Lepidolite flotation froth visual inspection equipment and lepidolite flotation process

Abstract

The invention provides lepidolite flotation froth visual inspection equipment and a lepidolite flotation process, and relates to the technical field of visual inspection, the lepidolite flotation froth visual inspection equipment comprises a detection box, a mobile detection mechanism and an adjusting mechanism; the mobile detection mechanism comprises a bidirectional threaded lead screw, a mounting bracket and an industrial camera, and the industrial camera is arranged on the inner side of the mounting bracket, is vertically mounted above the flotation tank and is used for shooting flotation froth images from top to bottom. According to the scheme, the screw block can be driven to move up and down through rotation of the two-way threaded lead screw, the working height of the industrial camera is adjusted through the movable frame and the mounting support, and when the industrial camera moves upwards to a certain height, the adjusting gear makes contact with the adjusting toothed plate and continuously moves upwards, the adjusting gear is driven to rotate. The adjusting gear drives the mounting bracket and the industrial camera to rotate through the rotating shaft, so that the industrial camera can perform optical detection on the flotation froth from other angles, the limitation of a vertical visual angle can be broken through, and the method adapts to the three-dimensional characteristics of the froth and the complexity of a detection scene.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology, and in particular to a visual inspection device for lithium mica flotation foam and a lithium mica flotation process. Background Technology

[0002] In the flotation process of lepidolite, after the addition of the collector, an industrial camera is needed to visually inspect the flotation foam. The industrial camera calculates parameters such as the time from foam formation to rupture and the proportion of foam on the surface of the flotation cell by continuous shooting, which can directly reflect the effect of the collector. Traditional manual sampling and testing of lepidolite grade or visual observation of foam have obvious defects. Sampling and testing need to be conducted offline. However, the flotation process may fluctuate every minute due to changes in raw material composition and reagent concentration. When abnormal indicators are found, the adjustment of collector dosage or process parameters has been delayed, which will lead to loss of lepidolite or decrease in product purity.

[0003] In related technologies, industrial cameras are required to visually inspect the flotation foam during lithium mica flotation. However, some existing visual inspection equipment is not convenient for adjusting the angle of the industrial camera during operation. Most industrial cameras are vertically installed on the top of the flotation cell, which is not conducive to overcoming the limitations of the vertical viewing angle and adapting to the three-dimensional characteristics of the foam and the complexity of the inspection scene.

[0004] Therefore, it is necessary to provide a visual inspection device for lithium mica flotation foam to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a visual inspection device for lithium mica flotation foam, which solves the technical problem that some existing visual inspection devices are not convenient for adjusting the angle of the industrial camera during operation.

[0006] To solve the above-mentioned technical problems, the present invention provides a visual inspection device for lithium mica flotation foam, comprising an inspection box, a moving inspection mechanism, and an adjustment mechanism; The mobile detection mechanism includes a bidirectional threaded screw, a mounting bracket, and an industrial camera. The industrial camera is located inside the mounting bracket and is vertically mounted above the flotation cell for taking images of the flotation foam from above. The surface of the bidirectional threaded screw is threaded with a screw block, and a movable frame is fixed to the front side of the screw block. The adjustment mechanism includes a rotating shaft, two adjusting gears, and two adjusting tooth plates. The rotating shaft is laterally rotatably connected to the inner side of the movable frame. The mounting bracket is fixedly connected to the rotating shaft. The two adjusting gears are respectively fixed at both ends of the rotating shaft. Protective frames are fixed on both sides of the inner wall of the detection box. The two adjusting tooth plates are respectively fixed on the inner side of the two protective frames.

[0007] Preferably, the bidirectional threaded screw is vertically rotatably connected to the inner side of the test box, and slide rails are fixed on both sides of the inner wall of the test box. The two sides of the movable frame are slidably connected to the slide rails, and a drive motor for driving the bidirectional threaded screw to rotate is provided on the top of the test box.

[0008] Preferably, the inner sides of both protective frames are provided with movable grooves that cooperate with the rotating shaft, and the two adjusting gears are respectively on the same vertical line as the two adjusting tooth plates. When the two adjusting gears move upward, they will contact the two adjusting tooth plates respectively and form a meshing state.

[0009] Preferably, an illumination mechanism is rotatably connected to the inner side of the testing box. The illumination mechanism includes a mounting frame rotatably connected to the inner side of the testing box. A strip LED light is fixed to the inner side of the mounting frame. Transmission gears are fixed to both sides of the mounting frame. Two drive gear plates are fixed to the bottom of the movable frame.

[0010] Preferably, protective mechanisms are fixed on both sides of the testing box. The protective mechanisms include mounting plates fixed on both sides of the testing box. An air knife is rotatably connected to one side of the two mounting plates facing each other. A swing frame is fixed on both sides of the air knife. An electric telescopic rod is fixed on both sides of the inner wall of the testing box. An adjustment frame is fixed on the output end of the two electric telescopic rods. An movable groove for cooperating with the swing frame is opened on the inner side of the adjustment frame.

[0011] Preferably, a distance sensor is fixed to 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 mounting bracket moving upward. 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 so that the working angle of the air knife matches the working angle of the industrial camera.

[0012] Preferably, a cleaning mechanism is fixedly provided at the bottom end of the bidirectional threaded screw. The cleaning mechanism includes a rotating disk fixedly provided at the bottom end of the bidirectional threaded screw, a connecting rod rotatably connected to the bottom of the rotating disk, a rotating shaft rotatably connected to the bottom of the detection box, a cleaning brush plate fixedly provided on the surface of the rotating shaft, a drive plate fixedly provided at the bottom end of the rotating shaft, and the drive plate rotatably connected to the connecting rod.

[0013] Preferably, the bottom of the testing box is provided with a testing frame, the surface of the testing frame is fixed with a connecting bracket, the inner side of the connecting bracket is provided with an infrared sensor, and the inner side of the testing frame is provided with an arc-shaped protective plate.

[0014] A lithium mica flotation process includes the following steps: Step S1: Preparation of the collector: 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%). 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. 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%). 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. 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. 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; 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. 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. Step S2, Lithium mica flotation: 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. 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. Step S3, Flotation Foam Detection: 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.

[0015] Compared with related technologies, the lithium mica flotation foam visual inspection device provided by the present invention has the following beneficial effects: 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

[0016] 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.

[0017] Figure 1 The optimal structural schematic diagram provided for this invention; Figure 2 This is a structural schematic diagram of the bottom view of the detection box provided by the present invention; Figure 3 This is a schematic diagram of the structure of the mobile detection mechanism and the adjustment mechanism provided by the present invention; Figure 4 This is a schematic diagram of the structure of the mounting bracket provided by the present invention; 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. Figure 6 A schematic diagram of the lighting mechanism provided by the present invention; 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. Figure 8 A schematic diagram of the protective mechanism provided by the present invention; 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. Figure 10 A schematic diagram of the cleaning mechanism provided by the present invention; Figure 11 This is a schematic diagram of the structure of the detection frame provided by the present invention; Figure 12 The chemical formula of the collector provided by this invention.

[0018] Explanation of icon numbers: 1. Testing box; 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; 3. Adjustment mechanism; 31. Rotating shaft; 32. Adjusting gear; 33. Adjusting gear plate; 34. Protective frame; 35. Moving slot; 4. Lighting mechanism; 41. Mounting bracket; 42. Strip LED light; 43. Transmission gear; 44. Drive gear plate; 5. Protective mechanism; 51. Mounting plate; 52. Air knife; 53. Swing frame; 54. Electric telescopic rod; 55. Adjustment frame; 6. Distance sensor; 7. Cleaning mechanism; 71. Rotary disc; 72. Connecting rod; 73. Rotating shaft; 74. Cleaning brush plate; 75. Drive plate; 8. Detection frame; 9. Connecting bracket; 10. Infrared sensor; 11. Curved protective plate.

[0019] 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

[0020] 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.

[0021] This invention provides a visual inspection device for flotation foam of lithium mica and a flotation process for lithium mica.

[0022] First embodiment: 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; 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. 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. Please combine Figure 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. 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. Preferably, the bottom of the testing box 1 is made of transparent acrylic material; 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. 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. 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.

[0023] 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.

[0024] Second embodiment: 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. 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. 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. 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. 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. Preferably, the air knife 52 is connected to an external air source device.

[0025] 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. 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.

[0026] Third embodiment: Please see Figure 10 and Figure 11 The 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. 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. Preferably, the connection point between the rotating disk 71 and the connecting rod 72 is far from the center of the rotating disk 71; 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. 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.

[0027] 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.

[0028] Fourth embodiment: Please see Figure 12 A lithium mica flotation process includes the following steps: Step S1: Preparation of the collector: 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%). 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. 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%). 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. 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. 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; 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. 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. 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. Preferably, the cationic collector includes one or more of dodecylamine, tetradecylamine, hexadecylamine, cocoamine, and dodecyltrimethylammonium chloride; Preferably, the pH adjuster includes one or more of sulfuric acid, sodium carbonate, sodium hydroxide, and triethanolamine; Preferably, the antioxidant includes one or more of hydroquinone, tert-butylhydroquinone, glycerol, surfactants, and fatty acids; Preferably, the solvent includes water or alcohol; Step S2, Lithium mica flotation: 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. 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. Step S3, Flotation Foam Detection: 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.

[0029] 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.

[0030] 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: 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. 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. 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. 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. 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. 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.

[0031] 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 spodumene flotation froth visual detection apparatus, characterized in that, Including detection box, mobile detection mechanism and adjusting 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, is vertically mounted above the flotation tank, and is used for shooting a flotation froth image from top to bottom, a screw block is threadedly connected to the surface of the two-way threaded screw rod, and a moving frame is fixedly arranged on the front side of the screw block; The adjusting mechanism includes a rotating shaft, two adjusting gears and two adjusting tooth plates, the rotating shaft is transversely and rotatably 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 respectively, and the two sides of the inner wall of the detection box are fixedly provided with protection frames, and the two adjusting tooth plates are fixedly arranged on the inner sides of the two protection frames.

2. The spodumene mica floatation froth visual detection apparatus of claim 1, wherein, The two-way threaded screw rod is rotatably connected to the inner side of the detection box, the two sides of the inner wall of the detection box are fixedly provided with sliding rails, the two 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 two-way threaded screw rod to rotate.

3. The spodumene mica floatation froth visual detection apparatus of claim 1, wherein, The inner sides of the two protection frames are both provided with a moving groove matched with the rotating shaft, the two adjusting gears are both on the same vertical line with the two adjusting tooth plates, and when the two adjusting gears move upward, the two adjusting gears are in contact with the two adjusting tooth plates and form a meshing state.

4. The spodumene mica floatation froth visual detection apparatus of claim 1, wherein, 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, transmission gears are fixedly arranged on the two sides of the mounting bracket, and two driving tooth plates are fixedly arranged on the bottom of the moving frame.

5. The spodumene mica floatation froth visual detection apparatus of claim 1, wherein, The two sides of the detection box are fixedly provided with protection mechanisms, the protection mechanisms include mounting plates fixedly arranged on the two sides of the detection box, wind knives are rotatably connected to the opposite sides of the two mounting plates, swing frames are fixedly arranged on the two sides of the wind knives, electric telescopic rods are fixedly arranged on the two sides of the inner wall of the detection box, adjusting frames are fixedly arranged on the output ends of the two electric telescopic rods, and movable grooves matched with the swing frames are formed in the inner sides of the adjusting frames.

6. The spodumene mica floatation froth visual detection apparatus of claim 5, wherein, 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 for monitoring the height of the upward movement of the mounting bracket, after the angle of the industrial camera changes when the mounting bracket moves upward by a certain height, the distance sensor transmits height data to a controller, 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.

7. The spodumene mica floatation froth visual detection apparatus of claim 1, wherein, A cleaning mechanism is fixedly arranged on the bottom end of the two-way threaded screw rod, the cleaning mechanism includes a rotating disc fixedly arranged on the bottom end of the two-way 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 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.

8. The spodumene mica floatation froth visual detection apparatus of claim 1, wherein, A detection frame is arranged on the bottom of the detection box, a connecting bracket is fixedly arranged on the surface of the detection frame, an infrared sensor is arranged on the inner side of the connecting bracket, and an arc-shaped protection plate is arranged on the inner side of the detection frame.

9. A lithium mica flotation process characterized by, The lithium mica flotation process comprises the flotation froth visual detection device according to any one of claims 1-8 and the following steps: Step S1, preparing a collector: 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 to reflux under Ar overnight, after the reaction, H2O was added, and the mixture was extracted with AcOEt, the organic solution was washed with saturated brine, dried over K2CO3, and rotary evaporated under reduced pressure, and the residue was subjected to column chromatography with AcOEt-hexane (1:8) to obtain A as a colorless oil (3.05 g, 75%); A was dissolved in an ethanol solution and hydrogenated on 10% Pd-C, after the reaction, the catalyst was filtered off using a diatomite pad, and the filtrate was evaporated to obtain B as a light yellow oil, which was finally solidified in a refrigerator; NEt3, THF and ethyl chloroformate were added to B at 0°C, the mixture was stirred at 0°C for 30-120 min, the insoluble substance was filtered off, the filtrate was added with NaBH4, THF and H2O under ice cooling, and stirred at room temperature for 5 hours to obtain C as a light yellow oil (2.23 g, 70%); pyridine, CHCl3 and methanesulfonyl chloride were added to C under ice cooling, and stirred at room temperature for 2.5 h, after the solvent was evaporated, the residue was extracted with AcOEt and H2O, the solution was washed with saturated aqueous solution, saturated copper sulfate and saturated brine in turn, dried over K2CO3, and evaporated to obtain D as a colorless oil; cyanomethyl phenylsulfinate 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 as a colorless oil; a mixture of E and 5% Na-Hg in a mixed solution of THF and MeOH was stirred at room temperature, after the inorganic substance was removed by filtration, the filtrate was evaporated, and the residue was subjected to column chromatography with AcOEt-hexane (1:3) to obtain F as a colorless oil; HCl and NaHCO3 were added to a mixture of F, ethanol, H2O and NH2OH, the reaction was stirred at 50°C for 3 days, and then stirred at 70°C for 2 days, the reaction mixture was partitioned with AcOEt and H2O, and the organic solution was washed with H2O and brine to obtain G as a colorless oil; protected G was 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 a colorless viscous oil; Step S2, lithium mica flotation: lithium mica ore was placed in a ball mill, ground and collected into a slurry, and the collected slurry was subjected to magnetic separation by a magnetic separator to remove magnetic minerals to obtain a magnetic separation concentrate; The concentrate after magnetic separation is poured into a flotation tank, and inhibitors, collectors and foaming agents are added, after roughing, cleaning and scavenging, filtration and drying are carried out, and finally a lepidolite concentrate is obtained; Step S3, flotation froth detection: An industrial camera is used to take pictures of the lepidolite flotation froth, and a software system is used to process the images, extract core visual features related to the flotation process, and 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 is inferred.

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