Limestone tailing treatment system

Abstract

The invention discloses a limestone tailing treatment system. The limestone tailing treatment system is implemented by the following steps: step 1, crushing limestone tailings by adopting a crusher; 2, carrying out primary sand washing treatment on the materials crushed in the step 1 by adopting a sand washing machine; 3, performing primary screening on the materials generated in the step 2 by adopting a screening machine; fourthly, water obtained after primary sand washing in the second step is subjected to precipitation separation and circulated into the sand washing machine in the second step; 5, carrying out secondary sand washing on the material generated in the step 3; sixthly, muddy water generated by secondary sand washing in the fifth step is introduced into muddy water obtained after primary sand washing treatment, and precipitation separation is conducted on the muddy water and the muddy water; seventhly, the materials generated in the fifth step are screened for the second time; and 8, backfilling a product obtained after precipitation separation in the step 4. According to the treatment system, the limestone tailings are subjected to multiple treatment procedures of crushing, screening, water circulation treatment and sand washing, all products have no influence on the environment, treatment is efficient, energy is saved, and the environment is protected.

Description

Technical Field

[0001] The invention belongs to the technical field of stone tailings treatment, and in particular relates to a limestone tailings treatment system. Background Art

[0002] During the limestone mining process, a large amount of tailings soil will be produced. These tailings soils often contain high concentrations of heavy metal ions, pH imbalance, and lack of organic matter. The accumulation of tailings not only occupies land resources, but may also pollute the surrounding ecological environment. Traditional treatment methods often directly discard or simply treat them, which have many disadvantages such as low efficiency, high energy consumption, poor environmental protection, long treatment cycle, and unsatisfactory recovery effect!

[0003] Therefore, it is particularly important to develop an efficient, economical and environmentally friendly limestone tailings treatment system and technology. Summary of the invention

[0004] The object of the present invention is to provide a limestone tailings treatment system to solve the problems raised in the above background technology.

[0005] In view of this, the present invention provides a limestone tailings treatment system, which implements the following steps:

[0006] Step 1: Use a crusher to crush the limestone tailings;

[0007] Step 2: Use a sand washing machine to wash the material crushed in step 1;

[0008] Step 3: Use a screening machine to perform primary screening on the material produced in step 2;

[0009] Step 4: Separate and precipitate the water from the first sand washing in step 2 and circulate it into the sand washing machine in step 2;

[0010] Step 5: The material produced after step 3 is subjected to secondary sand washing;

[0011] Step 6: The muddy water produced by the secondary sand washing in step 5 is connected to the muddy water after the primary sand washing treatment and is subjected to sedimentation separation;

[0012] Step 7: Perform secondary screening on the material produced in step 5;

[0013] Step 8: Backfill the product after precipitation and separation in step 4.

[0014] A further embodiment of the present invention is that in the step 2, the material crushed in the step 1 is subjected to a sand washing process by a spiral sand washing machine, and a mixture of muddy water and stone is generated after the sand washing process.

[0015] A further implementation scheme of the present invention is that the stone mixture material and muddy water produced in step two are subjected to primary screening through step three, and muddy sand, large stones and fine stones are initially screened out. Part of the muddy water produced by sand washing in step two enters the muddy sand, and this part of the muddy sand enters the secondary sand washing in step five through a conveying device.

[0016] A further implementation scheme of the present invention is that the large stones screened in step three are crushed by a crusher to produce corresponding sand and gravel, the fine stones are formed into sand and gravel by a sand making machine, and the formed sand and gravel enter step five for secondary sand washing.

[0017] A further implementation scheme of the present invention is that in step four, the muddy water produced in step two is passed into a primary sedimentation tank, and then separated into water and mud by a mud-water separator. The water is passed into a water storage tank after secondary sedimentation in a secondary sedimentation tank, and water is supplied to a spiral sand washing machine from the water storage tank. Organic matter and microorganisms are added to the mud produced by the mud-water separator and finally backfilled.

[0018] A further implementation scheme of the present invention is that in the step five, a drum sand washing machine is used for secondary sand washing, the drum sand washing machine receives mud and sand transmitted from the conveying device and sand and gravel produced by primary screening for secondary sand washing, the muddy water produced by the drum sand washing machine is passed into the primary sedimentation tank, the water storage tank is connected to the drum sand washing machine through a pipeline, and a water pump is provided on the pipeline.

[0019] A further embodiment of the present invention is that in step seven, machine-made sand and crushed stone sand are produced through secondary screening.

[0020] A further implementation scheme of the present invention is that the spiral sand washing machine includes a hopper, a support seat is provided at the bottom of the hopper, the hopper is arranged obliquely, the two ends of the hopper are respectively a feed end and a discharge end, the height of the feed end is lower than the height of the discharge end, the feed end is used for feeding materials after the limestone tailings are crushed, and two groups of sand washing components are rotatably arranged in the hopper, and the materials are washed by the rotation of the two groups of sand washing components and transported from the feed end to the discharge end, and a discharge hole is opened at the bottom of the hopper near the discharge end, and the stone mixture material is separated and sent out through the discharge end, and the mud and water are discharged from the discharge hole.

[0021] A further implementation scheme of the present invention is that the two groups of sand washing components are arranged oppositely, and the sand washing components include a motor and a rotating shaft, the motor is fixed outside the hopper, the rotating shaft is rotatably arranged in the hopper and one end is connected to the motor drive, the rotating shaft is provided with a blade along a spiral direction, the paddle is provided with a water outlet, the water outlet connects the inside of the paddle with the inside of the rotating shaft, and a joint connected to the inside of the rotating shaft is provided on the outside of the other end of the hopper, and the water in the water storage tank is passed into the rotating shaft through the joint.

[0022] A further embodiment of the present invention is that a material channel is arranged on the top of the hopper at one end of the feed end, and the material channel is arranged obliquely, and the stone mixture material falls into the material channel and slides into the hopper.

[0023] The beneficial effects of the present invention are:

[0024] This treatment system processes the limestone tailings of construction waste through multiple processes including crushing, screening, water recycling and sand washing. Part of the final product can be recycled and part can be used as backfill. The water generated is recycled into the treatment system. All products have no impact on the environment and can be reused. The treatment is efficient, energy-saving and environmentally friendly.

[0025] Specifically, the limestone tailings are fed into a crusher to be broken into smaller materials, and then into a spiral sand washing machine for primary sand washing. The generated mud and water enters the primary sedimentation tank for sedimentation, and then passes through a mud and water separator for mud and water separation. Organic matter and microorganisms are added to the soil and finally backfilled. The water enters the secondary sedimentation tank for sedimentation and is stored in the water storage tank. The water storage tank circulates the water into the spiral sand washing tank for reuse. The materials processed by the spiral sand washing machine enter the screening machine for one-time screening into mud, sand, large stone and fine stone. The large stone enters the crusher for further crushing into sand and gravel, and the fine stone is made into sand and gravel by a sand making machine. The stone enters the drum sand washing machine, and the mud and sand enter the drum sand washing machine through a conveying device. The drum sand washing machine performs secondary sand washing and then performs secondary screening into machine-made sand and crushed stone sand for recycling. The generated mud and water enters the primary sedimentation tank for sedimentation, and the water recovered in the water storage tank is supplied to the drum sand washing machine for secondary sand washing through a pipeline. The processing process is efficient, the product is harmless to the environment, and can be recycled for energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the composition of the limestone tailings treatment system of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the spiral sand washing machine of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0029] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0031] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0032] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0033] Example 1

[0034] like Figure 1 This embodiment provides a limestone tailings treatment system, which implements the following steps:

[0035] Step 1: crushing the limestone tailings 1 using a crusher 2;

[0036] Step 2: Use a sand washing machine to wash the material crushed in step 1;

[0037] Step 3: using a screening machine 4 to perform primary screening on the material produced in step 2;

[0038] Step 4: Separate and precipitate the water 13 after the first sand washing in step 2 and circulate it into the sand washing machine in step 2;

[0039] Step 5: The material produced after step 3 is subjected to secondary sand washing;

[0040] Step 6: The muddy water 5 generated by the secondary sand washing in step 5 is connected to the muddy water 5 after the primary sand washing treatment and is subjected to sedimentation separation;

[0041] Step 7: Perform secondary screening on the material produced in step 5;

[0042] Step 8: backfilling 15 the product after precipitation and separation in step 4.

[0043] In this embodiment, specifically, in step one, a crusher 2 is selected from the conventional hydraulic jaw crusher 2, and the stones contained in the limestone tailings 1 of the construction waste are relatively large in volume, and enter into the crusher 2 to be crushed into smaller materials.

[0044] In this embodiment, specifically, in the step 2, the material crushed in the step 1 is subjected to a sand washing treatment by a spiral sand washing machine 3. After the sand washing treatment, muddy water 5 and stone mixed materials are generated. Water 13 needs to be introduced into the sand washing to dissolve the materials soluble in water 13 in the material. The other materials insoluble in water 13 are stones and muddy sand 6. Therefore, the products after the sand washing are stones and muddy water 5, among which the stones may be of different sizes and need to be processed again later.

[0045] In this embodiment, the stone mixture material and muddy water 5 produced in step two are further subjected to primary screening through step three, and muddy sand 6, large stone 7 and fine stone 8 are initially screened out. Part of the muddy water 5 produced by sand washing in step two enters the muddy sand 6, and this part of the muddy sand 6 enters the secondary sand washing in step five through the conveying device.

[0046] Furthermore, the large stones 7 screened in step three are crushed by a crusher 2 to produce corresponding sand and gravel 9, and the fine stones 8 are formed into sand and gravel 9 by a sand making machine 10, and the formed sand and gravel 9 enters step five for secondary sand washing, and the muddy sand 6 produced after the first screening also enters the secondary sand washing process.

[0047] A further implementation scheme of the present invention is that in the step four, the muddy water 5 produced in the step two is passed into the primary sedimentation tank 11, and then separated into water 13 and mud 14 by the mud-water separator 12. The water 13 is passed into the water storage tank 17 after secondary sedimentation in the secondary sedimentation tank 18. The water 13 in the water storage tank 17 is supplied to the spiral sand washing machine 3. Organic matter and microorganisms 23 are added to the mud 14 produced by the mud-water separator 12 and finally backfilled 15 for treatment to reduce harm to the environment. The water 13 is recycled and stored in the water storage tank 17 for reuse, which constitutes an internal circulation recycling of the water 13 in sequence.

[0048] In this embodiment, in the step five, a drum sand washing machine 16 is used for secondary sand washing. The drum sand washing machine 16 receives the muddy sand 6 transmitted from the conveying device and the sand and gravel 9 produced by the primary screening for secondary sand washing. The muddy water 5 produced by the drum sand washing machine 16 is passed into the primary sedimentation tank 11. The water storage tank 17 is connected to the drum sand washing machine 16 through a pipe 19. The pipe 19 is provided with a water pump 20. In the step seven, machine-made sand 21 and crushed stone sand 22 are produced through secondary screening. The machine-made sand 21 and crushed stone sand 22 can be directly recycled and have certain utilization value.

[0049] Example 2

[0050] like Figure 1 It is a limestone tailings treatment system that implements the following steps:

[0051] Step 1: crushing the limestone tailings 1 using a crusher 2;

[0052] Step 2: Use a sand washing machine to wash the material crushed in step 1;

[0053] Step 3: using a screening machine 4 to perform primary screening on the material produced in step 2;

[0054] Step 4: Separate and precipitate the water 13 after the first sand washing in step 2 and circulate it into the sand washing machine in step 2;

[0055] Step 5: The material produced after step 3 is subjected to secondary sand washing;

[0056] Step 6: The muddy water 5 generated by the secondary sand washing in step 5 is connected to the muddy water 5 after the primary sand washing treatment and is subjected to sedimentation separation;

[0057] Step 7: Perform secondary screening on the material produced in step 5;

[0058] Step 8: backfilling 15 the product after precipitation and separation in step 4.

[0059] In this embodiment, specifically, in step one, the crusher 2 is a conventional hydraulic jaw crusher 2, and the stones contained in the limestone tailings 1 are relatively large in volume and enter the crusher 2 to be crushed into smaller materials.

[0060] In this embodiment, specifically, in the step 2, the material crushed in the step 1 is subjected to a sand washing treatment by a spiral sand washing machine 3. After the sand washing treatment, muddy water 5 and stone mixed materials are generated. Water 13 needs to be introduced into the sand washing to dissolve the materials soluble in water 13 in the material. The other materials insoluble in water 13 are stones and muddy sand 6. Therefore, the products after the sand washing are stones and muddy water 5, among which the stones may be of different sizes and need to be processed again later.

[0061] In this embodiment, the stone mixture material and muddy water 5 produced in step two are further subjected to primary screening through step three, and muddy sand 6, large stone 7 and fine stone 8 are initially screened out. Part of the muddy water 5 produced by sand washing in step two enters the muddy sand 6, and this part of the muddy sand 6 enters the secondary sand washing in step five through the conveying device.

[0062] Furthermore, the large stones 7 screened in step three are crushed by a crusher 2 to produce corresponding sand and gravel 9, and the fine stones 8 are formed into sand and gravel 9 by a sand making machine 10, and the formed sand and gravel 9 enters step five for secondary sand washing, and the muddy sand 6 produced after the first screening also enters the secondary sand washing process.

[0063] A further implementation scheme of the present invention is that in the step four, the muddy water 5 produced in the step two is passed into the primary sedimentation tank 11, and then separated into water 13 and mud 14 by the mud-water separator 12. The water 13 is passed into the water storage tank 17 after secondary sedimentation in the secondary sedimentation tank 18. The water 13 in the water storage tank 17 is supplied to the spiral sand washing machine 3. Organic matter and microorganisms 23 are added to the mud 14 produced by the mud-water separator 12 and finally backfilled 15 for treatment to reduce harm to the environment. The water 13 is recycled and stored in the water storage tank 17 for reuse, which constitutes an internal circulation recycling of the water 13 in sequence.

[0064] In this embodiment, in the step five, a drum sand washing machine 16 is used for secondary sand washing. The drum sand washing machine 16 receives the muddy sand 6 transmitted from the conveying device and the sand and gravel 9 produced by the primary screening for secondary sand washing. The muddy water 5 produced by the drum sand washing machine 16 is passed into the primary sedimentation tank 11. The water storage tank 17 is connected to the drum sand washing machine 16 through a pipe 19. The pipe 19 is provided with a water pump 20. In the step seven, machine-made sand 21 and crushed stone sand 22 are produced through secondary screening. The machine-made sand 21 and crushed stone sand 22 can be directly recycled and have certain utilization value.

[0065] like Figure 2 In this embodiment, the spiral sand washing machine 3 includes a hopper 30, a support seat 31 is provided at the bottom of the hopper 30, the hopper 30 is arranged obliquely, and the two ends of the hopper 30 are respectively a feed end 32 and a discharge end 33. The height of the feed end 32 is lower than the height of the discharge end 33. The feed end 32 is used for feeding the material after the limestone tailings 1 is crushed.

[0066] Two groups of sand washing components are rotatably arranged in the hopper 30. The materials are washed by the rotation of the two groups of sand washing components and transported from the feed end 32 to the discharge end 33. A discharge hole 34 is provided at the bottom of the hopper 30 near the discharge end 33. The stone mixture is separated and sent out through the discharge end 33, and the muddy water 5 is discharged from the discharge hole 34.

[0067] Among them, the two groups of sand washing components are arranged oppositely, and the sand washing components include a motor 35 and a rotating shaft 36. The motor 35 is fixed outside the hopper 30, and the rotating shaft 36 is rotatably arranged in the hopper 30 and one end is drivingly connected to the motor 35. The rotating shaft 36 is provided with a paddle 360 ​​along a spiral direction, and a water outlet hole 361 is opened on the paddle 360. The water outlet hole 361 connects the inside of the paddle 360 ​​with the inside of the rotating shaft 36. A joint 362 connected to the inside of the rotating shaft 36 is provided on the outside of the other end of the hopper 30. The water 13 in the water tank 17 is passed into the rotating shaft 36 through the joint 362. A material channel 320 is provided on the top of the hopper 30 at one end of the feed end 32. The material channel 320 is arranged obliquely, and the stone mixture falls into the material channel 320 and slides into the hopper 30. The crushed material enters from the material channel 320, and automatically falls into the hopper 30 at the slope of the material channel 320. At the same time, water 13 enters the rotating shaft 36 through the joint 362, and the water 13 is sprayed out from the water outlet 361 on the paddle 360. The motor 35 drives the rotating shaft 36 and the paddle 360 ​​to rotate for sand washing. During the sand washing process, the material is transported to the discharge end 33, and the mud and water 5 are separated at the discharge hole 34. The material is sent from the discharge end 33 to the screening machine 4, and the processing is efficient and reliable.

[0068] It can be seen that the treatment system subjects the limestone tailings 1 to multiple treatment processes including crushing, screening, water 13 circulation treatment and sand washing. Part of the final product can be recycled and part can be used as backfill 15. The water 13 produced is recycled into the treatment system. All products have no impact on the environment and can be reused. The treatment is efficient, energy-saving and environmentally friendly.

[0069] Specifically, the limestone tailings 1 of the construction waste enters the crusher 2 and is crushed into smaller materials, and then enters the spiral sand washing machine 3 for a sand washing. The generated muddy water 5 enters the primary sedimentation tank 11 for sedimentation, and then passes through the mud-water separator 12 for separation of the muddy water 5. Organic matter and microorganisms 23 are added to the mud 14 and finally backfilled 15. The water 13 enters the secondary sedimentation tank 18 for sedimentation and is stored in the water storage tank 17. The water storage tank 17 circulates the water 13 into the spiral sand washing tank for reuse. The material processed by the spiral sand washing machine 3 enters the screening machine 4 for a screening and is once divided into mud, sand 6 and Large stone 7 and fine stone 8, the large stone 7 enters the crusher 2 and is crushed into sand and gravel 9 again, the fine stone 8 passes through the sand making machine 10 to make sand and gravel 9, the stone enters the drum sand washing machine 16, the muddy sand 6 enters the drum sand washing machine 16 through the conveying device, the drum sand washing machine 16 performs secondary sand washing and then performs secondary screening to be machine-made sand 21 and crushed stone sand 22 for recycling, the muddy water 5 generated enters the primary sedimentation tank 11 for sedimentation, the water 13 recovered in the water storage tank 17 is supplied to the drum sand washing machine 16 for secondary sand washing through the pipeline 19, the processing process is efficient, the product is harmless to the environment, and can be recycled for energy saving and environmental protection.

[0070] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A limestone tailings treatment system, characterized in that: Implement the following steps: Step 1: Use a crusher to crush the limestone tailings; Step 2: Use a sand washing machine to wash the material crushed in step 1; Step 3: Use a screening machine to perform primary screening on the material produced in step 2; Step 4: Separate and precipitate the water from the first sand washing in step 2 and circulate it into the sand washing machine in step 2; Step 5: The material produced after step 3 is subjected to secondary sand washing; Step 6: The muddy water produced by the secondary sand washing in step 5 is connected to the muddy water after the primary sand washing treatment and is subjected to sedimentation separation; Step 7: Perform secondary screening on the material produced in step 5; Step 8: Backfill the product after precipitation and separation in step 4.

2. A limestone tailings treatment system according to claim 1, characterized in that: In the step 2, the material crushed in the step 1 is subjected to a sand washing process by a spiral sand washing machine, and a mixture of muddy water and stone is produced after the sand washing process.

3. A limestone tailings treatment system according to claim 2, characterized in that: After step three, the stone mixture and muddy water produced in step two are primarily screened to separate muddy sand, large stones and fine stones. Part of the muddy water produced in the sand washing in step two enters the muddy sand, and this part of the muddy sand enters the secondary sand washing in step five through the conveying device.

4. A limestone tailings treatment system according to claim 3, characterized in that: The large stones screened in step three are crushed by a crusher to produce corresponding sand and gravel, and the fine stones are formed into sand and gravel by a sand making machine, and the formed sand and gravel enter step five for secondary sand washing.

5. A limestone tailings treatment system according to claim 4, characterized in that: In the step 4, the muddy water produced in the step 2 is passed into the primary sedimentation tank, and then separated into water and mud by the mud-water separator. The water is passed into the water storage tank after secondary sedimentation in the secondary sedimentation tank, and the water in the water storage tank is supplied to the spiral sand washing machine. Organic matter and microorganisms are added to the mud produced by the mud-water separator and finally backfilled.

6. A limestone tailings treatment system according to claim 5, characterized in that: In the step five, a drum sand washing machine is used for secondary sand washing. The drum sand washing machine receives muddy sand transmitted from the conveying device and sand and gravel produced by primary screening for secondary sand washing. The muddy water produced by the drum sand washing machine is passed into the primary sedimentation tank. The water storage tank is connected to the drum sand washing machine through a pipeline, and a water pump is provided on the pipeline.

7. A limestone tailings treatment system according to claim 6, characterized in that: In the step seven, machine-made sand and crushed stone sand are produced through secondary screening.

8. A limestone tailings treatment system according to claim 2, characterized in that: The spiral sand washing machine includes a hopper, a support seat is provided at the bottom of the hopper, the hopper is obliquely arranged, and the two ends of the hopper are respectively a feed end and a discharge end, the height of the feed end is lower than the height of the discharge end, and the feed end is used for feeding materials after the limestone tailings are crushed. Two groups of sand washing components are rotatably arranged in the hopper, and the materials are sand washed and transported from the feed end to the discharge end through the rotation of the two groups of sand washing components. A discharge hole is opened at the bottom of the hopper near the discharge end, and the stone mixture is separated and sent out through the discharge end, and the muddy water is discharged from the discharge hole.

9. A limestone tailings treatment system according to claim 8, characterized in that: The two groups of sand washing components are arranged oppositely, and the sand washing components include a motor and a rotating shaft. The motor is fixed outside the hopper, and the rotating shaft is rotatably arranged in the hopper and one end is connected to the motor drive. The rotating shaft is provided with a paddle along a spiral direction, and the paddle is provided with a water outlet hole. The water outlet hole connects the inside of the paddle with the inside of the rotating shaft. A joint connected to the inside of the rotating shaft is provided on the outside of the other end of the hopper, and the water in the water tank is passed into the rotating shaft through the joint.

10. A limestone tailings treatment system according to claim 9, characterized in that: A material channel is arranged on the top of the hopper at one end of the feed end, and the material channel is arranged obliquely, and the stone mixture material falls into the material channel and slides into the hopper.

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