Ardealite harmless treatment system and method

Abstract

The invention particularly relates to a phosphogypsum innocent treatment system and method, and belongs to the technical field of phosphogypsum innocent treatment.The phosphogypsum innocent treatment system comprises a mixing box, a smashing tank is installed at one end of the mixing box, a water storage tank is arranged at the other end of the mixing box, and a grinding assembly is arranged in the smashing tank; a mixing assembly is arranged below the grinding assembly and located in the mixing box, a driving assembly is arranged on the side edge of the mixing assembly and arranged at the lower end of the water storage tank, a feeding pump is fixedly installed on one side of the mixing box, a movable rod is driven by the cambered surface of a driving disc to move outwards, and the movable rod drives a grinding plate to move outwards. The phosphogypsum blocks are extruded onto the inner wall of the crushing tank by the rolling plate, the phosphogypsum blocks are crushed by the continuous outward movement of the rolling plate, then the primarily crushed phosphogypsum blocks are subjected to secondary grinding, and the phosphogypsum is ground into phosphogypsum powder, so that soluble impurities in the phosphogypsum blocks can be fully dissolved in water, and the treatment efficiency is accelerated.

Description

Technical Field

[0001] The present invention specifically relates to a system and method for harmless treatment of phosphogypsum, and belongs to the technical field of harmless treatment of phosphogypsum. Background Art

[0002] Phosphogypsum is a by-product produced in the phosphate fertilizer industry and wet phosphoric acid production process. Its main component is calcium sulfate dihydrate. Since it often contains impurities such as fluorine, phosphorus, heavy metals, etc., it poses potential hazards to the environment and human health. Therefore, it is particularly important to harmlessly treat phosphogypsum.

[0003] A harmless treatment system for phosphogypsum with an existing application number of CN202011584325.0 includes a stirring tank, a feed hopper for feeding the stirring tank, a process water storage tank for providing process water to the stirring tank, and a flotation tank connected to the stirring tank, wherein an agitator is arranged in the flotation tank, and a scraper is arranged above the flotation tank; a sewage pipe is connected to the left end of the flotation tank, an underflow valve is connected to the bottom of the flotation tank, the underflow valve is connected to a gate valve through a slurry pump, and the gate valve is connected to a filter; wherein a plurality of partitions are arranged in the flotation tank, the partitions divide the flotation tank into a plurality of flotation areas, a flow channel is arranged on the partition, adjacent flotation areas are connected through the flow channel, and a plurality of agitators are arranged in each flotation area; in addition, the present invention discloses a harmless treatment method for phosphogypsum. The present invention can remove components such as water-soluble phosphorus, water-soluble fluorine, and organic matter in phosphogypsum, and can effectively reduce the impurity content of phosphogypsum.

[0004] The above-mentioned device can effectively reduce the impurity content inside the phosphogypsum. However, it is necessary to carry out pre-grinding treatment on the phosphogypsum and then move it to the device, which requires secondary processing, reducing the processing efficiency of the material. At present, due to the low cost of the washing treatment method, it is generally widely used. The treatment process is to mix the phosphogypsum block with water in a certain proportion, usually between 1:2 and 1:4; then stir the mixture to ensure that all the phosphogypsum can fully contact the water; let it stand for a period of time to allow the soluble impurities to dissolve in the water; finally filter or settle to separate the solid and liquid, and collect the purified phosphogypsum; this process generally involves pouring larger phosphogypsum blocks into water and stirring and mixing, but the interior of the block phosphogypsum is difficult to contact water, and the soluble impurities inside the phosphogypsum block cannot be quickly dissolved in water, and the treatment efficiency is relatively slow.

[0005] Based on this, the present invention designs a system and method for harmless treatment of phosphogypsum to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a system and method for harmless treatment of phosphogypsum in view of the deficiencies in the prior art, so as to improve the mixing efficiency of phosphogypsum.

[0007] The present invention achieves the above-mentioned purpose through the following technical scheme: a harmless treatment system for phosphogypsum, comprising a mixing box, wherein a crushing tank is installed at one end of the mixing box, a water storage tank is arranged at the other end of the mixing box, a grinding assembly is arranged in the crushing tank, a mixing assembly is arranged below the grinding assembly and located in the mixing box, a driving assembly is arranged on the side of the mixing assembly, the driving assembly is arranged at the lower end of the water storage tank, and a feed pump is fixedly installed on one side of the mixing box.

[0008] Preferably, in order to improve the grinding effect of phosphogypsum, the grinding assembly includes a grinding bottom plate, a grinding top plate is movably arranged on the grinding bottom plate, a driving disk is rotatably connected to the grinding top plate, telescopic slide grooves are evenly arranged around the grinding top plate, a supporting spring is fixedly installed inside the telescopic slide groove, a movable rod is slidably clamped inside the telescopic slide groove, a rolling plate is fixedly connected to one end of the movable rod, an electric grinding rod is fixedly connected to the driving disk, the electric grinding rod is fixedly connected to the crushing tank, a driving grinding rod is fixedly connected to the lower surface of the grinding bottom plate, the lower end of the driving grinding rod is fixedly connected to the driving disk below, and the lower surface of the grinding top plate is fixedly connected to the motor driving rod.

[0009] Preferably, in order to improve the mixing effect of the raw materials, the mixing assembly includes a rotating disk, which is fixedly welded to the lower end of the motor drive rod, and a connecting rod is fixedly connected to the rotating disk. The end of the connecting rod away from the rotating disk is slidably connected to a stirring frame, and a stirring feed pipe is provided at the lower end of the stirring frame.

[0010] Preferably, in order to increase the feeding effect of the device, the driving assembly includes a driving rack fixed on the stirring frame, one side of the driving rack is meshed with a linkage gear, the lower end of the water storage tank is fixedly connected to a water outlet control block, the upper end of the driving rack is fixedly connected to an adjusting threaded rod, the upper end of the adjusting threaded rod passes through the water outlet control block and extends to the top of the water outlet control block and is fixedly connected to a water retaining adjusting disk, the adjusting threaded rod and the water outlet control block are threadedly connected to each other, water outlet holes are evenly arranged around the water outlet control block, and limiting rods are evenly arranged around the lower surface of the water retaining adjusting disk, and the limiting rods and the water outlet holes are slidably engaged with each other.

[0011] Preferably, in order to improve the grinding effect of the device, a collection funnel is fixedly provided inside the crushing tank, and differential rotation is maintained among the electric grinding rod, the driving grinding rod and the motor driving rod.

[0012] Preferably, in order to improve the linkage effect when the driving assembly is in use, the height of the stirring frame is lower than the lower end of the rotating disk, one end of the connecting rod is fixedly connected to the lower surface of the rotating disk, and a connecting groove is provided on the upper surface of the stirring frame. The other end of the connecting rod is slidably engaged with the connecting groove, and the stirring frame is slidably engaged with the inside of the mixing box.

[0013] Preferably, in order to increase the mixing processing effect of the device on the raw materials, a synchronous feed hole is opened inside the stirring frame, and feed through holes are opened around the stirring feed pipe. A feed hose is embedded in one end of the synchronous feed hole, and the other end of the feed hose is fixedly connected to the output end of the feed pump. A feed connecting hole is opened on one side of the mixing box, and the feed connecting hole and the feed hose are slidably engaged with each other.

[0014] A harmless treatment method for phosphogypsum, the treatment method is as follows:

[0015] S1: Put the phosphogypsum into the crushing tank, and the phosphogypsum falls into the center of the grinding assembly through the material guide funnel, and open the grinding assembly in the crushing tank to crush the phosphogypsum;

[0016] S2: The ground phosphogypsum powder enters a mixing box, and the mixing component scatters the phosphogypsum powder that falls into the mixing box;

[0017] S3: making the water in the water storage tank fall intermittently through the driving assembly;

[0018] S4: transporting the additive to the interior of the device through the feed pump and the stirring frame to uniformly mix with the raw materials for reaction;

[0019] S5: The mixing component and the driving component work together to mix the water and the phosphogypsum powder.

[0020] The beneficial effects of the present invention are:

[0021] 1. The movable rod is driven outward by the arc surface of the driving disk, and the movable rod drives the rolling plate to move outward. The phosphogypsum block is squeezed onto the inner wall of the crushing tank by the rolling plate. The phosphogypsum block is crushed under the continuous outward movement of the rolling plate. Then, the phosphogypsum block after primary crushing is ground for the second time. The phosphogypsum is ground into phosphogypsum powder, so that the soluble impurities inside the phosphogypsum block can be fully dissolved in water, thereby accelerating the processing efficiency;

[0022] 2. During the left and right movement of the stirring frame, the gear bar is pulled to push the driving rack to drive the adjusting threaded rod to rotate and move up and down repeatedly, so that the water outlet control block is sealed and opened repeatedly. The water outlet control block presents intermittent water flow, which helps to ensure uniform mixing of the ingredients and avoid material deposition or agglomeration;

[0023] 3. After grinding, the fine enough phosphogypsum falls into the mixing box. The motor drive rod rotates to drive the rotating disk to rotate. The rotating disk drives the stirring frame to reciprocate horizontally by rotating the connecting rod, so as to disperse the fallen phosphogypsum powder and increase the contact area with water. In the process of stirring, additional materials are injected into the interior of the device through the feed pump to improve the processing effect of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the mixing box part in the present invention;

[0028] Figure 5 It is the internal structure connection diagram of the water storage tank in the present invention;

[0029] Figure 6 It is a structural connection diagram of the grinding component part of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the grinding bottom plate part of the present invention;

[0031] Figure 8 It is a schematic diagram of the side cross-sectional structure of the grinding bottom plate part of the present invention;

[0032] Fig. 9 Schematic diagram of the process of the present invention.

[0033] In the figure: 1. mixing box; 2. crushing tank; 201. gathering funnel; 3. water storage tank; 301. water outlet control block; 302. adjusting threaded rod; 303. water retaining adjustment disk; 304. limit rod; 4. grinding assembly; 401. grinding bottom plate; 402. grinding top plate; 403. driving disk; 404. movable rod; 405. rolling plate; 406. electric grinding rod; 407. driving grinding rod; 408. motor driving rod; 5. mixing assembly; 501. rotating disk; 502. connecting rod; 503. stirring frame; 504. stirring feed pipe; 6. driving assembly; 601. driving rack; 602. linkage gear; 7. feed pump; 701. feed hose. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0035] See also Figure 1-8 As shown, a system and method for harmless treatment of phosphogypsum include a mixing box 1, a crushing tank 2 is installed at one end of the mixing box 1, a water storage tank 3 is arranged at the other end of the mixing box 1, a grinding component 4 is arranged in the crushing tank 2, a mixing component 5 is arranged below the grinding component 4 and located in the mixing box 1, a driving component 6 is arranged on the side of the mixing component 5, and the driving component 6 is arranged at the lower end of the water storage tank 3, and a feed pump 7 is fixedly installed on one side of the mixing box 1. The grinding component 4 grinds the phosphogypsum step by step and drops it into the mixing box 1, and then the mixing component 5 in the mixing box 1 reciprocates to drive the phosphogypsum to be evenly dispersed, and the mixing component 5 drives the driving component 6 to reciprocate at the same time, so that the water in the water storage tank 3 is intermittently sprinkled out and fully mixed with the phosphogypsum, and the external additives are evenly transported to the inside of the device through the feed pump 7, so as to improve the adding effect of external auxiliary materials.

[0036] The grinding assembly 4 includes a grinding bottom plate 401, on which a grinding top plate 402 is movable, and a driving disk 403 is rotatably connected to the grinding top plate 402. Telescopic slide grooves are evenly arranged around the grinding top plate 402, and a supporting spring is fixedly installed inside the telescopic slide groove. A movable rod 404 is slidably connected inside the telescopic slide groove, and a rolling plate 405 is fixedly connected to one end of the movable rod 404. An electric grinding rod 406 is fixedly connected to the driving disk 403, and the electric grinding rod 406 is fixedly connected to the crushing tank 2. A driving grinding rod 407 is fixedly connected to the lower surface of the grinding bottom plate 401, and the lower end of the driving grinding rod 407 is fixedly connected to the driving disk 403 below, and a motor driving rod 408 is fixedly connected to the lower surface of the grinding top plate 402, which respectively drives various parts in the device to rotate to improve the grinding effect of the material.

[0037] The mixing assembly 5 includes a rotating disk 501, which is fixedly welded to the lower end of the motor drive rod 408, and a connecting rod 502 is fixedly connected to the rotating disk 501. The end of the connecting rod 502 away from the rotating disk 501 is slidably connected to a stirring frame 503, and a stirring feed pipe 504 is provided at the lower end of the stirring frame 503. The driving assembly 6 includes a driving rack 601 fixed on the stirring frame 503, and a linkage gear 602 is meshed on one side of the driving rack 601. The lower end of the water storage tank 3 is fixedly connected to a water outlet. Control block 301, the upper end of the driving rack 601 is fixedly connected with an adjusting threaded rod 302, the upper end of the adjusting threaded rod 302 passes through the water outlet control block 301 and extends to the top of the water outlet control block 301 and is fixedly connected with a water retaining adjusting disk 303, the adjusting threaded rod 302 and the water outlet control block 301 are threadedly connected to each other, water outlet holes are evenly opened around the water outlet control block 301, and limiting rods 304 are evenly arranged around the lower surface of the water retaining adjusting disk 303, and the limiting rods 304 and the water outlet holes are slidably engaged with each other.

[0038] A material collecting funnel 201 is fixedly arranged inside the crushing tank 2, and the electric grinding rod 406, the driving grinding rod 407 and the motor driving rod 408 maintain differential rotation.

[0039] The height of the stirring frame 503 is lower than the lower end of the rotating disk 501, one end of the connecting rod 502 is fixedly connected to the lower surface of the rotating disk 501, a connecting slide groove is provided on the upper surface of the stirring frame 503, the other end of the connecting rod 502 is slidably engaged with the connecting slide groove, the stirring frame 503 is slidably engaged with the inside of the mixing box 1, a synchronous feeding hole is provided inside the stirring frame 503, feeding through holes are provided around the stirring feed pipe 504, a feeding hose 701 is inlaid and installed at one end of the synchronous feeding hole, the other end of the feeding hose 701 is fixedly connected to the output end of the feeding pump 7, a feeding connecting hole is provided on one side of the mixing box 1, and the feeding connecting hole and the feeding hose 701 are slidably engaged with each other.

[0040] A harmless treatment method for phosphogypsum is disclosed. The phosphogypsum is placed in a crushing tank 2, and the phosphogypsum falls on the center of a grinding component 4 through a material guide funnel. The grinding component 4 in the crushing tank 2 is opened to crush the phosphogypsum. The ground phosphogypsum powder enters a mixing box 1. The mixing component 5 breaks up the fallen phosphogypsum powder. The water in a water storage tank 3 is intermittently dropped through a driving component 6. The additive is transported to the interior of the device through a feed pump 7 and a stirring frame 503 to be uniformly mixed with the raw materials for reaction. The mixing component 5 and the driving component 6 work together to mix the water and the phosphogypsum powder.

[0041] When the device is used: firstly, put the phosphogypsum into the crushing tank 2, start the electric grinding rod 406, drive the grinding rod 407, and the motor drive rod 408;

[0042] Under the guidance of the aggregate hopper 201, the phosphogypsum is put into the center position of the grinding bottom plate 401 in the crushing tank 2. Since the grinding top plate 402 and the driving disk 403 are in differential motion, the arc surface of the driving disk 403 drives the movable rod 404 to move outward, and the movable rod 404 drives the rolling plate 405 to move outward. The phosphogypsum block is squeezed onto the inner wall of the crushing tank 2 by the rolling plate 405, and the phosphogypsum block is crushed under the continued outward movement of the rolling plate 405. Then, the phosphogypsum block after primary crushing is ground by the grinding bottom plate 401 and the grinding top plate 402 for re-grinding. When the ground phosphogypsum falls from the upper grinding bottom plate 401 to the lower grinding bottom plate 401, it is ground again, and the blocky phosphogypsum can be ground into phosphogypsum powder, so that the soluble impurities inside the phosphogypsum block can be fully dissolved in water, and the processing efficiency is fast.

[0043] After grinding, the sufficiently fine phosphogypsum falls into the mixing box 1, and the lower end of the motor driving rod 408 rotates to drive the rotating disk 501 to rotate. The rotating disk 501 drives the stirring frame 503 to reciprocate horizontally by rotating the connecting rod 502, so as to disperse the fallen phosphogypsum powder and increase the contact area with water.

[0044] At the same time, when the stirring frame 503 moves to the left, the stirring frame 503 drives the linkage gear 602 to rotate by driving the rack 601, and the linkage gear 602 rotates to drive the connecting rod 502 to rotate. After the connecting rod 502 rotates, since it is threadedly connected to the water outlet control block 301, the threaded rod 302 is adjusted to rotate and move upward, so that the water retaining plate is pushed upward and moved away from the position of the water outlet control block 301, and the water flow in the water storage tank 3 enters the mixing box 1 through the water outlet control block 301. The water outlet control block 301 is provided with a plurality of holes, which are convenient for breaking up the stranded water flow during operation, so that a larger contact area can be contacted with the phosphogypsum powder, and the stirring frame 503 and the stirring feed pipe 504 are stirred for mixing, and the external additives are transported to the interior of the device through the stirring frame 503 by the feed pump 7 to uniformly mix and react with the raw materials, thereby improving the adding effect of additives and other materials;

[0045] When the stirring frame 503 moves to the right, the stirring frame 503 drives the linkage gear 602 to rotate in the opposite direction by driving the rack 601. The linkage gear 602 rotates to drive the connecting rod 502 to rotate in the opposite direction. After the connecting rod 502 rotates, it is threadedly connected with the water outlet control block 301, which drives the adjusting threaded rod 302 to reverse and move downward, and the water outlet control block 301 is sealed. This is repeated, and the water outlet control block 301 presents intermittent water flow, which helps to ensure uniform mixing of the ingredients and avoid material deposition or agglomeration.

[0046] The movable rod 404 is driven to move outward by the arc surface of the driving disk 403, and the movable rod 404 drives the rolling plate 405 to move outward. The phosphogypsum block is squeezed onto the inner wall of the crushing tank 2 by the rolling plate 405, and the phosphogypsum block is crushed under the continuous outward movement of the rolling plate 405. Then, the phosphogypsum block after the primary crushing is secondary ground, and the phosphogypsum is ground into phosphogypsum powder, so that the soluble impurities inside the phosphogypsum block can be fully dissolved in water, thereby accelerating the processing efficiency;

[0047] During the left and right movement of the stirring frame 503, the gear bar is pulled to push the driving rack 601 to drive the adjusting threaded rod 302 to rotate and move up and down repeatedly, so that the water outlet control block 301 is sealed and opened repeatedly, and the water outlet control block 301 presents intermittent water flow, which helps to ensure uniform mixing of the ingredients and avoid material deposition or agglomeration;

[0048] After grinding, the sufficiently fine phosphogypsum falls into the mixing box 1. The motor driving rod 408 rotates to drive the rotating disk 501 to rotate. The rotating disk 501 drives the stirring frame 503 to reciprocate horizontally by rotating the connecting rod 502, so as to disperse the fallen phosphogypsum powder, thereby increasing the contact area with water. During the stirring process, additional materials are injected into the interior of the device through the feed pump 7 to improve the processing effect of the material.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A phosphogypsum harmless treatment system, comprising a mixing box (1), characterized in that: The mixing box (1) has a crushing tank (2) installed at one end of the mixing box (1), a water storage tank (3) is arranged at the other end of the mixing box (1), a grinding assembly (4) is arranged in the crushing tank (2), a mixing assembly (5) is arranged below the grinding assembly (4) and located in the mixing box (1), a driving assembly (6) is arranged on the side of the mixing assembly (5), and the driving assembly (6) is arranged at the lower end of the water storage tank (3), and a feed pump (7) is fixedly installed on one side of the mixing box (1).

2. A phosphogypsum harmless treatment system according to claim 1, characterized in that: The grinding assembly (4) comprises a grinding bottom plate (401), a grinding top plate (402) is movable on the grinding bottom plate (401), a driving disk (403) is rotatably connected to the grinding top plate (402), telescopic sliding grooves are evenly arranged around the grinding top plate (402), a supporting spring is fixedly installed inside the telescopic sliding groove, a movable rod (404) is slidably engaged inside the telescopic sliding groove, the other end of the supporting spring and the movable rod (404) are fixedly connected to each other, one end of the movable rod (404) is fixedly connected to a rolling plate (405), an electric grinding rod (406) is fixedly connected to the driving disk (403), and the electric grinding rod (406) is fixedly connected to the crushing tank (2); A driving grinding rod (407) is fixedly connected to the lower surface of the grinding bottom plate (401), the lower end of the driving grinding rod (407) is fixedly connected to the driving disk (403) below, and a motor driving rod (408) is fixedly connected to the lower surface of the grinding top plate (402).

3. A phosphogypsum harmless treatment system according to claim 2, characterized in that: The mixing assembly (5) comprises a rotating disk (501), wherein the rotating disk (501) is fixedly welded to the lower end of the motor drive rod (408), a connecting rod (502) is fixedly connected to the rotating disk (501), an end of the connecting rod (502) away from the rotating disk (501) is slidably connected to a stirring frame (503), and a stirring feed pipe (504) is provided at the lower end of the stirring frame (503).

4. A phosphogypsum harmless treatment system according to claim 3, characterized in that: The driving assembly (6) comprises a driving rack (601) fixed on the stirring frame (503), one side of the driving rack (601) is meshed with a linkage gear (602), the lower end of the water storage tank (3) is fixedly connected to a water outlet control block (301), the upper end of the driving rack (601) is fixedly connected to an adjusting threaded rod (302), the upper end of the adjusting threaded rod (302) passes through the water outlet control block (301) and extends to the top of the water outlet control block (301) and is fixedly connected to a water retaining adjusting disk (303), the adjusting threaded rod (302) and the water outlet control block (301) are threadedly connected to each other, water outlet holes are evenly provided around the water outlet control block (301), and limiting rods (304) are evenly provided around the lower surface of the water retaining adjusting disk (303), and the limiting rods (304) and the water outlet holes are slidably engaged with each other.

5. A phosphogypsum harmless treatment system according to claim 4, characterized in that: A material collecting funnel (201) is fixedly arranged inside the crushing pot (2), and the electric grinding rod (406), the driving grinding rod (407) and the motor driving rod (408) maintain differential rotation.

6. A phosphogypsum harmless treatment system according to claim 3, characterized in that: The height of the stirring frame (503) is lower than the lower end of the rotating disk (501), one end of the connecting rod (502) is fixedly connected to the lower surface of the rotating disk (501), and a connecting groove is provided on the upper surface of the stirring frame (503). The other end of the connecting rod (502) is slidably engaged with the connecting groove, and the stirring frame (503) is slidably engaged with the inside of the mixing box (1).

7. A phosphogypsum harmless treatment system according to claim 6, characterized in that: A synchronous feed hole is provided inside the stirring frame (503), and feed through holes are provided around the stirring feed pipe (504). A feed hose (701) is embedded and installed at one end of the synchronous feed hole, and the other end of the feed hose (701) is fixedly connected to the output end of the feed pump (7). A feed connection hole is provided on one side of the mixing box (1), and the feed connection hole and the feed hose (701) are slidably engaged with each other.

8. A method for harmless treatment of phosphogypsum, applicable to a harmless treatment system of phosphogypsum according to any one of claims 1 to 7, characterized in that: The processing method is as follows: S1: putting phosphogypsum into the crushing tank (2), allowing the phosphogypsum to fall into the center of the grinding assembly (4) through the material guide funnel, and opening the grinding assembly (4) in the crushing tank (2) to crush the phosphogypsum; S2: the ground phosphogypsum powder enters the mixing box (1), and the mixing component (5) breaks up the phosphogypsum powder that falls into the mixing box; S3: causing the water in the water storage tank (3) to fall intermittently through the driving assembly (6); S4: transporting the additive to the interior of the device through the feed pump (7) and the stirring frame (503) to uniformly mix and react with the raw materials; S5: The mixing component (5) and the driving component (6) work together to mix water and phosphogypsum powder.

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