Grinding agent controllable type ferric oxide powder processing technology and device

Abstract

The invention relates to the technical field of iron oxide powder processing, in particular to a grinding agent controllable type iron oxide powder processing technology and device, and the grinding agent controllable type iron oxide powder processing technology comprises the following steps of preliminary magnetic separation, drying co-processing, dynamic grinding, post-processing and material taking-out post-processing. A machining device used in the treatment method comprises a machine frame, a dynamic grinding mechanism and a pretreatment structure are arranged at the upper end of the interior of the machine frame, a post-treatment assembly is arranged at the lower end of the interior of the machine frame, a vacuum refrigerator is arranged at the position, located at the bottom end, of the inner side wall of the machine frame, and the dynamic grinding mechanism comprises a laminate fixedly installed at the upper end of the interior of the machine frame; drying, magnetic separation, grinding and post-treatment procedures are integrated in a single machine frame, continuous treatment of iron ore concentrate powder from pretreatment to finished product output is achieved by means of cooperative operation of a dynamic grinding mechanism, a pretreatment structure and a post-treatment assembly, loss in the material transferring process is reduced, and the quality of iron ore concentrate powder is improved. And the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of iron oxide powder processing, in particular to a grinding agent controllable iron oxide powder processing technology and device. BACKGROUND

[0002] Iron oxide powder is an important industrial raw material and is widely used in the fields of magnetic materials, pigments, electronic components and catalysts. The application performance of the iron oxide powder depends on the purity, particle size distribution and particle morphology of the product to a great extent. In high-end application scenarios, high requirements are put forward for the particle size uniformity, low impurity content and surface activity of the iron oxide powder.

[0003] At present, the traditional iron oxide powder processing technology usually comprises steps of drying, grinding, magnetic separation and surface modification. However, the traditional processing technology of the iron oxide powder has obvious defects: firstly, the production links (such as drying, grinding and magnetic separation) are independent of each other, resulting in long process and low efficiency; secondly, there are problems of poor drying and pretreatment effect, rough grinding precision, incomplete impurity removal and easy damage of product activity, which limits the stable preparation of high-purity and high-performance iron oxide powder.

[0004] In order to solve the above problems, it is urgent to integrate drying, magnetic separation, grinding and modification, especially how to realize online, quantitative and uniform addition of grinding aids and form synergy with the dynamic grinding process, which becomes the key technical bottleneck for improving the quality of the iron oxide powder. In view of the technical defects, a solution is provided. SUMMARY

[0005] The purpose of the application is to integrate drying, magnetic separation, grinding and post-treatment processes in a single machine frame, and to realize continuous treatment of iron concentrate powder from pretreatment to finished product output by means of the synergistic operation of the dynamic grinding mechanism, the pretreatment structure and the post-treatment assembly, thereby reducing the loss in the material transfer process and improving the production efficiency.

[0006] The purpose of the application can be achieved by the following technical scheme: a grinding agent controllable iron oxide powder processing technology, comprising the following steps: S1: preliminary magnetic separation and drying synergistic treatment: the iron concentrate powder is introduced into the processing device, and the metal impurities are removed by preliminary magnetic separation, and then rotary drying is performed until the moisture content of the material is stable; S2: dynamic grinding: a silane coupling agent is added in an amount of 0.2% of the mass of the raw material, and then dynamic grinding is performed in sequence until the particle size of the mixture meets the standard; S3: post-treatment: the particulate matter is discharged by screening and centrifugation, and then further magnetic separation is performed by means of electromagnet, residual impurities are separated, and vacuum freeze-drying is performed to maximize the retention of active components of the material; S4: After the material is taken out, multi-dimensional quality detection is performed through a laser particle size analyzer, a magnetic permeability detector, and a moisture content detector to ensure that the iron oxide powder meets the core index requirements of the controllable type iron oxide powder.

[0007] The processing device used in the above processing method comprises a machine frame, a dynamic grinding mechanism and a pretreatment structure are arranged at the upper end inside the machine frame, a post-treatment assembly is arranged at the lower end inside the machine frame, and a vacuum freezer is arranged at the bottom end of the inner side wall of the machine frame.

[0008] Further, the dynamic grinding mechanism comprises a layer plate fixedly installed at the upper end inside the machine frame, a rotating drum is arranged at the center of the surface of the layer plate, a plurality of groups of racks are equidistantly arranged at the outer wall and the top end frame edge of the rotating drum, main rotating gears are respectively engaged at the two sides of the rotating drum, the bottom of one of the main rotating gears is rotationally connected with the surface of the layer plate, a double-shaft motor is arranged at the bottom of the main rotating gear, and a centrifugal tooth disc is arranged at the bottom output end of the double-shaft motor.

[0009] Further, a plurality of groups of positioning cylinders are arranged at the center inside the rotating drum, the bottom frame of the positioning cylinder is fixedly connected with the inner wall of the rectangular groove arranged at the center of the layer plate through a support plate, and a storage circular plate is movably installed inside the positioning cylinder.

[0010] Further, shaft rods are respectively arranged at the front and rear and both side frames of the positioning cylinder, auxiliary rotating gears are fixedly installed at one end of the shaft rods extending to the outside of the positioning cylinder, the auxiliary rotating gears are engaged with the racks arranged on the top surface of the rotating drum, pressure rollers are fixedly sleeved with the other ends of the shaft rods extending to the inside of the positioning cylinder, and the bottom surface of the pressure roller is in contact with the surface of the storage circular plate.

[0011] Further, the surface of the storage circular plate is arranged in a mesh surface, a tooth groove is arranged at the edge of the mesh surface, a lifting rod is fixedly installed at the center of the top surface of the storage circular plate, a double-shaft clasp one is fixedly installed at the top end of the lifting rod, an H-shaped sleeve frame is sleeved with the outside of the double-shaft clasp one, and a cylinder one is arranged between the top surface of the H-shaped sleeve frame and the inner wall of the top of the machine frame.

[0012] Further, the pretreatment structure comprises a drying cylinder installed at one side of the top surface cylinder frame of the positioning cylinder, a feeding pipe is arranged at the center of the top of the drying cylinder, a rotating rod is transversely arranged inside the drying cylinder, a plurality of groups of ring magnetic rings are equidistantly sleeved with the rotating rod at the inside section of the drying cylinder, and the ring magnetic rings and the rotating rod are fixedly connected through a plurality of groups of connecting blocks.

[0013] Further, a pushing circular plate is fixedly sleeved with the rotating rod outside and away from the outlet end inside the drying cylinder, the outer diameter of the ring magnetic ring is smaller than the inner diameter of the drying cylinder, the outer diameter of the pushing circular plate is matched with the inside of the drying cylinder, heating fins are arranged on the inner wall of the drying cylinder, and the heating fins are linked with a temperature sensor to realize accurate control of the hot air temperature.

[0014] Furthermore, the rotating rod is fixedly sleeved with a driven gear outside the drying cylinder, and the driven gear meshes with one of the auxiliary rotating gears. The rotating rod is fixedly sleeved with a double-shaft retaining ring two away from the drying cylinder, and a rectangular sleeve is sleeved outside the double-shaft retaining ring two. A cylinder two is provided between the side of the rectangular sleeve and the inner side wall of the machine frame.

[0015] Furthermore, the rotating rod is fixedly sleeved with a driven gear outside the drying cylinder, and the driven gear meshes with one of the auxiliary rotating gears. The rotating rod is fixedly sleeved with a double-shaft retaining ring two away from the drying cylinder, and a rectangular sleeve is sleeved outside the double-shaft retaining ring two. A cylinder two is provided between the side of the rectangular sleeve and the inner side wall of the machine frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves precise control of hot air temperature by linking pretreatment with a dynamic grinding mechanism and linking the heating element and temperature sensor inside the drying cylinder, thus stabilizing the moisture content of iron concentrate powder and laying the foundation for subsequent grinding and modification. At the same time, the rotating rod drives the ring magnetic ring to rotate, and magnetic separation is carried out simultaneously during the drying process, effectively removing metal impurities from the iron concentrate powder, reducing the load on subsequent processing, and improving the purity of the material. 2. This invention utilizes a dynamic grinding mechanism. A rotating drum drives a pressure roller to roll and compress the material on a circular plate. Combined with the chemical bonding force of the silane coupling agent, this achieves uniform crushing and mixing of the material, ensuring the final particle size reaches the specified size. This improves the dispersibility and surface modification effect of the material. Simultaneously, the height of the circular plate is adjusted by a cylinder to dynamically change the grinding pressure, adapting to different material characteristics and avoiding over-grinding or under-grinding, thus improving grinding efficiency and quality. Furthermore, the mesh design of the circular plate enables preliminary screening during the grinding process, allowing fine materials to fall directly. After grinding, a centrifugal toothed disc drives the circular plate to rotate, using centrifugal force to evenly disperse and discharge the material, ensuring its smooth entry into the post-processing stage. 3. By setting up post-processing components, electromagnetic rollers, and resistance blocks, this invention extends the residence time of materials in the magnetic separation zone, adsorbs residual metal impurities through the magnetic field, further purifies the materials, and reduces the impurity content. At the same time, it uses a vacuum freeze dryer for freeze drying to retain the active components of the materials to the maximum extent. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the combination of the partial mechanism of the machine frame, the dynamic grinding mechanism, and the pretreatment structure of the present invention; Figure 3 This is a schematic diagram of the preprocessing structure of the present invention; Figure 4 This is a schematic diagram of the dynamic grinding mechanism of the present invention; Figure 5 This is a half-sectional schematic diagram of the layer plate of the present invention; Figure 6 This is a schematic diagram of the bottom of the layer plate of the present invention; Figure 7 This is a schematic diagram of the post-processing component of the present invention; Figure 8 This is a process flow diagram of the present invention.

[0019] In the diagram: 1. Machine frame; 2. Dynamic grinding mechanism; 21. Sheet plate; 22. Rotary drum; 23. Main rotating gear; 24. Dual-shaft motor; 25. Centrifugal gear disc; 26. Positioning cylinder; 27. Storage circular plate; 28. Auxiliary rotating gear; 29. ​​Pressure roller; 210. Lifting rod; 211. Dual-shaft retaining ring one; 212. H-shaped sleeve frame; 213. Cylinder one; 3. Pre-treatment structure; 31. Drying cylinder; 32. Rotating rod; 33. Magnetic ring; 34. Pushing circular plate; 35. Driven gear; 36. Dual-shaft retaining ring two; 37. Rectangular sleeve frame; 38. Cylinder two; 4. Post-treatment assembly; 41. Distributing frame; 42. Electromagnetic roller; 43. Block. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 8 As shown, a process for processing iron oxide powder with controllable abrasive includes the following steps: S1: Preliminary magnetic separation and drying combined treatment: Select iron concentrate powder and introduce it into the processing device. First, perform primary magnetic separation to remove metal impurities, and then perform rotary drying until the moisture content of the material is stable. S2: Dynamic grinding: Add 0.2% of the raw material mass of silane coupling agent, and then adjust the dynamic grinding in sequence until the particle size of the mixture meets the standard. S3: Post-processing: The particulate matter is removed by sieving and centrifugation, and then further separated by electromagnetic separation to remove residual impurities. At the same time, the material is freeze-dried by vacuum freezing technology to retain the active components to the greatest extent. S4: After the material is removed, multi-dimensional quality testing is carried out using a laser particle size analyzer, magnetic permeability analyzer, and moisture content analyzer to ensure that the iron oxide powder meets the core index requirements of the controllable iron oxide powder for abrasives.

[0022] Example 2: Please refer to Figure 1 - Figure 6 As shown, the processing device used in the above processing method includes a frame 1. A dynamic grinding mechanism 2 and a pre-treatment structure 3 are provided at the upper end of the frame 1. A post-treatment component 4 is provided at the lower end of the frame 1. A vacuum freezer is provided at the bottom end of the inner side wall of the frame 1. The dynamic grinding mechanism 2 includes a shelf 21 fixedly installed inside the upper part of the frame 1. A rotating cylinder 22 is provided at the center of the surface of the shelf 21. Several sets of racks are provided at equal intervals on the outer wall and top edge of the rotating cylinder 22. Main rotating gears 23 are meshed on both sides of the rotating cylinder 22. The bottom of the main rotating gears 23 is rotatably connected to the surface of the shelf 21. A dual-shaft motor 24 is provided at the bottom of one set of main rotating gears 23. A centrifugal toothed disk 25 is provided at the bottom output end of the dual-shaft motor 24. Several sets of positioning cylinders 26 are provided through the center of the rotating cylinder 22. The bottom edge of the positioning cylinder 26 is fixedly connected to the inner wall of the rectangular groove provided at the center of the shelf 21 through a support plate. A circular plate 27 is movably installed inside the positioning cylinder 26. A shaft is provided through the front, back and side edges of the positioning cylinder 26. An auxiliary rotating gear 28 is fixedly installed at one end of the shaft extending to the outside of the positioning cylinder 26. The bottom of the auxiliary rotating gear 28 meshes with the racks provided on the top surface of the rotating cylinder 22. The pretreatment structure 3 includes a drying cylinder 31 installed on one side of the top frame of the positioning cylinder 26. A feed conduit is provided at the center of the top of the drying cylinder 31. A rotating rod 32 is transversely arranged inside the drying cylinder 31. Several sets of magnetic rings 33 are evenly sleeved on the rotating rod 32 at sections inside the drying cylinder 31. The magnetic rings 33 and the rotating rod 32 are fixedly connected by several sets of connecting blocks. A pusher plate 34 is fixedly sleeved on the outside of the rotating rod 32 and inside the drying cylinder 31 away from the opening end. The outer diameter of the magnetic rings 33 is smaller than the inner diameter of the drying cylinder 31. Furthermore, the outer diameter of the pusher disc 34 is adapted to the interior of the drying cylinder 31. The inner wall of the drying cylinder 31 is equipped with heating elements, which are linked with a temperature sensor to achieve precise control of the hot air temperature. The rotating rod 32 is fixedly sleeved with a driven gear 35 outside the drying cylinder 31, and the driven gear 35 meshes with one of the auxiliary rotating gears 28. The rotating rod 32 is fixedly sleeved with a double-shaft retaining ring 36 away from the drying cylinder 31, and a rectangular frame 37 is sleeved on the outside of the double-shaft retaining ring 36. A cylinder 38 is provided between the side of the rectangular frame 37 and the inner side wall of the machine frame 1. Pre-treatment stage: First, the iron concentrate powder is introduced into the drying cylinder 31 through the feed guide tube and dried inside the drying cylinder 31. During this process, the dual-shaft motor 24 is started and the main rotating gear 23 is driven to rotate. The main rotating gear 23 meshes with the rotating cylinder 22 to realize the rotation of the rotating cylinder 22. The rack on the top surface of the rotating cylinder 22 meshes with the auxiliary rotating gear 28 to drive the driven gear 35 connected to the auxiliary rotating gear 28 to drive the rotating rod 32 to rotate. The ring magnetic ring 33 on the rotating rod 32 rotates accordingly, and performs primary magnetic separation on the iron concentrate powder in the drying cylinder 31 to remove metal impurities. It is worth noting that during the drying process, cylinder 2 38 can push the rectangular sleeve 37, causing the double-shaft retaining ring 2 36 and the rotating rod 32 to make appropriate position adjustments to ensure the uniformity and effectiveness of magnetic separation. As the rotating drum 22 continues to rotate, when the iron concentrate powder is dried to a stable moisture content, cylinder 2 38 continuously pushes the double-shaft retaining ring 2 36, the rotating rod 32, and the pusher plate 34 to move. Because the pusher plate 34 is compatible with the inner diameter of the drying drum 31, it is convenient to push out all the material inside the drying drum 31 until... Iron concentrate powder is pushed onto the surface of the circular plate 27. At this time, 0.2% of the raw material mass of silane coupling agent is quantitatively added into the positioning cylinder 26 to fully mix the material with the silane coupling agent and perform dynamic grinding until the particle size of the mixture meets the standard. After grinding, the material is screened and centrifuged to export the particles to the post-processing component 4. Then, it is further separated by electromagnetic separation to remove residual impurities. At the same time, the vacuum freezer at the bottom of the inner side wall of the frame 1 is used for freeze drying to retain the active components of the material to the greatest extent.

[0023] Example 3: Please refer to Figure 4 - Figure 6 As shown, a pressure roller 29 is fixedly sleeved at one end of the shaft extending inside the positioning cylinder 26, and the bottom surface of the pressure roller 29 contacts the surface of the placement circular plate 27. The surface of the placement circular plate 27 is set with a mesh, and its edge is provided with toothed grooves. A lifting rod 210 is fixedly installed at the center of the top surface of the placement circular plate 27, and a double shaft retaining ring 211 is fixedly installed at the top of the lifting rod 210. An H-shaped sleeve 212 is sleeved on the outside of the double shaft retaining ring 211, and a cylinder 213 is provided between the top end of the H-shaped sleeve 212 and the top inner wall of the machine frame 1. Dynamic grinding stage: According to the content of Example 2, as the rotating drum 22 continues to rotate, the pressure roller 29 rotates synchronously with the rotating drum 22 through the shaft transmission connection. The bottom surface of the pressure roller 29 contacts the surface of the placement circular plate 27, forming a rolling and squeezing force on the material on the placement circular plate 27. This force works synergistically with the chemical bonding force generated by the mixing of silane coupling agent, so that the material particles are broken more uniformly in dynamic grinding. When it is necessary to adjust the grinding pressure, the cylinder 213 pushes the H-shaped sleeve 212 through extension and retraction, driving the double shaft retaining ring 211 and the lifting rod 210 vertically upward, thereby changing the distance between the placement circular plate 27 and the pressure roller 29, and realizing the dynamic adjustment of the grinding pressure. During the grinding process, materials smaller than the mesh holes on the surface of the circular plate 27 fall directly through the holes to the post-processing component 4. The remaining uniformly crushed material particles are then pushed vertically downward by cylinder 213 to the H-shaped frame 212, double-shaft retaining ring 211, and lifting rod 210 after grinding, until the circular plate 27 is flush with the centrifugal toothed disc 25. Driven by the dual-shaft motor 24, the centrifugal toothed disc 25 rotates and drives the circular plate 27 to rotate. Under the action of centrifugal force, the mixed material on its surface is evenly dispersed and falls into the next stage.

[0024] Example 4: Please refer to Figure 7 As shown, the post-processing component 4 includes a material distribution frame 41 disposed inside the lower cavity. Several sets of electromagnetic rollers 42 are rotatably arranged at equal distances inside the material distribution frame 41, and several sets of blocking blocks 43 are fixedly installed at equal distances outside the electromagnetic rollers 42. Secondary magnetic separation stage: After dynamic grinding, the material enters the distribution frame 41. Since the electromagnetic roller 42 is equipped with a blocking block 43, when the material falls onto the surface of the electromagnetic roller 42, the blocking block 43 will prevent the material from sliding directly, so that the material has enough time to stay on the surface of the electromagnetic roller 42. At the same time, the electromagnetic roller 42 is energized to generate a magnetic field, which adsorbs the residual metal impurities in the material, realizing the secondary magnetic separation of impurities. The material after secondary magnetic separation continues to fall and enters the next processing stage.

[0025] Working principle: When using this invention, iron concentrate powder is first introduced into the drying cylinder 31 through the feed guide tube. The dual-shaft motor 24 is started, which drives the main rotating gear 23 to rotate. The main rotating gear 23 meshes with the rotating cylinder 22, causing the rotating cylinder 22 to rotate. This causes the auxiliary rotating gear 28, the driven gear 35, and the rotating rod 32 to rotate in sequence. The annular magnetic ring 33 on the rotating rod 32 performs primary magnetic separation on the iron concentrate powder in the drying cylinder 31 to remove metal impurities. At the same time, the heating plates on the inner wall of the drying cylinder 31 achieve precise control of the hot air temperature under the linkage of the temperature sensor, thus drying the iron concentrate powder. After the material moisture content stabilizes during drying, cylinder 2 38 pushes the rectangular sleeve 37, which in turn moves the double-shaft retaining ring 36 and the rotating rod 32. The pushing disc 34 on the rotating rod 32 pushes the iron concentrate powder in the drying cylinder 31 into the surface of the placement disc 27 in the positioning cylinder 26. At this time, 0.2% of the raw material mass of silane coupling agent is quantitatively added into the positioning cylinder 26 to fully mix the material with the silane coupling agent. The rotating cylinder 22 continues to rotate, driving the shaft and pressure roller 29 to rotate. The pressure roller 29 forms a rolling extrusion force on the material on the placement disc 27. The chemical bonding force generated by the mixing with the silane coupling agent works synergistically to achieve more uniform crushing of the material particles during dynamic grinding. When the grinding pressure needs to be adjusted, cylinder 213 pushes the H-shaped sleeve 212 by telescopic movement, which drives the double-axis retaining ring 211 and lifting rod 210 to move vertically, changing the distance between the placement disc 27 and the pressure roller 29. After grinding, cylinder 213 pushes the H-shaped sleeve 212, double-axis retaining ring 211 and lifting rod 210 vertically downward until the placement disc 27 is flush with the centrifugal toothed disc 25. Driven by the dual-axis motor 24, the centrifugal toothed disc 25 rotates and drives the placement disc 27 to rotate. Under the action of centrifugal force, the mixture on its surface is evenly dispersed and falls into the distribution frame 41. The electromagnetic roller 42 inside the feeding frame 41 is energized to generate a magnetic field. The resistive blocks 43 on the surface prevent the material from sliding directly down, allowing the material to stay on the surface of the electromagnetic roller 42 for a sufficient time to adsorb residual metal impurities in the material, thus achieving secondary magnetic separation of impurities. After secondary magnetic separation, the material continues to fall, and at the same time, the vacuum freezer at the bottom of the inner side wall of the frame 1 is used to freeze-dry the material to retain the active components of the material to the greatest extent. Finally, the material is taken out and subjected to multi-dimensional quality testing using a laser particle size analyzer, a magnetic permeability analyzer, and a moisture content analyzer to ensure that the iron oxide powder meets the core index requirements of controllable iron oxide powder for abrasives.

[0026] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A process for processing iron oxide powder with controllable abrasive, characterized in that, Includes the following steps: S1: Preliminary magnetic separation and drying combined treatment: Select iron concentrate powder and introduce it into the processing device. First, perform primary magnetic separation to remove metal impurities, and then perform rotary drying until the moisture content of the material is stable. S2: Dynamic grinding: Add 0.2% of the raw material mass of silane coupling agent, and then adjust the dynamic grinding in sequence until the particle size of the mixture meets the standard. S3: Post-processing: The particulate matter is removed by sieving and centrifugation, and then further separated by electromagnetic separation to remove residual impurities. At the same time, the material is freeze-dried by vacuum freezing technology to retain the active components to the greatest extent. S4: After the material is removed, multi-dimensional quality testing is carried out using a laser particle size analyzer, magnetic permeability analyzer, and moisture content analyzer to ensure that the iron oxide powder meets the core index requirements of controllable iron oxide powder for abrasives. The processing device used in the above processing method includes a frame (1), a dynamic grinding mechanism (2) and a pre-treatment structure (3) are provided at the upper end of the frame (1), a post-treatment component (4) is provided at the lower end of the frame (1), and a vacuum freezer is provided at the bottom of the inner side wall of the frame (1).

2. The abrasive-controlled iron oxide powder processing device according to claim 1, characterized in that, The dynamic grinding mechanism (2) includes a shelf (21) fixedly installed inside the upper part of the frame (1). A rotating cylinder (22) is provided at the center of the surface of the shelf (21). Several sets of racks are provided at equal distances on the outer wall and top edge of the rotating cylinder (22). Main rotating gears (23) are meshed on both sides of the rotating cylinder (22). The bottom of the main rotating gears (23) is rotatably connected to the surface of the shelf (21). A dual-axis motor (24) is provided at the bottom of one set of the main rotating gears (23). A centrifugal toothed disc (25) is provided at the bottom output end of the dual-axis motor (24).

3. The abrasive-controlled iron oxide powder processing device according to claim 2, characterized in that, Several sets of positioning cylinders (26) are provided through the center of the rotating cylinder (22). The bottom edge of the positioning cylinder (26) is fixedly connected to the inner wall of the rectangular groove provided at the center of the shelf (21) through the support plate. A circular plate (27) is movably installed inside the positioning cylinder (26).

4. The abrasive-controlled iron oxide powder processing device according to claim 3, characterized in that, The positioning cylinder (26) has shafts running through its front, rear and side frames. An auxiliary rotating gear (28) is fixedly installed at one end of the shaft extending outside the positioning cylinder (26), and the bottom of the auxiliary rotating gear (28) meshes with a rack on the top surface of the rotating cylinder (22). A pressure roller (29) is fixedly sleeved at one end of the shaft extending inside the positioning cylinder (26), and the bottom surface of the pressure roller (29) contacts the surface of the circular plate (27).

5. The abrasive-controlled iron oxide powder processing device according to claim 3, characterized in that, The surface of the circular plate (27) is mesh-like, and the edge is provided with toothed grooves. A lifting rod (210) is fixedly installed at the center of the top surface of the circular plate (27), and a double-axis retaining ring (211) is fixedly installed at the top of the lifting rod (210). An H-shaped sleeve (212) is sleeved on the outside of the double-axis retaining ring (211), and a cylinder (213) is provided between one end of the top surface of the H-shaped sleeve (212) and the inner wall of the top of the machine frame (1).

6. The abrasive-controlled iron oxide powder processing device according to claim 1, characterized in that, The pretreatment structure (3) includes a drying cylinder (31) installed on one side of the top frame of the positioning cylinder (26), and a feeding conduit is provided at the center of the top of the drying cylinder (31). A rotating rod (32) is horizontally arranged inside the drying cylinder (31), and several sets of magnetic rings (33) are sleeved at equal intervals at the section of the rotating rod (32) inside the drying cylinder (31). The magnetic rings (33) and the rotating rod (32) are fixedly connected by several sets of connecting blocks.

7. The abrasive-controlled iron oxide powder processing device according to claim 6, characterized in that, A pusher plate (34) is fixedly sleeved on the outside of the rotating rod (32) and inside the drying cylinder (31) away from the opening end. The outer diameter of the magnetic ring (33) is smaller than the inner diameter of the drying cylinder (31), and the outer diameter of the pusher plate (34) is adapted to the inside of the drying cylinder (31). The inner wall of the drying cylinder (31) is provided with heating elements, which are linked with the temperature sensor to achieve precise control of the hot air temperature.

8. The abrasive-controlled iron oxide powder processing device according to claim 7, characterized in that, The rotating rod (32) is fixedly sleeved with a driven gear (35) outside the drying cylinder (31), and the driven gear (35) meshes with one of the auxiliary rotating gears (28). The rotating rod (32) is fixedly sleeved with a double-shaft retaining ring (36) away from the drying cylinder (31), and a rectangular sleeve (37) is sleeved on the outside of the double-shaft retaining ring (36). A cylinder (38) is provided between the side of the rectangular sleeve (37) and the inner side wall of the machine frame (1).

9. The abrasive-controlled iron oxide powder processing device according to claim 1, characterized in that, The post-processing component (4) includes a material distribution frame (41) disposed inside the lower cavity. Several sets of electromagnetic rollers (42) are rotatably arranged at equal distances inside the material distribution frame (41), and several sets of blocking blocks (43) are fixedly installed at equal distances outside the electromagnetic rollers (42).

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