Low-temperature-adaptability high-magnesium type phosphorite flotation wastewater treatment equipment and process

Abstract

The invention provides low-temperature-adaptability high-magnesium type phosphorite flotation wastewater treatment equipment and process, and relates to the technical field of wastewater treatment, and the equipment comprises a treatment pond, a sealing cover, a reciprocating mechanism, an aeration mechanism, a switching mechanism and a slag scraping mechanism; the reciprocating mechanism comprises two mounting frames fixedly arranged on the two sides of the treatment pond, rotating shafts are longitudinally and rotatably connected to the interiors of the two mounting frames, two transmission wheels are fixedly arranged on the surfaces of the two rotating shafts, the four transmission wheels are divided into a front group and a rear group, and the surfaces of the transmission wheels in each group are sleeved with reciprocating belts. According to the scheme, the light floc is finally separated through air flotation, the situation that floating-state and colloid-state organic matter generated in the acidification gel breaking stage can wrap and consume a large amount of subsequently-added hydrogen peroxide, and consequently hydroxyl free radicals cannot be effectively generated to attack refractory pollutants really dissolved in water is avoided, so that the treatment effect on wastewater in the oxidation stage is improved, and the treatment cost is reduced. And invalid consumption of the oxidant is avoided.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to a low-temperature adaptable wastewater treatment device and process for high-magnesium phosphate rock flotation. Background Technology

[0002] As a strategic resource supporting the development of modern agriculture and the phosphate chemical industry, the level of its sorting technology is directly related to food security and resource utilization efficiency. In global phosphate resources, the proportion of high-magnesium phosphate rock is increasing, especially in major phosphate producing countries. The industrial utilization of such difficult-to-process ores and the treatment of flotation wastewater have become industry challenges.

[0003] In related technologies, during the flotation process of high-magnesium phosphate rock, flotation reagents, after completing their selective adsorption and inhibition functions, cannot be completely consumed. The unadsorbed portion remains in the slurry and eventually enters the wastewater. However, existing flotation wastewater treatment equipment is not suitable for effectively treating the flocs generated during the acidification and debriding stage. The large amount of suspended and colloidal organic matter precipitated after acidification will coat and consume a large amount of the added hydrogen peroxide, preventing it from effectively generating hydroxyl radicals to attack the recalcitrant pollutants that are actually dissolved in the water. This results in ineffective consumption of oxidants and poor flotation wastewater treatment.

[0004] Therefore, it is necessary to provide a low-temperature adaptable wastewater treatment equipment and process for high-magnesium phosphate rock flotation to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment and process, which solves the problem that existing flotation wastewater treatment equipment is not convenient for effectively treating the flocs generated during the acidification and debriding stage.

[0006] To solve the above-mentioned technical problems, the low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment provided by the present invention includes a treatment tank, a sealing cover, a reciprocating mechanism, an aeration mechanism, a switching mechanism, and a slag scraping mechanism.

[0007] The reciprocating mechanism includes two mounting frames fixed on both sides of the treatment pool. The interior of each mounting frame is longitudinally rotatably connected to a rotating shaft. The surface of each rotating shaft is fixed with two transmission wheels. The four transmission wheels are divided into front and rear groups, and the surface of each group of transmission wheels is fitted with a reciprocating belt. The bottom of the sealing cover is fixed with two slide rails. The surface of each slide rail is slidably connected with a sliding seat. The bottom of each sliding seat is fixed with a reciprocating frame. The top of each reciprocating belt is fixedly connected to the reciprocating frame. A reciprocating motor for driving the rotating shaft to rotate is provided on the front side of the left mounting frame.

[0008] The aeration mechanism includes an air outlet cylinder fixed to the top of the sealing cover, a piston slidably connected to the inner wall of the air outlet cylinder, a reciprocating bracket fixed to the bottom of the piston, the reciprocating bracket slidably connected to the sealing cover, a contact wheel rotatably connected to the bottom of the reciprocating bracket, a spring sleeved on the surface of the reciprocating bracket and located at the bottom of the sealing cover, a rotating shaft rotatably connected longitudinally inside the reciprocating frame, a cam connected to the keyway on the surface of the rotating shaft, the bottom of the contact wheel contacting the top of the cam, and a drive motor for driving the rotating shaft to rotate is installed inside the reciprocating frame. The aeration mechanism has four sets arranged sequentially from front to back.

[0009] The switching mechanism includes two sliding frames fixed to the right side of the reciprocating frame. A slider is slidably connected inside each of the two sliding frames. A connecting bracket is fixed to the right side of each of the two sliders. A buffer spring is fixed inside each of the two sliding frames and at the bottom of the slider. A connecting plate is fixed to the left side of each of the two sliders. An electric telescopic rod is fixed to the inside of the reciprocating frame. The output end of the electric telescopic rod is fixedly connected to the connecting plate. A connecting sleeve is fixed to the front of the connecting bracket. Two snap-fit ​​pieces are slidably connected inside the connecting sleeve. A return spring is sleeved on the surface of each of the two snap-fit ​​pieces.

[0010] The slag scraping mechanism includes two guide rails fixed to the inner wall of the treatment tank. Each of the two guide rails has a guide wheel inside. Each of the two guide wheels is rotatably connected to a support frame on its opposite side. Each of the two support frames has a rubber scraper fixed to its opposite side. Each of the two support frames has a snap-fit ​​seat fixed to its top. Each of the two snap-fit ​​seats has a snap ring slidably connected to its surface.

[0011] Preferably, the inner wall of the treatment tank is fixedly provided with a partition plate, the left side of the partition plate is a pretreatment chamber, the right side of the partition plate is an oxidation chamber, the pretreatment chamber is longitudinally provided with four aeration pipes, and the four air outlets are respectively connected to the four aeration pipes through aeration hoses. The left side of the partition plate and the left side of the inner wall of the treatment tank are both fixedly provided with slag collection plates.

[0012] Preferably, the switching mechanism is arranged in two sets of mirror images, the axis of the connecting sleeve and the axis of the snap-fit ​​seat are on the same vertical line, the interior of the connecting sleeve is provided with a cavity for use with the snap-fit ​​seat, and when the connecting sleeve moves downward, it connects with the snap-fit ​​seat through the cavity and the snap-fit ​​component.

[0013] Preferably, a feeding mechanism is fixedly provided on the right side of the connecting bracket. The feeding mechanism includes a feeding bin fixedly provided on the right side of the connecting bracket. Two rotating disks are provided inside the feeding bin. A drive shaft is fixedly provided longitudinally inside the two rotating disks. Five storage bins are arranged in a circular array on the circumferential side of the drive shaft and on the opposite side of the two rotating disks. A sealing plate is provided on the side of each of the five storage bins that is separated from each other. The two sides of the five sealing plates are rotatably connected to the opposite side of the two rotating disks. The storage bin is provided with a material cavity and two cavities. A compression spring is provided in each of the two cavities. A rotating gear is fixedly provided at the front end of the drive shaft. Five drive tooth plates are fixedly provided from left to right on the front side of the inner wall of the treatment tank.

[0014] Preferably, the dispensing mechanism is arranged in two sets in a front-to-back mirror configuration. The bottom of the dispensing hopper is provided with a through groove. When the sealing plate is fully rotated to the through groove, the compression spring will push the sealing plate to rotate, thereby causing the material in the material chamber to fall out. The material chamber is used to store powdered activated carbon. The five drive tooth plates correspond to the five storage hoppers respectively and are used to control the dispensing and sealing of the five storage hoppers.

[0015] Preferably, a mixing mechanism is rotatably connected to the left side of the inner wall of the treatment tank. The mixing mechanism includes a mixing shaft rotatably connected to the left side of the inner wall of the treatment tank. The right end of the mixing shaft is rotatably connected to a partition plate. Multiple mixing frames are provided on the surface of the mixing shaft. A mixing motor for driving the mixing shaft to rotate is provided on the left side of the treatment tank. One mixing mechanism is provided on each side, which is used to mix the liquids in the pretreatment chamber and the oxidation chamber, respectively.

[0016] Preferably, a support base is fixed to the front of the treatment tank, and a water pump is provided on the top of the support base. The water pump is connected to a water pumping pipe and a water draining pipe. The water pumping pipe is connected to the pretreatment chamber, and the water draining pipe is connected to the oxidation chamber.

[0017] Preferably, the front of the treatment tank is connected to two inlet pipes, the bottom of the treatment tank is connected to two outlet pipes, the bottom of the treatment tank is fixed with support legs, and the top of the sealing cover is connected to an exhaust pipe.

[0018] A low-temperature adaptable flotation process for high-magnesium phosphate ore includes the following steps:

[0019] Step S1, Mineral Gradient Liberation and Dispersion Regulation:

[0020] Based on the mineral dissemination characteristics, a synergistic liberation process of "coarse crushing-fine crushing-stage grinding" was designed. After the raw ore is coarsely crushed by a jaw crusher, it is further crushed by a double-roll fine crusher. Through the shear force-dominated crushing mechanism, the ore particles are crushed into uniform equiaxed shapes, reducing the proportion of flaky particles and the risk of abnormal increase in slurry viscosity. Subsequently, a closed-circuit ball milling system is used for primary grinding. Through steel ball gradation optimization and slurry concentration control, uniform distribution of mineral particle size is achieved. Combined with the chemical dispersion effect of dispersant, fine mud agglomeration is effectively inhibited, and the degree of mineral liberation is significantly improved, providing ideal mineral surface activity conditions for subsequent flotation.

[0021] Step S2, Development of Low-Temperature Response Composite Collector:

[0022] To address the issues of low-temperature crystallization and poor selectivity in traditional fatty acid collectors, a composite collector, LTC-850, was designed. This collector consists of sodium fatty acid, phosphate ester derivatives, and a bio-based emulsifier. Through the synergistic effect of molecular structure, it achieves stable dispersion at low temperatures. Sodium fatty acid provides basic collecting ability, phosphate ester derivatives enhance the specific adsorption of calcium active sites on the surface of phosphate minerals through their polar groups, and the bio-based emulsifier prevents the agent molecules from agglomerating at low temperatures through steric hindrance.

[0023] The emulsification process of this agent adopts a gradient heating method to form a uniform nanoscale micelle structure, ensuring that it diffuses rapidly in low-temperature slurry and adsorbs onto the surface of the target mineral, significantly reducing non-selective adhesion to gangue minerals such as dolomite and calcite.

[0024] A magnesium adsorption selective inhibitor, MGX-2024, was also designed. It is mainly composed of modified sodium lignosulfonate, carboxymethyl cellulose, and sodium silicate. It selectively blocks the magnesium active sites on the surface of dolomite and inhibits the flotation rate by >85%.

[0025] Step S3, Classification Flotation Process:

[0026] A three-stage sorting system is constructed, consisting of "rapid enrichment through coarse selection, deep purification through fine selection, and resource reuse through scavenging." Precise sorting is achieved through gradient optimization of process parameters.

[0027] Roughing stage: High-concentration slurry operation is adopted to quickly complete the initial enrichment of target minerals in a weakly alkaline environment. Collectors are added in stages, and the stability of mineralization foam is enhanced by the coordinated control of impeller speed and aeration volume, which significantly improves the recovery efficiency of rough concentrate.

[0028] Selected Section: By gradually diluting the pulp concentration and adjusting the pH value to strong alkalinity, combined with the polymer inhibitor MGX-2024, the flotation of silicates and residual carbonates is effectively inhibited, ensuring a step-by-step improvement in concentrate quality.

[0029] Sweeping section: Tailings are classified by high-frequency vibrating screen. The fine-grained minerals under the screen are returned to the coarse selection section for recycling, while the tailings over the screen are filtered and discharged harmlessly. Through dynamic control of the circulating load, the utilization of resources is maximized and the discharge of waste is minimized.

[0030] Wastewater treatment section: The flotation wastewater is pumped into the pretreatment chamber of the treatment tank to the designed liquid level, and low-speed stirring is started to initially mix the wastewater. Dilute sulfuric acid is slowly added through the dosing pipeline to acidify and break up the gel. The pretreated wastewater is then transported to the oxidation chamber for further treatment.

[0031] Compared with related technologies, the low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment provided by the present invention has the following beneficial effects:

[0032] After the wastewater has been treated with dilute sulfuric acid and the reaction has been completed, the rotating shaft drives the cam to rotate. With the help of the spring, the cam rotates and causes the reciprocating support and piston to move up and down, delivering the gas in the air outlet to the aeration pipe. The gas rises in the form of tiny bubbles in the wastewater. During the rising process, the bubbles combine with the tiny flocs, thus forming foam and scum on the water surface.

[0033] After foam and scum form on the water surface, the connecting plate moves downwards via the retraction of the electric telescopic rod. This downward movement of the connecting plate connects the connecting sleeve and the snap-fit ​​seat. At this time, the reciprocating belt rotates back and forth, causing the reciprocating frame to move left and right. This movement of the reciprocating frame, in turn, causes the rubber scraper to move left and right, scraping the foam and scum on the top of the wastewater into the scum collection plates on both sides. This completes the work of separating light flocs using air flotation, avoiding the floating and colloidal organic matter generated during the acidification and de-gelling stage from encapsulating and consuming large amounts of subsequently added hydrogen peroxide. This prevents the effective generation of hydroxyl radicals to attack the truly dissolved and recalcitrant pollutants in the water, thereby improving the treatment effect of the oxidation stage and avoiding the ineffective consumption of oxidant. Attached Figure Description

[0034] 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.

[0035] Figure 1 The optimal structural schematic diagram provided for this invention;

[0036] Figure 2 This is a structural schematic diagram of the processing pool rear view provided by the present invention;

[0037] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the treatment tank.

[0038] Figure 4 A schematic diagram of the switching mechanism, slag scraping mechanism, and dispensing mechanism provided by the present invention;

[0039] Figure 5 This is a schematic diagram of the reciprocating mechanism provided by the present invention;

[0040] Figure 6 This is a schematic diagram of the aeration mechanism provided by the present invention;

[0041] Figure 7 for Figure 6 The enlarged structural diagram at point A is shown below;

[0042] Figure 8 for Figure 6 The diagram shows a cross-sectional view of the air outlet.

[0043] Figure 9 A schematic diagram of the switching mechanism provided by the present invention;

[0044] Figure 10 for Figure 9 The diagram shows the structural schematic of the right view of the connecting bracket;

[0045] Figure 11 for Figure 9 The diagram shows the structure of the connecting bracket;

[0046] Figure 12 for Figure 9 The diagram shows a structural schematic of the cross-sectional view of the connecting sleeve.

[0047] Figure 13 This is a schematic diagram of the slag scraping mechanism provided by the present invention;

[0048] Figure 14 This is a schematic diagram of the dispensing mechanism provided by the present invention;

[0049] Figure 15 for Figure 14 The diagram shows a structural schematic of the cross-sectional view of the feeding hopper.

[0050] Figure 16 for Figure 15 The diagram shows a cross-sectional view of the storage silo.

[0051] Figure 17 A schematic diagram of the hybrid structure provided by the present invention;

[0052] Figure 18 A flotation process flow diagram provided by the present invention.

[0053] Explanation of icon numbers:

[0054] 1. Treatment tank; 2. Sealing cover;

[0055] 3. Reciprocating mechanism; 31. Mounting bracket; 32. Rotating shaft; 33. Transmission wheel; 34. Reciprocating belt; 35. Slide rail; 36. Sliding seat; 37. Reciprocating frame; 38. Reciprocating motor;

[0056] 4. Aeration mechanism; 41. Air outlet; 42. Piston; 43. Reciprocating support; 44. Contact wheel; 45. Spring; 46. Cam;

[0057] 5. Switching mechanism; 51. Sliding frame; 52. Slider; 53. Connecting bracket; 54. Buffer spring; 55. Connecting plate; 56. Electric telescopic rod; 57. Connecting sleeve; 58. Snap-fit ​​component; 59. Return spring;

[0058] 6. Slag scraping mechanism; 61. Guide rail; 62. Guide wheel; 63. Support frame; 64. Rubber scraper; 65. Snap-fit ​​seat; 66. Snap ring;

[0059] 7. Rotating shaft; 8. Drive motor; 9. Divider plate; 10. Aeration pipe; 11. Slag collection plate;

[0060] 12. Feeding mechanism; 121. Feeding bin; 122. Rotary disc; 123. Drive shaft; 124. Storage bin; 125. Sealing plate; 126. Compression spring; 127. Rotating gear; 128. Drive gear plate;

[0061] 13. Mixing mechanism; 131. Mixing shaft; 132. Mixing frame; 133. Mixing motor;

[0062] 14. Support base; 15. Water pump; 16. Inlet pipe; 17. Drain pipe; 18. Support leg; 19. Exhaust pipe. Detailed Implementation

[0063] 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.

[0064] This invention provides a low-temperature adaptable wastewater treatment device for high-magnesium phosphate rock flotation.

[0065] First embodiment:

[0066] Please see Figures 1 to 13A low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment device includes a treatment tank 1, a sealing cover 2, a reciprocating mechanism 3, an aeration mechanism 4, a switching mechanism 5, and a slag scraping mechanism 6.

[0067] The reciprocating mechanism 3 includes two mounting brackets 31 fixed on both sides of the treatment pool 1. The interior of each mounting bracket 31 is longitudinally rotatably connected to a rotating shaft 32. The surface of each rotating shaft 32 is fixed with two transmission wheels 33. The four transmission wheels 33 are divided into front and rear groups, and the surface of each group of transmission wheels 33 is fitted with a reciprocating belt 34. The bottom of the sealing cover 2 is fixed with two slide rails 35. The surface of each slide rail 35 is slidably connected with a sliding seat 36. The bottom of each sliding seat 36 is fixed with a reciprocating frame 37. The top of each reciprocating belt 34 is fixedly connected to the reciprocating frame 37. The front side of the left mounting bracket 31 is provided with a reciprocating motor 38 for driving the rotating shaft 32 to rotate.

[0068] The aeration mechanism 4 includes an air outlet cylinder 41 fixed to the top of the sealing cover 2. A piston 42 is slidably connected to the inner wall of the air outlet cylinder 41. A reciprocating bracket 43 is fixed to the bottom of the piston 42. The reciprocating bracket 43 is slidably connected to the sealing cover 2. A contact wheel 44 is rotatably connected to the bottom of the reciprocating bracket 43. A spring 45 is sleeved on the surface of the reciprocating bracket 43 and located at the bottom of the sealing cover 2. A rotating shaft 7 is rotatably connected longitudinally inside the reciprocating frame 37. A cam 46 is connected to the keyway on the surface of the rotating shaft 7. The bottom of the contact wheel 44 contacts the top of the cam 46. A drive motor 8 for driving the rotating shaft 7 to rotate is provided inside the reciprocating frame 37. The aeration mechanism 4 has four sets arranged from front to back.

[0069] The switching mechanism 5 includes two sliding frames 51 fixed to the right side of the reciprocating frame 37. A slider 52 is slidably connected inside each of the two sliding frames 51. A connecting bracket 53 is fixed to the right side of each of the two sliders 52. A buffer spring 54 is fixed inside each of the two sliding frames 51 and at the bottom of each slider 52. A connecting plate 55 is fixed to the left side of each of the two sliders 52. An electric telescopic rod 56 is fixed to the inner side of the reciprocating frame 37. The output end of the electric telescopic rod 56 is fixedly connected to the connecting plate 55. A connecting sleeve 57 is fixed to the front of the connecting bracket 53. Two snap-fit ​​pieces 58 are slidably connected inside the connecting sleeve 57. A return spring 59 is sleeved on the surface of each of the two snap-fit ​​pieces 58.

[0070] The slag scraping mechanism 6 includes two guide rails 61 fixed to the inner wall of the treatment tank 1. Each of the two guide rails 61 is provided with a guide wheel 62. Each of the two guide wheels 62 is rotatably connected to a support frame 63 on its opposite side. Each of the two support frames 63 is fixed with a rubber scraper 64 on its opposite side. Each of the two support frames 63 is fixed with a snap-fit ​​seat 65 on its top. Each of the two snap-fit ​​seats 65 is slidably connected with a snap ring 66 on its surface.

[0071] The inner wall of the treatment tank 1 is fixedly provided with a partition plate 9. The left side of the partition plate 9 is a pretreatment chamber and the right side of the partition plate 9 is an oxidation chamber. The pretreatment chamber is longitudinally provided with four aeration pipes 10. The four air outlets 41 are respectively connected to the four aeration pipes 10 through aeration hoses. The left side of the partition plate 9 and the left side of the inner wall of the treatment tank 1 are both fixedly provided with slag collection plates 11.

[0072] The switching mechanism 5 is arranged in two sets in a mirror image. The axis of the connecting sleeve 57 and the axis of the snap-fit ​​seat 65 are on the same vertical line. The connecting sleeve 57 has a cavity inside that works with the snap-fit ​​seat 65. When the connecting sleeve 57 moves downward, it connects to the snap-fit ​​seat 65 through the cavity and the snap-fit ​​piece 58.

[0073] Please combine Figure 5 : Start the reciprocating motor 38. The reciprocating motor 38 rotates and drives the left rotating shaft 32 to rotate. The rotation of the left rotating shaft 32 drives the two left transmission wheels 33 to rotate. Through the reciprocating belt 34, the right rotating shaft 32 and transmission wheels 33 are driven to rotate. The rotation of the reciprocating belt 34 drives the reciprocating frame 37 to move to the right, so that the two sliding seats 36 slide to the right on the surface of the slide rail 35.

[0074] Preferably, the bottom of the reciprocating frame 37 is provided with a clearance groove for use with the reciprocating belt 34, and both sides of the treatment pool 1 are provided with grooves for use with the reciprocating belt 34.

[0075] Please combine Figures 6 to 8 The drive motor 8 is started, and the drive motor 8 rotates, which in turn drives the rotating shaft 7 to rotate. The rotating shaft 7 rotates, which in turn drives the cam 46 to rotate. When the convex position of the cam 46 disengages from the contact wheel 44, under the expansion force of the spring 45, the reciprocating bracket 43 drives the piston 42 to slide downward inside the air outlet 41, thereby drawing gas. When the cam 46 continues to rotate, and the convex position of the cam 46 re-contacts the contact wheel 44, the contact wheel 44 pushes the reciprocating bracket 43 to move upward, causing the spring 45 to contract. The reciprocating bracket 43 moves upward, which in turn drives the piston 42 to slide upward inside the air outlet 41, thereby delivering the gas through the aeration hose to the aeration pipe 10, so that the gas floats in the liquid in the form of tiny bubbles.

[0076] Preferably, the air outlet 41 is connected to an air extraction pipe, and both the air extraction pipe and the aeration hose are equipped with one-way valves.

[0077] Preferably, the tiny bubbles released by the aeration pipe 10 adhere to the surface of the flocs, forming a copolymer of flocs and bubbles, which quickly float to the water surface to form scum, making it easy to scrape off.

[0078] Please combine Figure 4 , Figures 9 to 13 : Start the electric telescopic rod 56. The electric telescopic rod 56 retracts, which in turn drives the connecting plate 55 to move downward. The downward movement of the connecting plate 55 drives the two sliders 52 to slide downward on the inner side of the sliding frame 51. The downward movement of the two sliders 52 drives the connecting bracket 53 to move downward. The downward movement of the connecting bracket 53 drives the connecting sleeve 57 to move downward. The downward movement of the connecting sleeve 57 drives the two snap-fit ​​pieces 58 to move downward. When the bottom of the two snap-fit ​​pieces 58 contacts the top of the snap-fit ​​seat 65, the two snap-fit ​​pieces 58 move to the opposite side. At the same time, the return spring 59 retracts. As the snap-fit ​​pieces 58 continue to move downward, when the two snap-fit ​​pieces 58 disengage from the top protrusion of the snap-fit ​​seat 65, under the elastic force of the return spring 59, the two snap-fit ​​pieces 58 will move to the opposite side, thereby completing the connection between the connecting sleeve 57 and the snap-fit ​​seat 65.

[0079] Furthermore, as the two snap-fit ​​pieces 58 continue to move downwards and come into contact with the snap ring 66, they will move to opposite sides. When the two snap-fit ​​pieces 58 reach the bottom of the snap ring 66, they will move to opposite sides. At this time, when the connecting sleeve 57 moves the two snap-fit ​​pieces 58 upwards, the snap-fit ​​pieces 58 will simultaneously move the snap ring 66 upwards, causing the snap ring 66 to slide up and down on the surface of the snap-fit ​​base 65. When the top of the snap ring 66 contacts the bottom of the protruding part at the top of the snap-fit ​​base 65, and the connecting sleeve 57 continues to move the two snap-fit ​​pieces 58 upwards, they will move to opposite sides. After the connecting sleeve 57 moves upwards to a certain position, the connecting sleeve 57 will separate from the snap-fit ​​base 65.

[0080] Furthermore, when the connecting sleeve 57 is connected to the snap-fit ​​seat 65, the reciprocating frame 37 is moved to the right by the reciprocating belt 34. The reciprocating frame 37 will simultaneously move the connecting sleeve 57 and the snap-fit ​​seat 65 to the right through the connecting bracket 53. The snap-fit ​​seat 65 moves to the right, which in turn moves the support frame 63 and the rubber scraper 64 to the right. The rubber scraper 64 scrapes the scum and flocs on the top of the wastewater to the right into the scum collection plate 11. The left rotating shaft 32 rotates in both directions, causing the rubber scraper 64 to move left and right, scraping the scum and flocs on the top of the wastewater into the two scum collection plates 11.

[0081] Preferably, when treating flotation wastewater, dilute sulfuric acid is first slowly added through a dosing pipeline while continuous stirring to adjust the pH of the water to 3-4, thereby initiating acidification and degelatinization treatment. During the acidification and degelatinization stage, fatty acid flocs and fine sludge particles formed by the destabilization of MGX-2024 colloids will precipitate. If the process proceeds directly to the oxidation stage, these flocs will adsorb Fe. 2+ This reduces catalyst utilization and hinders the contact between free radicals and organic agents, thus requiring the flocculants in the wastewater to be treated before the oxidation stage.

[0082] Preferably, the top of the sealing cap 2 is connected to multiple agent dosing pipelines.

[0083] In this embodiment, after the wastewater has been treated with dilute sulfuric acid and the reaction has been completed, the rotating shaft 7 drives the cam 46 to rotate. With the cooperation of the spring 45, the cam 46 rotates, causing the reciprocating support 43 and the piston 42 to move up and down, delivering the gas in the air outlet 41 to the aeration pipe 10, so that the gas floats in the wastewater in the form of tiny bubbles. During the process of the bubbles rising, they combine with tiny flocs, thereby forming foam scum on the water surface.

[0084] After foam and scum form on the water surface, the electric telescopic rod 56 retracts, causing the connecting plate 55 to move downwards. The downward movement of the connecting plate 55 connects the connecting sleeve 57 and the snap-fit ​​seat 65. At this time, the reciprocating belt 34 rotates back and forth, causing the reciprocating frame 37 to move left and right. The left and right movement of the reciprocating frame 37 causes the rubber scraper 64 to move left and right, scraping the foam and scum on the top of the wastewater into the scum collection plates 11 on both sides. This completes the work of separating light flocs by air flotation, avoiding the floating and colloidal organic matter generated in the acidification and de-gelling stage from encapsulating and consuming a large amount of the subsequently added hydrogen peroxide, which would prevent it from effectively generating hydroxyl radicals to attack the recalcitrant pollutants that are actually dissolved in the water. This improves the treatment effect of the oxidation stage on the wastewater and avoids the ineffective consumption of oxidant.

[0085] Second embodiment:

[0086] Please see Figures 14 to 16The right side of the connecting bracket 53 is fixedly provided with a feeding mechanism 12. The feeding mechanism 12 includes a feeding bin 121 fixedly provided on the right side of the connecting bracket 53. The feeding bin 121 is provided with two rotating disks 122. The two rotating disks 122 are longitudinally fixedly provided with a drive shaft 123. Five storage bins 124 are arranged in a circular array on the circumferential side of the drive shaft 123 and on the opposite side of the two rotating disks 122. Each of the five storage bins 124 is provided with a sealing plate 125 on the side away from each other. The two sides of the five sealing plates 125 are rotatably connected to the opposite side of the two rotating disks 122. The storage bin 124 is provided with a material cavity and two cavities. Each of the two cavities is provided with a compression spring 126. The front end of the drive shaft 123 is fixedly provided with a rotating gear 127. Five drive tooth plates 128 are fixedly provided from left to right on the front side of the inner wall of the treatment pool 1.

[0087] The feeding mechanism 12 is arranged in two sets in a mirror image. The bottom of the feeding bin 121 is provided with a through groove. When the sealing plate 125 is fully rotated to the through groove, the compression spring 126 will push the sealing plate 125 to rotate, thereby causing the material in the material chamber to fall out. The material chamber is used to store powdered activated carbon. The five drive tooth plates 128 correspond to the five storage bins 124 respectively, and are used to control the feeding and sealing of the five storage bins 124.

[0088] Please combine Figures 14 to 16 When the reciprocating belt 34 drives the reciprocating frame 37 to move left and right, and the rubber scraper 64 cleans the foam and scum, the reciprocating mechanism 3 first resets the rubber scraper 64 to the left. Then, the electric telescopic rod 56 is controlled to separate the connecting sleeve 57 and the snap-fit ​​seat 65, and reset the connecting plate 55 and the connecting bracket 53. The reciprocating mechanism 3 is then started, and the reciprocating frame 37 and the connecting bracket 53 drive the feeding bin 121 to the right. During the rightward movement of the feeding bin 121, when the rotating gear 127 contacts the drive gear plate 128, the rotating gear... The wheel 127 then drives the drive shaft 123, storage bin 124, sealing plate 125 and rotating disk 122 to rotate. When the sealing plate 125 rotates to the through groove at the bottom of the feeding bin 121, the expansion of the compression spring 126 causes the sealing plate 125 to rotate, causing the powdered activated carbon in the material chamber of the storage bin 124 to fall into the wastewater. The reciprocating frame 37 continues to move to the right, causing the rotating gear 127 to contact the five drive gear plates 128 in sequence, thereby discharging the powdered activated carbon in multiple storage bins 124 to different positions in the wastewater.

[0089] Preferably, powdered activated carbon has both strong adsorption and porous framework functions, which can adsorb dissolved organic matter and colloids in water. At the same time, its own specific gravity is moderate, which can form a dense co-precipitate, and it can remove impurities that interfere with the subsequent oxidation stage.

[0090] Preferably, a distance sensor can be installed in the processing pool 1 to monitor the position of the reciprocating frame 37, thereby facilitating the connection and separation of the connecting sleeve 57 and the snap-fit ​​seat 65. The connection and separation of the connecting sleeve 57 and the snap-fit ​​seat 65 are both in the initial position on the left side.

[0091] In this embodiment, the feeding bin 121 is moved to the right by the reciprocating frame 37 and the connecting bracket 53. During the movement of the feeding bin 121 to the right, when the rotating gear 127 contacts the drive gear plate 128, the rotating gear 127 drives the drive shaft 123, the storage bin 124, the sealing plate 125 and the rotating disk 122 to rotate. When the sealing plate 125 rotates to the through groove at the bottom of the feeding bin 121, the sealing plate 125 is rotated by the compression spring 126, and the powdered activated carbon in the material chamber of the storage bin 124 is added to the wastewater. The inorganic or high-density flocs remaining in the water after the air flotation treatment can quickly build a dense sedimentation structure by adding powdered activated carbon, thereby treating the larger flocs in the wastewater to settle.

[0092] Third embodiment:

[0093] Please see Figure 1 , Figure 2 and Figure 17 A mixing mechanism 13 is rotatably connected to the left side of the inner wall of the treatment tank 1. The mixing mechanism 13 includes a mixing shaft 131 rotatably connected to the left side of the inner wall of the treatment tank 1. The right end of the mixing shaft 131 is rotatably connected to the partition plate 9. Multiple mixing frames 132 are provided on the surface of the mixing shaft 131. A mixing motor 133 for driving the mixing shaft 131 to rotate is provided on the left side of the treatment tank 1. One mixing mechanism 13 is provided on each side, which are used to mix the liquids in the pretreatment chamber and the oxidation chamber, respectively.

[0094] A support base 14 is fixedly provided on the front of the treatment tank 1, and a water pump 15 is provided on the top of the support base 14. The water pump 15 is connected to a water pumping pipe and a water draining pipe. The water pumping pipe is connected to the pretreatment chamber, and the water draining pipe is connected to the oxidation chamber.

[0095] The front of the treatment tank 1 is connected to two inlet pipes 16, the bottom of the treatment tank 1 is connected to two drain pipes 17, the bottom of the treatment tank 1 is fixed with a support leg 18, and the top of the sealing cover 2 is connected to an exhaust pipe 19.

[0096] Please combine Figure 17 Start the mixing motor 133. The mixing motor 133 rotates, which in turn drives the mixing shaft 131 to rotate. The rotation of the mixing shaft 131 drives multiple sets of mixing frames 132 to rotate, thereby mixing the wastewater and the reagent.

[0097] Preferably, after the wastewater pretreatment is completed, the supernatant is pumped from the pretreatment chamber to the oxidation chamber by water pump 15, ferrous sulfate is added as a catalyst, and hydrogen peroxide is slowly added as an oxidant to oxidize the wastewater. After oxidation treatment, coagulation, sedimentation and neutralization are carried out, and the chemical sludge generated in the treatment tank 1 is pumped into the sludge thickening tank, and then dewatered by a plate and frame filter press. The sludge cake can be sent to the tailings dam for safe storage or to study the resource utilization path according to the composition.

[0098] In this embodiment, the mixing motor 133 rotates, which in turn drives the mixing shaft 131 to rotate. The rotation of the mixing shaft 131 in turn drives multiple sets of mixing frames 132 to rotate, thereby mixing the wastewater and the reagent. After the wastewater pretreatment is completed, the upper clear liquid is pumped from the pretreatment chamber to the oxidation chamber by the water pump 15. Ferrous sulfate is added as a catalyst, and hydrogen peroxide is slowly added as an oxidant to oxidize the wastewater.

[0099] The present invention also provides a low-temperature adaptable flotation process for high-magnesium phosphate rock.

[0100] Please see Figure 18 A low-temperature adaptable high-magnesium phosphate rock flotation process includes the following steps:

[0101] Step S1, Mineral Gradient Liberation and Dispersion Regulation:

[0102] Based on the mineral dissemination characteristics, a synergistic liberation process of "coarse crushing-fine crushing-stage grinding" was designed. After the raw ore is coarsely crushed by a jaw crusher, it is further crushed by a double-roll fine crusher. Through the shear force-dominated crushing mechanism, the ore particles are crushed into uniform equiaxed shapes, reducing the proportion of flaky particles and the risk of abnormal increase in slurry viscosity. Subsequently, a closed-circuit ball milling system is used for primary grinding. Through steel ball gradation optimization and slurry concentration control, uniform distribution of mineral particle size is achieved. Combined with the chemical dispersion effect of dispersant, fine mud agglomeration is effectively inhibited, and the degree of mineral liberation is significantly improved, providing ideal mineral surface activity conditions for subsequent flotation.

[0103] Step S2, Development of Low-Temperature Response Composite Collector:

[0104] To address the issues of low-temperature crystallization and poor selectivity in traditional fatty acid collectors, a composite collector, LTC-850, was designed. This collector consists of sodium fatty acid, phosphate ester derivatives, and a bio-based emulsifier. Through the synergistic effect of molecular structure, it achieves stable dispersion at low temperatures. Sodium fatty acid provides basic collecting ability, phosphate ester derivatives enhance the specific adsorption of calcium active sites on the surface of phosphate minerals through their polar groups, and the bio-based emulsifier prevents the agent molecules from agglomerating at low temperatures through steric hindrance.

[0105] The emulsification process of this agent adopts a gradient heating method to form a uniform nanoscale micelle structure, ensuring that it diffuses rapidly in low-temperature slurry and adsorbs onto the surface of the target mineral, significantly reducing non-selective adhesion to gangue minerals such as dolomite and calcite.

[0106] A magnesium adsorption selective inhibitor, MGX-2024, was also designed. It is mainly composed of modified sodium lignosulfonate, carboxymethyl cellulose, and sodium silicate. It selectively blocks the magnesium active sites on the surface of dolomite and inhibits the flotation rate by >85%.

[0107] Step S3, Classification Flotation Process:

[0108] A three-stage sorting system is constructed, consisting of "rapid enrichment through coarse selection, deep purification through fine selection, and resource reuse through scavenging." Precise sorting is achieved through gradient optimization of process parameters.

[0109] Roughing stage: High-concentration slurry operation is adopted to quickly complete the initial enrichment of target minerals in a weakly alkaline environment. Collectors are added in stages, and the stability of mineralization foam is enhanced by the coordinated control of impeller speed and aeration volume, which significantly improves the recovery efficiency of rough concentrate.

[0110] Selected Section: By gradually diluting the pulp concentration and adjusting the pH value to strong alkalinity, combined with the polymer inhibitor MGX-2024, the flotation of silicates and residual carbonates is effectively inhibited, ensuring a step-by-step improvement in concentrate quality.

[0111] Sweeping section: Tailings are classified by high-frequency vibrating screen. The fine-grained minerals under the screen are returned to the coarse selection section for recycling, while the tailings over the screen are filtered and discharged harmlessly. Through dynamic control of the circulating load, the utilization of resources is maximized and the discharge of waste is minimized.

[0112] Wastewater treatment section: Pump the flotation wastewater into the pretreatment chamber of treatment tank 1 to the designed liquid level, start low-speed stirring to initially mix the wastewater, slowly add dilute sulfuric acid through the dosing pipeline to acidify and break the gel, and then transport the pretreated wastewater to the oxidation chamber for deep treatment.

[0113] Preferred method: Mineral gradient dissociation and dispersion regulation:

[0114] Crushing process:

[0115] The raw ore is coarsely crushed to -8mm by a jaw crusher (XPC-60×100 type) and then fed into a double roll crusher (PX-Φ200×75 type) with a roller gap of 0.3±0.05mm. The crushed product contains ≥90% equiaxed particles smaller than 2mm and <5% flaky particles.

[0116] Grinding optimization:

[0117] A closed-circuit ball mill is used: a Φ240×90 conical ball mill is used, with steel balls of large (Φ15mm), medium (Φ10mm), and small (Φ5mm) in a ratio of 6:3:1, slurry concentration of 65%, grinding time of 10 minutes, to obtain slurry with -200 mesh content of 60%;

[0118] Second-stage enhanced regrinding: For the intergrowths of about 25% in the roughing tailings, a vertical stirred mill (MITR-Φ120×300 type) is used, with 0.8 kg / t of sodium hexametaphosphate added, and the ore is ground to a -400 mesh ratio of ≥85% and a degree of liberation of 90%.

[0119] Preferred design and application of compound pharmaceutical systems:

[0120] Inhibitor nomenclature and formulation:

[0121] Inhibitor name: MGX-2024 (magnesium adsorption selective inhibitor);

[0122] Components: Modified sodium lignosulfonate (70%) + carboxymethyl cellulose (20%) + sodium silicate (10%).

[0123] Function: Selectively blocks magnesium active sites on the surface of dolomite, inhibiting flotation rate >85%;

[0124] Addition amount: Added in stages for the selected section, with a total amount of 280g / t (coarse selection: 200g / t, selected section I: 50g / t, selected section II: 30g / t);

[0125] Nomenclature and Combination of Collectors:

[0126] Collector name: LTC-850 (low-temperature compound collector);

[0127] Composition: Sodium fatty acid (60%) + isooctyl phosphate (30%) + bio-based polyglycerol ester (10%);

[0128] Low-temperature performance: viscosity ≤15mPa·s at 5℃, contact angle 78° (phosphorus minerals), selective adsorption coefficient >3.5;

[0129] Addition strategy: Total dosage for roughing stage is 500g / t (70% added during initial pulp conditioning, and 30% added during roughing stage II), and 50g / t and 30g / t are added for scavenging stage;

[0130] Preferred, multi-stage flotation separation process:

[0131] Preliminary selection:

[0132] The pulp concentration was 35±3%, pH was 9.8±0.2 (adjusted with Na2CO3), impeller speed was 1800±50rpm, and aeration rate was 0.35±0.05m³ / (m²·min).

[0133] Selected segments (deeply purified):

[0134] Selected Grade I: Pulp concentration 25%, pH 10.5, with the addition of 50g / t of MGX-2024 inhibitor, the P2O5 grade is increased to 28%;

[0135] Selected II: Concentration 20%, pH 11.0, with the addition of 30g / t of MGX-2024 inhibitor to remove 85% of residual dolomite;

[0136] Selected Grade III: Concentration 18%, pH 11.5, concentrate P2O5 up to 34%, MgO ≤ 1.5%;

[0137] Scan selected sections:

[0138] The tailings from the roughing process are treated such that -38μm fine particles (≥90%) are returned to the roughing process, the P2O5 loss rate of the tailings is ≤2%, and the COD value of the wastewater is ≤150mg / L.

[0139] In this embodiment, physical crushing and grinding optimization are used to achieve full and uniform dissociation of minerals, creating ideal mineral surface conditions for flotation. Through the self-developed low-temperature responsive composite collector and selective inhibitor, efficient and selective collection of target minerals and specific inhibition of key gangue minerals are achieved at the molecular level under low-temperature conditions. Finally, through the refined control of the staged flotation process, the stepwise enrichment and purification of phosphorus minerals are achieved, while maximizing resource utilization and minimizing waste emissions.

[0140] Please refer to the reference again. Figures 1 to 17 The working principle of the low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment provided by the present invention is as follows:

[0141] Step S1: Pump the flotation wastewater into the pretreatment chamber of treatment tank 1 to the designed liquid level, start low-speed stirring to initially mix the wastewater, and slowly add dilute sulfuric acid through the dosing pipeline to acidify and break the gel. After the reaction is completed, start the drive motor 8. The drive motor 8 rotates and drives the rotating shaft 7 to rotate. The rotating shaft 7 rotates and drives the cam 46 to rotate. When the convex position of the cam 46 disengages from the contact wheel 44, under the expansion force of the spring 45, the reciprocating bracket 43 drives the piston 42 to slide downward inside the air outlet 41, thereby extracting gas. When the convex position of the cam 46 re-contacts the contact wheel 44, the contact wheel 44 pushes the reciprocating bracket 43 to move upward, causing the spring 45 to contract and drive the piston 42 to slide upward inside the air outlet 41, thereby delivering the gas through the aeration hose to the aeration pipe 10, so that the gas floats in the liquid in the form of tiny bubbles.

[0142] In step S2, the tiny bubbles released by the aeration pipe 10 adhere to the surface of the flocs, forming a copolymer of flocs and bubbles, which quickly float to the water surface to form scum. The electric telescopic rod 56 is activated, and the electric telescopic rod 56 retracts, causing the connecting plate 55 to move downward. The downward movement of the connecting plate 55 causes the two sliders 52 and the connecting bracket 53 to move downward. The downward movement of the connecting bracket 53 causes the connecting sleeve 57 and the two snap-fit ​​pieces 58 to move downward. When the bottom of the two snap-fit ​​pieces 58 contacts the top of the snap-fit ​​seat 65, the two snap-fit ​​pieces 58 move to the opposite side, and at the same time, the return spring 59 contracts. As the snap-fit ​​pieces 58 continue to move downward, when the two snap-fit ​​pieces 58 disengage from the protruding position on the top of the snap-fit ​​seat 65, under the elastic force of the return spring 59, the two snap-fit ​​pieces 58 will move to the opposite side, completing the connection between the connecting sleeve 57 and the snap-fit ​​seat 65.

[0143] In step S3, after the connecting sleeve 57 is connected to the snap-fit ​​seat 65, the reciprocating belt 34 drives the reciprocating frame 37 to move to the right. The reciprocating frame 37, through the connecting bracket 53, will simultaneously drive the connecting sleeve 57 and the snap-fit ​​seat 65 to move to the right. The snap-fit ​​seat 65 moving to the right will in turn drive the support frame 63 and the rubber scraper 64 to move to the right. The rubber scraper 64 will scrape the scum and flocs on the top of the wastewater to the right into the scum collection plate 11. The left rotating shaft 32 rotates in both directions, thereby causing the rubber scraper 64 to move left and right, scraping the scum and flocs on the top of the wastewater into the two scum collection plates 11.

[0144] Step S4: When the reciprocating belt 34 drives the reciprocating frame 37 to move left and right, and the rubber scraper 64 is used to clean the foam scum, the reciprocating mechanism 3 is used to reset the rubber scraper 64 to the left. Then, the electric telescopic rod 56 is controlled to separate the connecting sleeve 57 and the snap-fit ​​seat 65, and the connecting plate 55 and the connecting bracket 53 are reset. The reciprocating mechanism 3 is then started, and the feeding bin 121 is driven to move to the right through the reciprocating frame 37 and the connecting bracket 53.

[0145] In step S5, during the movement of the feeding bin 121 to the right, when the rotating gear 127 contacts the drive gear plate 128, the rotating gear 127 drives the drive shaft 123, the storage bin 124, the sealing plate 125 and the rotating disk 122 to rotate. When the sealing plate 125 rotates to the through groove at the bottom of the feeding bin 121, the expansion of the compression spring 126 causes the sealing plate 125 to rotate, causing the powdered activated carbon in the material chamber of the storage bin 124 to fall into the wastewater. As the reciprocating frame 37 continues to move to the right, the rotating gear 127 contacts the five drive gear plates 128 in sequence, distributing the powdered activated carbon in multiple storage bins 124 to different positions in the wastewater.

[0146] Step S6: After the pretreatment of the wastewater is completed, the supernatant is pumped from the pretreatment chamber to the oxidation chamber by water pump 15. Ferrous sulfate is added as a catalyst and hydrogen peroxide is slowly added as an oxidant to oxidize the wastewater. After oxidation, coagulation, sedimentation and neutralization are carried out. The chemical sludge generated in treatment tank 1 is pumped into the sludge thickening tank and then dewatered by plate and frame filter press. The sludge cake can be sent to the tailings dam for safe storage or to study the resource utilization path according to the composition.

[0147] In step S7, during the wastewater treatment process, the mixing motor 133 is started. The mixing motor 133 rotates, which in turn drives the mixing shaft 131 to rotate. The rotation of the mixing shaft 131 drives multiple sets of mixing frames 132 to rotate, thereby mixing the wastewater and the reagent.

[0148] 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 low-temperature adaptable wastewater treatment device for high-magnesium phosphate rock flotation, characterized in that, This includes a treatment tank, a sealing cover, a reciprocating mechanism, an aeration mechanism, a switching mechanism, and a sludge scraping mechanism; The reciprocating mechanism includes two mounting frames fixed on both sides of the treatment pool. The interior of each mounting frame is longitudinally rotatably connected to a rotating shaft. The surface of each rotating shaft is fixed with two transmission wheels. The four transmission wheels are divided into front and rear groups, and the surface of each group of transmission wheels is fitted with a reciprocating belt. The bottom of the sealing cover is fixed with two slide rails. The surface of each slide rail is slidably connected with a sliding seat. The bottom of each sliding seat is fixed with a reciprocating frame. The top of each reciprocating belt is fixedly connected to the reciprocating frame. A reciprocating motor for driving the rotating shaft to rotate is provided on the front side of the left mounting frame. The aeration mechanism includes an air outlet cylinder fixed to the top of the sealing cover, a piston slidably connected to the inner wall of the air outlet cylinder, a reciprocating bracket fixed to the bottom of the piston, the reciprocating bracket slidably connected to the sealing cover, a contact wheel rotatably connected to the bottom of the reciprocating bracket, a spring sleeved on the surface of the reciprocating bracket and located at the bottom of the sealing cover, a rotating shaft rotatably connected longitudinally inside the reciprocating frame, a cam connected to the keyway on the surface of the rotating shaft, the bottom of the contact wheel contacting the top of the cam, and a drive motor for driving the rotating shaft to rotate is installed inside the reciprocating frame. The aeration mechanism has four sets arranged sequentially from front to back. The switching mechanism includes two sliding frames fixed to the right side of the reciprocating frame. A slider is slidably connected inside each of the two sliding frames. A connecting bracket is fixed to the right side of each of the two sliders. A buffer spring is fixed inside each of the two sliding frames and at the bottom of the slider. A connecting plate is fixed to the left side of each of the two sliders. An electric telescopic rod is fixed to the inside of the reciprocating frame. The output end of the electric telescopic rod is fixedly connected to the connecting plate. A connecting sleeve is fixed to the front of the connecting bracket. Two snap-fit ​​pieces are slidably connected inside the connecting sleeve. A return spring is sleeved on the surface of each of the two snap-fit ​​pieces. The slag scraping mechanism includes two guide rails fixed to the inner wall of the treatment tank. Each of the two guide rails has a guide wheel inside. Each of the two guide wheels is rotatably connected to a support frame on its opposite side. Each of the two support frames has a rubber scraper fixed to its opposite side. Each of the two support frames has a snap-fit ​​seat fixed to its top. Each of the two snap-fit ​​seats has a snap ring slidably connected to its surface.

2. The low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment according to claim 1, characterized in that, The inner wall of the treatment tank is fixedly provided with a partition plate. The left side of the partition plate is a pretreatment chamber and the right side of the partition plate is an oxidation chamber. The pretreatment chamber is longitudinally provided with four aeration pipes. The four air outlets are respectively connected to the four aeration pipes through aeration hoses. The left side of the partition plate and the left side of the inner wall of the treatment tank are both fixedly provided with slag collection plates.

3. The low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment according to claim 1, characterized in that, The switching mechanism is arranged in two sets of mirror images. The axis of the connecting sleeve and the axis of the snap-fit ​​seat are on the same vertical line. The connecting sleeve has a cavity inside that works with the snap-fit ​​seat. When the connecting sleeve moves downward, it connects with the snap-fit ​​seat through the cavity and the snap-fit ​​component.

4. The low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment according to claim 1, characterized in that, A feeding mechanism is fixedly installed on the right side of the connecting bracket. The feeding mechanism includes a feeding bin fixedly installed on the right side of the connecting bracket. Two rotating disks are arranged inside the feeding bin. A drive shaft is fixedly installed longitudinally inside the two rotating disks. Five storage bins are arranged in a circular array on the circumferential side of the drive shaft and on the opposite side of the two rotating disks. A sealing plate is provided on the side of each of the five storage bins that is separated from each other. The two sides of the five sealing plates are rotatably connected to the opposite side of the two rotating disks. The storage bin is provided with a material cavity and two empty cavities. A compression spring is provided in each of the two empty cavities. A rotating gear is fixedly installed at the front end of the drive shaft. Five drive tooth plates are fixedly installed from left to right on the front side of the inner wall of the treatment tank.

5. The low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment according to claim 4, characterized in that, The feeding mechanism is arranged in two sets, one in front and one behind. The bottom of the feeding bin has a through groove. When the sealing plate is fully rotated to the through groove, the compression spring will push the sealing plate to rotate, so that the material in the material chamber will fall out. The material chamber is used to store powdered activated carbon. The five drive tooth plates correspond to the five storage bins respectively and are used to control the feeding and sealing of the five storage bins.

6. The low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment according to claim 2, characterized in that, A mixing mechanism is rotatably connected to the left side of the inner wall of the treatment tank. The mixing mechanism includes a mixing shaft rotatably connected to the left side of the inner wall of the treatment tank. The right end of the mixing shaft is rotatably connected to a partition plate. Multiple mixing frames are provided on the surface of the mixing shaft. A mixing motor for driving the mixing shaft to rotate is provided on the left side of the treatment tank. There is one mixing mechanism on each side, which is used to mix the liquids in the pretreatment chamber and the oxidation chamber, respectively.

7. The low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment according to claim 1, characterized in that, A support base is fixed to the front of the treatment tank, and a water pump is installed on the top of the support base. The water pump is connected to a water pumping pipe and a water draining pipe. The water pumping pipe is connected to the pretreatment chamber, and the water draining pipe is connected to the oxidation chamber.

8. The low-temperature adaptable high-magnesium phosphate rock flotation wastewater treatment equipment according to claim 1, characterized in that, The treatment tank has two inlet pipes connected to its front side, two outlet pipes connected to its bottom side, a support leg fixed to its bottom side, and an exhaust pipe connected to the top of the sealing cover.

9. A low-temperature adaptable flotation process for high-magnesium phosphate ore, characterized in that, The flotation process includes the flotation wastewater treatment equipment as described in any one of claims 1-8 and the following steps: Step S1, Mineral Gradient Liberation and Dispersion Regulation: Based on the mineral dissemination characteristics, a synergistic liberation process of "coarse crushing-fine crushing-stage grinding" was designed. After the raw ore is coarsely crushed by a jaw crusher, it is further crushed by a double-roll mill. Through the shear force-dominated crushing mechanism, the ore particles are crushed into uniform equiaxed shapes, reducing the proportion of flaky particles and the risk of abnormal increase in slurry viscosity. Subsequently, a closed-circuit ball mill system is used for primary grinding. Through steel ball gradation optimization and slurry concentration control, uniform distribution of mineral particle size is achieved. Combined with the chemical dispersion effect of dispersant, fine mud agglomeration is effectively inhibited, and the degree of mineral liberation is significantly improved, providing ideal mineral surface activity conditions for subsequent flotation. Step S2, Development of Low-Temperature Response Composite Collector: To address the issues of low-temperature crystallization and poor selectivity in traditional fatty acid collectors, a composite collector, LTC-850, was designed. This collector consists of sodium fatty acid, phosphate ester derivatives, and a bio-based emulsifier. Through the synergistic effect of molecular structure, it achieves stable dispersion at low temperatures. Sodium fatty acid provides basic collecting ability, phosphate ester derivatives enhance the specific adsorption of calcium active sites on the surface of phosphate minerals through their polar groups, and the bio-based emulsifier prevents the agent molecules from agglomerating at low temperatures through steric hindrance. The emulsification process of this agent adopts a gradient heating method to form a uniform nanoscale micelle structure, ensuring that it diffuses rapidly in low-temperature slurry and adsorbs onto the surface of the target mineral, significantly reducing non-selective adhesion to gangue minerals such as dolomite and calcite. A magnesium adsorption selective inhibitor, MGX-2024, was also designed. It is mainly composed of modified sodium lignosulfonate, carboxymethyl cellulose, and sodium silicate. It selectively blocks the magnesium active sites on the surface of dolomite and inhibits the flotation rate by >85%. Step S3, Classification Flotation Process: A three-stage sorting system is constructed, consisting of "rapid enrichment through coarse selection, deep purification through fine selection, and resource reuse through scavenging," achieving precise sorting through gradient optimization of process parameters. Roughing stage: High-concentration slurry operation is adopted to quickly complete the initial enrichment of target minerals in a weakly alkaline environment. Collectors are added in stages, and the stability of mineralization foam is enhanced by the coordinated control of impeller speed and aeration volume, which significantly improves the recovery efficiency of rough concentrate. Selected Section: By gradually diluting the pulp concentration and adjusting the pH value to strong alkalinity, combined with the polymer inhibitor MGX-2024, the flotation of silicates and residual carbonates is effectively inhibited, ensuring a step-by-step improvement in concentrate quality. Sweeping section: Tailings are classified by high-frequency vibrating screen. The fine-grained minerals under the screen are returned to the coarse selection section for recycling, while the tailings over the screen are filtered and discharged harmlessly. Through dynamic control of the circulating load, the utilization of resources is maximized and the discharge of waste is minimized. Wastewater treatment section: The flotation wastewater is pumped into the pretreatment chamber of the treatment tank to the designed liquid level, and low-speed stirring is started to initially mix the wastewater. Dilute sulfuric acid is slowly added through the dosing pipeline to acidify and break up the gel. The pretreated wastewater is then transported to the oxidation chamber for further treatment.

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