A modular integrated clay-based recycled aggregate production system and its operation process

Abstract

The present invention discloses a modular integrated clay-based recycled aggregate production system and its operation process, wherein the modular integrated clay-based recycled aggregate production system comprises: a batching module, an aggregate manufacturing module and a control module, wherein the batching module comprises: a binder silo, an additive silo, a blending silo, a crushing device, an automatic metering unit and a stirring device; the aggregate manufacturing module comprises: a mixing material conveyor belt, an extrusion molding device and a clay-based recycled aggregate silo; the control module comprises: a control system. The present invention adopts a modular integrated clay-based recycled aggregate production system, which can utilize muddy gelatinous waste with a high moisture content in a large-scale resource-free manner without drying, and effectively solves the engineering, social and ecological management problems of high cost, harm to the ecological environment and unsustainable management of gelatinous solid waste with a high moisture content, and at the same time, the raw materials of the produced clay-based recycled aggregate are cheap and easy to obtain.

Description

Technical Field

[0001] The invention relates to the field of solid waste utilization equipment, and in particular to a modular integrated clay-based recycled aggregate production system and an operation process thereof. Background Art

[0002] As a major infrastructure country, my country produces a large amount of construction waste every year, most of which is engineering slag. The engineering output soil in the engineering slag has a large mud content, complex composition, large particle size fluctuations, and high water absorption. The regenerated sand produced after mud and sand separation has a high mud content and unreasonable grading, which causes the concrete working performance and mechanical properties (such as workability, strength, elastic modulus and creep, etc.) prepared with regenerated sand to deteriorate significantly; and the mud after mud and sand separation has problems such as large land occupation, low efficiency, high pollution and low resource utilization in the process of filter pressing and dehydration. At present, the main treatment methods for engineering output soil are external transportation, landfill, mountain landscaping, as planting soil, consolidation as road material, production of unburned bricks, sintered bricks (ceramsite), etc., and the resource utilization value is low.

[0003] The generation and disposal of engineering soil in my country are closely related to the process of urbanization. At the beginning of urbanization, engineering soil was mainly absorbed by backfilling and roadbed construction. As the urbanization process gradually accelerated, there were more and more new construction, renovation and expansion, and demolition projects. A large amount of engineering soil could not be absorbed in a certain area in a short period of time. Filling in idle plots, mountain gullies, beaches and other receiving sites became the main disposal method for engineering soil at this stage. When the urbanization process developed rapidly, the exploitable land resources on the ground became less and less, and the construction of underground space and infrastructure (underground parking lots, underground shopping malls, subway projects, underground pipe networks, etc.) increased day by day. For the sharply increased engineering soil, landfill disposal could no longer meet the requirements of engineering construction and urban development. High value-added and efficient resource disposal and application were the main disposal methods at this stage, and also one of the effective ways to achieve waste-free cities and sustainable urban development.

[0004] In addition, there are various types of silt produced by cleaning rivers, lakes and seas, especially the muddy and gelatinous wastes with a high water content in these solid wastes, which have always been a difficult problem in the management of solid wastes, especially the lack of technical solutions for efficient resource utilization.

[0005] At present, the construction field mainly uses centrifugal granulators for granulation. However, due to the high requirements on the moisture content of the raw materials during the granulation process, drying equipment is required for muddy and gelatinous waste with a high moisture content, and the large-scale production cost is relatively high. Summary of the invention

[0006] The purpose of the present invention is to propose a modular integrated clay-based recycled aggregate production system to solve the technical problem of the lack of large-scale production equipment and production methods for colloidal waste with high water content without drying.

[0007] The present invention provides a modular integrated clay-based recycled aggregate production system, comprising: a batching module, an aggregate manufacturing module and a control module;

[0008] The batching module includes: a binder silo, an additive silo, a blending silo, a crushing device, an automatic metering unit and a mixing device;

[0009] The aggregate manufacturing module includes: a mixing material conveyor belt, an extrusion molding device and a clay-based recycled aggregate silo;

[0010] The control module includes: a control system;

[0011] The binder silo and the additive silo are located above the mixing device, the admixture silo is located above the pulverizing device, and the pulverizing device is located below the mixing device; the binder silo, the additive silo, the admixture silo and the pulverizing device are all provided with the automatic metering unit; the binder silo, the additive silo and the pulverizing device are respectively connected to the mixing device, and the mixing device is connected to the extrusion molding device through a mixing material conveyor belt; the clay-based recycled aggregate silo is located below the extrusion molding device;

[0012] The control system is connected to the batching module and the aggregate manufacturing module.

[0013] Furthermore, the crushing equipment includes: an upper hopper, an inlet, a crusher, and an outlet. The upper hopper is provided with an automatic metering unit, the inlet is located at the front end of the crusher, the outlet is located at the rear end of the crusher, and the outlet is connected to the mixing equipment through a bucket elevator.

[0014] Furthermore, an iron remover and a material distributor are provided on the mixing material conveyor belt, and the iron remover is located on the mixing material conveyor belt between the stirring device and the extrusion molding device;

[0015] The distributor is located above the extrusion molding equipment;

[0016] The iron remover comprises: a rake-type rotating electromagnet, an iron chip collector and an iron removal controller, wherein the rake-type rotating electromagnet is connected to the iron chip collector, the iron removal controller is connected to the rake-type rotating electromagnet, and the lowest point of the rake-type rotating electromagnet is 5 mm away from the upper surface of the mixing material conveyor belt;

[0017] The iron removal controller is connected to the control system.

[0018] Furthermore, the extrusion molding equipment includes: a feed port, a double-roll extrusion device, an aggregate vibrating screen, a residual material conveyor belt and an extrusion controller, the feed port is located above the double-roll extrusion device, the feed port is connected to the mixing equipment through the mixing material conveyor belt, the double-roll extrusion device is located above the aggregate vibrating screen, the aggregate vibrating screen is located above the residual material conveyor belt, and the extrusion controller is connected to the control system and the extrusion molding equipment.

[0019] Furthermore, the pair of rollers extrusion device includes: a pair of rollers, an extrusion motor and a roller cleaning machine, the surface of the pair of rollers is provided with a plurality of hemispherical grooves, the pair of rollers is connected to the extrusion motor, the roller cleaning machine is connected to the extrusion controller, and the roller cleaning machine is located above the pair of rollers.

[0020] Furthermore, the aggregate vibrating screen includes: a screen support, an aggregate screen, a vibration motor, a flexible support and a flexible cover plate, the screen support is located below the roller extrusion device, the aggregate screen is located on the screen support, the vibration motor is located above the aggregate screen, the flexible support is connected to the aggregate screen, and the flexible cover plate is connected to the flexible support.

[0021] Furthermore, five extrusion molding equipment are provided, including two rollers with hemispherical grooves of 10 mm in diameter, two rollers with hemispherical grooves of 20 mm and one roller with hemispherical grooves of 30 mm in diameter, which are arranged in sequence from near to far from the stirring equipment. The extrusion molding equipment with hemispherical grooves of 30 mm, 20 mm and 10 mm in diameter are arranged in sequence.

[0022] Another object of the present invention is to provide an operation process of the modular integrated clay-based recycled aggregate production system, comprising the following steps:

[0023] S1. The mud cake with a moisture content of less than 60% is transported to the hopper of the crushing equipment through the feeding equipment, and the admixture in the admixture bin is added to the feeding port through the control system according to production needs;

[0024] S2. The crushed mud cake is weighed by the control system and transported to the mixing equipment by the bucket elevator. The weighed binder and additives are then added to the mixing equipment in sequence and stirred for 3 to 25 minutes.

[0025] S3, the stirred mixture is passed through a mixing material conveyor belt and an iron remover to remove iron, and then is conveyed to an extrusion molding device through a distributor, the formed clay-based recycled aggregate is vibrated and screened by an aggregate vibrating screen and falls into a clay-based recycled aggregate bin, and the remaining material after vibration screening is conveyed to the mixing material conveyor belt through a remaining material conveyor belt;

[0026] S4. After the mixing material on the mixing material conveyor belt is produced, the roller cleaning machine is controlled by the control system to clean the rollers.

[0027] Furthermore, the extrusion molding equipment is controlled by the control system controlling the extrusion controller, or is controlled solely by the extrusion controller.

[0028] Furthermore, the produced clay-based recycled aggregate has a 28d cylinder compressive strength greater than 2MPa and a 28d crushing index less than 30%.

[0029] The present invention adopts a modular integrated clay-based recycled aggregate production system to carry out high-value-added resource utilization of mud-like waste with a high water content, and manufactures mud-like waste with a water content of less than 60% into clay-based recycled aggregate without drying, thereby effectively solving the engineering, social and ecological management problems of high cost, harm to the ecological environment and unsustainable management of colloidal solid waste with a high water content. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a top view of the layout of a modular integrated clay-based recycled aggregate production system.

[0031] Figure 2 This is the main view of the floor plan of a modular integrated clay-based recycled aggregate production system.

[0032] Figure 3 This is a right view of the plan layout of a modular integrated clay-based recycled aggregate production system.

[0033] Figure 4 Schematic diagram of an iron remover for a modular integrated clay-based recycled aggregate production system.

[0034] Figure 5 Schematic diagram of extrusion molding equipment for a modular integrated clay-based recycled aggregate production system.

[0035] Figure 6 Schematic diagram of aggregate vibrating screen for a modular integrated clay-based recycled aggregate production system.

[0036] Figure 7 Schematic diagram of a modular integrated clay-based recycled aggregate production method.

[0037] Figure 8 Schematic diagram of a clay-based recycled aggregate.

[0038] In the figure: 1. Batching module; 2. Aggregate manufacturing module; 3. Control module; 4. Binder silo; 5. Additive silo; 6. Blending silo; 7. Crushing equipment; 8. Automatic metering unit; 9. Mixing equipment; 10. Mixing material conveyor belt; 11. Extrusion molding equipment; 12. Clay-based recycled aggregate silo; 13. Control system; 14. Control room; 15. Upper hopper; 16. Feed inlet; 17. Crusher; 18. Discharge outlet; 19. Bucket elevator; 20. , iron remover; 21. material distributor; 22. rake type rotating electromagnet; 23. iron chip collector; 24. iron remover controller; 25. feed inlet; 26. double roller extrusion device; 27. aggregate vibrating screen; 28. residual material conveyor belt; 29. ​​extrusion controller; 30. double roller wheels; 31. extrusion motor; 32. roller cleaning machine; 33. hemispherical groove; 34. screen bracket; 35. aggregate screen; 36. vibration motor; 37. flexible bracket; 38. flexible cover. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0041] like Figure 1 As shown, a modular integrated clay-based recycled aggregate production system comprises: a batching module 1, an aggregate manufacturing module 2 and a control module 3.

[0042] The batching module 1 includes: a binder silo 4, an additive silo 5, a blending silo 6, a crushing device 7, an automatic metering unit 8 and a mixing device 9; the aggregate manufacturing module 2 includes: a mixing material conveyor belt 10, an extrusion molding device 11 and a clay-based recycled aggregate silo 12.

[0043] The control module 3 includes: a control system 13 and a control room 14 .

[0044] The binder silo 4 and the additive silo 5 are located above the mixing device 9, the admixture silo 6 is located above the crushing device 7, and the crushing device 7 is located below the mixing device 9. The binder silo 4, the additive silo 5, the admixture silo 6 and the crushing device 7 are all provided with the automatic metering unit 8. The binder silo 4, the additive silo 5 and the crushing device 7 are respectively connected to the mixing device 9, and the mixing device 9 is connected to the extrusion molding device 11 through the mixing material conveyor belt 10. The clay-based recycled aggregate silo 12 is located below the extrusion molding device 11, and the control system 13 is located in the control room 14. The modular integrated clay-based recycled aggregate production system of the present invention can crush mud cakes with a moisture content of less than 60% after adding admixtures, and add binders and additives for stirring, and produce clay-based recycled aggregates that meet engineering requirements through extrusion molding equipment 11, which significantly improves the added value of resource utilization of colloidal waste with a high moisture content, provides a technical solution for the high-quality development of industries related to colloidal waste with a high moisture content, and effectively provides a new type of recycled aggregate for engineering construction, promoting the development of the construction industry.

[0045] like Figure 2 As shown, the crushing equipment 7 includes: an upper hopper 15, a feed port 16, a crusher 17, and a discharge port 18. The upper hopper 15 is provided with an automatic metering unit 8. The feed port 16 is located at the front end of the crusher 17, and the discharge port 18 is located at the rear end of the crusher 17. The discharge port 18 is connected to the mixing equipment 9 through a bucket elevator 19. By adding admixtures before the mud cake is crushed, the water absorption of the admixture is utilized to effectively solve the technical problem that the mud cake with a large water content is easy to agglomerate after crushing, and at the same time, the preliminary mixing of the mud cake and the admixture is achieved, so that the mixing materials are fully mixed before the clay-based recycled aggregate is formed.

[0046] like Figure 3 and Figure 4 As shown, the mixing material conveyor belt 10 is provided with an iron remover 20 and a distributor 21, the iron remover 20 is located on the mixing material conveyor belt 10 between the stirring device 9 and the extrusion molding device 11, and the distributor 21 is located above the extrusion molding device 11;

[0047] The iron remover 20 includes: a rake-type rotating electromagnet 22, an iron chip collector 23 and an iron removal controller 24. The rake-type rotating electromagnet 22 is connected to the iron chip collector 23, and the iron removal controller 24 is connected to the rake-type rotating electromagnet 22. The lowest point of the rake-type rotating electromagnet 22 is 5 mm away from the upper surface of the mixing material conveyor belt 10. When the rake tip of the rake-type rotating electromagnet 22 of the iron remover 20 rotates to a distance of 50 mm from the mixing material conveyor belt 10, the rake-type rotating electromagnet 22 is energized; when the rake tip of the rake-type rotating electromagnet 22 of the iron remover 20 rotates to a distance of 50 mm from the iron chip collector 23, the rake-type rotating electromagnet 22 is de-energized; by energizing and de-energizing the rake-type rotating electromagnet 22 of the iron remover 20, the iron chips in the mixing material are effectively removed and recovered into the iron chip collector 23, thereby preventing the iron chips mixed in the mixing material from damaging the roller wheels 30 of the extrusion molding equipment 11, and at the same time ensuring the molding quality of the clay-based recycled aggregate.

[0048] like Figure 5 As shown, the extrusion molding equipment 11 includes: a feed port 25, a roller extrusion device 26, an aggregate vibrating screen 27, a residual material conveyor belt 28 and an extrusion controller 29. The feed port 25 is located above the roller extrusion device 26. The feed port 25 is connected to the mixing device 9 through the mixing material conveyor belt 10. The roller extrusion device 26 is located above the aggregate vibrating screen 27. The aggregate vibrating screen 27 is located above the residual material conveyor belt 28. The extrusion controller 29 is connected to the control system 13 and the extrusion molding equipment 11 and is located next to the extrusion molding equipment 11. The mixing material is extruded into clay-based recycled aggregate through the extrusion molding equipment 11, realizing the large-scale production of colloidal waste with a high moisture content without drying, and providing production equipment support for sustainable development and waste-free city construction.

[0049] like Figure 5 As shown, the roller extrusion device 26 includes: roller wheels 30, extrusion motor 31 and roller cleaning machine 32. The surface of the roller wheels 30 is provided with a plurality of hemispherical grooves 33. The roller wheels 30 are connected to the extrusion motor 31. The roller cleaning machine 32 is connected to the extrusion controller 29. The roller cleaning machine 32 is located above the roller wheels 30. By providing the hemispherical grooves 33 on the surface of the roller wheels 30, the mixture of the colloidal waste with a high water content is extruded into an ellipsoidal clay-based recycled aggregate, so that the clay-based recycled aggregate is tightly combined together by physical action before molding, reducing the porosity of the clay-based recycled aggregate, and ensuring that the particle shape of the clay-based recycled aggregate is uniform and complete, which effectively promotes the strength growth of the clay-based recycled aggregate.

[0050] like Figure 6As shown, the aggregate vibrating screen 27 includes: a screen bracket 34, an aggregate screen 35, a vibration motor 36, a flexible bracket 37 and a flexible cover plate 38. The screen bracket 34 is located below the double-roll extrusion device 26, the aggregate screen 35 is located on the screen bracket 34, the vibration motor 36 is located above the aggregate screen 35, the flexible bracket 37 is connected to the aggregate screen 35, and the flexible cover plate 38 is connected to the flexible bracket 37. The connecting materials between the clay-based recycled aggregate particles and the edge materials of the particles are effectively removed by the aggregate vibrating screen 27, and these connecting materials, edge materials and other unformed mixed materials are screened out, and the screened mixed materials are conveyed to the extrusion molding equipment 11 through the residual material conveyor belt 28 to be extruded into clay-based recycled aggregate again, thereby improving the appearance quality of the clay-based recycled aggregate particles and the utilization rate of the mixed materials, and effectively avoiding the clay-based recycled aggregate from agglomerating and being difficult to disperse after entering the clay-based recycled aggregate bin 12 due to the bridging and bonding effect of the unformed mixed materials, and at the same time eliminating the influence of the connecting materials between the clay-based recycled aggregate particles, the edge materials of the particles and other unformed mixed materials on the cylinder compressive strength and crushing index test results of the clay-based recycled aggregate.

[0051] Optional, such as Figure 1 and Figure 3 As shown, five extrusion molding devices 11 are provided, two of which have a hemispherical groove 33 with a diameter of 10 mm, two of which have a diameter of 20 mm, and one of which has a diameter of 30 mm. Extrusion molding devices 11 with hemispherical grooves 33 with diameters of 30 mm, 20 mm, and 10 mm are provided in sequence from near to far from the stirring device 9. By providing extrusion molding devices 11 with different particle sizes, the needs of different uses for the particle size of clay-based recycled aggregates can be met; at the same time, the extrusion molding device 11 with a larger particle size is provided at the position closest to the stirring device 9, which is conducive to the residual material conveyed by the residual material conveyor belt 28 to be first extruded into clay-based recycled aggregates with larger particle sizes, and then extruded into clay-based recycled aggregates with smaller particle sizes.

[0052] like Figure 7 As shown, a modular integrated clay-based recycled aggregate production system operation process includes the following steps:

[0053] S1. The mud cake with a moisture content of less than 60% is transported to the loading hopper 15 of the crushing device 7 through the feeding device, and the admixture in the admixture bin 6 is added to the feeding port through the control system 13 according to production needs;

[0054] S2, the crushed mud cake is weighed by the control system 13, and then transported to the mixing device 9 by the bucket elevator 19, and then the weighed binder and additives are added to the mixing device 9 in sequence and stirred, and the stirring time is 3 to 25 minutes;

[0055] S3, the stirred mixed material is passed through the mixed material conveyor belt 10 and the iron remover 20 to remove iron, and then is conveyed to the extrusion molding device 11 through the distributor 21, and the formed clay-based recycled aggregate is vibrated and screened by the aggregate vibrating screen 27 and falls into the clay-based recycled aggregate bin 12, and the remaining material after the vibration screening is conveyed to the mixed material conveyor belt 10 through the remaining material conveyor belt 28;

[0056] S4. After the mixing material on the mixing material conveyor belt 10 is produced, the roller cleaning machine 32 is controlled by the control system 13 to clean the rollers 30.

[0057] Optionally, the extrusion molding device 11 can be controlled by the control system 13 to control the extrusion controller 29, and can also be controlled by the extrusion controller 29 alone.

[0058] Optionally, the produced clay-based recycled aggregate has a 28d cylinder compressive strength greater than 2MPa and a 28d crushing index less than 30%.

[0059] Through a modular integrated clay-based recycled aggregate production system and method, clay-based recycled aggregate that does not require drying is produced on a large scale, effectively solving the technical problem of resource utilization of colloidal waste with high water content, and realizing high-value-added resource utilization of colloidal waste with high water content, providing valuable industrial technology solutions for the high-quality development of industries related to colloidal waste with high water content.

[0060] Example 1

[0061] like Figure 1 and Figure 7 As shown, 60 parts of mud cake with a moisture content of 60% and 10 parts of quicklime powder with a particle size of 0.074 mm are added to the crushing equipment 7, and the crushed materials are lifted to the mixing equipment 9 by the bucket elevator 19. At the same time, 15 parts of 42.5-grade ordinary silicate cement and 5 parts of 42.5-grade fast-hardening sulphoaluminate cement are added to the mixing equipment 9. After stirring for 3 minutes, the mixed material is deironed and divided by the mixing material conveyor 10 and conveyed to the extrusion molding equipment 11. The extruded clay-based recycled aggregate is screened by the aggregate vibrating screen 27 to remove the residual material and fall into the clay-based recycled aggregate bin 12. After curing for 3 days, it is taken out of the bin and stacked for further curing or use; the residual material screened by the aggregate vibrating screen 27 is conveyed to the mixing material conveyor 10 through the residual material conveyor 28 to continue to produce clay-based recycled aggregate; after the production of the mixing material on the mixing material conveyor 10 is completed, the roller cleaning machine 32 is started to clean the rollers 30.

[0062] The appearance of the produced clay-based recycled aggregate is as follows Figure 8 As shown, the 28d cylinder compression strength and crushing index are 3.6MPa and 15% respectively.

[0063] Example 2

[0064] like Figure 1 and Figure 7 As shown, 73 parts of mud cake with a moisture content of 45% and 7 parts of quicklime powder with a particle size of 0.074 mm are added to the crushing equipment 7, and the crushed material is lifted to the mixing equipment 9 by the bucket elevator 19. At the same time, 16 parts of 42.5-grade ordinary Portland cement and 4 parts of dihydrate gypsum powder with a particle size of 0.074 mm are added to the mixing equipment 9. After stirring for 15 minutes, the mixed material is deironed and divided by the mixing material conveyor 10 and conveyed to the extrusion molding equipment 11. The extruded clay-based recycled aggregate is screened by the aggregate vibrating screen 27 to remove the residual material and fall into the clay-based recycled aggregate bin 12. After curing for 3 days, it is taken out of the bin and stacked for further curing or use; the residual material screened by the aggregate vibrating screen 27 is conveyed to the mixing material conveyor 10 through the residual material conveyor 28 to continue to produce clay-based recycled aggregate; after the production of the mixing material on the mixing material conveyor 10 is completed, the roller cleaning machine 32 is started to clean the rollers 30.

[0065] The appearance of the produced clay-based recycled aggregate is as follows Figure 8 As shown, the 28d cylinder compression strength and crushing index are 4.9 MPa and 13% respectively.

[0066] Example 3

[0067] like Figure 1 and Figure 7 As shown, 78 parts of mud cake with a moisture content of 30% and 1 part of stone powder with a particle size of 0.074 mm are added to the crushing equipment 7, and the crushed material is lifted to the mixing equipment 9 by the bucket elevator 19. At the same time, 16 parts of 42.5-grade ordinary silicate cement and 1 part of 42.5-grade rapid hardening ferroaluminate cement are added to the mixing equipment 9. After stirring for 25 minutes, the mixed material is deironed and divided by the mixing material conveyor 10 and conveyed to the extrusion molding equipment 11. The extruded clay-based recycled aggregate is screened by the aggregate vibrating screen 27 to remove the residual material and fall into the clay-based recycled aggregate bin 12. After curing for 3 days, it is taken out of the bin and stacked for further curing or use; the residual material screened by the aggregate vibrating screen 27 is conveyed to the mixing material conveyor 10 through the residual material conveyor 28 to continue to produce clay-based recycled aggregate; after the production of the mixing material on the mixing material conveyor 10 is completed, the roller cleaning machine 32 is started to clean the rollers 30.

[0068] The appearance of the produced clay-based recycled aggregate is as follows Figure 8 As shown, the 28d cylinder compression strength and crushing index are 5.3MPa and 12% respectively.

[0069] Example 4

[0070] like Figure 1 and Figure 7As shown, 68.6 parts of mud cake with a moisture content of 53% and 18 parts of asphalt mixing station waste ash with a particle size of 0.074 mm are added to the crushing device 7, and the crushed material is lifted to the mixing device 9 by the bucket elevator 19. At the same time, 31.4 parts of magnesium oxysulfide gelling material are added to the mixing device 9, wherein the magnesium oxysulfide gelling material contains 98 parts of light-burned magnesium oxide and 42 parts of magnesium sulfate heptahydrate. After stirring for 3 minutes, the mixed material is deironed and separated and conveyed through the mixed material conveyor belt 10. In the extrusion molding equipment 11, the extruded clay-based magnesium recycled aggregate is screened out by the aggregate vibrating screen 27 to remove the residual material and then falls into the clay-based magnesium recycled aggregate bin 12. After curing for 3 days, it is taken out of the bin and stacked for further curing or use; the residual material screened out by the aggregate vibrating screen 27 is conveyed to the mixing material conveyor belt 10 via the residual material conveyor belt 28 to continue to produce clay-based magnesium recycled aggregate; after the mixing material on the mixing material conveyor belt 10 is produced, the roller cleaning machine 32 is started to clean the rollers 30.

[0071] The produced clay-based magnesium recycled aggregate has the following appearance: Figure 8 As shown, the 28d cylinder compression strength and crushing index are 4.2MPa and 15% respectively.

[0072] Example 5

[0073] like Figure 1 and Figure 7 As shown, 72.3 parts of mud cake with a moisture content of 54% and 20 parts of waste slag in the ceramic firing process with a particle size of 0.074 mm are added to the crushing device 7, and the crushed material is lifted to the mixing device 9 by the bucket elevator 19. At the same time, 27.7 parts of magnesium oxysulfide gelling material are added to the mixing device 9, wherein the magnesium oxysulfide gelling material contains 86 parts of light-burned magnesium oxide and 66 parts of magnesium sulfate heptahydrate. After stirring for 15 minutes, the mixed material is removed from the iron and separated by the mixed material conveyor 10. The extruded clay-based magnesium recycled aggregate is transferred to the extrusion molding equipment 11, and the residual material is screened out by the aggregate vibrating screen 27 and then falls into the clay-based magnesium recycled aggregate bin 12. After curing for 3 days, it is taken out of the bin and stacked for further curing or use. The residual material screened out by the aggregate vibrating screen 27 is transferred to the mixing material conveyor belt 10 via the residual material conveyor belt 28 to continue to produce clay-based magnesium recycled aggregate. After the mixing material on the mixing material conveyor belt 10 is produced, the roller cleaning machine 32 is started to clean the rollers 30.

[0074] The produced clay-based magnesium recycled aggregate has the following appearance: Figure 8 As shown, the 28d cylinder compression strength and crushing index are 5.5MPa and 13% respectively.

[0075] Example 6

[0076] like Figure 1 and Figure 7As shown, 80.8 parts of mud cake with a moisture content of 48% and 10 parts of stone powder are added to the crushing device 7, wherein the stone powder is a powder particle with a particle size of 0.074 mm generated during the concrete crushing process. The crushed material is lifted to the mixing device 9 by the bucket elevator 19, and 19.2 parts of magnesium oxychloride gelling material are added to the mixing device 9. The magnesium oxychloride gelling material includes 96 parts of light-burned magnesium oxide, 148 parts of magnesium chloride hexahydrate, and 35 parts of heavy-burned magnesium oxide. After stirring for 25 minutes, the mixed material is passed through the mixing material The conveyor belt 10 is used for iron removal and material separation and is conveyed to the extrusion molding equipment 11. The extruded clay-based magnesium recycled aggregate is screened out by the aggregate vibrating screen 27 to remove the residual material and then falls into the clay-based magnesium recycled aggregate bin 12. After curing for 3 days, it is taken out of the bin and stacked for further curing or use. The residual material screened out by the aggregate vibrating screen 27 is conveyed to the mixing material conveyor belt 10 via the residual material conveyor belt 28 to continue to produce clay-based magnesium recycled aggregate. After the mixing material on the mixing material conveyor belt 10 is produced, the roller cleaning machine 32 is started to clean the rollers 30.

[0077] The produced clay-based magnesium recycled aggregate has the following appearance: Figure 8 As shown, the 28d cylinder compression strength and crushing index are 6.9MPa and 18% respectively.

[0078] When the total installed power of the modular integrated clay-based recycled aggregate production system of the present invention is 400kw, the dimensions are 35m long×10m wide×27m high, and the production capacity reaches 50-80t / h. The present invention is highly integrated and can be upgraded and transformed.

[0079] The clay-based recycled aggregate produced by the equipment of the present invention is prepared by adding colloidal waste with a high water content to an admixture, crushing the admixture, and then adding a binder and an additive before extrusion molding. It has the advantages of fast molding, low manufacturing cost, no waste of raw materials in the molding process, and no drying required. The performance indicators of the clay-based recycled aggregate reach the level of natural aggregates, and it can completely replace natural aggregates. At the same time, colloidal waste with a high water content, such as river silt, is made into clay-based recycled aggregate, which not only reduces the cost of river silt treatment, but also produces value-added products, realizing efficient and high-value-added resource industrial utilization of colloidal waste with a high water content, such as river silt, and providing large-scale industrial equipment and process solutions for the high-quality development of industries related to colloidal waste with a high water content.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the specification of this application, the technicians can still modify or replace the specific implementation mode of the present invention with equivalents, but these modifications or changes do not deviate from the scope of protection of the pending claims of the present application.

Claims

1. A method for using a modular integrated clay-based recycled aggregate production system, characterized in that: The following steps are involved: S1. The mud cake with a moisture content of less than 60% is transported to the hopper of the crushing equipment through the feeding equipment, and the water-absorbing admixture in the admixture bin is added to the feeding port through the control system according to production needs; S2. The crushed mud cake is weighed by the control system and transported to the mixing equipment by the bucket elevator. The weighed binder and additives are then added to the mixing equipment in sequence and stirred for 3 to 25 minutes. S3, the stirred mixture is passed through a mixing material conveyor belt and an iron remover to remove iron, and then is conveyed to an extrusion molding device through a distributor, the formed clay-based recycled aggregate is vibrated and screened by an aggregate vibrating screen and falls into a clay-based recycled aggregate bin, and the remaining material after vibration screening is conveyed to the mixing material conveyor belt through a remaining material conveyor belt; S4. After the mixing material on the mixing material conveyor belt is produced, the roller cleaning machine is controlled by the control system to clean the rollers; The modular integrated clay-based recycled aggregate production system includes: batching module, aggregate manufacturing module and control module; The batching module includes: a binder silo, an additive silo, a blending silo, a crushing device, an automatic metering unit and a mixing device; The aggregate manufacturing module includes: a mixing material conveyor belt, an extrusion molding device and a clay-based recycled aggregate silo; The control module includes: a control system; The binder silo and the additive silo are located above the mixing device, the admixture silo is located above the pulverizing device, and the pulverizing device is located below the mixing device; the binder silo, the additive silo, the admixture silo and the pulverizing device are all provided with the automatic metering unit; the binder silo, the additive silo and the pulverizing device are respectively connected to the mixing device, and the mixing device is connected to the extrusion molding device through a mixing material conveyor belt; the clay-based recycled aggregate silo is located below the extrusion molding device; The control system is connected to the batching module and the aggregate manufacturing module; The extrusion molding equipment comprises: a feed inlet, a pair of roller extrusion device, an aggregate vibrating screen, a residual material conveyor belt and an extrusion controller, wherein the feed inlet is located above the pair of roller extrusion device, the feed inlet is connected to the mixing device through the mixing material conveyor belt, the pair of roller extrusion device is located above the aggregate vibrating screen, the aggregate vibrating screen is located above the residual material conveyor belt, and the extrusion controller is connected to the control system and the extrusion molding equipment; The roller extrusion device comprises: roller wheels, an extrusion motor and a roller cleaning machine, the roller wheels are provided with a plurality of hemispherical grooves on their surfaces, the roller wheels are connected to the extrusion motor, the roller cleaning machine is connected to the extrusion controller, and the roller cleaning machine is located above the roller wheels; The clay-based recycled aggregate is ellipsoidal; The mud cake is a colloidal waste with a high water content.

2. The method for using the modular integrated clay-based recycled aggregate production system according to claim 1, characterized in that: The pulverizing equipment comprises: an upper hopper, an inlet, a pulverizer, and an outlet. The upper hopper is provided with an automatic metering unit. The inlet is located at the front end of the pulverizer, the outlet is located at the rear end of the pulverizer, and the outlet is connected to the mixing equipment through a bucket elevator.

3. The method for using the modular integrated clay-based recycled aggregate production system according to claim 1, characterized in that: An iron remover and a material distributor are arranged on the mixing material conveyor belt, and the iron remover is located on the mixing material conveyor belt between the stirring device and the extrusion molding device; The distributor is located above the extrusion molding equipment; The iron remover comprises: a rake-type rotating electromagnet, an iron chip collector and an iron removal controller, wherein the rake-type rotating electromagnet is connected to the iron chip collector, and the iron removal controller is connected to the rake-type rotating electromagnet, and the lowest point of the rake-type rotating electromagnet is 5 mm away from the upper surface of the mixing material conveyor belt; The iron removal controller is connected to the control system.

4. The method for using the modular integrated clay-based recycled aggregate production system according to claim 1, characterized in that: The aggregate vibrating screen comprises: a screen support, an aggregate screen, a vibration motor, a flexible support and a flexible cover plate, wherein the screen support is located below a double-roll extrusion device, the aggregate screen is located on the screen support, the vibration motor is located above the aggregate screen, the flexible support is connected to the aggregate screen, and the flexible cover plate is connected to the flexible support.

5. The method for using the modular integrated clay-based recycled aggregate production system according to claim 1, characterized in that: There are 5 extrusion molding equipments, including 2 rollers with hemispherical grooves of 10mm in diameter, 2 rollers with hemispherical grooves of 20mm and 1 roller with hemispherical grooves of 30mm, 20mm and 10mm, which are arranged in sequence from near to far from the stirring equipment. The extrusion molding equipments with hemispherical grooves of 30mm, 20mm and 10mm in diameter are arranged in sequence.

6. The method for using a modular integrated clay-based recycled aggregate production system according to claim 1, characterized in that: The extrusion molding equipment is controlled by the control system controlling the extrusion controller, or is controlled by the extrusion controller alone.

7. The method for using a modular integrated clay-based recycled aggregate production system according to claim 1, characterized in that: The produced clay-based recycled aggregate has a 28d cylinder compressive strength greater than 2MPa and a 28d crushing index less than 30%.

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