleeve 128 are all in rotational engagement.

[0025] A through hole is provided at the bottom of the circumferential surface of the storage container 101. An arc-shaped sealing door plate 110 is sealed and fitted at the through hole. Two fixing ring drive cylinders 112 are fixedly installed on the outer surface of the storage container 101. Fixing rings 111 are fixedly installed at the ends of the telescopic rods of the two fixing ring drive cylinders 112. The fixing rings 111 are slidably sleeved on the outside of the storage container 101 and the arc-shaped sealing door plate 110 to prevent the fixing rings 111 from separating from the through hole. One side of the fixing ring 111 is movably installed on one side of the through hole via a hinge, and a sealing strip is provided at the joint between the fixing ring 111 and the through hole. A discharge chute 113 is fixedly installed on the bottom of the outer surface of the placement tank 101. The discharge chute 113 is aligned with the position of the arc-shaped sealing door panel 110, and the highest point of the discharge chute 113 is lower than the upper surface of the supporting filter plate 114. An air pump 119 is installed below the discharge chute 113. An air inlet 117 is fixedly connected to the separation chamber 115. The air inlet 117 and the air pump 119 are connected through an air guide pipe 118. A one-way valve and a heating coil are installed in the air guide pipe 118. A drain outlet 116 is fixedly connected to the separation chamber 115. A drainage funnel 137 is fixedly installed on the top of the inner wall of the separation chamber 115. The drain outlet 116 is fixedly connected to a storage tank 105 via a water pump 106. A one-way valve is installed inside the drain outlet 116. A piston plate 109 is slidably sealed to the inner wall of the storage tank 105. Two parallel sliding rods 107 are fixedly installed on the piston plate 109. Both sliding rods 107 slide with the storage tank 105. An exhaust hole 138 is also provided on the storage tank 105. A spring 108 is arranged around each sliding rod 107. The two ends of the spring 108 are fixedly engaged with the storage tank 105 and the piston plate 109. A recessed space 104 is provided on the side of the storage box 105, which is located on the side of the water pump 106. The recessed space 104 is connected to the interior of the storage box 105. The bottom of the recessed space 104 is connected to the water pump 106. An extension pipe 103 is fixedly installed on the top of the recessed space 104. A spray head 102 is fixedly installed on the end of the extension pipe 103 away from the recessed space 104. The spray head 102 is coaxially engaged with the placement tank 101 and is located directly above the placement tank 101.

[0026] The working principle is as follows: Aggregate particles of 10-30mm size are screened; the screened aggregate particles are placed in the placement tank 101 to wash away the mortar and dust adhering to them. Specifically, clean water is injected into the placement tank 101, and the main drive motor 124 is started simultaneously. The output shaft of the main drive motor 124 drives the main shaft 125 to rotate, which in turn drives the support filter plate 114 to rotate. The support filter plate 114 then drives the aggregate particles inside the placement tank 101 to rotate (achieving relative movement with the water, thus washing the surface of the aggregate particles). Simultaneously, the limiting electromagnet 130 is activated, restricting the magnetic attraction between it and the rotating disk 131. This prevents the rotating disk 131 from rotating, thus preventing the planetary gear 132 from revolving. The main shaft 125 drives the fixed central gear 133 to rotate, which in turn drives the gear ring disk 134 to rotate via the planetary gear 132. The gear ring disk 134 then drives the paddle 135 on the actuating disk 127 to rotate, causing the water inside the separation chamber 115 to rotate, thus mixing the mortar in the water with... The rotating dust causes the mortar and dust to separate from the water under centrifugal force. The mortar and dust then gradually sink along the inner wall of the separation chamber 115 into the sedimentation and slag discharge chamber 120 (under gravity), and then gradually sink to the bottom of the chamber. By starting the slag discharge motor 123, the output shaft of the motor 123 drives the slag discharge screw 122 to rotate, discharging the settled mortar and dust (it is necessary to maintain mortar and dust in the gap between the sedimentation and slag discharge pipe 121 and the slag discharge screw 122 to achieve a sealing effect). Clean water will be located at the top inside the separation chamber 115 and then discharged through the drain outlet 116 (the air inlet 117 does not flow due to the one-way valve). The water remaining on the filter plate 114 will be guided by the guide funnel 137, causing the water to flow towards the center of the agitator 127. Start the water pump 106, which sends water into the recessed space 104 inside the storage tank 105 (the recessed space 104 and the storage tank 105 are integrated; the function of the recessed space 104 is to activate the water flow channel when the piston plate 109 moves to the extreme position inside the storage tank 105, so that the extension pipe 103 is always connected to the water pump 106). Then, the water is discharged into the spray head 102 through the extension pipe 103, and then sprayed onto the surface of the aggregate particles inside the placement bucket 101 through the spray head 102 until the aggregate particles are cleaned.An electric valve is installed inside the spray head 102 to block the extension pipe 103 and the spray head 102. By controlling the electric valve, one end of the extension pipe 103 is blocked. At this time, the water entering the recessed space 104 will push the piston plate 109 to slide in the storage tank 105. The water pump 106 provides pressure, and the spring 108 will be gradually compressed during this process to store the water in the placement tank 101 into the storage tank 105, thereby saving water resources. After all the water in the placement tank 101 and the separation chamber 115 has been sent into the storage tank 105 (a little water will still remain in the separation chamber 115, below the position of the drain outlet 116), the water pump 106 is stopped (a one-way valve is installed to prevent the water in the storage tank 105 from flowing back into the separation chamber 115). Activate the fixed collar drive cylinder 112. The telescopic rod of the fixed collar drive cylinder 112 drives the fixed collar 111 to separate from the arc-shaped sealing door plate 110, so it is no longer fitted on the outside of the arc-shaped sealing door plate 110. At this time, the arc-shaped sealing door plate 110 is opened, and finally the aggregate particles inside the placement tank 101 are taken out (due to the rotation of the supporting filter plate 114, the aggregate particles are gradually thrown out of the placement tank 101 under the action of centrifugal force, and then guided to the designated position through the discharge chute 113). When cleaning the next batch of aggregate particles, simply open the electric valve inside the spray head 102 to spray water into the placement tank 101.

[0027] The washed aggregate is soaked in a saturated solution of sodium silicate, trace amounts of phosphate, and calcium chloride (the concentration is adjusted to a pH of 11-12). The soaked aggregate particles are then placed back into the placement tank 101 (at this point, the arc-shaped sealing door 110 is closed). The main drive motor 124 is started. Since there is no water in the separation chamber 115, water purification is unnecessary, and therefore the limiting electromagnet 130 does not need to be activated. The limiting electromagnet 130 will not be magnetically fixed to the rotating disk 131, allowing the rotating disk 131 to rotate within the sealing sleeve 128. This causes the planetary gear 132 to revolve, preventing the central gear 133 from driving the gear ring disk 134 to rotate via the planetary gear 132. Consequently, the paddle 135 will not rotate. Finally, the air pump 119 is started to dry the aggregate particles at 150°C for 60 minutes. This process causes micro-expansion of the residual solution in the aggregate, surface ion migration, and localized mineralization, effectively sealing cracks, filling pores, and improving density. Specifically, the air blown out by the air pump 119 enters the support filter plate 114 through the air guide pipe 118 and the air inlet 117. Since a heating wire is installed inside the air guide pipe 118, the air is heated. The hot air entering the separation chamber 115 rises through the support filter plate 114 and enters the placement tank 101. The hot air moves to the top of the placement tank 101 through the gaps between the aggregate particles, drying the surface of all the aggregate particles. Finally, after cooling, the arc-shaped sealing door plate 110 is opened again to remove the aggregate particles from the placement tank 101.

Claims

1. A method for preparing high-performance recycled aggregate, characterized in that... Includes the following steps: S1. Screen aggregate particles with a size of 10-30mm; S2. Place the aggregate particles screened in S1 into the placement bucket (101) to wash away the mortar and dust adhering to the aggregate particles; S3. Drain the water used to wash the aggregate particles from the placement bucket (101) and remove the aggregate particles from the placement bucket (101); S4. Soak the pretreated aggregate in a saturated solution of sodium silicate, trace amounts of phosphate, and calcium chloride. S5. Put the soaked aggregate particles back into the placement bucket (101); S6. Start the air pump (119) and dry the aggregate particles at 150°C for 60 minutes. S7. After cooling, remove the aggregate particles from the placement bucket (101) again.

2. The method for preparing high-performance recycled aggregate according to claim 1, characterized in that: In step S4, the soaking time is controlled to be 2-4 hours, during which no stirring is performed, allowing it to slowly penetrate into the micro-cracks and capillaries of the aggregate.

3. The method for preparing high-performance recycled aggregate according to claim 1, characterized in that: The bottom of the placement bucket (101) is coaxially and fixedly connected to the separation chamber (115), and the separation chamber (115) is coaxially and fixedly connected to the sedimentation and slag discharge chamber (120). The bottom of the sedimentation and slag discharge chamber (120) is fixedly connected to a sedimentation and slag discharge pipe (121). A slag discharge screw (122) is rotatably mounted inside the sedimentation and slag discharge pipe (121). The slag discharge screw (122) is fixedly mounted on the output shaft of the slag discharge motor (123), and the outer shell of the slag discharge motor (123) is fixedly mounted on the outer surface of the sedimentation and slag discharge pipe (121).

4. The method for preparing high-performance recycled aggregate according to claim 3, characterized in that: A toggle plate bracket (126) is fixedly mounted on the bottom of the inner wall of the separation chamber (115), leaving a gap between the circumferential surface of the toggle plate bracket (126) and the inner wall of the separation chamber (115). A toggle plate (127) is rotatably mounted on the upper surface of the toggle plate bracket (126). A toggle piece (135) is fixedly mounted on the toggle plate (127) at equal intervals. A main shaft (125) is rotatably inserted into the axis of the toggle plate bracket (126). A support filter plate (114) is fixedly mounted on the top of the main shaft (125). The support filter plate (114) is rotatably fitted with the bottom of the inner wall of the placement bucket (101). The support filter plate (114) has multiple through holes for separating aggregate particles from the washed-down mortar and dust.

5. The method for preparing high-performance recycled aggregate according to claim 4, characterized in that: A sealing sleeve (128) is fixedly installed on the lower surface of the actuating disc bracket (126). A gear ring disc (134) is rotatably installed on the inner side of the sealing sleeve (128). The gear ring disc (134) and the actuating disc (127) are fixedly rotated synchronously through a sleeve. The sleeve is rotatably sleeved on the main shaft (125). A central gear (133) is fixedly sleeved on the main shaft (125). The central gear (133) and the gear ring disc (134) are driven by three planetary gears (132). All planetary gears (132) are rotatably installed on the rotating disc (131). A main drive motor (124) is fixedly installed on the outer surface of the sedimentation slag discharge chamber (120). The output shaft of the main drive motor (124) is fixedly matched with the main shaft (125). The main shaft (125) and the sedimentation slag discharge chamber (120) are rotatably sealed together.

6. The method for preparing high-performance recycled aggregate according to claim 5, characterized in that: A limiting groove (129) is provided on the sealing sleeve (128) along its own radial direction. A limiting electromagnet (130) is slidably installed in the limiting groove (129). The limiting electromagnet (130) and the rotating disk (131) are magnetically frictionally engaged. A sealing cover plate (136) is fixedly installed on the lower surface of the sealing sleeve (128). The sealing cover plate (136) is used to seal the rotating disk (131) inside the sealing sleeve (128). The rotating disk (131), the sealing cover plate (136), and the sealing sleeve (128) are all rotatably engaged.

7. The method for preparing high-performance recycled aggregate according to claim 6, characterized in that: A through hole is provided at the bottom of the circumferential surface of the placement bucket (101), and an arc sealing door plate (110) is sealed and fitted at the through hole. Two fixed collar drive electric cylinders (112) are fixedly installed on the outer surface of the placement bucket (101). Fixed collars (111) are fixedly installed at the ends of the telescopic rods of the two fixed collar drive electric cylinders (112). The fixed collars (111) are slidably sleeved on the outside of the placement bucket (101) and the arc sealing door plate (110) to prevent the fixed collars (111) from separating from the through hole.

8. The method for preparing high-performance recycled aggregate according to claim 7, characterized in that: A discharge chute (113) is fixedly installed on the bottom of the outer surface of the placement bucket (101). The discharge chute (113) is aligned with the arc-shaped sealing door plate (110), and the highest point of the discharge chute (113) is lower than the upper surface of the supporting filter plate (114). An air pump (119) is installed below the discharge chute (113). An air inlet (117) is fixedly connected to the separation chamber (115). The air inlet (117) and the air pump (119) are connected through an air guide pipe (118). A one-way valve and a heating coil are installed inside the air guide pipe (118).

9. The method for preparing high-performance recycled aggregate according to claim 8, characterized in that: A drain outlet (116) is fixedly connected to the separation chamber (115). A drainage funnel (137) is fixedly connected to the top of the inner wall of the separation chamber (115). A storage tank (105) is fixedly connected to the drain outlet (116) via a water pump (106). A one-way valve is installed inside the drain outlet (116). A piston plate (109) is slidably sealed to the inner wall of the storage tank (105). Two parallel sliding rods (107) are fixedly installed on the piston plate (109). Both sliding rods (107) are slidably connected to the storage tank (105). An exhaust hole (138) is also provided on the storage tank (105). A spring (108) is arranged around each sliding rod (107). The two ends of the spring (108) are fixedly connected to the storage tank (105) and the piston plate (109).

10. A method for preparing high-performance recycled aggregate according to claim 9, characterized in that: The side of the storage box (105) is provided with a recessed space (104) on the side of the water pump (106). The recessed space (104) is connected to the interior of the storage box (105). The bottom of the recessed space (104) is connected to the water pump (106). An extension pipe (103) is fixedly connected to the top of the recessed space (104). A spray head (102) is fixedly connected to the end of the extension pipe (103) away from the recessed space (104). The spray head (102) is coaxially matched with the placement bucket (101) and the spray head (102) is located directly above the placement bucket (101).

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