A screening device for phosphate ore beneficiation

Abstract

This application provides a screening device for phosphate ore beneficiation, relating to the field of phosphate ore screening technology. It includes a housing, a first crushing component, a vibrating screening component, a second crushing component, and a rotary conveyor component. This invention replaces the existing methods of rotating unqualified ore using inclined chutes, belt conveyors, or screw conveyors by connecting the rotary conveyor component with the second crushing component and the vibrating screening component. This effectively solves problems such as chute bridging and blockage, belt slippage and material slippage, and screw conveyor jamming that easily occur during the conveying of lumpy unqualified ore. It also avoids interruptions or slow conveying speeds. Simultaneously, the closed-loop crushing and screening process shortens the operation cycle, improves overall beneficiation efficiency, and can adapt to the continuous operation requirements of large-scale phosphate ore beneficiation production lines. It reduces the amount of auxiliary work such as manual picking and resetting, and downtime cleaning, lowering equipment maintenance costs and ensuring the stability and continuity of phosphate ore beneficiation operations.

Description

Technical Field

[0001] This application relates to the field of phosphate rock screening technology, and more specifically, to a screening device for phosphate rock beneficiation. Background Technology

[0002] Phosphate rock, as an important chemical raw material, is widely used in fertilizer production, chemical product synthesis, and other fields. In its beneficiation process, screening is a crucial pretreatment step. Its purpose is to classify the mined phosphate ore according to particle size, screening out qualified ore that meets the requirements of subsequent flotation, gravity separation, and other separation processes, while separating out unqualified ore with excessive particle size. Because raw phosphate ore often suffers from agglomeration and uneven particle size, a single crushing process is insufficient to meet the precise particle size requirements of the separation process. Therefore, the industry commonly adopts a cyclical process of "crushing-screening-recycled crushing of unqualified ore," where unqualified ore separated by the screening device needs to be re-transported to the crushing mechanism for secondary or even multiple crushing operations until it reaches the preset particle size standard.

[0003] In existing technologies, substandard minerals separated by screening devices are typically returned to the crushing mechanism via inclined chutes, belt conveyors, or screw conveyors. Since these substandard minerals are mostly large-sized lumps, chutes are prone to blockage, belt slippage, or screw conveyor jamming during transport. For example, such materials easily form a "bridging" phenomenon at chute bends and narrow outlet sections—lumps support each other and get stuck in the channel, leading to continuous accumulation and eventually blockage of the entire conveying channel. When using belt conveyors, lumps are prone to rolling and shifting due to unstable center of gravity; some lumps may even slip off the belt edge, requiring frequent manual pickup and repositioning. Simultaneously, the pressure of the lumps on the belt is concentrated in a localized area, easily causing localized belt sinking, slippage, and affecting the smoothness of belt operation. Furthermore, the clearance between the screw blades and the casing of a screw conveyor is usually small; lumps entering the conveyor can easily get stuck between the blades and the casing, directly causing the screw shaft to jam and forcing the conveyor equipment to stop for cleaning.

[0004] The occurrence of the above phenomena leads to interruption or slow conveying of ore, prolonging the cycle of "crushing-screening-rotary crushing" and reducing the overall beneficiation efficiency. Especially in large-scale phosphate ore beneficiation production lines, this problem will result in insufficient equipment processing capacity, making it difficult to match the continuous operation requirements of raw ore mining. Summary of the Invention

[0005] The purpose of this application is to provide a screening device for phosphate ore beneficiation, which can solve the technical problems mentioned in the background art.

[0006] This application provides a screening device for phosphate ore beneficiation, comprising:

[0007] The box body is divided into a crushing chamber, a screening chamber and a rotary conveying chamber. The discharge end of the crushing chamber is connected to the feed end of the screening chamber. The discharge end of the screening chamber is connected to the feed end of the rotary conveying chamber. The top of the box body is provided with a first feed inlet connected to the crushing chamber, and the bottom of the box body is provided with a discharge outlet connected to the screening chamber.

[0008] The first crushing component is fixed inside the crushing chamber and is used to perform initial crushing on the phosphate mineral material entering the crushing chamber.

[0009] A vibrating screen assembly is assembled in the screening chamber and is used to classify and screen the phosphate mineral material after primary crushing to separate qualified and unqualified products.

[0010] The second crushing component is installed inside the screening chamber and is located above the vibrating screen component, and is used to perform secondary crushing on unqualified phosphate mineral materials.

[0011] A rotary conveyor assembly is provided, corresponding to the rotary conveying chamber. The feed end of the rotary conveyor assembly is connected to the non-conforming product discharge end of the screening chamber, and the discharge end of the rotary conveyor assembly is connected to the feed end of the second crushing assembly. The rotary conveyor assembly is used to convey the non-conforming products screened by the vibrating screening assembly to the second crushing assembly. After secondary crushing by the second crushing assembly, the material falls back to the vibrating screening assembly for screening again.

[0012] Furthermore, the first crushing assembly includes a first crushing roller, a second crushing roller, a first drive motor, and a second drive motor. The first crushing roller and the second crushing roller are rotatably disposed within the crushing chamber. The first crushing roller and the second crushing roller are arranged in parallel. The first drive motor and the second drive motor are fixed outside the housing. One end of the first crushing roller extends outside the housing and is connected to the output shaft of the first drive motor. One end of the second crushing roller extends outside the housing and is connected to the output shaft of the second drive motor.

[0013] Furthermore, a first guide plate and a second guide plate are symmetrically fixed above the first crushing component in the crushing chamber, and the first guide plate and the second guide plate are arranged in an inverted V-shape.

[0014] Furthermore, the vibrating screening assembly includes a screening frame, a screening screen, and a vibrating motor. The screening frame is inclinedly arranged in the screening chamber. Guide rods are fixed at the four corners of the bottom of the screening frame. Support blocks corresponding to the guide rods are fixed in the screening chamber. The middle of the support block is provided with a guide hole adapted to the corresponding guide rod. The guide rod moves through the corresponding guide hole. An anti-detachment block is fixed at the bottom of the guide rod. A spring is sleeved on the guide rod. The spring is located between the top of the support block and the bottom of the screening frame. The screening screen is fixed on the screening frame. The vibrating motor is fixed at the bottom of the screening frame. The lower end of the screening frame extends to the feed end of the rotary conveying chamber.

[0015] Furthermore, the second crushing assembly includes a third guide plate, a crushing plate, a drive cylinder, and a transmission rod. The third guide plate is inclinedly fixed in the screening chamber, located above the screening frame, with its lower end above the upper end of the screening frame. The upper end of the third guide plate is connected to the discharge end of the rotary conveying chamber. The crushing plate is inclinedly positioned above the third guide plate, with a crushing shaft fixed at its upper end. The crushing shaft is rotatably positioned in the screening chamber. A guide ring with a strip-shaped hole is fixed on the side of the crushing plate away from the third guide plate. The transmission rod is slidably positioned within the guide ring, with one side of the transmission rod fixedly connected to the output shaft of the drive cylinder. The fixed end of the drive cylinder is hinged in the screening chamber via a hinge seat.

[0016] Furthermore, the crushing plate is uniformly provided with crushing teeth on the side near the third guide plate.

[0017] Furthermore, there are two guide rings, which are symmetrically arranged. The transmission rod is slidably disposed within the two guide rings, and the middle part of the transmission rod is connected to the output shaft of the drive cylinder.

[0018] Furthermore, the rotary conveying assembly includes a first rotating shaft, a second rotating shaft, a conveyor belt, and a conveyor motor. The first rotating shaft and the second rotating shaft are rotatably disposed within the rotary conveying cavity. The first rotating shaft is located directly above the second rotating shaft. The conveyor belt is sleeved on the first rotating shaft and the second rotating shaft. Multiple conveying plates are uniformly fixed on the outer side of the conveyor belt. The conveyor motor is fixed on the outer side of the housing. One end of the first rotating shaft extends out of the housing and is connected to the output shaft of the conveyor motor.

[0019] Furthermore, the top of the box is provided with a second feed inlet that communicates with the screening chamber, and the second feed inlet is located above the upper end of the third guide plate.

[0020] Furthermore, a baffle assembly is provided at the second feed inlet. The baffle assembly includes a baffle plate and a baffle cylinder. The housing is provided with a receiving cavity. The baffle cylinder is fixed in the receiving cavity. The baffle plate is movably disposed in the receiving cavity. The telescopic end of the baffle cylinder is fixedly connected to the baffle plate. After the baffle cylinder drives the baffle plate to extend out of the receiving cavity, it can block the second feed inlet.

[0021] The beneficial effects of this invention are:

[0022] This invention replaces the existing methods of rotating unqualified ore using inclined chutes, belt conveyors, or screw conveyors by connecting the rotary conveyor assembly with the second crushing assembly and the vibrating screening assembly. This effectively solves problems such as chute bridging and blockage, belt slippage and material slippage, and screw conveyor jamming that easily occur during the transportation of lumpy unqualified ore. It also avoids interruptions or slow transportation speeds. At the same time, the closed-loop crushing and screening process shortens the operation cycle, improves the overall mineral processing efficiency, and can adapt to the continuous operation requirements of large-scale phosphate ore beneficiation production lines. It reduces the amount of auxiliary work such as manual picking and resetting, and downtime cleaning, lowers equipment maintenance costs, ensures the matching degree between equipment processing capacity and the continuous operation requirements of raw ore mining, and ensures the stability and continuity of phosphate ore beneficiation operations. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 These are schematic diagrams of structures in some embodiments of this application;

[0025] Figure 2 These are cross-sectional views of some embodiments of this application;

[0026] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0027] The reference numerals in the attached figures are as follows:

[0028] 1. Housing; 11. Crushing chamber; 12. Screening chamber; 13. Rotary conveying chamber; 14. First feed inlet; 15. Discharge outlet; 16. Second feed inlet; 17. Receiving chamber; 2. First crushing assembly; 21. First crushing roller; 22. Second crushing roller; 23. First drive motor; 24. Second drive motor; 3. Vibrating screen assembly; 31. Screening frame; 311. Guide rod; 312. Support block; 313. Anti-detachment block; 314. Spring; 32. Screening mesh; 33. 1. Vibrating motor; 4. Second crushing assembly; 41. Third guide plate; 42. Crushing plate; 421. Crushing shaft; 422. Guide ring; 423. Crushing teeth; 43. Drive cylinder; 44. Transmission rod; 5. Rotary conveyor assembly; 51. First shaft; 52. Second shaft; 53. Conveyor belt; 531. Conveyor plate; 54. Conveyor motor; 6. First guide plate; 7. Second guide plate; 8. Hinge seat; 9. Baffle assembly; 91. Baffle plate; 92. Baffle cylinder. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and 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 a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific Implementation

[0035] In existing technologies, the unqualified mineral materials separated by screening devices are mostly large-sized lumpy materials. These materials are prone to "bridging" at chute bends and narrow outlet sections—the lumpy mineral materials support each other and get stuck in the channel, causing subsequent mineral materials to accumulate and eventually block the entire conveying channel. On belt conveyors, lumpy mineral materials are prone to rolling and shifting due to unstable center of gravity, and some lumpy mineral materials may even slip off the edge of the belt, requiring frequent manual picking and repositioning. At the same time, the pressure of lumpy mineral materials on the belt is concentrated in a local area, which can easily cause the belt to sink locally, affecting the stability of the belt operation. Furthermore, the gap between the helical blades and the casing of screw conveyors is usually small. After lumpy mineral materials enter, they are easy to get stuck between the blades and the casing, directly causing the screw shaft to jam and forcing the conveying equipment to stop for cleaning.

[0036] like Figure 1-3As shown, this application provides a screening device for phosphate ore beneficiation, including a housing 1, a first crushing component 2, a vibrating screening component 3, a second crushing component 4, and a rotary conveying component 5. The housing 1 is divided into a crushing chamber 11, a screening chamber 12, and a rotary conveying chamber 13. The discharge end of the crushing chamber 11 is connected to the feed end of the screening chamber 12, and the discharge end of the screening chamber 12 (for defective products) is connected to the feed end of the rotary conveying chamber 13. The top of the housing 1 has a first feed inlet 14 connected to the crushing chamber 11, and the bottom of the housing 1 has a discharge outlet 15 connected to the screening chamber 12. The first crushing component 2 is fixed inside the crushing chamber 11 and is used to crush the phosphate ore entering the crushing chamber 11. The primary crushing process involves a vibrating screen assembly 3 installed within the screening chamber 12 to classify and screen the phosphate rock material after primary crushing, separating qualified and unqualified products. A second crushing assembly 4 is installed within the screening chamber 12, positioned above the vibrating screen assembly 3, and is used for secondary crushing of the unqualified phosphate rock material. A rotary conveyor assembly 5 is positioned corresponding to the rotary conveyor chamber 13, with its feed end connected to the unqualified product discharge end of the screening chamber 12, and its discharge end connected to the feed end of the second crushing assembly 4. The rotary conveyor assembly 5 transports the unqualified products screened by the vibrating screen assembly 3 to the second crushing assembly 4 for further crushing. The material after secondary crushing by the second crushing component 4 falls back to the vibrating screen component 3 for further screening. Specifically, the phosphate mineral material enters the crushing chamber 11 through the first feed inlet 14 and is initially crushed by the first crushing component 2. The material after the initial crushing enters the screening chamber 12, which is connected to the crushing chamber 11. The vibrating screen component 3, installed in the screening chamber 12, performs grading and screening of the phosphate mineral material, separating qualified and unqualified products. Qualified products are discharged through the discharge outlet 15 at the bottom of the housing 1, which is connected to the screening chamber 12. Unqualified products enter the rotary conveyor chamber 13 through the unqualified product discharge end of the screening chamber 12. The rotary conveyor component 5 is used to transport the unqualified products to the vibrating screen component 3. The material after secondary crushing by the second crushing component 4 falls back to the vibrating screen component 3 for further grading and screening, forming a closed-loop operation process of "primary crushing - screening - non-conforming product return - secondary crushing - re-screening". By connecting the rotary conveyor component 5 with the second crushing component 4 and the vibrating screen component 3, the non-conforming material return method of the existing inclined chute, belt conveyor or screw conveyor is replaced, which effectively solves the problems of chute "bridging" blockage, belt slippage and material slippage, screw conveyor jamming that are prone to occur during the transportation of blocky non-conforming materials, and avoids the occurrence of material transportation interruption or slow transportation speed.Meanwhile, the closed-loop crushing and screening process shortens the operation cycle, improves overall mineral processing efficiency, and can adapt to the continuous operation requirements of large-scale phosphate ore beneficiation production lines. It reduces auxiliary operations such as manual picking and resetting, and downtime cleaning, lowers equipment maintenance costs, ensures the matching degree between equipment throughput and the continuous operation requirements of raw ore mining, and guarantees the stability and continuity of phosphate ore beneficiation operations.

[0037] like Figure 1 and Figure 2 As shown, the first crushing assembly 2 includes a first crushing roller 21, a second crushing roller 22, a first drive motor 23, and a second drive motor 24. The first crushing roller 21 and the second crushing roller 22 are rotatably disposed within the crushing chamber 11, and are arranged in parallel. The first drive motor 23 and the second drive motor 24 are fixed outside the housing 1. One end of the first crushing roller 21 extends outside the housing 1 and is connected to the output shaft of the first drive motor 23, and one end of the second crushing roller 22 extends outside the housing 1 and is connected to the output shaft of the second drive motor 24. Both the first crushing roller 21 and the second crushing roller 22 are equipped with crushing teeth. The crushing teeth on the first crushing roller 21 and the second crushing roller 22 have a complementary and compatible structure and are arranged in a staggered manner along the axial and circumferential directions of the roller body. When the first crushing component 2 is working, the first drive motor 23 and the second drive motor 24 start synchronously and drive the first crushing roller 21 and the second crushing roller 22 to rotate respectively. The shearing action of the first crushing roller 21 and the second crushing roller 22 completes the initial crushing of the phosphate mineral material entering the crushing chamber 11, providing pre-treated material that meets the particle size requirements for subsequent vibrating screening operations.

[0038] like Figure 2 As shown, a first guide plate 6 and a second guide plate 7 are symmetrically fixed above the first crushing component 2 inside the crushing chamber 11. The first guide plate 6 and the second guide plate 7 are arranged in an inverted V-shape. The symmetrically arranged inverted V-shape of the first guide plate 6 and the second guide plate 7 can effectively prevent phosphate minerals from scattering and accumulating on the side wall of the crushing chamber 11 or the outside of the first crushing component 2 after entering the crushing chamber 11, ensuring that all materials fall into the crushing area of ​​the first crushing roller 21 and the second crushing roller 22, thereby improving material utilization and crushing efficiency.

[0039] like Figure 2As shown, the vibrating screening assembly 3 includes a screening frame 31, a screening screen 32, and a vibrating motor 33. The screening frame 31 is inclinedly arranged in the screening chamber 12. Guide rods 311 are fixed at the four corners of the bottom of the screening frame 31. Support blocks 312 corresponding to the guide rods 311 are fixed in the screening chamber 12. The middle of the support block 312 is provided with a guide hole that matches the corresponding guide rod 311. The guide rod 311 moves through the corresponding guide hole. An anti-detachment block 313 is fixed at the bottom of the guide rod 311. A spring 314 is sleeved on the guide rod 311. The spring 314 is located between the top of the support block 312 and the bottom of the screening frame 31. The screening screen 32 is fixed on the screening frame 31. The vibrating motor 33 is fixed at the bottom of the screening frame 31. The lower end of the screening frame 31 extends to the feed end of the rotary conveying chamber 13. When the vibrating screening assembly 3 is working, the vibrating motor 33 fixed at the bottom of the screening frame 31 starts to generate vibration, which drives the screening frame 31 to vibrate synchronously. The screening frame 31 slides with the guide holes of the support block 312 in the screening chamber 12 through the guide rods 311 at the four corners of the bottom, and at the same time with the corresponding springs 314, to achieve up-and-down directional vibration, which classifies and screens the crushed phosphate mineral material entering the screening chamber 12. The qualified products slide down the inclined surface of the screening mesh 32 to the discharge port 15 at the bottom of the box 1, while the unqualified products slide down to the lower end of the screening frame 31 with the vibration, and then enter the feed end of the rotary conveying chamber 13, completing the screening and guiding and conveying of unqualified products. The buffering and vibration damping effect of the springs 314 can reduce the wear and tear on the box 1 and its components, extend the service life of the equipment, and optimize the vibration transmission effect to improve the screening efficiency.

[0040] like Figure 2 and Figure 3As shown, the second crushing assembly 4 includes a third guide plate 41, a crushing plate 42, a drive cylinder 43, and a transmission rod 44. The third guide plate 41 is inclinedly fixed in the screening chamber 12, located above the screening frame 31, with its lower end above the upper end of the screening frame 31. The upper end of the third guide plate 41 is connected to the discharge end of the rotary conveying chamber 13. The crushing plate 42 is inclinedly positioned above the third guide plate 41, with a crushing shaft 421 fixed at its upper end. The crushing shaft 421 is rotatably mounted in the screening chamber 12. A guide ring 422 with a strip-shaped hole is fixed on the side of the crushing plate 42 away from the third guide plate 41. The transmission rod 44 is slidably mounted in the guide ring 422, and one side of the transmission rod 44 is fixedly connected to the output shaft of the drive cylinder 43. The fixed end of the drive cylinder 43 is hinged in the screening chamber 12 via a hinge seat 8. When the second crushing assembly 4 is working... The substandard phosphate rock material conveyed by the rotary conveyor assembly 5 enters the third guide plate 41 through the discharge end of the rotary conveyor chamber 13. With the help of the inclination angle of the third guide plate 41 and the weight of the material itself, it slides smoothly into the crushing area between the third guide plate 41 and the crushing plate 42. The drive cylinder 43 is fixed in the screening chamber 12 through the hinge seat 8. The output shaft of the drive cylinder 43 extends and retracts, driving the transmission rod 44 to move. The transmission rod 44 slides along the strip hole of the guide ring 422 on the crushing plate 42, thereby driving the crushing plate 42 to rotate around the upper crushing shaft 421 in the screening chamber 12. Through the reciprocating swing action of the crushing plate 42, the impact and squeezing force is applied to the sliding substandard block phosphate rock material, completing the secondary crushing. The crushed material slides down the third guide plate 41 to the upper end of the inclined screening frame 31 below, and re-enters the vibrating screening process, ensuring the continuity of the process from secondary crushing to re-screening.

[0041] like Figure 3 As shown, the crushing plate 42 is uniformly provided with crushing teeth 423 on one side near the third guide plate 41, and the crushing teeth 423 further improve the crushing effect.

[0042] like Figure 3 As shown, there are two guide rings 422, which are symmetrically arranged. The transmission rod 44 is slidably disposed within the two guide rings 422, and the middle part of the transmission rod 44 is connected to the output shaft of the drive cylinder 43. The cooperation between the two symmetrical guide rings 422 and the transmission rod 44 can effectively limit the offset and swaying of the transmission rod 44 during its movement, compared with a single guide ring 422, so that the transmission rod 44 is subjected to balanced force, ensuring that the driving force of the drive cylinder 43 is accurately transmitted to the crushing plate 42, ensuring that the swinging action of the crushing plate 42 is smooth and continuous, and improving the stability of secondary crushing.

[0043] like Figure 1 and Figure 2As shown, the rotary conveyor assembly 5 includes a first rotating shaft 51, a second rotating shaft 52, a conveyor belt 53, and a conveyor motor 54. The first rotating shaft 51 and the second rotating shaft 52 are rotatably disposed within the rotary conveyor chamber 13, with the first rotating shaft 51 located directly above the second rotating shaft 52. The conveyor belt 53 is sleeved on the first rotating shaft 51 and the second rotating shaft 52. Multiple conveyor plates 531 are evenly fixed to the outer side of the conveyor belt 53. The conveyor motor 54 is fixed to the outer side of the housing 1. One end of the first rotating shaft 51 extends outside the housing 1 and is connected to the output shaft of the conveyor motor 54. When the rotary conveyor assembly 5 is working, the conveyor motor 54 starts and drives the first rotating shaft 51 to rotate within the second rotating shaft 52. When a rotating shaft 51 rotates, the first rotating shaft 51 and the second rotating shaft 52 are rotatably set inside the rotary conveying chamber 13, with the first rotating shaft 51 located directly above the second rotating shaft 52. The conveyor belt 53, which is sleeved on the two rotating shafts, rotates synchronously with the first rotating shaft 51. The conveyor plates 531, which are evenly arranged on the outer side of the conveyor belt 53, move together with the conveyor belt 53 to receive the unqualified phosphate mineral material entering the rotary conveying chamber 13. Through the cyclic operation of the conveyor belt 53 and the pushing action of the conveyor plates 531, the unqualified material is stably conveyed to the discharge end of the rotary conveying chamber 13 and then sent into the second crushing component 4 to complete secondary crushing.

[0044] like Figure 1 and Figure 2 As shown, the top of the box 1 is provided with a second feed port 16 that communicates with the screening chamber 12. The second feed port 16 is located above the upper end of the third guide plate 41. The setting of the second feed port 16 increases the flexible feeding channel of the device. When the first crushing component 2 fails, the material can be fed through the second feed port 16. The material falls directly into the upper end of the third guide plate 41 below through the second feed port 16. With the help of the inclination angle of the third guide plate 41 and the weight of the material itself, it slides smoothly into the crushing area between the third guide plate 41 and the crushing plate 42. After being crushed by the second crushing component 4, it is then guided by the third guide plate 41 to the screening frame 31 for vibratory screening.

[0045] like Figure 2As shown, a baffle assembly 9 is provided at the second feed inlet 16. The baffle assembly 9 includes a baffle plate 91 and a baffle cylinder 92. A receiving cavity 17 is provided inside the housing 1. The baffle cylinder 92 is fixedly installed in the receiving cavity 17, and the baffle plate 91 is movably installed in the receiving cavity 17. The telescopic end of the baffle cylinder 92 is fixedly connected to the baffle plate 91. When the baffle cylinder 92 drives the baffle plate 91 to extend out of the receiving cavity 17, it can block the second feed inlet 16. When it is not necessary to feed through the second feed inlet 16, the baffle cylinder 92 drives the baffle plate 91 to extend out. The receiving cavity 17 blocks the second feed port 16 located above the upper end of the third guide plate 41, thus blocking the material falling channel. When it is necessary to feed through the second feed port 16, the baffle cylinder 92 drives the baffle plate 91 to retract into the receiving cavity 17, releasing the blockage of the second feed port 16. The material can then fall normally into the third guide plate 41 through the second feed port 16. The baffle assembly 9 can flexibly control the opening and closing of the second feed port 16 to adapt to the switching needs of different feeding scenarios and prevent dust from overflowing from the second feed port 16 when feeding is not required.

[0046] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A screening device for phosphate ore beneficiation, characterized in that, include: The box body is divided into a crushing chamber, a screening chamber and a rotary conveying chamber. The discharge end of the crushing chamber is connected to the feed end of the screening chamber. The discharge end of the screening chamber is connected to the feed end of the rotary conveying chamber. The top of the box body is provided with a first feed inlet connected to the crushing chamber, and the bottom of the box body is provided with a discharge outlet connected to the screening chamber. The first crushing component is fixed inside the crushing chamber and is used to perform initial crushing on the phosphate mineral material entering the crushing chamber. A vibrating screen assembly is assembled in the screening chamber and is used to classify and screen the phosphate mineral material after primary crushing to separate qualified and unqualified products. The second crushing component is installed inside the screening chamber and is located above the vibrating screen component, and is used to perform secondary crushing on unqualified phosphate mineral materials. A rotary conveyor assembly is provided, corresponding to the rotary conveying chamber. The feed end of the rotary conveyor assembly is connected to the non-conforming product discharge end of the screening chamber, and the discharge end of the rotary conveyor assembly is connected to the feed end of the second crushing assembly. The rotary conveyor assembly is used to convey the non-conforming products screened by the vibrating screening assembly to the second crushing assembly. After secondary crushing by the second crushing assembly, the material falls back to the vibrating screening assembly for screening again.

2. The screening device for phosphate ore beneficiation according to claim 1, characterized in that: The first crushing assembly includes a first crushing roller, a second crushing roller, a first drive motor, and a second drive motor. The first crushing roller and the second crushing roller are rotatably disposed within the crushing chamber. The first crushing roller and the second crushing roller are arranged in parallel. The first drive motor and the second drive motor are fixed outside the housing. One end of the first crushing roller extends outside the housing and is connected to the output shaft of the first drive motor. One end of the second crushing roller extends outside the housing and is connected to the output shaft of the second drive motor.

3. The screening device for phosphate ore beneficiation according to claim 1, characterized in that: The first guide plate and the second guide plate are symmetrically fixed above the first crushing component in the crushing chamber. The first guide plate and the second guide plate are arranged in an inverted V-shape.

4. The screening device for phosphate ore beneficiation according to claim 1, characterized in that: The vibrating screening assembly includes a screening frame, a screening screen, and a vibrating motor. The screening frame is inclinedly disposed within the screening chamber. Guide rods are fixed at the four corners of the bottom of the screening frame. Support blocks corresponding to the guide rods are fixed within the screening chamber. A guide hole adapted to the corresponding guide rod is provided in the middle of the support block. The guide rod moves through the corresponding guide hole. An anti-detachment block is fixed at the bottom of the guide rod. A spring is sleeved on the guide rod. The spring is located between the top of the support block and the bottom of the screening frame. The screening screen is fixed on the screening frame. The vibrating motor is fixed at the bottom of the screening frame. The lower end of the screening frame extends to the feed end of the rotary conveying chamber.

5. The screening device for phosphate ore beneficiation according to claim 4, characterized in that: The second crushing assembly includes a third guide plate, a crushing plate, a drive cylinder, and a transmission rod. The third guide plate is inclinedly fixed in the screening chamber and located above the screening frame. The lower end of the third guide plate is located above the upper end of the screening frame, and the upper end of the third guide plate is connected to the discharge end of the rotary conveying chamber. The crushing plate is inclinedly positioned above the third guide plate, and a crushing shaft is fixedly mounted on the upper end of the crushing plate. The crushing shaft is rotatably mounted in the screening chamber. A guide ring with a strip-shaped hole is fixedly mounted on the side of the crushing plate away from the third guide plate. The transmission rod is slidably mounted in the guide ring, and one side of the transmission rod is fixedly connected to the output shaft of the drive cylinder. The fixed end of the drive cylinder is hinged in the screening chamber via a hinge seat.

6. The screening device for phosphate ore beneficiation according to claim 5, characterized in that: The crushing plate has crushing teeth evenly arranged on the side near the third guide plate.

7. The screening device for phosphate ore beneficiation according to claim 5, characterized in that: The guide ring is provided in two symmetrical arrangements. The transmission rod is slidably disposed within the two guide rings, and the middle part of the transmission rod is connected to the output shaft of the drive cylinder.

8. The screening device for phosphate ore beneficiation according to claim 1, characterized in that: The rotary conveyor assembly includes a first rotating shaft, a second rotating shaft, a conveyor belt, and a conveyor motor. The first rotating shaft and the second rotating shaft are rotatably disposed within the rotary conveyor cavity. The first rotating shaft is located directly above the second rotating shaft. The conveyor belt is sleeved on the first rotating shaft and the second rotating shaft. Multiple conveyor plates are uniformly fixed on the outer side of the conveyor belt. The conveyor motor is fixed on the outer side of the housing. One end of the first rotating shaft extends out of the housing and is connected to the output shaft of the conveyor motor.

9. The screening device for phosphate ore beneficiation according to claim 5, characterized in that: The top of the box is provided with a second feed port that communicates with the screening chamber, and the second feed port is located above the upper end of the third guide plate.

10. The screening device for phosphate ore beneficiation according to claim 9, characterized in that: A material blocking assembly is provided at the second feed inlet. The material blocking assembly includes a material blocking plate and a material blocking cylinder. The housing is provided with a receiving cavity. The material blocking cylinder is fixed in the receiving cavity. The material blocking plate is movably disposed in the receiving cavity. The telescopic end of the material blocking cylinder is fixedly connected to the material blocking plate. After the material blocking cylinder drives the material blocking plate to extend out of the receiving cavity, it can block the second feed inlet.

Images