A scale washing and impurity removing device and a method of using the same

Abstract

The present application relates to a kind of iron scale water washing impurity removal device and its use method, for the cleaning of iron phosphorus, including feed conveyor belt, water material mixing bin and water washing pool, the feed end of the water material mixing bin is equipped with receiving hopper, the receiving hopper is equipped with water washing mechanism, water material mixing bin's discharge end is equipped with the water material discharge pipe connected with the water washing pool below, the bottom surface of the water washing pool is inclined and is equipped with sewage outlet at lower end, water washing pool is equipped with water washing magnetic separation mechanism, the discharge end of water washing magnetic separation mechanism is equipped with discharge conveyor belt, the present application is separated by water spray to realize iron phosphorus and sundries, the mixed liquid of iron phosphorus and water is impacted at high speed by the ejection of high-pressure gas, improve the mixing effect of iron phosphorus and water, prevent iron phosphorus from depositing in water by the dispersion and flow of gas in liquid, make iron phosphorus and water mix evenly, finally realize the separation of iron phosphorus and liquid by water washing magnetic separation mechanism, so as to realize the cleaning of iron phosphorus in water, realize very efficient iron phosphorus cleaning effect.

Description

Technical Field

[0001] This invention relates to the field of cleaning device technology, specifically to a device for washing and removing impurities from iron scales and its usage method. Background Technology

[0002] Iron scale, also known as iron oxide scale or oxide scale, is a fish-scale-like substance that peels off from the surface of steel during the heating and rolling process due to the oxidation of the iron oxide layer. Iron scale can be used as an oxidizing agent and a raw material for producing iron powder.

[0003] When iron scale is used to make iron powder, it needs to be reduced in a reduction furnace to become pure iron. During the generation, collection and transportation of iron scale, some impurities, usually dust, will be mixed in. Especially during the collection process, iron scale is often collected after falling on the ground, so it will be mixed with a lot of dirt, dust and other impurities. These impurities mixed in with the iron scale will hinder the contact between reducing hydrogen and iron scale, and affect the reduction effect of iron scale, making the reduction incomplete.

[0004] The invention patent with announcement number CN100421806C discloses an iron phosphorus impurity removal system and process. Iron phosphorus in a dry state is subjected to magnetic separation to remove impurities. However, fine impurities such as dust will still be adsorbed on the surface of iron phosphorus or inside the clumps of iron phosphorus, and cannot be separated from iron phosphorus.

[0005] The utility model patent with announcement number CN202683340U discloses an iron scale water washing magnetic separation device, which uses three magnetic rollers 3 to perform three-stage magnetic separation. However, it still uses ordinary magnetic rollers to achieve magnetic separation, and cannot separate dust and other fine impurities from iron and phosphorus.

[0006] The invention patent with announcement number CN03149964.3 discloses a method and equipment system for treating oily iron scale in rolled steel. It first removes the moisture from the iron scale by evaporation, and then uses low-temperature distillation technology to remove the waste oil from the iron scale, achieving the purpose of producing clean iron scale and recovering waste oil from it. However, this patent also fails to achieve the separation of solid impurities from iron and phosphorus.

[0007] Therefore, it is best to clean the iron scales to remove internal impurities. However, iron scales are in the form of thin flakes or powder, making them difficult to clean effectively. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides an iron scale washing and impurity removal device and its usage method to achieve iron and phosphorus cleaning.

[0009] This invention is achieved through the following technical solution: a device for washing and removing impurities from iron scale, comprising a feeding conveyor belt, a water-material mixing chamber, and a washing tank. The feeding end of the water-material mixing chamber is equipped with a receiving hopper located below the discharge end of the feeding conveyor belt. The receiving hopper contains a water spray cleaning mechanism. The discharge end of the water-material mixing chamber is equipped with a water-material discharge pipe connected to the washing tank below. A horizontal rotating air inlet pipe is axially connected inside the water-material mixing chamber. The rotating air inlet pipe is sealed and connected to a high-pressure air source. Material spiral conveying blades, which are attached to the outer side of the rotating air inlet pipe and conform to the inner wall of the water-material mixing chamber, are fixedly connected to the outer side of the rotating air inlet pipe. The outer diameter of the material spiral conveying blades gradually increases along the water flow direction. The rotating air inlet pipe in the area of ​​the material spiral conveying blades has openings... The system includes multiple air outlets. An air intake motor drives the rotating air intake pipe on the water-material mixing chamber. A blade shaft motor is fixedly connected to the feed end of the water-material mixing chamber. A pressure boosting blade shaft, coaxially inserted into the rotating air intake pipe, is fixedly connected to the shaft of the blade shaft motor. Pressure boosting spiral conveying blades are fixedly connected to the pressure boosting blade shaft. The pitch of the pressure boosting spiral conveying blades gradually increases along the water flow direction within the water-material mixing chamber. The rotation direction of the pressure boosting blade shaft is opposite to the rotation direction of the rotating air intake pipe. Multiple high-pressure air outlets are opened on the rotating air intake pipe in the area of ​​the pressure boosting spiral conveying blades. The bottom surface of the washing tank is inclined, and a wastewater outlet is installed at the lower end. A washing magnetic separation mechanism is installed inside the washing tank, and a discharge conveyor belt is installed at the discharge end of the washing magnetic separation mechanism.

[0010] As an optimization, the water washing magnetic separation mechanism includes a horizontally arranged magnetic drum. The two ends of the lower end of the magnetic drum are respectively attached to the inner walls of the two sides of the water washing tank. Multiple magnetic adsorption plates are fixed to the outer ring of the magnetic drum. One end of the magnetic drum is open and the discharge conveyor belt extends into the opening. The other end of the magnetic drum is fixed to a central rotating shaft, which is axially connected to a support base. Adjacent magnetic adsorption plates form a pushing channel extending along the axial direction of the magnetic drum. A pusher plate is installed in the pushing channel. It also includes an iron-phosphorus ejection mechanism. When the pushing channel moves above the discharge conveyor belt, the iron-phosphorus ejection mechanism drives the pusher plate to move and eject the iron-phosphorus in the pushing channel onto the discharge conveyor belt.

[0011] As an optimization, the iron-phosphorus ejection mechanism includes a mounting plate fixed to the central rotating shaft and multiple electric push rods fixed to the mounting plate. The push plate is fixed to the telescopic shaft of the electric push rod. After the electric push rod retracts, the push plate disengages from the pushing channel and moves to the side of the support base away from the magnetic rotating cylinder.

[0012] As an optimization, multiple microswitches arranged circumferentially and corresponding one-to-one with electric push rods are fixed on the mounting plate, and a stop block is fixed on the upper end of the support base. After the microswitches contact the stop block, the corresponding electric push rods extend.

[0013] As an optimization, the bottom surface of the washing pool is provided with an arc-shaped section that fits into the magnetic adsorption sheet.

[0014] As an optimization, the thickness of the magnetic adsorption sheet gradually increases towards the magnetic rotating cylinder.

[0015] As an optimization, the water spraying cleaning mechanism includes an annular water spraying groove axially connected to the inner wall of the receiving hopper. The outer ring of the annular water spraying groove is open, and the inner wall of the receiving hopper and the annular water spraying groove form a closed annular water spraying chamber. A water supply pipe connected to the receiving hopper and communicating with the annular water spraying chamber is provided. The inner ring of the annular water spraying groove is provided with multiple water spray nozzles arranged circumferentially, and the water spray nozzles are inclined relative to the radial direction of the annular water spraying groove.

[0016] As an optimization, the water spraying cleaning mechanism also includes a central connecting ring located at the center of the annular water spraying channel, which is fixedly connected to the annular water spraying channel by multiple levers.

[0017] As an optimization, a support ring supporting the annular water spray channel is fixedly connected to the inner wall of the receiving hopper.

[0018] A method of using a device for washing and removing impurities from iron scale includes the following steps:

[0019] a. Iron and phosphorus are conveyed to the receiving hopper by the feeding conveyor belt. The water spraying cleaning mechanism sprays water onto the iron and phosphorus to mix the water and iron and phosphorus, and to separate the iron and phosphorus from the impurities by spraying water.

[0020] b. The mixture of iron, phosphorus and water flows downward to the feed end of the water mixing bin. The rotation of the pressurized screw conveyor blades compresses the gas in the rotating air intake pipe and sprays it out through the high-pressure air outlet, which impacts the mixture of iron, phosphorus and water at high speed, accelerating the separation of iron and phosphorus from impurities and improving the mixing effect of iron, phosphorus and water.

[0021] c. The mixture of iron, phosphorus and water is conveyed to the discharge end by the rotation of the material screw conveyor blades until it enters the washing tank through the water discharge pipe. During the conveying process, the outer diameter of the material screw conveyor blades gradually increases along the water flow direction. The gas in the rotating air inlet pipe is mixed with the mixture of iron, phosphorus and water through the air outlet. The dispersion and flow of gas in the liquid prevents iron and phosphorus from settling in the water and improves the uniform mixing of iron, phosphorus and water.

[0022] d. The mixture of iron, phosphorus and water flows along the bottom of the washing tank and drives the magnetic drum to rotate through the magnetic adsorption plate. The iron and phosphorus are adsorbed on the magnetic adsorption plate and the magnetic drum, and the sewage is discharged from the sewage outlet at the bottom of the washing tank.

[0023] e. When the iron phosphorus in the pushing channel rotates with the magnetic drum to the top of the discharge conveyor belt, the micro switch contacts the block to extend the electric push rod corresponding to the pushing channel, and drives the push plate to move to push the iron phosphorus in the pushing channel onto the discharge conveyor belt.

[0024] f. After the electric push rod pushes out the iron phosphorus, it retracts, causing the push plate to move to the side of the support base away from the magnetic rotating cylinder. When the push plate rotates downward, it will not interfere with the support base and the washing pool.

[0025] The beneficial effects of this invention are as follows: The iron scale water washing and impurity removal device and its usage method of this invention achieve the mixing of water and iron scale by spraying water onto the iron scale through a water spraying cleaning mechanism, and achieve the separation of iron scale and impurities by spraying water. The rotation of the pressurized screw conveyor blades compresses the gas in the rotating air inlet pipe and sprays it out through the high-pressure gas outlet, which impacts the iron scale and water mixture at high speed, accelerates the separation of iron scale and impurities, and improves the mixing effect of iron scale and water. Through the dispersion and flow of gas in the liquid, the iron scale is prevented from settling in the water, and the uniform mixing of iron scale and water is improved. Finally, the iron scale and liquid are separated by the water washing magnetic separation mechanism, thereby achieving the separation of iron scale and impurities in the water, achieving a very efficient iron scale water washing effect. In addition, the iron scale can be dispersed during the water washing process, which facilitates subsequent production operations. Attached Figure Description

[0026] Figure 1 This is an internal front view of the present invention;

[0027] Figure 2 This is an internal side view of the water washing magnetic separation mechanism of the present invention;

[0028] Figure 3 This is a front view of the magnetic rotating cylinder of the present invention;

[0029] Figure 4 This is an internal front view of the water-material mixing chamber of the present invention;

[0030] Figure 5 This is an internal front view of the water spray cleaning mechanism of the present invention;

[0031] Figure 6 This is an internal top view of the water spray cleaning mechanism of the present invention;

[0032] As shown in the figure:

[0033] 1. Feeding conveyor belt; 2. Discharge conveyor belt; 3. Water washing magnetic separation mechanism; 31. Magnetic drum; 32. Magnetic adsorption plate; 33. Central rotating shaft; 34. Mounting plate; 35. Push plate; 36. Electric push rod; 37. Gas distribution chamber; 38. Support base; 39. Bump block; 40. Micro switch; 4. Water spray cleaning mechanism; 41. Annular water spray trough; 42. Water supply pipe; 43. Spray nozzle; 44. Support ring; 45. Central connecting ring; 46. Lever; 5. Receiving hopper; 6. Water-material mixing chamber; 7. Rotary air inlet pipe; 8. Blade shaft motor; 9. Material screw conveyor blade; 10. Pressure boosting screw conveyor blade; 11. Pressure boosting blade shaft; 12. High-pressure air outlet; 13. Air outlet; 14. Air inlet pipe motor; 15. Water-material discharge pipe; 16. Water washing tank; 17. Sewage outlet. Detailed Implementation

[0034] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0035] like Figures 1-6 As shown, an iron scale washing and impurity removal device of the present invention includes a feeding conveyor belt 1, a water-material mixing chamber 6 and a washing tank 16. The feeding conveyor belt 1 is located above the water-material mixing chamber 6 and the washing tank 16 is located below the water-material mixing chamber 6.

[0036] The water-material mixing bin 6 is horizontally positioned, with a cylindrical inlet and a conical outlet, both ends of which are closed. The inlet of the water-material mixing bin 6 is equipped with a receiving hopper 5 located below the outlet of the feeding conveyor belt 1. The receiving hopper 5 faces upwards and has a flared top. The outlet of the water-material mixing bin 6 is equipped with a water-material discharge pipe 15 connected to the washing tank 16 below. The water-material discharge pipe 15 faces downwards and is connected to the upper end of the washing tank 16.

[0037] The washing tank 16 has an inclined bottom and a wastewater outlet 17 at its lower end. A washing magnetic separator 3 is installed inside the washing tank 16. A discharge conveyor belt 2 is installed at the discharge end of the washing magnetic separator 3. The washing magnetic separator 3 separates iron and phosphorus from the water and transports the separated iron and phosphorus to the subsequent drying process via the discharge conveyor belt 2. The remaining wastewater is discharged through the wastewater outlet 17. In this embodiment, one washing magnetic separator 3 is installed in the washing tank 16; however, multiple separators can be installed to reduce the missed separation rate.

[0038] like Figure 5 , 6As shown, the receiving hopper 5 is equipped with a water spraying cleaning mechanism 4, which is located in the cylindrical section of the receiving hopper 5. The water spraying cleaning mechanism 4 includes an annular water spraying groove 41 that is axially connected to the inner wall of the receiving hopper 5. The outer ring of the annular water spraying groove 41 is open, and the inner wall of the receiving hopper 5 and the annular water spraying groove 41 form a closed annular water spraying cavity. In this embodiment, the cross-section of the annular water spraying groove 41 is U-shaped and the opening faces the inner wall of the receiving hopper 5. A sealing ring is installed at the position where the opening contacts the inner wall of the receiving hopper 5. The sealing effect of the sealing ring is not required to be high, thereby reducing the rotational resistance of the annular water spraying groove 41 at this point.

[0039] The receiving hopper 5 is connected to a water supply pipe 42 that communicates with the annular water spray chamber, through which high-pressure water is injected into the annular water spray chamber.

[0040] To achieve the axial connection of the annular water spray channel 41, in this embodiment, a support ring 44 supporting the annular water spray channel 41 is fixedly connected to the inner wall of the receiving hopper 5. Since the outer ring of the annular water spray channel 41 is in contact with the inner wall of the receiving hopper 5, the axial rotation of the annular water spray channel 41 is achieved.

[0041] The annular water spray channel 41 has multiple circumferentially arranged spray nozzles 43 on its inner ring. The spray nozzles 43 are arranged in two rows, upper and lower, to increase the spray volume. The spray nozzles 43 are inclined relative to the radial direction of the annular water spray channel 41. For example... Figure 6 As shown, all the spray nozzles 43 are located on the same horizontal plane, and the nozzles are inclined on the same horizontal plane and at a certain angle to the radial direction of the annular spray trough 41. Thus, through the reaction force of the water flow, the annular spray trough 41 is driven to rotate, forming a water curtain on the horizontal plane of the receiving hopper 5, so that the falling iron and phosphorus can come into contact with the water.

[0042] The water spray cleaning mechanism 4 also includes a central connecting ring 45 located at the center of the annular water spray tank 41. The central connecting ring 45 is fixedly connected to the annular water spray tank 41 by multiple levers 46. By rotating with the annular water spray tank 41, the levers 46 impact and break up the large clumps of iron and phosphorus particles into smaller pieces, making it easier to mix evenly with water.

[0043] The water-material mixing chamber 6 is internally connected to a horizontal rotating air inlet pipe 7. The rotating air inlet pipe 7 is coaxially arranged with the water-material mixing chamber 6, and one end of the rotating air inlet pipe 7 protrudes from the water-material mixing chamber 6 near the discharge end. The water-material mixing chamber 6 is equipped with an air inlet pipe motor 14 that drives the rotating air inlet pipe 7 to rotate. The air inlet pipe motor 14 drives the protruding end to rotate through belt drive.

[0044] The end of the rotary air intake pipe 7 near the feed end of the water-material mixing chamber 6 is sealed. The rotary air intake pipe 7 is sealed and connected to a high-pressure air source. In this embodiment, the outlet end of the rotary air intake pipe 7 is connected to the air source through a rotary joint to realize internal air supply.

[0045] A blade shaft motor 8 is fixedly connected to the feed end of the water-material mixing bin 6. The blade shaft motor 8 is coaxial with the water-material mixing bin 6. A booster blade shaft 11, which is coaxially inserted into the rotating air intake pipe 7, is fixedly connected to the rotating shaft of the blade shaft motor 8. The booster blade shaft 11 is located below the receiving hopper 5.

[0046] A booster screw conveyor blade 10 is fixedly connected to the booster blade shaft 11. The pitch of the booster screw conveyor blade 10 gradually increases along the water flow direction in the water-material mixing chamber 6. The rotation direction of the booster blade shaft 11 is opposite to the rotation direction of the rotating air intake pipe 7. Therefore, through the rotation of the booster screw conveyor blade 10, the gas in the rotating air intake pipe 7 enters the booster screw conveyor blade 10. As the pitch decreases, the pressure of the gas increases, thus achieving a booster effect.

[0047] The rotating air inlet pipe 7 in the area of ​​the pressurized spiral conveyor blade 10 has multiple high-pressure air outlets 12. The high-pressure air outlets 12 are located below the receiving hopper 5, thereby impacting the liquid after the iron phosphorus and water are mixed, causing the liquid to churn and mix rapidly at high speed, breaking up the iron phosphorus and achieving full mixing with the water, and separating the impurities from the iron phosphorus.

[0048] The rotating air inlet pipe 7 is fixed to the outside of a material spiral conveying blade 9 that fits against the inner wall of the water-material mixing chamber 6. The outer diameter of the material spiral conveying blade 9 gradually increases along the water flow direction, thus fitting against the conical inner wall of the discharge end. Multiple air outlets 13 are opened on the rotating air inlet pipe 7 in the area of ​​the material spiral conveying blade 9. The gas mixes with the liquid through the air outlets 13, thereby forming a mixed liquid of iron phosphorus, water and gas. This mixed liquid is quickly discharged through the water-material discharge pipe 15 and should contact the water washing magnetic separation mechanism 3 as soon as possible to prevent iron phosphorus from settling.

[0049] like Figure 1-3 As shown, the water washing magnetic separation mechanism 3 includes a horizontally arranged magnetic drum 31. The two ends of the lower end of the magnetic drum 31 are respectively attached to the inner walls of the two sides of the water washing tank 16. A plurality of magnetic adsorption plates 32 are fixed to the outer ring of the magnetic drum 31. The magnetic adsorption plates 32 extend along the length direction of the magnetic drum 31 and their two ends are respectively aligned with the two ends of the magnetic drum 31. The cross-section of the magnetic adsorption plates 32 is the same at all points along the length direction. The thickness of the magnetic adsorption plates 32 gradually increases towards the magnetic drum 31. Both the magnetic adsorption plates 32 and the magnetic drum 31 are made of permanent magnet materials.

[0050] The bottom surface of the washing tank 16 is provided with an arc-shaped section that fits into the magnetic adsorption sheet 32. Since the bottom surface of the washing tank 16 is inclined, the water flows through the washing magnetic separation mechanism 3 to achieve magnetic separation and drive the magnetic drum 31 to rotate.

[0051] One end of the magnetic drum 31 is open, and the discharge conveyor belt 2 extends into the opening. Adjacent magnetic adsorption plates 32 form a pushing channel extending axially along the magnetic drum 31. A pusher plate 35 is installed within the pushing channel, and an iron-phosphorus ejection mechanism is also included. When the pushing channel moves above the discharge conveyor belt 2, the iron-phosphorus ejection mechanism drives the pusher plate 35 to move, pushing the iron-phosphorus in the pushing channel onto the discharge conveyor belt 2. Each pusher plate 35 operates independently. Figure 3 As shown, this embodiment sets up 14 push channels, which means it sets up 14 push plates 35.

[0052] The other end of the magnetic rotating drum 31 is fixedly connected to a central rotating shaft 33, which is coaxially arranged with the magnetic rotating drum 31. The central rotating shaft 33 is connected to the support base 38 through a bearing. The support base 38 is fixed on the ground and located on one side of the washing pool 16.

[0053] The iron-phosphorus ejection mechanism includes a mounting plate 34 fixed to the central rotating shaft 33 and a plurality of electric push rods 36 fixed to the mounting plate 34. The mounting plate 34 is fixed to the end of the central rotating shaft 33 away from the magnetic rotating cylinder 31, so that both ends of the central rotating shaft 33 are fixed with weights, and the weights at both ends are similar, preventing cantilever support.

[0054] The number of electric push rods 36 is the same as that of push plates 35 and they correspond one-to-one. The push plates 35 are fixed to the telescopic shaft of the electric push rods 36. The electric push rods 36 rotate together with the magnetic rotating drum 31, so the push plates 35 are always aligned with their corresponding push channels.

[0055] After the electric push rod 36 retracts, the push plate 35 disengages from the push channel and moves to the side of the support base 38 away from the magnetic rotating cylinder 31, so that the push plate 35 will not interfere with the support base 38 and the washing pool 16 after rotating downwards.

[0056] Multiple microswitches 40 arranged circumferentially and corresponding one-to-one with electric push rods 36 are fixed on the mounting plate 34. A contact block 39 is fixed on the upper end of the support base 38. After the microswitches 40 contact the contact block 39, the corresponding electric push rods 36 extend.

[0057] A method of using a device for washing and removing impurities from iron scale includes the following steps:

[0058] a. Iron and phosphorus are conveyed to the receiving hopper 5 by the feeding conveyor belt 1. The water spraying cleaning mechanism 4 sprays water onto the iron and phosphorus to mix water and iron and phosphorus, and to separate iron and phosphorus from impurities by spraying water.

[0059] b. The mixture of iron, phosphorus and water flows downward to the feed end of the water mixing bin 6. The gas in the rotating air intake pipe 7 is compressed by the rotation of the pressurized screw conveyor blade 10 and ejected through the high-pressure air outlet 12, which impacts the mixture of iron, phosphorus and water at high speed, accelerates the separation of iron and phosphorus from impurities, and improves the mixing effect of iron, phosphorus and water.

[0060] c. The mixture of iron, phosphorus and water is conveyed to the discharge end by the rotation of the material screw conveyor blade 9 until it enters the washing tank 16 through the water discharge pipe 15. During the conveying process, the outer diameter of the material screw conveyor blade 9 gradually increases along the water flow direction. The gas in the rotating air inlet pipe 7 is mixed with the mixture of iron, phosphorus and water through the air outlet 13. Through the dispersion and flow of gas in the liquid, the iron and phosphorus are prevented from settling in the water, and the uniform mixing of iron, phosphorus and water is improved.

[0061] d. The mixture of iron, phosphorus and water flows along the bottom surface of the washing tank 16 and drives the magnetic drum 31 to rotate through the magnetic adsorption sheet 32. The iron and phosphorus are adsorbed on the magnetic adsorption sheet 32 ​​and the magnetic drum 31, and the sewage is discharged from the sewage outlet 17 at the bottom surface of the washing tank 16.

[0062] e. When the iron phosphorus in the pushing channel rotates with the magnetic drum 31 to the top of the discharge conveyor belt 2, the micro switch 40 contacts the block 39 to extend the electric push rod 36 corresponding to the pushing channel, and drives the push plate 35 to move to push the iron phosphorus in the pushing channel onto the discharge conveyor belt 2.

[0063] f. After the electric push rod 36 pushes out the iron phosphorus, it retracts, causing the push plate 35 to move to the side of the support base 38 away from the magnetic rotating cylinder 31. When the push plate 35 rotates downward, it will not interfere with the support base 38 and the washing pool 16.

[0064] Of course, the above description is not limited to the examples above. Technical features not described in this invention can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solutions of this invention and are not intended to limit this invention. This invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention do not depart from the spirit of this invention and should also fall within the scope of protection of the claims of this invention.

Claims

1. A device for washing and removing impurities from iron scale, characterized in that: It includes a feeding conveyor belt (1), a water-material mixing bin (6) and a washing pool (16). The feeding end of the water-material mixing bin (6) is equipped with a receiving hopper (5) located below the discharge end of the feeding conveyor belt (1). The receiving hopper (5) is equipped with a water spraying cleaning mechanism (4). The discharge end of the water-material mixing bin (6) is equipped with a water discharge pipe (15) connected to the washing pool (16) below. The water-material mixing chamber (6) is axially connected to a horizontal rotating air inlet pipe (7). The rotating air inlet pipe (7) is sealed and connected to a high-pressure air source. The rotating air inlet pipe (7) is fixed to the outside of the rotating air inlet pipe (7) and is attached to the inner wall of the water-material mixing chamber (6). The outer diameter of the material spiral conveying blade (9) gradually increases along the water flow direction. Multiple air outlets (13) are opened on the rotating air inlet pipe (7) in the area of ​​the material spiral conveying blade (9). The water-material mixing chamber (6) is equipped with an air inlet pipe motor (14) that drives the rotating air inlet pipe (7) to rotate. A blade shaft motor (8) is fixedly connected to the feed end of the water-material mixing bin (6). A booster blade shaft (11) is fixedly connected to the rotating shaft of the blade shaft motor (8) and coaxially inserted into the rotating air intake pipe (7). A booster screw conveyor blade (10) is fixedly connected to the booster blade shaft (11). The pitch of the booster screw conveyor blade (10) gradually increases along the water flow direction in the water-material mixing bin (6). The rotation direction of the booster blade shaft (11) is opposite to the rotation direction of the rotating air intake pipe (7). Multiple high-pressure air outlets (12) are opened on the rotating air intake pipe (7) in the area of ​​the booster screw conveyor blade (10). The bottom of the washing tank (16) is inclined and the lower end is equipped with a sewage outlet (17). The washing tank (16) is equipped with a washing magnetic separation mechanism (3), and the discharge end of the washing magnetic separation mechanism (3) is equipped with a discharge conveyor belt (2).

2. The iron scale washing and impurity removal device according to claim 1, characterized in that: The water washing magnetic separation mechanism (3) includes a horizontally arranged magnetic drum (31). The two ends of the lower end of the magnetic drum (31) are respectively attached to the inner walls of the two sides of the water washing tank (16). Multiple magnetic adsorption plates (32) are fixed to the outer ring of the magnetic drum (31). One end of the magnetic drum (31) is open and the discharge conveyor belt (2) extends into the opening. The other end of the magnetic drum (31) is fixed to a central rotating shaft (33). The central rotating shaft (33) is axially connected to the support base (38). Adjacent magnetic adsorption plates (32) form a pushing channel extending along the axial direction of the magnetic drum (31). The pushing channel is equipped with a push plate (35). It also includes an iron phosphorus ejection mechanism. When the pushing channel moves above the discharge conveyor belt (2), the iron phosphorus ejection mechanism drives the push plate (35) to move and eject the iron phosphorus in the pushing channel onto the discharge conveyor belt (2).

3. The iron scale washing and impurity removal device according to claim 2, characterized in that: The iron-phosphorus ejection mechanism includes a mounting plate (34) fixed to a central rotating shaft (33) and a plurality of electric push rods (36) fixed to the mounting plate (34). The push plate (35) is fixed to the telescopic shaft of the electric push rod (36). After the electric push rod (36) retracts, the push plate (35) disengages from the push channel and moves to the side of the support base (38) away from the magnetic rotating cylinder (31).

4. The iron scale washing and impurity removal device according to claim 3, characterized in that: Multiple microswitches (40) are fixedly connected to the mounting plate (34) and are arranged circumferentially and correspond one-to-one with the electric push rods (36). A stop block (39) is fixedly connected to the upper end of the support base (38). After the microswitches (40) contact the stop block (39), the corresponding electric push rods (36) extend out.

5. The iron scale washing and impurity removal device according to claim 2, characterized in that: The bottom surface of the washing pool (16) is provided with an arc-shaped section that fits into the magnetic adsorption sheet (32).

6. The iron scale washing and impurity removal device according to claim 2, characterized in that: The thickness of the magnetic adsorption sheet (32) gradually increases towards the magnetic rotating cylinder (31).

7. The iron scale washing and impurity removal device according to claim 1, characterized in that: The water spray cleaning mechanism (4) includes an annular water spray groove (41) axially connected to the inner wall of the receiving hopper (5). The outer ring of the annular water spray groove (41) is open. The inner wall of the receiving hopper (5) and the annular water spray groove (41) form a closed annular water spray cavity. A water supply pipe (42) connected to the receiving hopper (5) and communicating with the annular water spray cavity is provided. The inner ring of the annular water spray groove (41) is provided with a plurality of water spray nozzles (43) arranged in a circumferential direction. The water spray nozzles (43) are inclined relative to the radial direction of the annular water spray groove (41).

8. The iron scale washing and impurity removal device according to claim 7, characterized in that: The water spray cleaning mechanism (4) also includes a central connecting ring (45) located at the center of the annular water spray tank (41), and the central connecting ring (45) is fixedly connected to the annular water spray tank (41) by a plurality of levers (46).

9. The iron scale washing and impurity removal device according to claim 7, characterized in that: The inner wall of the receiving hopper (5) is fixed with a support ring (44) that supports the annular water spray trough (41).

10. A method of using the iron scale washing and impurity removal device according to claim 4, characterized in that, Includes the following steps: a. Iron and phosphorus are conveyed to the receiving hopper (5) by the feeding conveyor belt (1). The water spraying cleaning mechanism (4) sprays water onto the iron and phosphorus to achieve the mixing of water and iron and phosphorus, and achieves the separation of iron and phosphorus from impurities by spraying water. b. The mixture of iron, phosphorus and water flows downward to the feed end of the water mixing bin (6). The gas in the rotating air intake pipe (7) is compressed by the rotation of the pressurized screw conveyor blade (10) and sprayed out through the high-pressure gas outlet (12) to impact the mixture of iron, phosphorus and water at high speed, accelerate the separation of iron and phosphorus from impurities, and improve the mixing effect of iron, phosphorus and water. c. The mixture of iron, phosphorus and water is conveyed to the discharge end by the rotation of the material screw conveyor blade (9) until it enters the washing tank (16) through the water discharge pipe (15). During the conveying process, the outer diameter of the material screw conveyor blade (9) gradually increases along the direction of water flow. The gas in the rotating air inlet pipe (7) is mixed with the mixture of iron, phosphorus and water through the air outlet (13). Through the dispersion and flow of gas in the liquid, the iron and phosphorus are prevented from settling in the water, and the uniform mixing of iron and phosphorus with water is improved. d. The mixture of iron phosphorus and water flows along the bottom of the washing tank (16) and drives the magnetic drum (31) to rotate through the magnetic adsorption plate (32). The iron phosphorus is adsorbed on the magnetic adsorption plate (32) and the magnetic drum (31), and the sewage is discharged from the sewage outlet (17) at the bottom of the washing tank (16). e. When the iron phosphorus in the push channel rotates with the magnetic drum (31) to the top of the discharge conveyor belt (2), the micro switch (40) contacts the block (39) to extend the electric push rod (36) corresponding to the push channel, and drive the push plate (35) to move and push the iron phosphorus in the push channel onto the discharge conveyor belt (2). f. The electric push rod (36) pushes out the iron phosphorus and then retracts, causing the push plate (35) to move to the side of the support base (38) away from the magnetic rotating cylinder (31). When the push plate (35) rotates downward, it will not interfere with the support base (38) and the washing pool (16).

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