A high-efficiency phosphorus separation device and its recovery process

Abstract

This invention relates to the field of flotation machine technology, specifically to a high-efficiency phosphorus separation device and its recovery process. The high-efficiency phosphorus separation device includes a separation box, an impeller, a stator, a venting pipe, and a first drive mechanism. The separation box is used to contain slurry. The impeller has a central shaft and multiple first blades evenly distributed around the central shaft. The first blades are divided into an upper part and a lower part. The upper part is a vertical flat plate, and the lower part is an arc-shaped plate that gradually curves horizontally from top to bottom. The stator is sleeved on the outside of the impeller. The venting pipe is coaxially sleeved on the outside of the central shaft and located at the center of the multiple first blades. The venting pipe is used to introduce external gas into the center of the multiple first blades. The first drive mechanism drives the multiple first blades to rotate synchronously through the central shaft, thereby enabling the arc-shaped plate to push the slurry at the bottom of the separation box upward, thus improving the phosphorus separation efficiency.

Description

Technical Field

[0001] This invention relates to the field of flotation machine technology, and in particular to a high-efficiency phosphorus separation device and its recovery process. Background Technology

[0002] In the process of phosphorus separation and purification, flotation machines are key and commonly used equipment, especially in the beneficiation stage of phosphate rock, where they are the core device for achieving efficient separation of phosphate minerals and gangue.

[0003] Patent application CN 120286199A discloses an impeller-stator assembly for a circular flotation machine, including an impeller and a stator assembly. The impeller rotates under power and includes a conical disc with a distributor connected to a vent at the lower end. The stator assembly consists of two half-stators and is equipped with guide plates and blades. An external drive unit rotates the impeller, and under centrifugal force, the slurry and reagents are drawn in from the bottom of the impeller and discharged from the upper part along the conical disc. Under the action of the guide plates and blades, an upward radial turbulence is formed. As the slurry is discharged, a negative pressure is formed in the upper part of the impeller, and air enters the distributor and then the slurry through the vent. Under the action of the impeller rotation, the air is broken up to form bubbles. The mineral particles, reagents, and bubbles in the slurry are thoroughly mixed. Under the action of the reagents, some mineral particles float to the surface with the bubbles, while other mineral particles are drawn back in from the bottom of the impeller and mixed with the bubbles to form radial turbulence, thus creating a circulation at the bottom. However, when using this type of flotation machine to process phosphate rock, large particles in the slurry tend to settle at the bottom, thus affecting the flotation efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide a high-efficiency phosphorus separation device and its recovery process to address the technical problem that large particles in the slurry tend to sink easily, resulting in low flotation efficiency.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A high-efficiency phosphorus separation device includes a separation chamber, an impeller, a stator, a vent pipe, and a first drive mechanism. The separation chamber is used to contain slurry. The impeller has a central shaft extending in a vertical direction and multiple first blades evenly distributed around the central shaft. The width of the first blades extends radially along the central shaft, and the length of the first blades extends in a vertical direction. The first blades are divided into an upper half and a lower half in a vertical direction. The upper half is a vertical flat plate, and the lower half is an arc-shaped plate that gradually curves horizontally from top to bottom. The stator is sleeved on the outside of the impeller and is used to disperse the slurry after centrifugation by the first blades. The vent pipe is coaxially sleeved on the outside of the central shaft and located at the center of the multiple first blades. The vent pipe is used to introduce external gas into the center of the multiple first blades. The first drive mechanism is located at the top of the separation chamber and is connected to the central shaft. The first drive mechanism drives the multiple first blades to rotate synchronously through the central shaft, thereby enabling the arc-shaped plate to push the slurry at the bottom of the separation chamber upward.

[0007] Furthermore, the width of the first blade gradually decreases from top to bottom.

[0008] Furthermore, the stator includes an inner stator, which comprises an upper stator and a lower stator sequentially distributed along the vertical direction. The axes of the upper and lower stators both extend along the vertical direction, and both the upper and lower stators are sleeved on the outside of the impeller. The upper stator corresponds to the upper half of the first blade, and the lower stator corresponds to the lower half of the first blade. The upper stator has a plurality of second blades arranged circumferentially inside, and the second blades are vertical flat plates. The length of the second blades extends along the vertical direction, and the width direction of the second blades is inclined relative to the radial direction of the upper stator. When the second blades extend from the end closer to the impeller to the end farther away from the impeller, their rotation is opposite to the rotation direction of the impeller. The lower stator has a plurality of third blades arranged circumferentially inside, and the third blades are vertical flat plates. The length of the third blades extends along the vertical direction, and the width of the third blades extends radially along the lower stator.

[0009] Furthermore, an active space is formed in the middle of the inner bottom of the separation box. The active space is used to accommodate the lower stator. An inclined plate is provided on the outside of the active space. The inclined plate gradually tilts upward from the active space toward the side wall of the separation box. Multiple fourth blades are fixedly provided on the inclined plate. The fourth blades are evenly distributed around the circumference of the lower stator, and the fourth blades correspond to the second and third blades distributed above and below.

[0010] Furthermore, both the upper and lower stators are circular rings, and the outer diameter of the upper stator is smaller than that of the lower stator. Multiple first springs are arranged circumferentially on the upper stator, and the first springs are connected to the upper part of the fourth blade. Multiple second springs are arranged circumferentially on the lower stator, and the second springs are connected to the lower part of the fourth blade. Both the first and second springs extend horizontally. In the initial state, the axes of the upper and lower stators, as well as the central axis, do not coincide, and the distance between the axis of the upper stator and the central axis is smaller than the distance between the axis of the lower stator and the central axis.

[0011] Furthermore, a second drive mechanism is provided at the bottom of the separation box, and a drive plate is provided in the active space. The second drive mechanism is in transmission cooperation with the drive plate, and the drive plate is in transmission cooperation with the upper stator and the lower stator at the same time. Thus, the second drive mechanism can drive the drive plate to rotate, thereby causing the axes of the upper stator and the lower stator to move synchronously around the central axis in the circumferential direction.

[0012] Furthermore, the upper stator further includes a first upper mounting ring and a first lower mounting ring arranged vertically, with the second blade located between the first upper mounting ring and the first lower mounting ring. A first driving ring is provided at the bottom of the first lower mounting ring, and a first annular groove is provided on the first driving ring. The first upper mounting ring, the first lower mounting ring, and the first annular groove are all coaxially arranged. The lower stator further includes a second upper mounting ring and a second lower mounting ring arranged vertically, with the third blade located between the second upper mounting ring and the second lower mounting ring. A second driving ring is provided at the bottom of the second lower mounting ring, and a second annular groove is provided on the second driving ring. The second upper mounting ring, the second lower mounting ring, and the second annular groove are all coaxially arranged. The drive plate is provided with a first cylinder and a second cylinder. The first cylinder is located in the first annular groove and can slide along the first annular groove, thereby causing the axis of the upper stator to move circumferentially around the central axis. The second cylinder is located in the second annular groove and can slide along the second annular groove, thereby causing the axis of the lower stator to move circumferentially around the central axis.

[0013] Furthermore, the top of the separation box is also provided with a scraping assembly, which is used to scrape off the phosphorus-containing foam on the surface of the slurry. The scraping assembly includes a third drive mechanism, a rotating shaft and a scraper. The rotating shaft extends in a horizontal direction and the scraper is fixedly mounted on the rotating shaft. The third drive mechanism drives the rotating shaft to rotate, so that the scraper can scrape the phosphorus-containing foam formed on the surface of the slurry to the outside of the separation box.

[0014] Furthermore, the vent pipe is integrally formed with a sleeve on the outside, and the sleeve is provided with a liquid inlet hole. The liquid inlet hole allows the slurry above the impeller to flow back to the center of the impeller. The bottom of the vent pipe is the air outlet end, and the air outlet end is provided with an exhaust hole. The exhaust hole is used to inject gas into the slurry. An air inlet pipe is provided above the vent pipe, and the air inlet pipe is used to guide external air into the vent pipe.

[0015] A high-efficiency phosphorus separation and recovery process, employing the aforementioned high-efficiency phosphorus separation device, includes the following steps:

[0016] S1. Inject the phosphorus-containing slurry into the separation box and start the first drive mechanism to make the central shaft drive multiple first blades to rotate synchronously.

[0017] S2. Gas is introduced into the center of multiple first blades through the vent pipe. The gas enters the slurry and disperses into bubbles.

[0018] S3. Start the second drive mechanism to drive the drive plate to rotate, so that the upper stator and the lower stator can move eccentrically in the circumferential direction synchronously.

[0019] S4. Start the third drive mechanism to drive the rotating shaft and scraper to rotate, scraping the phosphorus-containing foam formed on the surface of the slurry to the outside of the separation box, thereby completing the separation and recovery of phosphorus minerals.

[0020] The beneficial effects of this invention are:

[0021] The high-efficiency phosphorus separation device provided by the present invention firstly designs the upper half of the first blade as a vertical flat plate and the lower half as an arc-shaped plate. When the impeller rotates, it can generate centrifugal force to separate the slurry and push the bottom slurry upward through the arc-shaped plate, thereby promoting the circulation of the slurry and improving the phosphorus separation efficiency.

[0022] Secondly, the second blade of the upper stator is inclined, and when the second blade extends from the end near the impeller to the end away from the impeller, its rotation direction is opposite to the rotation direction of the impeller. This can effectively collide with the slurry containing small particles, thereby changing the flow direction of the slurry containing small particles, enhancing the combination of small particles and bubbles, and improving the separation effect of phosphorus.

[0023] Third, by setting both the upper and lower stators eccentrically relative to the impeller, and making the distance between the axis of the upper stator and the central axis smaller than that between the axis of the lower stator and the central axis, small particles in the slurry can enter the upper stator more quickly and thus are less likely to lose kinetic energy, thereby reducing the difficulty of small particles combining with bubbles. At the same time, the large distance between the lower stator and the impeller can increase the contact space between large particles and bubbles in the slurry, thereby improving the flotation effect on large particles.

[0024] Fourth, the second drive mechanism rotates the drive plate, causing the axes of the upper and lower stators to move synchronously around the central axis. This changes the eccentric position between the upper stator and the impeller, and between the lower stator and the impeller, resulting in periodic compression and release of the slurry. Consequently, the direction of the cutting force generated by the upper and lower stators continuously changes, increasing the agitation and dispersion of the slurry and thus improving phosphorus separation. Furthermore, different rotational speeds of the drive plate driven by the second drive motor also change the circumferential movement speed of the upper and lower stator axes around the central axis, thereby altering the rate of change of the cutting force generated by the upper and lower stators. Compared to existing technologies that only change the impeller speed, this approach can adapt to more complex slurry conditions. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of a high-efficiency phosphorus separation device provided in an embodiment of the present invention;

[0026] Figure 2 A cross-sectional schematic diagram of a high-efficiency phosphorus separation device provided in an embodiment of the present invention. Figure 1 ;

[0027] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;

[0028] Figure 4 A cross-sectional schematic diagram of a high-efficiency phosphorus separation device provided in an embodiment of the present invention. Figure 2 ;

[0029] Figure 5 for Figure 4 BB section view;

[0030] Figure 6 for Figure 4 CC section view;

[0031] Figure 7 This is an exploded view of the internal structure of a high-efficiency phosphorus separation device provided in an embodiment of the present invention;

[0032] Figure 8 This is a cross-sectional schematic diagram of the drive plate, inner stator, and outer stator in a high-efficiency phosphorus separation device provided in an embodiment of the present invention;

[0033] Figure 9 This is a cross-sectional schematic diagram of the air pipe, sleeve, and impeller in a high-efficiency phosphorus separation device provided in an embodiment of the present invention.

[0034] in:

[0035] 100. Separation box; 101. Vent pipe; 1011. Air inlet pipe; 1012. Exhaust port; 102. Central shaft; 103. Fixing frame; 104. First drive mechanism; 105. Crossbeam; 106. Feed inlet; 201. Fourth blade; 202. Impeller; 2021. First blade; 203. Upper stator; 2031. Second blade; 2032. First spring; 2033. First annular groove; 204. Lower stator; 2041. Third blade; 2042. Second spring; 2043. Second annular groove; 205. Sleeve; 2051. Liquid inlet; 206. Drive plate; 2061. First cylinder; 2062. Second cylinder; 207. Second drive mechanism; 301. Third drive mechanism; 302. Rotating shaft; 303. Scraper. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0037] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] like Figures 1 to 9As shown, an embodiment of the present invention provides a high-efficiency phosphorus separation device, including a separation box 100, an impeller 202, a stator, a vent pipe 101, and a first drive mechanism 104. The separation box 100 is used to contain slurry. The impeller 202 has a central shaft 102 extending in the vertical direction and a plurality of first blades 2021 evenly distributed around the central shaft 102. The width of the first blades 2021 extends radially along the central shaft 102, and the length of the first blades 2021 extends in the vertical direction. The first blades 2021 are divided into an upper part and a lower part in the vertical direction. The upper part is a vertical flat plate, and the lower part is an arc-shaped plate. The plate gradually bends horizontally from top to bottom; the stator is sleeved on the outside of the impeller 202, and the stator is used to disperse the slurry after centrifugation by the first blade 2021; the vent pipe 101 is coaxially sleeved on the outside of the central shaft 102 and located at the center of the multiple first blades 2021, and the vent pipe 101 is used to introduce external gas into the center of the multiple first blades 2021; the first drive mechanism 104 is set on the top of the separation box 100 and is connected to the central shaft 102 for transmission. The first drive mechanism 104 drives the multiple first blades 2021 to rotate synchronously through the central shaft 102, so that the arc plate can push the slurry at the bottom of the separation box 100 to flow upward.

[0040] The separation box 100 has a feed inlet 106 on its side wall and a crossbeam 105 on its top. A fixing frame 103 is provided on the crossbeam 105 and the vent pipe 101 is installed on the fixing frame 103.

[0041] A first circular plate is provided above the multiple first blades 2021, and a second circular plate is provided below the multiple first blades 2021. The diameter of the first circular plate is larger than the diameter of the second circular plate. A perforation is provided in the center of the first circular plate, and the vent pipe 101 passes through the perforation and is fixedly connected to the center of the second circular plate.

[0042] By designing the upper half of the first blade 2021 as a vertical flat plate and the lower half as an arc-shaped plate, the impeller 202 can generate centrifugal force to separate the slurry when it rotates, and can also push the bottom slurry upward through the arc-shaped plate, thereby promoting the circulation of the slurry and improving the separation efficiency of phosphorus.

[0043] Furthermore, the width of the first blade 2021 gradually decreases from top to bottom.

[0044] In this way, the slurry can move obliquely upward under the rotation of impeller 202, thereby expanding the flotation mixing zone and extending the mixing time of slurry, bubbles, and reagents, thus improving the flotation efficiency of phosphorus. At the same time, because the small particles in the slurry have a small mass, they easily rise to the upper part of the first blade 2021. The upper part of the first blade 2021 will generate a large linear velocity, thereby increasing the collision force between small particles in the slurry and bubbles, ensuring the flotation effect of small particles in the slurry.

[0045] Furthermore, the stator includes an inner stator, which comprises an upper stator 203 and a lower stator 204 arranged sequentially in a vertical direction. The axes of both the upper stator 203 and the lower stator 204 extend in a vertical direction, and both are sleeved on the outside of the impeller 202. The upper stator 203 corresponds to the upper half of the first blade 2021, and the lower stator 204 corresponds to the lower half of the first blade 2021. The upper stator 203 has a plurality of second blades 2031 arranged circumferentially inside, and each second blade 2031 is a vertical flat plate. The length of the second blade 2031 extends in the vertical direction, and the width direction of the second blade 2031 is inclined relative to the radial direction of the upper stator 203. When the second blade 2031 extends from the end near the impeller 202 to the end away from the impeller 202, its rotation direction is opposite to the rotation direction of the impeller 202. The lower stator 204 has a plurality of third blades 2041 arranged circumferentially inside. The third blades 2041 are vertical flat plates. The length of the third blades 2041 extends in the vertical direction, and the width of the third blades 2041 extends radially along the lower stator 204.

[0046] The second blade 2031 of the upper stator 203 is inclined, and when it extends from the end near the impeller 202 to the end away from the impeller 202, its rotation direction is opposite to that of the impeller 202. This allows it to effectively collide with the slurry containing small particles, thereby changing the flow direction of the slurry and increasing the probability of small particles combining with air bubbles, thus improving the phosphorus separation effect. The third blade 2041 of the lower stator 204 extends radially, further cutting the centrifugally rotating slurry in the lower half of the first blade 2021, improving the dispersion of the slurry, and thus enhancing the phosphorus separation effect.

[0047] Furthermore, an active space is formed in the middle of the inner bottom of the separation box 100. The active space is used to accommodate the lower stator 204. An inclined plate is provided on the outside of the active space. The inclined plate gradually slopes upward from the active space toward the side wall of the separation box 100. A plurality of fourth blades 201 are fixedly provided on the inclined plate. The fourth blades 201 are evenly distributed around the circumference of the lower stator 204, and the fourth blades 201 correspond to the second blades 2031 and the third blades 2041 distributed vertically.

[0048] The inclined plate at the bottom of the separation box 100, with a fourth blade 201 on it, can restrict the rotation of the slurry and promote the rise of adsorbed bubbles in the slurry, thereby preventing particle deposition and promoting the separation of phosphorus.

[0049] Furthermore, both the upper stator 203 and the lower stator 204 are annular, and the outer diameter of the upper stator 203 is smaller than that of the lower stator 204. Multiple first springs 2032 are provided circumferentially on the upper stator 203, and the first springs 2032 are connected to the upper part of the fourth blade 201. Multiple second springs 2042 are provided circumferentially on the lower stator 204, and the second springs 2042 are connected to the lower part of the fourth blade 201. Both the first springs 2032 and the second springs 2042 extend horizontally. In the initial state, the axes of the upper stator 203, the lower stator 204, and the central axis 102 do not coincide, and the distance between the axis of the upper stator 203 and the central axis 102 is smaller than the distance between the axis of the lower stator 204 and the central axis 102.

[0050] Because small particles in the slurry have a small mass, they easily lose kinetic energy after being thrown out from the upper part of the first blade 2021, while large particles in the slurry have a large mass and do not easily lose kinetic energy after being thrown out from the lower part of the first blade 2021. By setting the upper stator 203 and lower stator 204 eccentrically relative to the impeller 202, and making the distance between the axis of the upper stator 203 and the central axis 102 smaller than the distance between the axis of the lower stator 204 and the central axis 102, it is possible to promote the entry of small particles in the slurry into the upper stator 203 as quickly as possible, thus making it less likely to lose kinetic energy. This reduces the difficulty of small particles combining with air bubbles. At the same time, the larger distance between the lower stator 204 and the impeller 202 increases the contact space between large particles in the slurry and air bubbles, improving the flotation effect for large particles.

[0051] In addition, the first spring 2032 and the second spring 2042 enable the upper stator 203 and the lower stator 204 to generate a certain elastic sway under the impact of the slurry, which enhances the cutting and disturbance effect on the slurry, avoids local accumulation of slurry, and improves the separation efficiency of phosphorus.

[0052] Furthermore, a second drive mechanism 207 is provided at the bottom of the separation box 100, and a drive plate 206 is provided in the active space. The second drive mechanism 207 is in transmission cooperation with the drive plate 206, and the drive plate 206 is in transmission cooperation with the upper stator 203 and the lower stator 204 at the same time. Thus, the second drive mechanism 207 can drive the drive plate 206 to rotate, thereby causing the axis of the upper stator 203 and the axis of the lower stator 204 to move synchronously around the central axis 102 in the circumferential direction.

[0053] The second drive mechanism 207 drives the drive plate 206 to rotate, causing the axes of the upper stator 203 and the lower stator 204 to move synchronously around the central axis 102. This changes the eccentric position between the upper stator 203 and the impeller 202, and between the lower stator 204 and the impeller 202, resulting in periodic compression and release of the slurry. Consequently, the direction of the cutting force generated by the upper stator 203 and the lower stator 204 continuously changes, increasing the agitation and dispersion of the slurry and thus improving the phosphorus separation effect. Furthermore, different rotational speeds of the drive plate 206 driven by the second drive motor will also change the speed at which the axes of the upper stator 203 and the lower stator 204 move around the central axis 102. This, in turn, changes the speed of change in the direction of the cutting force generated by the upper stator 203 and the lower stator 204. Compared to existing technologies that only change the rotational speed of the impeller 202, this method can adapt to more complex slurry conditions.

[0054] Furthermore, the upper stator 203 further includes a first upper mounting ring and a first lower mounting ring arranged vertically, with the second blade 2031 located between the first upper mounting ring and the first lower mounting ring. The bottom of the first lower mounting ring is provided with a first driving ring, and the first driving ring is provided with a first ring groove 2033. The first upper mounting ring, the first lower mounting ring, and the first ring groove 2033 are all coaxially arranged. The lower stator 204 further includes a second upper mounting ring and a second lower mounting ring arranged vertically, with the third blade 2041 located between the second upper mounting ring and the second lower mounting ring. The bottom of the second lower mounting ring is provided with a first driving ring. A second drive ring is provided, and a second annular groove 2043 is provided on the second drive ring. The second upper mounting ring, the second lower mounting ring, and the second annular groove 2043 are all coaxially arranged. The drive plate 206 is provided with a first cylinder 2061 and a second cylinder 2062. The first cylinder 2061 is located in the first annular groove 2033 and can slide along the first annular groove 2033, thereby causing the axis of the upper stator 203 to move circumferentially around the central axis 102. The second cylinder 2062 is located in the second annular groove 2043 and can slide along the second annular groove 2043, thereby causing the axis of the lower stator 204 to move circumferentially around the central axis 102.

[0055] The movement of the upper stator 203 and the lower stator 204 is made more stable and reliable by the sliding of the first cylinder 2061 along the first annular groove 2033 and the sliding of the second cylinder 2062 along the second annular groove 2043, ensuring a continuous and stable disturbance effect on the slurry, thereby improving the separation efficiency of the high-efficiency phosphorus separation device.

[0056] Furthermore, the top of the separation box 100 is also provided with a scraping assembly, which is used to scrape off the phosphorus-containing foam on the surface of the slurry. The scraping assembly includes a third drive mechanism 301, a rotating shaft 302 and a scraper 303. The rotating shaft 302 extends in the horizontal direction, and the scraper 303 is fixedly mounted on the rotating shaft 302. The third drive mechanism 301 drives the rotating shaft 302 to rotate, so that the scraper 303 can scrape the phosphorus-containing foam formed on the surface of the slurry to the outside of the separation box 100.

[0057] The scraping component promptly scrapes the phosphorus-containing foam formed on the surface of the slurry out of the separation box 100, which can prevent the foam from being re-mixed into the slurry.

[0058] Furthermore, the vent pipe 101 is integrally formed with a sleeve 205, and the sleeve 205 is provided with a liquid inlet hole 2051. The liquid inlet hole 2051 allows the slurry above the impeller 202 to flow back to the center of the impeller 202. The bottom of the vent pipe 101 is the air outlet end, and the air outlet end is provided with an exhaust hole 1012. The exhaust hole 1012 is used to inject gas into the slurry. The vent pipe 1011 is provided above the vent pipe 101, and the air inlet pipe 1011 is used to guide external air into the vent pipe 101.

[0059] The liquid inlet 2051 allows the slurry above the impeller 202 to flow back to the center, forming an internal circulation in the slurry and improving the slurry utilization rate.

[0060] The first drive mechanism 104, the second drive mechanism 207 and the third drive mechanism 301 are all drive motors.

[0061] Based on the above embodiments, the usage principle and working process of the present invention are as follows:

[0062] Slurry and reagents are injected into the separation box 100 through the feed inlet 106, and gas is introduced into the vent pipe 101 through the air inlet pipe 1011. Then, the first drive mechanism 104, the second drive mechanism 207 and the third drive mechanism 301 are started simultaneously.

[0063] The first drive mechanism 104 drives the central shaft 102 of the impeller 202 to rotate, causing multiple first blades 2021 to rotate synchronously. A negative pressure is generated at the center of the multiple first blades 2021, thereby drawing in the gas from the vent pipe 101. The gas then enters the slurry through the exhaust port 1012 and disperses into bubbles. At the same time, the rotation of the impeller 202 causes the slurry inside the separation box 100 to rotate with the first blades 2021. The rotation of the vertical plate of the upper part of the first blade 2021 generates centrifugal force, which can quickly throw the slurry containing small particles into the upper stator 203. Then, the slurry is cut and collided by the second blades 2031 in the upper stator 203, so that the small particles in the slurry are fully combined with the bubbles and reagents. The lower arc-shaped plate rotates with the impeller 202, which can push the slurry at the bottom of the separation box 100 upward, promote the upward flow of the slurry, reduce the deposition of large particles in the slurry, and the lower arc-shaped plate can throw the slurry containing large particles into the lower stator 204, where it is cut and collided by the third blade 2041 in the lower stator 204.

[0064] Because the second drive mechanism 207 causes the axes of the upper stator 203 and the lower stator 204 to move synchronously around the central shaft 102, and under the stirring motion of the impeller 202, large and small particles in the slurry fully contact and combine with bubbles and reagents, and aggregate to form phosphorus-containing foam. Finally, the phosphorus-containing foam enters the fourth blade 201, thereby stopping rotation and gradually rising.

[0065] As the phosphorus-containing foam on the surface of the slurry accumulates to a certain extent, the third drive mechanism 301 drives the rotating shaft 302 to rotate, causing the scraper 303 to scrape the phosphorus-containing foam to the outside of the separation box 100, thus completing the separation and collection of phosphorus.

[0066] This invention also provides a high-efficiency phosphorus separation and recovery process, employing the above-mentioned high-efficiency phosphorus separation device, comprising the following steps:

[0067] S1. Inject the phosphorus-containing slurry into the separation box 100, and start the first drive mechanism 104 to make the central shaft 102 drive multiple first blades 2021 to rotate synchronously.

[0068] S2. Gas is introduced into the center of multiple first blades 2021 through the vent pipe 101. The gas enters the slurry and disperses into bubbles.

[0069] S3. Start the second drive mechanism 207 to drive the drive plate 206 to rotate, so that the axis of the upper stator 203 and the axis of the lower stator 204 move synchronously around the central axis 102 in the circumferential direction.

[0070] S4. Start the third drive mechanism 301 to drive the rotating shaft 302 and scraper 303 to rotate, scraping the phosphorus-containing foam formed on the surface of the slurry to the outside of the separation box 100, thereby completing the separation and recovery of phosphorus minerals.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A phosphorus efficient separation device, characterized by, The utility model relates to a kind of separation tank and its driving mechanism, including: Separation tank, the inside of separation tank is used to hold ore pulp; Impeller, the impeller has center axis extending along up-down direction and multiple first blades being evenly distributed around center axis, the width of first blade extends along radial direction of center axis, the length of first blade extends along up-down direction, first blade is sequentially divided into upper half and lower half along up-down direction, the upper half is vertical plate, the lower half is arc plate, arc plate gradually bends towards horizontal direction from top to bottom; Stator, the stator is sleeved on the outside of impeller, and stator is used to disperse ore pulp after centrifugation of first blade; Ventilation pipe, the ventilation pipe is coaxially sleeved on the outside of center axis and located at the center position of multiple first blades, and ventilation pipe is used to pass gas outside into the center position of multiple first blades; First driving mechanism, the first driving mechanism is arranged at the top of separation tank and is drivingly connected with center axis, and first driving mechanism drives multiple first blades to rotate synchronously by center axis, so that arc plate can push ore pulp at the bottom of separation tank to flow upwards; The stator includes inner stator, the inner stator includes upper stator and lower stator sequentially distributed along up-down direction, the axis of upper stator and lower stator all extend along up-down direction, and upper stator and lower stator are all sleeved on the outside of impeller, and upper stator corresponds with the upper half of first blade, and lower stator corresponds with the lower half of first blade; The inside of the upper stator is provided with multiple second blades around the circumference, and the second blade is a vertical plate;The length of the second blade extends along the up-down direction, and the width direction of the second blade is inclined relative to the radial direction of the upper stator, and when the second blade extends from the end close to the impeller to the end away from the impeller, the rotation direction of the second blade is opposite to the rotation direction of the impeller;The inside of the lower stator is provided with multiple third blades around the circumference, and the third blade is a vertical plate, the length of the third blade extends along the up-down direction, and the width of the third blade extends along the radial direction of the lower stator.

2. The phosphorus efficient separation device according to claim 1, characterized in that The width of the first blade gradually decreases from top to bottom.

3. The phosphorus efficient separation device of claim 1, wherein, The inner bottom of the separation tank forms a moving space in the middle, the moving space is used to accommodate the lower stator, the outside of the moving space is provided with an inclined plate, the inclined plate gradually inclines upwards from the moving space to the side wall of the separation tank, a plurality of fourth blades are fixedly arranged on the inclined plate, the fourth blades are evenly distributed around the circumference of the lower stator, and the fourth blades correspond to the second blades and the third blades distributed above and below at the same time.

4. The phosphorus efficient separation device of claim 3, wherein, The upper stator and the lower stator are both circular rings, and the outer diameter of the upper stator is smaller than the outer diameter of the lower stator, a plurality of first springs are arranged on the circumference of the upper stator, the first springs are connected above the fourth blades, a plurality of second springs are arranged on the circumference of the lower stator, the second springs are connected below the fourth blades, and the first springs and the second springs both extend along the horizontal direction;In the initial state, the axis of the upper stator, the axis of the lower stator and the center axis are all not coincident, and the distance between the axis of the upper stator and the center axis is smaller than the distance between the axis of the lower stator and the center axis.

5. The phosphorus efficient separation device of claim 4, wherein, The bottom of the separation tank is provided with a second driving mechanism, the active space is provided with a driving plate, the second driving mechanism is in transmission cooperation with the driving plate, the driving plate is in transmission cooperation with the upper stator and the lower stator at the same time, so that the second driving mechanism can drive the driving plate to rotate, and then the axis of the upper stator and the axis of the lower stator are synchronously moved around the circumference of the central shaft.

6. The phosphorus-efficient separation device of claim 5, wherein, The upper stator further comprises a first upper mounting ring and a first lower mounting ring which are arranged in sequence from top to bottom, the second blade is located between the first upper mounting ring and the first lower mounting ring, the bottom of the first lower mounting ring is provided with a first driving ring, the first driving ring is provided with a first ring groove, and the first upper mounting ring, the first lower mounting ring and the first ring groove are coaxially arranged; The lower stator further comprises a second upper mounting ring and a second lower mounting ring which are arranged in sequence from top to bottom, the third blade is located between the second upper mounting ring and the second lower mounting ring, the bottom of the second lower mounting ring is provided with a second driving ring, the second driving ring is provided with a second ring groove, and the second upper mounting ring, the second lower mounting ring and the second ring groove are coaxially arranged; The driving plate is provided with a first cylinder and a second cylinder, the first cylinder is located in the first ring groove and can slide along the first ring groove, so that the axis of the upper stator is moved around the circumference of the central shaft, and the second cylinder is located in the second ring groove and can slide along the second ring groove, so that the axis of the lower stator is moved around the circumference of the central shaft.

7. The phosphorus-efficient separation device of claim 6, wherein, The top of the separation tank is further provided with a scraping assembly, the scraping assembly is used for scraping the phosphorus-containing foam on the surface of the ore pulp, the scraping assembly comprises a third driving mechanism, a rotating shaft and a scraper plate, the rotating shaft extends in the horizontal direction, the scraper plate is fixedly arranged on the rotating shaft, the third driving mechanism drives the rotating shaft to rotate, so that the scraper plate can scrape the phosphorus-containing foam formed on the surface of the ore pulp to the outside of the separation tank.

8. The phosphorus efficient separation device of claim 1, wherein, The outer part of the air pipe is integrally formed with a sleeve, the sleeve is provided with a liquid inlet hole, the liquid inlet hole enables the ore pulp above the impeller to flow back to the center position of the impeller, the bottom of the air pipe is an air outlet end, the air outlet end is provided with an air outlet hole, the air outlet hole is used for injecting gas into the ore pulp, and the upper part of the air pipe is provided with an air inlet pipe, the air inlet pipe is used for guiding external air into the air pipe.

9. A phosphorus efficient separation recovery process, characterized by, The phosphorus-efficient separation device of claim 7 comprises the following steps: S1, injecting the ore pulp containing phosphorus into the separation tank, and starting the first driving mechanism to drive the central shaft to synchronously rotate the plurality of first blades; S2, introducing gas into the center position of the plurality of first blades through the air pipe, the gas enters the ore pulp and disperses into bubbles; S3, starting the second driving mechanism to drive the driving plate to rotate, so that the axis of the upper stator and the axis of the lower stator are synchronously moved around the circumference of the central shaft; S4, starting the third driving mechanism to drive the rotating shaft and the scraper plate to rotate, scraping the phosphorus-containing foam formed on the surface of the ore pulp to the outside of the separation tank, thereby completing the separation and recovery of the phosphorus minerals.

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