Integrated flocculation and sedimentation treatment equipment and methods for mineral processing wastewater

Abstract

This invention provides an integrated flocculation and sedimentation treatment device and method for mineral processing wastewater, belonging to the field of wastewater treatment technology. The integrated flocculation and sedimentation treatment device for mineral processing wastewater includes a support frame, a flocculation box, a sedimentation tank, an inlet pipe, and a drain pipe. Multiple transverse baffles are fixedly installed inside the flocculation box, dividing the internal space into a serpentine water passage. Along the flow direction of the wastewater, the distance between any two adjacent transverse baffles gradually increases. Two width-limiting plates are fixedly installed on the top of each transverse baffle, and along the flow direction of the wastewater, the distance between corresponding width-limiting plates on each layer of transverse baffles gradually increases from top to bottom. The integrated flocculation and sedimentation treatment device for mineral processing wastewater provided by this invention has the advantages of sufficient flocculation reaction, good sedimentation effect of fine mineral mud, maintenance without shutdown, and strong anti-clogging ability.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to an integrated treatment equipment and method for flocculation and sedimentation of mineral processing wastewater. Background Technology

[0002] During the mining and beneficiation process of vanadium-titanium magnetite, a large amount of beneficiation wastewater is generated. This wastewater contains a large number of fine iron-titanium tailings particles, mineral colloids, and suspended impurities. The particles are tiny, have stable surface charges, and have extremely poor natural settling properties. If discharged directly, it will not only cause pollution to the water and soil environment around the mining area, but also easily lead to problems such as river siltation and ecological damage. Therefore, the beneficiation wastewater must be treated by flocculation and sedimentation before it can be discharged in compliance with regulations or recycled.

[0003] Currently, most existing flocculation treatment equipment for mineral processing wastewater adopts a simple box structure with a single internal water passage design. The water flow velocity lacks a reasonable gradient along the flow path, failing to balance the strong turbulent mixing conditions required for coagulation reactions with the smooth hydraulic environment needed for flocculation formation. A constant flow velocity easily leads to insufficient mixing of front-end reagents and excessive flow velocity at the rear, breaking up nascent flocs, severely impacting the flocculation treatment effect. Furthermore, traditional equipment often uses centralized mixing for reagent addition, with coagulants, functional additives, and coagulant aids added simultaneously. This results in various reagents mixing and antagonistic effects, failing to follow the step-by-step, orderly reaction mechanism of wastewater treatment. Given the characteristic of vanadium-titanium magnetite beneficiation wastewater being rich in magnetic fine tailings particles, conventional treatment equipment lacks a zoned, precise dosing structure. It cannot sequentially add coagulants, magnetic media, and coagulant aids in different reaction zones, making it difficult to utilize magnetic media to adsorb and encapsulate fine iron-titanium particles to increase floc density, and hindering the effective aggregation and sedimentation of fine suspended sludge.

[0004] Therefore, it is necessary to provide an integrated flocculation and sedimentation treatment equipment and method for mineral processing wastewater to solve the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem solved by this invention is to provide an integrated treatment equipment and method for flocculation and sedimentation of mineral processing wastewater, which has sufficient flocculation reaction, good sedimentation effect of fine mineral mud, can be maintained without stopping the machine, and has strong anti-clogging ability.

[0006] To solve the above-mentioned technical problems, the present invention provides an integrated flocculation and sedimentation treatment device for mineral processing wastewater, comprising a support frame, a flocculation box, a sedimentation tank, an inlet pipe, and a drain pipe. Both the flocculation box and the sedimentation tank are fixedly installed on the support frame and are fixedly connected. The inlet pipe is fixedly installed on the top of the flocculation box, and the drain pipe is fixedly installed on the outer wall of the sedimentation tank on the side away from the flocculation box. Multiple transverse baffles are fixedly installed inside the flocculation box, dividing the internal space of the flocculation box into a serpentine water passage. Along the flow direction of the wastewater, the distance between any two adjacent transverse baffles gradually increases. Two width-limiting plates are fixedly installed on the top of each transverse baffle, and fixed blocking plates are fixedly installed on the outer wall of the side of the two width-limiting plates that are far apart from each other. Along the flow direction of the wastewater, the distance between the corresponding two width-limiting plates on each layer of transverse baffles is... The spacing between the tubes gradually increases from top to bottom. A first distribution pipe, a second distribution pipe, and a third distribution pipe are fixedly installed on the top of the flocculation box. A coagulant injection pipe is fixedly installed on the top of the first distribution pipe, a magnetic medium injection pipe is fixedly installed on the top of the second distribution pipe, and a coagulant aid injection pipe is fixedly installed on the top of the third distribution pipe. Multiple first thin tubes arranged at equal intervals are fixedly installed at the bottom of the first distribution pipe, multiple second thin tubes arranged at equal intervals are fixedly installed at the bottom of the second distribution pipe, and multiple third thin tubes arranged at equal intervals are fixedly installed at the bottom of the third distribution pipe. The bottom ends of the first, second, and third thin tubes all extend into the flocculation box and along the wastewater flow direction. There is at least one horizontal partition between the bottom ends of the second and first thin tubes and between the bottom ends of the third and second thin tubes.

[0007] Furthermore, a collection hopper is welded to the bottom of the sedimentation tank, and a rotating scraper is installed inside the collection hopper. A support plate is fixedly installed on the top of the sedimentation tank, and a rotating rod is installed through and rotatably on the support plate. The bottom end of the rotating rod extends into the collection hopper and is fixedly connected to the rotating scraper. A first motor is fixedly installed on the top of the support plate, and the output shaft of the first motor is fixedly connected to the top end of the rotating rod. A sludge discharge pipe is fixedly installed at the bottom of the collection hopper.

[0008] Furthermore, a grid-shaped fixing frame is fixedly installed inside the sedimentation tank. The grid-shaped fixing frame has four water inlets. The rotating rod passes through the grid-shaped fixing frame and is rotatably connected to the grid-shaped fixing frame. Four porous filter plates are installed in the four water inlets respectively.

[0009] Furthermore, four rotatable blocking plates are rotatably installed at the bottom of the grid-shaped fixing frame, and four sets of traction mechanisms are provided on the support plate to drive the four rotatable blocking plates to rotate respectively, thereby achieving the sealing and opening of the corresponding water inlets.

[0010] Preferably, each of the traction mechanisms includes a base, a winding reel, a pull wire, and a second motor. The base is fixedly installed on the top of the support plate, the winding reel is rotatably installed on the base, the pull wire is wound inside the winding reel, the free end of the pull wire extends into the sedimentation tank and is fixedly connected to the corresponding rotatable stop plate, the second motor is fixedly installed on the base, and the output shaft of the second motor is fixedly connected to the winding reel.

[0011] Furthermore, a guide pulley is installed on the base, and the pull wire is wound around the groove of the guide pulley.

[0012] Furthermore, a porous circular cover is installed on the inner wall of the sedimentation tank near the drain pipe, and the central axis of the porous circular cover coincides with the drain pipe.

[0013] Preferably, the porous dome is rotatably installed inside the sedimentation tank. A first pulley is fixedly sleeved on the outer wall of the porous dome. A third motor is fixedly installed on the top of the support plate. A second pulley is fixedly sleeved on the output shaft of the third motor. The first pulley and the second pulley are fitted with the same belt. A cleaning brush is fixedly installed on the bottom of the support plate. The cleaning brush is in contact with the outer peripheral wall of the porous dome.

[0014] Preferably, the support plate has an avoidance opening, the belt passes through the avoidance opening and is movably connected to the inner wall of the avoidance opening.

[0015] To address the above problems, the present invention also provides a method for using an integrated flocculation and sedimentation treatment device for mineral processing wastewater, comprising the following steps:

[0016] T1: Vanadium-titanium magnetite beneficiation wastewater is uniformly introduced into the flocculation box through the inlet pipe. At the same time, coagulant solution, magnetic medium suspension slurry and coagulant aid solution are prepared. The three agents are connected to the coagulant injection pipe, magnetic medium injection pipe and coagulant aid injection pipe respectively. The addition flow rate of each agent is controlled by the quantitative dosing equipment to ensure the accuracy of agent addition.

[0017] T2: Wastewater flows along the direction of water flow in the serpentine water passage of the flocculation box. Coagulant solution is quantitatively added to the front section of the flow channel through the first thin tube at the bottom of the first distribution pipe. The high-velocity turbulent environment formed by the narrow spacing at the front section of the flow channel allows the coagulant to mix quickly and thoroughly with the wastewater, destroying the double electric layer stability of the fine mineral mud colloidal particles in the wastewater and completing the particle destabilization.

[0018] T3: The destabilized wastewater continues to flow through the front section of the serpentine water passage. Magnetic medium suspension slurry is quantitatively added through the second fine tube at the bottom of the second distribution pipe. The magnetic medium solid particles adsorb and combine with the destabilized titanium iron micro-fine mineral mud particles, forming magnetic flocs through the magnetic coagulation effect. At the same time, the medium flow velocity environment formed by the gradually expanding channel spacing in the middle section promotes the initial aggregation of the flocs.

[0019] T4: The magnetic flocs flow into the middle and rear section of the serpentine water passage with the wastewater. The coagulant solution is quantitatively added through the third fine tube at the bottom of the third distribution pipe. In the low-velocity and stable environment formed by the wide spacing in the rear section of the flow channel, the coagulant fully exerts its bridging effect, which causes the magnetic flocs to further aggregate and grow, forming dense composite flocs with high density and easy settling.

[0020] T5: Wastewater containing composite flocs flows smoothly into the sedimentation tank, where gravity causes solid-liquid stratification. The composite flocs quickly settle to the bottom of the sedimentation tank, while the supernatant flows upward and is discharged through the drain pipe.

[0021] Compared with related technologies, the integrated flocculation and sedimentation treatment equipment and method for mine wastewater provided by this invention have the following advantages:

[0022] This invention provides an integrated flocculation and sedimentation treatment device for mineral processing wastewater. By setting multiple sets of transverse baffles and width limiting plates inside the flocculation tank, a serpentine flow channel with gradually changing flow path is formed, so that the water flow velocity decreases step by step from the inlet to the outlet. This reasonably matches different hydraulic conditions for rapid coagulation and stable floc growth. At the same time, with the help of three sets of independently arranged distribution pipes and injection pipes, the coagulant, magnetic medium and coagulant aid are added in stages and in a staggered manner. In view of the characteristics of vanadium-titanium magnetite beneficiation wastewater with high content of fine iron and titanium tailings and difficult particle settling, the magnetic medium is used to enhance the specific gravity of flocs and complete the destabilization, adsorption and flocculation in steps. This not only avoids the high flow velocity scouring and breaking of flocs, but also fundamentally improves the settling performance of fine mud, and significantly improves the targeting and efficiency of the flocculation reaction.

[0023] By setting up a grid-shaped fixing frame to provide a stable installation foundation for the porous filter plate, the porous filter plate can effectively intercept fine flocs that have not settled completely, further improving the cleanliness of the effluent. At the same time, the bottom of the grid-shaped fixing frame is equipped with independently rotatable blocking plates and corresponding traction mechanisms. The opening and closing of each rotatable blocking plate can be controlled individually through the traction mechanism, realizing the individual blocking and opening of the corresponding water inlet. The blocked porous filter plate can be disassembled, cleaned or replaced without shutting down the entire set of equipment, ensuring continuous and stable operation of the equipment and adapting to the needs of large-scale mining treatment.

[0024] By installing a porous circular cover at the outlet of the sedimentation tank, the supernatant to be discharged is subjected to secondary deep filtration, further trapping escaped micro-flocs and preventing excessive suspended solids in the effluent. At the same time, a third motor drives the belt drive to rotate the porous circular cover at low speed. Combined with a fixed cleaning brush, impurities and flocs attached to the surface of the circular cover are scraped off in real time, realizing automatic anti-clogging and cleaning of the filter structure. This avoids filter pore blockage caused by long-term use and continuously ensures stable effluent quality and water flow efficiency.

[0025] This invention provides a method for using an integrated flocculation and sedimentation treatment equipment for mineral processing wastewater. Utilizing the hydraulic gradient advantage of the equipment's gradually changing serpentine flow channel, combined with a three-stage precise zone dosing process, it systematically completes the entire process of wastewater colloid destabilization, magnetic particle adsorption and recombination, and the formation of large-diameter dense flocs. The process logic is coherent, and the reaction conditions are rationally matched. It can efficiently remove fine suspended impurities and heavy metal tailings particles from mineral processing wastewater. The treatment process is continuous and compact, and the effluent quality is stable, facilitating long-term, large-scale, continuous operation in mines. Attached Figure Description

[0026] Figure 1 A schematic diagram of the integrated flocculation and sedimentation treatment equipment for mineral processing wastewater provided by the present invention;

[0027] Figure 2 for Figure 1 Another structural schematic diagram of the integrated flocculation and sedimentation treatment equipment for mineral processing wastewater is shown.

[0028] Figure 3 for Figure 1 A top view of the integrated flocculation and sedimentation treatment equipment for mineral processing wastewater;

[0029] Figure 4 for Figure 3 The sectional view shown in the FF direction;

[0030] Figure 5 for Figure 1 The diagram shows a cross-sectional view of the flocculation box from the left side.

[0031] Figure 6 for Figure 1 The diagram shown is a structural schematic of the sedimentation tank.

[0032] Figure 7 for Figure 6 The diagram shows a cross-sectional view of the sedimentation tank from the right side.

[0033] Figure 8 for Figure 7 The diagram shows the connection structure between the traction mechanism and the rotatable stop plate.

[0034] Figure 9 for Figure 8A schematic diagram of the connection structure between the traction mechanism and the rotatable stop plate from another perspective;

[0035] Figure 10 for Figure 8 The enlarged schematic diagram of part A shown below;

[0036] Figure 11 for Figure 6 The diagram shows the connection between the grid-shaped fixing frame and the porous filter plate.

[0037] Figure 12 for Figure 11 The diagram shows the structure of the porous filter plate.

[0038] Numbering on the map:

[0039] 1. Support frame; 2. Flocculation box; 3. Sedimentation tank; 4. Inlet pipe; 5. Horizontal baffle; 6. Coagulant injection pipe; 7. Magnetic medium injection pipe; 8. Coagulant aid injection pipe; 9. First distribution pipe; 10. Second distribution pipe; 11. Third distribution pipe; 12. Width limiting plate; 13. Fixed blocking plate; 14. Collection hopper; 15. Sludge discharge pipe; 16. Support plate; 17. First motor; 18. Rotating rod; 19. Rotating scraper; 20. Drain pipe; 21. Grid-shaped fixed frame; 22. Porous filter plate; 23. Rotatable blocking plate; 24. Base; 25. Winding reel; 26. Pull wire; 27. Second motor; 28. Porous circular cover; 29. ​​First pulley; 30. Third motor; 31. Second pulley; 32. Belt; 33. Cleaning brush. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] First embodiment:

[0042] Please refer to the following: Figures 1-12In the first embodiment of the present invention, an integrated flocculation and sedimentation treatment device for mineral processing wastewater is proposed, particularly suitable for the treatment of vanadium-titanium magnetite mineral processing wastewater. It includes: a support frame 1, a flocculation box 2, a sedimentation tank 3, an inlet pipe 4, and a drain pipe 20. The flocculation box 2 and the sedimentation tank 3 are both fixedly installed on the support frame 1, and the flocculation box 2 and the sedimentation tank 3 are fixedly connected to form an integrated structure, shortening the water flow path, reducing short-circuiting, and improving overall treatment efficiency. The inlet pipe 4 is fixedly installed on the top of the flocculation box 2, and the drain pipe 20 is fixedly installed on the outer wall of the sedimentation tank 3 on the side away from the flocculation box 2. Multiple transverse baffles 5 are fixedly installed inside the flocculation box 2, dividing the internal space of the flocculation box 2 into a serpentine water passage, extending the wastewater retention time, and ensuring thorough mixing and reaction of the reagents and wastewater. Along the flow direction of the wastewater, the spacing between any two adjacent transverse baffles 5 gradually increases. Two transverse baffles are fixedly installed on the top of each transverse baffle 5. Width-limiting plates 12 are fixedly installed on the outer walls of the two width-limiting plates 12 on the sides away from each other. Along the flow direction of wastewater, the distance between the corresponding two width-limiting plates 12 on each layer of transverse diaphragms 5 gradually increases from top to bottom. The width-limiting plates 12 and transverse diaphragms 5 work together to gradually expand the flow cross-section, so that the water flow velocity decreases smoothly from fast to slow along the process. The high flow velocity at the front end forms strong turbulence to meet the coagulation and mixing requirements, while the low flow velocity in the middle and rear sections creates a stable hydraulic environment to avoid floc breakage. To provide conditions for the growth of fine mineral mud flocs, the top of the flocculation box 2 is fixedly equipped with a first distribution pipe 9, a second distribution pipe 10 and a third distribution pipe 11. The top of the first distribution pipe 9 is fixedly equipped with a coagulant injection pipe 6, the top of the second distribution pipe 10 is fixedly equipped with a magnetic medium injection pipe 7, and the top of the third distribution pipe 11 is fixedly equipped with a coagulant aid injection pipe 8. The ends of the coagulant injection pipe 6, the magnetic medium injection pipe 7 and the coagulant aid injection pipe 8 are respectively connected to independent dosing and delivery units.Among them, the coagulant injection pipe 6 is externally connected to the coagulant dissolving tank and the metering pump; the magnetic medium injection pipe 7 is externally connected to the magnetic medium slurry mixing tank and the slurry delivery pump; and the coagulant aid injection pipe 8 is externally connected to the coagulant aid dissolving tank and the metering pump. These three injection structures are independently arranged, allowing for the separate metering of coagulant, magnetic medium suspension fluid, and coagulant aid, achieving precise zoning of the agents. The bottom of the first distribution pipe 9 has multiple equally spaced first thin tubes fixedly installed; the bottom of the second distribution pipe 10 has multiple equally spaced second thin tubes fixedly installed; and the bottom of the third distribution pipe 11 has multiple equally spaced third thin tubes fixedly installed. The bottom ends of the first, second, and third thin tubes all extend into the flocculation tank 2, along the wastewater flow direction. At least one transverse partition 5 separates the bottom ends of the second and first thin tubes, and the bottom ends of the third and second thin tubes. In this embodiment, only one transverse partition 5 is used. The partitions 5 are used to stagger the dosing points of each agent, ensuring that the coagulant is first fully mixed and destabilized with the wastewater, then magnetic media particles are added to adsorb and bind the fine suspended particles, and finally, a coagulant aid is added to bridge and form the flocculation. This effectively avoids antagonistic effects from direct mixing of different agents, significantly improving the flocculation effect of vanadium-titanium magnetite fine tailings.

[0043] In this embodiment, a collection hopper 14 is welded to the bottom of the sedimentation tank 3, and a rotating scraper 19 is provided inside the collection hopper 14. A support plate 16 is fixedly installed on the top of the sedimentation tank 3. A rotating rod 18 is installed through and rotatably on the support plate 16. The bottom end of the rotating rod 18 extends into the collection hopper 14 and is fixedly connected to the rotating scraper 19. A first motor 17 is fixedly installed on the top of the support plate 16. The output shaft of the first motor 17 is fixedly connected to the top end of the rotating rod 18. A sludge discharge pipe 15 is fixedly installed at the bottom of the collection hopper 14.

[0044] In this embodiment, a grid-shaped fixing frame 21 is fixedly installed inside the sedimentation tank 3. The grid-shaped fixing frame 21 has four water inlets. The rotating rod 18 passes through the grid-shaped fixing frame 21 and is rotatably connected to the grid-shaped fixing frame 21. Four porous filter plates 22 are installed in the four water inlets respectively for filtering wastewater and intercepting some of the fine flocs and suspended impurities that have not yet settled completely. The permeable holes on the porous filter plates 22 are evenly distributed and adopt a composite design of most small holes and a few large holes, which not only ensures the basic filtration and interception effect, but also effectively prevents the filter holes from being blocked by mineral mud impurities, thus taking into account both water permeability and interception performance.

[0045] In this embodiment, to facilitate the removal and cleaning of the porous filter plate 22 without interrupting equipment operation, four rotatable blocking plates 23 are rotatably mounted on the bottom of the grid-shaped fixing frame 21. Four sets of traction mechanisms are provided on the support plate 16 to drive the four rotatable blocking plates 23 to rotate, thereby sealing and opening the corresponding water inlets. Water inlets can be sealed individually or in multiple sets as needed. Before removing the porous filter plate 22, the corresponding water inlets are sealed in advance, and the porous filter plates 22 in the remaining water inlets temporarily perform all filtration work, enabling flexible maintenance. The traction mechanisms specifically include… The system includes a base 24, a winding reel 25, a pull wire 26, and a second motor 27. The base 24 is fixedly mounted on the top of the support plate 16. The winding reel 25 is rotatably mounted on the base 24. The pull wire 26 is wound inside the winding reel 25, and the free end of the pull wire 26 extends into the sedimentation tank 3 and is fixedly connected to the corresponding rotatable stop plate 23. The second motor 27 is fixedly mounted on the base 24, and the output shaft of the second motor 27 is fixedly connected to the winding reel 25. The second motor 27 drives the winding reel 25 to rotate forward and backward, realizing the winding and unwinding action of the pull wire 26, thereby pulling the rotatable stop plate 23 to complete the rotational opening and closing.

[0046] In this embodiment, a guide pulley is installed on the base 24, and the pull wire 26 is wound around the groove of the guide pulley. The guide pulley guides the pull wire 26 and changes its angle, reducing the bending wear and running friction resistance of the pull wire 26, ensuring stable transmission of tension, and improving the service life and operation accuracy of the traction mechanism.

[0047] In this embodiment, a porous circular cover 28 is installed on the inner wall of the sedimentation tank 3 near the drain pipe 20. This cover is used to perform secondary deep filtration on the water that is about to be discharged through the drain pipe 20, further intercepting escaped micro-flocs and preventing the suspended solids in the effluent from exceeding the standard. The central axis of the porous circular cover 28 coincides with the drain pipe 20.

[0048] In this embodiment, a porous circular cover 28 is rotatably installed inside the sedimentation tank 3. A first pulley 29 is fixedly sleeved on the outer wall of the porous circular cover 28. A third motor 30 is fixedly installed on the top of the support plate 16. A second pulley 31 is fixedly sleeved on the output shaft of the third motor 30. The same belt 32 is sleeved on the first pulley 29 and the second pulley 31. An avoidance opening is provided on the support plate 16. The belt 32 passes through the avoidance opening and is movably connected to the inner wall of the avoidance opening. A cleaning brush 33 is fixedly installed at the bottom of the support plate 16. The cleaning brush 33 contacts the outer peripheral wall of the porous circular cover 28. The third motor 30 is started at regular intervals, and the porous circular cover 28 is driven to rotate continuously at low speed through the belt 32. The fixed cleaning brush 33 scrapes away the impurities and flocs attached to the surface of the circular cover in real time, realizing automatic cleaning of the filter structure, avoiding filter pore blockage caused by long-term use, and continuously ensuring the quality of the effluent.

[0049] In this embodiment:

[0050] The mineral processing wastewater first flows into the flocculation box 2 at a constant speed through the inlet pipe 4. Then, corresponding agents are added to the three sets of distribution pipes in sequence through the coagulant injection pipe 6, the magnetic medium injection pipe 7, and the coagulant aid injection pipe 8. The agents are evenly dispersed and added to different reaction sections of the serpentine water passage through multiple sets of fine pipes. The wastewater flows meanderingly in the gradually changing serpentine flow channel formed by the diaphragm 5 and the width limiting plate 12. The flow velocity gradually decreases from the inlet end to the outlet end. The high-speed turbulence in the front section promotes the rapid diffusion of coagulant, destroys the stability of colloidal particles and completes the destabilization reaction. In the middle and front sections of the flow channel, fluid magnetic medium is introduced. Magnetic solid particles adsorb and wrap the fine titanium iron tailings particles, increasing the specific gravity of the flocs. In the low-speed and gentle water flow environment in the middle and rear sections, the coagulant aid fully exerts its bridging effect, causing the fine particles, magnetic medium, and tailings mud to aggregate and form dense and easily settled large-particle-size composite flocs.

[0051] After the flocculation reaction is fully completed, the mixed wastewater flows smoothly into the sedimentation tank 3. The solid-liquid separation is achieved by gravity. The high-density composite flocs quickly sink and accumulate in the bottom collection hopper 14. When the sludge is discharged regularly, the first motor 17 is started and the rotating scraper 19 is driven to run at low speed by the rotating rod 18. This can effectively break up the sludge and discharge it through the sludge discharge pipe 15.

[0052] The supernatant after sedimentation flows upward through the grid-shaped fixed frame 21, passes through various water inlets and is intercepted and filtered by the porous filter plate 22, effectively trapping residual fine flocs and incompletely settled suspended impurities in the water, further improving the water cleanliness. Under normal operating conditions, all sets of rotatable blocking plates 23 remain open, and all water inlets are simultaneously open, ensuring stable water flow in the sedimentation tank 3. When one or more porous filter plates 22 become clogged and need to be disassembled for cleaning and maintenance, there is no need to shut down the entire set of equipment. Only the traction mechanism at the corresponding position is activated, and the second motor 27 drives the winding disc 25 to rotate and wind the pull wire 26, pulling the rotatable blocking plate 23 to rotate and close, sealing the corresponding water inlet individually. The remaining unsealed water inlets and porous filter plates 22 continue to flow water normally for filtration, maintaining continuous and stable operation of the equipment. Operators can disassemble, clean, and replace the porous filter plate 22 in the blocked area without shutting down the machine. After the maintenance is completed, the traction mechanism is reversed and reset, and the blockage plate 23 can be reopened, and the water outlet returns to normal water flow.

[0053] After undergoing multiple layers of sedimentation and primary filtration, the water continues to flow to the outlet of sedimentation tank 3, where it undergoes secondary filtration via a porous circular cover 28. The third motor 30 is periodically started, driving the porous circular cover 28 to rotate at low speed via the first pulley 29, the second pulley 31, and the belt 32. This, combined with a fixed cleaning brush 33, continuously scrapes away impurities and flocs adhering to the surface of the cover, achieving automatic anti-clogging and cleaning of the filtration structure. Finally, the purified supernatant is stably discharged from the drain pipe 20, thus fully realizing an integrated treatment process for mineral processing wastewater, including continuous flocculation, sedimentation, multi-stage filtration, and non-stop maintenance.

[0054] Second embodiment:

[0055] In a second embodiment of the present invention, a method for using an integrated flocculation and sedimentation treatment device for mineral processing wastewater is provided, comprising the following steps:

[0056] T1: Vanadium-titanium magnetite beneficiation wastewater is uniformly introduced into flocculation box 2 through inlet pipe 4. At the same time, coagulant solution, magnetic medium suspension slurry and coagulant aid solution are prepared respectively. The three agents are connected to coagulant injection pipe 6, magnetic medium injection pipe 7 and coagulant aid injection pipe 8 respectively. The addition flow rate of each agent is controlled by quantitative dosing equipment to ensure the accuracy of agent dosing.

[0057] T2: Wastewater flows along the direction of water flow in the serpentine water passage of flocculation box 2. Coagulant solution is quantitatively added to the front section of the flow channel through the first thin tube at the bottom of the first distribution pipe 9. The high-velocity turbulent environment formed by the narrow spacing at the front section of the flow channel allows the coagulant to mix quickly and thoroughly with the wastewater, destroying the double electric layer stability of the fine mineral mud colloidal particles in the wastewater and completing the particle destabilization.

[0058] T3: The destabilized wastewater continues to flow through the front section of the serpentine water passage. Magnetic medium suspension slurry is quantitatively added through the second fine tube at the bottom of the second distribution pipe 10. The magnetic medium solid particles adsorb and combine with the destabilized titanium iron micro-fine mineral mud particles, forming magnetic flocs through the magnetic coagulation effect. At the same time, the medium flow velocity environment formed by the gradually expanding channel spacing in the middle section promotes the initial aggregation of the flocs.

[0059] T4: The magnetic flocs flow into the middle and rear section of the serpentine water passage with the wastewater. The coagulant solution is quantitatively added through the third fine tube at the bottom of the third distribution pipe 11. In the low-velocity and stable environment formed by the wide spacing in the rear section of the flow channel, the coagulant fully exerts its bridging effect, which causes the magnetic flocs to further aggregate and grow, forming dense composite flocs with high density and easy settling.

[0060] T5: Wastewater containing composite flocs flows smoothly into sedimentation tank 3, where gravity causes solid-liquid stratification. The composite flocs quickly settle to the bottom of sedimentation tank 3, while the supernatant flows upward and is discharged through drain pipe 20.

[0061] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A mining wastewater flocculation and sedimentation integrated treatment device, comprising a support frame (1), a flocculation box (2), a sedimentation tank (3), an inlet pipe (4), and a drain pipe (20), wherein the flocculation box (2) and the sedimentation tank (3) are both fixedly installed on the support frame (1), and the flocculation box (2) is fixedly connected to the sedimentation tank (3), the inlet pipe (4) is fixedly installed on the top of the flocculation box (2), and the drain pipe (20) is fixedly installed on the outer wall of the sedimentation tank (3) away from the flocculation box (2), characterized in that, The flocculation box (2) is fixedly equipped with multiple horizontal partitions (5), which divide the internal space of the flocculation box (2) into a serpentine water passage. Along the flow direction of the wastewater, the distance between any two adjacent horizontal partitions (5) gradually increases. Two width limiting plates (12) are fixedly installed on the top of each horizontal partition (5). Fixed blocking plates (13) are fixedly installed on the outer wall of the two width limiting plates (12) that are far apart from each other. Along the flow direction of the wastewater, the distance between the two corresponding width limiting plates (12) on each layer of horizontal partitions (5) gradually increases from top to bottom. The top of the flocculation box (2) is fixedly equipped with a first distribution pipe (9), a second distribution pipe (10) and a third distribution pipe (11). The top of the first distribution pipe (9) is... A coagulant injection pipe (6) is fixedly installed on the top of the second distribution pipe (10), a magnetic medium injection pipe (7) is fixedly installed on the top of the third distribution pipe (11), a coagulant aid injection pipe (8) is fixedly installed on the bottom of the first distribution pipe (9), a plurality of first thin pipes arranged at equal intervals are fixedly installed on the bottom of the second distribution pipe (10), a plurality of second thin pipes arranged at equal intervals are fixedly installed on the bottom of the third distribution pipe (11), and a plurality of third thin pipes arranged at equal intervals are fixedly installed on the bottom of the first thin pipe, the second thin pipe and the third thin pipe all extend into the flocculation box (2), and along the wastewater flow direction, there is at least one horizontal partition (5) between the bottom ends of the second thin pipe and the first thin pipe, and between the bottom ends of the third thin pipe and the second thin pipe. The sedimentation tank (3) is welded to the bottom of a collection hopper (14), and a rotating scraper (19) is installed inside the collection hopper (14). A support plate (16) is fixedly installed on the top of the sedimentation tank (3). A rotating rod (18) is installed through and rotatably on the support plate (16). The bottom end of the rotating rod (18) extends into the collection hopper (14) and is fixedly connected to the rotating scraper (19). A first motor (17) is fixedly installed on the top of the support plate (16). The output shaft of the first motor (17) is fixedly connected to the top end of the rotating rod (18). A sludge discharge pipe (15) is fixedly installed at the bottom of the collection hopper (14). The sedimentation tank (3) is fixedly installed with a grid-shaped fixing frame (21). The grid-shaped fixing frame (21) has four water inlets. The rotating rod (18) passes through the grid-shaped fixing frame (21) and is rotatably connected to the grid-shaped fixing frame (21). Four porous filter plates (22) are installed in the four water inlets respectively. The bottom of the grid-shaped fixing frame (21) is rotatably equipped with four rotatable blocking plates (23), and the support plate (16) is provided with four sets of traction mechanisms, which are used to drive the four rotatable blocking plates (23) to rotate respectively, so as to realize the sealing and opening of the corresponding water inlet.

2. The integrated flocculation and sedimentation treatment equipment for mining wastewater according to claim 1, characterized in that, Each of the traction mechanisms includes a base (24), a winding reel (25), a pull wire (26), and a second motor (27). The base (24) is fixedly installed on the top of the support plate (16). The winding reel (25) is rotatably installed on the base (24). The pull wire (26) is wound inside the winding reel (25). The free end of the pull wire (26) extends into the sedimentation tank (3) and is fixedly connected to the corresponding rotatable stop plate (23). The second motor (27) is fixedly installed on the base (24). The output shaft of the second motor (27) is fixedly connected to the winding reel (25).

3. The integrated flocculation and sedimentation treatment equipment for mine wastewater according to claim 2, characterized in that, A guide pulley is installed on the base (24), and the pull wire (26) is wound around the groove of the guide pulley.

4. The integrated flocculation and sedimentation treatment equipment for mine wastewater according to claim 3, characterized in that, A perforated circular cover (28) is installed on the inner wall of the sedimentation tank (3) near the drain pipe (20), and the central axis of the perforated circular cover (28) coincides with the drain pipe (20).

5. The integrated flocculation and sedimentation treatment equipment for mine wastewater according to claim 4, characterized in that, The porous dome (28) is rotatably installed inside the sedimentation tank (3). A first pulley (29) is fixedly sleeved on the outer wall of the porous dome (28). A third motor (30) is fixedly installed on the top of the support plate (16). A second pulley (31) is fixedly sleeved on the output shaft of the third motor (30). The same belt (32) is sleeved on the first pulley (29) and the second pulley (31). A cleaning brush (33) is fixedly installed on the bottom of the support plate (16). The cleaning brush (33) is in contact with the outer peripheral wall of the porous dome (28).

6. The integrated flocculation and sedimentation treatment equipment for mine wastewater according to claim 5, characterized in that, The support plate (16) has an avoidance opening, and the belt (32) passes through the avoidance opening and is movably connected to the inner wall of the avoidance opening.

7. A method for treating mine wastewater by flocculation and sedimentation using the integrated flocculation and sedimentation treatment equipment for mine wastewater as described in any one of claims 1-6, characterized in that, Includes the following steps: T1: Vanadium-titanium magnetite beneficiation wastewater is uniformly introduced into the flocculation box (2) through the inlet pipe (4). At the same time, coagulant solution, magnetic medium suspension slurry and coagulant aid solution are prepared respectively. The three agents are connected to the coagulant injection pipe (6), magnetic medium injection pipe (7) and coagulant aid injection pipe (8) respectively. The addition flow rate of each agent is controlled by the quantitative dosing equipment to ensure the accuracy of agent addition. T2: Wastewater flows along the direction of water flow in the serpentine water passage of the flocculation box (2). Coagulant solution is quantitatively added to the front section of the flow channel through the first thin tube at the bottom of the first distribution pipe (9). The high-velocity turbulent environment formed by the narrow spacing in the front section of the flow channel is used to make the coagulant and wastewater mix quickly and fully, destroy the double electric layer stability of the fine mineral mud colloidal particles in the wastewater, and complete the particle destabilization. T3: The destabilized wastewater continues to flow through the front section of the serpentine water passage. Magnetic medium suspension slurry is quantitatively added through the second fine tube at the bottom of the second distribution pipe (10). The magnetic medium solid particles adsorb and combine with the destabilized titanium iron micro-fine mineral mud particles, forming magnetic flocs with the help of magnetic coagulation effect. At the same time, the medium flow velocity environment formed by the gradually expanding channel spacing in the middle section promotes the initial aggregation of the flocs. T4: The magnetic flocs flow into the middle and rear section of the serpentine water passage with the wastewater. The coagulant solution is quantitatively added through the third fine tube at the bottom of the third distribution pipe (11). In the low-velocity stable environment formed by the wide spacing in the rear section of the flow channel, the coagulant fully exerts its bridging effect, causing the magnetic flocs to further aggregate and grow, forming a dense composite floc with high density and easy settling. T5: Wastewater containing composite flocs flows smoothly into the sedimentation tank (3), and solid-liquid stratification is achieved by gravity. The composite flocs quickly settle to the bottom of the sedimentation tank (3), and the supernatant flows upward and is discharged through the drain pipe (20).

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