Lepidolite flotation wastewater treatment equipment and flotation process

Abstract

The invention provides lepidolite flotation wastewater treatment equipment and a flotation process, and relates to the technical field of wastewater treatment, the lepidolite flotation wastewater treatment equipment comprises a reaction tank, a stirring mechanism, a swing dosing mechanism and a spraying mechanism; the stirring mechanism comprises a mounting frame fixedly arranged at the top of the reaction tank, and a rotating shaft is vertically and rotatably connected to the inner side of the mounting frame. According to the scheme, a ferrous sulfate solution is finally added into the reaction tank through the spraying mechanism, then a diluted H2O2 solution is intermittently fed through the swing medicine feeding mechanism, the H2O2 solution generates strong oxidizing hydroxyl free radicals under the catalysis of the ferrous sulfate solution, and therefore hydrophobic chains and polar groups of residual medicine are destroyed, and the medicine is obtained. The lepidolite metallurgical flotation wastewater is degraded into small molecular organic matters or mineralized into CO2 and H2O, so that the phenomenon that the subsequent coagulating sedimentation or adsorption process is hindered by residual chemicals is avoided, the chemical oxygen demand and toxicity of the wastewater are reduced, the subsequent biological treatment on the wastewater is facilitated, and the treatment effect and efficiency of the lepidolite metallurgical flotation wastewater are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly to a lithium mica flotation wastewater treatment device and a flotation process. Background Art

[0002] In the metallurgy process of lithium mica, flotation is a key link in ore dressing. Lithium mica is separated from other impurity minerals through chemical agents (such as collectors, frothers, regulators, etc.). This process requires a large amount of water as a medium, so wastewater containing various pollutants will be generated, among which there are residues of flotation agents. Direct discharge will inhibit the respiration and reproduction of aquatic organisms and even cause acute poisoning. Moreover, the solid particles in the wastewater will make the water turbid, hinder the transmission of sunlight, and affect the photosynthesis of aquatic plants.

[0003] In the related art, due to different surfactants used in the flotation wastewater of lithium mica metallurgy, some wastewater contains a unique double hydrophilic group - double hydrophobic group structure. Currently, conventional lithium mica wastewater treatment devices are difficult to effectively remove the residues of its agents. The residual agents will form stable micelles, encapsulating pollutants such as heavy metals and organic substances, hindering the coagulation precipitation or adsorption process, and will increase the chemical oxygen demand and toxicity of the wastewater, inhibiting the efficiency of subsequent biological treatment.

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

[0005] The present invention provides a lithium mica flotation wastewater treatment device and a flotation process, which solve the technical problem that conventional lithium mica wastewater treatment devices in the related art are difficult to effectively remove the residues of agents.

[0006] To solve the above technical problems, the lithium mica flotation wastewater treatment device and flotation process provided by the present invention include a reaction tank, a stirring mechanism, a swinging chemical dosing mechanism, and a spraying mechanism; The stirring mechanism includes a mounting frame fixedly arranged on the top of the reaction tank. A rotating shaft is vertically rotatably connected to the inner side of the mounting frame. Three stirring paddles are fixedly arranged on the surface of the rotating shaft. A driving motor for driving the rotation of the rotating shaft is arranged on the top of the mounting frame; The swinging medicine - dropping mechanism includes three rotating seats fixed to the right side of the mounting frame. The surfaces of the three rotating seats are all rotatably connected with rotating sleeves. The surfaces of the three rotating sleeves are all fixedly provided with first nozzles through bolts. The surface of the top of the rotating shaft is fixedly provided with a driving gear. The inner side of the mounting frame is rotatably connected with a transmission gear. The transmission gear meshes with the driving gear. The top of the transmission gear is fixedly provided with a bracket. The surface of the bracket is rotatably connected with a driving connecting rod. The inner side of the right side of the driving connecting rod is rotatably connected with a connecting frame. The connecting frame is fixedly connected with the surface of the middle rotating sleeve. The surfaces of the three rotating sleeves are rotatably connected with two transmission connecting rods; The spraying mechanism includes two spraying branch pipes fixed to the inner wall of the reaction tank. The surfaces of the two spraying branch pipes are both communicated with second nozzles. The back surfaces of the two spraying branch pipes are communicated with a spraying main pipe.

[0007] Preferably, the bottoms of the three rotating seats are fixedly provided with medicine - dropping branch pipes. The bottoms of the medicine - dropping branch pipes are communicated with a medicine - dropping main pipe. The medicine - dropping branch pipes are communicated with the first nozzles through hoses.

[0008] Preferably, a groove for cooperating with the driving connecting rod is opened on the inner side of the mounting frame. When the transmission gear drives the bracket to rotate, the connecting frame and the middle rotating sleeve are pulled to rotate through the driving connecting rod.

[0009] Preferably, a water - wave generating mechanism is fixedly provided on the surface of the rotating shaft. The water - wave generating mechanism includes a rotating disk fixedly provided on the surface of the rotating shaft. The inner side of the rotating disk is threadedly connected with three adjusting screws. The bottom ends of the three adjusting screws are all fixedly provided with rotating frames. The inner sides of the three rotating frames are all rotatably connected with rotating wheels. A mounting disk is sleeved on the surface of the rotating shaft and at the bottom of the rotating disk. The bottom of the mounting disk is fixedly provided with a plurality of mounting plates. A floating bladder is fixedly provided inside the plurality of mounting plates. Three bosses are fixedly provided on the top of the mounting disk.

[0010] Preferably, a thread groove for cooperating with the adjusting screw is arranged on the inner side of the rotating disk, which can provide the up - and - down rotation of the adjusting screw. A through - groove is opened on the inner side of the mounting disk.

[0011] Preferably, a scraping mechanism is fixedly provided at the bottom of the reaction tank. The scraping mechanism includes a sludge - collecting box fixedly provided at the bottom of the reaction tank. A bidirectional threaded screw is rotatably connected to the inner wall of the sludge - collecting box. A connecting plate is threadedly connected to the surface of the bidirectional threaded screw. Scrapers are fixedly provided on both sides of the connecting plate. A protective seat is fixedly provided on the back of the sludge - collecting box. A scraping motor for driving the bidirectional threaded screw to rotate is arranged on the back of the protective seat.

[0012] Preferably, a sewage discharge mechanism is fixedly installed at the bottom of the sludge collecting tank through bolts. The sewage discharge mechanism includes a sewage discharge pipe fixedly installed at the bottom of the sludge collecting tank through bolts. A conveying auger is rotatably connected to the inner side of the sewage discharge pipe. Pulley wheels are fixedly installed at the rear ends of the conveying auger and the double-threaded lead screw. A belt is sleeved on the surfaces of the two pulley wheels.

[0013] Preferably, two water inlet pipes are communicated with the left side of the reaction tank, two drain pipes are communicated with the right side of the reaction tank, and a plurality of support legs are fixedly installed at the bottom of the reaction tank.

[0014] A spodumene flotation process includes the following steps: S1. Ore pretreatment: After the raw ore is coarsely crushed, medium-crushed, and finely crushed, the ore particle size is ground to less than 0.074 mm to ensure the dissociation of spodumene monomers. The fine mud is separated by a hydrocyclone or a spiral classifier to avoid the interference of ore mud on the flotation process. S2. Preparation of tetraester-based Gemini surfactant: Take a dried reaction flask, add Bu2Sn(OMe)2 C, MeCN, 1,4-dioxane-2,5-hexanedione C4H4O4 A, and isocyanate B. Seal the small bottle with a sealing film and place it in a microwave reactor. Stir the mixture under microwave radiation of 100 W for reaction. Measure the reaction temperature with an IR sensor. After the reaction, quench the mixture with H2O. Extract the aqueous phase with ether. Quickly extract and separate each layer of the liquid phase. The combined extracts are dried with sodium sulfate and concentrated. S3. Slurry adjustment and reagent addition: Adjust the concentration of the milled pulp to 25% - 35% to suit the flotation conditions, and then sequentially add various flotation reagents such as tetraester-based Gemini surfactant, regulator, and collector. S4. Flotation separation: Rough selection: Pass air into the flotation machine. The spodumene adsorbed by the collector floats with the bubbles to form a foam layer. After scraping, the rough concentrate is obtained, and the gangue minerals sink to the bottom of the tank as tailings. Concentrate selection: The rough concentrate is reground and concentrated two to three times to further remove the entrained impurities and improve the spodumene grade. Scavenging: Conduct one to two scavenging operations on the rough selection tailings to recover the residual spodumene and reduce resource waste. S5. Product dehydration: Concentration: The concentrate after flotation is dehydrated by a thickener to increase the pulp concentration to 50% - 60%. Filtration: Further dehydrate using a plate and frame filter press or a vacuum filter to obtain spodumene concentrate with a moisture content of 15% - 20%. Drying: The concentrate is dried to facilitate subsequent metallurgical processing; S6. Wastewater treatment: The wastewater generated in the flotation stage and the dewatering process is introduced into the wastewater treatment equipment. After the flotation wastewater is treated, it is preferentially recycled to the grinding process or flotation pulp preparation to reduce the consumption of fresh water and lower the environmental protection cost.

[0015] Compared with the related technologies, the lithium mica flotation wastewater treatment equipment and flotation process provided by the present invention have the following beneficial effects: When treating the lithium mica metallurgical flotation wastewater, first, a ferrous sulfate solution is added to the reaction tank through a spraying mechanism, and then a diluted H2O2 solution is intermittently added by a swinging chemical dosing 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 agents, degrading them into small-molecule organic substances or mineralizing them into CO2 and H2O, avoiding the residual agents 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 lithium mica metallurgical flotation wastewater; Moreover, in view of the characteristics that local overdose or reaction dead angles are likely to occur during the addition of the H2O2 solution, when adding the H2O2 solution, 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. 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, three first nozzles with different angles are driven to swing reciprocally, thereby avoiding dead angles during the addition of the H2O2 solution, and adopting multi-point intermittent dosing to ensure full contact between the H2O2 solution and the wastewater, reducing local enrichment, and improving the wastewater treatment effect. Description of the drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0017] Figure 1 It is the best structural schematic diagram provided by the present invention; Figure 2 It is the structural schematic diagram of the rear view provided by the present invention; Figure 3 It is the structural schematic diagram of the stirring mechanism, the swinging chemical dosing mechanism and the spraying mechanism provided by the present invention; Figure 4 For Figure 3 The structural schematic diagram of the stirring mechanism shown; Figure 5 is Figure 3 a schematic structural diagram of the swinging medicine - feeding mechanism shown Figure 6 is Figure 5 an enlarged schematic structural diagram at position A shown Figure 7 is Figure 5 a state schematic diagram in which the driving gear drives the transmission gear to rotate, and under the action of the bracket, the driving connecting rod pulls the connecting frame and the rotating sleeve to rotate, as shown Figure 8 is a schematic structural diagram of the water - wave generating mechanism provided by the present invention Figure 9 is Figure 8 an enlarged schematic structural diagram at position B shown Figure 10 is Figure 8 a state schematic diagram in which the rotating shaft drives the rotating disk to rotate, and the rotating wheel presses the convex platform and the mounting disk downward, as shown Figure 11 is a schematic structural diagram of the scraping mechanism and the sewage - discharging mechanism provided by the present invention Figure 12 is Figure 11 a schematic structural diagram of the scraping mechanism shown Figure 13 is Figure 11 a schematic structural diagram of the sewage - discharging mechanism shown Figure 14 is a schematic diagram of the synthesis route of the tetra - ester - based Gemini surfactant provided by the present invention

[0018] Explanation of the reference numerals in the drawings: 1. Reaction tank 2. Stirring mechanism; 21. Mounting frame; 22. Rotating shaft; 23. Stirring paddle; 24. Driving motor 3. Swinging medicine - feeding 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 4. Spraying mechanism; 41. Spraying branch pipe; 42. Second nozzle; 43. Spraying main pipe 5. Medicine - feeding branch pipe; 6. Medicine - feeding main pipe 7. Water - wave generating mechanism; 71. Rotating disk; 72. Adjusting screw; 73. Rotating frame; 74. Rotating wheel; 75. Mounting disk; 76. Mounting plate; 77. Floating bladder; 78. Convex platform 8. Scraping mechanism; 81. Mud - collecting box; 82. Bidirectional threaded lead screw; 83. Connecting plate; 84. Scraper; 85. Protective seat; 86. Scraping motor 9. Sewage discharge mechanism; 91. Sewage discharge pipe; 92. Conveyor auger; 93. Pulley; 94. Belt; 10. Water inlet pipe; 11. Drain pipe; 12. Support leg.

[0019] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

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

[0022] First Embodiment: Please refer to Figures 1 to 7 , a lepidolite flotation wastewater treatment device, including a reaction tank 1, a stirring mechanism 2, a swinging chemical dosing mechanism 3 and a spraying mechanism 4; The stirring mechanism 2 includes a mounting frame 21 fixedly arranged on the top of the reaction tank 1. A rotating shaft 22 is vertically rotatably connected to the inner side of the mounting frame 21. Three stirring paddles 23 are fixedly arranged on the surface of the rotating shaft 22. A driving motor 24 for driving the rotation of the rotating shaft 22 is arranged on the top of the mounting frame 21; Please combine Figure 3 : Start the driving motor 24. The driving motor 24 rotates to drive the rotating shaft 22 to rotate. The rotating shaft 22 rotates to drive the stirring paddles 23 to rotate. Through the rotation of the stirring paddles 23, the lepidolite metallurgical flotation wastewater and the solvent are mixed; Preferably, the inner side of the reaction tank 1 is designed in an arc shape, which can promote the liquid mixing effect and avoid dead corners during stirring; The swinging chemical dosing 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 all rotatably connected with rotating sleeves 32. The surfaces of the three rotating sleeves 32 are all fixedly provided with first spray nozzles 33 through bolts. The surface of the top of the rotating shaft 22 is fixedly provided with a driving gear 34. The inner side of the mounting frame 21 is rotatably connected with a transmission gear 35. The transmission gear 35 meshes with the driving gear 34. The top of the transmission gear 35 is fixedly provided with a bracket 36. The surface of the bracket 36 is rotatably connected with a driving connecting rod 37. The inner side of the right side of the driving connecting rod 37 is rotatably connected with a connecting frame 38. The connecting frame 38 is fixedly connected with the surface of the middle rotating sleeve 32. The surfaces of the three rotating sleeves 32 are rotatably connected with two transmission connecting rods 39; Please combine with Figures 5 to 7 : When the rotating shaft 22 rotates, it will drive the driving gear 34 to rotate at the same time. The rotation of the driving gear 34 drives the transmission gear 35 to rotate. The rotation of the transmission gear 35 drives the bracket 36 to rotate. When the bracket 36 rotates, it will pull 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 reciprocally. Under the action of the two transmission connecting rods 39, the swinging of the middle rotating sleeve 32 drives the front and rear rotating sleeves 32 to swing, so that the three first spray nozzles 33 swing reciprocally; Preferably, the spraying angle of the first spray nozzle 33 can be adjusted by bolts. After adjusting the three first spray nozzles 33 to different spraying angles, the coverage area of the solvent can be made larger to ensure that the solvent is fully mixed with the lepidolite metallurgical flotation wastewater; Further, there are two groups of swinging chemical dosing mechanisms 3, which are arranged in left-right mirror image; Furthermore, the solution sprayed by the swinging chemical dosing mechanism 3 is a diluted H2O2 solution; The spraying mechanism 4 includes two spraying branch pipes 41 fixedly arranged on the inner wall of the reaction tank 1. The surfaces of the two spraying branch pipes 41 are both communicated with second spray nozzles 42. The back of the two spraying branch pipes 41 is communicated with a spraying main pipe 43; Preferably, the spraying main pipe 43 is communicated with the solvent spraying device, and the spraying main pipe 43 is used for spraying ferrous sulfate or ferrous chloride solution; The bottoms of the three rotating seats 31 are fixedly provided with chemical dosing branch pipes 5. The bottoms of the chemical dosing branch pipes 5 are communicated with a chemical dosing main pipe 6. The chemical dosing branch pipes 5 are communicated with the first spray nozzles 33 through hoses.

[0023] A groove matched with the driving connecting rod 37 is arranged on the inner side of the mounting frame 21. When the transmission gear 35 drives the bracket 36 to rotate, the connecting frame 38 and the middle rotating sleeve 32 are pulled to rotate through the driving connecting rod 37.

[0024] In this embodiment, different from the existing wastewater treatment equipment, when treating lepidolite metallurgical flotation wastewater, this equipment first adds ferrous sulfate solution into the reaction tank 1 through the spraying mechanism 4, and then intermittently discharges the diluted H2O2 solution by using the swinging chemical dosing mechanism 3. 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 agents, degrading them into small molecule organic substances or mineralizing them into CO2 and H2O, avoiding the residual agents 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 lepidolite metallurgical flotation wastewater; Moreover, aiming at the characteristics that local reagent overdose or reaction dead angles are likely to occur during the dosing of the H2O2 solution, when discharging the H2O2 solution, while the rotating shaft 22 drives the stirring paddle 23 to mix the wastewater and the solvent, it also drives the driving gear 34 to rotate. The driving gear 34 then drives the transmission gear 35 and the support 36 to rotate. Under the action of the driving connecting rod 37 and the transmission connecting rod 39, three first nozzles 33 with different angles are driven to swing reciprocally, thereby avoiding dead angles during the dosing of the H2O2 solution, and adopting multi-point intermittent dosing to ensure full contact between the H2O2 solution and the wastewater, reduce local enrichment, and improve the wastewater treatment effect.

[0025] Second Embodiment: Please refer to Figures 8 to 10 , a water wave generating mechanism 7 is fixedly arranged on the surface of the rotating shaft 22. The water wave generating mechanism 7 includes a rotating disc 71 fixedly arranged on the surface of the rotating shaft 22. Three adjusting screws 72 are threadedly connected to the inner side of the rotating disc 71. The bottom ends of the three adjusting screws 72 are fixedly provided with rotating frames 73. The inner sides of the three rotating frames 73 are rotatably connected with rotating wheels 74. An installation disc 75 is sleeved on the surface of the rotating shaft 22 and at the bottom of the rotating disc 71. A plurality of mounting plates 76 are fixedly arranged at the bottom of the installation disc 75. A floating bladder 77 is fixedly arranged inside the plurality of mounting plates 76. Three bosses 78 are fixedly arranged on the top of the installation disc 75; Please combine with Figure 10: When flotation wastewater enters the reaction tank 1, the buoyancy of the wastewater will cause the floating bladder 77 to float up, 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 disk 71 to rotate at the same time. The rotation of the rotating disk 71 will drive the adjusting screw 72 and the rotating wheel 74 to rotate. When the bottom of the rotating wheel 74 contacts the convex platform 78, it will press the mounting plate 75 and the floating bladder 77 downward through the convex platform 78, and press the floating bladder 77 into the wastewater. When the bottom of the rotating wheel 74 disengages from the convex platform 78, the floating bladder 77 will float up again under the buoyancy of the wastewater. By continuously driving the rotating wheel 74 to rotate through the rotating disk 71, the floating bladder 77 will fluctuate up and down in the wastewater, and then make the flotation wastewater have waves; Further, when the height of the wastewater in the reaction tank 1 remains unchanged, by adjusting the height of the adjusting screw 72, the pressing depth of the floating bladder 77 can be adjusted; 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 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; Preferably, when the wastewater is stirred, the floating bladder 77 may float under the influence of the water flow. In cooperation with the rotation of the rotating wheel 74, the floating bladder 77 will form an irregular up-and-down fluctuation state. When a guiding structure is added to the mounting plate 75 to limit the position of the floating bladder 77, in cooperation with the rotation of the rotating wheel 74, the floating bladder 77 can form a regular up-and-down fluctuation state.

[0026] A threaded groove for cooperating with the adjusting screw 72 is provided inside the rotating disk 71, which can provide the up-and-down rotation of the adjusting screw 72, and a through groove is opened inside the mounting plate 75.

[0027] In this embodiment, when the device treats the lepidolite flotation wastewater, the rotation of the rotating shaft 22 will drive the rotating disk 71 to rotate at the same time. 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 convex platform 78 during the rotation process, the floating bladder 77 will be pressed into the wastewater. When the rotating wheel 74 disengages from the convex platform 78, the floating bladder 77 will float up under the action of buoyancy. By continuously rotating the rotating wheel 74, the floating bladder 77 will fluctuate up and down, so that waves will appear on the surface of the wastewater. Through the waves, the solvent sprayed into the reaction tank 1 will be pushed to different positions, 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.

[0028] Third Embodiment: Please refer to Figures 11 to 13, a scraping mechanism 8 is fixedly installed at the bottom of the reaction tank 1. The scraping mechanism 8 includes a sludge collection tank 81 fixedly installed at the bottom of the reaction tank 1. A bidirectional threaded screw rod 82 is rotatably connected to the inner wall of the sludge collection tank 81. A connecting plate 83 is threadedly connected to the surface of the bidirectional threaded screw rod 82. Scrapers 84 are fixedly installed on both sides of the connecting plate 83. A protective seat 85 is fixedly installed on the back of the sludge collection tank 81. A scraping motor 86 for driving the bidirectional threaded screw rod 82 to rotate is arranged on the back of the protective seat 85; Please combine with Figure 12 : Start the scraping motor 86. The rotation of the scraping motor 86 drives the rotation of the bidirectional threaded screw rod 82. The rotation of the bidirectional threaded screw rod 82 drives the connecting plate 83 to move back and forth. The back-and-forth movement of the connecting plate 83 drives the two scrapers 84 to move back and forth, and then the sludge on the inner wall of the sludge collection tank 81 can be scraped downward; A sewage discharge mechanism 9 is fixedly installed at the bottom of the sludge collection tank 81 through bolts. The sewage discharge mechanism 9 includes a sewage discharge pipe 91 fixedly installed at the bottom of the sludge collection tank 81 through bolts. A conveying auger 92 is rotatably connected to the inside of the sewage discharge pipe 91. Pulley wheels 93 are fixedly installed at the rear ends of the conveying auger 92 and the bidirectional threaded screw rod 82. A belt 94 is sleeved on the surfaces of the two pulley wheels 93; Please combine with Figure 13 : When the bidirectional threaded screw rod 82 rotates, it will drive the top pulley wheel 93 to rotate at the same time. The top pulley wheel 93 drives the bottom pulley wheel 93 to rotate under the action of the belt 94. The rotation of the bottom pulley wheel 93 drives the conveying auger 92 to rotate, and the sludge is discharged from the sludge collection tank 81 through the rotation of the conveying auger 92.

[0029] Two water inlet pipes 10 are communicated with the left side of the reaction tank 1. Two drain pipes 11 are communicated with the right side of the reaction tank 1. A plurality of support legs 12 are fixedly installed at the bottom of the reaction tank 1.

[0030] In this embodiment, when discharging the sludge generated during the reaction of the solvent and the wastewater outward, the rotation of the bidirectional threaded screw rod 82 drives the connecting plate 83 to move back and forth. Through the back-and-forth movement of the connecting plate 83, the sludge on the inner wall of the sludge collection tank 81 is scraped downward, which is convenient for subsequent cleaning of the reaction tank 1.

[0031] Fourth Embodiment: Please refer to Figure 14 , a spodumene flotation process, the following steps: S1. Ore pretreatment: After the raw ore is coarsely crushed, medium crushed and finely crushed, the particle size of the ore is ground to less than 0.074 mm to ensure the dissociation of spodumene monomers. The fine mud is separated by a hydrocyclone or a spiral classifier to avoid the interference of ore mud on the flotation process; S2. Preparation of tetraester Gemini surfactant: Take a dried reaction flask, add Bu2Sn(OMe)2 C, MeCN, 1,4-dioxane-2,5-hexanedione C4H4O4 A and isocyanate B, seal the vial with a sealing film, and place it in a microwave reactor; Stir the mixture under microwave radiation of 100 W for reaction, measure the reaction temperature with an IR sensor, and after the reaction, quench the mixture with H2O; Extract the aqueous phase with diethyl ether, quickly extract and separate each liquid phase, and dry and concentrate the combined extracts with sodium sulfate; Furthermore, a collector for lepidolite is provided. The collector for lepidolite comprises 40 - 75% of Gemini surfactant, 5 - 20% of foaming agent and 20 - 40% of solvent; Further, the foaming agent is one or more of pine oil, methyl isobutyl carbinol, AF-65, isobutyl methyl ether, sec-octanol, ether alcohol, etc., and the solvent is water, methanol, ethanol, n-butanol, etc.; S3. Pulp conditioning and reagent addition: Adjust the pulp concentration after grinding to 25% - 35% to suit the flotation conditions, and then sequentially add various flotation reagents such as tetraester Gemini surfactant, regulator and collector; S4. Flotation separation: Rougher flotation: Pass air into the flotation machine, and the lepidolite adsorbed by the collector floats with the bubbles to form a foam layer. After scraping, the rough concentrate is obtained, and the gangue minerals sink to the bottom of the cell as tailings; Cleaner flotation: The rough concentrate is reground and cleaned two to three times to further remove entrained impurities and improve the grade of lepidolite; Scavenger flotation: Conduct one to two scavenger flotation operations on the rougher flotation tailings to recover the residual lepidolite and reduce resource waste; S5. Product dehydration: Concentration: Dehydrate the flotation concentrate through a thickener to increase the pulp concentration to 50% - 60%; Filtration: Further dehydrate using a plate and frame filter press or a vacuum filter to obtain lepidolite concentrate with a moisture content of 15% - 20%; Drying: Dry the concentrate for subsequent metallurgical processing; S6. Wastewater treatment: Pass the wastewater generated in the flotation stage and the dehydration process into the wastewater treatment equipment. After the flotation wastewater is treated, it is preferentially recycled to the grinding process or flotation pulp conditioning to reduce the consumption of fresh water and lower the environmental protection cost.

[0032] In this embodiment, a tetraester-based Gemini surfactant is used in the flotation process to float lithium mica. The tetraester-based Gemini surfactant has better selectivity, stronger collecting ability and adaptability, lower reagent usage and low temperature resistance than a single amine collector. The ester group and the secondary amine group can produce a synergistic effect, increase the adsorption of the collector on the surface of the lithium mica mineral, improve the floatability and flotation efficiency of the lithium mica, and can obtain better flotation separation indicators than a single group collector, thereby improving the concentrate grade and recovery rate. The stability of the tetraester group improves the problem of amine collectors being sensitive to slurry temperature to a certain extent, and also reduces their sensitivity to ore slime. They can maintain a relatively stable flotation effect under different slurry 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, annealing is easier, the flotation foam is small and clear, which is beneficial to subsequent flotation operations and concentrate recovery.

[0033] Please refer to Figures 1 to 14 The working principle of the lithium mica flotation wastewater treatment equipment and flotation process provided by the present invention is as follows: Step S1, pre-treating the lithium ore, and then preparing a tetraester-based Gemini surfactant, adding various reagents to the slurry in sequence, flotation the slurry, dehydrating and drying the product after flotation, passing the wastewater generated in the flotation stage and the dehydration process into a regulating tank, and after the wastewater passes through the regulating tank to homogenize the water quality and water quantity, adjusting the pH value to 2.5-3.5, and then passing it into the reaction tank 1; Step S2, using the spraying mechanism 4 to put the ferrous sulfate solution into the wastewater in the reaction tank 1, and starting the driving motor 24, the driving motor 24 rotates to drive the rotating shaft 22 to rotate, the rotating shaft 22 rotates to drive the stirring paddle 23 to rotate, and the lithium mica metallurgical flotation wastewater is mixed with the ferrous sulfate solution through the rotation of the stirring paddle 23; Step S3, when the rotating shaft 22 rotates, it drives the driving gear 34 to rotate, the driving gear 34 rotates to drive the transmission gear 35 to rotate, the transmission gear 35 rotates to drive the bracket 36 to rotate, and when the bracket 36 rotates, it pulls the connecting frame 38 to rotate through the driving connecting rod 37, and the connecting frame 38 rotates to drive the middle rotating sleeve 32 to swing back and forth, and 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 swing back and forth, and the diluted H2O2 solution is sent to the first nozzle 33 by the drug dispensing main pipe 6 and the drug dispensing branch pipe 5, and the H2O2 solution is intermittently delivered at multiple points through the first nozzle 33; In step S4, when the rotating shaft 22 rotates, it will drive the rotating disc 71 to rotate simultaneously. The rotation of the rotating disc 71 drives the adjusting screw 72 and the rotating wheel 74 to rotate. When the bottom of the rotating wheel 74 contacts the convex platform 78, the mounting disc 75 and the floating bladder 77 will be pressed downward through the convex platform 78, and the floating bladder 77 will be pressed into the wastewater. When the bottom of the rotating wheel 74 disengages from the convex platform 78, the floating bladder 77 will float upward again under the buoyancy of the wastewater. By continuously driving the rotating wheel 74 to rotate through the rotating disc 71, the floating bladder 77 will fluctuate up and down in the wastewater, thereby causing waves in the flotation wastewater, increasing the reaction rate between the H2O2 solution and the ferrous sulfate solution, and using the generated strongly oxidizing hydroxyl radicals to destroy the hydrophobic chains and polar groups of the residual agents, effectively removing the residual agents in the wastewater. In step S5, the treated wastewater supernatant is transported to the neutralization sedimentation tank through the drain pipe 11, the pH value of the wastewater is adjusted, and sedimentation treatment is carried out. Then, the scraping motor 86 is started. The rotation of the scraping motor 86 drives the bidirectional threaded screw 82 to rotate. The rotation of the bidirectional threaded screw 82 drives two scrapers 84 to move back and forth through the connecting plate 83, scraping the sludge on the inner wall of the sludge collection box 81 downward. When the bidirectional threaded screw 82 rotates, it will drive the top pulley 93 to rotate simultaneously. 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 further drives the conveying auger 92 to rotate, and the sludge is discharged from the sludge collection box 81 through the rotation of the conveying auger 92. In step S6, the sludge is treated by sludge treatment equipment, and the treated wastewater enters the activated carbon adsorption tank or the biological treatment tank to further purify the water quality.

[0034] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A lepidolite flotation wastewater treatment device, characterized in that, It includes a reaction tank, a stirring mechanism, a swinging chemical dosing mechanism, and a spraying mechanism; The stirring mechanism includes a mounting frame fixedly arranged at the top of the reaction tank. A rotating shaft is vertically rotatably connected to the inner side of the mounting frame. Three stirring paddles are fixedly arranged on the surface of the rotating shaft. A driving motor for driving the rotation of the rotating shaft is arranged at the top of the mounting frame; The swinging chemical dosing mechanism includes three rotating seats fixedly arranged on the right side of the mounting frame. Rotating sleeves are rotatably connected to the surfaces of the three rotating seats. First nozzles are fixedly arranged on the surfaces of the three rotating sleeves through bolts. A driving gear is fixedly arranged on the surface of the top of the rotating shaft. A transmission gear is rotatably connected to the inner side of the mounting frame. The transmission gear meshes with the driving gear. A support is fixedly arranged at the top of the transmission gear. A driving connecting rod is rotatably connected to the surface of the support. A connecting frame is rotatably connected to the inner side of the right side of the driving connecting rod. The connecting frame is fixedly connected to the surface of the middle rotating sleeve. Two transmission connecting rods are rotatably connected to the surfaces of the three rotating sleeves; The spraying mechanism includes two spraying branch pipes fixedly arranged on the inner wall of the reaction tank. Second nozzles are communicated with the surfaces of the two spraying branch pipes. A spraying main pipe is communicated with the back surfaces of the two spraying branch pipes.

2. The lithium mica flotation wastewater treatment equipment according to claim 1, characterized in that, Chemical dosing branch pipes are fixedly arranged at the bottoms of the three rotating seats. A chemical dosing main pipe is communicated with the bottom of the chemical dosing branch pipe. The chemical dosing branch pipe is communicated with the first nozzle through a hose.

3. The lepidolite flotation wastewater treatment equipment according to claim 1, characterized in that A groove for cooperating with the driving connecting rod is arranged on the inner side of the mounting frame. When the transmission gear drives the support to rotate, the connecting frame and the middle rotating sleeve will be pulled to rotate through the driving connecting rod.

4. The lithium mica flotation wastewater treatment equipment according to claim 1, wherein A water wave generating mechanism is fixedly arranged on the surface of the rotating shaft. The water wave generating mechanism includes a rotating disc fixedly arranged on the surface of the rotating shaft. Three adjusting screws are threadedly connected to the inner side of the rotating disc. Rotating frames are fixedly arranged at the bottom ends of the three adjusting screws. Rotating wheels are rotatably connected to the inner sides of the three rotating frames. An installation disc is sleeved on the surface of the rotating shaft and at the bottom of the rotating disc. A plurality of installation plates are fixedly arranged at the bottom of the installation disc. Floating capsules are fixedly arranged on the inner sides of the plurality of installation plates. Three convex platforms are fixedly arranged at the top of the installation disc.

5. The lithium mica flotation wastewater treatment equipment according to claim 4, characterized in that Threaded grooves for cooperating with the adjusting screws are arranged on the inner side of the rotating disc, which can provide for the up-and-down rotation of the adjusting screws. Through grooves are arranged on the inner side of the installation disc.

6. The lithium mica flotation wastewater treatment equipment according to claim 1, characterized in that, A scraping mechanism is fixedly arranged at the bottom of the reaction tank. The scraping mechanism includes a sludge collecting box fixedly arranged at the bottom of the reaction tank. A bidirectional threaded screw rod is rotatably connected to the inner wall of the sludge collecting box. A connecting plate is threadedly connected to the surface of the bidirectional threaded screw rod. Scrapers are fixedly arranged on both sides of the connecting plate. A protective seat is fixedly arranged on the back surface of the sludge collecting box. A scraping motor for driving the rotation of the bidirectional threaded screw rod is arranged on the back surface of the protective seat.

7. The lithium mica flotation wastewater treatment equipment according to claim 6, characterized in that, A sewage discharging mechanism is fixedly arranged at the bottom of the sludge collecting box through bolts. The sewage discharging mechanism includes a sewage discharging pipe fixedly arranged at the bottom of the sludge collecting box through bolts. A conveying auger is rotatably connected to the inner side of the sewage discharging pipe. Pulley wheels are fixedly arranged at the rear ends of the conveying auger and the bidirectional threaded screw rod. A belt is sleeved on the surfaces of the two pulley wheels.

8. The lithium mica flotation wastewater treatment equipment according to claim 1, wherein, Two inlet pipes are connected to the left side of the reaction tank, two drain pipes are connected to the right side of the reaction tank, and a plurality of support legs are fixedly arranged at the bottom of the reaction tank.

9. A spodumene flotation process, characterized in that, It includes the lepidolite flotation wastewater treatment equipment described in any one of claims 1-8 and the following steps: S1. Ore pretreatment: After the raw ore is coarsely crushed, medium-crushed and finely crushed, the ore particle size is ground to less than 0.074 mm to ensure the dissociation of lepidolite monomers. The fine mud is separated by a hydrocyclone or a spiral classifier to avoid the interference of the ore mud in the flotation process. S2. Preparation of tetraester-based Gemini surfactant: Take a dried reaction flask, add Bu2Sn(OMe)2 C, MeCN, 1,4-dioxane-2,5-hexanedione C4H4O4 A and isocyanate B, seal the vial with a sealing film, and place it in a microwave reactor. Stir the mixture under microwave radiation of 100 W for reaction, measure the reaction temperature with an IR sensor, and after the reaction, quench the mixture with H2O. The aqueous phase is extracted with ether, the liquid phases of each layer are quickly extracted and separated, and the combined extracts are dried with sodium sulfate and concentrated. S3. Pulp preparation and reagent addition: Adjust the pulp concentration after grinding to 25% - 35% to suit the flotation conditions, and then add various flotation reagents such as tetraester-based Gemini surfactant, regulator and collector in sequence. S4. Flotation separation: Rougher flotation: Air is introduced into the flotation machine, and the lepidolite adsorbed by the collector floats with the bubbles to form a foam layer. After scraping, the rough concentrate is obtained, and the gangue minerals sink to the bottom of the cell as tailings. Cleaner flotation: The rough concentrate is reground and cleaned two to three times to further remove the entrained impurities and improve the grade of lepidolite. Scavenger flotation: The roughing tailings are scavenged one to two times to recover the residual lepidolite and reduce resource waste. S5. Product dehydration: Concentration: The concentrate after flotation is dehydrated by a thickener to increase the pulp concentration to 50% - 60%. Filtration: Further dehydration is carried out using a plate-and-frame filter press or a vacuum filter to obtain lepidolite concentrate with a moisture content of 15% - 20%. Drying: The concentrate is dried to facilitate subsequent metallurgical processing. S6. Wastewater treatment: The wastewater generated in the flotation stage and the dehydration process is fed into the wastewater treatment equipment. After the flotation wastewater is treated, it is preferentially reused in the grinding process or flotation pulp preparation to reduce the consumption of fresh water and the environmental protection cost.

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