Production treatment system and method for efficient and comprehensive utilization of fully strong weathered material
By combining screening and crushing and washing systems with fine sand recycling, the problem of unused full-strength weathering materials is solved, and efficient and low-cost washing sand production is achieved, improving product quality and resource utilization.
Patent Information
- Application Number
- CN202510415181.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2025-08-01
AI Technical Summary
Full-strength weathering materials have not been effectively utilized in the construction of green mines, resulting in waste of resources and land degradation, and the cost and quality of existing water-washed sand production processes are unstable.
The screening crushing system, water washing system and fine sand recovery system are adopted, including rod feeder, jaw crusher, circular vibration screen, spiral sand washing machine, wheel bucket sand washing machine, cyclone group and linear dehydration screen. Through the steps of screening, water washing, dehydration, etc., combined with the use of clean water and reused water, the efficient and comprehensive utilization of fully strong weathered materials can be achieved.
It realizes efficient and low-cost production of fully strong weathering materials, improves the quality and resource utilization of water-washed sand, reduces the content of fine particles in the production wastewater, extends the equipment life, and reduces flocculant residues.
Smart Images
Figure CN120394531A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of comprehensive utilization of fully strongly weathered materials, and particularly relates to a production treatment system and method for efficient comprehensive utilization of fully strongly weathered materials. Background Art
[0003] In the construction of green mines, the disposal problem of surface fully strongly weathered materials needs to be solved urgently. As one of the important resources of green mines, fully strongly weathered materials are directly discarded and stockpiled as waste, requiring a large amount of land for stacking, which will not only lead to waste of resources, but also waste and degradation of land resources. Comprehensive utilization of fully strongly weathered materials to produce washed sand is a relatively common disposal method at present. By means of crushing, screening, washing, dehydration, etc., the mud and fine particles in the raw materials of fully strongly weathered materials are removed to obtain washed sand with high economic value, realizing the transformation from waste to treasure. At present, the disposal options for fully strongly weathered materials in each mine are different, the material sources are different, the production processes and flows for comprehensive utilization to produce washed sand are different, and the production costs and product qualities are even more different. The moisture content, mud content and residual flocculant agent content of the finished washed sand directly affect the production cost and the quality of the washed sand.
[0004] The present invention designs a production treatment system and method for efficient comprehensive utilization of fully strongly weathered materials to solve the above problems. Summary of the Invention
[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A production treatment system for efficient comprehensive utilization of fully strongly weathered materials, which includes: a screening and crushing system, a washing system, a fine sand recovery system, a receiving bin, a finished sand bin, a return material bin, and a waste bin; The screening and crushing system includes a bar feeder, a jaw crusher, a circular vibrating screen, an adjusting bin, a pair of roll crushers, and a closed-circuit linear screen. The bar feeder can convey large-particle-size sand and gravel discharged from the receiving bin to the jaw crusher. The circular vibrating screen receives small-particle-size sand and gravel output from the receiving bin, the bar feeder, and the jaw crusher. The receiving bin divides the sand and gravel into three categories according to the particle size and respectively conveys them to the return material bin, the adjusting bin, and the washing system. The adjusting bin, the pair of roll crushers, and the closed-circuit linear screen form a closed-circuit crushing and screening cycle, and the closed-circuit linear screen conveys the sand and gravel meeting the particle size requirements to the washing system; The washing system includes a first-stage spiral sand washer, a second-stage spiral sand washer, a first-stage wheel bucket sand washer, a second-stage wheel bucket sand washer, and a first-stage linear dewatering screen. The first-stage spiral sand washer receives the sand and gravel output from the receiving bin and the closed-circuit linear screen. The first-stage spiral sand washer, the second-stage spiral sand washer, the first-stage wheel bucket sand washer, and the second-stage wheel bucket sand washer are used for sand washing operations, and the first-stage linear dewatering screen is used for dewatering the sand and gravel washed by the second-stage wheel bucket sand washer; The fine sand recovery system includes a primary recovery tank, a secondary recovery tank, a first-stage cyclone group, a second-stage cyclone group, a third-stage cyclone group, a second-stage linear dewatering screen, a third-stage linear dewatering screen, and a third-stage bucket sand washer. The primary recovery tank and the first-stage cyclone group are used to recover fine sand from the production wastewater of the first-stage spiral sand washer and the second-stage spiral sand washer. The secondary recovery tank and the second-stage cyclone group are used to recover fine sand from the production wastewater of the first-stage bucket sand washer, the second-stage bucket sand washer, and the first-stage linear dewatering screen. The third-stage bucket sand washer is used to wash the fine sand recovered by the second-stage cyclone group. The second-stage linear dewatering screen is used to dehydrate the sand and gravel washed by the second-stage cyclone group and the third-stage bucket sand washer. The third-stage cyclone group and the third-stage linear dewatering screen are used to recover and dehydrate the fine sand from the production wastewater of the second-stage linear dewatering screen and the third-stage bucket sand washer; The fine sand output by the first-stage linear dewatering screen and the second-stage linear dewatering screen is transported to the finished sand bin. If the fine sand output by the second-stage cyclone group meets the quality requirements, it is transported to the second-stage linear dewatering screen. If the fine sand output by the second-stage cyclone group does not meet the quality requirements, it is transported to the waste bin. If the fine sand output by the third-stage linear dewatering screen meets the quality requirements, it is transported to the finished sand bin. If the fine sand output by the third-stage linear dewatering screen does not meet the quality requirements, it is transported to the waste bin.
[0006] As a preferred solution, it includes a clear water tank and a recycled water tank. The water used by the second-stage bucket sand washer, the third-stage bucket sand washer, the first-stage linear dewatering screen, the second-stage linear dewatering screen, and the third-stage linear dewatering screen is supplied by the clear water tank. The water used by the circular vibrating screen, the first-stage spiral sand washer, the second-stage spiral sand washer, and the first-stage bucket sand washer is supplied by the recycled water tank.
[0007] As a preferred solution, it includes a wastewater treatment system. The wastewater treatment system supplies water to the recycled water tank. The wastewater of the first-stage spiral sand washer and the second-stage spiral sand washer will enter the wastewater treatment system successively through the primary recovery tank and the first-stage cyclone group. The production wastewater of the first-stage bucket sand washer, the second-stage bucket sand washer, and the first-stage linear dewatering screen enters the wastewater treatment system successively through the secondary recovery tank and the second-stage cyclone group. The production wastewater of the second-stage linear dewatering screen and the third-stage bucket sand washer enters the wastewater treatment system after passing through the third-stage cyclone group. The production wastewater of the third-stage linear dewatering screen directly enters the wastewater treatment system.
[0008] As a preferred solution, a grid screen is installed in the receiving bin. The grid screen divides the inside of the receiving bin into a small particle size bin and a large particle size bin. The sand and gravel smaller than 30mm are stored in the small particle size bin, and the sand and gravel greater than or equal to 30mm are stored in the large particle size bin.
[0009] As a preferred solution, the circular vibrating screen has two layers of screen meshes. The aperture of the upper layer of the screen mesh is 30mm, and the aperture of the lower layer of the screen mesh is 3mm. The aperture of the screen mesh of the closed-circuit linear screen is 4.75mm.
[0010] A production and treatment method for the efficient comprehensive utilization of fully highly weathered materials, comprising the following steps: Step 1: The large-sized sand and gravel discharged from the receiving bin are screened by a bar feeder. The large-sized sand and gravel with a particle size greater than or equal to 30 mm are conveyed by the bar feeder to a jaw crusher for crushing. The small-sized sand and gravel with a particle size less than 30 mm discharged from the receiving bin, the bar feeder, and the jaw crusher are conveyed to a circular vibrating screen. Step 2: The circular vibrating screen conducts high-pressure water washing on the sand and gravel and classifies the sand and gravel into three particle sizes of sand and gravel, namely greater than 30 mm, 30 - 3 mm, and less than 3 mm. The sand and gravel greater than 30 mm are conveyed to the return bin. The sand and gravel of 30 - 3 mm are subjected to cyclic crushing treatment by an adjustable bin, a pair of roller crushers, and a closed-circuit linear screen. The closed-circuit linear screen conveys the sand and gravel with a particle size less than 4.75 mm screened out to a water washing system, and the sand and gravel less than 3 mm are conveyed to the water washing system. Step 3: According to the mud content of the sand and gravel, water washing treatment is carried out by a first-stage spiral sand washer, a second-stage spiral sand washer, a first-stage wheel bucket sand washer, and a second-stage wheel bucket sand washer in the water washing system. Finally, the sand and gravel after being washed by the second-stage wheel bucket sand washer are dehydrated by a first-stage linear dewatering screen and then enter the finished product bin. Step 4: The production wastewater from washing sand by the first-stage spiral sand washer and the second-stage spiral sand washer enters the first-stage recovery pond for collection and recovery, and then is pumped to a first-stage hydrocyclone group for fine sand recovery. The production wastewater from washing sand by the first-stage wheel bucket sand washer and the second-stage wheel bucket sand washer, as well as the wastewater after dehydration by the first-stage linear dewatering screen, enter the second-stage recovery pond for collection and recovery, and then are pumped to a second-stage hydrocyclone group for fine sand recovery. The production wastewater from the third-stage wheel bucket sand washer and the second-stage linear dewatering screen enters the third-stage hydrocyclone group for fine sand recovery. As a preferred solution, in Step 3, according to the mud content of the sand and gravel, there are three sand washing steps. The first one is to conduct water washing treatment successively by a first-stage spiral sand washer, a second-stage spiral sand washer, a first-stage wheel bucket sand washer, and a second-stage wheel bucket sand washer. The second one is to conduct water washing treatment successively by a first-stage spiral sand washer, a first-stage wheel bucket sand washer, and a second-stage wheel bucket sand washer. The third one is to conduct water washing treatment successively by a first-stage spiral sand washer and a second-stage wheel bucket sand washer.
[0011] As a preferred solution, in Step 4, the fine sand recovered by the first-stage hydrocyclone group is the first-stage recovered sand. After the first-stage hydrocyclone group conducts fine sand recovery, the generated wastewater enters the subsequent wastewater treatment system for treatment. The recovered fine sand enters the third-stage wheel bucket sand washer for sand washing operation, and then is dehydrated by the second-stage linear dewatering screen and enters the finished sand bin.
[0012] As a preferred solution, the fine sand recovered by the second-stage cyclone group is the second-stage recovered sand. After the second-stage cyclone group recovers the fine sand, the generated wastewater enters the wastewater treatment system at the back end for treatment. The fine sand recovered by the third-stage cyclone group is the third-stage recovered sand. After the third-stage cyclone group recovers the fine sand, the generated wastewater enters the wastewater treatment system at the back end for treatment.
[0013] As a preferred solution, if the quality of the second-stage recovered sand and the third-stage recovered sand is good, the second-stage recovered sand enters the finished sand bin after being dewatered by the second-stage straight-line dewatering screen, and the third-stage recovered sand enters the finished sand bin after being dewatered by the third-stage straight-line dewatering screen. If the quality of the second-stage recovered sand and the third-stage recovered sand is poor, the second-stage recovered sand is directly transported to the waste bin, and the third-stage recovered sand enters the waste bin after being dewatered by the third-stage straight-line dewatering screen without adding water.
[0014] Compared with the existing technology, the advantages of the present invention are as follows: 1. The present invention adopts flushing screening, a roller crusher in a closed circuit, double-stage spiral sand washing, double-stage bucket wheel sand washing, and a combination of cyclone groups and straight-line dewatering screens that cooperate with each other to achieve the low-cost operation of the water-washed sand system for the production of fully strongly weathered materials, with high efficiency and high quality production, and has the advantage of wide applicability.
[0015] 2. In the crushing of the roller crusher and the screening of the closed-circuit straight-line screen in the present invention, it not only solves the problem of undispersed mud lumps after screening and flushing, but also repeatedly crushes some sand and gravel with a low crushing value, improves the product quality, and realizes the efficient utilization of fully strongly weathered materials.
[0016] 3. According to the mud content of the materials, the present invention flexibly selects the water-washing steps in the water-washing system and flexibly configures the water-washing combination modes of the first-stage spiral sand washer, the second-stage spiral sand washer, the first-stage wheel bucket sand washer, and the second-stage wheel bucket sand washer, improves the adaptability of the system, and reduces the production cost.
[0017] 4. The sand washing link of the spiral sand washer in the present invention is arranged before the fine sand link of the wheel bucket sand washer. Using the rubbing, stirring, and pushing capabilities of the rotating blades, it is suitable for the initial washing link with a high mud content in fully strongly weathered materials, and improves the mud removal and sand washing effect of the system. 5. The present invention sets up three levels of recovery systems. The fine sand recovered by the first-stage cyclone group is the first-stage recovered sand, the fine sand recovered by the second-stage cyclone group is the second-stage recovered sand, and the fine sand recovered by the third-stage cyclone group is the third-stage recovered sand. Different levels of recovered sand adopt different recovery treatment methods, realizing the efficient utilization of fully strongly weathered materials and reducing resource waste.
[0018] 6. Before entering the finished sand bin, both the sand washing and dewatering links in the present invention use clean water without wastewater treatment. While avoiding the phenomenon of water-washed sand agglomeration, it reduces the residual flocculant drugs and improves the product quality.
[0019] 7. All the wastewater generated in the sand washing process of the present invention enters the wastewater treatment system after fine sand recovery, reducing the content of fine particles in the production wastewater, which not only reduces the dosage of flocculants in the wastewater treatment system but also reduces the wear of the fine particles on the backend filter press equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a process schematic diagram of the present invention.
[0021] Figure 2 is a process schematic diagram of the flow direction of the sand and gravel materials of the present invention.
[0022] Figure 3 is a process schematic diagram of the flow direction of the clear water of the present invention.
[0023] Figure 4 is a process schematic diagram of the flow direction of the recycled water of the present invention.
[0024] Figure 5 is a process schematic diagram of the flow direction of the wastewater of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] The following further describes in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments or drawings are used to illustrate the present invention but not to limit the scope of the present invention.
[0026] A production and treatment system for the efficient comprehensive utilization of all-strongly weathered materials, as Figures 1 to 5 shown, includes: a screening and crushing system, a water washing system, a fine sand recovery system, a receiving bin, a finished sand bin, a return bin, and a waste bin; The screening and crushing system includes a bar feeder, a jaw crusher, a circular vibrating screen, an adjustment bin, a pair of roll crushers, and a closed-circuit linear screen. The bar feeder can convey the large-particle-size sand and gravel discharged from the receiving bin to the jaw crusher. The circular vibrating screen receives the small-particle-size sand and gravel output from the receiving bin, the bar feeder, and the jaw crusher. The receiving bin divides the sand and gravel into three categories according to the particle size and conveys them to the return bin, the adjustment bin, and the water washing system respectively. The adjustment bin, the pair of roll crushers, and the closed-circuit linear screen form a closed-circuit crushing and screening cycle, and the closed-circuit linear screen conveys the sand and gravel meeting the particle size requirements to the water washing system; The water washing system includes a first-stage spiral sand washer, a second-stage spiral sand washer, a first-stage wheel bucket sand washer, a second-stage wheel bucket sand washer, and a first-stage linear dewatering screen. The first-stage spiral sand washer receives the sand and gravel output from the receiving bin and the closed-circuit linear screen. The first-stage spiral sand washer, the second-stage spiral sand washer, the first-stage wheel bucket sand washer, and the second-stage wheel bucket sand washer are used for sand washing operations, and the first-stage linear dewatering screen is used for dewatering the sand and gravel washed by the second-stage wheel bucket sand washer; The fine sand recovery system includes a primary recovery tank, a secondary recovery tank, a first-stage cyclone group, a second-stage cyclone group, a third-stage cyclone group, a second-stage linear dewatering screen, a third-stage linear dewatering screen, and a third-stage bucket sand washer. The primary recovery tank and the first-stage cyclone group are used to recover fine sand from the production wastewater of the first-stage spiral sand washer and the second-stage spiral sand washer. The secondary recovery tank and the second-stage cyclone group are used to recover fine sand from the production wastewater of the first-stage bucket sand washer, the second-stage bucket sand washer, and the first-stage linear dewatering screen. The third-stage bucket sand washer is used to wash the fine sand recovered by the second-stage cyclone group. The second-stage linear dewatering screen is used to dehydrate the sand and gravel washed by the second-stage cyclone group and the third-stage bucket sand washer. The third-stage cyclone group and the third-stage linear dewatering screen are used to recover and dehydrate the fine sand from the production wastewater of the second-stage linear dewatering screen and the third-stage bucket sand washer. The fine sand output by the first-stage linear dewatering screen and the second-stage linear dewatering screen is transported to the finished sand bin. If the fine sand output by the second-stage cyclone group meets the quality requirements, it is transported to the second-stage linear dewatering screen. If the fine sand output by the second-stage cyclone group does not meet the quality requirements, it is transported to the waste bin. If the fine sand output by the third-stage linear dewatering screen meets the quality requirements, it is transported to the finished sand bin. If the fine sand output by the third-stage linear dewatering screen does not meet the quality requirements, it is transported to the waste bin.
[0027] It also includes a control center with PLC control function, which is used to realize the linkage between devices. Devices such as the circular vibrating screen, the pair-roller machine, the closed-circuit linear screen, each spiral sand washer, each bucket sand washer, each linear dewatering screen, and each cyclone group are all controlled by the control center. In addition, according to the mud content and cleaning condition of the sand and gravel materials, the water washing system controls the opening of the chute feeding channel through the control center, so as to realize the selection of the number of sand washing links, control the fine sand steps, and most of the material transportation between devices is realized by the belt conveyor.
[0028] As Figure 3 and Figure 4 shown, it includes a clean water tank and a recycled water tank. The water used by the second-stage bucket sand washer, the third-stage bucket sand washer, the first-stage linear dewatering screen, the second-stage linear dewatering screen, and the third-stage linear dewatering screen is supplied by the clean water tank. The water used by the circular vibrating screen, the first-stage spiral sand washer, the second-stage spiral sand washer, and the first-stage bucket sand washer is supplied by the recycled water tank.
[0029] As Figure 5 shown, it includes a wastewater treatment system. The recycled water treated by the wastewater treatment system is supplied to the recycled water tank. The wastewater of the first-stage spiral sand washer and the second-stage spiral sand washer will enter the wastewater treatment system through the primary recovery tank and the first-stage cyclone group in sequence. The production wastewater of the first-stage bucket sand washer, the second-stage bucket sand washer, and the first-stage linear dewatering screen will enter the wastewater treatment system through the secondary recovery tank and the second-stage cyclone group in sequence. The production wastewater of the second-stage linear dewatering screen and the third-stage bucket sand washer will enter the wastewater treatment system after passing through the third-stage cyclone group. The production wastewater of the third-stage linear dewatering screen is directly fed into the wastewater treatment system.
[0030] A grizzly screen is installed in the receiving bin. The grizzly screen divides the inside of the receiving bin into a small particle size bin and a large particle size bin. Sands and gravels smaller than 30 mm are stored in the small particle size bin, and sands and gravels greater than or equal to 30 mm are stored in the large particle size bin. The circular vibrating screen has two layers of screen meshes. The aperture of the upper layer of screen mesh is 30 mm, and the aperture of the lower layer of screen mesh is 3 mm. The aperture of the screen mesh of the closed-circuit linear screen is 4.75 mm. A level gauge is arranged in the receiving bin to realize the linkage control between the stock of the front-end materials and the equipment, save energy and reduce consumption, and reduce the operation cost.
[0031] A working method of a production and treatment system for the efficient comprehensive utilization of all-strongly weathered materials includes the following steps: Step 1: The large particle size sands and gravels discharged from the receiving bin are screened by a bar feeder. The large particle size sands and gravels greater than or equal to 30 mm are conveyed by the bar feeder to a jaw crusher for crushing. The small particle size sands and gravels smaller than 30 mm discharged from the receiving bin, the bar feeder, and the jaw crusher are conveyed to the circular vibrating screen. Step 2: The circular vibrating screen conducts high-pressure water washing on the sands and gravels and classifies the sands and gravels into three particle size grades of sands and gravels, namely greater than 30 mm, 30 - 3 mm, and less than 3 mm. The sands and gravels greater than 30 mm are conveyed to the return bin. The sands and gravels of 30 - 3 mm are subjected to cyclic crushing treatment by an adjustable bin, a pair of roll crushers, and a closed-circuit linear screen. The closed-circuit linear screen conveys the screened sands and gravels smaller than 4.75 mm to a water washing system, and those smaller than 3 mm are conveyed to the water washing system. The sands and gravels in the return bin are centrally conveyed back to the receiving bin by a loader and a dump truck for re-performing the crushing and screening process. Step 3: According to the mud content of the sands and gravels, they are subjected to water washing treatment by a first-stage screw sand washer, a second-stage screw sand washer, a first-stage bucket wheel sand washer, and a second-stage bucket wheel sand washer in the water washing system. Finally, the sands and gravels after being washed by the second-stage bucket wheel sand washer are dehydrated by a first-stage linear dewatering screen and then enter the finished product bin. Step 4: The production wastewater from the first-stage screw sand washer and the second-stage screw sand washer for sand washing enters the first-stage recovery pool for collection and recovery, and then is pumped to a first-stage hydrocyclone group for fine sand recovery. The production wastewater from the first-stage bucket wheel sand washer and the second-stage bucket wheel sand washer for sand washing, as well as the wastewater after dehydration by the first-stage linear dewatering screen, enter the second-stage recovery pool for collection and recovery, and then are pumped to a second-stage hydrocyclone group for fine sand recovery. The production wastewater from the third-stage bucket wheel sand washer and the second-stage linear dewatering screen enters a third-stage hydrocyclone group for fine sand recovery.
[0032] In Step 3, according to the mud content of the sands and gravels, there are three sand washing steps, The first one is to conduct water washing treatment successively by a first-stage screw sand washer, a second-stage screw sand washer, a first-stage bucket wheel sand washer, and a second-stage bucket wheel sand washer; The second method is to perform water washing treatment successively with a first-stage spiral sand washer, a first-stage bucket wheel sand washer, and a second-stage bucket wheel sand washer; The third method is to perform water washing treatment successively with a first-stage spiral sand washer and a second-stage bucket wheel sand washer.
[0033] In step four, the fine sand recovered by the first-stage cyclone group is the first-stage recovered sand. After the first-stage cyclone group recovers the fine sand, the generated wastewater enters the subsequent wastewater treatment system for treatment. The recovered fine sand enters the third-stage bucket wheel sand washer for sand washing operation, and then enters the finished sand bin after dehydration by the second-stage linear dewatering screen.
[0034] The fine sand recovered by the second-stage cyclone group is the second-stage recovered sand. After the second-stage cyclone group recovers the fine sand, the generated wastewater enters the subsequent wastewater treatment system for treatment. The fine sand recovered by the third-stage cyclone group is the third-stage recovered sand. After the third-stage cyclone group recovers the fine sand, the generated wastewater enters the subsequent wastewater treatment system for treatment.
[0035] If the quality of the second-stage recovered sand and the third-stage recovered sand is good, the second-stage recovered sand enters the finished sand bin after dehydration by the second-stage linear dewatering screen, and the third-stage recovered sand enters the finished sand bin after dehydration by the third-stage linear dewatering screen. If the quality of the second-stage recovered sand and the third-stage recovered sand is poor, the second-stage recovered sand is directly transported to the waste bin, and the third-stage recovered sand enters the waste bin after dehydration by the third-stage linear dewatering screen without adding water.
[0036] In the above process, before all the finished sand enters the bin, clear water from the clear water tank that has not undergone wastewater treatment is added for cleaning to reduce the residual flocculant in the finished sand and improve the product quality. All production wastewater enters the wastewater treatment system after the first-stage cyclone group, the second-stage cyclone group, and the third-stage cyclone group recover the fine sand, maximizing the value of the fully weathered material resources, reducing the content of fine particles in the wastewater, extending the service life of the pressure filtration equipment in the subsequent wastewater treatment system, and reducing the operating cost.
[0037] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention falls within the protection scope of the present invention.
Claims
1. A production and treatment system for the efficient comprehensive utilization of fully strongly weathered materials, characterized in that Including: A screening and crushing system, a water washing system, a fine sand recovery system, a receiving bin, a finished sand bin, a return material bin, and a waste bin; The screening and crushing system includes a bar feeder, a jaw crusher, a circular vibrating screen, a regulating bin, a pair of roll crushers, and a closed-circuit linear screen. The bar feeder can convey large-sized sand and gravel discharged from the receiving bin to the jaw crusher. The circular vibrating screen receives small-sized sand and gravel output from the receiving bin, the bar feeder, and the jaw crusher. The receiving bin classifies the sand and gravel into three categories according to particle size and conveys them to the return material bin, the regulating bin, and the water washing system respectively. The regulating bin, the pair of roll crushers, and the closed-circuit linear screen form a closed-circuit crushing and screening cycle. The closed-circuit linear screen conveys the sand and gravel meeting the particle size requirements to the water washing system; The water washing system includes a first-stage spiral sand washer, a second-stage spiral sand washer, a first-stage wheel sand washer, a second-stage wheel sand washer, and a first-stage linear dewatering screen. The first-stage spiral sand washer receives the sand and gravel output from the receiving bin and the closed-circuit linear screen. The first-stage spiral sand washer, the second-stage spiral sand washer, the first-stage wheel sand washer, and the second-stage wheel sand washer are used for sand washing operations. The first-stage linear dewatering screen is used for dewatering the sand and gravel washed by the second-stage wheel sand washer; The fine sand recovery system includes a first-stage recovery pond, a second-stage recovery pond, a first-stage hydrocyclone group, a second-stage hydrocyclone group, a third-stage hydrocyclone group, a second-stage linear dewatering screen, a third-stage linear dewatering screen, and a third-stage wheel sand washer. The first-stage recovery pond and the first-stage hydrocyclone group are used to recover the fine sand in the production wastewater of the first-stage spiral sand washer and the second-stage spiral sand washer. The second-stage recovery pond and the second-stage hydrocyclone group are used to recover the fine sand in the production wastewater of the first-stage wheel sand washer, the second-stage wheel sand washer, and the first-stage linear dewatering screen. The third-stage wheel sand washer is used to wash the fine sand recovered by the second-stage hydrocyclone group. The second-stage linear dewatering screen is used for dewatering the sand and gravel washed by the second-stage hydrocyclone group and the third-stage wheel sand washer. The third-stage hydrocyclone group and the third-stage linear dewatering screen are used to recover and dewater the fine sand in the production wastewater of the second-stage linear dewatering screen and the third-stage wheel sand washer; The fine sand output from the first-stage linear dewatering screen and the second-stage linear dewatering screen is conveyed to the finished sand bin. If the fine sand output from the second-stage hydrocyclone group meets the quality requirements, it is conveyed to the second-stage linear dewatering screen. If the fine sand output from the second-stage hydrocyclone group does not meet the quality requirements, it is conveyed to the waste bin. If the fine sand output from the third-stage linear dewatering screen meets the quality requirements, it is conveyed to the finished sand bin. If the fine sand output from the third-stage linear dewatering screen does not meet the quality requirements, it is conveyed to the waste bin.
2. The production and treatment system for efficient comprehensive utilization of all-strongly weathered materials according to claim 1, wherein: Including a clear water pond and a recycled water pond. The water used by the second-stage wheel sand washer, the third-stage wheel sand washer, the first-stage linear dewatering screen, the second-stage linear dewatering screen, and the third-stage linear dewatering screen is supplied by the clear water pond. The water used by the circular vibrating screen, the first-stage spiral sand washer, the second-stage spiral sand washer, and the first-stage wheel sand washer is supplied by the recycled water pond.
3. The production and treatment system for efficient comprehensive utilization of all-strongly weathered materials according to claim 2, characterized in that: It includes a wastewater treatment system, which supplies water to a recycled water tank. The wastewater from the 1st-stage spiral sand washer and the 2nd-stage spiral sand washer will successively pass through a primary recovery tank and a 1st-stage cyclone group and enter the wastewater treatment system. The production wastewater from the 1st-stage bucket wheel sand washer, the 2nd-stage bucket wheel sand washer, and the 1st-stage straight dewatering screen will successively pass through a secondary recovery tank and a 2nd-stage cyclone group and enter the wastewater treatment system. The production wastewater from the 2nd-stage straight dewatering screen and the 3rd-stage bucket wheel sand washer will enter the wastewater treatment system after passing through a 3rd-stage cyclone group. The production wastewater from the 3rd-stage straight dewatering screen will directly be fed into the wastewater treatment system.
4. The production and treatment system for efficient comprehensive utilization of all highly weathered materials according to claim 1, characterized in that: A grizzly screen is installed in the receiving hopper. The grizzly screen divides the inside of the receiving hopper into a small-particle-size hopper and a large-particle-size hopper. Sands smaller than 30 mm are stored in the small-particle-size hopper, and sands greater than or equal to 30 mm are stored in the large-particle-size hopper.
5. The production and treatment system for efficient comprehensive utilization of all-strongly weathered materials according to claim 4, characterized in that: The circular vibrating screen has two layers of screen meshes. The aperture of the upper-layer screen mesh is 30 mm, and the aperture of the lower-layer screen mesh is 3 mm. The screen mesh aperture of the closed-circuit straight-line screen is 4.75 mm.
6. The working method of a production and treatment system for the efficient comprehensive utilization of all-strongly weathered materials according to claim 1, characterized in that, It includes the following steps: Step 1: The large-particle-size sands discharged from the receiving hopper are screened by a bar feeder. The large-particle-size sands greater than or equal to 30 mm are conveyed by the bar feeder to a jaw crusher for crushing. The small-particle-size sands smaller than 30 mm discharged from the receiving hopper, the bar feeder, and the jaw crusher are conveyed to the circular vibrating screen. Step 2: The circular vibrating screen performs high-pressure water flushing on the sands and classifies the sands into three particle-size sands, namely, greater than 30 mm, 30 - 3 mm, and smaller than 3 mm. The sands greater than 30 mm are conveyed to a return hopper. The sands of 30 - 3 mm are subjected to cyclic crushing treatment by an adjusting hopper, a pair of roller crushers, and a closed-circuit straight-line screen. The closed-circuit straight-line screen conveys the screened sands smaller than 4.75 mm to a water washing system, and the sands smaller than 3 mm are conveyed to the water washing system. Step 3: According to the mud content of the sands, the 1st-stage spiral sand washer, the 2nd-stage spiral sand washer, the 1st-stage bucket wheel sand washer, and the 2nd-stage bucket wheel sand washer in the water washing system perform water washing treatment. Finally, the sands after being washed by the 2nd-stage bucket wheel sand washer are dehydrated by a 1st-stage straight dewatering screen and then enter a finished product hopper. Step 4: The production wastewater from the 1st-stage spiral sand washer and the 2nd-stage spiral sand washer during sand washing is collected and recovered in a 1st-stage recovery tank, and then pumped to a 1st-stage cyclone group for fine sand recovery. The production wastewater from the 1st-stage bucket wheel sand washer and the 2nd-stage bucket wheel sand washer during sand washing, as well as the wastewater after dehydration by the 1st-stage straight dewatering screen, are collected and recovered in a 2nd-stage recovery tank, and then pumped to a 2nd-stage cyclone group for fine sand recovery. The production wastewater from the 3rd-stage bucket wheel sand washer and the 2nd-stage straight dewatering screen enters a 3rd-stage cyclone group for fine sand recovery.
7. A production and treatment working method for the efficient comprehensive utilization of all-strongly weathered materials according to claim 6, characterized in that: In Step 3, according to the mud content of the sands, there are three sand washing steps, The first one is to perform water washing treatment successively by the 1st-stage spiral sand washer, the 2nd-stage spiral sand washer, the 1st-stage bucket wheel sand washer, and the 2nd-stage bucket wheel sand washer; The second one is to perform water washing treatment successively by the 1st-stage spiral sand washer, the 1st-stage bucket wheel sand washer, and the 2nd-stage bucket wheel sand washer; The third one is to perform water washing treatment successively by the 1st-stage spiral sand washer and the 2nd-stage bucket wheel sand washer.
8. The production and treatment working method for the efficient comprehensive utilization of all highly weathered materials according to claim 6, characterized in that: In Step 4, the fine sand recovered by the first-stage cyclone group is the first-stage recovered sand. After the first-stage cyclone group recovers the fine sand, the generated wastewater enters the subsequent wastewater treatment system for treatment. The recovered fine sand enters the third-stage bucket sand washer for sand washing operation, and then enters the finished sand bin after dehydration by the second-stage linear dewatering screen.
9. A production and treatment working method for the efficient comprehensive utilization of all highly weathered materials according to claim 8, characterized in that: The fine sand recovered by the second-stage cyclone group is the second-stage recovered sand. After the second-stage cyclone group recovers the fine sand, the generated wastewater enters the subsequent wastewater treatment system for treatment. The fine sand recovered by the third-stage cyclone group is the third-stage recovered sand. After the third-stage cyclone group recovers the fine sand, the generated wastewater enters the subsequent wastewater treatment system for treatment.
10. A production and treatment working method for the efficient comprehensive utilization of all highly weathered materials according to claim 9, characterized in that: If the quality of the second-stage recovered sand and the third-stage recovered sand is good, the second-stage recovered sand enters the finished sand bin after dehydration by the second-stage linear dewatering screen, and the third-stage recovered sand enters the finished sand bin after dehydration by the third-stage linear dewatering screen. If the quality of the second-stage recovered sand and the third-stage recovered sand is poor, the second-stage recovered sand is directly transported to the waste bin, and the third-stage recovered sand enters the waste bin after dehydration by the third-stage linear dewatering screen without adding water.