A visual inspection device for flotation foam of lepidolite and a lepidolite flotation process

Abstract

This invention provides a visual inspection device and process for lithium mica flotation foam, relating to the field of visual inspection technology. The device includes a detection box, a moving detection mechanism, and an adjustment mechanism. The moving detection mechanism comprises a bidirectional threaded screw, a mounting bracket, and an industrial camera. The industrial camera is mounted vertically above the flotation cell on the inner side of the mounting bracket, used to capture images of the flotation foam from above. This solution ultimately achieves vertical movement of the screw block via the rotation of the bidirectional threaded screw. The working height of the industrial camera is adjusted using the moving bracket and mounting bracket. When the industrial camera moves upward to a certain height, the adjusting gear contacts the adjusting tooth plate. As it continues to move upward, the adjusting gear, through a rotating shaft, drives the mounting bracket and industrial camera to rotate. This allows the industrial camera to perform optical inspection of the flotation foam from other angles, overcoming the limitations of a vertical viewing angle and adapting to the three-dimensional characteristics of the foam and the complexity of the inspection scenario.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of visual detection, and in particular to a lithium mica flotation foam visual detection device and a lithium mica flotation process. BACKGROUND

[0002] In the lithium mica flotation process, after adding a collector, an industrial camera is used to visually detect the flotation foam. The industrial camera calculates the time from the formation to the rupture of the foam and the proportion of the foam on the surface of the flotation tank by continuous shooting, which can directly reflect the action state of the collector. Traditional manual sampling and testing of the grade of lithium mica or visual observation of the foam has obvious defects. Sampling and testing requires offline analysis, while the flotation process may fluctuate every minute due to changes in raw material composition and reagent concentration. When the indicators are found to be abnormal, the adjustment of the collector dosage or process parameters has been delayed, which may result in loss of lithium mica or reduction of product purity.

[0003] In related technologies, an industrial camera is used to visually detect the flotation foam during lithium mica flotation. However, the existing part of the visual detection device is inconvenient to assist in adjusting the angle of the industrial camera during operation. The industrial camera is mostly vertically installed on the top of the flotation tank, which is not conducive to breaking through the limitations of the vertical viewing angle and adapting to the three-dimensional characteristics of the foam and the complexity of the detection scene.

[0004] Therefore, it is necessary to provide a lithium mica flotation foam visual detection device to solve the above technical problems. SUMMARY

[0005] The present application provides a lithium mica flotation foam visual detection device, which solves the technical problem of the existing part of the visual detection device in related technologies, which is inconvenient to assist in adjusting the angle of the industrial camera during operation.

[0006] To solve the above technical problems, the lithium mica flotation foam visual detection device provided by the present application comprises a detection box, a mobile detection mechanism and an adjusting mechanism.

[0007] The mobile detection mechanism comprises a bidirectional threaded screw rod, a mounting bracket and an industrial camera. The industrial camera is arranged on the inner side of the mounting bracket and is vertically installed above the flotation tank for shooting the flotation foam image from top to bottom. The surface of the bidirectional threaded screw rod is connected with a screw block, and the front side of the screw block is fixedly provided with a moving frame.

[0008] The adjusting mechanism comprises a rotating shaft, two adjusting gears and two adjusting tooth plates. The rotating shaft is transversely connected to the inner side of the moving frame. The mounting bracket is fixedly connected with the rotating shaft. The two adjusting gears are fixedly arranged at the two ends of the rotating shaft. The two sides of the inner wall of the detection box are fixedly provided with protection frames. The two adjusting tooth plates are fixedly arranged on the inner sides of the two protection frames.

[0009] Preferably, the bidirectional screw thread screw is vertically rotatably connected to the inner side of the detection box, both sides of the inner wall of the detection box are fixedly provided with sliding rails, both sides of the moving frame are slidably connected with the sliding rails, and the top of the detection box is provided with a driving motor for driving the bidirectional screw thread screw to rotate.

[0010] Preferably, the inner side of each of the two protection frames is provided with a moving groove matched with the rotating shaft, and the two adjusting gears are located on the same vertical line and are in meshing state when the two adjusting gears move upward and contact with the two adjusting toothed plates respectively.

[0011] Preferably, the inner side of the detection box is rotatably connected with an illuminating mechanism, the illuminating mechanism comprises a mounting frame rotatably connected to the inner side of the detection box, a strip-shaped LED lamp is fixedly arranged on the inner side of the mounting frame, and a transmission gear is fixedly arranged on both sides of the mounting frame.

[0012] Preferably, the two sides of the detection box are fixedly provided with a protection mechanism, the protection mechanism comprises two mounting plates fixedly arranged on the two sides of the detection box, and a wind knife is rotatably connected to the opposite side of each of the two mounting plates, and an oscillating frame is fixedly arranged on both sides of the wind knife.

[0013] Preferably, a distance sensor is fixedly arranged on the bottom of the inner wall of the detection box and the top of the mounting support, the distance sensor is used for monitoring the height of the upward movement of the mounting support, when the mounting support moves upward by a certain height and the angle of the industrial camera changes, the distance sensor transmits the height data to the controller, and the controller controls the extension distance of the electric telescopic rod, so that the working angle of the wind knife is adapted to the working angle of the industrial camera.

[0014] Preferably, the bottom end of the bidirectional screw thread screw is fixedly provided with a cleaning mechanism, the cleaning mechanism comprises a rotating disc fixedly arranged on the bottom end of the bidirectional screw thread screw, a connecting rod is rotatably connected to the bottom of the rotating disc, a rotating shaft is rotatably connected to the bottom of the detection box, a cleaning brush plate is fixedly arranged on the surface of the rotating shaft, a driving plate is fixedly arranged on the bottom end of the rotating shaft, and the driving plate is rotatably connected with the connecting rod.

[0015] Preferably, the bottom of the detection box is provided with a detection frame, a connecting support is fixedly arranged on the surface of the detection frame, an infrared sensor is arranged on the inner side of the connecting support, and an arc-shaped protection plate is arranged on the inner side of the detection frame.

[0016] A lithium mica flotation process, comprising the following steps:

[0017] Step S1, preparation of a collector:

[0018] L-glutamate (3.37 g, 10 mmol) and N,N-dimethylformamide di-tert-butyl acetal (55 mL, 54 mmol) were mixed in anhydrous benzene (25 mL), heated under reflux overnight in Ar, and H2O was added after the reaction. The mixture was extracted with AcOEt, the organic solution was washed with saturated brine, dried over K2CO3, and rotary evaporated under reduced pressure. The residue was subjected to column chromatography with AcOEt-hexane (1:8) to give A, a colorless oil (3.05 g, 75%).

[0019] A was dissolved in an ethanol solution and hydrogenated on 10% Pd-C. After the reaction was completed, the catalyst was filtered off using a diatomaceous earth pad, and the filtrate was evaporated to obtain a pale yellow oily substance B, which was then solidified in a refrigerator.

[0020] At 0°C, NET3, THF, and ethyl chloroformate were added to B. The mixture was stirred at 0°C for 30-120 min. The insoluble substances were filtered out. NaBH4, THF, and H2O were added to the filtrate under ice cooling, and the mixture was stirred at room temperature for 5 hours to obtain a pale yellow oily substance C (2.23 g, 70%).

[0021] Under icy conditions, pyridine, CHCl3 and methanesulfonyl chloride were added to C and stirred at room temperature for 2.5 h. After the solvent evaporated, the residue was extracted with AcOEt and H2O. The solution was washed sequentially with saturated aqueous solution, saturated copper sulfate and saturated brine. The solution was dried on K2CO3 and evaporated to obtain D, which is a colorless oily substance.

[0022] Cyanomethylbenzenesulfinate was added to a mixture of NaH and THF and stirred at room temperature for 1.5 h. A THF solution of E was slowly added dropwise to the mixture and stirred at 70 °C. The product after the reaction was extracted with AcOEt and H2O. The organic solution was washed with H2O and brine, dried (MgSO4) and evaporated to obtain E, which is a colorless oil.

[0023] The mixture of E and 5% Na-Hg in a mixed solution of THF and MeOH was stirred at room temperature, filtered to remove inorganic substances, the filtrate was evaporated, and the residue was subjected to column chromatography with AcOEt-hexane (1:3) to obtain a colorless oily substance F;

[0024] HCl and NaHCO3 were added to a mixture of F with ethanol, H2O and NH2OH. The reaction mixture was stirred at 50 °C for 3 days and then at 70 °C for 2 days. The reaction mixture was partitioned with AcOEt and H2O. The organic solution was washed with H2O and brine to obtain G, which is a colorless oily substance.

[0025] The protected G was dissolved in dioxane protected with saturated dry HCl gas, stirred at room temperature for 1 h and then abandoned for 2 h, and then dried under Ar flow to obtain the colorless viscous oily target product H.

[0026] Step S2, Lithium mica flotation:

[0027] The lepidolite ore is placed in a ball mill, ground, and the slurry is collected. The collected slurry is then passed through a magnetic separator to remove magnetic minerals and obtain magnetic concentrate.

[0028] The magnetically separated concentrate is poured into a flotation cell, and inhibitors, collectors and frothers are added. After roughing, cleaning and scavenging, it is filtered and dried to finally obtain lepidolite concentrate.

[0029] Step S3, Flotation Foam Detection:

[0030] Industrial cameras were used to photograph lithium mica flotation foam, and software was used to process the images to extract core visual features related to the flotation process. The visual features of the flotation foam are intrinsically related to the core indicators of the flotation process, and the process status can be inferred by analyzing these features.

[0031] Compared with related technologies, the lithium mica flotation foam visual inspection device provided by the present invention has the following beneficial effects:

[0032] The screw block can be moved up and down by rotating the bidirectional screw. The working height of the industrial camera can be adjusted by using the moving frame and mounting bracket. When the industrial camera moves up to a certain height, the adjusting gear contacts the adjusting tooth plate and continues to move upward. The adjusting gear drives the mounting bracket and industrial camera to rotate through the rotating shaft. This allows the industrial camera to perform optical inspection of flotation foam from other angles, which helps to overcome the limitations of the vertical viewing angle and adapt to the three-dimensional characteristics of foam and the complexity of the inspection scene. By moving the industrial camera up and down, it can be adapted to foam layers of different thicknesses. By changing the shooting angle of the industrial camera, the side and edge areas of the foam layer can be covered, supplementing the information blind spots of a single angle. At the same time, by adjusting the angle of the industrial camera, the reflection direction of direct light source can be avoided, making the color difference of the foam clearer. In addition, the height adjustment can also avoid the obstruction of the tank edge and the stirring device, ensuring that the shooting area is centered on the foam layer. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 The optimal structural schematic diagram provided for this invention;

[0035] Figure 2 This is a structural schematic diagram of the bottom view of the detection box provided by the present invention;

[0036] Figure 3 This is a schematic diagram of the structure of the mobile detection mechanism and the adjustment mechanism provided by the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the mounting bracket provided by the present invention;

[0038] Figure 5 The diagram shows the state in which the screw block drives the moving frame to move upward, and after the adjusting gear contacts the adjusting tooth plate, the mounting bracket drives the industrial camera to rotate.

[0039] Figure 6 A schematic diagram of the lighting mechanism provided by the present invention;

[0040] Figure 7 A schematic diagram showing the state in which the movable frame provided by the present invention drives the drive gear plate to move upward, causing the transmission gear to drive the mounting frame and the strip LED light to rotate.

[0041] Figure 8 A schematic diagram of the protective mechanism provided by the present invention;

[0042] Figure 9 A schematic diagram showing the state in which the electric telescopic rod provided by the present invention extends and, under the action of the adjusting frame, causes the swing frame to drive the air knife to rotate.

[0043] Figure 10 A schematic diagram of the cleaning mechanism provided by the present invention;

[0044] Figure 11 This is a schematic diagram of the structure of the detection frame provided by the present invention;

[0045] Figure 12 The chemical formula of the collector provided by this invention.

[0046] Explanation of icon numbers:

[0047] 1. Testing box;

[0048] 2. Mobile detection mechanism; 21. Bidirectional threaded screw; 22. Mounting bracket; 23. Industrial camera; 24. Screw block; 25. Moving frame; 26. Slide rail; 27. Drive motor;

[0049] 3. Adjustment mechanism; 31. Rotating shaft; 32. Adjusting gear; 33. Adjusting toothed plate; 34. Protective frame; 35. Moving groove;

[0050] 4. Lighting mechanism; 41. Mounting bracket; 42. Strip LED light; 43. Transmission gear; 44. Drive gear plate;

[0051] 5. Protective mechanism; 51. Mounting plate; 52. Air knife; 53. Swing frame; 54. Electric telescopic rod; 55. Adjustment frame;

[0052] 6. Distance sensor;

[0053] 7. Cleaning mechanism; 71. Rotary disc; 72. Connecting rod; 73. Rotating shaft; 74. Cleaning brush plate; 75. Drive plate;

[0054] 8. Detection frame; 9. Connecting bracket; 10. Infrared sensor; 11. Curved protective plate.

[0055] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0057] This invention provides a visual inspection device for lithium mica flotation foam and a lithium mica flotation process.

[0058] First embodiment:

[0059] Please see Figures 1 to 5 A visual inspection device for lithium mica flotation foam includes an inspection box 1, a moving inspection mechanism 2, and an adjustment mechanism 3;

[0060] The mobile detection mechanism 2 includes a bidirectional threaded screw 21, a mounting bracket 22, and an industrial camera 23. The industrial camera 23 is located inside the mounting bracket 22 and is vertically mounted above the flotation cell for taking images of flotation foam from above. The surface of the bidirectional threaded screw 21 is threaded with a screw block 24, and a movable frame 25 is fixed to the front side of the screw block 24.

[0061] The bidirectional threaded screw 21 is vertically rotatably connected to the inner side of the test box 1. Slide rails 26 are fixed on both sides of the inner wall of the test box 1. The two sides of the movable frame 25 are slidably connected to the slide rails 26. A drive motor 27 for driving the bidirectional threaded screw 21 to rotate is provided on the top of the test box 1.

[0062] Please combineFigure 3 and Figure 4 : Start the drive motor 27. The drive motor 27 rotates and drives the bidirectional threaded screw 21 to rotate. The bidirectional threaded screw 21 rotates and drives the screw block 24 to move upward. The screw block 24 moves upward and drives the moving frame 25 to slide upward on the surface of the slide rail 26. The moving frame 25 moves and then drives the mounting bracket 22 and the industrial camera 23 to move upward through the rotating shaft 31, thereby adjusting the height position of the industrial camera 23 upward.

[0063] Furthermore, the drive motor 27 is started, and the rotation of the drive motor 27 drives the bidirectional threaded screw 21 to reverse. The bidirectional threaded screw 21 then drives the screw block 24 and the moving frame 25 to move downward. The downward movement of the moving frame 25 drives the mounting bracket 22 and the industrial camera 23 to move downward through the rotating shaft 31, thereby adjusting the height position of the industrial camera 23 downward.

[0064] Preferably, the bottom of the testing box 1 is made of transparent acrylic material;

[0065] The adjustment mechanism 3 includes a rotating shaft 31, two adjusting gears 32 and two adjusting gear plates 33. The rotating shaft 31 is laterally rotatably connected to the inner side of the movable frame 25. The mounting bracket 22 is fixedly connected to the rotating shaft 31. The two adjusting gears 32 are respectively fixed at both ends of the rotating shaft 31. Protective frames 34 are fixed on both sides of the inner wall of the detection box 1. The two adjusting gear plates 33 are respectively fixed on the inner side of the two protective frames 34.

[0066] The inner sides of the two protective frames 34 are provided with moving grooves 35 that cooperate with the rotating shaft 31. The two adjusting gears 32 are respectively on the same vertical line as the two adjusting tooth plates 33. When the two adjusting gears 32 move upward, they will contact the two adjusting tooth plates 33 respectively and form a meshing state.

[0067] Please combine Figures 3 to 5 When the mounting bracket 22 and the industrial camera 23 move upward, they will simultaneously drive the two adjusting gears 32 to move upward. After the adjusting gears 32 come into contact with the adjusting tooth plate 33, under the action of the adjusting tooth plate 33, the adjusting gears 32 drive the mounting bracket 22 and the industrial camera 23 to rotate through the rotating shaft 31, thereby adjusting the working angle of the industrial camera 23, so that the industrial camera 23 can perform optical detection of flotation foam from other angles.

[0068] In this embodiment, the rotation of the bidirectional threaded screw 21 drives the screw block 24 to move up and down. The working height of the industrial camera 23 is adjusted using the moving frame 25 and the mounting bracket 22. When the industrial camera 23 moves upward to a certain height, the adjusting gear 32 contacts the adjusting tooth plate 33 and continues to move upward. The adjusting gear 32 drives the mounting bracket 22 and the industrial camera 23 to rotate through the rotating shaft 31. This allows the industrial camera 23 to perform optical detection of flotation foam from other angles, which helps to overcome the limitations of the vertical viewing angle and adapt to the three-dimensional characteristics of foam and the complexity of the detection scene. By moving the industrial camera 23 up and down, it can be adapted to foam layers of different thicknesses. By changing the shooting angle of the industrial camera 23, the side and edge areas of the foam layer can be covered, supplementing the information blind spots of a single angle. At the same time, by adjusting the angle of the industrial camera 23, the reflection direction of the direct light source can be avoided, making the color difference of the foam clearer. In addition, the height adjustment can also avoid the obstruction of the tank edge and the stirring device, ensuring that the shooting area is centered on the foam layer.

[0069] Second embodiment:

[0070] Please see Figure 1 , Figures 6 to 9 The inner side of the detection box 1 is rotatably connected to a lighting mechanism 4. The lighting mechanism 4 includes a mounting frame 41 rotatably connected to the inner side of the detection box 1. A strip LED light 42 is fixedly mounted on the inner side of the mounting frame 41. Transmission gears 43 are fixedly mounted on both sides of the mounting frame 41. Two drive gear plates 44 are fixedly mounted on the bottom of the movable frame 25.

[0071] Please combine Figure 6 and Figure 7 When the moving frame 25 moves upward, it will simultaneously drive the two drive gear plates 44 to move upward. After the moving frame 25 moves upward to a certain height, when the drive gear plate 44 contacts the transmission gear 43, it will drive the transmission gear 43 to rotate (at this time, the mounting bracket 22 and the industrial camera 23 also rotate). The rotation of the transmission gear 43 will drive the mounting bracket 41 and the strip LED light 42 to rotate, thereby providing supplementary lighting for the shooting position of the industrial camera 23.

[0072] The detection box 1 is provided with protective mechanisms 5 on both sides. The protective mechanisms 5 include mounting plates 51 fixed on both sides of the detection box 1. Air blades 52 are rotatably connected to the opposite side of the two mounting plates 51. Swing frames 53 are fixed on both sides of the air blades 52. Electric telescopic rods 54 are fixed on both sides of the inner wall of the detection box 1. Adjustment frames 55 are fixed at the output ends of the two electric telescopic rods 54. The inner side of the adjustment frame 55 is provided with a movable groove that cooperates with the swing frame 53.

[0073] Distance sensor 6 is fixedly installed at the bottom of the inner wall of the detection box 1 and the top of the mounting bracket 22. The distance sensor 6 is used to monitor the height of the mounting bracket 22 moving upward. When the mounting bracket 22 moves upward to a certain height and the angle of the industrial camera 23 changes, the distance sensor 6 transmits the height data to the controller. The controller controls the extension distance of the electric telescopic rod 54 so that the working angle of the air knife 52 matches the working angle of the industrial camera 23.

[0074] Please combine Figure 8 and Figure 9 When the mounting bracket 22 moves upward to a certain height (just as the mounting bracket 22 and the industrial camera 23 begin to rotate), the distance sensor 6 transmits data to the controller. The controller calculates the angle relationship and then controls the electric telescopic rod 54 to extend. The extension of the electric telescopic rod 54 drives the adjusting frame 55 to move forward, thereby causing the swing frame 53 to drive the air knife 52 to rotate. This ensures that the blowing position of the air knife 52 is precisely matched with the shooting requirements of the industrial camera 23. Through the setting of the air knife 52, clean air is blown out to form a barrier, preventing splashing mineral slurry droplets from approaching the lens.

[0075] Preferably, the air knife 52 is connected to an external air source device.

[0076] In this embodiment, when the angle of the industrial camera 23 is adjusted, the strip LED light 42 rotates synchronously with the transmission gear 43, and the direction of the supplementary light is consistent with the working field of view of the industrial camera 23. This can illuminate the foam area currently focused by the industrial camera 23, avoiding local underexposure or overexposure caused by light angle deviation. The directional light can penetrate the slight moisture more efficiently, reducing image blur caused by light scattering. Especially after the angle of the industrial camera 23 is changed, it ensures that the supplementary light is always focused on the detection target, maintaining image stability.

[0077] The distance sensor 6 detects the moving height of the mounting bracket 22, and the controller calculates the angle relationship. Based on the angle of the industrial camera 23, the working angle of the air knife 52 is adjusted to ensure that the air barrier always covers the area between the lens and the foam area, avoiding blind spots in protection. There is no need to manually adjust the working angle of the air knife 52, which improves the adaptability of the testing equipment to complex working conditions.

[0078] Third embodiment:

[0079] Please see Figure 10 and Figure 11The bottom end of the bidirectional threaded screw 21 is fixedly provided with a cleaning mechanism 7. The cleaning mechanism 7 includes a rotating disk 71 fixedly provided at the bottom end of the bidirectional threaded screw 21. The bottom of the rotating disk 71 is rotatably connected to a connecting rod 72. The bottom of the detection box 1 is rotatably connected to a rotating shaft 73. A cleaning brush plate 74 is fixedly provided on the surface of the rotating shaft 73. A drive plate 75 is fixedly provided at the bottom end of the rotating shaft 73. The drive plate 75 is rotatably connected to the connecting rod 72.

[0080] Please combine Figure 10 When the bidirectional threaded screw 21 rotates, it will simultaneously drive the rotating disk 71 to rotate. The rotation of the rotating disk 71, through the cooperation of the connecting rod 72, the rotating shaft 73 and the drive plate 75, causes the cleaning brush plate 74 to swing, thereby cleaning the bottom of the transparent acrylic plate and preventing stains from affecting the shooting work of the industrial camera 23.

[0081] Preferably, the connection point between the rotating disk 71 and the connecting rod 72 is far from the center of the rotating disk 71;

[0082] The bottom of the detection box 1 is provided with a detection frame 8, the surface of the detection frame 8 is fixed with a connecting bracket 9, the inner side of the connecting bracket 9 is provided with an infrared sensor 10, and the inner side of the detection frame 8 is provided with an arc-shaped protective plate 11.

[0083] Preferably, the curved protective plate 11 is made of transparent acrylic material, and the curvature is adapted to the foam splash trajectory. The infrared sensor 10 is used to detect the temperature of the flotation foam. When combined with the visual information captured by the industrial camera 23, it can improve the comprehensive understanding of the flotation foam state.

[0084] In this embodiment, when the working height or angle of the industrial camera 23 is adjusted by the bidirectional threaded screw 21, the bidirectional threaded screw 21 will simultaneously drive the rotating disk 71 to rotate. The rotation of the rotating disk 71, through the cooperation of the connecting rod 72, the rotating shaft 73 and the drive plate 75, causes the cleaning brush plate 74 to oscillate back and forth, thereby cleaning the bottom of the detection box 1, ensuring that the acrylic plate always maintains high light transmittance, so that the industrial camera 23 can clearly capture the detailed features of the foam, and provide high-quality original images for subsequent parameter analysis.

[0085] Fourth embodiment:

[0086] Please see Figure 12 A lithium mica flotation process includes the following steps:

[0087] Step S1: Preparation of the collector:

[0088] L-glutamate (3.37 g, 10 mmol) and N,N-dimethylformamide di-tert-butyl acetal (55 mL, 54 mmol) were mixed in anhydrous benzene (25 mL), heated under reflux overnight in Ar, and H2O was added after the reaction. The mixture was extracted with AcOEt, the organic solution was washed with saturated brine, dried over K2CO3, and rotary evaporated under reduced pressure. The residue was subjected to column chromatography with AcOEt-hexane (1:8) to give A, a colorless oil (3.05 g, 75%).

[0089] A was dissolved in an ethanol solution and hydrogenated on 10% Pd-C. After the reaction was completed, the catalyst was filtered off using a diatomaceous earth pad, and the filtrate was evaporated to obtain a pale yellow oily substance B, which was then solidified in a refrigerator.

[0090] At 0°C, NET3, THF, and ethyl chloroformate were added to B. The mixture was stirred at 0°C for 30-120 min. The insoluble substances were filtered out. NaBH4, THF, and H2O were added to the filtrate under ice cooling, and the mixture was stirred at room temperature for 5 hours to obtain a pale yellow oily substance C (2.23 g, 70%).

[0091] Under icy conditions, pyridine, CHCl3 and methanesulfonyl chloride were added to C and stirred at room temperature for 2.5 h. After the solvent evaporated, the residue was extracted with AcOEt and H2O. The solution was washed sequentially with saturated aqueous solution, saturated copper sulfate and saturated brine. The solution was dried on K2CO3 and evaporated to obtain D, which is a colorless oily substance.

[0092] Cyanomethylbenzenesulfinate was added to a mixture of NaH and THF and stirred at room temperature for 1.5 h. A THF solution of E was slowly added dropwise to the mixture and stirred at 70 °C. The product after the reaction was extracted with AcOEt and H2O. The organic solution was washed with H2O and brine, dried (MgSO4) and evaporated to obtain E, which is a colorless oil.

[0093] The mixture of E and 5% Na-Hg in a mixed solution of THF and MeOH was stirred at room temperature, filtered to remove inorganic substances, the filtrate was evaporated, and the residue was subjected to column chromatography with AcOEt-hexane (1:3) to obtain a colorless oily substance F;

[0094] HCl and NaHCO3 were added to a mixture of F with ethanol, H2O and NH2OH. The reaction mixture was stirred at 50 °C for 3 days and then at 70 °C for 2 days. The reaction mixture was partitioned with AcOEt and H2O. The organic solution was washed with H2O and brine to obtain G, which is a colorless oily substance.

[0095] The protected G was dissolved in dioxane protected with saturated dry HCl gas, stirred at room temperature for 1 h and then abandoned for 2 h, and then dried under Ar flow to obtain the colorless viscous oily target product H.

[0096] Furthermore, a novel mixed collector is provided, comprising 30-60% of the above-mentioned collector compound, 10-20% of a cationic collector, 1-3% of a pH adjuster, 1-10% of an antioxidant, and 10-50% of a solvent.

[0097] Preferably, the cationic collector includes one or more of dodecylamine, tetradecylamine, hexadecylamine, cocoamine, and dodecyltrimethylammonium chloride;

[0098] Preferably, the pH adjuster includes one or more of sulfuric acid, sodium carbonate, sodium hydroxide, and triethanolamine;

[0099] Preferably, the antioxidant includes one or more of hydroquinone, tert-butylhydroquinone, glycerol, surfactants, and fatty acids;

[0100] Preferably, the solvent includes water or alcohol;

[0101] Step S2, Lithium mica flotation:

[0102] The lepidolite ore is placed in a ball mill, ground, and the slurry is collected. The collected slurry is then passed through a magnetic separator to remove magnetic minerals and obtain magnetic concentrate.

[0103] The magnetically separated concentrate is poured into a flotation cell, and inhibitors, collectors and frothers are added. After roughing, cleaning and scavenging, it is filtered and dried to finally obtain lepidolite concentrate.

[0104] Step S3, Flotation Foam Detection:

[0105] An industrial camera 23 was used to photograph the lithium mica flotation foam. The images were processed using a software system to extract the core visual features related to the flotation process. The visual features of the flotation foam are intrinsically related to the core indicators of the flotation process. By analyzing these features, the process status can be inferred.

[0106] In this embodiment, the structural advantages of amide oxime are mainly utilized. The conjugated system formed by the carbonyl group (C=O) and amino group (-NH2) in the amide group endows the molecule with a certain degree of stability. At the same time, the lone pair electrons on the nitrogen atom can coordinate with metal ions on the surface of lepidolite, increasing the selectivity of adsorption. The C=N double bond and hydroxyl group (-OH) in the oxime group can form chemical adsorption with the active sites on the surface of lepidolite. In particular, the oxime group has a specific chelating ability for certain metal ions and can preferentially bind with metal ions such as lithium in lepidolite, which greatly improves the selective adsorption of the collector on lepidolite, making lepidolite better distinguished from gangue minerals and significantly improving the flotation effect. The added carboxyl group has strong hydrophilicity and can form hydrogen bonds with water molecules, which helps the collector disperse in the pulp. Moreover, its acidity can react with the alkaline sites on the surface of lepidolite to a certain extent, enhancing the adsorption effect.

[0107] Please refer to the reference again. Figures 1 to 11 The working principle of the lithium mica flotation foam visual inspection device provided by the present invention is as follows:

[0108] Step S1: Install the equipment above the flotation cell using the detection frame 8, then start the drive motor 27. The drive motor 27 rotates, causing the bidirectional threaded screw 21 to rotate. The bidirectional threaded screw 21 rotates, causing the screw block 24 to move upward. The upward movement of the screw block 24 causes the moving frame 25 to slide upward on the surface of the slide rail 26. The movement of the moving frame 25 then drives the mounting bracket 22 and the industrial camera 23 to move upward through the rotating shaft 31, thereby adjusting the height position of the industrial camera 23 upward.

[0109] When the drive motor 27 reverses, it will drive the bidirectional screw 21 to reverse. The bidirectional screw 21 will then drive the screw block 24 and the moving frame 25 to move downward. The downward movement of the moving frame 25 will drive the mounting bracket 22 and the industrial camera 23 to move downward through the rotating shaft 31, thereby adjusting the height position of the industrial camera 23 downward.

[0110] In step S2, when the bidirectional threaded screw 21 rotates, it will simultaneously drive the rotating disk 71 to rotate. The rotation of the rotating disk 71, through the cooperation of the connecting rod 72, the rotating shaft 73 and the drive plate 75, causes the cleaning brush plate 74 to swing back and forth, thereby cleaning the transparent acrylic material at the bottom of the detection box 1 and preventing the stains from affecting the shooting work of the industrial camera 23.

[0111] In step S3, when the mounting bracket 22 and the industrial camera 23 move upward, they will simultaneously drive the two adjusting gears 32 to move upward. After the adjusting gears 32 come into contact with the adjusting tooth plate 33, under the action of the adjusting tooth plate 33, the adjusting gears 32 will drive the mounting bracket 22 and the industrial camera 23 to rotate through the rotating shaft 31, thereby adjusting the working angle according to the shooting requirements of the industrial camera 23.

[0112] In step S4, in conjunction with step S3, when the mounting bracket 22 moves upward, the moving frame 25 will also simultaneously drive the two drive gear plates 44 to move upward. After the moving frame 25 moves upward to a certain height, when the drive gear plate 44 contacts the transmission gear 43, it will drive the transmission gear 43 to rotate. The rotation of the transmission gear 43 will drive the mounting bracket 41 and the strip LED light 42 to rotate, thereby synchronously adjusting the supplementary lighting position of the strip LED light 42 according to the rotation angle of the industrial camera 23.

[0113] In step S5, combined with step S3, after the mounting bracket 22 moves upward and reaches a certain height, the distance sensor 6 transmits the movement data of the mounting bracket 22 to the controller. The controller calculates the angle relationship and then controls the electric telescopic rod 54 to extend. The extension of the electric telescopic rod 54 drives the adjusting frame 55 to move forward, causing the swing frame 53 to drive the air knife 52 to rotate, ensuring that the blowing position of the air knife 52 is precisely matched with the shooting requirements of the industrial camera 23. Through the setting of the air knife 52, clean air is blown out to form a barrier, preventing splashed mineral slurry droplets from approaching the lens.

[0114] 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 under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A lithium mica flotation process, characterized by, The method comprises the following steps: Step S1, preparing a collector: 3.37 g, 10 mmol L-glutamate and 55 mL, 54 mmol N, N-dimethylformamide di-t-butyl acetal are mixed in 25 mL of anhydrous benzene, heated to reflux under Ar overnight, after the reaction, H2O is added, and the mixture is extracted with AcOEt, the organic solution is washed with saturated brine, dried over K2CO3, and evaporated under reduced pressure, and column chromatography is performed on the residue with AcOEt-hexane in a volume ratio of 1:8 to obtain A as 3.05 g of colorless oil; A is dissolved in an ethanol solution, hydrogenated on 10% Pd-C, after the reaction, the catalyst is filtered off using a diatomite pad, and the filtrate is evaporated to obtain B as a light yellow oil, which is finally solidified in a refrigerator; NEt3, THF, and ethyl chloroformate are added to B at 0°C, the mixture is stirred at 0°C for 30-120 min, the insoluble substance is filtered off, the filtrate is added with NaBH4, THF, and H2O under ice cooling, and stirred at room temperature for 5 hours to obtain 2.23 g of light yellow oil C; Pyridine, CHCl3, and methanesulfonyl chloride are added to C under ice cooling, and stirred at room temperature for 2.5 h, after evaporation of the solvent, the residue is extracted with AcOEt and H2O, the solution is sequentially washed with saturated aqueous solution, saturated copper sulfate, and saturated brine, dried over K2CO3, and evaporated to obtain D as colorless oil; Cyanomethyl phenyl sulfinate is added to a mixture of NaH and THF, and stirred at room temperature for 1.5 h, a THF solution of D is slowly added dropwise to the mixture, and stirred at 70°C, the product after the reaction is extracted with AcOEt and H2O, the organic solution is washed with H2O and brine, dried over MgSO4, and evaporated to obtain E as colorless oil; A mixture of E and 5% Na-Hg in a mixed solution of THF and MeOH is stirred at room temperature, after the inorganic substance is filtered off, the filtrate is evaporated, and column chromatography is performed on the residue with AcOEt-hexane in a volume ratio of 1:3 to obtain F as colorless oil; HCl and NaHCO3 are added to a mixture of F, ethanol, H2O, and NH2OH, the reaction is stirred at 50°C for 3 days, and then stirred at 70°C for 2 days, the reaction mixture is partitioned with AcOEt and H2O, the organic solution is washed with H2O and brine to obtain G as colorless oil; The protected G is dissolved in dioxane protected by saturated dry HCl gas, and stirred at room temperature for 1 h, abandoned for 2 h, and then dried under Ar flow to obtain the target product H as colorless viscous oil; Step S2, lithium mica flotation: The lithium mica ore is placed in a ball mill, ground, and the slurry is collected, and the collected slurry is removed from magnetic minerals by a magnetic separator to obtain a magnetic separation concentrate; The concentrate after the magnetic separation is poured into a flotation tank, and an inhibitor, a collector, and a foaming agent are added, after roughing, cleaning, and scavenging, filtration and drying are performed, and finally a lithium mica concentrate is obtained; Step S3, flotation froth detection: An industrial camera is used to shoot the lithium mica flotation froth, and a software system is used to process the image and extract core visual features related to the flotation process. The visual features of the flotation froth are internally related to the core indicators of the flotation process. By analyzing these features, the process state can be inferred. The lithium mica flotation process uses the following lithium mica flotation froth visual detection equipment, which includes a detection box, a mobile detection mechanism, and an adjustment mechanism. The mobile detection mechanism includes a two-way threaded screw rod, a mounting bracket, and an industrial camera. The industrial camera is arranged on the inner side of the mounting bracket and is vertically installed above the flotation tank for shooting the flotation froth image from top to bottom. The surface of the two-way threaded screw rod is connected with a screw block, and the front side of the screw block is fixedly provided with a moving frame. The adjustment mechanism includes a rotating shaft, two adjustment gears, and two adjustment tooth plates. The rotating shaft is transversely connected to the inner side of the moving frame, and the mounting bracket is fixedly connected to the rotating shaft. Two adjustment gears are fixedly arranged at both ends of the rotating shaft. Two protection frames are fixedly arranged on the inner sides of the two protection frames.

2. The lithium mica flotation process according to claim 1, characterized in that, The two-way threaded screw rod is vertically connected to the inner side of the detection box. The inner sides of the two sides of the detection box are fixedly provided with sliding rails. The two sides of the moving frame are slidingly connected with the sliding rails. The top of the detection box is provided with a driving motor for driving the two-way threaded screw rod to rotate.

3. The lithium mica flotation process according to claim 1, characterized in that, The inner sides of the two protection frames are provided with a moving groove matched with the rotating shaft. The two adjustment gears are on the same vertical line with the two adjustment tooth plates. When the two adjustment gears move upward, they will contact and mesh with the two adjustment tooth plates.

4. The lithium mica flotation process according to claim 1, characterized in that, The inner side of the detection box is rotatably connected with an illumination mechanism. The illumination mechanism includes a mounting bracket rotatably connected to the inner side of the detection box. A strip-shaped LED lamp is fixedly arranged on the inner side of the mounting bracket. Two transmission gears are fixedly arranged on the two sides of the mounting bracket. Two driving tooth plates are fixedly arranged on the bottom of the moving frame.

5. The lithium mica flotation process according to claim 1, characterized in that, The two sides of the detection box are fixedly provided with a protection mechanism. The protection mechanism includes two mounting plates fixedly arranged on the two sides of the detection box. A wind knife is rotatably connected to the opposite side of the two mounting plates. Two swing frames are fixedly arranged on the two sides of the wind knife. Two electric telescopic rods are fixedly arranged on the inner sides of the two sides of the detection box. Two adjustment frames are fixedly arranged on the output ends of the two electric telescopic rods. An activity groove matched with the swing frame is arranged on the inner side of the adjustment frame.

6. The lithium mica flotation process according to claim 5, characterized in that, A distance sensor is fixedly arranged on the bottom of the inner wall of the detection box and the top of the mounting bracket. The distance sensor is used to monitor the height of the upward movement of the mounting bracket. When the mounting bracket moves upward to a certain height and the angle of the industrial camera changes, the distance sensor transmits the height data to the controller. The controller controls the extension distance of the electric telescopic rod to make the working angle of the wind knife compatible with the working angle of the industrial camera.

7. The lithium mica flotation process according to claim 1, characterized in that, The bottom end of the bidirectional threaded screw rod is fixedly provided with a cleaning mechanism, the cleaning mechanism comprises a rotating disc fixedly provided at the bottom end of the bidirectional threaded screw rod, a connecting rod is rotatably connected to the bottom of the rotating disc, a rotating shaft is rotatably connected to the bottom of the detection box, a cleaning brush plate is fixedly provided on the surface of the rotating shaft, and a driving plate is fixedly provided at the bottom end of the rotating shaft and rotatably connected with the connecting rod.

8. The lithium mica flotation process according to claim 1, characterized in that, The bottom of the detection box is provided with a detection frame, a connecting support is fixedly provided on the surface of the detection frame, an infrared sensor is arranged on the inner side of the connecting support, and an arc-shaped protective plate is arranged on the inner side of the detection frame.

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