A lepidolite flotation process

Abstract

The present invention provides a lepidolite flotation wastewater treatment device and a flotation process, which relate to the field of wastewater treatment technology, including a reaction tank, a stirring mechanism, a swinging drug-feeding mechanism, and a spraying mechanism; the stirring mechanism includes a mounting frame fixed to the top of the reaction tank, and the inner side of the mounting frame is vertically rotatably connected to a rotating shaft. This solution ultimately achieves the addition of ferrous sulfate solution into the reaction tank through a spraying mechanism, and then intermittently feeds a diluted H2O2 solution using a swinging drug-feeding mechanism. The H2O2 solution generates strongly oxidizing hydroxyl radicals under the catalysis of the ferrous sulfate solution, thereby destroying the hydrophobic chains and polar groups of the residual reagents, degrading them into small molecular organic matter or mineralizing them into CO2 and H2O, avoiding the residual reagents from hindering subsequent coagulation, precipitation, or adsorption processes, reducing the chemical oxygen demand and toxicity of the wastewater, facilitating subsequent biological treatment of the wastewater, and effectively improving the treatment effect and efficiency of lepidolite metallurgical flotation wastewater.

Description

Technical Field

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

[0002] In the lepidolite metallurgical process, flotation is a key link in mineral processing. Chemical agents (such as collectors, frothers, regulators, etc.) are used to separate lepidolite from other impurity minerals. This process requires a large amount of water as a medium, and thus produces wastewater containing a variety of pollutants, including flotation agent residues. Direct discharge of these wastewaters will inhibit the respiration and reproduction of aquatic organisms and even cause acute poisoning. In addition, solid particles in the wastewater will make the water turbid, hinder sunlight transmission, and affect the photosynthesis of aquatic plants.

[0003] In related technologies, some lepidolite metallurgical flotation wastewater contains a unique double-hydrophilic-double-hydrophobic structure due to the different active agents used. Currently, conventional lepidolite wastewater treatment equipment is unable to effectively remove the agent residues. The residual agents will form stable micelles, encapsulating pollutants such as heavy metals and organic matter, hindering coagulation, sedimentation or adsorption processes, and increasing the chemical oxygen demand and toxicity of the wastewater, inhibiting the efficiency of subsequent biological treatment.

[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 solves the technical problem in the related art that conventional lepidolite wastewater treatment devices are difficult to effectively remove reagent residues.

[0006] In order to solve the above technical problems, the present invention provides a lepidolite flotation wastewater treatment device and a flotation process, which includes a reaction tank, a stirring mechanism, a swinging drug feeding mechanism and a spraying mechanism;

[0007] The stirring mechanism includes a mounting frame fixedly mounted on the top of the reaction tank, a rotating shaft is vertically connected to the inner side of the mounting frame, three sets of stirring paddles are fixed on the surface of the rotating shaft, and a driving motor for driving the rotating shaft to rotate is provided on the top of the mounting frame;

[0008] The swinging medicine-dispensing mechanism includes three rotating seats fixedly arranged on the right side of the mounting frame, the surfaces of the three rotating seats are rotatably connected to rotating sleeves, the surfaces of the three rotating sleeves are fixed with first nozzles by bolts, the surface of the top of the rotating shaft is fixed with a driving gear, the inner side of the mounting frame is rotatably connected to the transmission gear, the transmission gear is meshed with the driving gear, the top of the transmission gear is fixed with a bracket, the surface of the bracket is rotatably connected to the driving connecting rod, the inner side of the right side of the driving connecting rod is rotatably connected to the connecting frame, the connecting frame is fixedly connected to the surface of the rotating sleeve in the middle, and the surfaces of the three rotating sleeves are rotatably connected to two transmission connecting rods;

[0009] The spraying mechanism includes two spraying branches fixedly arranged on the inner wall of the reaction tank. The surfaces of the two spraying branches are connected to the second nozzle, and the backs of the two spraying branches are connected to the spraying main pipe.

[0010] Preferably, drug dispensing branch pipes are fixedly provided at the bottom of the three rotating seats, the bottoms of the drug dispensing branch pipes are connected to the drug dispensing main pipe, and the drug dispensing branch pipes are connected to the first nozzle through a hose.

[0011] Preferably, a groove cooperating with the driving connecting rod is provided on the inner side of the mounting frame. When the transmission gear drives the bracket to rotate, the driving connecting rod pulls the connecting frame and the rotating sleeve in the middle to rotate.

[0012] Preferably, a water wave making mechanism is fixedly provided on the surface of the rotating shaft, and the water wave making mechanism includes a rotating disk fixedly provided on the surface of the rotating shaft, three adjusting screws are threadedly connected to the inner side of the rotating disk, the bottom ends of the three adjusting screws are fixedly provided with a rotating frame, the inner sides of the three rotating frames are rotatably connected with a rotating wheel, the surface of the rotating shaft and the bottom of the rotating disk are provided with a mounting disk, the bottom of the mounting disk is fixedly provided with multiple mounting plates, the inner sides of the multiple mounting plates are fixedly provided with float bags, and the top of the mounting disk is fixed with three bosses.

[0013] Preferably, a threaded groove cooperating with the adjusting screw is provided on the inner side of the rotating disk to allow the adjusting screw to rotate up and down, and a through groove is provided on the inner side of the mounting disk.

[0014] Preferably, a scraping mechanism is fixedly provided at the bottom of the reaction tank, and the scraping mechanism includes a mud collecting box fixedly provided at the bottom of the reaction tank, the inner wall of the mud collecting box is rotatably connected to a bidirectional threaded screw, the surface of the bidirectional threaded screw is threadedly connected to a connecting plate, scrapers are fixedly provided on both sides of the connecting plate, a protective seat is fixedly provided on the back of the mud collecting box, and a scraping motor for driving the bidirectional threaded screw to rotate is provided on the back of the protective seat.

[0015] Preferably, a sewage discharge mechanism is fixed to the bottom of the mud collecting box by bolts, and the sewage discharge mechanism includes a sewage discharge pipe fixed to the bottom of the mud collecting box by bolts, and the inner side of the sewage discharge pipe is rotatably connected to a conveying auger, and the rear ends of the conveying auger and the bidirectional threaded screw are fixed with pulleys, and the surfaces of the two pulleys are provided with belts.

[0016] Preferably, the left side of the reaction tank is connected to two water inlet pipes, the right side of the reaction tank is connected to two drainage pipes, and a plurality of supporting legs are fixedly provided at the bottom of the reaction tank.

[0017] A lepidolite flotation process comprises the following steps:

[0018] S1. Ore pretreatment:

[0019] After coarse, medium and fine crushing, the ore is ground to a particle size of less than 0.074mm to ensure the dissociation of lepidolite monomers. The fine mud is separated by a hydrocyclone or spiral classifier to prevent the mud from interfering with the flotation process.

[0020] S2, Preparation of Tetraester Gemini Surfactant:

[0021] Take a dried reaction bottle, add Bu2Sn(OMe)2C, MeCN, 1,4-dioxane-2,5-hexanedione C4H4O4 A and isocyanate B, seal the bottle with a sealing film, and place it in a microwave reactor;

[0022] The mixture was stirred under microwave irradiation at 100 W to react, and the reaction temperature was measured with an IR sensor. After the reaction, the mixture was quenched with H2O;

[0023] The aqueous phase was extracted with ether, the liquid phases were separated by rapid extraction, and the combined extracts were dried over sodium sulfate and concentrated;

[0024] S3. Slurry preparation and reagent addition:

[0025] The concentration of the ore pulp after grinding is adjusted to 25%~35% to meet the flotation conditions, and then a tetraester-based Gemini surfactant, a conditioning agent and a collector are added in sequence;

[0026] S4, flotation separation:

[0027] Roughing: Air is introduced into the flotation machine, and the lepidolite adsorbed by the collector floats with the bubbles to form a foam layer, which is scraped off to obtain the coarse concentrate, while the gangue minerals sink to the bottom of the tank as tailings;

[0028] Concentration: The coarse concentrate is re-grinded and concentrated two to three times to further remove entrained impurities and improve the grade of lepidolite;

[0029] Sweeping: The rougher tailings are scavenged once or twice to recover the residual lepidolite and reduce resource waste;

[0030] S5. Product dehydration:

[0031] Concentration: The concentrate after flotation is dehydrated through a concentrator to increase the pulp concentration to 50%~60%;

[0032] Filtration: Use a filter press or vacuum filter to further dehydrate to obtain lepidolite concentrate with a moisture content of 15% to 20%;

[0033] Drying: Drying the concentrate to facilitate subsequent metallurgical processing;

[0034] S6. Wastewater treatment:

[0035] The wastewater generated in the flotation stage and dehydration process is passed into the wastewater treatment equipment. After treatment, the flotation wastewater is preferentially reused in the grinding process or flotation slurry adjustment, reducing fresh water consumption and lowering environmental protection costs.

[0036] Compared with related technologies, the lepidolite flotation wastewater treatment equipment and flotation process provided by the present invention have the following beneficial effects:

[0037] When treating lepidolite metallurgical flotation wastewater, a ferrous sulfate solution is first added to the reaction tank through a spraying mechanism, and then a diluted H2O2 solution is intermittently added through a swinging dosing mechanism. The H2O2 solution generates strong oxidizing hydroxyl radicals under the catalysis of the ferrous sulfate solution, thereby destroying the hydrophobic chains and polar groups of the residual reagent, degrading them into small molecular organic matter or mineralizing them into CO2 and H2O, thereby preventing the residual reagent from hindering subsequent coagulation, precipitation or adsorption processes, reducing the chemical oxygen demand and toxicity of the wastewater, facilitating subsequent biological treatment of the wastewater, and effectively improving the treatment effect and efficiency of lepidolite metallurgical flotation wastewater;

[0038] In addition, in view of the fact that local overdose of reagents or dead corners of reaction are prone to occur when H2O2 solution is added, when the H2O2 solution is added, the rotating shaft drives the stirring paddle to mix the wastewater and the solvent, and at the same time drives the driving gear to rotate, and the driving gear then drives the transmission gear and the bracket to rotate. Under the action of the driving connecting rod and the transmission connecting rod, the three first nozzles with different angles are driven to swing back and forth, thereby avoiding dead corners when the H2O2 solution is added, and multi-point intermittent addition is adopted to ensure that the H2O2 solution is fully in contact with the wastewater, reduce local enrichment, and improve the wastewater treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] Figure 1 The best structural diagram provided by the present invention;

[0041] Figure 2 A schematic structural diagram of a rear view provided by the present invention;

[0042] Figure 3 This is a schematic diagram of the structures of the stirring mechanism, swinging medicine-dispensing mechanism and spraying mechanism provided by the present invention;

[0043] Figure 4 for Figure 3 The structural diagram of the stirring mechanism shown;

[0044] Figure 5 for Figure 3 The structural diagram of the swing medicine dispensing mechanism shown;

[0045] Figure 6 for Figure 5 The enlarged structural diagram of point A is shown;

[0046] Figure 7 for Figure 5 The driving gear shown drives the transmission gear to rotate, and the driving connecting rod pulls the connecting frame and the rotating sleeve to rotate under the action of the bracket;

[0047] Figure 8 A schematic structural diagram of the water wave generating mechanism provided by the present invention;

[0048] Figure 9 for Figure 8 The enlarged structural diagram of point B is shown;

[0049] Figure 10 for Figure 8 The rotating shaft shown drives the rotating disk to rotate, so that the rotating wheel presses the boss and the mounting disk downward;

[0050] Figure 11 A schematic diagram of the structure of the scraping mechanism and the sewage discharge mechanism provided by the present invention;

[0051] Figure 12 for Figure 11 The structural diagram of the scraping mechanism shown;

[0052] Figure 13 for Figure 11 The structural diagram of the sewage discharge mechanism shown;

[0053] Figure 14 Schematic diagram of the synthesis route of the tetraester-based Gemini surfactant provided by the present invention.

[0054] Description of Figure Numbers:

[0055] 1. Reaction pool;

[0056] 2. Stirring mechanism; 21. Mounting frame; 22. Rotating shaft; 23. Stirring paddle; 24. Driving motor;

[0057] 3. Swinging dispensing mechanism; 31. Rotating seat; 32. Rotating sleeve; 33. First nozzle; 34. Driving gear; 35. Transmission gear; 36. Bracket; 37. Driving connecting rod; 38. Connecting frame; 39. Transmission connecting rod;

[0058] 4. Spraying mechanism; 41. Spraying branch pipe; 42. Second sprinkler head; 43. Spraying main pipe;

[0059] 5. Drug dispensing branch pipe; 6. Drug dispensing supervisor;

[0060] 7. Water wave generating mechanism; 71. Rotating plate; 72. Adjusting screw; 73. Rotating frame; 74. Rotating wheel; 75. Mounting plate; 76. Mounting plate; 77. Floating bladder; 78. Boss;

[0061] 8. Scraping mechanism; 81. Mud collecting box; 82. Bidirectional threaded screw; 83. Connecting plate; 84. Scraper; 85. Protective seat; 86. Scraping motor;

[0062] 9. Sewage discharge mechanism; 91. Sewage discharge pipe; 92. Conveying auger; 93. Pulley; 94. Belt;

[0063] 10. Water inlet pipe; 11. Drain pipe; 12. Support legs.

[0064] 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

[0065] 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.

[0066] The present invention provides lepidolite flotation wastewater treatment equipment and a flotation process.

[0067] First embodiment:

[0068] See also Figures 1 to 7 , a lepidolite flotation wastewater treatment device, comprising a reaction tank 1, a stirring mechanism 2, a swinging drug delivery mechanism 3 and a spraying mechanism 4;

[0069] The stirring mechanism 2 includes a mounting frame 21 fixed to the top of the reaction tank 1, the inner side of the mounting frame 21 is vertically connected to a rotating shaft 22, the surface of the rotating shaft 22 is fixed with three sets of stirring paddles 23, and the top of the mounting frame 21 is provided with a driving motor 24 for driving the rotating shaft 22 to rotate;

[0070] Please combine Figure 3 : Starting the drive motor 24, the drive motor 24 rotates to drive the rotating shaft 22 to rotate, the rotating shaft 22 rotates and drives the stirring paddle 23 to rotate, and the rotation of the stirring paddle 23 mixes the lithium mica metallurgical flotation wastewater and the solvent;

[0071] Preferably, the inner side of the reaction tank 1 is designed to be arc-shaped, which can promote the liquid mixing effect and avoid dead corners in stirring;

[0072] The swinging medicine dispensing mechanism 3 includes three rotating seats 31 fixedly arranged on the right side of the mounting frame 21, the surfaces of the three rotating seats 31 are rotatably connected to rotating sleeves 32, the surfaces of the three rotating sleeves 32 are fixed with first nozzles 33 by bolts, the surface of the top of the rotating shaft 22 is fixed with a driving gear 34, the inner side of the mounting frame 21 is rotatably connected to a transmission gear 35, the transmission gear 35 is meshed with the driving gear 34, the top of the transmission gear 35 is fixed with a bracket 36, the surface of the bracket 36 is rotatably connected to a driving connecting rod 37, the inner side of the right side of the driving connecting rod 37 is rotatably connected to a connecting frame 38, the connecting frame 38 is fixedly connected to the surface of the rotating sleeve 32 in the middle, and the surfaces of the three rotating sleeves 32 are rotatably connected to two transmission connecting rods 39;

[0073] Please combine Figures 5 to 7 When the rotating shaft 22 rotates, it will simultaneously drive the driving gear 34 to rotate. The driving gear 34 rotates, thereby driving the transmission gear 35 to rotate. The transmission gear 35 rotates and drives the bracket 36 to rotate. When the bracket 36 rotates, it pulls the connecting frame 38 to rotate through the driving connecting rod 37. The rotation of the connecting frame 38 drives the middle rotating sleeve 32 to swing back and forth. The swing of the middle rotating sleeve 32 is driven by the two transmission connecting rods 39, thereby driving the front and rear rotating sleeves 32 to swing, thereby causing the three first nozzles 33 to swing back and forth.

[0074] Preferably, the spray angle of the first nozzle 33 can be adjusted by a bolt. After the three first nozzles 33 are adjusted to different spray angles, the coverage area of ​​the solvent can be increased, ensuring that the solvent is fully mixed with the lepidolite metallurgical flotation wastewater.

[0075] Furthermore, there are two sets of swinging medicine dispensing mechanisms 3, which are mirror images on the left and right.

[0076] Furthermore, the solution sprayed by the swinging medicine dispensing mechanism 3 is a diluted H2O2 solution;

[0077] The spraying mechanism 4 includes two spraying branches 41 fixed to the inner wall of the reaction tank 1. The surfaces of the two spraying branches 41 are connected to the second nozzle 42, and the backs of the two spraying branches 41 are connected to the spraying main pipe 43.

[0078] Preferably, the spraying main pipe 43 is connected to the solvent spraying device, and the spraying main pipe 43 is used to spray ferrous sulfate or ferrous chloride solution;

[0079] A drug dispensing branch pipe 5 is fixedly provided at the bottom of the three rotating seats 31 . The bottom of the drug dispensing branch pipe 5 is connected to a drug dispensing main pipe 6 . The drug dispensing branch pipe 5 is connected to the first nozzle 33 through a hose.

[0080] The inner side of the mounting frame 21 is provided with a groove for use with the driving connecting rod 37. When the transmission gear 35 drives the bracket 36 to rotate, the driving connecting rod 37 pulls the connecting frame 38 and the middle rotating sleeve 32 to rotate.

[0081] In this embodiment, unlike existing wastewater treatment equipment, when treating lepidolite metallurgical flotation wastewater, the present equipment first adds ferrous sulfate solution into the reaction tank 1 through the spraying mechanism 4, and then uses the swinging drug feeding mechanism 3 to intermittently feed the diluted H2O2 solution. The H2O2 solution generates strong oxidizing hydroxyl radicals under the catalysis of the ferrous sulfate solution, thereby destroying the hydrophobic chains and polar groups of the residual reagent, degrading them into small molecular organic matter or mineralizing them into CO2 and H2O, avoiding the residual reagent from hindering the subsequent coagulation precipitation or adsorption process, reducing the chemical oxygen demand and toxicity of the wastewater, facilitating the subsequent biological treatment of the wastewater, and effectively improving the treatment effect and efficiency of the lepidolite metallurgical flotation wastewater;

[0082] In addition, in view of the fact that local overdose of the agent or dead corners of the reaction are prone to occur when the H2O2 solution is added, the rotating shaft 22 drives the stirring paddle 23 to mix the wastewater and the solvent, and at the same time drives the driving gear 34 to rotate. The driving gear 34 then drives the transmission gear 35 and the bracket 36 to rotate. Under the action of the driving connecting rod 37 and the transmission connecting rod 39, the first nozzles 33 at three different angles are driven to swing back and forth, thereby avoiding dead corners when the H2O2 solution is added. In addition, multi-point intermittent addition is adopted to ensure that the H2O2 solution is fully in contact with the wastewater, reduce local enrichment, and improve the wastewater treatment effect.

[0083] Second embodiment:

[0084] See also Figures 8 to 10 The surface of the rotating shaft 22 is fixedly provided with a water wave making mechanism 7, which includes a rotating disk 71 fixedly provided on the surface of the rotating shaft 22. Three adjusting screws 72 are threadedly connected to the inner side of the rotating disk 71. The bottom ends of the three adjusting screws 72 are fixedly provided with a rotating frame 73. The inner sides of the three rotating frames 73 are rotatably connected with rotating wheels 74. A mounting disk 75 is sleeved on the surface of the rotating shaft 22 and located at the bottom of the rotating disk 71. A plurality of mounting plates 76 are fixedly provided at the bottom of the mounting disk 75. Floating bags 77 are fixedly provided on the inner sides of the plurality of mounting plates 76. Three bosses 78 are fixedly provided on the top of the mounting disk 75.

[0085] Please combine Figure 10 When the flotation wastewater enters the reaction tank 1, the buoyancy of the wastewater will cause the float 77 to float and make the mounting plate 75 contact the bottom of the rotating wheel 74. When the rotating shaft 22 rotates, it will drive the rotating plate 71 to rotate at the same time. The rotation of the rotating plate 71 will drive the adjusting screw 72 and the rotating wheel 74 to rotate. When the bottom of the rotating wheel 74 contacts the boss 78, the boss 78 will press the mounting plate 75 and the float 77 downward, pressing the float 77 into the wastewater. When the bottom of the rotating wheel 74 is out of contact with the boss 78, the float 77 will float up again under the buoyancy of the wastewater. The rotating wheel 74 is continuously driven to rotate by the rotating plate 71, so that the float 77 fluctuates up and down in the wastewater, thereby causing waves in the flotation wastewater.

[0086] Furthermore, when the height of the wastewater in the reaction tank 1 remains unchanged, the depth of the downward pressure of the float bladder 77 can be adjusted by adjusting the height of the adjusting screw 72;

[0087] Furthermore, when the rotating shaft 22 drives the stirring paddle 23 to rotate, the wastewater in the reaction tank 1 will rotate clockwise or counterclockwise. Through the arrangement of the multiple mounting plates 76, when the wastewater contacts the mounting plates 76, local turbulence will be formed, thereby enhancing the mixing effect of the solvent and the wastewater.

[0088] Preferably, when the wastewater is stirred, the float 77 may float under the influence of the water flow, and in coordination with the rotation of the rotating wheel 74, the float 77 will form an irregular up and down state. When a guide structure is added to the mounting plate 75 to limit the position of the float 77, in coordination with the rotation of the rotating wheel 74, the float 77 can form a regular up and down state.

[0089] The inner side of the rotating disk 71 is provided with a thread groove for use with the adjusting screw 72 to provide the adjusting screw 72 with the ability to rotate up and down. The inner side of the mounting disk 75 is provided with a through groove.

[0090] In this embodiment, when the device is used to treat lithium mica flotation wastewater, the rotation of the rotating shaft 22 will simultaneously drive the rotating disk 71 to rotate. The rotation of the rotating disk 71 will drive the rotating wheel 74 to rotate through the adjusting screw 72. When the rotating wheel 74 contacts the boss 78 during rotation, the float 77 will be pressed into the wastewater. When the rotating wheel 74 is out of contact with the boss 78, the float 77 will float upward under the action of buoyancy. The rotating wheel 74 continues to rotate, driving the float 77 up and down, thereby causing waves on the surface of the wastewater. The solvent sprayed into the reaction tank 1 is pushed to different positions by the waves, thereby further improving the contact effect between the wastewater and the solvent, shortening the reaction time between the wastewater and the solvent, and thus improving the treatment efficiency of the wastewater.

[0091] Third embodiment:

[0092] See also Figures 11 to 13 A scraping mechanism 8 is fixedly provided at the bottom of the reaction tank 1, and the scraping mechanism 8 includes a mud collecting box 81 fixedly provided at the bottom of the reaction tank 1, and the inner wall of the mud collecting box 81 is rotatably connected to a bidirectional threaded screw 82, and the surface of the bidirectional threaded screw 82 is threadedly connected to a connecting plate 83, and scrapers 84 are fixedly provided on both sides of the connecting plate 83. A protective seat 85 is fixedly provided on the back of the mud collecting box 81, and a scraping motor 86 for driving the bidirectional threaded screw 82 to rotate is provided on the back of the protective seat 85;

[0093] Please combine Figure 12 : Start the scraping motor 86, and the scraping motor 86 rotates to drive the bidirectional threaded screw 82 to rotate, and the bidirectional threaded screw 82 rotates to drive the connecting plate 83 to move back and forth, and the connecting plate 83 moves back and forth to drive the two scrapers 84 to move back and forth, so that the sludge on the inner wall of the mud collecting box 81 can be scraped downwards;

[0094] The bottom of the mud collecting box 81 is fixed with a sewage discharge mechanism 9 by bolts. The sewage discharge mechanism 9 includes a sewage discharge pipe 91 fixed to the bottom of the mud collecting box 81 by bolts. The inner side of the sewage discharge pipe 91 is rotatably connected to a conveying auger 92. The rear ends of the conveying auger 92 and the bidirectional threaded screw 82 are fixed with pulleys 93. The surfaces of the two pulleys 93 are covered with belts 94.

[0095] Please combine Figure 13 : When the bidirectional threaded screw 82 rotates, it will also drive the top pulley 93 to rotate. The top pulley 93 drives the bottom pulley 93 to rotate under the action of the belt 94. The rotation of the bottom pulley 93 then drives the conveying auger 92 to rotate. The sludge is discharged from the mud collecting box 81 through the rotation of the conveying auger 92.

[0096] The left side of the reaction tank 1 is connected to two water inlet pipes 10 , the right side of the reaction tank 1 is connected to two drainage pipes 11 , and a plurality of support legs 12 are fixedly provided at the bottom of the reaction tank 1 .

[0097] In this embodiment, when the sludge generated by the reaction of the solvent and wastewater is discharged, the rotation of the bidirectional threaded screw 82 will drive the connecting plate 83 to move back and forth. By moving the connecting plate 83 back and forth, the sludge on the inner wall of the mud collecting box 81 is scraped downwards, making it easier to clean the reaction tank 1 later.

[0098] Fourth embodiment:

[0099] See also Figure 14 , a lepidolite flotation process, comprising the following steps:

[0100] S1. Ore pretreatment:

[0101] After coarse, medium and fine crushing, the ore is ground to a particle size of less than 0.074mm to ensure the dissociation of lepidolite monomers. The fine mud is separated by a hydrocyclone or spiral classifier to prevent the mud from interfering with the flotation process.

[0102] S2, Preparation of Tetraester Gemini Surfactant:

[0103] Take a dried reaction bottle, add Bu2Sn(OMe)2C, MeCN, 1,4-dioxane-2,5-hexanedione C4H4O4 A and isocyanate B, seal the bottle with a sealing film, and place it in a microwave reactor;

[0104] The mixture was stirred under microwave irradiation at 100 W to react, and the reaction temperature was measured with an IR sensor. After the reaction, the mixture was quenched with H2O;

[0105] The aqueous phase was extracted with ether, the liquid phases were separated by rapid extraction, and the combined extracts were dried over sodium sulfate and concentrated;

[0106] Furthermore, a lepidolite collector is provided, comprising 40-75% of a Gemini surfactant, 5-20% of a foaming agent, and 20-40% of a solvent;

[0107] Furthermore, the foaming agent is one or more of pine oil, methyl isobutyl carbinol, AF-65, isobutyl alcohol methyl ether, sec-octanol, and ether alcohol, and the solvent is water, methanol, ethanol, n-butanol, etc.;

[0108] S3. Slurry preparation and reagent addition:

[0109] The concentration of the ore pulp after grinding is adjusted to 25%~35% to meet the flotation conditions, and then a tetraester-based Gemini surfactant, a conditioning agent and a collector are added in sequence;

[0110] S4, flotation separation:

[0111] Roughing: Air is introduced into the flotation machine, and the lepidolite adsorbed by the collector floats with the bubbles to form a foam layer, which is scraped off to obtain the coarse concentrate, while the gangue minerals sink to the bottom of the tank as tailings;

[0112] Concentration: The coarse concentrate is re-grinded and concentrated two to three times to further remove entrained impurities and improve the grade of lepidolite;

[0113] Sweeping: The rougher tailings are scavenged once or twice to recover the residual lepidolite and reduce resource waste;

[0114] S5. Product dehydration:

[0115] Concentration: The concentrate after flotation is dehydrated through a concentrator to increase the pulp concentration to 50%~60%;

[0116] Filtration: Use a filter press or vacuum filter to further dehydrate to obtain lepidolite concentrate with a moisture content of 15% to 20%;

[0117] Drying: Drying the concentrate to facilitate subsequent metallurgical processing;

[0118] S6. Wastewater treatment:

[0119] The wastewater generated in the flotation stage and dehydration process is passed into the wastewater treatment equipment. After treatment, the flotation wastewater is preferentially reused in the grinding process or flotation slurry adjustment, reducing fresh water consumption and lowering environmental protection costs.

[0120] In this embodiment, a tetraester-based Gemini surfactant is used in the flotation process to float lepidolite. The tetraester-based Gemini surfactant has better selectivity, stronger collecting ability and adaptability than a single amine collector, lowers the dosage of the agent, and is resistant to low temperatures. In addition, a synergistic effect can be produced between the ester group and the secondary amine group, thereby increasing the adsorption of the collector on the surface of the lepidolite mineral, improving the floatability and flotation efficiency of the lepidolite, and achieving better flotation separation indicators than a single group collector, thereby improving the concentrate grade and recovery rate.

[0121] The stability of the tetraester group improves the problem of amine collectors being sensitive to pulp temperature to a certain extent, and also reduces their sensitivity to ore slime. They can maintain a relatively stable flotation effect under different pulp conditions. The synergistic effect of the ester group and the secondary amine group also overcomes the problem of single amine collector flotation foam being too stable and difficult to defoam. The foam fluidity is improved, merging is easier, the flotation foam is small and refreshing, which is beneficial to subsequent flotation operations and concentrate recovery.

[0122] Please refer to the Figures 1 to 14 The working principle of the lepidolite flotation wastewater treatment equipment and flotation process provided by the present invention is as follows:

[0123] Step S1, pre-treating the lithium ore, then preparing a tetraester-based Gemini surfactant, adding various reagents to the ore pulp in sequence, flotating the ore pulp, dehydrating and drying the product after flotation, and passing the wastewater generated in the flotation stage and the dehydration process into the regulating tank. After the wastewater passes through the regulating tank to homogenize the water quality and quantity, the pH value is adjusted to 2.5-3.5, and then passed into the reaction tank 1;

[0124] Step S2, using the spraying mechanism 4 to put the ferrous sulfate solution into the wastewater in the reaction tank 1, and starting the drive motor 24, the drive motor 24 rotates to drive the rotating shaft 22 to rotate, and the rotating shaft 22 rotates to drive the stirring paddle 23 to rotate, and the rotation of the stirring paddle 23 mixes the lepidolite metallurgical flotation wastewater with the ferrous sulfate solution;

[0125] In step S3, when the rotating shaft 22 rotates, the driving gear 34 is driven to rotate, and the driving gear 34 is driven to rotate the transmission gear 35, and the transmission gear 35 is driven to rotate the bracket 36. When the bracket 36 rotates, the connecting frame 38 is pulled to rotate by the driving connecting rod 37. The connecting frame 38 rotates, thereby driving the middle rotating sleeve 32 to swing back and forth. The middle rotating sleeve 32 swings under the action of the two transmission connecting rods 39, thereby driving the front and rear rotating sleeves 32 to swing, and then the three first nozzles 33 to swing back and forth. After the diluted H2O2 solution is sent to the first nozzle 33 through the drug dispensing main pipe 6 and the drug dispensing branch pipe 5, the H2O2 solution is intermittently dispensed at multiple points through the first nozzle 33;

[0126] In step S4, when the rotating shaft 22 rotates, it will drive the rotating disk 71 to rotate at the same time. The rotation of the rotating disk 71 drives the adjusting screw 72 and the rotating wheel 74 to rotate. When the bottom of the rotating wheel 74 contacts the boss 78, the mounting disk 75 and the float 77 are pressed downward through the boss 78, and the float 77 is pressed into the wastewater. When the bottom of the rotating wheel 74 is out of contact with the boss 78, the float 77 will float upward again under the buoyancy of the wastewater. The rotating disk 71 continuously drives the rotating wheel 74 to rotate, so that the float 77 fluctuates up and down in the wastewater, thereby causing waves in the flotation wastewater, thereby increasing the reaction rate of the H2O2 solution and the ferrous sulfate solution, and utilizing the generated strong oxidizing hydroxyl radicals to destroy the hydrophobic chains and polar groups of the residual reagents, thereby effectively removing the residual reagents in the wastewater.

[0127] In step S5, the treated wastewater is transported to the neutralization sedimentation tank through the drain pipe 11, the pH value of the wastewater is adjusted, and sedimentation treatment is performed. Then, the scraping motor 86 is started. The scraping motor 86 rotates to drive the bidirectional threaded screw 82 to rotate. The bidirectional threaded screw 82 rotates to drive the two scrapers 84 to move back and forth through the connecting plate 83, thereby scraping the sludge on the inner wall of the mud collecting box 81 downward.

[0128] When the bidirectional threaded screw 82 rotates, it will simultaneously drive the top pulley 93 to rotate. The top pulley 93 drives the bottom pulley 93 to rotate under the action of the belt 94. The rotation of the bottom pulley 93 drives the conveying auger 92 to rotate. The sludge is discharged from the mud collection box 81 through the rotation of the conveying auger 92.

[0129] In step S6, the sludge is treated by sludge treatment equipment, and the treated wastewater enters the activated carbon adsorption tank or biological treatment tank to further purify the water quality.

[0130] 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 process, characterized in that: The following steps are involved: S1. Ore pretreatment: After coarse, medium and fine crushing, the ore is ground to a particle size of less than 0.074mm to ensure the dissociation of lepidolite monomers. The fine mud is separated by a hydrocyclone or spiral classifier to prevent the mud from interfering with the flotation process. S2, Preparation of Tetraester Gemini Surfactant: Take a dried reaction bottle, add Bu2Sn(OMe)2C, MeCN, 1,4-dioxane-2,5-hexanedione C4H4O4 A and isocyanate B, seal the bottle with a sealing film, and place it in a microwave reactor; The mixture was stirred under microwave irradiation at 100 W to react, and the reaction temperature was measured with an IR sensor. After the reaction, the mixture was quenched with H2O; The aqueous phase was extracted with ether, the liquid phases were separated by rapid extraction, and the combined extracts were dried over sodium sulfate and concentrated; S3. Slurry preparation and reagent addition: The concentration of the ore pulp after grinding is adjusted to 25%~35% to meet the flotation conditions, and then a tetraester-based Gemini surfactant, a conditioning agent and a collector are added in sequence; S4, flotation separation: Roughing: Air is introduced into the flotation machine, and the lepidolite adsorbed by the collector floats with the bubbles to form a foam layer, which is scraped off to obtain the coarse concentrate, while the gangue minerals sink to the bottom of the tank as tailings; Concentration: The coarse concentrate is re-grinded and concentrated two to three times to further remove entrained impurities and improve the grade of lepidolite; Sweeping: The rougher tailings are scavenged once or twice to recover the residual lepidolite and reduce resource waste; S5. Product dehydration: Concentration: The concentrate after flotation is dehydrated through a concentrator to increase the pulp concentration to 50%~60%; Filtration: Use a filter press or vacuum filter to further dehydrate to obtain lepidolite concentrate with a moisture content of 15% to 20%; Drying: Drying the concentrate to facilitate subsequent metallurgical processing; S6. Wastewater treatment: The wastewater generated in the flotation stage and dehydration process is passed into the wastewater treatment equipment. After treatment, the flotation wastewater is preferentially reused in the grinding process or flotation slurry adjustment, reducing fresh water consumption and lowering environmental protection costs.

2. The lepidolite flotation process according to claim 1, wherein The lepidolite flotation process uses the following lepidolite flotation wastewater treatment equipment, including a reaction tank, a stirring mechanism, a swinging dosing mechanism, and a spraying mechanism; The stirring mechanism includes a mounting frame fixedly mounted on the top of the reaction tank, a rotating shaft is vertically connected to the inner side of the mounting frame, three sets of stirring paddles are fixed on the surface of the rotating shaft, and a driving motor for driving the rotating shaft to rotate is provided on the top of the mounting frame; The swinging medicine-dispensing mechanism includes three rotating seats fixedly arranged on the right side of the mounting frame, the surfaces of the three rotating seats are rotatably connected to rotating sleeves, the surfaces of the three rotating sleeves are fixed with first nozzles by bolts, the surface of the top of the rotating shaft is fixed with a driving gear, the inner side of the mounting frame is rotatably connected to the transmission gear, the transmission gear is meshed with the driving gear, the top of the transmission gear is fixed with a bracket, the surface of the bracket is rotatably connected to the driving connecting rod, the inner side of the right side of the driving connecting rod is rotatably connected to the connecting frame, the connecting frame is fixedly connected to the surface of the rotating sleeve in the middle, and the surfaces of the three rotating sleeves are rotatably connected to two transmission connecting rods; The spraying mechanism includes two spraying branches fixedly arranged on the inner wall of the reaction tank. The surfaces of the two spraying branches are connected to the second nozzle, and the backs of the two spraying branches are connected to the spraying main pipe.

3. The lepidolite flotation process according to claim 2, wherein: A medicine feeding branch pipe is fixedly provided at the bottom of the three rotating seats. The bottom of the medicine feeding branch pipe is connected to the medicine feeding main pipe. The medicine feeding branch pipe is connected to the first nozzle through a hose.

4. The lepidolite flotation process according to claim 2, wherein: A groove cooperating with the driving connecting rod is provided on the inner side of the mounting frame. When the transmission gear drives the bracket to rotate, the driving connecting rod pulls the connecting frame and the rotating sleeve in the middle to rotate.

5. The lepidolite flotation process according to claim 2, wherein: A water wave making mechanism is fixedly provided on the surface of the rotating shaft, and the water wave making mechanism includes a rotating disk fixedly provided on the surface of the rotating shaft, three adjusting screws are threadedly connected to the inner side of the rotating disk, the bottom ends of the three adjusting screws are fixedly provided with a rotating frame, the inner sides of the three rotating frames are rotatably connected with a rotating wheel, the surface of the rotating shaft and the bottom of the rotating disk are provided with a mounting disk, a plurality of mounting plates are fixedly provided at the bottom of the mounting disk, a plurality of floating bags are fixedly provided on the inner sides of the mounting plates, and three bosses are fixedly provided on the top of the mounting disk.

6. The lepidolite flotation process according to claim 5, wherein: The inner side of the rotating disk is provided with a thread groove used in conjunction with the adjusting screw to provide the adjusting screw with the ability to rotate up and down, and the inner side of the mounting disk is provided with a through groove.

7. The lepidolite flotation process according to claim 2, wherein: A scraping mechanism is fixedly provided at the bottom of the reaction tank, and the scraping mechanism includes a mud collecting box fixedly provided at the bottom of the reaction tank, the inner wall of the mud collecting box is rotatably connected to a bidirectional threaded screw, the surface of the bidirectional threaded screw is threadedly connected to a connecting plate, scrapers are fixedly provided on both sides of the connecting plate, a protective seat is fixedly provided on the back of the mud collecting box, and a scraping motor for driving the bidirectional threaded screw to rotate is provided on the back of the protective seat.

8. The lepidolite flotation process according to claim 7, wherein: A sewage discharge mechanism is fixed to the bottom of the mud collecting box by bolts, and the sewage discharge mechanism includes a sewage discharge pipe fixed to the bottom of the mud collecting box by bolts. The inner side of the sewage discharge pipe is rotatably connected to a conveying auger. The rear ends of the conveying auger and the bidirectional threaded screw are fixed with pulleys, and the surfaces of the two pulleys are provided with belts.

9. The lepidolite flotation process according to claim 2, wherein: The left side of the reaction tank is connected to two water inlet pipes, the right side of the reaction tank is connected to two drainage pipes, and a plurality of supporting legs are fixedly provided at the bottom of the reaction tank.

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