Lepidolite flotation wastewater treatment device and flotation process

Abstract

The invention provides a lepidolite flotation wastewater treatment device and a flotation process, and relates to the technical field of wastewater treatment, the lepidolite flotation wastewater treatment device comprises an oxidation reaction tank, a multi-point feeding mechanism and a swing mechanism; the multi-point feeding mechanism comprises a mounting plate, a liquid outlet pipe and a two-way threaded screw rod, the two sides of the mounting plate are fixedly connected with the inner wall of the oxidation reaction tank, a sliding rail is fixedly arranged at the top of the mounting plate, and a moving seat is slidably connected to the surface of the sliding rail. According to the scheme, when the amidoxime lepidolite-containing flotation wastewater is treated, ferrous sulfate and hydrogen peroxide are added into the flotation wastewater, so that oximido and amino of amidoxime are destroyed, complexed heavy metals are released, macromolecular organic matters are degraded, the heavy metals are ensured to be completely free, and the heavy metals in effluent are prevented from exceeding the standard; in addition, the hydrogen peroxide is gradually added in a multi-point mode, bumping caused by local over-concentration is avoided, inner side spraying is adopted during spraying, and bumping of the liquid level due to the fact that the hydrogen peroxide is directly sprayed downwards and settles to the bottom of the pool under the action of gravity is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a lepidolite flotation wastewater treatment device and a flotation process. Background Art

[0002] In the process of lithium extraction from lepidolite, flotation is currently commonly used to separate lepidolite from gangue minerals to improve the grade of lithium concentrate and provide raw materials for subsequent lithium extraction. However, a large amount of wastewater is generated during the lepidolite flotation process. The wastewater mainly contains pollutants such as flotation agent residues, dissolved mineral components and suspended matter. If untreated wastewater is discharged directly, it will cause water pollution and soil pollution.

[0003] In related technologies, lepidolite flotation wastewater contains flotation agent residues and must be treated in a wastewater treatment facility before discharge. However, existing lepidolite flotation wastewater treatment facilities are not suitable for effectively treating lepidolite flotation wastewater containing amide oximes. Amidoxime collectors, with their molecular structure containing oxime and amino groups, have strong chelating properties and readily form stable complexes with metal ions such as lithium and aluminum. These complexes are difficult to biodegrade, interfere with heavy metal precipitation, and result in excessive heavy metal content in the effluent.

[0004] Therefore, it is necessary to provide a lepidolite flotation wastewater treatment device and a flotation process to solve the above technical problems. Summary of the Invention

[0005] The present invention provides a lepidolite flotation wastewater treatment device and a flotation process, which solve the technical problem that the existing lepidolite flotation wastewater treatment device in the related art is not convenient for effectively treating lepidolite flotation wastewater containing amide oximes.

[0006] In order to solve the above technical problems, the present invention provides a lepidolite flotation wastewater treatment device comprising an oxidation reaction tank, a multi-point dosing mechanism and a swing mechanism; The multi-point dosing mechanism includes a mounting plate, a liquid outlet pipe and a bidirectional threaded screw. Both sides of the mounting plate are fixedly connected to the inner wall of the oxidation reaction tank. A slide rail is fixed on the top of the mounting plate. A movable seat is slidably connected to the surface of the slide rail. The front end of the liquid outlet pipe is rotatably connected to the movable seat. The swing mechanism includes a key rod sleeve, a gear and two limit brackets. The surface of the key rod sleeve is rotatably connected to the inner side of the movable seat, the key rod sleeve is connected to the front key slot of the liquid outlet pipe, the surface of the key rod sleeve is clamped with the limit sleeve rod, the front side of the key rod sleeve is fixedly connected to the back side of the gear, the top of the mounting plate is fixed with a second tooth plate and a first tooth plate in sequence from front to back, and the two limit brackets are fixedly connected to the two sides of the top of the mounting plate respectively.

[0007] Preferably, both ends of the bidirectional threaded screw are rotatably connected to the inner side of the oxidation reaction tank, the surface of the bidirectional threaded screw is threadedly connected to a screw block, the top of the screw block is fixedly connected to the bottom of the movable seat, and the surface of the liquid outlet pipe is connected to multiple nozzles.

[0008] Preferably, the surfaces of the two limit brackets are provided with guide grooves, which are used in conjunction with the limit sleeve rod to adjust the position of the limit sleeve rod in the moving seat. By adjusting the position of the limit sleeve rod in the moving seat, the front and rear positions of the key rod sleeve and the gear are adjusted.

[0009] Preferably, the inner wall of the oxidation reaction tank is laterally connected to a mixing mechanism, and the mixing mechanism includes a rotating rod rotatably connected to the inner wall of the oxidation reaction tank, and a plurality of mixing racks are fixedly provided on the surface of the rotating rod. A driving motor for driving the rotating rod to rotate is provided on the right side of the oxidation reaction tank.

[0010] Preferably, a transmission mechanism is fixedly provided at the left end of the rotating rod, and the transmission mechanism includes two pulleys fixedly provided at the left end of the rotating rod and the bidirectional threaded screw, and a transmission belt is provided on the surface of the two pulleys, and a protective shell is fixedly provided on the left side of the oxidation reaction tank.

[0011] Preferably, a negative pressure suction mechanism is fixedly provided at the left end of the rotating rod, and the negative pressure suction mechanism includes an active gear disk fixedly provided at the left end of the rotating rod, and the left side of the oxidation reaction tank is rotatably connected to a passive gear through a rotating shaft, and the active gear disk is engaged with the passive gear, and a cam is fixedly provided on the left side of the passive gear, and the surface of the cam is rotatably connected to a connecting rod, and the top of the connecting rod is rotatably connected to a vacuum rod, and a piston is fixedly provided on the top of the vacuum rod, and an exhaust pipe is fixedly provided on the left side of the oxidation reaction tank, and the surface of the piston is slidably connected to the inner side of the exhaust pipe.

[0012] Preferably, a detection mechanism is fixedly provided at the bottom of the mounting plate, and the detection mechanism includes a connecting plate fixedly provided at the bottom of the mounting plate, a slider is slidably connected to the inner side of the connecting plate, a rotating wheel is rotatably connected to the back side of the slider, a connecting bracket is fixedly provided on the front side of the slider, a detector is provided on the inner side of the connecting bracket, a spring is fixedly provided on the inner side of the connecting plate, and a convex plate is fixedly provided at the bottom of the screw block.

[0013] Preferably, a sealing plate is provided on the top of the oxidation reaction tank, two storage boxes are provided on the top of the sealing plate, two mounting brackets are fixedly provided on the inner wall of the oxidation reaction tank, ultraviolet lamps are provided on the inner sides of the two mounting brackets, a drain pipe is connected to the bottom of the oxidation reaction tank, a protective frame is fixedly provided on the left side of the oxidation reaction tank, and a plurality of supporting legs are fixedly provided at the bottom of the oxidation reaction tank.

[0014] A lepidolite flotation process comprises the following steps: Step S1, preparing an amide oxime collector compound: Aldoxime, water, and catalyst were introduced into a Teflon-terminated sealed tube under nitrogen atmosphere. The reaction mixture was stirred at 100 degrees Celsius for three hours, and the reaction progress was monitored by taking samples regularly. The crude reaction mixture was dissolved with dichloromethane and analyzed by GC, the solvent was concentrated under reduced pressure, and the crude reaction mixture was purified by column chromatography on silica gel using methanol or dichloromethane as eluent to obtain the product; Step S2: preparing a mixed flotation agent: 30-60% of an amide oxime collector compound, 15-35% of a cationic collector, 1-3% of a pH adjuster, 1-10% of an antioxidant, and 10-50% of a solvent; Step S3, flotation: The concentrate after magnetic separation is poured into the flotation tank, the pH value of the pulp is adjusted by acid and alkali, and the mixed flotation agent is slowly added. After stirring for 10 minutes, the flotation machine is turned on for roughing to obtain roughing concentrate and roughing tailings. The roughing tailings are added with flotation agent for scavenging to obtain scavenged concentrate and scavenged tailings. The scavenged concentrate is returned to the roughing for re-floatation. Flotation agent is added to the rougher concentrate and scavenged ore obtained from the roughing to perform the first concentration to obtain first concentrated middlings and first concentrated concentrate. The first concentrated middlings are returned to the roughing, and the first concentrated concentrate is subjected to the second concentration. After adding flotation agent and stirring, the concentrate is then subjected to the next flotation, and the middlings are returned to the previous flotation operation to obtain lepidolite concentrate. Step S4, wastewater treatment: The pH value of the pretreated flotation wastewater is adjusted to 2.5-3.5, ferrous sulfate is added as a catalyst, and the reaction is stirred for fifteen minutes. Then, hydrogen peroxide is gradually added to the oxidation reaction tank at multiple points through the nozzle. The addition method adopts a combination of inner spraying and swing spraying. After the reaction is completed, neutralization and precipitation treatment is carried out to deeply remove free heavy metals and deeply degrade and treat organic matter.

[0015] Compared with related technologies, the lepidolite flotation wastewater treatment device and flotation process provided by the present invention have the following beneficial effects: When treating lepidolite flotation wastewater containing amidoxime, ferrous sulfate and hydrogen peroxide are added to the flotation wastewater to destroy the oxime and amino groups of the amidoxime, release complexed heavy metals, degrade macromolecular organic matter, ensure the complete liberation of heavy metals, and avoid excessive heavy metal content in the effluent. Hydrogen peroxide is also added in a multi-point progressive manner to avoid local over-concentration leading to violent boiling. During spraying, inboard spraying is used to prevent hydrogen peroxide from being sprayed directly downward and settling to the bottom of the pool under gravity, which would cause violent boiling on the liquid surface. When switching the dosing point to the right, the gear contacts the first tooth plate, causing the key rod sleeve to drive the liquid outlet pipe and the nozzle to rotate clockwise, resulting in clockwise swing dosing of the hydrogen peroxide. When switching the dosing point to the left, the gear contacts the second tooth plate, causing the key rod sleeve to drive the liquid outlet pipe and the nozzle to rotate counterclockwise, resulting in counterclockwise swing dosing of the hydrogen peroxide, thereby increasing the contact area between the hydrogen peroxide and the flotation wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 The best structural diagram provided by the present invention; Figure 2 A schematic structural diagram of a left view of an oxidation reaction tank provided by the present invention; Figure 3 for Figure 1 A schematic structural diagram of a cross-sectional view of an oxidation reaction tank is shown; Figure 4 A schematic structural diagram of the multi-point dosing mechanism and the swing mechanism provided by the present invention; Figure 5 for Figure 4 The enlarged structural diagram of point A is shown; Figure 6 for Figure 4 The structural diagram of the liquid outlet pipe shown; Figure 7 This is a schematic diagram of the state in which the movable seat provided by the present invention moves to the right, the gear contacts the first tooth plate, and the liquid outlet pipe is driven to rotate clockwise through the key rod sleeve; Figure 8 This is a schematic diagram of a state in which the movable seat provided by the present invention moves to the right, and after the limit sleeve rod contacts the right limit bracket, the key rod sleeve and the gear are driven to move forward; Figure 9 A schematic diagram of a state in which the movable seat provided by the present invention moves to the left and the gear is about to contact the second tooth plate; Figure 10 A schematic structural diagram of the mixing mechanism provided by the present invention; Figure 11 A schematic structural diagram of the transmission mechanism provided by the present invention; Figure 12 A schematic structural diagram of the negative pressure suction mechanism provided by the present invention; Figure 13 for Figure 12 A schematic structural diagram of a cross-sectional view of an exhaust pipe is shown; Figure 14 A schematic structural diagram of the detection mechanism provided by the present invention; Figure 15 for Figure 14 A schematic structural diagram of a rear view of the connecting plate shown; Figure 16 A schematic diagram of a rear view of the screw block provided by the present invention moving to the left and the convex plate coming into contact with the rotating wheel; Figure 17 The present invention provides a synthetic flow chart of benzylamide oxime.

[0018] Description of Figure Numbers: 1. Oxidation reaction tank; 2. Multi-point dosing mechanism; 21. Mounting plate; 22. Liquid outlet pipe; 23. Bidirectional threaded screw; 24. Slide rail; 25. Moving seat; 26. Screw block; 27. Sprinkler; 3. Swing mechanism; 31. Key rod sleeve; 32. Gear; 33. Limit bracket; 34. Limit sleeve rod; 35. Second gear plate; 36. First gear plate; 4. Mixing mechanism; 41. Rotating rod; 42. Mixing frame; 43. Driving motor; 5. Transmission mechanism; 51. Pulley; 52. Transmission belt; 53. Protective shell; 6. Negative pressure suction mechanism; 61. Driving gear plate; 62. Passive gear; 63. Cam; 64. Connecting rod; 65. Pumping rod; 66. Piston; 67. Pumping pipe; 7. Detection mechanism; 71. Connecting plate; 72. Slider; 73. Rotating wheel; 74. Connecting bracket; 75. Detector; 76. Spring; 77. Convex plate; 8. Sealing plate; 9. Storage box; 10. Mounting frame; 11. UV lamp; 12. Drain pipe; 13. Protective frame; 14. Support legs.

[0019] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] The present invention provides a lepidolite flotation wastewater treatment device and a flotation process.

[0022] First embodiment: See also Figures 1 to 9 , a lepidolite flotation wastewater treatment device, comprising an oxidation reaction tank 1, a multi-point dosing mechanism 2 and a swing mechanism 3; The multi-point dosing mechanism 2 includes a mounting plate 21, a liquid outlet pipe 22 and a bidirectional threaded screw 23. Both sides of the mounting plate 21 are fixedly connected to the inner wall of the oxidation reaction tank 1. A slide rail 24 is fixed on the top of the mounting plate 21. A movable seat 25 is slidably connected to the surface of the slide rail 24. The front end of the liquid outlet pipe 22 is rotatably connected to the movable seat 25. The two ends of the bidirectional threaded screw 23 are rotatably connected to the inner side of the oxidation reaction tank 1. The surface of the bidirectional threaded screw 23 is threadedly connected to a screw block 26. The top of the screw block 26 is fixedly connected to the bottom of the movable seat 25. The surface of the liquid outlet pipe 22 is connected to a plurality of nozzles 27. Please combine Figure 4 : The bidirectional threaded screw 23 rotates to drive the screw block 26 to move rightward, and the rightward movement of the screw block 26 drives the moving seat 25 to move rightward. The rightward movement of the moving seat 25 drives the liquid outlet pipe 22 and the nozzle 27 to move leftward, thereby adjusting the working position of the nozzle 27; Preferably, the nozzle 27 is used to spray hydrogen peroxide. Before spraying hydrogen peroxide, the pH value of the flotation wastewater is adjusted to 2.5-3.5, and then ferrous sulfate is added as a catalyst and stirred for fifteen minutes. The nozzle 27 adopts a multi-point progressive addition method when adding hydrogen peroxide, and the addition points are the left, middle and right sides of the oxidation reaction tank 1; The swing mechanism 3 includes a key rod sleeve 31, a gear 32 and two limit brackets 33. The surface of the key rod sleeve 31 is rotatably connected to the inner side of the movable seat 25. The key rod sleeve 31 is connected to the front keyway of the liquid outlet pipe 22. The surface of the key rod sleeve 31 is clamped with a limit sleeve rod 34. The front side of the key rod sleeve 31 is fixedly connected to the back side of the gear 32. The top of the mounting plate 21 is fixedly provided with a second tooth plate 35 and a first tooth plate 36 in sequence from front to back. The two limit brackets 33 are respectively fixedly connected to the two sides of the top of the mounting plate 21. Please combine Figures 4 to 9When the movable seat 25 moves to the right, the gear 32 comes into contact with the first tooth plate 36. Under the action of the first tooth plate 36, the tooth plate 32 drives the liquid outlet pipe 22 and the nozzle 27 to rotate clockwise through the key rod sleeve 31, thereby adjusting the spraying angle of the nozzle 27, increasing the contact area between the hydrogen peroxide and the flotation wastewater, and rotating the nozzle 27 to the left. When the movable seat 25 continues to move to the right, the limit sleeve 34 contacts the right limit bracket 33. Under the action of the limit bracket 33, the limit sleeve 34 drives the key rod sleeve 31 to slide forward on the inner side of the movable seat 25, and the key rod sleeve 31 moves, thereby driving the gear 32 to move forward. After the movement, the hydrogen peroxide is sprayed and dispensed once from the right delivery point. Furthermore, when the movable base 25 moves rightward to the right delivery point and then moves leftward, the gear 32 contacts the second tooth plate 35 during the movement. Under the action of the second tooth plate 35, the tooth plate 32 drives the liquid outlet pipe 22 and the nozzle 27 to rotate counterclockwise through the key rod sleeve 31, thereby swinging and spraying hydrogen peroxide and rotating the nozzle 27 to the right. When the movable base 25 continues to move leftward, the limit sleeve 34 contacts the left limit bracket 33. Under the action of the limit bracket 33, the limit sleeve 34 drives the key rod sleeve 31 and the gear 32 to move backward, thereby resetting the position of the gear 32. When the movable base 25 moves to the left delivery point, the hydrogen peroxide is sprayed to the right through the nozzle 27. Preferably, the key rod sleeve 31 can rotate inside the limiting sleeve 34 through the clamping design between the limiting sleeve 34 and the key rod sleeve 31, and when the limiting sleeve 34 moves forward and backward, it will drive the key rod sleeve 31 to move forward and backward at the same time; The surfaces of the two limit brackets 33 are both provided with guide grooves, which are used in conjunction with the limit sleeve rod 34 to adjust the position of the limit sleeve rod 34 in the moving seat 25. By adjusting the position of the limit sleeve rod 34 in the moving seat 25, the front and rear positions of the key rod sleeve 31 and the gear 32 are adjusted.

[0023] In this embodiment, unlike the existing flotation wastewater treatment device, this device adds ferrous sulfate and hydrogen peroxide to the flotation wastewater when treating lepidolite flotation wastewater containing amide oxime, thereby destroying the oxime group and amino group of the amide oxime, releasing the complexed heavy metals, degrading the macromolecular organic matter, ensuring that the heavy metals are completely free, and avoiding excessive heavy metals in the effluent. In addition, multi-point progressive addition of hydrogen peroxide is adopted to avoid local excessive concentration leading to violent boiling. In the spraying process, inner spraying is adopted to avoid the hydrogen peroxide being sprayed directly downward. The liquid settles to the bottom of the pool under the action of gravity, causing the liquid surface to boil violently. When the feeding point is switched to the right, the gear 32 contacts the first tooth plate 36, causing the key rod sleeve 31 to drive the liquid outlet pipe 22 and the nozzle 27 to rotate clockwise, so that the hydrogen peroxide is fed in a clockwise swinging manner. When the feeding point is switched to the left, the gear 32 contacts the second tooth plate 35, causing the key rod sleeve 31 to drive the liquid outlet pipe 22 and the nozzle 27 to rotate counterclockwise, so that the hydrogen peroxide is fed in a counterclockwise swinging manner, thereby increasing the contact area between the hydrogen peroxide and the flotation wastewater.

[0024] Second embodiment: See also Figure 3 、 Figure 10 and Figure 11 The inner wall of the oxidation reaction tank 1 is laterally rotatably connected to a mixing mechanism 4, and the mixing mechanism 4 includes a rotating rod 41 rotatably connected to the inner wall of the oxidation reaction tank 1, and a plurality of mixing racks 42 are fixedly provided on the surface of the rotating rod 41. A driving motor 43 for driving the rotating rod 41 to rotate is provided on the right side of the oxidation reaction tank 1; Please combine Figure 10 : Start the driving motor 43, the driving motor 43 rotates to drive the rotating rod 41 to rotate, the rotating rod 41 rotates to drive the mixing frame 42 to rotate, thereby mixing the flotation wastewater and the reagent.

[0025] The left end of the rotating rod 41 is fixedly provided with a transmission mechanism 5, and the transmission mechanism 5 includes two pulleys 51 fixedly provided on the rotating rod 41 and the left end of the bidirectional threaded screw 23, and the surfaces of the two pulleys 51 are provided with a transmission belt 52. A protective shell 53 is fixedly provided on the left side of the oxidation reaction tank 1; Please combine Figure 11 When the rotating rod 41 rotates, it drives the bottom pulley 51 to rotate, and the bottom pulley 51 rotates through the transmission belt 52 to drive the top pulley 51 to rotate, and the top pulley 51 then drives the bidirectional threaded screw 23 to rotate.

[0026] In this embodiment, by starting the drive motor 43, the drive motor 43 drives the mixing frame 42 to rotate through the rotating rod 41, thereby mixing the flotation wastewater and the reagent. When the rotating rod 41 rotates, it drives the bottom pulley 51 to rotate, and the bottom pulley 51 drives the top pulley 51 to rotate through the transmission belt 52. The top pulley 51 then drives the bidirectional threaded screw 23 to rotate.

[0027] Third embodiment: See also Figure 1 、 Figure 2 、 Figures 12 to 16 , the left end of the rotating rod 41 is fixedly provided with a negative pressure suction mechanism 6, and the negative pressure suction mechanism 6 includes a driving gear plate 61 fixedly provided at the left end of the rotating rod 41, and the left side of the oxidation reaction tank 1 is rotatably connected to a passive gear 62 through a rotating shaft, and the driving gear plate 61 is engaged with the passive gear 62, and a cam 63 is fixedly provided on the left side of the passive gear 62, and the surface of the cam 63 is rotatably connected to a connecting rod 64, and the top of the connecting rod 64 is rotatably connected to an air pumping rod 65, and a piston 66 is fixedly provided on the top of the air pumping rod 65, and an air pumping pipe 67 is fixedly provided on the left side of the oxidation reaction tank 1, and the surface of the piston 66 is slidably connected to the inner side of the air pumping pipe 67; Please combine Figure 12 and Figure 13 : When the rotating rod 41 rotates, it will simultaneously drive the active gear plate 61 to rotate, the active gear plate 61 rotates and drives the passive gear 62 to rotate, the passive gear 62 drives the cam 63 to rotate, the cam 63 drives the pumping rod 65 to move up and down through the connecting rod 64, and the pumping rod 65 then drives the piston 66 to move up and down in the pumping pipe 67, thereby extracting the toxic and harmful gases in the oxidation reaction tank 1; Preferably, the top of the exhaust pipe 67 is connected to an extraction pipe, which is connected to the oxidation reaction tank 1, and the rear side of the exhaust pipe 67 is connected to an exhaust pipe, which is connected to the gas treatment device; A detection mechanism 7 is fixedly provided at the bottom of the mounting plate 21. The detection mechanism 7 includes a connecting plate 71 fixedly provided at the bottom of the mounting plate 21. A slider 72 is slidably connected to the inner side of the connecting plate 71. A rotating wheel 73 is rotatably connected to the back side of the slider 72. A connecting bracket 74 is fixedly provided on the front side of the slider 72. A detector 75 is provided on the inner side of the connecting bracket 74. A spring 76 is fixedly provided on the inner side of the connecting plate 71. A convex plate 77 is fixedly provided at the bottom of the screw block 26. Please combine Figure 16 When the screw block 26 drives the movable seat 25 to move to the left delivery point, it will also drive the convex plate 77 to move to the left. When the convex plate 77 contacts the rotating wheel 73, it will press the rotating wheel 73 downward. The rotating wheel 73 moves downward and drives the slider 72 to slide downward on the inner side of the connecting plate 71. The slider 72 drives the detector 75 downward through the connecting bracket 74, so that the bottom end of the detector 75 is inserted into the flotation wastewater to detect the pH value of the flotation wastewater. Furthermore, when the screw block 26 drives the movable seat 25 to move to the right, the convex plate 77 loses contact with the rotating wheel 73, and the slider 72 slides upward in the connecting plate 71 through the elastic force of the spring 76. The slider 72 moves through the connecting bracket 74 to drive the detector 75 to move upward, thereby resetting the position of the detector 75.

[0028] A sealing plate 8 is provided on the top of the oxidation reaction tank 1, and two storage boxes 9 are provided on the top of the sealing plate 8. Two mounting brackets 10 are fixed on the inner wall of the oxidation reaction tank 1, and ultraviolet lamps 11 are provided inside the two mounting brackets 10. A drain pipe 12 is connected to the bottom of the oxidation reaction tank 1. A protective frame 13 is fixed on the left side of the oxidation reaction tank 1, and a plurality of support legs 14 are fixed at the bottom of the oxidation reaction tank 1. Preferably, the two storage boxes 9 are used to store ferrous sulfate and hydrogen peroxide respectively.

[0029] In this embodiment, when ferrous sulfate and hydrogen peroxide are added and mixed with the flotation wastewater using the rotating rod 41 and the mixing rack 42, the rotating rod 41 rotates through the active gear disc 61 to drive the passive gear 62 to rotate, and the passive gear 62 drives the suction rod 65 and the piston 66 to move up and down through the cam 63 and the connecting rod 64, thereby extracting the toxic and harmful gases in the oxidation reaction tank 1. In addition, when hydrogen peroxide is added progressively at multiple points, when the screw block 26 moves to the left feeding point, the convex plate 77 will contact the rotating wheel 73, and the sliding block 72, the connecting bracket 74 and the detector 75 will be pressed downward by the rotating wheel 73, so that the bottom end of the detector 75 is inserted into the flotation wastewater to detect the pH value of the flotation wastewater.

[0030] Fourth embodiment: See also Figure 17 , a lepidolite flotation process comprising the following steps: Step S1, preparing an amide oxime collector compound: Aldoxime, water, and catalyst were introduced into a Teflon-terminated sealed tube under nitrogen atmosphere. The reaction mixture was stirred at 100 degrees Celsius for three hours, and the reaction progress was monitored by taking samples regularly. The crude reaction mixture was dissolved with dichloromethane and analyzed by GC, the solvent was concentrated under reduced pressure, and the crude reaction mixture was purified by column chromatography on silica gel using methanol or dichloromethane as eluent to obtain the product; Step S2: preparing a mixed flotation agent: 30-60% of an amide oxime collector compound, 15-35% of a cationic collector, 1-3% of a pH adjuster, 1-10% of an antioxidant, and 10-50% of a solvent; Preferably, the cationic collector includes one or more of dodecylamine, tetradecylamine, hexadecylamine, coconut amine, and dodecyltrimethylammonium chloride; The pH adjuster includes one or more of sulfuric acid, sodium carbonate, sodium hydroxide and triethanolamine; The antioxidant includes one or more of hydroquinone, tert-butylhydroquinone, glycerol, surfactants and fatty acids; Solvents include water or alcohol; Step S3, flotation: The concentrate after magnetic separation is poured into the flotation tank, the pH value of the pulp is adjusted by acid and alkali, and the mixed flotation agent is slowly added. After stirring for 10 minutes, the flotation machine is turned on for roughing to obtain roughing concentrate and roughing tailings. The roughing tailings are added with flotation agent for scavenging to obtain scavenged concentrate and scavenged tailings. The scavenged concentrate is returned to the roughing for re-floatation. Flotation agent is added to the rougher concentrate and scavenged ore obtained from the roughing to perform the first concentration to obtain first concentrated middlings and first concentrated concentrate. The first concentrated middlings are returned to the roughing, and the first concentrated concentrate is subjected to the second concentration. After adding flotation agent and stirring, the concentrate is then subjected to the next flotation, and the middlings are returned to the previous flotation operation to obtain lepidolite concentrate. Step S4, wastewater treatment: The pH value of the pretreated flotation wastewater is adjusted to 2.5-3.5, ferrous sulfate is added as a catalyst, and the reaction is stirred for fifteen minutes. Then, hydrogen peroxide is gradually added to the oxidation reaction tank 1 at multiple points through the nozzle 27. The addition method adopts a combination of inner spraying and swing spraying. After the reaction is completed, neutralization and precipitation treatment is carried out to deeply remove free heavy metals and deeply degrade and treat organic matter.

[0031] In this embodiment, compared with the currently popular lepidolite collector, benzylhydroxamic acid, the molecular structure of amidoxime enables it to have stronger selective adsorption ability for specific active sites on the surface of lepidolite than hydroxamic acid. It can interact with the metal ions on the surface of lepidolite more accurately to form stable chemical bonds or complexes, thereby more effectively separating lepidolite from other gangue minerals during the flotation process and improving the grade of lepidolite concentrate.

[0032] Please refer to the Figures 1 to 17 The working principle of the lepidolite flotation wastewater treatment device provided by the present invention is as follows: Step S1, adjusting the pH value of the pretreated flotation wastewater to 2.5-3.5, then adding ferrous sulfate as a catalyst, removing the transmission belt 52, starting the drive motor 43, and rotating the drive motor 43 to drive the mixing frame 42 to rotate through the rotating rod 41, stirring and mixing the ferrous sulfate and the flotation wastewater for 15 minutes; Step S2: After the stirring time is up, the transmission belt 52 is reinstalled and the drive motor 43 is started. The drive motor 43 rotates through the rotating rod 41 under the action of the transmission belt 52, driving the two pulleys 51 to rotate. The rotation of the top pulley 51 drives the bidirectional threaded screw 23 to rotate. The rotation of the bidirectional threaded screw 23 drives the screw block 26 and the movable seat 25 to move back and forth left and right, thereby adjusting the working position of the liquid outlet pipe 22 and the nozzle 27. In step S3, when the movable seat 25 moves to the right, the gear 32 comes into contact with the first tooth plate 36. Under the action of the first tooth plate 36, the tooth plate 32 drives the liquid outlet pipe 22 and the nozzle 27 to rotate clockwise through the key rod sleeve 31, thereby adjusting the spraying angle of the nozzle 27, increasing the contact area between the hydrogen peroxide and the flotation wastewater, and rotating the nozzle 27 to the left. When the movable seat 25 continues to move to the right, the limit sleeve 34 contacts the right limit bracket 33. Under the action of the limit bracket 33, the limit sleeve 34 drives the key rod sleeve 31 to slide forward on the inner side of the movable seat 25, and the key rod sleeve 31 moves, thereby driving the gear 32 to move forward. After the movement, the hydrogen peroxide is sprayed and dispensed once from the right delivery point. Step S4: After the movable base 25 moves rightward to the right delivery point and then moves leftward, the gear 32 contacts the second tooth plate 35 during the movement. Under the action of the second tooth plate 35, the tooth plate 32 drives the liquid outlet pipe 22 and the nozzle 27 to rotate counterclockwise through the key rod sleeve 31, thereby swinging and spraying hydrogen peroxide and rotating the nozzle 27 to the right. When the movable base 25 continues to move leftward, the limit sleeve 34 contacts the left limit bracket 33. Under the action of the limit bracket 33, the limit sleeve 34 drives the key rod sleeve 31 and the gear 32 to move backward, thereby resetting the position of the gear 32. When the movable base 25 moves to the left delivery point, the hydrogen peroxide is sprayed to the right through the nozzle 27. In step S5, when the rotating rod 41 rotates, it simultaneously drives the active gear plate 61 to rotate, and the active gear plate 61 rotates, which drives the passive gear 62 to rotate, and the passive gear 62 drives the cam 63 to rotate. The cam 63 drives the pumping rod 65 to move up and down through the connecting rod 64, and the pumping rod 65 then drives the piston 66 to move up and down in the pumping pipe 67, thereby extracting the toxic and harmful gases in the oxidation reaction tank 1; In step S6, when the screw block 26 drives the movable base 25 to move to the left delivery point, it also drives the convex plate 77 to move to the left. When the convex plate 77 contacts the rotating wheel 73, the rotating wheel 73 is pressed downward. The rotating wheel 73 moves downward, driving the slider 72 to slide downward on the inner side of the connecting plate 71. The slider 72 drives the detector 75 downward through the connecting bracket 74, so that the bottom end of the detector 75 is inserted into the flotation wastewater to detect the pH value of the flotation wastewater.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A lepidolite flotation wastewater treatment device, characterized in that: It includes an oxidation reaction tank, a multi-point dosing mechanism and a swing mechanism; The multi-point dosing mechanism includes a mounting plate, a liquid outlet pipe and a bidirectional threaded screw. Both sides of the mounting plate are fixedly connected to the inner wall of the oxidation reaction tank. A slide rail is fixed on the top of the mounting plate. A movable seat is slidably connected to the surface of the slide rail. The front end of the liquid outlet pipe is rotatably connected to the movable seat. The swing mechanism includes a key rod sleeve, a gear and two limit brackets. The surface of the key rod sleeve is rotatably connected to the inner side of the movable seat, the key rod sleeve is connected to the front key slot of the liquid outlet pipe, the surface of the key rod sleeve is clamped with the limit sleeve rod, the front side of the key rod sleeve is fixedly connected to the back side of the gear, the top of the mounting plate is fixed with a second tooth plate and a first tooth plate in sequence from front to back, and the two limit brackets are fixedly connected to the two sides of the top of the mounting plate respectively.

2. The lepidolite flotation wastewater treatment device according to claim 1, wherein The two ends of the bidirectional threaded screw are rotatably connected to the inner side of the oxidation reaction tank, the surface of the bidirectional threaded screw is threadedly connected to a screw block, the top of the screw block is fixedly connected to the bottom of the movable seat, and the surface of the liquid outlet pipe is connected to multiple nozzles.

3. The lepidolite flotation wastewater treatment device according to claim 1, wherein The surfaces of the two limit brackets are provided with guide grooves, which are used in conjunction with the limit sleeve rod to adjust the position of the limit sleeve rod in the moving seat. By adjusting the position of the limit sleeve rod in the moving seat, the front and rear positions of the key rod sleeve and the gear are adjusted.

4. The lepidolite flotation wastewater treatment device according to claim 1, wherein The inner wall of the oxidation reaction tank is laterally connected to a mixing mechanism, and the mixing mechanism includes a rotating rod rotatably connected to the inner wall of the oxidation reaction tank. A plurality of mixing racks are fixedly provided on the surface of the rotating rod. A driving motor for driving the rotating rod to rotate is provided on the right side of the oxidation reaction tank.

5. The lepidolite flotation wastewater treatment device according to claim 4, wherein: A transmission mechanism is fixedly provided at the left end of the rotating rod, and the transmission mechanism includes two pulleys fixedly provided at the rotating rod and the left end of the bidirectional threaded screw. A transmission belt is sleeved on the surface of the two pulleys, and a protective shell is fixedly provided on the left side of the oxidation reaction tank.

6. The lepidolite flotation wastewater treatment device according to claim 4, wherein: The left end of the rotating rod is fixedly provided with a negative pressure suction mechanism, and the negative pressure suction mechanism includes an active gear plate fixedly provided at the left end of the rotating rod, and the left side of the oxidation reaction tank is rotatably connected to a passive gear through a rotating shaft, and the active gear plate is engaged with the passive gear, and a cam is fixedly provided on the left side of the passive gear, and the surface of the cam is rotatably connected to a connecting rod, and the top of the connecting rod is rotatably connected to a suction rod, and a piston is fixedly provided on the top of the suction rod, and an exhaust pipe is fixedly provided on the left side of the oxidation reaction tank, and the surface of the piston is slidably connected to the inner side of the exhaust pipe.

7. The lepidolite flotation wastewater treatment device according to claim 2, wherein: A detection mechanism is fixedly provided at the bottom of the mounting plate, and the detection mechanism includes a connecting plate fixedly provided at the bottom of the mounting plate, a slider is slidably connected to the inner side of the connecting plate, a rotating wheel is rotatably connected to the back side of the slider, a connecting bracket is fixedly provided on the front side of the slider, a detector is provided on the inner side of the connecting bracket, a spring is fixedly provided on the inner side of the connecting plate, and a convex plate is fixedly provided at the bottom of the screw block.

8. The lepidolite flotation wastewater treatment device according to claim 1, wherein: A sealing plate is provided on the top of the oxidation reaction tank, two storage boxes are provided on the top of the sealing plate, two mounting brackets are fixedly provided on the inner wall of the oxidation reaction tank, ultraviolet lamps are provided on the inner sides of the two mounting brackets, a drain pipe is connected to the bottom of the oxidation reaction tank, a protective frame is fixedly provided on the left side of the oxidation reaction tank, and a plurality of supporting legs are fixedly provided at the bottom of the oxidation reaction tank.

9. A lepidolite flotation process, characterized in that: The lepidolite flotation wastewater treatment device according to any one of claims 1 to 8 comprises the following steps: Step S1, preparing an amide oxime collector compound: Aldoxime, water, and catalyst were introduced into a Teflon-terminated sealed tube under nitrogen atmosphere. The reaction mixture was stirred at 100 degrees Celsius for three hours, and the reaction progress was monitored by taking samples regularly. The crude reaction mixture was dissolved with dichloromethane and analyzed by GC, the solvent was concentrated under reduced pressure, and the crude reaction mixture was purified by column chromatography on silica gel using methanol or dichloromethane as eluent to obtain the product; Step S2: preparing a mixed flotation agent: 30-60% of an amide oxime collector compound, 15-35% of a cationic collector, 1-3% of a pH adjuster, 1-10% of an antioxidant, and 10-50% of a solvent; Step S3, flotation: The concentrate after magnetic separation is poured into the flotation tank, the pH value of the pulp is adjusted by acid and alkali, and the mixed flotation agent is slowly added. After stirring for 10 minutes, the flotation machine is turned on for roughing to obtain roughing concentrate and roughing tailings. The roughing tailings are added with flotation agent for scavenging to obtain scavenged concentrate and scavenged tailings. The scavenged concentrate is returned to the roughing for re-floatation. Flotation agent is added to the rougher concentrate and scavenged ore obtained from the roughing to perform the first concentration to obtain first concentrated middlings and first concentrated concentrate. The first concentrated middlings are returned to the roughing, and the first concentrated concentrate is subjected to the second concentration. After adding flotation agent and stirring, the concentrate is then subjected to the next flotation, and the middlings are returned to the previous flotation operation to obtain lepidolite concentrate. Step S4, wastewater treatment: The pH value of the pretreated flotation wastewater is adjusted to 2.5-3.5, ferrous sulfate is added as a catalyst, and the reaction is stirred for fifteen minutes. Then, hydrogen peroxide is gradually added to the oxidation reaction tank at multiple points through the nozzle. The addition method adopts a combination of inner spraying and swing spraying. After the reaction is completed, neutralization and precipitation treatment is carried out to deeply remove free heavy metals and deeply degrade and treat organic matter.

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